An oven door with a door frame and a door panel

Description

[0001] The present invention relates to an oven door according to the preamble of claim 1.

[0002] An oven requires a window in the oven door, so that the user is able to look inside the oven without opening the oven door. The oven door further should be made of temperature-resistant materials.

[0003] Known oven doors consist usually of several parts. A typical oven door comprises one or more transparent door panels, which are made of glass or transparent plastics. The door panel is integrated in a door frame. Usually the door frame consists of several frame parts and each frame part is provided for one circumferential side of the door panel.

[0004] The production of such an oven door is very complex and generates high costs. The frame parts have to be put together to the door frame. This requires several working steps. Additionally the door panel must be inserted into the door frame before or after putting together the door frame.

[0005] DE 10 2004 002 470 A1 discloses an oven door with a door frame. The door frame includes an injection moulded part enclosing all four circumferential sides of a door panel. In order to attach a further door panel, additional fixing elements are required. The oven door cannot be completely disassembled without destroying the door frame.

[0006] DE 102 02 144 A1 discloses an oven door with a door frame enclosing all four circumferential sides of a door panel. The door frame includes also an injection moulded part. Further door panels must be glued onto the outer side of the door frames.

[0007] EP 0 919 361 A2 discloses the production of an oven door, wherein a frame is injection moulded in a moulding cavity and wherein, at the completion of the injection moulding of the frame, the moulding cavity is partially opened, and a glass panel is moved into the mould into alignment with a channel of the still hot injected frame. A peripheral edge of the panel is maintained in alignment with the channel of the frame as the latter cools. The cooling of the injection moulded frame results in shrinkage thereof which brings the channel into progressive intimate embracing relationship to a peripheral edge of the panel eventually resulting in a unitized peripherally encapsulated unit.

[0008] DE 197 34 959 C1 discloses an oven door including a door frame and a door panel integrated within said door frame. The door frame has a U-shaped form and grips directly an outer portion of the door panel on three circumferential sides of said door panel. The door panel can be separated from the door frame by moving said door panel through the open side of the U-shaped door frame. The open side of the U-shaped door frame is closable by a frame part.

[0009] It is an object of the present invention to provide an oven door mentioned above, which allows a simple and cheap production.

[0010] This object is achieved by the oven door according to claim 1.

• According to the present invention the door panel comprises at least two holes in the outer portion of the door panel, wherein the holes are penetrated or filled by material of the injection moulded part, and wherein at each end portion of the U-shaped door frame at least one of the holes is arranged in the door panel.

[0011] The core idea of the present invention is on the one hand, that the door frame is formed as the one-piece injection moulded part, and on the other hand, that the door frame grips directly the outer portion of the door panel on three circumferential sides. This allows a reduced production process by using the injection moulding. The door frame is produced around the door panel by a single step. The door panel is fixed within the door frame by the same single step. Thus, the door frame and the door panel form a compact unit. By the injection moulding it is not necessary to make any glue operation in order to fix together the door frame and the door panel.

[0012] The holes allow an additional fastening between the door frame and the door panel.

[0013] In particular, the hole is arranged in a corner of the door panel. This allows a big area for a window integrated within the oven door.

[0014] Since at each end portion of the U-shaped door frame at least one of the holes may be arranged in the door panel, the holes in this position increase the stability of the oven door.

[0015] In the preferred embodiment of the present invention the door panel is made of glass.

[0016] Alternatively, the door panel may be made of transparent plastics. In this case the oven door has a very low weight.

[0017] For example, the door frame is formed of a polymer material, preferably a single polymer material.

[0018] Further, the door frame may comprise at least one portion, which is formed as a profile part. The profile part allows a low weight and requires less material.

[0019] Preferably, the outer portion of the door frame is formed as one or more profile parts. This allows an arbitrary contour of the oven door.

[0020] In particular, the oven door is provided for a cooking oven, preferably for domestic use.

[0021] Further the door panel may comprise at least one shied grid in order to screen electromagnetic waves. Thus, the oven door also may be provided for a microwave oven.

[0022] In order to guarantee the screening the electromagnetic waves it may be provided, that the door panel covers the cross-section of the inner space of the microwave oven.

[0023] A method for producing an oven door with at least one door frame and at least one door panel includes the follow-ing steps:

• providing the door panel made of a temperature-resistant material and at least partially of a transparent material, and
• injection moulding of the door frame along three circumferential sides of the door panel, so that the door frame gripes directly least a part of the outer portion of the door panel.

