EP1685778A2 - Chair - Google Patents

Abstract

The chair has a height adjustment for the seat at the carrier profile (2), with a locking mechanism (17) at the sliding seat mounting (4) to lock it in place at the required height level. The locking mechanism has a pawl (18), on a pivot axis (19) in the mounting, with a ratchet edge (20) which works together with an edge (21) at the seat carrier (6). The seat carrier swings on an axis (22) at the mounting, with an end cladding (23) flat against the carrier profile when the seat is folded down for sitting, and the pawl slips over the carrier edge to be held in place by a spring.

Description

The invention relates to a chair with at least one foot and a carrier profile on which a seat and optionally a backrest is arranged.

Chairs are available in a wide variety of designs and shapes. The present invention relates specifically to a chair whose seat is adjustable in height and / or seat depth. Furthermore, the invention relates to a chair that is collapsible.

From US-A-4 148 523, for example, a chair is known whose seat is adjustable along a support profile in height. To adjust the seat is raised, moved a connecting element along the carrier profile and then the seat lowered again, wherein it exerts a clamping action on the carrier profile.

This chair has the disadvantage that, for example, if the seat is accidentally raised, the height is easily adjusted by itself. The clamping action of the seat relative to the carrier profile depends essentially on the pressure exerted on the seat.

To prevent inadvertent adjustment of the height of the seat, height locks are provided on the seat. Such height locks are also known and widely used in a variety of forms and configurations.

For example, EP 1 020 138 A1 describes a seat in which a height and depth adjustment takes place by means of a tooth-engaging strip running on a chair frame and a holding device associated with the seat, on which a gear meshing with the tooth-engaging strip is seated and the gear turns into a rotary movement drivable drive means are arranged.

In order to determine the seat at a certain height, the holding device is associated with a clamping device which clamps the holding device on the chair frame.

Another height safety device is described in DE 195 19 739 A1. Here is a seat via a screw and a support arm connected to a support member. The support arm engages in a slot in the support element and can be moved vertically after loosening a fastening device to be subsequently fixed again by means of the fastening device.

In WO 99/00038 another chair is described, which is also a height and depth adjustable Seat board has, which is assigned a support element. A fall arrester is created here by the engagement of lugs on the support element with grooves in guide rails in side elements of the chair and the support element itself with grooves of a gear-like element on the back of the chair, with clamping elements provide for a determination of the seat.

A chair of the o. G. Art is known from US 6,017,089, the seat has a frame, which is associated with a clamping device. This clamping device consists of friction elements, which are assigned via bolts to the frame of the seat. The friction elements come with a rotation of the seat frame in the direction of a horizontal position of the seat frame in frictional contacts between the support profiles of the chair, whereby a clamping action is caused. This clamping effect is secured by a bolt to be inserted.

A disadvantage of the above-described height locks is, however, that they are usually directly connected to the seat or with the support profile of the seat. This creates a complicated structure of the height adjustment and thus also the height safety, which in turn leads to a more difficult handling.

Furthermore, with some of the above-mentioned fall arresters, securing the seat at the desired height is inadequate, since it relies only on a clamping effect between the seat and the support profile. Furthermore, the fall arrest does not work automatically.

In addition, especially in the use of, for example, screw-like elements jamming of the screw-like element od in the support profile. Like. May occur, which can lead to a possible injury to the user, among other things.

The present invention is therefore based on the object to develop a chair of the type mentioned above, which is provided with a height safety, which is very variable in their setting as well as in their handling and easy to use and yet a sufficient protection against adjustment offers the seat from its desired height.

To achieve this object, that the articulated mounting of the seat takes place near the top of the seat and the seat presses in the use position with a rear surface on the support profile, the height safety device has a locking pawl on the connecting element, which in this position of use of an edge of the Seat is engaged behind.

As a result of the arrangement, a covering present on the seat carrier is pressed against the carrier profile, as a result of which the position of the seat carrier is secured.

By attaching the height safety device to a connecting element, the handling thereof is substantially simplified. The seat only has to be brought to its desired height. Subsequently, the height safety device can be brought to the connecting element on the carrier profile in the corresponding position under the seat and fixed.

