DE8900802U1 - Folding chair - Google Patents

Description

Folding chair

The innovation concerns a folding chair with a front and rear pair of support legs and with a seat element that is provided with joints in the area of its front end and in the area of its rear end, with a leg rest at the front end and a backrest at the rear end being pivotably attached, as well as with surface arranged connecting struts, which are connected in the area of their front end to the leg rest and in the area of their rear end to the backrest, whereby the seat element and the connecting strut are essentially parallel in the standing position of the folding chair parallel to each other and the four hinge points form an adjustable square so that the swivel movements of the backrest and leg rest are coupled.

Although the term "connecting struts" is used in the plural above, it should be noted that this definition should also be understood to mean just one connecting strut or a coupled pair of connecting struts.

It is already known from the Reich Patent Specification 14 597 that a leg rest and backrest provided on an armchair or chair can be supported by a strut located below the seat of the armchair. shape to be connected to one another in a joint-movable manner so that an adjustment of the backrest inclination results in the leg rest being pivoted up or down accordingly.

3g The recliner known from the European patent application 172 116 also has a backrest that can be adjusted synchronously by connecting struts and

Leg rest and is also foldable. Here, a change in the chair backrest angle is made via a pin that is attached to a lever-like extension arm located at the lower end of the backrest. provided and is slidably guided in a slot-like guide in the strut, leads to a change in the leg rest position.

Also known from this publication is a device which consists of a locking device located in an armrest connected to the backrest in conjunction with a corresponding locking lug on a support leg and enables the desired backrest position to be set.

f15 In this design of an armchair or chair,

&eeacgr;; adjustment of backrest and leg rest via

ij a connecting strut ensures a uniform

|i timely adjustability of the seat position is

not attainable or only to a negligible extent. 20

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The innovation aims to enable synchronous adjustment of the backrest and leg rest positions while simultaneously adjusting the seat position.

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This task is solved in accordance with the innovation by § the connecting struts on both sides of the

; folding chair with one support leg each of the front and

of the rear support leg pair and that ^r: 3Q the seat element between the support legs in the frame of the

Articulated point quadrilateral can be moved freely back and forth.

The pairs of support legs can be folded relative to each other around a common hinge point: the connecting struts are preferably connected to the front

Support legs can be pivoted and connected to the rear support legs via a pivot pin sliding guide.

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tied, which makes the folding chair foldable,

Seat element, i.e. the part that supports the seat surface, as well as the leg rest and backrest, which are pivotably connected to one another at hinge points in the area of the front and rear seat edges, together form the body support, which is connected to the support structure formed by pairs of support legs and connecting struts. tion in the area of the front support legs in joints movably connected to the leg rest &tgr; dt. In the area of the rear support legs, the connection between the body rest and the support structure consists of a design as a groove-rolling bead connection that can be moved apart. connection between the lower end of the backrest and the rear ends of the connecting struts. The lower end of the backrest is designed as a rolling curve that can roll on a compatible surface in the rear area of the connecting struts. This design of the folding chair ensures that its entire body support is adjustable and movable relative to the support structure.

The desired position of the body support is fixed by a locking mechanism, through which an armrest, which is connected to the backrest in a pivoting manner, snaps into place on the upper end of a support leg.

Due to the innovative arrangement of the movement mechanism, the forces of the body weight acting on the entire body support are distributed in such a way that an approximate equilibrium position is achieved in every sitting position and only a small amount of force is required on the seat element, armrest, backrest and leg rest _etc. to change the position of use of the folding chair.

An example of a folding chair in accordance with the innovation is shown in the drawing and is described in more detail below. It shows in detail:

Figure 1 is a schematic side view of an armchair according to the innovation, with the backrest in an almost vertical position and the leg rest folded down, 10

Figure 2 shows an armchair according to Figure 1, but pivoted into a reclining position,

Figure 3 shows the side view of an armchair according to the innovation in almost folded state.

The example shown in Figures 1-3 shows a schematic representation of the structure and the functioning of a folding armchair. The folding armchair essentially consists of a support structure and a body support. The body support consists of a seat element 3, a backrest 14 and a leg rest 15. The backrest is in the area of the rear seat element edge at the articulation points 18, 18', the leg rest in the area of the front seat element edge at the articulation points 16, 16' connected to the seat element.

