DE29518723U1 - Twist grip fitting for windows and doors with security against unauthorized operation - Google Patents

Description

Herbert Hintz ß^iffcisanstraß» 19 _# · .*·.&idigr;*** 24796 Bredenbek

Description

Turn handle fitting for windows and doors with protection against unauthorized operation

Rotary handle fittings of the usual design consist of a rosette for fastening to the window or door frame and a handle mounted rotatably in it with a square pin that engages in a corresponding square receptacle of the lock.

Turn handle fittings, which in addition to the usual function of opening and closing a window or door, also have the requirement to protect against unauthorized operation of the turn handle, usually have a mechanism that is operated with the help of a lock.

If a sufficiently large torque is applied to the turning handle when it is locked, this will inevitably lead to the destruction of the locking mechanism of the turning handle and to the unauthorized opening of the window or door.

The invention specified in claims 1-3 is based on the problem of creating a rotary handle fitting in which the rotary handle does not offer any resistance to unauthorized application of torque when the window or door is locked and thus it is not possible to operate the rotary handle by force. In addition, the rotary handle fitting should be inexpensive to manufacture.

This problem is solved with the features listed in claims 1-3.

The invention can be manufactured inexpensively and easily, and various variants of the external shape are also possible. It is also conceivable that the elements 6-9 can be replaced by other geometric shapes, e.g. when using casting processes. In addition to the features listed in claims 1-3, an important advantage is that the window or door is prevented from being opened accidentally by small children (child safety lock).

The invention is shown in an embodiment in the drawing, namely: Figure 1 shows the fitting according to the invention in front view and partially in section Figure 2 shows the fitting according to the invention along line I-I of Figure 1 and Figure 3 shows a cutout along line II of Figure 1

The fitting for windows and doors shown in the drawing consists of a rosette 1 that is rigidly attached to the door or window frame (not shown in detail) and a lower part 2 that is rotatably mounted in it, in which the square pin with cylindrical pin 3 is firmly pressed. The turning handle 4 can be easily turned on the cylindrical part of part 3 and can be moved axially against the pressure of the compression spring 16. The rosette 1 and the

Herbert Hintz Baiffaiganstrasse 19 _&bgr; j

24796 Bredenbek

The movable lower part 2 is connected to the rotary handle 4 to form a unit. The safety slide 5 has a dovetail shape on its outer contour, with the exception of the front, and is guided in a matching dovetail groove in the rotary handle 4. It also has a through hole which, in the "unlock" position - the safety slide 5 must be moved in the direction of the arrow - only enables the rotary handle to be moved axially. Two half-shell-shaped recesses on the underside in conjunction with the ball 10 and the compression spring 11 enable the safety slide to be moved precisely. As stated in claim 1, the rotary handle 4 can move freely radially on the cylindrical part of the square pin 3 without resistance if it is not operated correctly. To open the lock of the window or door, the safety slide 5 must first be moved in the direction of the arrow. Only then can the rotary handle 4 be moved against the spring pressure of the compression spring 16 in the direction of the lower part 2 axially to the square bolt 3. The pins 6 and 7 engage in the holes 8 and 9 and the lower part 2 with the square bolt 3 can be turned with the rotary handle 4 to open or close the window or door. After this process has been completed, the tension of the compression spring 16 causes the rotary handle 4 to move axially again, but in the opposite direction, and thus the pins 6 and 7 disengage from the holes 8 and 9. In this state, the rotary handle 4 can move freely radially again. To secure the rotary handle fitting, the safety slide 5 must be pushed back into the position shown in the drawing.

List of reference symbols

1 rosette

2 Lower part

3 square pins with cylindrical pin

4 Handle

5 sawing slides

6 Cylinder pin

7 Cylinder pin

8 Hole for cylindrical pin 6

9 Hole for cylindrical pin 7

10 ball

11 Compression spring

12 Washer

13 Cylinder head screw

14 Washer

15 Hole for wood countersunk screw

16 Compression spring

• t · · r,

Claims (3)

Herbert Hintz Rajffaieanstraße49 · *·.:*·* 24796 Bredenbek Protection claims 1. Turn handle fitting for windows and doors with protection against unauthorised operation, characterized, that if the rotary handle 4 is not operated correctly, it can be moved radially on the cylindrical part of the square pin 3 without resistance. 2. Turn handle fitting according to claim 1, characterized, that before a torque can be exerted on the lower part 2, the rotary handle 4 must be moved in the axial direction from the square pin 3 against the pressure of the spring 16, so that the pins 6 and 7 engage in the bores 8 and 9. Protection is also claimed for all other geometric shapes and designs that are suitable for transmitting the required torque to the locking mechanism. 3. Turn handle fitting according to protection claims 1 and 2, characterized, that before the rotary handle can be operated according to claim 2, the safety slide 5 must be moved against the pressure of the spring-loaded ball 10 until the hole in the safety slide aligns with the screw 13. This is made easier by the fact that there is a second locking option for the ball. A claim for protection is also made for a design of the safety slide that does not have a through hole, but rather a blind hole on the underside.