DE102011087756A1 - Handle for household appliance door e.g. baking oven door, has handle profile designed as tube, and handle supports made of aluminum, and designed as extruded parts or solid bodies, where supports form hollow space - Google Patents

Abstract

The handle (11) has a handle profile (12) designed as a tube, and handle supports (13) made of metal i.e. aluminum, and designed as extruded parts or solid bodies. The handle supports form a hollow space that extends in a longitudinal axis (L). The hollow space is closed with a stopper, and the handle profile has a notch (19) that extends along the longitudinal axis of the handle profile. A head area (22) of the handle supports is accommodated in the handle profile. A holding area (24) of the handle supports is arranged at an outer side of the handle profile.

Description

The invention relates to a door handle for a household appliance door with handle profile and handle bars. The invention also relates to a household appliance door with such a door handle attached to a door front. The invention is particularly suitable for doors of cooking appliances, e.g. Ovens, microwave ovens, steamers, etc.

There is a door handle of the type mentioned for an oven door with a handle profile made of aluminum, in which handle rests made of plastic outside rest on the handle profile and have a support surface with the handle profile, which is conform to the shape of the surface of the handle profile. With their other side, the handle bars are on a door front of the oven door. To fasten the door handle, a screw through the front of the door, a continuous bore of the handle block and a hole in the handle profile is performed. The screwing takes place by means of an internal thread of the bore located in the handle profile, so that the handle block between the handle profile and the door front is clamped and is supported against bending by the screw. However, such a structure can be assembled only with a comparatively high cost and can be mounted on the front of the door and, moreover, can only be varied in its shape with considerable effort. Also, the cost of providing tooling to make the handlebars is high.

It is the object of the present invention to overcome the disadvantages of the prior art at least partially and in particular to provide a way to provide a stable and inexpensive to produce door handle of the type mentioned.

This object is achieved according to the features of the independent claims. Preferred embodiments are in particular the dependent claims.

The object is achieved by a door handle for a household appliance door with a handle profile and two handle bars, wherein the handle block is made of metal. This embodiment allows a much cheaper manufacture of the handle blocks as in a production of plastic, in particular with regard to an investment in tools for the production of the handle. The use of a metal also supports the usability of the door handle, as it allows a particularly high rigidity and strength. This in turn prevents bending of the handlebars under load reliably and long-term stability, even if no continuous screw stabilizes the respective handle. In addition, a displacement of material of the handle in the insertion area due to an alternating load application by the handle profile (which would narrow the insertion area) can be effectively prevented. These advantages are particularly maintainable in the long term.

It is an embodiment that the handle bars are made of aluminum. Aluminum is very light and easy to work with. In addition, aluminum can be processed very easily, in particular molds. In addition, aluminum is resistant to corrosion.

As an alternative to aluminum, the handlebars can e.g. also made of stainless steel.

It is still an embodiment that the handle blocks are extruded parts, in particular extruded profiles. By extruding metals, especially aluminum, can be brought into various forms at low cost for tools.

It is a further embodiment that the handle bars are solid body. This allows a particularly stable, easy to manufacture and easy to clean handlebar.

It is yet another embodiment that the handle bars each have at least one cavity. Thus, particularly lightweight handle blocks are provided and a high material savings possible. Since the handle bars are made of metal, especially aluminum, the hollow area is stable and stiff enough to allow an unaffected and long-term stable use of the door handle, even with heavy doors.

It is also an embodiment that the at least one cavity has at least one cavity extending in a longitudinal direction, in particular open on both sides. The at least one cavity can thus be at least one cavity extending through in a longitudinal extension.

It is a special embodiment that at least one open on both sides cavity is open at the end. Thus, a "half-timbered appearance" of the sides of the door handle can be represented, which has cavities in cross-section.

It is an alternative to the truss appearance that at least one cavity open on both sides by means of a plug (end) is closed.

It is also an embodiment that the handle bars and the handle profile of a same metal, in particular aluminum or stainless steel, exist. This allows a particularly similar, high-quality optical design of the surface of Handle profile and handlebars. Also, a chemical reaction (corrosion or the like) is prevented at the contact point due to a different electrochemical potential.

It is also an embodiment that the handle bars and the handle profile have an equal treated surface. The uniform treatment, e.g. Surface treatment (brushing, anodizing, etc.) of grip profile and handlebars allows a particularly uniform appearance.

