EP2532973B1 - Household Appliance - Google Patents
Household Appliance Download PDFInfo
- Publication number
- EP2532973B1 EP2532973B1 EP11004646.3A EP11004646A EP2532973B1 EP 2532973 B1 EP2532973 B1 EP 2532973B1 EP 11004646 A EP11004646 A EP 11004646A EP 2532973 B1 EP2532973 B1 EP 2532973B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- latching
- door
- door latch
- household appliance
- section
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 239000000853 adhesive Substances 0.000 description 2
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- 239000011521 glass Substances 0.000 description 2
- 239000004922 lacquer Substances 0.000 description 2
- 238000007747 plating Methods 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 229910000639 Spring steel Inorganic materials 0.000 description 1
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- 238000001746 injection moulding Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
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Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
- F24C15/00—Details
- F24C15/02—Doors specially adapted for stoves or ranges
- F24C15/022—Latches
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05C—BOLTS OR FASTENING DEVICES FOR WINGS, SPECIALLY FOR DOORS OR WINDOWS
- E05C19/00—Other devices specially designed for securing wings, e.g. with suction cups
- E05C19/06—Other devices specially designed for securing wings, e.g. with suction cups in which the securing part if formed or carried by a spring and moves only by distortion of the spring, e.g. snaps
Definitions
- the invention is directed to a household appliance comprising a door latch.
- Door latches in connection with household appliances are often required to disable unauthorized access to treatment chambers such as baking muffles of baking ovens, washing chambers of dishwashers and the like.
- a door latch for latching the front door of an electronic oven is known for example from DE 81 37 942 U1 showing a double L-shaped bent sheet metal elastic strip with a hook for engaging a latching edge of the door.
- a further latch specifically provided for a door of a dishwasher, is known from DE 10 2006 007 328 A1 .
- the known latch comprises a fixing portion, a latching portion in a middle section and a control lever extending from the middle section.
- the control lever is shifted and offset, with respect to the overall lengthwise direction of the latch, from the fixing portion and from the latching portion.
- Document DE 81 37 042 U1 discloses a latch for a door of a baking oven.
- the latch comprises a strip-like base body with a double-L-shape structure. One end of the base body forms a fixing portion and an averted end of the base body forms a latching portion.
- Document US 2 142 690 A describes a locking arrangement for windows, in which a locking element has several recesses for locking engagement into a counterpart locking element, and in which one end of the locking element has a bent section.
- Document US 2,794,663 discloses a latch for gates or doors, which can be bolted, and, if desired, locked, by a simple shifting operation.
- the known latch employs a flat latch bar which has a 90° twist at an intermediate point so as to provide a vertically disposed bolt section for engaging the catch and the bolt slot, and a horizontally disposed lever section adapted to swing vertically in a fulcrum plate, the lever section is provided with two notches for locating the latch bar in latching or bolting positions.
- a household appliance comprising a front door and a door latch adapted to latch the door in a closed state is provided.
- the door latch comprises a fixing portion adapted and designed for fixing the door latch to the appliance.
- the door latch can for example be fixed to the appliance by one or more screws, by rivets, by welding and similar techniques.
- detachable fixing techniques such as screws, are preferred in cases in which the door latch shall removably and/or temporarily be attached to the appliance.
- the door latch further comprises a latching portion for latching engagement with the door of the appliance, the latching portion comprising a hook-shaped latching element.
- the door latch is designed such that the fixing portion and latching portion are, with respect to the overall lengthwise direction of the door latch, twisted by about 90 degrees.
- the twisted configuration contributes to enhanced mechanical strength and stiffness resulting in refined latching efficiency. Overstretching and decreasing resilience can at least be suppressed.
- Twisted by about 90 degrees shall in particular mean, that planes defined by the latching portion and fixing portion, respectively, are twisted by 90 degrees, i.e. enclose an angle of about 90 degrees, or in other words are rotated, i.e. twisted, with respect to the overall lengthwise direction by about 90 degrees.
- the latching portion and fixing portion are provided at opposite ends of the door latch.
- the overall lengthwise direction is in particular given by a lengthwise or axial direction of an envelope of the door latch, enveloping the whole door latch, in particular the opposite ends of the door latch.
