JPH0439710Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a reclining seat, and more particularly to a reclining seat in which the seat can also be tilted as the backrest is tilted.

(Prior Art) Various seats used in general homes, hospitals, vehicles, aircraft, etc. have their backrests tilted at different angles so that they can take a posture that suits the user's needs or preferences. Increasingly, seats are configured as so-called reclining seats that can be changed freely. That is, in this type of conventional reclining seat, the lower end of the backrest is rotatably connected to the frame of the reclining seat.

Such conventional reclining seats are sufficient in the sense that the inclination angle of the user's upper body can be freely changed, but if only the inclination angle of the backrest is changed, If the angle of the backrest is actually tilted, the following problems will occur. In other words, when the user tilts the back rest while keeping the upper body in contact with the back rest, the gravity of the upper body is applied to the direction of inclination of the back rest.
This force acts to shift the lower body toward the front of the seat. If this happens, not only will the patient become uneasy every time the backrest is tilted, but they will also have to correct their posture again when the tilt is complete, which can be extremely difficult, especially for sick people who cannot move their upper bodies freely. That would be inconvenient. Also,
For seats that must be used for long periods of time, such as aircraft seats, the backrest may be placed in a completely horizontal position and used as a bed. With such seats, not only does the above-mentioned problem occur when the backrest is tilted from an upright position, but also when the backrest is placed in a horizontal position, the seat does not return to the horizontal position. There must be. This is because the seat and backrest need to form a flat surface on which the user can rest comfortably.
Therefore, in such a reclining seat that can also be used as a bed, the rear end of the seat must be constructed so that it can move up and down depending on the state of use. The above is also required when returning the backrest from a horizontal position to an upright position.

Therefore, the inventors etc., even when the backrest is made to be in a tilted state or even in a horizontal state,
In order to develop a reclining seat that allows the user's body to follow the reclining seat, as a result of researching and researching conventional technologies, it was found that there was no prior art that had this purpose and the means to solve it. . In order to complete such a reclining seat, the seat is constructed so that it slopes according to the slope of the backrest, so that when the gravity of the upper body is applied, the rear end of the seat He made the new discovery that doing so in a downward direction produces very good results, and completed the present invention.

(Problem to be solved by the invention) The invention was developed based on the above-mentioned circumstances, and the problem to be solved is the misalignment of the body when the backrest of a reclining seat is tilted. .

The purpose of the present invention is to configure the seat to move up and down according to the inclination of the backrest so that the user's body does not shift on the seat even if the backrest is inclined. To provide a reclining seat with a simple configuration.

(Means for Solving the Problems) In order to solve the above problems, the means adopted by the present invention are as follows with reference to the figures corresponding to the embodiments: The lower end of this back rest 40 is rotatably connected to the frame 10, and the drive mechanism 20 is connected to the lower end of this back rest 40.
In the reclining seat in which the inclination angle of the backrest 40 can be arbitrarily set by driving the drive mechanism 20, the front end of the seat part 30 can be rotated in the vertical direction with respect to the frame 10. The rear end of the seat 30 can be moved up and down by connecting them, and the rear end side of the seat 30 and the lower end of the backrest 40 are connected so that one end thereof can be rotated to the rear end side of the seat 30. a first arm 50 which is movably connected; and a second arm whose one end is rotatably connected to the other end of the first arm 50 and whose approximately central portion is rotatably connected to the lower end of the backrest 40. A guide member 62 connected to the second arm 60 and provided at the other end of the second arm 60 or the lower end of the back rest 40 is connected to the back rest 40.
The reclining seat 100 is characterized in that the reclining seat 100 is adapted to be engaged in an elongated hole 71 formed in the lower end of the second arm 60 or the other end of the second arm 60.

That is, in the case of this Lin lining sheet 100, the rear end side part of the seat part 30 and the lower end part of the backrest 40 are connected to the first arm 50 and the second arm 60.
At the same time, the rotation of the second arm 60 is restricted by the elongated hole 71, so that when the backrest 40 is tilted at a predetermined angle, the rear end of the seat portion 30 is actively lowered. When the back rest 40 is in an upright state and a horizontal state, the seat portion 30
It is designed to return the plane to a horizontal state.

(Operation of the invention and mode of use) The operation of the reclining seat 100 according to the present invention configured as above will be explained in detail together with the mode of use thereof.