It is still an embodiment that the handle profile in each case one on an open end side attaching, extending along a longitudinal extent of the handle profile recess having two opposite longitudinal sides and a longitudinal sides terminating transverse side, wherein a head portion of the handle is at least partially housed in the handle profile and is kept free of play perpendicular to the longitudinal extension by the handle profile, wherein an insertion region of the handle is at least partially inserted into the recess, is held backlash by the longitudinal sides of the recess in a circumferential direction to the longitudinal extent and the transverse side of the recess as a stop for the insertion area in the longitudinal direction serves, and wherein a mounting portion of the handle block outside the handle profile for attaching the door handle is present.

The handle profile thus has an accessible from the open end sides of the cavity in which the head portion is at least partially inserted. Consequently, the handle profile can also be called tubular (at least in its end regions). The handle profile may in particular be a sheet metal part. The sheet metal part may in particular be a workpiece produced by pressure forming, in particular by an extrusion process.

In other words, a handle block consists of a head region, an insertion region and a holding region, which in particular can be designed as a one-piece component. The handle block typically has a fastener for attachment to the household appliance door, in particular a screw hole into which a screw passed through a front panel of the household appliance door can be screwed. The screw hole is provided in particular on a bearing surface with the household appliance door or its front panel. The bearing surface with the household appliance door lies in particular on an end of the holding area facing away from the head area. The screw hole may have an internal thread, in particular if the handle is made of metal. Alternatively, the screw hole may not initially have an internal thread, especially in a plastic handle frame, where the internal thread is first cut by the (e.g., self-tapping) screw.

The head area can be wider for play-free support, in particular at a transition to the insertion area than the insertion area and thus the recess, so that slipping out of the cavity through the recess is reliably prevented and instead the handle profile the head area at least against sliding out of a positive fit in the cavity holds.

The insertion region has, at least in sections, a height which corresponds at least approximately to the width of the recess defined by the longitudinal sides, so that the grip block can not execute any rotational movement in the circumferential direction (with respect to the longitudinal orientation). The longitudinal sides thus act as stops against a rotatability of the associated handle or its lateral displaceability.

By the transverse side of a displacement of the handle block is defined in the grip profile defined and thus serves as a stop in the insertion direction of the handle. Since the handle bars are arranged on both sides of the profile and block a displacement of the handle profile in opposite sides, the handle profile is thus fixed in the longitudinal extension of the handle bars or kept free of play.

Overall, a firm, backlash-free arrangement of the handle profile is achieved on the handle bars without a significant relative movement to each other, without the handle bars must be bolted to the handle profile or otherwise additionally attached. This allows for a simplified construction of the door handle easier assembly.

It is a further advantage that a recess can basically be introduced into gripping profiles of different shape in the same way (i.e., in particular with the same tool), which also supports cost-effective production of (in particular on the outside) differently shaped door handles. The costs are particularly low, if the cavity can keep its shape at least in the region of the recess, since this way the possibility is provided, same handle blocks for outside z.T. to provide significantly different grip profiles.

It is a development that the handle block ends flush with the handle profile end. This allows easy cleanability. In addition, a uniform appearance is achieved, especially if the handle profile and the handle block made of the same material and / or have experienced in particular a similar surface treatment.

However, it is also possible that the handle block is sunk into the end of the handle profile or protruding from this, e.g. to simplify manufacture, as higher tolerances may be allowed and / or to obtain a design-enhanced appearance, in particular if the handle profile and the handle are made of different materials and / or in particular have a different surface treatment (and thus, for example, a different color, surface texture etc.).

It is also an embodiment that the recess is an elongated rectilinear recess. This facilitates introduction of the handle and supports a security against rotation of the handle in the handle profile. However, the recess may also have a different shape, e.g. a square shape or a rectilinear but elongated shape with pointed or rounded corners.

It is still an embodiment that the recess is a cutout. As a result, a simple tube can be used as the starting workpiece for the production of the handle profile and processed by a simple and precise milling process, especially if the handle profile is made of metal. However, other material removing methods for machining the recess, such as laser cutting, etc., may be used.

It is also an embodiment that an outer contour of the head region corresponds to an inner contour of the grip profile in cross section at least in sections. Thus, a positive insertion of the handle block into the cavity of the handle profile at these sections can be achieved in a simple manner.

It is a further development that the outer contour of the head region of the inner contour of the handle profile (at least substantially) corresponds, the head region so at least substantially completely fills the handle profile over its length. Thus, a perpendicular to the longitudinal extent of the handle profile on all sides play-free mounting of the head portion can be achieved in the handle profile. However, the outer contour, e.g. for material saving, in cross-section (i.e., perpendicular to the longitudinal extent), for example, also have one or more recesses.

