DE212006000109U1 - Apparatus for controlling the speed of opening or closing a fly screen or the like - Google Patents

Abstract

Device for controlling the speed of opening or closing a fly screen (1) or the like, comprising a rigid part (16) which can be fastened to a rigid element (3) of the fly screen (1) and to which a sleeve (17) is rotatably mounted, which can be attached to a movable element (5) of the fly screen (1), characterized in that between the rigid part (16) and the sleeve (17) only viscous means (18) for controlling the relative rotational speed included are.

Description

The The present invention relates to an apparatus for controlling the speed opening or closing a fly screen or similar.

It Fly screens are known that attach with a rigid element are provided on a window frame. This rigid element contains in its inside a spindle, which is attached to a spring and around which a net or other roller blind is wrapped, which or which protrudes from a suitable slot in the rigid element.

in the Operation, the fly screen by simply pulling on the be closed by the rigid element protruding end (by Lowering the shade), causing the spindle to rotate around the shade unroll and tension the spring; the roller blind will then be in one Hook hooked to his (at least partially) closed Maintain position.

Around to release the window opening from the fly screen (by this is opened), only the hook must be unhooked which causes the spring to rotate the spindle, then the roller blind rewinding.

Such Springs that survive a variety of opening and closing cycles are, are made of materials with above average made of mechanical properties, with the result that the Springs in the exercise of their function to roll up the blind violently, whereby it can slip out of the user's hand when he is not forcibly held; this could cause that the roller blind (which at its end with a hard tubular Element) meets the user, with a possible Risk of injury.

The violent return of the blinds could also cause a jolt, which often damages the fly screen.

Around To overcome these disadvantages are devices for controlling the speed of opening or closing of the fly screen, which is one on a unidirectional clutch mechanism fastened brake included.

If Such devices are used while the fly screen is closed (i.e., when the roller is unwound from the spindle is used to cover a window opening), prevents the unidirectional Clutch mechanism that releases the brake, causing this does not work.

If in contrast, the fly screen is opened (i.e. H. the blind is wound on its spindle to the window opening release) releases the unidirectional clutch mechanism the brake off, so the fly screen in this situation very much slowly wound around its spindle, eliminating the risk of injury for the user.

A device of this kind is for example in the WO 03-058020 described.

These However, described conventional devices have many disadvantages, especially the large number on parts of the unidirectional clutch mechanism, which is relative move each other; This leads in particular to a bad one Operational safety and high production costs.

For this it was recognized that these elements are in relative motion wear out over time; if this is the case, the unidirectional Clutch mechanism no longer grip and the device can no longer brake the fly screen.

About that In addition, the conventional devices necessarily at a certain (defined at the planning stage) Be arranged side of the fly screen; if not followed they will not be able to stop the fly screen if this is pulled up while reversing the roller blind brake when lowered without exerting any braking action when the roller blind is pulled up.

The The main object of the present invention is therefore a Device for controlling the speed of opening or closing a fly screen or the like, in which the mentioned disadvantages of the prior art are eliminated.

in the Scope of this main task is a further object of the invention, to provide a device having a smaller number of each other contains sliding parts, as conventional devices.

A Another object of the invention is to provide a device which is very reliable and economical, in particular in terms of production costs.

Especially the device according to the invention contains no relative moving parts that wear over time, so that their correct operation is maintained.

Another object of the invention is It is to provide a device which can be freely attached to one of the two sides (right or left) of the fly screen and which works flawlessly in both cases.

The specified main task, together with the above and others Tasks is in accordance with the present invention solved by a device for controlling the speed opening or closing a fly screen or the like according to the appended Claims.

Further Features and advantages will become apparent from the description of a preferred, however non-exclusive embodiment the device according to the invention can be seen by way of non-limiting example in FIGS attached drawing figures is explained in which:

1 an exploded perspective view of a fly screen is, on which a device according to the present invention is mounted;

2 a longitudinal section through the device of the present invention;

3 an exploded perspective view of the device according to the invention; and

4 a sectional view taken along the line IV-IV in 2 is.

The mentioned figures show a fly screen, the whole by the reference numeral 1 is designated.

The fly screen 1 consists of a pair of lateral uprights 2 attached to a hollow bar at their upper ends 3 fixed with square cross-section.

In its interior contains the hollow bar 3 one rotatable on the uprights 2 attached spindle 5 (ie, it is attached so as to be within the hollow bar 3 can rotate).

A roller blind 6 For example, made of perforated fabric (allowing the passage of air and light but preventing passage of insects and mosquitoes) is around the spindle 5 wound; in its rest position is the roller blind 6 from the hollow bar 3 picked up and stands out of him through the slot 7 in front.

Attached to its lower edge, the roller blind points 6 a profile bar 8th with handles 9 which can be grasped to pull the blind, so that the fly screen can be opened or closed as desired.

One at one end of the hollow bar 3 attached spring 10 will when assembling the fly screen 1 biased and is further tensioned during use when the roller blind 6 is lowered while it is relaxed (to the roller blind in his on the spindle 5 wound up and in the hollow bar 3 resumed resting position), when the roller blind is raised.

At the other end of the hollow bar 3 is a device 15 arranged to the speed of opening or closing a fly screen 1 or the like according to the invention.

The device 15 contains a rigid part 16 attached to a rigid element of the fly screen 1 ie on the hollow bar 3 can be attached.

One rotatable on the rigid part 16 attached sleeve 17 is on a moving element of the fly screen 1 ie on the spindle 5 attachable by placing it in the interior of the spindle 5 is pressed into it.

