EP0460297B1 - Handling mechanism - Google Patents

Abstract

An actuating handle designed especially as a window grip (10) has a coupling (K) surrounding the grip neck (14) and possessing positive-locking elements, such as lugs (29), noses (52) or the like, located diametrically opposite one another. The coupling parts (46, 50) are guided so as to be axially slidable on one another. One coupling part is a locking ring (50) fastened to a shank (22) of a spring-loaded axially displaceable locking unit (20), whilst a locking sleeve (46) held fixedly in terms of rotation in the fastening body (30) forms the other coupling part. It can sit by means of bearing faces (48) in a holding member (33) which is connected rigidly to a fastening member (30) or which is in one piece with or set in the latter. The locking ring (50) is axially guided by means of circumferential extensions (58) in a lower recess (15) of the grip head (12) and is loaded upwards by a compression spring (26). For actuation, the locking unit (20) has a push-knob which, for example in the locked state, projects beyond the grip head (12); it can be replaced by a lock unit lockable and releasable by means of a key or be combined with this. <IMAGE>

Description

The present invention relates to an operating handle, in particular a window handle of the type specified in the preamble of claim 1.

Lockable or lockable handles are known for example from DE-U-8 624 544 and DE-U-8 514 560. When operating the handle, the assigned device, e.g. a window gear, a lock nut or the like. rotated along. A stop body, with which the handle is connected axially fixed, can have a latching device in order to determine preferred angular positions of the handle. For windows with tilt and turn fittings, a zero degree locking position is conventionally given when the window handle is facing downwards; if it is placed horizontally, the window can be pivoted about its vertical axis, i.e. be opened. If only limited room ventilation is to take place, the window can be tilted around a horizontal axis by turning the handle upwards (to the 180 ° position).

Switching through several handle rotary positions is not always desirable. In the daily operation of the window, the tilt position is used more often than the swivel position. With newer operating handles, the tilt position can already be reached in a 90 ° position of the handle, which prevents incorrect operation when the window pops out of the window gear tilt joint. In a known embodiment it is only possible to turn the handle upwards once a button on the handle head has been pressed.

Lockable window handles have been developed especially for rooms that need to be secured from the inside and can only be moved from the 0 ° position to the 90 ° position. This then corresponds to the tilt position of the window, which can be tilted for room ventilation without unlocking; but it remains closed. The window can then only be opened by operating personnel who have a key.

A handle of the type mentioned is described in DE-U-8 902 660. It has a coupling, the parts of which, when engaging, face end faces which slide towards one another, but the latter do not form any axial guidance for one another. Rather, a slide ring is provided for the axial guidance of the movable coupling element, which sits bluntly on a flared bushing; an annular bushing is not only axially spaced from the sliding ring, but also has enough radial play to the movable coupling part that its lower inner edge still passes the annular bushing even in the event of a tilt. As a result, safe functioning is not always guaranteed.

There is a general need for an improved construction which, on the one hand, is simple in construction, but on the other hand, ensures ease of use with sufficient security. The object of the invention is to provide an actuating handle that meets these requirements and only allows the opening or tilting of a window provided with the handle when it is unlocked. Furthermore, the handle should be able to be quickly converted if a change of function is desired or required.

Basic ideas of the invention are specified in the characterizing part of claim 1. Refinements are the subject of claims 1 to 13.

In a handle, one coupling part of which is a locking ring carried by the shaft of the locking unit, the invention provides according to claim 1 that the other coupling part of a locking sleeve which is held in a rotationally fixed manner on the stop body is formed, on or on which the locking ring is guided in an axially slidable manner. This is a significant advance over previous designs, the relatively rigid structure of which only allowed a relative movement to disengage and engage the interlocking elements, whereas there was no mobility of the coupling parts. The new design not only simplifies production and assembly, but also ensures that the bearing of the handle neck and that of the coupling with good axial guidance are mechanically stabilized in spite of the proximity in a narrow space.

