DE202015003452U1 - Postitioning mechanism for a screen - Google Patents

Abstract

Positioning mechanism for a screen with a mast (6), at one end of which a crown (1) is arranged, with which roof bars (2) are articulated, and a slide (5) for opening and closing the screen, characterized in that on the roof bars (2) support struts (3) are articulated, which are articulated at its other end to a hub (4) which is movably connected to the slide (5), wherein the hub (4) has a latching hook (9) which is tiltably mounted on a shaft (10) extending transversely to the mast (6), and whose upper end (9.1) is tensioned in the direction of the mast by means of a spring (11), so that the upper end (9.1) reaches upon reaching the opening position of the positioning mechanism in the locking groove (8.1) engages a positioning element (8) which is fixed to the mast (6), and wherein the latching hook (9) has a lower end (9.2), which upon displacement of the slide ( 5) in the direction of Mastfußes (7) arranged in the slide (5) projection (5.1) acts so that the upper end (9.1) of the latching hook (9) from the locking groove (8.1) is moved out.

Description

The present invention relates to a positioning mechanism for a screen, in particular a sunshade according to the preamble of claim 1.

Umbrellas usually have a mast, at one end of which a crown is arranged. Articulately connected to the crown are roof bars, on which support struts are articulated, which in turn are articulated to a slide. By moving the slider, the screen is opened or closed. By a positioning mechanism, the screen is held in the open position.

Positioning mechanisms for screens are known from the prior art in a variety of configurations. These consist mostly of a arranged inside the mast spring mechanism which is locked in the open position of the screen with the slide. Such constructions are for example in the U.S. Patent 6,571,813 B2 or the German Utility Model DE 202008004468 U1 shown. A disadvantage of the known positioning mechanisms, on the one hand, that openings, such as slot grooves must be provided in the mast, through which the spring mechanism can be positioned within the mast and later pass for the purpose of locking. These breakthroughs in the material of the mast cause a reduced stability of the mast, which is particularly undesirable when it is the umbrella to a parasol with a larger diameter of the canopy, which can affect not inconsiderable wind forces. Thus, the mast can absorb higher wind forces even in the known solutions, the wall thickness of the mast must be increased accordingly in the prior art. This in turn leads to the disadvantage of a larger material usage and weight of the mast. On the other hand, the assembly of the known positioning mechanisms is relatively expensive. In the case of a defect, such as a spring break, a repair is not possible because the defective spring mechanism can not be removed from the inside of the mast.

The technical problem underlying the present invention is to provide a positioning mechanism for a screen, which is easy to assemble and operate, and for the separate breakthroughs of the mast are not required.

This technical problem is solved by a positioning mechanism having the characterizing features of claim 1.

According to the invention, a positioning element is fixedly arranged on the mast. The struts of the roof bars are hinged to a hub which is movably connected to a slider which can be moved on the mast. At the hub, a locking device is arranged. This consists of at least one latching hook, which is mounted tiltably on an axis. The upper end of the latching hook is stretched by a spring in the direction of the mast. The positioning element has a latching groove in which the upper end of the latching hook is latched upon reaching the opening position of the positioning mechanism. To release the locking and closing of the screen, the slider is moved away from the crown, wherein a projection on the inside of the slider on the lower end of the latching hook acts so that the upper end of the latching hook moves away from the mast from the locking groove of the positioning element and the latching is lifted.

The positioning element may be formed in a preferred embodiment as an annular sleeve with a circumferential locking groove. However, it is also possible to arrange as a positioning element one or more suitable profiles on the mast, such as a C-profile.

It is advantageous to provide on the side facing the slider of the positioning element an inclined surface on which the upper end of the latching hook can slide until it reaches the locking groove.

In a preferred embodiment, two ribs may be formed on the latching hook, between which the spring is positioned. It is advantageous to store the spring on the same shaft on which the latching hook is mounted.

The fixing of the positioning element on the mast can be done by means known in the art. In a preferred embodiment, at least one recess is provided in the mast at the desired position of the positioning element, in which engages at least one retaining lug of the positioning element.

Further features and advantages of the present invention will become apparent from the following description of a preferred embodiment with reference to the accompanying drawings. Show in it

1 the overall view of a umbrella frame according to the invention;

2 a perspective view of the frame;

3 the positioning mechanism in the latched position;

4 the positioning mechanism in the unlocked position;

5 a preferred embodiment of the latching hook.

The in the 1 and 2 Shown screen has a mast 6 with a mast foot 7 , At the top of the mast 6 is a crown 1 arranged. With this are roof bars 2 articulated. On the roof bars 2 are struts 3 hinged, which in turn at the hub 4 are articulated. The hub 4 is with the slider 5 so connected that hub 4 and slider 5 are movable relative to each other. hub 4 and slider 5 can on the mast 6 be moved. At the mast 6 is a positioning element 8th fixed in the form of an annular sleeve.