The support structure consists of a pair of support legs 2, 2', in which the front and rear support legs are hingedly connected to one another at an upper hinge point 5, and at least one connecting strut 1. In the present case, two connecting struts 1, 1' are each pivotally connected to the front support leg (2) at a hinge point 6, while they are connected to the rear support leg (2") via a pivot pin slide in order to ensure that the chair can be folded up.

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- 5 -guide 20, 20* are connected.

The elements 3, 14 and 15 of the body support are connected to the support structure in such a way that the Leg rest 15 below the articulation point 16 to the seat surface in two further articulation points 17 is connected to one end of the connecting struts 1. The other end of the connecting struts has a surface 13 which, together with the lower ends of the Backrest 14 forms a groove-rolling bead connection 11. The backrest is widened and curved in this area 12 in such a way that, resting on the corresponding surfaces 13 of the connecting struts, it enables the backrest to be pivoted. light.

This structural design ensures that the body support is movable relative to the support structure, whereby in the area consisting of the articulation points 16, 17, 18/ 19 formed rectangle the articulation points 17, 19 in Sitting position, the articulation points 16, 18 can be moved by applying force to the seat element, leg rest and backrest of the relative to the fixed articulation points. In order to achieve the desired backrest inclination and, in conjunction with this, to be able to set a corresponding leg rest position via a corresponding seat element displacement, the folding chair is provided with at least one armrest 8 which is pivotably connected to the backrest and which can be adjusted in its

OQ bottom has a locking device 10 which in

a corresponding locking lug 9, which is provided at an upper end of one of the support legs 2, 2', is designed to be latchable.

2g Figure 2 shows a recliner according to the innovation in Lying position with angled backrest and unfolded leg rest. Here the shift of the

seat element and the articulation points on it compared to the articulation points on the connecting struts, i.e. the displacement within the» articulation parallelogram.

Figure 3 shows a folding chair in an almost folded state. The folding chair is designed in such a way that it can be folded without assembly so that it can be placed free-standing on the ends of the support legs when folded and requires a minimum of space for storage.

In the position according to Figure 3, the pin 20' slides from its rest position and into the guide 20 and downwards. The armrest 8 is released from its locking position. The two pairs of legs 2, 2' are pivoted against each other. The groove-rolling bead connection 11, 11' also separates from each other. The footrest 15 is brought into alignment with the seat surface 3 by adjusting the articulation points accordingly, while the connecting strut 1 lies closely against the seat surface 3.

The aforementioned movements and positions result in the folding chair being laid very flat, which essentially contributes to its utility value.

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Claims (6)

Protection claims: 1. Folding chair with a front and rear pair of support legs and with a seat element which is provided with joints in the area of its front end and in the area of its rear end, with a leg rest at the front end and a backrest at the rear end being pivotably attached, as well as with connecting struts arranged below the seat, which are connected to the leg rest at the area of their front end and to the backrest at the area of their rear end, with the seat element and the connecting strut lying essentially parallel to one another in the standing position of the folding chair and the four articulation points forming an adjustable square, so that the pivoting movements ² ^ of the backrest and leg rest are coupled, characterized in that the connecting strut (1) is connected on each of the two sides of the folding chair to a support leg (2, 2') of the front and rear support leg pairs and that the seat element (3) can be moved freely forwards and backwards between the support legs within the hinge point quadrilateral (4). 2. Folding chair according to claim 1, characterized in that the support legs (2, 2') can be folded relative to one another about a common hinge point (5) and that the connecting struts (1) are pivotable (6) with one, preferably the front, pair of support legs (2) and are connected to the other pair of support legs (2'), preferably the rear ones, via a pivot pin sliding guide (20, 20'). * »ft· · ·
• » &psgr;&psgr; -- &Agr;2- - • * I I ■ · 3. Folding chair according to claims 1 or 2, characterized in that the backrest (14) is pivotally connected to at least one armrest (8), which in turn rests in a latchable manner (10) on an upper end of a support leg (9). 4. Folding chair according to claims 1 or 2, characterized in that at least one of the articulation points belonging to the parallelogram is lockable. 5. Folding chair according to one of claims 1 to 4, characterized in that the articulated connections between the rear end of the backrest and the rear ends of the connecting struts are designed as extendible Groove-roll bead connection (11, II ¹ ). 6. Folding chair according to one of the preceding claims, characterized in that in addition to the roll-bead connection, a rolling curve surrounds the lower end of the backrest (12) which can be rolled on a compatible surface (13) of the connecting struts. [