- the door latch comprises a base body which at least comprises the fixing portion and the latching portion, the base body being made as a one-piece part bent sheet-type elastic body made from a flexible and elastic material such that:
- the door latch comprises a hook type latching element, preferably fixed to the latching portion, in particular to a latching tab of the latching portion.
- the tab may be a strap or tongue shaped section of the door latch, projecting therefrom. If the hook type latching element and latching tab are implemented as two parts, the latching element may have a slot into which the tab is or can be inserted. The dimension of the slot and tab may be adapted to one another such that the latching element is safely fixed to the tab.
- the hook type latching element and/or tab can comprise snap or hook elements for snap- connecting the latching element and tab.
- the latching element may be fixed by other means, such for example by adhesive and the like.
- the latching element may be made from plastics, whereas other parts of the door latch may be made from metal, in particular stainless steel, light metals, spring steel and the like, coated metals, in particular enamel coated metals. All or single elements of the door latch may be coated, for example by a lacquer layer, and/or plated, for example with chrome and the like.
- the latching tab projects parallel to the overall lengthwise direction from a, preferably strip shaped, intermediate section which is oriented transversally, in particular in an angle of 90 degrees, to the overall lengthwise direction.
- the latching tab and intermediate section preferably enclose an angle of about 90 degrees.
- the door latch in particular a base body of the door latch can be formed or bent from a single sheet metal strip. This allows easy and cheap manufacture of the door latch. Further, with a transversal intermediate section favorable mechanical strength and stability can be obtained, guaranteeing long-term efficient latching.
- the intermediate section comprises a U-section, i.e.
- the base body is made from metal, in particular metal alloys, and/or plastics. Such a base body can, as already mentioned, be formed as a single sheet metal strip. Such base bodies can be produced in a relative simple and cost efficient way, and the final assembly of the door latch can be greatly simplified.
- the fixing portion has a planar s-type end section preferably having an oblong screw hole for fixing the door latch to the appliance.
- S-type end section in particular shall mean that two sections in the end region of the door latch are offset from each other in a plane defined by the fixing portion itself, and are connected by a curved connector section.
- the S-type end section therefore has an s-bend like geometry.
- a wedge shaped element is attached to the latching tab, in combination making up or resulting in a latching tooth for latching engagement with the door.
- the wedge shaped element can be made from plastics or other suitable materials, in particular by casting or other techniques. Further, the design of the wedge shaped element can be such that it can be snap- connected and/or locked to the latching tab.
- the wedge shaped element and the tab, and therefore in particular the base body are interconnected or interlocked by respective connecting or locking elements.
- the household appliance may be a baking oven.
- the door latch may be mounted and fixed to the appliance and adapted to latch the door in a closed state at an upper or lateral edge of the door.
- the door latch in particular the latching section, in particular the wedge shaped element, can engage a glass and/or decorative element, plate or cover of the door. It is also conceivable that the door latch, in particular the latching section, in particular the wedge shaped element engages a recess provided in the door.
- the door latch is attached to a side-wall of the household appliance, and, in the closed state of the door, the latching portion at least partially projects from a front face of the appliance.
- the latching portion preferably projects through a gap between a lower edge of an upper cover plate and an upper edge of the door.
- the door latch can easily be mounted and removed from the appliance.
- the U-shaped section preferably loosely, engages a respective vertical bar of the appliance.
- the vertical bar may be a protrusion provided at the upper or lateral face side of the appliance, in particular of a casing of the appliance. Such an additional engagement improves latching efficiency and latching strength.
- Fig. 1 shows a sectional view of a baking oven 1 with a door latch 2 mounted thereto.
- the baking oven 1 which is just an example of a household appliance, will be described only in so far as is necessary for fully understanding the invention. Further, the figures are not necessarily true to scale and scales between figures may vary. Throughout the text, like reference signs are used for like elements.
- the baking oven 1 comprises a casing 3, a baking chamber or muffle (not shown) and a front door 4 for closing a front opening of the baking chamber. With the situation in Fig. 1 , the door 4 is in a closed state. Above the door 4, an upper cover plate 5 is provided to which one or several control elements are mounted.
- door latches 2 In connection with door latches 2 it is desirable that they have adequate latching efficiency and can be easily and flexibly attached and detached to the baking oven 1.
