Device for adjusting the incline of back rests

Abstract

The invention relates to a device for adjusting the incline of back rests, especially of camping chairs and lawn chairs, wherein the locking action of the back rest is realized by an edge wedging mechanism. It is an object of the invention to propose a device for adjusting the incline of the backrest which makes a continuous adjustment of the incline possible in connection with a simple construction. The object of the invention is solved in that the locking action is released by lifting at least one arm rest (5).

Description

DESCRIPTION

[0001] The invention relates to a device for adjusting the incline of back rests, especially for camping chairs and lawn chairs, wherein the locking action of the back rest is realized by an edge wedging mechanism.

[0002] In known camping furniture the incline of the back rest is adjusted in that both arm rests are lifted and then moved to the back or to the front. The desired position can then be secured in that the arm rests are lowered again and locked in a catch integrated in the arm rests. The positioning is not continuous in this arrangement. The number of positioning possibilities depends on the number of catches in the arm rest.

[0003] Moreover, a continuous adjusting device, based on the principle of edge wedging, is known. A locking rod which is fixedly connected with the arm rest is clamped by pulling or pushing the arm rest to the front by means of a movable metal plate. If it is desired to incline the back rest to the rear, it is required to release the wedging action in order to allow a movement to the rear. In the known device this is realized by actuating a lever mechanism which changes the position of the metal plate such that the free movement of the back rest to the rear is possible.

[0004] The construction of this mechanism is very complex.

[0005] The object of the invention is to propose a device for adjusting the incline of back rests which makes a continuous adjustment of the incline possible in connection with a simple construction.

[0006] The object of the invention is solved in that the locking action is released by lifting at least one of the arm rests.

[0007] With this construction it is possible to completely eliminate the complex lever mechanism. A further great advantage of the invention is to be seen in that the function is much easier to understand for the customer because he is normally used to catches integrated in the arm rests of lawn chairs. Accordingly, it is possible for the customer to use a lawn chair which is furnished with the device for adjusting the incline of back rests as claimed in the instant patent without needing further explanations.

[0008] Advantageous further developments are described in the dependent claims.

[0009] Embodiments of the invention will be explained in the following with the aid of the drawings.

[0010] It is shown in:

[0011] FIG. 1 a schematic basic illustration of the straight metal plate;

[0012] FIG. 2 a schematic basic illustration with curved metal plate;

[0013] FIG. 3 a schematic basic illustration of the position of the release bolt;

[0014] FIG. 4 a schematic basic illustration of the position of the metal plate in the slide;

[0015] FIG. 5 a schematic basic illustration in a front view;

[0016] FIG. 6 an illustration of the device in the disassembled state; and

[0017] FIG. 7 an illustration of the device in the assembled stage.

[0018] FIG. 1 shows a locking rod 1 which is guided through a bore 2 (see FIG. 6) in a metal plate 3. The reference numeral 4 indicates the initial position. When the locking rod 1 is moved by pulling or pushing an arm rest 5 (see FIGS. 6, 7) in the direction of arrow 6, the metal plate 3, because of the frictional connection between the metal plate 3 and the locking rod 1, is pivoted into the clamping position 7. This results in an edge wedging action on the edges 8, 9. A further movement in the direction of arrow 6 is not possible. A movement of the locking rod 1 counter to the direction of arrow 6 can be performed at any time because the metal plate 3 is then returned into its initial position 4 so that the bore 2 and the locking rod 1 are aligned again.

[0019] FIG. 2 corresponds to FIG. 1, with the exception that the metal plate 3 in this representation is comprised of two planes 10, 11 wherein one plane is bent relative to the other plane by 25°.

[0020] In comparison to FIG. 2, FIG. 3 shows additionally a release bolt 12. When the arm rest 5 is lifted (see FIGS. 6, 7), it moves from the lower end of the plane 10 of the metal plate 3 in the upward direction and presses the metal plate 3 to the left until the bore 2 (see FIG. 6) and the locking rod 1 are aligned. Now the locking rod 1 can be moved easily in the direction of arrow 6; when the arm rest 5 (see FIGS. 6, 7) is lowered, the release bolt 12 is again moved downwardly so that again an edge wedging action of the metal plate on the edges 8, 9 occurs.

[0021] FIG. 4 shows a schematic basic illustration of the position of the metal plate in a slide 13. In this representation it should be noted, in particular, that the locking rod 1 is guided through further guides 14, 15 in the slide 13.