3 shows the positioning mechanism according to the invention in the latched position. The latching hook 9 is on a wave 10 stored, which is tangential to the mast 6 runs. The latching hook 9 is by a spring 11 so biased that the upper end 9.1 of the latching hook 9 in the direction of the mast 6 is pressed. The positioning element 8th has below the locking groove 8.1 an oblique surface 8.2 , The upper end 9.1 of the latching hook 9 engages in the locking groove 8.1 of the positioning element 8th a, causing a downward movement of hub 4 and slider 5 in the direction of the mast foot 7 is prevented.

To open the screen and lock in the open position slides 5 and hub 4 in the direction of the crown 1 pushed. That by the spring 11 preloaded upper end 9.1 of the latching hook 9 slides the sloping surface 8.2 up until the top 9.1 of the latching hook 9 due to the tension of the spring 11 in the locking groove 8.1 of the positioning element 8th intervenes.

To unlock the positioning mechanism and closing the screen, the slider 5 towards the mast foot 7 emotional. Because slider 5 and hub 4 relatively movably connected to each other, this presses a projection 5.1 of the slider 5 on the lower end 9.2 of the latching hook 9 , This will be the top end 9.1 of the latching hook 9 from the locking groove 8.1 moved away, so that the locking is released. This situation is in 4 shown. By further shifting of slide 5 and hub 4 in the direction of the mast foot 7 the screen can be closed.

The mast 6 owns in the 3 and 4 a recess 12 into which one on the positioning element 8th optionally provided retaining lug can engage to the position of the positioning element 8th on the mast 6 to define and fix.

As in 5 shown, it is advantageous on the latching hook 9 two ribs 9.3 and 9.4 form, between which the spring 11 is positioned. It is advantageous, the spring 11 on the same wave 10 to store on which the latching hook 9 is stored.

In case of mechanical failure of the positioning mechanism can hub 4 and slider 5 after releasing the articulated connection between the support struts 3 and the hub 4 from the mast 6 towards the mast foot 7 deducted and repaired or replaced.

LIST OF REFERENCE NUMBERS

1

Crown

2

roof bars

3

support struts

4

hub

5

pusher

5.1

head Start

6

mast

7

mast

8th

positioner

8.1

locking groove

8.2

sloping surface

9

latch hook

9.1

top end

9.2

lower end

9.3

rib

9.4

rib

10

wave

11

feather

12

recess

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• US 6571813 B2 [0003]
• DE 202008004468 U1 [0003]

Claims (8)

Positioning mechanism for a screen with a mast ( 6 ), at one end of a crown ( 1 ), with which roof bars ( 2 ) are hingedly connected, and a slider ( 5 ) for opening and closing the screen, characterized in that on the roof bars ( 2 ) Struts ( 3 hinged at its other end to a hub ( 4 ) are hinged, which with the slide ( 5 ) is movably connected, wherein the hub ( 4 ) a latching hook ( 9 ), which on a tangential transversely to the mast ( 6 ) wave ( 10 ) is tiltably mounted, and whose upper end ( 9.1 ) by means of a spring ( 11 ) is stretched in the direction of the mast, so that the upper end ( 9.1 ) upon reaching the opening position of the positioning mechanism in the locking groove ( 8.1 ) of a positioning element ( 8th ), which on the mast ( 6 ), and wherein the catch hook ( 9 ) a lower end ( 9.2 ), to which during a displacement of the slider ( 5 ) in the direction of the mast foot ( 7 ) in the slide ( 5 ) arranged projection ( 5.1 ) so that the upper end ( 9.1 ) of the latching hook ( 9 ) from the locking groove ( 8.1 ) is moved out. Positioning mechanism according to claim 1, characterized in that on the slide ( 5 ) facing side of the positioning element ( 8th ) an inclined surface ( 8.2 ) is provided, on which the upper end ( 9.1 ) of the latching hook ( 9 ) until reaching the locking groove ( 8.1 ) can slide. Positioning mechanism according to claim 1, characterized in that the positioning element ( 8th ) is designed as an annular sleeve. Positioning element according to claim 1, characterized in that the positioning element ( 8th ) is designed as a C-profile. Positioning mechanism according to claim 1, characterized in that on the latching hook ( 9 ) two ribs ( 9.3 ) and ( 9.4 ) are formed, between which the spring ( 11 ) is positioned. Positioning mechanism according to claim 3, characterized in that the spring ( 11 ) on the same wave ( 10 ) is mounted, on which the latch hook ( 9 ) is stored. Positioning mechanism according to claim 1, characterized in that on the mast ( 6 ) an at least recess ( 12 ) is provided, in which at least one retaining lug of the positioning element ( 8th ) intervenes. Positioning mechanism according to claim 1, characterized in that the connection between the support struts ( 3 ) and the hub ( 4 ) can be solved.

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