In a preferred embodiment, the height safety device has at least one clamping element which is guided in a slot in such a way that, as soon as the seat or seat carrier has reached its desired height, it exerts a clamping action, preferably in conjunction with the carrier profile, which avoids that the seat is brought out of its position without loosening the clamping element.

In a further embodiment, it is envisaged to provide even two clamping elements, wherein the second clamping element prevents the seat from being lifted.

Another feature of the invention, for which self-contained protection is sought, relates to the articulation of the carrier profile on at least one foot. This means that a collapsible chair is created. For this purpose, for example, be fixed at the foot of a bearing bracket, which enters into an articulated connection with the carrier profile via a hinge pin. At the same time, the bearing bracket also forms a stop for the carrier profile, as soon as it is in the position of use.

The operating position is secured by a latch, which engages with a locking lug in the carrier profile. This is done under the pressure of a spring, so that only when this pressure is released, a release of the latch and thus a release of the carrier profile.

Yet another idea of the present invention, for which self-protection is also desired, relates to the adjustability of the seat depth. Basically, it is thought to design the seat depth adjustable. This can happen once by a corresponding, for example, textile seat rolled up is and can be unrolled as desired by, for example, a roll.

Preferably, increasing or decreasing the seat depth occurs under the action of a telescopic element. For example, this could be a calculation extract, at least one toggle lever or a scissor element.

In another embodiment, it is envisaged to form the seat of several parts, wherein as desired the parts are pulled apart and supplemented by new parts. Again, the present invention, no limit should be set.

A particular inventive concept, for which also separately protection is sought, refers to the arrangement of an additional backrest, by adjusting the seat depth can also be changed.

Of course, it is thought to realize all the independent features in a chair for which also protection is sought. This produces a chair that is extremely variable in its settings. Furthermore, it can be easily folded and transported.

• Figur 1 eine perspektivische Ansicht eines erfindungsgemässen Stuhls;
• Figur 2 eine Seitenansicht eines Ausschnitts aus dem Stuhl gemäss Figur 1 im Bereich der Verbindung zwischen Trägerprofil und Fuss;
• Figur 3 einen Ausschnitt aus dem Stuhl entsprechend Figur 2, jedoch in einer anderen Gebrauchslage;
• Figur 4 einen Ausschnitt aus dem Stuhl gemäss Figur 1 im Bereich der Verbindung zwischen einem Sitz und einem Trägerprofil;
• Figur 5 den Ausschnitt gemäss Figur 4 in einer anderen Gebrauchslage;
• Figur 6 ein weiteres Ausführungsbeispiel eines Ausschnittes aus dem Stuhl gemäss Figur 1 ähnlich den Figuren 4 und 5 in unterschiedlichen Gebrauchslagen;
• Figur 7 einen Ausschnitt aus einem weiteren Ausführungsbeispiel des Stuhl gemäss Figur 1 ähnlich Figur 6;
• Figuren 8 - 13 perspektivische Ansichten von Ausführungsbeispielen von Sitzflächen, deren Tiefe veränderbar ist;
• Figur 14 perspektivische Ansichten von Möglichkeiten einer Rückenlehnenverstellung.

Further advantages, features and details of the invention will become apparent from the following description of preferred embodiments and from the drawing; this shows in

• Figure 1 is a perspective view of a chair according to the invention;
• Figure 2 is a side view of a section of the chair according to Figure 1 in the region of the connection between the carrier profile and foot;
• Figure 3 shows a detail of the chair according to Figure 2, but in a different position of use;
• FIG. 4 shows a detail of the chair according to FIG. 1 in the region of the connection between a seat and a carrier profile;
• FIG. 5 shows the detail according to FIG. 4 in a different position of use;
• Figure 6 shows another embodiment of a section of the chair according to Figure 1 similar to Figures 4 and 5 in different positions of use;
• Figure 7 shows a detail of a further embodiment of the chair according to Figure 1 similar to Figure 6;
• FIGS. 8-13 are perspective views of embodiments of seat surfaces whose depth is variable;
• Figure 14 perspective views of possibilities of a backrest adjustment.

According to FIG. 1, a chair P according to the invention has two feet 1.1 and 1.2 which are each connected to a carrier profile 2.1 and 2.2. The carrier profiles 2.1 and 2.2 take on a backrest 3 between them.

