JPH0433443B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides that the back frame is connected on both sides to the lower part of the couch in a manner that allows it to rise and fall down by means of a linkage having two support stays of different lengths, and a couch in which a seat frame and a back frame are pivotably connected to each other, the pivot axis being located above the seat frame by approximately the thickness of the seat cushion; scissor-shaped levers whose adjacent ends intersect at a point on both sides of the couch, and at each end of the scissor-shaped levers one link plate is arranged as a connection with the back frame or the seat frame; Regarding the format of

Patent No. of the Federal Republic of Germany by the Applicant
1529603, the pivot axis (theoretical pivot center) is located above the seat frame by approximately the thickness of the seat cushion, i.e. the link The fact that no components of the device protrude into the seat cushion provides extremely comfortable sitting and sleeping comfort. However, in this known couch the back frame can only be brought into a purely sitting position or into an essentially horizontal supine position.

In addition to the purely seated and supine positions, further intermediate positions can be adjusted in other known couches, in which the back frame
It is tilted further relative to the seat frame than in a purely seated position. However, in this known design, the actual pivot center protrudes into the seat cushion or even projects further upwards beyond the seat cushion, i.e. the linkage itself is connected to the seat cushion. Since it protrudes into the cushion or extends beyond the seat cushion, it is not possible to obtain comfortable sitting and sleeping comfort. For example, on sofas with armrests, this is not a problem since such a linkage can be hidden in the side armrests, but on couches without armrests, such a configuration may be difficult to use. This is extremely inconvenient in this respect.

It is therefore an object of the present invention to further improve a couch of the type mentioned at the outset in order to maintain the comfort of this couch and to adjust different seating positions between a pure sitting position and a supine position. The object of the present invention is to provide a couch in which the seat frame and the back frame can be fully supported in this intermediate position.

In order to solve this problem, in the configuration of the present invention,
In a couch of the type mentioned at the outset, the back frame is of a per se known type and can be adjusted from the sitting position to the supine position by means of double locking steps and locking pawls attached to scissor-shaped levers connected to the seat frame. A position-fixed support part is lockable at an intermediate position having a flatter slope than the sitting position between the seat frame and the seat frame, and supports a link plate connected to the seat frame in the intermediate position. It is located in the lower range of the pivot axis between it and the back frame.

With such an arrangement, two advantages which hitherto have not been possible to obtain at the same time, namely good use comfort on the couch as disclosed in DE 15 29 603, and pure Both the advantages of obtaining a further intermediate position between the seated position and the supine position can be obtained in a couch without armrests. The correct use of the couch is achieved by supporting the link plate connected to the seat frame in a position-fixed bearing provided in the lower region of the pivot axis between the seat frame and the back frame. The resulting loads are effectively accommodated to the extent that they act on the couch. This applies both when the back frame is swiveled into the intermediate position and when it is swung into the sitting position when the couch is in use.

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

A couch 1 shown in FIGS. 1 to 4 has a seat frame 3 and a back frame 4 connected to a lower portion 2 of the couch.

The seat frame 3 and the back frame 4 are connected to each other by a linkage 5 so as to be pivotable about a pivot axis 6 (theoretical pivot center). The seat frame 3 and the back frame 4 are connected to a link device 5
It is also connected to the couch lower part 2 by.

Of course, one link device 5 is arranged on each end face of the couch 1.

A metal sheet 7 is fixed to the back frame 4 and a further metal sheet 8 is rigidly attached to the seat frame 3. A connecting plate 9 is fixed to the lower part 2 of the couch, to which two support stays 10, 11 are pivotally connected.
The support stay 10 is, on the other hand, pivotally connected to a metal sheet 7 fixed to the back frame 4 .
At its other end, the support stay 11 is pivotally connected to a scissor-shaped lever 12, which in turn has a link plate 13, which is pivotally connected to a sheet metal plate 8 connected to the seat frame 3. It is pivotally connected to.

The scissor-shaped lever 12 has another scissor-shaped lever 1
4 are connected so as to be able to turn around an intersection 15. A further link plate 16 is connected to one end of the scissor-shaped lever 14, which link plate 16 is connected at the other end to the metal sheet 7 of the back frame 4.

On the other side, the link plate 13 is pivotally connected to a metal sheet 8 fixed to the seat frame 3.

As clearly shown in FIG. 9, the scissor-shaped lever 14 is provided with a bent portion 17 extending toward the back side in the area connected to the thin metal plate 8. , this bend 17 has two locking steps 18, 19 at its free end.
A locking pawl 20 cooperating with the two locking steps 18, 19 makes it possible to lock the scissor-shaped lever 14 in two different pivoted positions.

When the locking step 19 is activated, the back frame 4 occupies the seating position shown in FIG. 1, whereas when the locking step 18 is activated, the back frame 4 occupies the position shown in FIG. In this position the back frame 4 has a flatter slope compared to the seated position, in other words the angle formed by the back frame 4 and the seat frame 3 is lower than in the seated position shown in FIG. is also large.

