Technical field

The invention relates to an arresting device for arresting the gripping profile of roller-type insect net systems at the bottom position (in the lowered state) thereof. Backround art

Building interiors are typically protected against insects by insect net systems. Several different types of insect net are known, including fixed, roller, opening, sliding, and Plisse-type systems.

Hungarian patent specification HU205196 discloses the manner of securing the fixing frame of an insect net to a door or window frame. According to this known solution, securing is provided by a securing element made from shaped spring steel that may be inserted in a groove extending in the door or window frame.

The arresting mechanism according to utility model U4336 consists of an upper component attached to the gripping profile of an insect net, and a lower component that is disposed in the bottom portion of the frame and comprises a spring element, with a cam-path adapted for guiding the spring element of the lower component being formed in the upper component.

The utility model has the disadvantages that the spring element disposed in the bottom portion is prone to get damaged, and can only provide secure arresting in case of insect nets with lower span width.

Objectives of the invention

The objective of the present invention is to eliminate the above described drawbacks by providing a mechanism that may be locked and released quickly and easily.

The inventive objective is fulfilled by providing an arresting device which consists of an upper component secured to the gripping profile of the insect net and a lower component disposed in the bottom portion of the frame, the device being characterised by that the upper component comprises a spring element, with a cam- path adapted to be brought in an opening/closing connection with the spring element and a leading-in edge adapted for leading the spring element in the cam-path being disposed in the lower component.

In a preferred embodiment of the arresting device according to the invention the cam-path of the upper component is formed of multiple path sections.

Brief description of the drawings

The features and operation of the arresting device according to the invention are explained in detail referring to the attached drawings, where

Fig. 1 shows the front elevation view of the arresting device according to the invention in the opened position of the insect net,

Fig. 2 is the side elevation view of the arresting device of Fig. 1 ,

Figs. 2a-2g illustrate the operation of the arresting device according to Fig. 1 , and

Fig. 3 shows the top plan view of the arresting device of Fig. 1.

Modes of carrying out the invention

The arresting device according to the invention is built into a frame 5 of a door or window known per se, and consists of an upper component 1 secured to the gripping profile 3 (Fig. 1) of an insect net 4, and a lower component 2 disposed in the frame 5 of the door or window, where a cam-path 6 adapted for receiving a spring element 8 - a flat spring - disposed in the upper component and guiding it between an opening and a closing position (see Fig. 2) is disposed in the lower component 2. During the upward and downward motion of the insect net 4 the spring element 8 of the upper component 1 moves along the cam-path 6 that consists of multiple sections.

The insect net 4 is part of an insect net system known per se, the flexible- material insect net being wound on a spring shaft secured in the upper portion of the frame 5. The insect net 4 is guided in the frame 5 and, if necessary, may be pulled down in order to prevent insects from entering a closed room.

However, it has to be provided for that the insect net 4 is arrested in the pulled- down position. The manner of moving and arresting the insect net 4 is explained with reference to Figs. 2a-2g that show the upper component 1 and the lower component 2 in side view. The spring element 8 disposed in the upper component 1 is shown in dashed lines, the interconnection of the upper and lower components 1 , 2 also being indicated in dashed lines. For the sake of better understanding, the interconnection of the lower component 2 and the spring element 8 of the upper component 1 is shown in separate drawings.

According to Fig. 2a the upper component 1 is moved towards the lower component 2 in the guide track of the frame 5 in the direction of the arrow 9. When the upper component 1 reaches the lower component 2 it contacts the leading-in edge 7 of the lower component 2 which pretensions the spring element 8 of the upper component 1 (see Fig. 2b).

Continuing its downward motion, the upper component 1 carries the spring element 8 further along the leading-in edge 7. Leaving the !eading-in edge 7, the spring element 8 is further moved in the direction of the path section 6a - the positioning edge - of the cam-path 6 formed in the lower component 2. When the spring element 8 reaches the path section 6a - the positioning edge - of the cam-path 6, the upper component 1 is moved by the pretensioning/rewinding spring of the insect net 4 in the direction of the path section 6b - the fastening edge - of the cam-path 6. The configuration of the lower component 2 prevents the further motion of the spring element 8 and thus locks the arresting mechanism (see Fig. 2c).

The mechanism is kept in this position - i.e. the spring element 8 stays at the path section 6b of the cam-path 6 - as long as the insect net 4 is desired to be kept in the lowered position. To release the mechanism - i.e. to pull up/wind up the insect net 4 - first the upper component 1 is again moved downwards, in the direction of the arrow 9. As a result of this, the spring element 8 moves from its rest position towards the path section 6c - the releasing edge - of the cam-path 6 of the lower component 2 (see Fig. 2d).

In the lower dead centre position of the spring element 8 the rewind spring of the insect net 4 moves the upper component 1 upwards, in the direction of the arrow 10, whereby the spring element 8 of the upper component 1 is no longer capable of returning into its arresting position but due to its pretensioning it contacts the path section 6a - the leading-out edge - of the cam-path 6 of the lower component 2 (see Fig 2e). As the insect net 4 moves upwards in the direction of the arrow 10, after leaving the path section 6d the spring element 8 enters and moves along the path section 6e - the leading-out path -. The path section 6e - the leading-out path - "ejects" the spring element 8, and, after the interconnection of the upper component 1 and the lower component 2 is terminated, the spring element 8 returns to its rest position (see Fig. 2g). After that, in case the upper component 1 is moved downwards, in the direction of the arrow 9 again, the spring element 8 can come in contact only with the leading-in edge 7 of the lower component 2, and the above described arresting process may be carried out again.

In Fig. 3 the arresting device according to the invention is illustrated in top plan view, clearly showing the position of the upper component 1 , adapted for receiving the spring element 8, inside the frame 5.

The main advantage of the arresting device according to the invention is that it applies simple structural components and yet provides for the effective arresting and quick and easy release of the insect net.