As for the seat portion 30 constituting the reclining seat 100 of the present invention, the front end portion 32 thereof is rotated around the connecting shaft 1 located horizontally in front of the frame body 10, as illustrated in the embodiment described later. Since they are movably connected, the rear end portion of the seat portion 30 can be moved up and down, for example, with the upper limit being in the horizontal state.
Therefore, if a person is sitting on this, the person's buttocks will move up and down in accordance with the up and down movement of the seat 30.

On the other hand, the backrest 40 is rotatably connected to the frame 10 by the pivot shafts 43 of the connecting parts 42 located at the lower end thereof, so that it can be tilted from its upright state. Furthermore, in this embodiment, it is possible to tilt even to a horizontal state. Therefore, if a person's back is in contact with this backrest 40, the person's back will be inclined in accordance with the inclination of the backrest 40.

And reclining seat 1 according to the present invention
00, the rear end side of the seat 30 and the backrest 4
0 and the lower end of the first arm 50 and the second arm 6
Since they are connected by 0, the backrest 4 mentioned above
The rear end portion of the seat portion 30 moves up and down in conjunction with the zero inclination.

Next, the seat portion 30 due to the inclination of the backrest 40
The vertical movement of will be specifically explained with reference to FIGS. 9 to 11. 9 to 11, the connecting block 7 is connected to the connecting portion 42 of the backrest 40.
0, the first arm 50, the second arm 60, and the base frame 31 constituting the seat part 30 are shown in an enlarged manner connected to each other in sequence, and each of these connecting parts 42, the first arm 50, and the base frame 31 constituting the seat part 30 are The two arms 60 and the base frame 31 are each rotatable at their connecting portions. Further, in the embodiment described later, each connecting portion 42 and the second arm 60 are connected via a connecting block 70, and a long hole 71 is formed in the connecting block 70. Therefore, the following explanation of the operation will focus on this embodiment.

The vertical movement of the seat portion 30 due to the inclination of the backrest 40 is as follows. That is, the state shown in FIG. 9 is when the backrest 40 is upright, in other words, it is the same state as shown in FIG. 1, and in this case, the rear end of the seat 30 is normally In other words, it is in a horizontal state without falling. In the state shown in FIG. 9, at first glance it seems that the rear end of the seat 30 is lowered, but the first arm 50 and the second arm 60 are Since the connecting block 70 is guided and supported within the elongated hole 71, and the rear end of the base frame 31 only rotates within a certain circular trajectory, it is necessary to maintain a straight line as shown in the figure. Basic frame 3
1 is in a tensioned state by the connecting portion 42. As a result, even in the state shown in FIG. 9, the rear end portion of the base frame 31 does not move lower than the state shown.

When tilting the backrest 40 from the state shown in FIG. 9, the connecting portion 42 is rotated clockwise in the drawing about its pivot 43. This rotation is caused by the connection part 4
This is done by a threaded rod 23 connected to the lower end of the screw rod 2, and the threaded rod 23 is rotationally driven by a drive mechanism 20. As described above, when the connecting portion 42 is rotated in the clockwise direction in the figure around the pivot 43, the connecting shaft 61 of the second arm 60 relative to the connecting portion 42 moves to the lower end, and the connecting shaft 61 is moved toward the seat. 30 will approach the front end. In this case, the guide member 62 of the second arm 60 is sequentially guided within the elongated hole 71, and this guide member 62 allows the second arm 60 to rotate until it comes into contact with one end of the elongated hole 71. As a result, the first arm 50 moves downward a little and there is no force to maintain both the first arm 50 and the second arm 60 in a straight line, so the first arm 50 moves downward as shown in FIG.
One end (front end) moves downward due to its own weight and the rotational force of the connecting portion 42 compared to the case shown in FIG. In this manner, when one end of the first arm 50 moves downward, the buttocks of the user located at the rear end of the seat 30 sink down.

If it is desired to place the back rest 40 in a horizontal state, the connecting portion 42 of the back rest 40 is further rotated clockwise in the drawing by the drive mechanism 20. In this case, since the guide member 62 on the second arm 60 side is in contact with one end of the elongated hole 71, the second arm 60 is
3 forcibly rotated clockwise in the drawing.
Therefore, the first arm 50 connected to one end of the second arm 60 is lifted upward. As a result, the rear end portion of the base frame 31 rises, and the seat portion 30 returns to its horizontal state. That is, in this case, the seat portion 30
and the backrest 40 form a horizontal surface.

Next, the present invention will be explained in detail based on the embodiment shown in the drawings.