The locking sleeve can sit according to claim 2 with contact surfaces in a holding member which is rigidly connectable or integral with the stop body, for example in the form of a reinforcing plate according to claim 3. Advantageously, the lower end of the locking sleeve with the contact surfaces in the embodiment of claim 4 forms one Polygon, e.g. a square or octagonal, the height or axial extent of which is at least equal to the thickness of the reinforcing plate. It can be seen that the components mentioned are of a simple form in principle and can therefore be inexpensively manufactured and easily assembled (or dismantled). Significant advantages in the manufacture and application are combined with high usability, which benefits the user.

An important measure of the invention according to claim 5 is that the coupling parts are each interchangeably mounted on the body carrying them. As a result, it is achieved in a surprisingly simple manner that different requirements or functional requirements can also be taken into account on site without the need for new fittings and installation. Warehousing is also greatly relieved.

According to claim 6, the one coupling part, namely the locking ring, can have at least one axially directed nose which fits with minimal circumferential play between ears on the upper outer region of the other coupling part, ie the locking sleeve. The engagement of the positive locking elements therefore takes place in one Circumferential area instead of a relatively large radius, so that a high rotational resistance is ensured in the locked state. This applies in particular to the embodiment of claim 7, according to which the coupling parts each have four form-locking elements diametrically opposite one another in pairs, in particular at angular intervals of 90 °, so that quadruple support with a correspondingly large section modulus is ensured. Thanks to its simple design, high long-term reliability also has an embodiment in which only one locking ring nose between two ears of the locking sleeve is either held in a rotationally fixed manner or can be rotated, for example, by 225 °, around the TBT function - ie the actuation of the window handle only to tilt , then to pivot - to allow.

In terms of construction, it is advantageous if the locking ring is axially guided with circumferential projections in a recess in the lower region of the handle head. This also contributes to the absorption of torques that prevent a violent handle adjustment in the locked state.

According to claim 9, the locking ring is loaded by a compression spring which surrounds the locking sleeve and is supported at least indirectly - by a cover - on the stop body. In this embodiment, the handle is therefore usually locked, since the form-locking elements of the locking ring and locking sleeve are normally in engagement. Only when the locking unit is pressed down against the spring load do the coupling parts move apart, which releases the handle movement. According to claim 10, the locking unit is also loaded upwards by a support spring which surrounds the locking shaft in a stepped bore in the handle head and whose spring force is supported by that of the compression spring which presses the locking ring upwards.

To the strength and functionality of the construction according to the invention it also contributes that the locking sleeve according to claim 11 can be rotatably arranged on a bearing bush of the stop body and on a spacer sleeve, the latter in turn supporting the handle neck. This concentric arrangement allows minimal bearing play with very little friction can be influenced advantageously by choosing different materials and / or permanent lubrication.

Advantageously, according to claim 12, a push button is provided for actuating the locking unit, which extends beyond the handle in the locked state and enables unlocking by simple thumb pressure.

The invention further provides according to claim 13 that the locking unit is replaced by a lock unit that can be unlocked and unlocked by means of a key, or is combined with such a lock unit, so that handling offers even greater security in use.

Fig. 1

eine Teil-Axialschnittansicht eines Fenstergriffs im verriegelten Zustand,

Fig. 2

eine Teil-Axialschnittansicht entsprechend Fig. 1, jedoch im entriegelten Zustand,

Fig. 3a, 3b, 3c

eine auseinandergezogene Schrägansicht von Kupplungs- und Halteteilen und

Fig. 4a, 4b, 4c

eine weitere Explosionszeichnung von Kupplungs- und Halteteilen einer abgewandelten Bauform.

Further features, details and advantages of the invention result from the wording of the claims and from the following description of exemplary embodiments with reference to the drawing. In it show:

Fig. 1

a partial axial sectional view of a window handle in the locked state,

Fig. 2

2 shows a partial axial sectional view corresponding to FIG. 1, but in the unlocked state,

3a, 3b, 3c

an exploded oblique view of coupling and holding parts and

4a, 4b, 4c

another exploded view of coupling and holding parts of a modified design.

In various operating states, a window handle generally designated 10 is shown in FIGS. 1 and 2. It has a main part 11, a grip head 12 and a neck 14, in which there is an upwardly directed depression 15 for receiving components (described below). There is also a square hole 16 into which a square pin (not shown) can be inserted. Parallel to the axial direction A, but outside the axis of rotation of the handle 10, a locking unit 20 is inserted into the head 12, which with or against spring force can be moved axially parallel. In a stepped bore 18, a support spring 25 encloses a shaft 22 of the locking unit 20, on the collar 21 of which it rests at the top.