It is still a further development that the inner contour of the grip profile has inwardly projecting projections (for example ribs extending in the longitudinal direction), which allows an even better fixation, in particular with respect to a rotation.

It is a further embodiment that the inner contour of the handle profile with respect to the longitudinal extent is at least rotationally symmetrical. As a result, the same handle block can be used at every offset offset by a symmetry angle.

It is a development that the inner contour of the handle profile is a circular cross-section inner contour. Thereby, the recess can be introduced at any circumferential position of the handle profile while the same handle block be used. This supports a flexible orientation of the door handle at low cost.

It is yet another embodiment that the insertion area and the holding area are formed as a common plate-shaped area. In other words, the insertion area and the holding area may be (imaginary) adjacent portions of a uniformly shaped plate. The plate may in particular be a cuboidal plate (in particular with a constant height or thickness). This allows a particularly simple production.

Alternatively, the holding area may at the transition to the insertion region have a height or thickness which is greater than the width of the recess and thus also of the insertion region. As a result, an outside positive closure to the recess is created, which prevents insertion of the handle block in the cavity, if not already prevented by the head area. The insertion region can therefore have a narrower height or thickness in cross-section, in particular compared to the adjacent head region and holding region, or in other words represent a constricted region.

The task is also solved by a suitably designed handle block. The object is also achieved by a household appliance door with a door handle attached to a door front as described above. This appliance door has the same advantages as the door handle.

The object is also achieved by a household appliance with at least one household appliance door as described above. The household appliance may in particular be a kitchen appliance, in particular a cooking appliance such as an oven, a microwave oven and / or a steam cooker. However, the home appliance door may also be a door of a kitchen appliance sterilizer, a refrigerator, etc.

In the following figures, the invention will be described schematically with reference to exemplary embodiments. In this case, the same or equivalent elements may be provided with the same reference numerals for clarity.

1 shows an oblique view of a handle profile with an inserted and a free handle frame of a door handle according to a first embodiment;

2 shows a side view of a handle block according to the first embodiment;

3 shows a side view of the handle profile according to the first embodiment;

4 shows a side view of the handle profile with the inserted handle block;

5 shows a side view of a handle profile according to a second embodiment;

6 shows a side view of a handle block according to a third embodiment;

7 shows an oblique view of a handle profile with an inserted and a free handle frame according to a fourth embodiment; and

8th shows an oblique view of a handle profile with an inserted and a free handle block according to a fifth embodiment.

1 shows an oblique view of a handle profile 12 made of aluminum with one inserted and one free handle 13 (also made of aluminum) a door handle 11 according to a first embodiment. 2 shows the handlebar 13 in side view. 3 shows the handle profile 12 in side view. 4 shows the door handle 11 with the handle profile 12 and the handlebar inserted therein 13 in side view. The door handle 11 is intended for attachment to a household appliance door in the form of a cooking appliance door T, in particular on a front panel F thereof.

The handle profile 12 is formed as a straight, along a longitudinal axis L extending tube having a hollow cylindrical basic shape. The handle profile 12 More specifically, in cross-section (perpendicular to the longitudinal extent or longitudinal axis L) has a circular inner contour 14 and a predominantly circular outer contour 15 with a top side flattened side 16 on. The inner contour 14 limits a continuous cavity 17 , An open end edge or end side 18 of the handle profile 12 is deflected or cut perpendicular to the longitudinal axis L.

From each of the open end pages 18 from fitting is in each case a recess in the form of a straight, elongated cutout 19 in the handle profile 12 brought in. The cutout 19 runs in the circular area of the outer contour 15 , parallel to the longitudinal axis L. The cutout 19 has a constant width b except for its rounded tip (see 2 ) and has two opposite, parallel longitudinal sides 20 as well as one the long sides 20 final transverse side 21 (which also the tip of the cutout 19 forms).

From the open end side 18 out of the handlebar 13 in the handle profile 12 be inserted. To this end, designed as a one-piece solid body handle 13 a cylindrical head area 22 , one to the head area 22 centered subsequent insertion area 23 and one to the slot area 23 opposite of the head area 22 subsequent mounting area 24 on. The insertion area 23 and the mounting area 24 have the same plate-like basic shape (and in particular the same, constant height h) and can be used as a common, similarly shaped combination area 23 . 24 be understood. Between the insertion area 23 and the mounting area 24 There is thus no perceptible transition. The handlebar 13 is formed as a total along the longitudinal axis L rectilinear parallel-displaced extrusion of the same cross-sectional shape.

