JPH09377A - Reclining seat - Google Patents

Abstract

PURPOSE: To prevent the slip of the hips in such a state that a backrest part is inclined by providing a reclining seat with a seat part lift mechanism raising the leading end part of a seat part corresponding to the gradual tilting of the backrest part and lowering the same when the backrest part is tilted by a predetermined angle or more. CONSTITUTION: A seat part lift mechanism 5 is provided with a shaking lever 51 freely revolving around a shaft Q6 and a cam 52 raising and lowering a seat part 1 accompanied by the shaking thereof on a base stand 7. A pair of shaking levers 51 are placed on this side and a deep side and the shaft Q7 attached to the left end part of a slide rod 42 is engaged with the slot 51a formed to the lower end part of the lever 51 in a freely revolvable and shakable manner. When a backrest part 2 is tilted within a predetermined angle range from an erected state, the seat part 1 is revolved clockwise centering around a shaft Q1 corresponding to the tilting angle thereof to be raised on its leading end side. When the backrest part 2 is tilted by a predetermined angle or more, the seat part 1 is reversed centering around the shaft Q1 corresponding to the tilting angle thereof.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reclining seat whose backrest can be adjusted to a desired angle.

[0002]

2. Description of the Related Art Conventionally, a reclining seat whose backrest can be adjusted to a desired angle as a medical examination sheet for a hospital, a hairdressing sheet for a barber shop, a train, an automobile, an aircraft, etc. Is often used.
Also, regarding beds for nursing care and the like, there are provided beds in which a portion corresponding to the back can be raised so that it can be used as a reclining seat.

However, in the conventional reclining seat, when the backrest is tilted by a desired angle from the upright state, the hips tend to slip forward depending on the tilt angle. For this reason, there is a problem in that a space between the hips and the backrest is opened, the back is bent and the posture becomes cramped, and fatigue is promoted. The present invention has been made in view of the above problems, and an object of the present invention is to provide a reclining seat capable of suppressing slipping of the hips with the backrest tilted.

[0004]

A reclining seat according to a first aspect of the present invention for achieving the above object is capable of leaning a seat on which a hip is placed, a backrest along which the back is placed, and the backrest at a desired angle. In a reclining seat including a reclining mechanism, when the backrest part is gradually tilted from the standing state, the tip side of the stool is lifted according to the tilt angle, and the backrest part is tilted by a predetermined angle or more, and It is characterized by comprising a stool lifting mechanism for lowering the tip end side of the lifted stool according to the tilt angle.

A reclining seat according to a second aspect is the reclining seat according to the first aspect.
An auxiliary seat vertically rotatably erected on the tip of the stool, and an auxiliary seat for mounting a calf, and when gradually tilting the backrest from an upright position, depending on the tilt angle,
An auxiliary seat rotation mechanism for rotating the auxiliary seat so that the front end side of the auxiliary seat is lifted.

Further, the reclining seat according to a third aspect is the reclining seat according to the second aspect, in which the backrest, the seat portion and the auxiliary seat are horizontally continuous with the backrest tilted horizontally. Is characterized by.

[0007]

According to the reclining seat of the first aspect, when the backrest is gradually tilted from the upright state, the stool lifting mechanism moves the tip end side of the lounge according to the tilting angle of the backrest. lift. Therefore, it is possible to prevent the hips from sliding forward. Further, when the backrest is further tilted and the tilt angle becomes equal to or more than a predetermined angle, the stool lifting mechanism lowers the tip side of the lifted stool. Therefore, even when the backrest is tilted by a predetermined angle or more, a comfortable posture can be maintained.

According to the reclining seat of the second aspect, when the backrest portion is gradually tilted from the upright state, the auxiliary seat rotation mechanism rotates the auxiliary seat so that the front end side thereof is lifted. Therefore, the calf portion can be placed on the auxiliary seat while the backrest portion is tilted.

According to the reclining seat of the third aspect, since the backrest portion, the seat portion and the auxiliary seat are horizontally continuous in a state where the backrest portion is tilted horizontally, the reclining seat has a comfortable posture similar to that of the bed. Can be taken.

[0010]

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. FIG. 1 is a side view showing an embodiment of a reclining seat of the present invention. This reclining seat includes a stool part 1 on which the buttocks are placed, a backrest part 2 along which the back is placed, an auxiliary seat 3 on which the calf is placed, a reclining mechanism 4 for adjusting the tilt angle of the backrest part 2, and the above A stool raising / lowering mechanism 5 for appropriately raising / lowering the tip side of the stool 1 according to the tilt angle of the backrest 2, and an auxiliary seat rotation for rotating the auxiliary seat 3 according to the tilt angle of the backrest 2. The mechanism 6 and a base 7 that supports them constitute a main part.

