Mounting device for a window handle

Abstract

The invention relates to a handle assembly with a base body 3, which has a bearing bore 5 for supporting a handle bushing 6 of a handle 1. The handle bushing 6 is arranged centrally on a connecting line L between two mounting bushings 31, each forming a mounting bore 4. The handle bushing 6 has detent recesses 7 into which a detent head 9 of a detent element 8 engages, the detent head being displaceable along the connecting line L against the restoring force of a spring element 30. To make the base body 3 as narrow as possible, the detent element 8 is formed by a slider having sliding surfaces 19' extending in a plane and guided on guide surfaces 10 of the base body 3. Furthermore, the detent head 9 protrudes from an inwardly curved front face 23 of the slider.

Description

Field of TechnologyThe invention relates to a device for fastening a handle to a window frame, having a base body which has a bearing bore for bearing a handle bushing of the handle, which bearing bore is arranged centrally on a connecting line between two fastening bushings which each form a fastening bore, wherein the handle bushing has latching recesses into which a latching head of a latching element, which can be displaced along the connecting line counter to the restoring force of a spring element, engages,Prior ArtA handle arrangement for fastening to a window frame is described by DE 203 14 279 U1. A base body has a bearing bush which forms a bearing bore which supports a fastening bush which forms four latching recesses which are each arranged offset by 90°, into which a latching head of a spring-loaded latching element can enter in order to latch the handle in switching positions offset by 90° with respect to one another. The latching element is formed by a leaf spring which has a projection which can be displaced along a connecting line between two fastening cams.DE 10 2006 009 371 A1 describes a handle arrangement for fastening to a window frame, in which the latching element is a ball which is acted upon by a helical compression spring. The path of movement of the ball runs at an acute angle to the connecting line of two fastening bores.SUMMARY OF THE INVENTIONThe invention is based on the object of further developing a device of the generic type in such a way that its width is as small as possible, so that the device can be fitted to narrow window frames.The object is achieved by the invention specified in the claims, wherein the dependent claims are not only advantageous refinements of the device specified in the main claim, but also form independent solutions to the object.First and essentially, it is proposed that the latching element is a slide and the base body forms guide elements on which the slide is guided. The slide has one or more slide surfaces of the base bodies, guide surfaces formed by the guide elements. The sliding surfaces and the guide surfaces cooperate with one another in such a way that the slide is guided in an non-rotatable manner. In addition, the sliding surfaces can also extend so far in the direction of movement of the slide that a cavity is formed between two sliding surfaces facing away from one another, in which cavity a region of the spring element can lie. The slide is in particular configured such that the spring element engages into the body formed by the slide. According to a further development of the invention, the spring element is a compression spring and in particular a helical compression spring. The spring element can be supported with a first end on the bearing bush and with a second end on a rear side of the latching head of the slider. A guide element for guiding the slide can be a rib running along the connecting line or parallel to the connecting line between two fastening bores. Preferably, the guide element is a receiving cavity. The slide can have two guide walls pointing away from one another, which form the sliding surfaces which slidingly abut walls of the receiving cavity. The guide elements can thus be formed by walls of two guide webs delimiting a receiving cavity. In a further development of the invention, it can be provided that the bearing bush, which surrounds the bearing bore for mounting the fastening bush, has an aperture through which the latching head of the latching element can pass. This through-opening is particularly preferably formed by a section of a window. A further portion of the window can be arranged in the region of a bottom of the receiving cavity. This angular window additionally enables simplified demolding of the plastic base body produced by the injection molding process. It can furthermore be provided that a protrusion of the latching head is located in the section of the window extending in the region of the base. The receiving cavity extends as far as an outer wall of the bearing bush. The outer wall of the bearing bush is opposed by an outer wall of a fastening bush which surrounds the fastening bore. A projection can protrude from this outer wall, which can engage in the cavity of the helical compression spring. The bottom of the receiving cavity can have a window in this region, which likewise simplifies the demolding of the molded part. The slide can be formed as a plastic part and has two concavely