[0024] This method allows a reduced production process by using the injection moulding. The door frame is produced around the door panel by a single step. The door panel is fixed within the door frame by the same single step. Thus, the door frame and the door panel form a compact unit.

[0025] In particular, the method is provided for producing the oven door described above.

[0026] The novel and inventive features believed to be the characteristic of the present invention are set forth in the appended claims.

[0027] The invention will be described in further detail with reference to the drawing, in which

FIG 1

illustrates a schematic front view of a door panel for an oven door according to a preferred embodiment of the present invention,

FIG 2

illustrates a schematic front view the an oven door according to the preferred embodiment of the present invention,

FIG 3

illustrates a section view A-A of the oven door according to the preferred embodiment of the present invention,

FIG 4

illustrates a section view B-B of the oven door according to the preferred embodiment of the present invention,

FIG 5

illustrates a perspective view of the oven door according to a further embodiment of the present invention, and

FIG 6

illustrates a perspective view of the oven door in FIG. 5 from the opposite side according to the further embodiment of the present invention.

[0028] FIG 1 illustrates a door panel 12 for the oven door according to a preferred embodiment of the present invention. The door panel 12 has a substantially rectangular form. In this example the door panel 12 is made of glass. Alternatively, the door panel 12 can be made of other temperature-resistant and transparent materials. For example, the door panel is made of transparent plastics.

[0029] The door panel 12 comprises two holes 14. The holes 14 are arranged in two neighbouring corners of the door panel 12. In this embodiment the holes 14 have a diameter of about 10 mm.

[0030] FIG 2 illustrates a front view of an oven door according to the preferred embodiment of the present invention. The oven door comprises the door panel 12 according to FIG. 1 and a door frame 10. The door frame 10 is formed as a one-piece injection moulded part. The material of the door frame 10 is temperature-resistant. For example, the door frame 10 is formed of a polymer material. Preferably, the door frame 10 is formed of a single polymer material.

[0031] The door frame comprises an inner portion 18 and an outer portion 20. The inner portion 18 grips the door panel 12. The outer portion 20 is formed as a profile part. The door frame 10 with the profile part allows a low weight and requires less material than a massive door frame.

[0032] The door frame 10 is U-shaped and borders three sides of the door panel 12. The holes 14 of the door panel 12 are partially filled with the material of the door frame 10. Within each of the holes 14 is a clearance hole 22 in the inner part 18 of the door frame 10.

[0033] FIG 3 illustrates a section view A-A of the oven door according to the preferred embodiment of the present invention. The section view A-A relates to the corner of the door frame 10. FIG. 3 shows how the inner portion 18 of the door frame 10 grips the door panel 12. The outer portion 20 is formed as the profile part. Additionally, the outer portion 20 may comprise one or more hollow-profile parts.

[0034] FIG 3 shows further, how the holes 14 of the door panel 12 are partially filled with the material of the door frame 10. The clearance hole 22 is arranged coaxially to the hole 14 of the door panel 12.

[0035] FIG 4 illustrates a section view B-B of the oven door according to the preferred embodiment of the present invention. The section view B-B represents the cross-section of the bigger part of the door frame 10. The inner portion 18 of the door frame 10 grips three circumferential sides of the door panel 12. The outer portion 20 is formed as the profile part.

[0036] The structure of the oven door according to the present invention allows a reduced production process by using the injection moulding. The door frame 10 is produced around the door panel 12 by a single step. The door panel 12 is fixed within the door frame by the same single step. The door frame 10 and the door panel 12 form a compact unit. It is not necessary to make any glue operation in order to fix together the door frame and the door panel.

[0037] The oven door according to the present invention may include further door panels 12. The further door panels 12 may be fixed either in the same way as described above or in another suitable way.

[0038] FIG 5 illustrates a perspective view of the oven door 10 according to a further embodiment of the present invention. The oven door 10 according to the further embodiment includes also the door frame 10 and the door panel 12. The door frame 10 encloses three circumferential sides of the door panel 12. In each of the lower corners of the door panel 12 is one hole 14, which is at least partially filled with the material of the door frame 10.

[0039] The outer portion 20 of the door frame 10 includes two profile parts 24 on two opposite sides of said door frame 10. In this example the profile parts 24 are an integrated part of the vertical portions of the door frame 10. The profile parts 24 are provided for supporting one or more further door panels.