As can be clearly seen in FIG. 4, a support plate 21 is fixed to the lower part 2 of the couch, on which a link plate 13 is attached with a support pin 22 in the position of the back frame shown in FIG. Supported through. The entire link device 5 is also
secured in the position shown in the figure.

The support plate 21 and the support pin 22 are located below the pivot axis 6, about which the seat frame 3 and the back frame 4 can pivot relative to each other. Furthermore, since the support lamella 21 and the support pin 22 lie in the area of said pivot axis 6, the forces that are applied to the seat frame 3 in normal use are effectively applied to the seat frame 3 at the points where they are applied, i.e. in the pivot direction. It is received in the area of axis 6.

The support pin 22 of the link plate 13 rests on the support plate 21 only when the locking step 18 cooperates with the locking pawl 20 . In all other pivoting movements of the linkage 5, the support pin 22 moves over the support plate 21 without contact, so that all remaining adjustment positions can be obtained unhindered.

A groove 23 into which the support pin 22 is inserted is provided on the upper side of the thin support plate 21 .

In the embodiment shown in FIGS. 5 to 7, the structure of the link device 5 is basically the same as that in the previously described embodiments.

The embodiment shown in FIGS. 5 to 7 differs from the previously described embodiments in that the link plate 13 is not supported on the additional support pin 22, but on the support stay 11. be. A pin 24 is fixed to the support stay 11, and the locking step 1
8 acts and the back frame 4 assumes the position shown in FIG.
comes into contact with.

The embodiment shown in FIGS. 5 to 7 has the advantage that the support of the link plate 13 takes place directly on the link device 5. This means that an additional support plate 21 connected to the lower part 2 of the couch can be dispensed with.

As shown in FIG. 8, the support stay 11
A conically expanding head 25 is provided at the free end of the pin 24 fixed to the pin 24, and when the link plate end 13a extended to the pin 24 is supported by the head 25, Even if a load is applied in the lateral direction, the link plate end portion 13a is prevented from falling off the pin 24. A further design advantage is that good lateral guidance is also ensured in all other pivoting movements of the linkage 5, in which the link plate end 13a slides over the pin 24.

[Brief explanation of drawings]

Figure 1 is a cross-sectional view of the couch with the back frame in the sitting position, Figure 2 is a cross-sectional view of the couch with the seat frame lifted, and Figure 3 is with the back frame supine. FIG. 4 is a cross-sectional view showing the couch when swiveled into position; FIG.
5 is a cross-sectional view showing a couch according to another embodiment in a position corresponding to FIG. 1; FIG. 6 is a cross-sectional view showing the couch shown in FIG. 5 in a position corresponding to FIG. 2; 7 is a diagram showing the couch shown in FIG. 5 in a position corresponding to FIG. 4, and FIG. 8 is an enlarged view of a part of the link device of the couch shown in FIGS. 5 to 7. The figure shown in FIG. 9 is an enlarged view of a part of the link device of the couch shown in FIGS. 1 to 4. 1...Couch, 2...Lower part of couch, 3...
Seat frame, 4...Back frame, 5...Link device, 6...Swivel axis, 7, 8...Metal thin plate,
9... Connection plate, 10, 11... Support stay, 1
2, 14... Scissor-shaped lever, 13, 16... Link plate, 13a... Link plate end, 15... Intersection, 17... Bent part, 18, 19... Locking stage, 2
0... Locking claw, 21... Support thin plate, 22... Support pin, 23... Groove, 24... Pin, 25... Head.

Claims (1)

[Claims] 1. The back frame is on both sides, each having two different lengths.
A couch which is connected to the lower part of the couch so as to be able to stand up and fall down by a linkage device having two support stays, and in which a seat frame and a back frame are connected to each other so as to be able to pivot, in which case the pivot axis is located above the seat frame by approximately the thickness of the seat cushion, and the adjacent ends of the seat frame and the back frame have scissor-shaped levers that intersect at a point on each side of the couch; In those types in which a link plate is arranged at each end of the lever as a connection with the back frame or the seat frame, the back frame 4 is connected to the scissor-shaped lever 14 connected to the seat frame 3. The double locking steps 18, 19 and the locking pawl 20 attached to the seat can lock the seat at an intermediate position between the sitting position and the supine position, which has a flatter slope than the sitting position. It should be noted that a fixed position support for supporting the link plate 13 connected to the seat frame 3 in the intermediate position is arranged in the lower range of the pivot axis 6 between the seat frame 3 and the back frame 4. Features a couch. 2. The couch according to claim 1, wherein the thin support plate 21 fixed to the lower part 2 of the couch, which supports the support pin 22 fixed to the link plate 13, is provided as a positionally fixed bearing. 3. The couch according to claim 2, wherein a groove 23 is provided on the upper side of the thin support plate 21 in the contact range of the support pin 22. 4. A pin 24 fixed to the support stay 11 of the link device 5 that supports the link plate end 13a extending beyond the connection point with the scissor-shaped lever 12.
2. The couch according to claim 1, wherein the couch is provided as a positionally fixed support. 5. The couch according to claim 4, wherein the pin 24 is provided with a head 25. 6. The couch according to claim 5, wherein the head 25 is expanded into a conical shape starting from the pin 24.