rounded ends pointing away from one another. One of the ends forms a rear side which is matched in shape to the outer wall of the fastening bushing. The other end forms a front side which is matched in shape to the outer wall of the bearing bush. The rear side is open to a cavity of the slide in which the spring element can be received. The rear side of the latching head likewise forms a projection which can enter the cavity of the helical compression spring. The two projections engaging in the cavity of the helical compression spring can form oblique end faces on which the spring element can slide during assembly. The cavity is formed by two walls, the outer side of which can slidingly abut the guide surfaces. The fastening bushes project beyond an open broad side surface of the base body and can be inserted into holes of the window frame. The standard dimension for these bores is 10 mm. The outer diameter of the extensions of the fastening bushes is 8 mm. On the extensions there is a ring with an outer diameter of 10 mm.The mode of operation is as follows: in a latching position, the diametrically opposite latching heads of a respective latching element engage in each case in a respective one of the total of four latching recesses of the handle bushing in order to fix the handle in a pivoted position. The notch has two latching flanks which are at an angle to one another, so that the notch has a trapezoidal shape. The latching head has two latching flanks which are at an angle to one another and which, in the latching position, bear against the latching flanks of the latching recess. The outline of the latching head is trapezoidal. If a torque is applied to the grip bushing, the two latching flanks can slide against one another until the latching head has come out of the latching recess. The spring element supported on the fastening bushing generates the latching force which has to be overcome. As the latching head moves out of the latching recess, the slide moves within the receiving cavity, wherein the outer sides of the walls of the slide slide slide along the guide surfaces. The protrusion of the latching head moves through the window section of the window arranged in the bottom of the receiving cavity. After a 90° rotation, during which an end face of the latching head is supported on a lateral surface of the grip bushing, the latching head can enter the next latching recess by the force of the spring element.Brief Description of the DrawingsAn exemplary embodiment of the invention is explained below with reference to the attached drawings. The following are shown: FIG. 1 is an exploded view of a window handle, FIG. 2 shows the window grip 1 mounted on a window frame 2, FIG. 3 shows a rear view of a base body 3, FIG. 4 is a sectional view taken along the line IV--IV in FIG. 3, FIG. 5 shows a perspective illustration of the base body 3, FIG. 6 shows a perspective illustration of a grip bushing 6, FIG. 7 shows a first perspective illustration of a slide 8, FIG. 8 shows a second perspective illustration of the slide 8, FIG. 9 is a side view of the slide 8, FIG. 10 shows the section along the sectional plane X-X in FIG. 7, FIG. 11 is a bottom view of the slider 8, FIG. 12 is a top view of the slide 8, FIG. 13 shows a representation according to FIG. 3, but with a base body 3 equipped with components; and FIG. 14 shows a representation according to FIG. 4, but with a base body 3 equipped with components.DESCRIPTION OF THE EMBODIMENTSThe figures show a handle arrangement which has a fastening device with which a handle 1 can be fastened to a narrow window frame 2. The length of the fastening device has the standard dimension of 67 mm but a width of at most 20 mm. From an end face of a base body 3, which is designed as an injection-molded part, two cams protrude, each of which forms a fastening bore 4, the center distance of which corresponds to the standard dimension of 43 mm. The diameters of the two cams are 10 mm. The overall height of the fastening device is 10 mm.The base body 3 has two fastening bushes 31, which each form the fastening bores 4. The fastening bushes 31 have extensions 17 which project beyond a wide side surface of the base body 3. The wall thickness of the extensions 17 or of the fastening bushes 31 is 1 mm. In order to achieve the standard diameter of 10 mm of the cam, each of the two extensions 17 carries a ring 18 having an outer diameter of 10 mm.The base body 3 has in its center a bearing bore 5 which is formed by a bearing bush 13. A handle bushing 6 can be mounted in the circular bearing bore 5, which forms a square spindle 26, with which the handle 1 can be fastened to the handle bushing 6. The grip bushing 6 also has four locking recesses 7 which are arranged in a uniform angular distribution about the axis of the grip bushing 6 and which have a trapezoidal cross section.The base body 3 is formed symmetrically or fold symmetrically about an axis of symmetry through the center of the bearing bore 5 with respect to the center of the bearing bore 5.Between the fastening bush 31 and the bearing bush 13 there extends a receiving cavity 12 for receiving a slide 8 which has the function of a latching element. The receiving cavity 12 is bounded by two guide surfaces 10 which extend parallel