In each case via a connecting element 4.1 bzw.4.2 a seat 5 is connected to the carrier profiles 2.1 and 2.2. If necessary, this connection is made via corresponding seat supports 6.

It can be seen in FIGS. 2 and 3 that a carrier profile 2 is connected to a foot 1 via an articulated connection 7. In this case, the articulated connection 7 preferably has two bearing lugs 8 arranged one behind the other, wherein the bearing lugs 8 are connected to the carrier profile 2 via a hinge pin 9. The carrier profile 2 can rotate about the hinge pin 9.

However, the rotational movement of the carrier profile 2 relative to the bearing plate 8 is limited by a fold 10, which forms a stop for the carrier profile 2.

Between the two bearing plates 8, a latch 11 is provided, which engages in the position of use according to Figure 2 with a locking lug 12 in the support section 2 and this determines in the position of use.

The locking lug 12 can be brought out of engagement with the carrier profile 2 by being pressed on a lever 13 and thereby the latch 11 against the pressure of a spring 14th is brought out of rest position, as shown in Figure 3. In this case, the latch 11 rotates about an axis 15th

For locking the carrier profile 2 is pivoted about the hinge pin 9, wherein a control edge 16 slides on the latch 11 and the locking lug 12 passes over until the locking lug moves under the pressure of the spring 14 in the support section 2.

According to FIGS. 4-7, the seat 5 or its seat carrier 6 should be able to be displaced along the carrier profile 2 and be fixed at a desired height. For this purpose, the connection element 4 is associated with a height safety device 17. This height safety device 17 has an adjusting pawl 18, which is mounted pivotably about a pivot axis 19 in the connecting element 4.

The adjusting pawl 18 has a latching edge 20 which cooperates with an edge 21 on the seat support 6.

The seat support 6 is arranged pivotably about a further pivot axis 22 on the connecting element 4. The pivot axis 22 is arranged so that a seat support 6 associated coating 23 in the seat position of the seat support 6 (Figure 5) rests flat on the support section 2, wherein at the same time the edge 21 has passed over the locking edge 20 of the actuating pawl 18 and the adjusting pawl 18 below the pressure of a spring 24, the edge 21 has overlapped. In this way, on the one hand, the coating 23 is pressed onto the surface of the carrier profile 2 and held on the other by the adjusting pawl 18 in this pressure position, so that a displacement of the connecting element 4 along the carrier profile 2 only after releasing the adjusting pawl 18 is possible.

FIGS. 6a to 6c show a further exemplary embodiment of a height safety device 17.1. This height safety device 17.1 has a pivoting lever 25, which is rotatably coupled about an axis of rotation 26 with the connecting element 4. With this pivot lever 25, a pinch roller 27 can be moved in a link 28. The gate 28 is formed as a curved slot in the clear width of the carrier profile 2 protrudes something.

When the pinch roller 27 according to FIG. 6a is released, the connecting element 4 can be moved along the carrier profile 2. Once the desired height has been reached for the seat, the pivot lever 25 is rotated about the axis of rotation 26 so that the pinch roller 27 reaches the area of the carrier profile 2. As a result, a clamping effect is achieved between link 28, pinch roller 27 and carrier profile 2, as indicated in Figure 6b.

Now, if the seat support 6 is pivoted about its pivot axis 22, as shown in Figure 6c, the coating 23 strikes the carrier profile 2, wherein, if desired, the coating 23 against the surface of the carrier profile 2 can still be made so, that the connecting element 4 is slightly offset downwards. As a result, the pinch roller 27 is retracted even further into the clamping area between the link 28 and the surface of the carrier profile 2, so that a secure fixing takes place.

According to the exemplary embodiment according to FIG. 7, two pivoting levers 25 and 25.1 are to be provided on the connecting element 4. Both a backdrop 28 and 28.1 and a pinch roller 27 and 27.1 assigned. The pinch roller 27.1 here has the task, a displacement of the connecting element 4 in the opposite direction, ie to prevent the support section 2 upwards. In this Embodiment thus a displacement of the connecting element is avoided both downwards and upwards.

Another part of the present invention relates to the possibility of seat depth adjustment. In FIGS. 8-13, possibilities are schematically indicated how a seat depth can be adjusted.