[0040] FIG 6 illustrates a perspective view of the oven door 10 of FIG 5 from the opposite side according to the further embodiment of the present invention. FIG. 6 shows partially the profile parts 24 from the inner side.

[0041] For special applications the door panel 12 may comprise one or more additional layers. If the oven door is provided for a microwave oven, then the door panel 12 may comprise a layer formed as a shied grid in order to screen the electromagnetic waves.

List of reference numerals

[0042] 

10

door frame

12

door panel

14

hole

18

inner portion

20

outer portion

22

clearance hole

24

profile part

Claims

1. An oven door including at least one door frame (10) and at least one door panel (12), wherein

- the door panel (12) is integrated within the door frame (10),

- the door frame (10) has a U-shaped form and grips directly an outer portion of at least one door panel (12) on three circumferential sides of said door panel (12) with said U-shaped form,

- the door frame (10) is formed as a one-piece injection moulded part made of a temperature-resistant material,

- the door panel (12) is made of a temperature-resistant material and at least partially of a transparent material,

- the door panel (12) is formed as a substantially rectangular sheet, wherein

- the door panel can be separated in an easy way the from the door frame by moving the door panel through the open side of the U-shaped door frame at a later time,

characterized in, that
the door panel (12) comprises at least two holes (14) in the outer portion of the door panel (12), wherein the holes (14) are penetrated or filled by material (16) of the injection moulded part, and wherein at each end portion of the U-shaped door frame (10) at least one of the holes (14) is arranged in the door panel (12).

2. The oven door according to claim 1,
characterized in, that
the holes (14) are arranged in a corner of the door panel (12), which in particular allows a big area for a window integrated within the oven door, wherein in particular the holes allow an additional fastening between the door frame and the door panel.

3. The oven door according to any one of the preceding claims, characterized in, that
the door panel (12) is made of glass or transparent plastics and/or that the door frame (10) is formed of a polymer material, in particular a thermoplastic material and/or a single polymer material
and/or
characterized in, that
the door frame (10) comprises at least one portion, which is formed as a profile part (18), wherein preferably the outer portion of the door frame (10) is formed as one or more profile parts (18), allowing in particular an arbitrary contour of the oven door.

4. The oven door according to any one of the preceding claims, characterized in, that the oven door is provided for a cooking oven, preferably for domestic use.

5. The oven door according to any one of the preceding claims,
characterized in, that
the door panel (12) comprises at least one shield grid in order to screen electromagnetic waves and/or that the oven door is provided for a microwave oven, wherein preferably the door panel (12) covers the cross-section of the inner space of the microwave oven.

6. The oven door according to any one of the preceding claims, characterized by at least one of the following features:

- the door frame is produced around the door panel by a single step

- the door panel is fixed within the door frame by the same single step

- two of the holes (14) are arranged in two neighbouring corners of the door panel (12)

- the holes (14) have a diameter of about 10 mm.

- the door frame comprises an inner portion (18) which grips the door panel (12) and an outer portion (20) which is formed as a profile part,

- the holes (14) of the door panel (12) are partially filled with the material of the door frame (10),

- in each of the lower corners of the door panel (12) is one hole (14), which is at least partially filled with the material of the door frame (10),

- within each of the holes (14) is a clearance hole (22) in the inner part (18) of the door frame (10), wherein preferably the clearance hole (22) is arranged coaxially to the hole (14) of the door panel (12),

- the outer portion (20) comprises one or more hollow-profile parts,

- the oven door includes further door panels 12, wherein the further door panels (12) are fixed in the same way or in another suitable way,

- the outer portion (20) of the door frame (10) includes two profile parts (24) on two opposite sides of said door frame (10),

- the profile parts (24) are an integrated part of the vertical portions of the door frame (10) and the profile parts (24) are provided for supporting one or more further door panels.

Ansprüche

1. Ofentür mit mindestens einem Türrahmen (10) und mindestens einem Türblatt (12), wobei

- das Türblatt (12) in dem Türrahmen (10) integriert ist,

- der Türrahmen (10) eine U-förmige Gestalt aufweist und einen äußeren Abschnitt mindestens eines Türblatts (12) auf drei Umfangsseiten des Türblatts (12) mit der U-förmigen Gestalt direkt einspannt,

- der Türrahmen (10) als einteiliges Spritzgussteil ausgebildet ist, das aus einem temperaturbeständigen Material besteht,

- das Türblatt (12) aus einem temperaturbeständigen Material und zumindest teilweise aus einem transparenten Material besteht,