to a connecting line L between the centers of the fastening bores 4. On this connecting line L there is also the center point of the bearing bore 5.The base body 3 has a circumferential wall which is connected to the fastening bushing 31 via webs 34, so that the fastening bushing 31 is stabilized. The guide surfaces 10 are formed by walls of guide webs 11 facing each other, wherein the guide webs 11 are each connected to one of the stabilizing webs.The receiving cavity 12 has a first boundary formed by an outer wall 25 of the bearing bush 13 and a second boundary formed by an outer wall 24 of the fastening bush 31. In total, two receiving cavities 12 are provided which are opposite each other with respect to the center of the bearing bore 5.In each of the two receiving cavities 12 there is a slide 8 which is formed by a plastics injection-molded part. The slide 8 has a rear side 22, which simulates the contour of the outer wall 24. The slide 8 has a front side 23 opposite the rear side 22, which is reproduced from the contour of the outer wall 25.A latching head 9 projects from the front side 23, which has two latching flanks 9' which are at an angle of 90° with respect to one another. The latching head 9 can enter one of the latching recesses 7. The cross section of the latching head 9 is trapezoidal. The latching head 9 furthermore forms a protrusion 29 which projects beyond the underside of the slide 8 and can enter a section 15'' of a window 15 which is located in the base 12' of the receiving cavity 12.The window 15 has a second portion 15' which is located in the wall of the bearing bush 13. The latching head 9 can pass through this second section 15' in order to enter one of the latching recesses 7. In this case, the rounded front side 23 can abut on the rounded outer wall 25.The slide 8 forming the latching element has a U-shape in cross section. The U-legs are formed by two walls 19, the outer sides of which form sliding surfaces 19' which slidingly abut on the guide surfaces 10 of the guide webs 11. The sliding surfaces 19' are flat surfaces. The sliding surfaces 19' have a rectangular outline. The guide surfaces 10 are also rectangular surfaces. The sliding surfaces 19' thus form two parallel sliding planes which slidingly abut two parallel guide surfaces 10. The slide 8 is thus non-rotatably fitted in the receiving cavity 12. An underside of the slide 19 can likewise form a sliding surface which can slide along the base 12' of the receiving cavity 12.In the cavity 20 of the slide 8 arranged between the walls 19 there is a prestressed helical compression spring 30, which is supported on the one hand on the fastening bushing 31 and on the other hand on the rear side of the latching head 9. The fastening bushing 31 forms a projection 14 and the rear side of the latching head 9 forms a projection 21. The protrusions 14, 21 can enter the cavity of the helical compression spring 30 to fix its position in the cavity 20.The spring element 30 thus extends in a region between the sliding surfaces 19'. The helical compression spring forming the spring element can have a diameter which corresponds to the distance between the two walls 19. The distance of the end face of the spring element from the base of the latching head is thereby minimized.The bottom 12' has a window 16 in the region of the projection 14, and the window 16 and the section 15'' of the window 15 substantially serve to facilitate demolding during the production of the base body 3.The slide 8 can have such a length that the rear side 22 in the release position, in which the latching head 9 has left the latching recess 7, bears against the outer wall 24 of the fastening bushing 31. The displacement path of the slide 8 from its blocking position, in which it engages in the latching recess 7, into the release position is determined substantially by the dimension of the latching head 9 and the depth of the latching recess 7. The bearing position described above is thus a maximum position. In general, the rear side 22 in the release position is at a small distance from the outer wall 24.In order to achieve a secure guidance of the slide 8 between the guide surfaces 10, it is provided in particular that the width of the slide, i.e. the distance between the slide surfaces 19', is greater than half the width of the base body 3.It is considered to be advantageous if the wall thickness of the fastening bushing 31, in particular in the region of the outer wall 24 facing the receiving cavity 12, is reduced compared to the prior art, so that the distance along which the spring element 30 can extend is maximized. It is likewise advantageous if the material thickness of the wall of the latching element from which the latching head 9 protrudes is formed as small as possible. The device according to the invention creates a substructure of a window handle which is distinguished from the prior art in that its width is significantly reduced from the prior art. In order to meet the latching of the rotational positions in accordance with the norm, a latching slide is provided which can engage with a latching head 9 in latching recesses 7 of a rotatably mounted shaft section which is formed by the grip bushing 6.The base body 3 can be arranged in a cover element 27 which