The mounting area 24 points (as in particular in 2 shown) at its the insertion area 23 facing away, free bearing side 25 a screw hole 26 with internal thread for screwing to the front panel F of the cooking appliance door T, in particular of glass, on.

In the in 4 shown used or inserted state close the open end pages 18 of the handle profile 12 and a deck area 27 of the handlebar 13 flush with the surface.

A circular outer contour 28 of the head area 22 corresponds essentially to the inner contour 14 of the handle profile 12 so that the head area 22 perpendicular to the longitudinal axis (longitudinal extension) L backlash-free (and so without a wobble or similar) in the cavity 17 can be held. In particular, such an insertion as well as a sliding out of the head area 22 through the recess 19 prevented.

The insertion area 23 is in the recess 19 pushed in, and gets through the long sides 20 the recess 19 kept free of play in a circumferential direction to the longitudinal axis L. This may cause the grip profile 12 not around the longitudinal axis L against the head area 22 twist. The transverse side 21 of the recess 19 serves as a stop for the insertion area 23 in the direction of insertion along the longitudinal axis L. The mounting area 24 is outside the handlebar 13 and can be used to attach the door handle 11 be connected to the front panel F.

Overall, therefore, need to attach the handle profile 12 only the handlebars 13 to be inserted at the end. Other fasteners are not needed because the handle profile 12 from the handlebars 13 with respect to a movement along the longitudinal axis L, perpendicular to the longitudinal axis L and in the circumferential direction about the longitudinal axis L is kept free of play. The use of a metal (here: aluminum, alternatively, for example, stainless steel, etc.) as a material of the handle bars 13 supports the usability of the door handle 11 because it provides a particularly high rigidity and strength. This, in turn, will bend the handlebars 13 Reliably and long-term stable prevented under load, and as in the present embodiment, even if no continuous screw the respective handle block 13 stabilized. In addition, so a displacement of material of the handlebar 13 in the slot area 23 due to an alternating load application by the handle profile 12 (Which cancel the freedom of play in the circumferential direction and a wobble of the profile handle 12 could cause a rotation) effectively prevented. These advantages are particularly maintainable in the long term. For an inexpensive production, the handle profile 12 and the handlebars 13 manufactured as extruded parts. The handle profile 12 and the handlebars 13 For example, for a uniform appearance, they may have the same finish, eg anodized.

5 shows in side view the handle profile 12 in a second, alternative embodiment, wherein now the recesses 19 in the flattened side 16 of the handle profile 12 are introduced. Because the inner contour 14 of the handle profile 12 is circular in cross-section, the same handle block 13 be used. Different door handles with differently aligned handle profiles 12 Consequently, they can be manufactured with the same tools, which enables a cost-effective, varied production of door handles.

6 shows in side view a handle block 31 according to a third embodiment. Here, the header area points 32 a spherical cap shape that is smaller than a hemisphere. This could be the handlebar 31 in the cavity 17 of the handle profile 12 be inserted. The perpendicular to the longitudinal axis L play-free holder is thus so only in one direction, namely in the direction of the recess 19 , given. To prevent insertion, there is a height h of the support portion 34 now larger than a width b of the recess 19 , So is a play-free positive connection of the handle profile 12 opposite the mounting area 34 reached, the insertion of the handle 13 in the handle profile 12 prevented. The insertion area 33 is therefore narrower than the adjoining header area 32 and mounting area 34 ,

7 shows an oblique view of a door handle 41 with a handle profile 42 and two handlebars, of which only one handlebar 43 in one in the handle profile 42 inserted or inserted state is shown.

The handle profile 42 now has no rotational or rotationally symmetrical cross-sectional shape, but with respect to an inner contour 44 and outer contour 45 spherical-like basic shape with a slightly curved cutting line 46 , The head area 47 of the handlebar 43 has a corresponding outer contour 48 with substantially the same size.

8th shows an oblique view of a door handle 51 with a handlebock 53 similar to the handlebar 42 , However, the handlebar is 53 partially hollow with a along the longitudinal axis L extending, open on both sides cavity 54 , The cavity 54 is located in the header area 62 , the insertion area 63 and a part of the mounting area 64 of the handlebar 52 , One of the door front F facing end portion of the support portion 64 On the other hand, it is fully formed to easily open the screw hole 26 to be able to record.

Such a grip profile 52 is particularly light, saves material and (if left open) allows a "half-timbered appearance". Since the handlebar 53 Made of aluminum, the hollow area is stable and stiff enough to use an unaffected and long-term stable use of the door handle 51 even with heavy doors to allow. Alternatively, in the cavity 54 a plug for lateral completion of the door handle 51 be used.