- Fig. 1 it can be seen, and it will be described in more detail below, that the door 4 in its closed state is latched by the door latch 2. In this way, unauthorized opening of the door 4 can at least to some extent be blocked and access to the baking chamber can at least be handicapped.
- the door latch 2 comprises a fixing portion 6 adapted and designed for fixing the door latch 2 to the baking oven 1.
- the door latch 2 further comprises a latching portion 7 for latching the door 4.
- the fixing portion 6 and latching portion 7 are, with respect to the overall lengthwise direction D or overall longitudinal axis D of the door latch 2, twisted by about 90 degrees.
- a plane defined by the sheet-like fixing portion 6 and a plane defined by the latching portion 7 enclose an angle of about 90 degrees.
- the twisted configuration of the door latch 2 on the one hand allows simple and flexible attachment to a side wall 8 of the baking oven 1 or casing 3, and on the other hand leads to enhanced operability, latching efficiency and latching strength.
- the door latch 2 comprises a hook type latching element 9 which is plugged on a latching tab 10 of the door latch 2.
- the latching element 9 therefore may have a slot having inner dimensions adapted to the outer dimensions of the latching tab 10 and configured such that the latching tab 10 can be fixedly plugged into the slot.
- the latching element 9 can be secured to the latching tab 10 additionally by snap or latch elements engaging each other upon plugging the latching element 9 on the latching tab 10. Snap or latch elements may for example be provided within the slot and on the surface of the latching tab 10. As an alternative or in addition, it is possible to secure the latching element 10 on the latching tab 10 by adhesive.
- the latching element 9 wedge shape is single sided, i. e. asymmetric with respect to the latching tab 10. More precisely, when mounted on the latching tab 10, one surface, in Fig. 2 the upper surface 11, of the latching element 9 is parallel to the latching tab 10 and the opposite surface, i.e. the lower surface 12, is slanted downwards. The lower surface 12 is slanted in such a way, that a step-like latching projection 13 is formed at the lower side of the door latch 2 in a transitional region between the latching element 9 and latching tab 10.
- the step size of the latching projection 13 can easily be adjusted by appropriately shaping the latching element 9 or by plugging adequate latching elements 9 on the latching tab 10. In this way, a high degree of flexibility and efficient and adequate latching engagement with different types of doors can be obtained.
- the latching tab 10 projects in overall lengthwise direction D from an intermediate section 14.
- the intermediate section 14 comprises a U-section with two legs 15 and a base 16.
- the U-section is oriented transversally to the overall lengthwise direction D, i. e. the base 16 is oriented parallel to the overall lengthwise direction D, the legs 15 are oriented essentially perpendicular to the overall lengthwise direction D and a section opening 17 is directed transversally to the overall lengthwise direction D.
- the latching tab 10 and fixing portion 6 extend from a respective leg 15 in opposite directions in overall lengthwise direction D.
- the latching tab 10 and the intermediate section 14, i. e. the respective leg 15, enclose an angle of about 90 degrees.
- the fixing portion 6 and the intermediate section 14, i. e. the respective leg 15, enclose an angle of about 90 degrees.
- an intersection line between the latching tab 10 and the respective leg 15 of the intermediate section 14 is oriented essentially horizontal. Due to the fact, that the latching tab 10 and fixing portion 6 are twisted by about 90 degrees an intersection line between the respective leg 15 of the intermediate section 14 and the fixing portion 6 is oriented essentially vertical. Note that the terms horizontal and vertical relate to the ordinary mounting position of the door latch 2, which in particular become obvious from Fig. 1 , and 3 to 5 .
- the fixing portion 6 of the door latch 2 has an s-shaped end section 18. Further, the fixing portion 6 comprises an end tab 19 having an oblong screw hole 20.
- the oblong screw hole 20 permits adjusting the mounting position of the door latch 2 parallel to the overall lengthwise direction D, in the present case in horizontal direction.
- the s-shaped section 18 permits vertical offsets between screw hole 20 and latching tab 10. Such vertical offsets, essentially defined by adequate heights of the s-shaped end section 18, may be chosen to best fit respective mounting positions and latching functionality.
- the door latch 2 in more details the base body of the door latch 2, can be formed from a single metal strip bended accordingly.