(Example) FIG. 1 shows a perspective view of a reclining seat 100 according to the present invention, and as shown in FIG.
0 and a back rest 40, the lower end of this back rest 40 is rotatably connected to the frame 10, and a drive mechanism 20 is communicated with the lower end of this back rest 40, so that the drive mechanism 20 The inclination angle of the backrest 40 can be arbitrarily set by driving.

The frame body 10 supports the seat portion 30 and the backrest 40 at a predetermined position, such as on a floor surface, and also serves as a support portion of the drive mechanism 20. That is, this frame 10
A connecting shaft 11 located approximately horizontally is formed at the front end of the seat 30, and this connecting shaft 11 supports the base frame 31 of the seat portion 30 so as to be movable up and down about the connecting shaft 11. . In other words, this frame 10 has a seat portion 30
The front end of the base frame 31 is rotatably supported. In addition, regarding the backrest 40, its base frame 4
The backrest 40 is rotatably connected to the frame 10 by a pivot 43 of a connecting portion 42 formed at the lower end of the backrest 40 . .

The drive mechanism 20 in this embodiment is configured as follows. That is, this drive mechanism 20 is
As shown in FIGS. 2 and 3, the drive mechanism 2
A drive motor 21 serving as a drive source for the frame 10 is provided at the center of the frame 10, and the output shaft of the drive motor 21 is connected to gear boxes 22 located on the left and right sides of the frame 10. The gearbox 22 is rotatably supported on the frame 10, and a threaded rod 23 is screwed into the gearbox 22. The rear end portion of each of these threaded rods 23 is rotatably connected to a connecting portion 42 of the backrest 40.

As described above, in this embodiment, an example has been described in which the drive motor 21 is used as the drive source of the drive mechanism 20. A damper member that uses the pressure of this pressure fluid, a simple spring, or the like can be used. In addition, in this embodiment, two threaded rods 2
3 has been described, however, the backrest 40 may be configured to be tilted by one threaded rod 23.

In the drive mechanism 20 configured as described above, when the drive motor 21 rotates forward or reverse, each threaded rod 23 is rotated, and the threaded rod 23 moves in and out of the gearbox 22 that supports it. . As a result, the threaded rod 23 pushes or pulls the connecting portion 42 of the back rest 40, and the back rest 40
It tilts the In this case, the gearbox 22 is tilted;
This is possible because it is rotatably connected to the frame pair 10.

As shown in FIGS. 1 and 2, the seat portion 30 and the backrest 40 are provided with a base frame 31 and a base frame 41, respectively.
The frame is covered with a predetermined cushion material, decorative cloth, etc., and is rotatably supported at a predetermined location of the pair of frames 10 as described above. The base frame 31 of the seat 30 has its front end 32 connected to the connecting shaft 1 on the frame 10 side.
As shown in FIGS. 4 and 5, a first arm 50 is rotatably connected to the outside of the rear end. Further, the base frame 41 of the backrest 40 has its connecting portion 42 rotatably connected to the frame 10 by a pivot 43. A second arm 60 is rotatably connected to this connecting portion 42 via a connecting shaft 61.

A first arm 50 connected to the seat portion 30 side
is a straight line as shown in FIGS. 6 and 7, and the front end of the first arm 50 is connected to the base by a screw in the bush inserted into the rear end of the base frame 31 of the seat 30. It is rotatably connected to the frame 31. Two second arms 60 sandwiching the first arm 50 are rotatably connected to the rear end portion of the first arm 50 via screws. In this way, although the second arm 60 in this embodiment is illustrated as having two pieces, it may be made of one piece as long as it is made of a material having a predetermined rigidity. . The center portions of these first arms 50 are rotatably connected to the connecting portion 42 of the backrest 40 by screws 63.

In this embodiment, this connection is made by connecting block 70.
It is done through. This connection block 70
is fixed to the connecting part 42 of the backrest 40, and this connecting block 70 has an elongated hole 71 formed therein, and a guide member 62 provided at the rear end of the second arm 60 is inserted into this elongated hole 71. It has been inserted. Further, a protrusion 72 is formed in a part of the connecting block 70, and the protrusion 72 causes the base thereof to be lifted from the connecting portion 42 by a predetermined distance. The elongated hole 71 is centered around the screw 63 that connects the center of the second arm 60, and both ends thereof are configured to restrict movement of the guide member 62. Although this embodiment has been described as having the connecting block 70, the central part of the second arm 60 can be directly connected to the connecting part 42 of the backrest 40, and the guide member 62 is connected to this connecting part 42. If an elongated hole 71 is formed to guide the connecting block 70, this connecting block 70 is not necessarily necessary.