can be manufactured from plastic or metal. The cover element 27 can form a trough which accommodates the base body 3. The open broad side of the base body 3 can be closed by a cover plate 28. The cover plate 28 may have three openings. The position of the grip bushing 6 within the bearing bore 5 can be fixed with the edge of a central opening 32 in that the diameter of this central opening 32 is somewhat smaller than the maximum diameter of the grip bushing 6.The cover plate 28 has two outer openings 33 through which the extensions 17 can protrude. It can be provided that these outer openings 33 have a diameter which is only slightly larger than the outer diameter of the extensions 17, so that the cover plate 28 is held with the rings 18 plugged onto the extensions 17. However, it can also be provided that the rings 18 can pass through the openings 33 and the cover plate 28 is fastened to the base body 3 in another way.The above explanations serve to explain the inventions which are covered overall by the application and which develop the prior art in each case also independently at least by the following combinations of features, wherein two, more or all of these combinations of features can also be combined, namely:A device, which is characterized in that the latching element 8 is a slide guided by guide elements 10 of the base body 3.A device, which is characterized in that the spring element 30 is a compression spring, which is supported by a first end on the fastening bushing 31 and lies in a cavity 20 of the slide 8 and the second end of which is supported on a rear side of the latching head 9.A device, which is characterized in that the guide elements 10 are formed by a guide web 11 extending in the direction of the connecting line L.A device, which is characterized in that the guide elements 10 are walls, which point towards one another, of two guide webs 11 delimiting a receiving cavity 12.A device, which is characterized in that a bearing bush 13 forming the bearing bore 5 has an aperture formed by a section 15' of a window 15, through which the latching head 9 reaches and / or that a further section 15'' of the window 15 is arranged in a base 12' of the receiving cavity 12.A device, which is characterized in that the latching head 9 protrudes from an inwardly curved front side 23 of the slide 8.A device, which is characterized in that the fastening bushing 31 forms a projection 14 and the rear side of the latching head 9 forms a projection 21 in each case, which engages in a cavity of the helical compression spring forming the spring element 30, in each case.A device, which is characterized in that the fastening bushes 31 have extensions 17 with a wall thickness of approximately 1 mm, which protrude beyond a boundary plane of the base body 3 and on which a ring 18 is seated, which ring has an outer diameter of 10 mm.A device, which is characterized in that the slide 8 has a rounded rear side 22 and a rounded front side 23, wherein the contour of the rear side 22 is adapted to the contour of an outer wall 24 of the fastening bushing 31 and the contour of the front side 23 is adapted to the contour of an outer wall 25 of the bearing bushing 13.All the features disclosed are essential to the invention (alone, but also in combination with one another). The disclosure of the application hereby also includes the content of the disclosure of the associated / attached priority documents (prior application document), also for the purpose of including features of these documents in claims of the present application. The dependent claims, even without the features of a related claim, characterize with their features independent inventive refinements of the prior art, in particular in order to undertake partial applications on the basis of these claims. The invention as recited in each claim may additionally include one or more of the features recited in the foregoing description, particularly numbered and / or recited in the list of reference numerals. The invention also relates to embodiments in which individual features mentioned in the above description are not realized, in particular insofar as they are noticeably unnecessary for the respective intended use or can be replaced by other technically equivalent means.List of Reference Numerals1 Handle 1' Neck 2 Window frame 3 Base body 4 Fastening bore 5 Bearing bore 6 Handle bushing 7 Locking recess 8 Locking element 9 Locking head 9' Locking flank 10 Guide element, guide surface 11 Guide web 12 Receiving cavity 12' Base 13 Bearing bushing 14 Projection 15 Window 15' Window section 15'' Window section 16 Window 17 Extension 18 Ring 19 Wall 19' Sliding surface 20 Cavity 21 Projection 22 Rear side 23 Front side 24 Outer wall 25 Outer wall 26 Square pin 27 Cover element 28 Cover plate 29 Projection 30 Spring element 31 Fastening bushing 32 Middle opening 33 Outer opening 34 Web L Connecting lineReferences included in the specificationThis list of documents cited by the applicant has been produced in an automated manner and is only included for the better information of the reader. The list is not part of the German patent application or utility model application. The DPMA does not take any adhesion for any faults or omissions.Patent Literature citedDE 203 14 279 U1