- the metal strip can be made from stainless steel, standard steel and others. If required, suitable coating, plating and/or finishing can be applied to the base body, such as enamel coating, chrome plating and/or lacquers, respectively.
- the base body is formed from plastics.
- the latching element 9 is preferably made from plastics. In case that the base body is also made from plastics, the base body and latching element 9 can be manufactured as a one-piece part, via injection molding for example.
- Fig. 3 shows an enlarged section of the baking oven 1, in more detail a region to which the door latch 2 is mounted to.
- Fig. 4 shows an enlarged side view of the baking oven 1 in a region of the door latch 2.
- Fig. 5 shows an enlarged front view of the baking oven 1 in a region of the door latch 2.
- the fixing portion 6 is attached to the side wall 8 by a screw 21 passing through the screw hole 20.
- the two-dimensional, i. e. areal, extent of the fixing portion 6 is parallel to the side wall 8.
- the position of the door latch 2 can be adjusted in horizontal direction because the screw hole 20 is implemented as an oblong hole.
- abutment edge 22 moves in horizontal direction of the door latch 2 from a horizontal abutment edge 22 provided on the side wall 8.
- the abutment edge 22 also prevents the door latch 2 from rotating around screw 21.
- an abutment edge 22 is not mandatory as anti-rotation properties can also be obtained by providing two screws and/or similar engagement elements.
- Latching engagement between the door 4 and the door latch 2 is obtained in the present case in an upper section, more precisely an upper edge, of a front pane of the door 4.
- the front pane may be a glass pane and/or any decorative pane mounted or applied to the door 4. Note that any other site of the door 4 can be used and selected for latching engagement.
- the latching tab 10 passes through a gap 23 between an upper edge of the door 4 and a lower edge of the upper cover plate 5.
- the gap is dimensioned such that upon pushing the latching element 9 and latching tab 10 fully upwards, i. e. until the section of the latching tab 10 running within the gap 23 abuts the lower edge of the cover plate 5, the upper edge of the door 4 can pass below the latching projection 13, and the door can be opened.
- the latching projection 13 prevents the door 4 from passing by. In other words, if the door latch 2 is not deflected, the latching projection 13 prevents the door 4 from being opened in that an upper edge of the door 4 abuts the latching projection 13. Hence opening of the door can at least be handicapped.
- the door latch 2, in particular the base body, is made from a flexible and elastic material.
- the latching element 9 is held in latching position as long as no pushing force is applied to the latching portion. If a pushing force acting essentially perpendicular to the overall lengthwise direction and perpendicular to the upper surface 11 is applied to the latching portion 7, the latching portion 7 is elastically deflected. The latching portion 7 returns to the latching position again if the pushing force releases.
- the door latch 2 is shown in Fig. 1 to 5 in the non-deflected configuration only. If deflected, at least the latching tab 10 of the door latch shall be bent. As can be seen from Fig. 3 and Fig.
- additional stability and in particular high latching efficiency of the door latch 2 can be obtained.
- a connection between single components of the door latch 2 and connection between the door latch 2 and the baking oven can be implemented in other or alternative ways as set out beforehand.
- connections can be established not only by screws but also by rivets, bonding techniques, in particular adhesion techniques, welding, fusing, two-component methods and the like.
- the proposed door latch can easily be attached and detached to baking ovens, in more general terms household appliances.
- the proposed door latch can easily be applied to existing appliances.
- the door latch may be composed of just a few components, which in turn can easily be manufactured and assembled. Beyond this, the door latch allows high latching efficiency and is comparatively robust.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- General Engineering & Computer Science (AREA)
- Electric Ovens (AREA)
Description
- The invention is directed to a household appliance comprising a door latch.
- Door latches in connection with household appliances are often required to disable unauthorized access to treatment chambers such as baking muffles of baking ovens, washing chambers of dishwashers and the like.