On the handle neck 14 is a slide or spacer ring 24, which can be designed as a brass sleeve. A compression spring 26 supports a cover plate 28 which covers the upper side of a stop body 30 so that it can pivot. For a better grip on the cover 28, finger depressions 34 are provided on the narrow sides of the stop body 30, which is rectangular in plan view.

The stop body 30 has cams 36 with screw holes 37 for attachment to a support structure (not shown), e.g. on the frame of a window. The stop body 30 is in one piece with a centrally arranged bearing bush 31, in which the spacer sleeve 24 receives the handle neck 14. This is axially fixed, but rotatable, to the stop body 30 by means of a flared bushing 44. Between the flanging and the lower part of the bearing bush 31 there is a latching arrangement consisting of upwardly directed bottom latching depressions 38 and a bottom latching ring 40 cooperating with them. Comparable arrangements are in DE-OS 27 52 213 and in DE-GM 85 14 560.

The slide ring 24 is enclosed by a clutch K, which has a locking bush 46. It has flats 48 at the lower end, which protrude into a recess 58 of the same shape in a reinforcing plate 33, which is connected to the stop body 30 in a fixed position. A locking ring 50 is slidably arranged on the locking bush 46. This has a radial extension 54 for attachment to the lower end of the locking shaft 22, e.g. by means of a screw 23. A compression spring 26 surrounds the locking sleeve 46 and is supported on the one hand on the cover plate 28 and on the other hand on the underside of the locking ring 50.

Two different designs of the coupling arrangement K are shown in FIGS. 3a, 3b, 3c and 4a, 4b, 4c, respectively, pulled apart.

The left row of figures (Fig. 3a, 3b, 3c) shows the two-part coupling K at a distance above the reinforcing plate 33, which has two countersunk screw holes 32 and the central recess 58, which has the same contour as the lower end of the locking sleeve 46. Their flats 48 have at least the same axial extent or height as the reinforcing plate 33 or its thickness. The locking sleeve 46 of FIG. 3a has two ears 49 at an angular distance of 90 °, which project radially outwards at the upper end. In between is a gap, the width of which corresponds to that of a nose 52 of the locking ring 50 so that the latter can be locked with minimal circumferential play as soon as the locking ring 50 on the assembled locking sleeve 46 has reached the upper axial position. In this locked position (see FIG. 1), no movement of the window handle 10 or its main part 11 is possible. However, if the push-button latch 20 is pressed down against the force of the springs 25, 26 (FIG. 2), the latch ring 50 disengages and the handle 10 or its main part 11 can be pivoted. If it is rotated by more than 90 °, the unlocking takes place in such an angular position that the one nose 52 (FIG. 3b) on the larger free peripheral part of the upper region of the locking sleeve 46 in the ears 49 only finds end stops which one Swivel range from e.g. Limit 225 °. This is useful for the TBT function (tilt before turn), which enables free tilting without unlocking, while it should only be possible to swing open the window when the handle 10 is unlocked.

The embodiment shown in Fig. 4a, 4b, 4c uses very similar coupling parts and a similar reinforcing plate 33. In the example of Fig. 4a, the locking sleeve 46 has four identical, radially projecting ears 49. The circumferential gaps between them are just large enough that four lugs 52 of the locking ring 50 of the same shape can engage with essentially no play as soon as the locking ring 50 has reached the sleeve 46 (FIG. 1). This so-called 4-point locking ensures a special high moment of resistance for the locked window handle 10. Whose rotation relative to the stop body 30 is prevented by the fact that the lugs 52 of the locking ring 50 are positively engaged in the gaps between the ears 49 of the locking sleeve 46. When the pushbutton latch 20 is actuated, this positive locking is canceled, so that the window handle 10 can be pivoted with the main part 11 during the unlocking.