Between the rigid part 16 and the sleeve 17 contains the device 15 only viscous agents 18 for controlling the relative rotation speed.

One on the rigid part 16 rigidly fixed stator 20 is in the inside of the sleeve 17 inserted, which contains a viscous liquid such as a high-density oil.

For attachment to the rigid part 16 points the stator 20 an element 21 on which a scar is from 22 extends, at least partially within the sleeve 17 is recorded.

Starting from the hub 22 extends a stator wing part 23 that in the sleeve 17 is inserted and immersed in the viscous liquid contained therein.

Two superimposed seals 25 are properly between the hub 22 and the sleeve 17 used to allow the viscous fluid to escape from the sleeve 17 to prevent.

The connecting element 21 is on the rigid part 16 through a connection piece 27 secured, which is a cylindrical element with a square inner profile 28 owns to the connecting element 21 with a fit, and an outer splined shaft profile 29 has to be in an inner toothed portion of the rigid part 16 to intervene with a fit.

Conveniently, the device also includes a holder 30 , in the pushed position on the rigid part 16 the device 15 and on the rigid element 3 (ie the hollow bar) of the fly screen 1 can be attached.

The holder 30 has funds 31 for a snap connection to the rigid part 16 on which means a square pin 32 include, with one fitted into a receptacle of the bracket 30 insertable head 33 is provided.

The pencil 32 indicates with a hook 34 provided end to a seat 35 of the rigid part 16 snapping into place.

The operation of the device according to the invention is apparent from the described and illustrated and is essentially the following:
When the roller blind 6 the fly screen is lowered, the hollow bar rotates 3 , and as a result, the sleeve rotates 17 ,

This creates frictional forces from the viscous fluid inside the sleeve 17 originate.

In a corresponding manner, the sleeve rotates 17 when the roller blind 6 of the fly screen 1 is raised, inhibited by the contained therein viscous liquid and by the wing part 23 , which generates high friction forces.

When the spring 10 the roller blind 6 Withdraws very violently, the friction in the viscous fluid (which depends on the speed of rotation of the sleeve 17 depends) very high, which is the winding of the blinds 6 substantially slows down.

Therefore, the viscous forces in practice inhibit the rotation of the sleeve and thus the blind 6 carrying spindle 5 both when the roller blind 6 raised as well as when lowered.

This allows the force of the spring 10 is somewhat counteracted when the shade is raised and also allows the roller blind to be lowered at a uniform speed without the operator having to apply a force much greater than conventional devices. At the same time, a heavy jolt that could damage the fly screen is avoided.

In In practice it has been recognized that the invention Fly screen allows the retreating Force of the spring is limited, so that any risk of injury to an inattentive operator while using the fly screen is excluded.

simultaneously hinders the device lowering the blinds of the fly screen not, but vice versa prevents a jerk when lowering the Roller blinds, which are dangerous to the integrity of the fly screen could be.

Conveniently, the device can be used with all rolling shielding devices can be used, such as roller blinds, sunshades, etc. with horizontal, vertical or inclined spindle.

In In practice, the materials used and the dimensions chosen according to the requirements and the state of the art become.

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• WO 03-058020 [0010]

Claims (9)

Device for controlling the speed of opening or closing a fly screen ( 1 ) or the like, comprising a rigid part ( 16 ) attached to a rigid element ( 3 ) of the fly screen ( 1 ), and to which a sleeve ( 17 ) rotatably mounted on a movable element ( 5 ) of the fly screen ( 1 ), characterized in that between the rigid part ( 16 ) and the sleeve ( 17 ) only viscous agents ( 18 ) are included for controlling the relative rotational speed. Device according to the preceding claim, characterized in that a rigid part ( 16 ) mounted stator ( 20 ) in the sleeve ( 17 ), which is a viscous liquid ( 18 ) contains. Device according to one or more of the preceding claims, characterized in that the stator ( 20 ) an element ( 21 ) for connecting to the rigid part ( 16 ), wherein from this connecting element ( 21 ) a hub ( 22 ), which at least partially in the sleeve ( 17 ) and from the hub ( 22 ) a stator wing part ( 23 ) he stretches that into the sleeve ( 17 ) and into the viscous liquid ( 18 ) is immersed. Device according to one or more of the preceding claims, characterized in that at least one seal ( 25 ) between the hub ( 22 ) and the sleeve ( 17 ) is used to prevent the escape of the viscous liquid ( 18 ) from the sleeve ( 17 ) to prevent. Device according to one or more of the preceding claims, characterized in that said connecting element ( 21 ) by means of a connecting piece ( 27 ) on said rigid part ( 16 ) is secured. Device according to one or more of the preceding claims, characterized in that the connecting piece ( 27 ) comprises a cylindrical element having a square inner profile ( 28 ) in order to connect said connecting element ( 21 ) with an interference fit, and an outer splined shaft profile ( 29 ) into an inner toothed portion of said rigid member (10). 16 ) to intervene with a fit. Device according to one or more of the preceding claims, characterized in that it comprises a holder ( 30 ), which in an inserted position on the said rigid part ( 16 ) of the device and on the rigid element ( 3 ) of the fly screen ( 1 ) can be attached. Device according to one or more of the preceding claims, characterized in that said holder ( 30 ) Medium ( 31 ) for a snap connection to said rigid part ( 16 ) having. Device according to one or more of the preceding claims, characterized in that the snap connection means ( 31 ) a square pin ( 32 ) adapted for making a snug fit in a seat of said holder ( 30 ), the stylus ( 32 ) with a hook ( 34 ) for snapping into a seat ( 35 ) of said rigid part ( 16 ) end provided.