According to FIG. 8, a seat surface 30 surrounds a roller 31, wherein, for example, the seat surface 30 may consist of a textile material. If, for example, pulled against the force of a tension element on the seat surface 30, so far a part of the seat located in the seat is pulled out and can serve as a seat.

According to FIG. 9, the seat surface 30 could also be wound on one roller 31.1 at one end, whereby this roller could be under a prestress, whereby the seat surface 30 is kept stretched.

According to FIG. 10, a seating surface 30 (not shown in greater detail), for example according to the exemplary embodiment according to FIG. 9, could be underpinned by a calculation extract 32. The arithmetic unit 32 is designed such that individual rakes can be moved telescopically with respect to other rakes.

According to Figures 11 and 12, a similar extension of the seat 30 by means of toggle 33 and scissors 34 is achieved.

In a simple embodiment of the invention according to Figure 13, it is sufficient if the seat of several Seat surface elements 35.1 to 35.2 is made, which may be connected to each other.

According to Figure 14 further chairs are shown, in which a further backrest 36 is arranged to a normal backrest. This additional backrest 36 is adjustable along the seat 5, so that a seat depth of a person can be adjusted. This can be done either by the backrest 36 is inserted in arranged at different positions receptacles 37. It is also thought of a stepless adjustment, wherein in the seat, a corresponding slot-like recess 38 is formed. A corresponding mechanism for adjusting the backrest 36 is not shown here.

Claims (19)

1. chair with at least one foot (1.1, 1.2) and a carrier profile (29, on which a seat (5) and optionally a backrest (3) is arranged,
characterized,
that the distance between a front edge of the seat (5) relative to the carrier profile (2) is variable. 2. Chair with at least one foot (1.1, 1.2) and a carrier profile (2) on which a seat (5) and optionally a backrest (3) is arranged, characterized in that the carrier profile (2) hinged to the foot (2) 1.1, 1.2) connected and can be fixed in position of use. 3. Chair according to claim 1 or 2, characterized in that between the carrier profile (2) and the front edge of the seat at least one telescopic element (32, 33, 34) is provided. 4. Chair according to at least one of claims 1 to 3, characterized in that the telescopic element is a calculation extract (32). 5. Chair according to claim 4, characterized in that the telescopic element has at least one toggle lever (33). 6. Chair according to claim 3, characterized in that the telescopic element has at least one scissor element (34). 7. Chair according to at least one of claims 3-6, characterized in that the seat (5) has a seat surface (30) which is at least partially rollable. 8. Chair according to at least one of claims 3-7, characterized in that the seat has a seat which consists of several complementary parts (35.1-35.3). 10. Chair according to claim 9, characterized in that bearing tab (8) and carrier profile (2) of a hinge pin (9) are interspersed. 11. Chair according to claim 9 or 10, characterized in that the bearing lug (8) forms a stop (10) for the carrier profile (2) in the position of use. 12. Chair according to at least one of claims 2 - 11, characterized in that between the carrier profile (2) and foot (1.1, 1.2) is provided a latch (11) for fixing the carrier profile (2) in the use position. 13. Chair according to claim 13, characterized in that the detent pawl (11) is articulated to the bearing bracket (8) and engages with a latching lug (12) in the carrier profile (2). 14. Chair according to claim 13, characterized in that the latching pawl (11) on the other hand, the latching lug (12) by a spring (14) is attacked. 15. Chair according to at least one of claims 1-14, characterized in that the height safety device (17, 17.1) acts in both directions. 16. Chair according to claim 15, characterized in that the clamping elements (27. 27.1) in each case in a link (28, 28.1) are arranged, wherein the carrier profile (2) at least partially in the inside width of the scenes (28, 28.1) engages and thereby the two clamping elements (27, 27.1) separated from each other. 17 chair with at least one foot (1.1, 1.2) and a support profile (2) on which a seat and optionally a backrest (3) is arranged, characterized in that the backrest (36) relative to the seat (5) horizontally adjustable is. 18. Chair according to claim 17, characterized in that in addition to the adjustable backrest (36) with the carrier profile (2) connected backrest (3) is provided. 19. Chair according to claim 17 or 18, characterized in that the adjustment of the backrest (36) takes place continuously. 20. Chair according to claim 17 or 18, characterized in that for adjusting the backrest (36) a perforated grid with recesses (37) is provided.

Images