A predetermined portion of the stool 1 near the backrest 2 is attached to the base 7 so as to be rotatable about an axis Q1. The backrest 2 is attached to the base 7 so as to be rotatable about an axis Q2, and can be tilted at a desired angle by the reclining mechanism 4. Furthermore, one end of the auxiliary seat 3 is attached to the tip of the stool 1 so as to be rotatable about the axis Q3. This auxiliary sheet 3 is used for the backrest 2
In the upright state, the chair 1 hangs obliquely downward from the tip of the stool 1.

The reclining mechanism 4 includes a rotating arm 41 rotatably mounted on the base 7 about the axis Q2, and a slide rod horizontally slidably mounted on the base 7. 42 and this slide rod 4
A lock mechanism 43 for locking 2 at an arbitrary slide position, and an operation lever 44 for operating this lock mechanism 43.
And A pair of the rotating arms 41 are provided on the front side and the rear side in FIG.
1 is rotatably attached to a base 7 with its upper part fixed to the side surface of the backrest 2 so that it can rotate integrally with the backrest 2 about the axis Q2. .

Further, a pair of the slide rods 42 are provided on the front side and the back side in FIG. 1 so as to reciprocally slide in association with the rotation of the rotating arm 41, that is, the backrest portion 2. The shaft Q4 at the right end portion is engaged with the elongated hole 41a at the lower end portion of the rotating arm 41 in a rotatable and slidable manner so as to reciprocally slide in conjunction with the rotating operation. Further, the slide rod 42 is constantly urged in the right direction in FIG. 1 by the compression coil spring 45 fitted on the outer periphery thereof, thereby returning the tilted backrest portion 2 to the standing state. Is able to.

The lock mechanism 43 is formed by meshing a second rack gear 43b with a first rack gear 43a formed on the upper surface of the intermediate portion of one slide rod 42. 43b is attached to the base 7 so as to be able to move up and down so that the meshed state with the first rack gear 43a can be released. Further, the second rack gear 43b is always the first rack gear 43a.
It is biased downward by a coil spring (not shown) so as to mesh with. The operation lever 44 is substantially L-shaped, and its bending portion is attached to the base 7 so as to be rotatable around an axis Q5, and the lower end portion thereof is The head of a rod 43c protruding from the second rack gear 43b is engaged. Therefore, if the operation lever 44 is rotated counterclockwise in FIG. 1, the second rack gear 43b can be lifted and the meshing state with the first rack gear can be released. In this state, The backrest 2 can be rotated about the axis Q2. Further, when the operation lever 44 is returned to the original position by rotation, the first rack gear 43a can be engaged with the second rack gear 43b again to lock the backrest portion 2 at a predetermined tilt angle.

The stool raising / lowering mechanism 5 is a swing lever 51 mounted on the base 7 so as to be rotatable about an axis Q6.
And a cam 52 for moving up and down the tip side of the stool 2 in accordance with the swing of the swing lever 51. A pair of the rocking levers 51 are provided on the front side and the back side in FIG. 1, and the long hole 51 at the lower end of each rocking lever 51 is provided.
A shaft Q7 provided at the left end of the slide rod 42 is engaged with a in a rotatable and slidable manner. Therefore, the swing lever 51 can rotate in conjunction with the rotation operation of the backrest 2. In addition, each swing lever 5
The upper end of the cam 1 has a cam 52 via a cam follower 51b.
Is brought into contact with the cam surface 52a.

The cam 52 is formed by forming a long hole in a flat plate and configuring the upper portion of the inner peripheral surface thereof as the cam surface 52a. The cam surface 52a has a central portion projecting downward with respect to both end portions thereof, and the both end portions and the central portion are continuous with a smooth curve. Therefore, when the backrest 2 is tilted within a predetermined angle (for example, 45 °) from the standing state, the stool 1 is rotated clockwise about the axis Q1 in accordance with the tilt angle, The tip side can be lifted up (see the chain double-dashed line in FIG. 1), and when the backrest 2 is tilted more than the above angle, the stool 1 is reversed about the axis Q1 according to the tilting angle, and the lifting is performed. The tip side of the seated portion 1 can be lowered.
The lifting stroke of the stool 1 is, for example, 3 to 7 cm, depending on the length of the stool 1 and the material of the surface so that the hips on the stool 1 do not slip forward as the backrest 2 tilts. Is appropriately set within the range.