[0002] DE 10 2006 009 371 A1

[0003]

Claims

Device for fastening a handle (1) to a window frame (2), having a base body (3) which has a bearing bore (5) for bearing a handle bush (6) of the handle (1), which is arranged centrally on a connecting line (L) between two fastening bushes (31) which each form a fastening bore (4), wherein the handle bush (6) has latching recesses (7) in which a latching head (9) of a latching element (8), which can be displaced along the connecting line (L) counter to the restoring force of a spring element (30), engages, characterized in that the latching element (8) is a slide guided by guide elements (10) of the base body (3).Device according to one of the preceding claims, characterized in that the spring element (30) is a compression spring which is supported by a first end on the fastening bush (31) and lies in a cavity (20) of the slide (8) and the second end of which is supported on a rear side of the latching head (9).Device according to one of the preceding claims, characterized in that the guide elements (10) are formed by a guide web (11) extending in the direction of the connecting line (L).Device according to claim 3, characterised in that the guide elements (10) are walls, which point towards one another, of two guide webs (11) delimiting a receiving cavity (12).Device according to one of the preceding claims, characterized in that a bearing bush (13) forming the bearing bore (5) has an aperture formed by a section (15') of a window (15), through which the latching head (9) reaches and / or in that a further section (15'') of the window (15) is arranged in a base (12') of the receiving cavity (12).Device according to one of the preceding claims, characterized in that the latching head (9) projects from an inwardly curved front side (23) of the slide (8).Device according to one of the preceding claims, characterized in that the fastening bush (31) forms a projection (14) and the rear side of the latching head (9) in each case forms a projection (21) which in each case engages in a cavity of the helical compression spring forming the spring element (30).Device according to one of the preceding claims, characterized in that the fastening bushes (31) have extensions (17) which project beyond a boundary plane of the base body (3) and have a wall thickness of approximately 1 mm and on which a ring (18) is seated which has an outer diameter of 10 mm.Device according to one of the preceding claims, characterized in that the slide (8) has a rounded rear side (22) and a rounded front side (23), wherein the contour of the rear side (22) is matched to the contour of an outer wall (24) of the fastening bushing (31) and the contour of the front side (23) is matched to the contour of an outer wall (25) of the bearing bushing (13).Device, characterised byone or more of the characterising features of one of the preceding claims.

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