- das Türblatt (12) als im Wesentlichen rechteckiges Flächenstück ausgebildet ist, wobei

- das Türblatt auf einfache Weise vom Türrahmen getrennt werden kann, indem das Türblatt zu einem späteren Zeitpunkt durch die offene Seite des U-förmigen Türrahmens bewegt wird,

dadurch gekennzeichnet, dass
das Türblatt (12) mindestens zwei Löcher (14) im äußeren Abschnitt des Türblatts (12) umfasst, wobei die Löcher (14) von Material (16) des Spritzgussteils penetriert oder ausgefüllt werden, und wobei an jedem Endabschnitt des U-förmigen Türrahmens (10) mindestens eines der Löcher (14) im Türblatt (12) angeordnet ist.

2. Ofentür nach Anspruch 1,
dadurch gekennzeichnet, dass
die Löcher (14) in einer Ecke des Türblatts (12) angeordnet sind, was insbesondere eine große Fläche für ein in die Ofentür integriertes Fenster gestattet, wobei die Löcher insbesondere eine zusätzliche Befestigung zwischen dem Türrahmen und dem Türblatt gestatten.

3. Ofentür nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet, dass
das Türblatt (12) aus Glas oder transparentem Kunststoff besteht und/oder der Türrahmen (10) aus einem Polymermaterial, insbesondere einem thermoplastischen Material und/oder einem einzelnen Polymermaterial gefertigt ist,
und/oder
dadurch gekennzeichnet, dass
der Türrahmen (10) mindestens einen Abschnitt umfasst, der als ein Profilteil (18) ausgebildet ist, wobei der äußere Abschnitt des Türrahmens (10) vorzugsweise als ein oder mehrere Profilteile (18) ausgebildet ist, was insbesondere eine willkürliche Kontur der Ofentür gestattet.

4. Ofentür nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Ofentür für einen Kochherd, vorzugsweise zur Anwendung im Haushalt bereitgestellt ist.

5. Ofentür nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet, dass
das Türblatt (12) mindestens ein Abschirmgitter zum Filtern elektromagnetischer Wellen umfasst und/oder dass die Ofentür für einen Mikrowellenherd bereitgestellt ist, wobei das Türblatt (12) vorzugsweise den Querschnitt des Innenraums des Mikrowellenherds abdeckt.

6. Ofentür nach einem der vorhergehenden Ansprüche, gekennzeichnet durch mindestens eines der folgenden Merkmale:

- der Türrahmen wird in einem einzelnen Schritt um das Türblatt produziert,

- das Türblatt wird in demselben einzelnen Schritt im Türrahmen befestigt,

- zwei der Löcher (14) sind in zwei benachbarten Ecken des Türblatts (12) angeordnet,

- die Löcher (14) haben einen Durchmesser von etwa 10 mm,

- der Türrahmen umfasst einen inneren Abschnitt (18), der das Türblatt (12) einspannt, und einen äußeren Abschnitt (20), der als Profilteil ausgebildet ist,

- die Löcher (14) des Türblatts (12) sind teilweise mit dem Material des Türrahmens (10) ausgefüllt,

- in jeder der unteren Ecken des Türblatts (12) befindet sich ein Loch (14), das zumindest teilweise mit dem Material des Türrahmens (10) ausgefüllt ist,

- in jedem der Löcher (14) befindet sich ein Durchgangsloch (22) im Innenteil (18) des Türrahmens (10), wobei das Durchgangsloch (22) vorzugsweise koaxial zum Loch (14) des Türblatts (12) angeordnet ist,

- der äußere Abschnitt (20) umfasst ein oder mehrere Hohlprofilteile,

- die Ofentür weist weitere Türblätter (12) auf, wobei die weiteren Türblätter (12) auf dieselbe Weise oder auf eine andere geeignete Weise befestigt sind,

- der äußere Abschnitt (20) des Türrahmens (10) weist zwei Profilteile (24) auf zwei gegenüberliegenden Seiten des Türrahmens (10) auf,

- die Profilteile (24) sind ein integrierter Bestandteil der vertikalen Abschnitte des Türrahmens (10) und die Profilteile (24) sind zur Unterstützung von einem oder mehreren weiteren Türblättern bereitgestellt.