Of course, the present invention is not limited to the embodiments shown.

The handle block with the head region which is circular in cross section may thus also be hollow with at least one cavity which is open on both sides and extends along the longitudinal axis or longitudinal extent.

LIST OF REFERENCE NUMBERS

11

 door handle

12

 handle profile

13

 handle Bock

14

 Inner contour of the handle profile

15

 Outer contour of the handle profile

16

 flattened page

17

 cavity

18

 End side of the handle profile

19

 countersink

20

 long side

21

 transverse side

22

 head area

23

 insertion region

24

 holding area

25

 support side

26

 screw

27

 cover surface

28

 Outer contour of the head area

31

 handle Bock

32

 head area

33

 insertion region

34

 holding area

41

 door handle

42

 handle profile

43

 handle Bock

44

 Inner contour of the handle profile

45

 Outer contour of the handle profile

46

 line of intersection

47

 head area

48

 Outer contour of the head area

51

 door handle

53

 handle Bock

54

 cavity

62

 head area

63

 insertion region

64

 holding area

T

 cooking appliance

L

 longitudinal axis

F

 front panel

b

 width

Claims (11)

Door handle ( 11 ; 41 ; 51 ) for a household appliance door (T) with a handle profile ( 12 ; 42 ) and two handlebars ( 13 ; 31 ; 43 ; 53 ), characterized in that the handle bars ( 13 ; 31 ; 43 ; 53 ) consist of metal. Door handle ( 11 ; 41 ; 51 ) according to claim 1, characterized in that the handle bars ( 13 ; 31 ; 43 ; 53 ) consist of aluminum. Door handle ( 11 ; 41 ; 51 ) according to claim 2, characterized in that the handle bars ( 13 ; 31 ; 43 ; 53 ) Are extrusions. Door handle ( 11 ; 41 ; 51 ) according to one of claims 1 to 3, characterized in that the handle bars ( 13 ; 31 ; 43 ; 53 ) Are solid. Door handle ( 11 ; 41 ; 51 ) according to one of claims 1 to 3, characterized in that the handle bars ( 13 ; 31 ; 43 ; 53 ) each have at least one cavity. Door handle ( 11 ; 41 ; 51 ) according to claim 5, characterized in that the at least one cavity has at least one in a longitudinal direction (L) extending, open on both sides cavity. Door handle ( 11 ; 41 ; 51 ) according to one of claims 5 or 6, characterized in that at least one cavity open on both sides is open at the end. Door handle ( 11 ; 41 ; 51 ) according to one of claims 5 or 6, characterized in that at least one open on both sides cavity is closed with a plug. Door handle ( 11 ; 41 ; 51 ) according to one of the preceding claims, characterized in that the grip profile ( 12 ; 42 ) and the handlebars ( 13 ; 31 ; 43 ; 53 ) consist of the same metal and in particular have an equal treated surface. Door handle ( 11 ; 41 ; 51 ) according to one of the preceding claims, characterized in that - the grip profile ( 12 ; 42 ) one each at an open end side ( 18 ), along a longitudinal extent (L) of the handle profile ( 12 ; 42 ) extending recess ( 19 ) with two opposite longitudinal sides ( 20 ) and one the long sides ( 20 ) final transverse side ( 21 ), that - a header area ( 22 ; 32 . 47 ; 62 ) of the handle ( 13 ; 31 ; 43 ; 53 ) at least in sections in the handle profile ( 12 ; 42 ) and by the handle profile ( 12 ; 42 ) perpendicular to the longitudinal extent (L) is kept free of play, that - an insertion area ( 23 ; 33 ; 63 ) of the handle ( 13 ; 31 ; 43 ; 53 ) at least in sections in the recess ( 19 ) is pushed through the longitudinal sides ( 20 ) of the recess ( 19 ) in a circumferential direction to the longitudinal extent (L) is kept free of play and the transverse side ( 21 ) of the recess ( 19 ) as a stop for the insertion area ( 23 ; 33 ; 63 ) in the longitudinal extent (L), and that - a holding area ( 24 ; 34 ; 64 ) of the handle ( 13 ; 31 ; 43 ; 53 ) outside the handle profile ( 12 ; 42 ) for fastening the door handle ( 11 ; 41 ; 51 ) is available. Household appliance door (T), in particular cooking appliance door, with a door handle fastened to a door front (F), characterized in that the door handle is a door handle ( 11 ; 41 ; 51 ) according to any one of the preceding claims.

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