The auxiliary seat turning mechanism 6 is composed of a connecting rod 61 that connects the shaft Q7 at the left end of the slide rod 42 and the intermediate part of the auxiliary seat 3. One end of the connecting rod 61 is rotatably connected to the axis Q7 of the slide rod 42, and the other end of the connecting rod 61 is connected to the axis Q of the auxiliary seat 3.
It is connected so as to be rotatable around 8. Therefore, when the backrest 2 is tilted from the upright state, the auxiliary seat 3 is rotated about the axis Q3 in the clockwise direction in FIG. 1 in accordance with the tilt angle. In the reclining seat, with the backrest 2 tilted substantially horizontally,
The stool 1 is returned to the horizontal state, and the auxiliary seat 3 is almost horizontal, that is, the backrest 2 and the stool 1
Also, the auxiliary sheet 3 is configured to be horizontally continuous (see the dashed line in FIG. 1).

In the reclining seat having the above construction, when the backrest 2 is tilted from the standing state by a predetermined angle, the tip end side of the stool 1 is lifted according to the tilted angle. It can prevent the hips from slipping forward and bending the back.
Therefore, it is possible to maintain a comfortable posture that does not easily cause fatigue for a long time. Moreover, when the backrest 2 is tilted by a predetermined angle or more, the tip end side of the lifted stool 1 is gradually lowered, so that a comfortable posture can be maintained at any tilting angle of the backrest 2.

Since the auxiliary seat 3 is lifted in association with the tilting of the backrest 2, the auxiliary seat 3
As a result of being able to put the calf part on, it is possible to maintain a more comfortable posture. Further, since the backrest 2, the stool 1 and the auxiliary seat 3 are horizontally continuous in a state where the backrest 2 is tilted substantially horizontally, it is possible to maintain the same comfortable posture as when sleeping in a bed. You can

FIG. 2 is a schematic view showing another embodiment of the stool raising / lowering mechanism 5. In this embodiment, the stool 1 is moved up and down by fluid pressure such as hydraulic pressure or pneumatic pressure. More specifically, the slide rod 4
At the left end side of 2, the piston 53a is provided in the cylinder 53b.
Is provided, and the piston 53a is connected to the slide rod 42 via a piston rod 53c. A fluid supply / discharge port 53d is provided in the middle of the cylinder 53b. Further, below the tip side of the stool 1 is provided a fluid pressure cylinder 54 for moving up and down the tip side of the stool 1. The fluid pressure cylinder 54 is connected to the pump 53 via a pipe 54b. It is connected to the fluid supply / discharge port 53d.

In this embodiment, when the backrest 2 is tilted by a predetermined angle from the upright position, the piston 53a of the pump 53 moves leftward in the figure via the slide rod 42 in conjunction with this. Cylinder 53b
The fluid inside is discharged from the fluid supply / discharge port 53d, and the discharged fluid is supplied to the fluid pressure cylinder 54 through the pipe 54b. As a result, the fluid pressure cylinder 54 causes the tip side of the stool 1 to be seated. Can be lifted by a predetermined amount. When the backrest 2 is tilted by a predetermined angle or more and the piston 53a of the pump 53 passes through the fluid supply / discharge port 53d of the cylinder 53b, the fluid is supplied to the fluid pressure cylinder 54 by the weight and the own weight of the stool portion 1. As a result of the fluid being backflowed into the cylinder 53b, the tip side of the lifted stool 1 can be lowered.

FIG. 3 is a schematic view showing still another embodiment of the stool lifting mechanism 5. In this embodiment, the lifting and lowering of the stool 1 is performed by a link mechanism. With reference to the figure, the sitting portion lifting mechanism 5 includes a parallel link 55 including a first rod 55a, a second rod 55b and a third rod 55c, and the third rod 55a.
And a guide member 56 for guiding the slide of the lower end of the rod 55c in the horizontal direction.

The first rod 55a rotates integrally with the backrest portion 2 about the axis Q2, and the right end of the second rod 55b with respect to the lower end portion thereof has the axis Q9 as the center. It is rotatably connected. The left end portion of the second rod 55b is rotatably connected to the lower end portion of the third rod 55c about the axis Q10, and the upper end portion of the third rod 55c is It is rotatably connected to the stool 1 about an axis Q11. The third above
The rod 55c and the shafts Q10 and Q11 are integrally formed by bending a round bar (see FIG. 4), and the shaft Q10 has a roller 57 for rolling or a rolling bearing. Installed.

