JPH11172871A - Joint arm sunshade with gas spring - Google Patents

Abstract

PROBLEM TO BE SOLVED: To attain the advantageous winding behavior of a sunshade fabric at the ratio of optimum force at the time of delivery and drawing-in and in high stability to a wind. SOLUTION: The joint arm sunshade has at least two joint arms, each joint arm contains an internal joint arm section and an external joint arm section, these sections are combined mutually through a swivel joint, the gas spring is arranged between the internal joint arm section and the external joint arm section, and the gas spring works in the directions of positions extended to the joint arms. Elastic force in the delivery direction (a characteristic curve section) differs from that in the drawing-in direction (the characteristic curve section) in the gas spring 17, particularly the gas spring 17 has force, a path and a characteristic curve lower than those in the drawing-in direction.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a joint arm shade (awning, awning) having at least two joint arms. Each joint arm includes an inner joint arm portion and an outer joint arm portion, which are connected to each other via a pivot joint. A gas spring is arranged between the inner joint arm part and the outer joint arm part for acting on the joint arm towards the extended position. Such a joint arm shade is described, for example, in DE 2961253.
2U1 (German Utility Model No. 29612532)
Is known.

[0002]

2. Description of the Related Art In the case of a joint arm shade of the type in question, the shade is provided by a gas spring during the lowering of the shade and in the extension direction. The higher the pull-out tension to which the acting gravitational component is added, the easier it is to pay out.

Conversely, when winding the shade against this pull-out tension and against this gravitational component, a force is provided which prevents winding of the shade fabric or fabric. Based on this, the present invention provides a joint arm date with a gas spring which achieves an advantageous wrapping behavior of the shading fabric with an optimum force ratio during extension and retraction and high stability against wind. It is an object to form an obstacle.

[0004]

SUMMARY OF THE INVENTION This object is achieved according to the invention in that the force, path, etc., in which the resilience in the dispensing direction is different from that in the retraction direction, in particular lower.
The problem is solved by mounting a gas spring having a characteristic curve (Kraft-Weg-Kennlinie).

Starting from a fully extended shade, the pushing force is firstly very high, so that on the one hand very high stability against the wind and on the other hand an optimum winding method is achieved in this aspect. It is advantageous if the characteristic curve is formed. The pushing force gradually decreases in accordance with a certain intake course or process.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below based on preferred embodiments with reference to the drawings. The shade shown in the drawing has a support device 1 which is provided with a winding shaft 4 rotatably mounted on bearing plates 2, 3 and which is to be fixed to a house wall or the like. As is known, this winding shaft can be driven to rotate, and more specifically, FIG.
Can be driven to rotate by a transmission 5 with an automatic brake according to the description in FIG. The transmission 5 is also operable by means of a removable hook crank rod 6. Of course, instead of the transmission 5 and the crank rod 6, an electric motor drive (as is commonly known),
A belt transmission or the like can also be used. Furthermore, a support pipe 7 having a square cross section, in particular a square cross section, is mounted as part of the support device 1 between the bearing plates 2 and 3. A so-called scissor-shaped joint arm 9 is attached to the pipe by a device 8 for supporting and adjusting the inclination angle, respectively. Each of these joint arms 9 is provided with a pivot or pivot joint 10 which is divided at the center and has a vertical axis. The joint arms 9 are each connected to a corresponding device 8 by a pivoting or pivoting joint 11 of the same type, and (not shown in the drawing) to a dropping or dropout pipe 12 by a corresponding pivoting or pivoting joint. As a result, the dropping pipe 12 can be displaced in a plane common to the winding shaft 4, but cannot move in any direction perpendicular to this plane.

A rectangular shading material 1 is wound around a winding shaft 4.
The shade 3 is fixed and the shade can be rotated so as to be unfolded to or from the shaft 4 by the previously described rotation of the shaft 4. The shade fabric 13 is further fixed to the dropping pipe 12 in a generally known manner. A tufted decoration 14 hanging downward is connected to the drop pipe 12.

The joint arm 9 has an inner joint arm part 15 and an outer joint arm part 16, each of which has a gas spring 17 (illustrated diagrammatically only in the figures) pivoting between the two joint arm parts 15, 16. It is arranged so as to bridge the joint 10.

The gas spring 17 used is obtained by converting the force / path / characteristic curve shown in FIG.
The pushing force at the time of feeding corresponding to 8 is smaller than the force at the time of drawing corresponding to the characteristic curve portion 19 in FIG.

[0010] The characteristic curve begins with a fully extended position indicated by the point 20 where the insertion force is first very high and only after a given retraction path section does the two stages 2
Decreased to a lower level in 1 and 22 and finally reached point 2
It is formed so that it is lowered at 3 until it is completely retracted.

[Brief description of the drawings]

1 is a schematic perspective view of a joint arm shade provided with a gas spring.

FIG. 2 shows the path, force, and the like of an attachable gas spring according to the present invention.
It is an example of a characteristic curve.

[Explanation of symbols]

 4 Winding shaft 9 Joint arm 12 Dropout pipe 13 Sunshade

Claims (2)

[Claims] 1. A joint arm shade with at least two joint arms, each joint arm including an inner joint arm part and an outer joint arm part, which parts are connected to one another via a swivel joint. A gas spring disposed between the inner joint arm portion and the outer joint arm portion, wherein the gas spring acts on the joint arm in the direction of the extended position; Has a force / path / characteristic curve in which the elasticity in the feeding direction (characteristic curve portion 18) is different from that in the retracting direction (characteristic curve portion 19), and is particularly lower than that. A joint arm awning characterized by that. 2. The joint arm shade according to claim 1, wherein, starting from a state in which the shade is sufficiently extended, the pushing force is first increased and then gradually reduced.