Revendications

1. Porte de four comprenant au moins un cadre de porte (10) et au moins un panneau de porte (12),

- le panneau de porte (12) étant intégré à l'intérieur du cadre de porte (10),

- le cadre de porte (10) présentant une forme en U et venant en prise directement avec une partie extérieure d'un ou de plusieurs panneaux de porte (12) sur trois côtés circonférentiels dudit panneau de porte (12) avec ladite forme en U,

- le cadre de porte (10) étant réalisé sous la forme d'une pièce moulée par injection monobloc, constituée d'un matériau à résistance thermique,

- le panneau de porte (12) étant constitué d'un matériau à résistance thermique et au moins partiellement d'un matériau transparent,

- le panneau de porte (12) étant réalisé sous la forme d'une plaque essentiellement rectangulaire,

- le panneau de porte pouvant être séparé de manière aisée du cadre de porte en déplaçant ultérieurement le panneau de porte à travers le côté ouvert du cadre de porte en forme de U,

caractérisée en ce que
le panneau de porte (12) comprend au moins deux trous (14) dans la partie extérieure du panneau de porte (12), les trous (14) étant partiellement ou entièrement remplis de matériau (16) de la pièce moulée par injection, et au moins un des trous (14) étant disposé dans le panneau de porte (12) au niveau de chaque partie d'extrémité du cadre de porte (10) en forme de U.

2. Porte de four selon la revendication 1,
caractérisée en ce que
les trous (14) sont disposés dans un coin du panneau de porte (12), ce qui laisse en particulier une grande région pour une fenêtre intégrée à l'intérieur de la porte de four, les trous permettant en particulier une fixation supplémentaire entre le cadre de porte et le panneau de porte.

3. Porte de four selon l'une quelconque des revendications précédentes,
caractérisée en ce que
le panneau de porte (12) est constitué de verre ou de matière plastique transparente et/ou en ce que le cadre de porte (10) est constitué d'un matériau polymère, en particulier d'un matériau thermoplastique et/ou d'un seul matériau polymère, et/ou
caractérisée en ce que
le cadre de porte (10) comprend au moins une partie, qui est réalisée sous la forme d'une partie profilée (18), la partie extérieure du cadre de porte (10) étant de préférence réalisée sous la forme d'une ou plusieurs parties profilées (18), ceci permettant en particulier d'obtenir un contour arbitraire de la porte de four.

4. Porte de four selon l'une quelconque des revendications précédentes, caractérisée en ce que la porte de four est prévue pour un four de cuisson, de préférence pour un usage domestique.

5. Porte de four selon l'une quelconque des revendications précédentes, caractérisée en ce que le panneau de porte (12) comprend au moins une grille de protection afin de filtrer les ondes électromagnétiques et/ou en ce que la porte de four est prévue pour un four à micro-ondes, le panneau de porte (12) recouvrant de préférence la section transversale de l'espace intérieur du four à micro-ondes.

6. Porte de four selon l'une quelconque des revendications précédentes, caractérisée par au moins un des éléments suivants :

- le cadre de porte est formé autour du panneau de porte en une seule étape,

- le panneau de porte est fixé à l'intérieur du cadre de porte par le biais de la même étape unique,

- deux des trous (14) sont disposés dans deux coins voisins du panneau de porte (12),

- les trous (14) présentent un diamètre d'environ 10 mm,

- le cadre de porte comprend une partie intérieure (18) qui se met en prise avec le panneau de porte (12) et une partie extérieure (20) qui est réalisée sous la forme d'une partie profilée,

- les trous (14) du panneau de porte (12) sont partiellement remplis du matériau du cadre de porte (10),

- dans chacun des coins inférieurs du panneau de porte (12) se trouve un trou (14), qui est au moins partiellement rempli du matériau du cadre de porte (10),

- à l'intérieur de chacun des trous (14) se trouve un trou de passage (22) dans la partie intérieure (18) du cadre de porte (10), le trou de passage (22) étant de préférence disposé de manière coaxiale vis-à-vis du trou (14) du panneau de porte (12),

- la partie extérieure (20) comprend une ou plusieurs parties profilées creuses,

- la porte de four comprend d'autres panneaux de porte (12), les autres panneaux de porte (12) étant fixés de la même manière ou d'une autre manière appropriée,

- la partie extérieure (20) du cadre de porte (10) comprend deux parties profilées (24) sur deux côtés opposés dudit cadre de porte (10),

- les parties profilées (24) font partie intégrante des parties verticales du cadre de porte (10) et les parties profilées (24) sont prévues pour supporter un ou plusieurs autres panneaux de porte.

Drawing