The guide member 56 has a hollow structure having a rectangular cross section, and long holes 56a for inserting the shaft Q10 are formed in the front surface and the back surface of the guide member 56. Rolling rollers 57 are accommodated so that they can roll. The second rod 55b is connected to the shaft Q10 outside the guide member 56.

According to this embodiment, when the backrest portion 2 is tilted from the standing state by a predetermined angle, the first parallel link 55 is moved.
Rod 55a rotates clockwise in FIG. 3 around the axis Q2 to move the axis Q10 to the left in the figure via the second rod 55b. As a result, the third rod 5
5c can be erected and the stool 1 can be lifted up (see the chain double-dashed line in FIG. 3). Then, when the backrest 2 is further tilted and the shaft Q10 passes directly below the shaft Q11, the third rod 55c tilts again, so that the stool 1 can be lowered.

The reclining seat of the present invention is not limited to the above-mentioned embodiment, and for example, the stool 1
Is configured to be slidable in the horizontal direction in conjunction with the pivotal movement of the backrest portion 2, and with the horizontal sliding of the stool portion 1, the tip thereof is moved up and down by a cam, and the tilt angle of the backrest portion 2 is detected. Therefore, various design changes can be made, such as electrically detecting the position, and moving the stool 1 up and down with a pulse motor according to the detected value.

[0027]

As described above, according to the reclining seat of the present invention, when the backrest is gradually tilted from the standing state, the stool lifting mechanism moves the stool of the stool according to the tilting angle of the backrest. Since the tip side can be lifted, the hips can be prevented from sliding forward. Therefore, it is possible to prevent the inconvenience of bending the back and promoting fatigue.
Moreover, when the backrest portion is further tilted, the tip end side of the lifted stool portion can be gradually lowered by the stool raising / lowering mechanism. Can be maintained.

Further, according to the reclining seat of the second aspect, when the backrest portion is gradually tilted from the upright state, the auxiliary seat rotation mechanism can gradually lift the front end side of the auxiliary seat, so that the backrest portion. The calf portion can be placed on the auxiliary seat in a state where the calf is tilted. Therefore, it is possible to maintain a more comfortable posture in combination with the lifting operation of the stool.

Further, according to the reclining seat of the third aspect, in the state where the backrest is tilted horizontally,
Since the backrest portion, the stool portion and the auxiliary seat are horizontally continuous, it is possible to assume the same posture as the bed.
Therefore, it is possible to take a very comfortable posture.

[Brief description of drawings]

FIG. 1 is a side view showing an embodiment of a reclining seat of the present invention.

FIG. 2 is a side view showing another embodiment.

FIG. 3 is a schematic side view showing still another embodiment.

3 is a sectional view taken along line IV-IV in FIG.

[Explanation of symbols]

 1 Seating part 2 Backrest part 3 Auxiliary seat 4 Reclining mechanism 5 Seating part elevating mechanism 6 Auxiliary seat rotation mechanism

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[Procedure amendment]

[Submission date] November 17, 1995

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Brief description of drawings

[Correction method] Change

[Correction contents]

[Brief description of drawings]

FIG. 1 is a side view showing an embodiment of a reclining seat of the present invention.

FIG. 2 is a side view showing another embodiment.

FIG. 3 is a schematic side view showing still another embodiment.

FIG. 4 is a sectional view taken along line IV-IV of FIG.

[Explanation of reference numerals] 1 stool 2 backrest 3 auxiliary seat 4 reclining mechanism 5 stool lifting mechanism 6 auxiliary seat rotation mechanism

Claims (3)

[Claims] Claims: 1. A reclining seat comprising a stool on which a hip is placed, a backrest along which the back is laid, and a reclining mechanism capable of tilting the backrest at a desired angle, wherein the backrest is gradually tilted from an upright position. And, depending on the tilt angle, lift the tip side of the stool,
A reclining seat comprising a stool lifting mechanism for lowering the tip end side of the lifted stool according to the tilt angle when the backrest is tilted by a predetermined angle or more. 2. An auxiliary seat rotatably hung at the tip of the stool for placing a calf portion, and the backrest portion is gradually tilted from an upright position, and the seat is tilted depending on the tilt angle. The reclining seat according to claim 1, further comprising: an auxiliary seat rotation mechanism that rotates the auxiliary seat so that a front end side thereof is lifted. 3. The reclining seat according to claim 2, wherein the backrest, the seat and the auxiliary seat are horizontally continuous in a state where the backrest is tilted horizontally.