The torque applied in the locked state is transmitted from the handle 10/11 via the locking ring projections 58 guided in the handle head 12 and the lugs 52 to the ears 49 of the locking sleeve 46, the flats 48 of which are supported in the recess 58 of the reinforcing plate 33 in a rotationally fixed manner. The latter is in turn embedded in the stop body 30 (FIGS. 1 and 2) in such a way that its cams 36 introduce all forces or moments into the window frame with the screw connection 37.

It can be seen that by simply exchanging different locking sleeves 46 and the respective locking rings 50, the different actuation methods for the window handle 10 can be implemented quickly as required. For production and storage, there is the particular advantage that all other components of the actuating handle can be the same. It is up to the purchaser or user to determine the design of the window handle 10. The operation is uniform: the locking unit 20 acts in any case as a so-called child safety device.

It is also within the scope of the invention to use a lock unit which can only be unlocked by means of a key, such as e.g. described in DE-GM 85 14 560. Coupling elements in the manner of DE-GM 89 02 660 or 89 07 692 can also be used.

Claims (13)

1. Operating handle, in particular window handle (10), with a handle neck (14) mounted in a stop (30) so as to be rotatable and axially fixed, and a driver means (16) for rotational adjustment of a structural part to be operated, e.g. for a window gear mechanism, with a handle head (12), in which a spring-loaded latch unit (20) is arranged to slide parallel to the axial direction (A), and with a coupling (K), which encloses the handle neck (14) and the parts of which have form-locking elements such as ears (49), lugs (52) or similar arranged opposite one another, wherein one coupling part (50) is a latch ring (50) fastened to a shaft (22) of the latch unit (20), and the other coupling part (46) is axially fixed to the stop (30), characterised in that the other coupling part (50) is formed by a latch sleeve (46) held non-rotatably on the stop (30), at or on which the latch ring (50) is disposed to slide axially.
2. Handle according to Claim 1, characterised in that the latch sleeve (46) sits with contact surfaces (48) in a holding element (33), which may be rigidly connected to the stop (30) or is integral thereto.
3. Handle according to Claim 2, characterised in that the holding element is a reinforcing plate (33) embedded in the stop (30), and may be screwed, preferably together with said stop (30), on top of or on the outside a support structure, e.g. a window frame.
4. Handle according to Claim 3, characterised in that the lower end of the latch sleeve (46) and the contact surfaces (48) form a polygon, e.g. a four- or eight-cornered arrangement, in which the height or axial extension equals the thickness of the reinforcing plate (33).
5. Handle according to one of Claims 1 to 4, characterised in that the coupling parts (46, 50) are each replaceably assembled on the body (22; 30) supporting them.
6. Handle according to one of Claims 1 to 5, characterised in that one coupling part (latch ring 50) is provided with at least one axially directed lug (52), which fits with minimal peripheral clearance between ears (49) on the upper outer area of the other coupling part (latch sleeve 46).
7. Handle according to Claim 6, characterised in that the coupling parts (46, 50) each have four form-locking elements (49; 52) diametrically opposed to one another in pairs, in particular spaced at angles of 90°.
8. Handle according to at least one of Claims 1 to 7, characterised in that the latch ring (50) is guided axially with peripheral attachments (58) in a depression (15) in the lower area of the head (12) of the handle.
9. Handle according to at least one of Claims 1 to 8, characterised in that the latch ring (50) is subjected to upward force by a pressure spring (26) which surrounds the latch sleeve (46) and is supported on the stop (30) at least indirectly - via a cover (28).
10. Handle according to Claim 9, characterised in that the latch unit (20) is subjected to upward pressure from a support spring (25), which surrounds the locking shaft (22) in a stepped hole (18) in the head (12) of the handle.
11. Handle according to one of Claims 1 to 10, characterised in that the latch sleeve (46) is arranged to rotate on a bearing bush (31) of the stop (30) and on a spacer sleeve (24), the latter supporting the neck (14) of the handle.
12. Handle according to one of Claims 1 to 11, characterised in that the latch unit (20) is provided with a pushbutton for operation, which projects upwards or outwards from the head (12) of the handle when in locked position, and allows the arrangement to be unlatched by application of thumb pressure.
13. Handle according to at least one of Claims 1 to 12, characterised in that the latch unit (20) is replaced by a lock unit, which may be locked and unlocked by means of a key, or is combined with such an arrangement.

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