[0022] FIG. 5 shows in a front view a possible position of the release bolt 12 relative to the metal plate 3. The force of a spring 16 acts on the metal plate in the direction of arrow 6. It can be clearly seen that the release bolt 12 is guided in two grooves 17, 18 of the arm rest 5 (see FIGS. 6, 7). The slide 13 which is guided by the release bolt 12 in these grooves 17, 18 is not shown in this schematic representation.

[0023] In FIGS. 6 and 7 the entire device is illustrated in a perspective view. A locking rod 1 connected to the arm rest 5 is guided through a bore 2 in a metal plate 3 which is spring-mounted on a slide 13. In addition, two further guides 14, 15 are provided on the slide 13. In the slide 13 a release bolt 12 is supported in a vertical cutout 19. In addition, the release bolt 12 has the object to guide the slide 13 in the grooves 17 and 18 of the arm rest 5. The legs of the chair (not illustrated) are connected to the slide 13. On the top side 20 of the arm rest 5 the slide is secured against sliding out.

[0024] The back rest position and thus the locking rod are locked in that the locking rod 1 is moved by pulling or pushing the arm rest 5 in the direction of arrow 6 because then the metal plate 3 is wedged on the locking rod 1. When it is now desired to release the locking action, the bore 2 in the metal plate 3 must be brought into exact alignment with the locking rod 1 so that the slide 13, on which the chair legs are fastened, can slide to the front or the back. A sliding movement counter to the direction of arrow 6 is possible without problems because the metal plate 3, which is spring mounted at a slant, automatically stands up so that the bore 2 and the locking rod 1 are aligned. If it is desired to move the slide 13 in the direction of arrow 6, the metal plate 3 must be kept in the upright position in order to prevent clamping on the locking rod 1. This is achieved by lifting the arm rest 5 wherein the release bolt 12 can be moved in the vertical cutout 19 in the upward direction along the plane 11 of the metal plate 3. The metal plate 3 is then erected against the force of the spring 16 so that the bore 2 and the locking rod 1 are aligned. Now a movement in the direction of arrow 6 can take place with the arm rests 5 being lifted upwardly. By releasing the arm rest 5 in the downward direction once the desired incline position has been reached, the release bolt 12 is also moved downwardly so that the metal plate 3 is again clamped by the locking rod 1.

List of Reference Numerals

[0025] 1 locking rod

[0026] 2 bore

[0027] 3 metal plate

[0028] 4 initial position

[0029] 5 arm rest

[0030] 6 direction of arrow

[0031] 7 clamping position

[0032] 8 edge

[0033] 9 edge

[0034] 10 upper plane

[0035] 11 lower plane

[0036] 12 release bolt

[0037] 13 slide

[0038] 14 guide

[0039] 15 guide

[0040] 16 spring

[0041] 17 groove

[0042] 18 groove

[0043] 19 vertical cutout

[0044] 20 top side

Claims

1. A device for adjusting the incline of back rests, especially for camping chairs and lawn chairs, wherein the locking action of the back rest is realized by an edge wedging mechanism, characterized in that the locking action is released by lifting at least one of the arm rests (5).

2. The device according to

claim 1, characterized in that a locking rod (1) connected to one of the arm rests (5) is guided through a bore (2) in a metal plate (3) which is spring-mounted on a slide (13).

3. The device according to

claim 2, characterized in that the metal plate (3) has two planes (10, 11) which are positioned at an angle, preferably of 5° to 25°, to one another.

4. The device according to

claim 2 or

3, characterized in that a release bolt (12) is integrated in the slide (13) via which the slide (13) is guided in a groove (17, 18) of the arm rest (5).

5. The device according to

claim 4, characterized in that the release bolt (12) is moved upwardly along the lower slanted plane (11) of the plate by lifting at least one arm rest (5), so that the metal plate (3) stands up in a direction against the spring force so that the bore (2) in the metal plate (3) is aligned with the locking rod (1).

6. The device according to

claim 4 or

5, characterized in that the release bolt (12) is vertically guided in the slide (13).

7. The device according to one of the

claims 2 to

6, characterized in that additional guides (14, 15) for the locking rod (1) are integrated in the slide (13).

8. The device according to one of the

claims 2 to

7, characterized in that the chair legs or lawn chair legs are connected to the slide (13).

9. The device according to one of the

claims 2 to

8, characterized in that the slide (13) is secured on the top side (20) of the arm rest (5) against sliding out.

10. The device according to one of the proceeding claims, characterized in that the arm rest (5) is formed with a U-shaped cross-section.