In the above embodiment, the guide member 62 is placed on the second arm 60 side, and the elongated hole 71 is placed on the connecting block 7 side.
0, that is, an example in which they are provided on the connecting portion 42 side, but these may be provided in reverse.
That is, a long hole 71 is formed on the second arm 60 side, and a guide member 62 that engages with this long hole 71 is formed on the second arm 60 side.
It may also be implemented by providing it on the connecting portion 42 side.

(Effect of the invention) As explained above, the reclining seat 100 according to the invention has the following features: "The seat part 30 and the back rest 40 are provided, and the lower end of the back rest 40 is rotatable around the frame 10. At the same time, a drive mechanism 20 is connected to the lower end of the backrest 40.
In the reclining seat in which the inclination angle of the backrest 40 can be arbitrarily set by driving the drive mechanism 20, the front end of the seat part 30 can be rotated in the vertical direction with respect to the frame 10. The rear end of the seat 30 can be moved up and down by connecting them, and the rear end side of the seat 30 and the lower end of the backrest 40 are connected so that one end thereof can be rotated to the rear end side of the seat 30. a first arm 50 which is movably connected; and a second arm whose one end is rotatably connected to the other end of the first arm 50 and whose approximately central portion is rotatably connected to the lower end of the backrest 40. A guide member 62 connected to the second arm 60 and provided at the other end of the second arm 60 or the lower end of the back rest 40 is connected to the back rest 40.
0 or the other end of the second arm 60, and this allows the seat to be adjusted according to the inclination of the backrest. With a simple structure, it is possible to provide a reclining seat that is configured to move up and down and prevents the user's body from shifting on the seat even if the backrest is tilted.

That is, according to this reclining seat 100, when the backrest 40 is tilted at an angle of approximately 45° during the stages of sequentially tilting the backrest 40 from its upright state, the rear end of the seat portion 30, that is, when the backrest 40 is tilted at an angle of about 45°, Since the user's buttocks are positioned at the lowest end, it is possible to prevent the user's buttocks from shifting forward.

In addition, in the case of this reclining seat 100, if the backrest 40 is further tilted, the seat portion 30
Since the rear end portion is lifted, when the backrest 40 becomes horizontal, the seat portion 30 can also be brought to a horizontal state, and the reclining seat 100 can also serve as a bed. It can be made into something.

[Brief explanation of the drawing]

Fig. 1 is an overall perspective view of a reclining seat according to the present invention, Fig. 2 is a side view of the reclining seat with the seat and backrest removed, Fig. 3 is a front view of the same, and Fig. 4 is a view of the reclining seat as shown in Fig. 2. Partially enlarged side view of
Fig. 5 is a partially enlarged front view of Fig. 3, Fig. 6 is a partially enlarged plan view showing the state of connection between the first arm and the second arm, Fig. 7 is a side view of the same, and Fig. 8 is a connecting block. FIG. In addition, each of FIGS. 9 to 11 shows the interlocking relationship between the seat part and the backrest of the reclining seat according to the present invention in the order of the upright state, tilted state, and horizontal state of the backrest. It is a partially enlarged side view. Explanation of symbols, 100... Reclining seat, 10... Frame, 11... Connection shaft, 20... Drive mechanism, 21... Drive motor, 22... Gearbox, 23... Threaded rod, 30... Seat part , 31...
Base frame, 32... Front end, 40... Back rest, 41...
...Base frame, 42...Connection part, 43...Pivot, 50...
...First arm, 60... Second arm, 61... Connection shaft, 62... Guide member, 70... Connection block, 71... Long hole.

Claims (1)

[Claims for Utility Model Registration] This invention comprises a seat and a backrest, the lower end of the backrest is rotatably connected to the frame, and a drive mechanism is connected to the lower end of the backrest. In the reclining seat in which the inclination angle of the backrest can be arbitrarily set by driving a drive mechanism, the front end of the seat is connected to the frame so as to be rotatable in the vertical direction. a first arm whose rear end is movable up and down, and whose one end is rotatably connected to the rear end side of the seat to connect the rear end side of the seat and the lower end of the backrest; and a second arm whose one end is rotatably connected to the other end of the first arm and whose substantially central portion is rotatably connected to the lower end of the backrest; A reclining device characterized in that a guide member provided at the other end of the two arms or the lower end of the backrest is engaged in an elongated hole formed at the lower end of the backrest or the other end of the second arm. sheet.