- A door latch for latching the front door of an electronic oven is known for example from
DE 81 37 942 U1 showing a double L-shaped bent sheet metal elastic strip with a hook for engaging a latching edge of the door. - A further latch, specifically provided for a door of a dishwasher, is known from
DE 10 2006 007 328 A1 . The known latch comprises a fixing portion, a latching portion in a middle section and a control lever extending from the middle section. The control lever is shifted and offset, with respect to the overall lengthwise direction of the latch, from the fixing portion and from the latching portion. - Document
DE 81 37 042 U1 discloses a latch for a door of a baking oven. The latch comprises a strip-like base body with a double-L-shape structure. One end of the base body forms a fixing portion and an averted end of the base body forms a latching portion. - Document
US 2 142 690 A describes a locking arrangement for windows, in which a locking element has several recesses for locking engagement into a counterpart locking element, and in which one end of the locking element has a bent section. - Document
WO 03/018943 A1 - Document
US 2,794,663 discloses a latch for gates or doors, which can be bolted, and, if desired, locked, by a simple shifting operation. The known latch employs a flat latch bar which has a 90° twist at an intermediate point so as to provide a vertically disposed bolt section for engaging the catch and the bolt slot, and a horizontally disposed lever section adapted to swing vertically in a fulcrum plate, the lever section is provided with two notches for locating the latch bar in latching or bolting positions. - In spite of the known door latches there is still need for further refining latching efficiency and ensuring easy assembly in connection with doors of household appliances.
- It is therefore an object of the invention to provide a household appliance with a door latch, having refined latching efficiency and allowing for easy assembly.
- This object is solved by
claim 1. Preferred embodiments result from respective dependent claims. - According to
claim 1, a household appliance comprising a front door and a door latch adapted to latch the door in a closed state is provided. - The door latch comprises a fixing portion adapted and designed for fixing the door latch to the appliance. The door latch can for example be fixed to the appliance by one or more screws, by rivets, by welding and similar techniques. However, detachable fixing techniques, such as screws, are preferred in cases in which the door latch shall removably and/or temporarily be attached to the appliance.
- The door latch further comprises a latching portion for latching engagement with the door of the appliance, the latching portion comprising a hook-shaped latching element.
- Further, the door latch is designed such that the fixing portion and latching portion are, with respect to the overall lengthwise direction of the door latch, twisted by about 90 degrees.
- The twisted configuration contributes to enhanced mechanical strength and stiffness resulting in refined latching efficiency. Overstretching and decreasing resilience can at least be suppressed.
- Twisted by about 90 degrees shall in particular mean, that planes defined by the latching portion and fixing portion, respectively, are twisted by 90 degrees, i.e. enclose an angle of about 90 degrees, or in other words are rotated, i.e. twisted, with respect to the overall lengthwise direction by about 90 degrees.
- In general, the latching portion and fixing portion are provided at opposite ends of the door latch. The overall lengthwise direction is in particular given by a lengthwise or axial direction of an envelope of the door latch, enveloping the whole door latch, in particular the opposite ends of the door latch.
- The door latch comprises a base body which at least comprises the fixing portion and the latching portion, the base body being made as a one-piece part bent sheet-type elastic body made from a flexible and elastic material such that:
- i) the latching element is held in latching position as long as no pushing force is applied to the latching portion,
- ii) if a pushing force acting essentially perpendicular to the overall length-wise direction and perpendicular un upper surface of the latching element is applied to the latching portion, the latching portion is elastically deflected, and
- iii) the latching portion returns to the latching position again if the pushing force releases.
- In the preferred embodiment, the door latch comprises a hook type latching element, preferably fixed to the latching portion, in particular to a latching tab of the latching portion. The tab may be a strap or tongue shaped section of the door latch, projecting therefrom.
If the hook type latching element and latching tab are implemented as two parts, the latching element may have a slot into which the tab is or can be inserted. The dimension of the slot and tab may be adapted to one another such that the latching element is safely fixed to the tab. In a refinement, the hook type latching element and/or tab can comprise snap or hook elements for snap- connecting the latching element and tab. The latching element may be fixed by other means, such for example by adhesive and the like.
In particular with the embodiment mentioned beforehand, the latching element may be made from plastics, whereas other parts of the door latch may be made from metal, in particular stainless steel, light metals, spring steel and the like, coated metals, in particular enamel coated metals. All or single elements of the door latch may be coated, for example by a lacquer layer, and/or plated, for example with chrome and the like. - In the preferred embodiment, the latching tab projects parallel to the overall lengthwise direction from a, preferably strip shaped, intermediate section which is oriented transversally, in particular in an angle of 90 degrees, to the overall lengthwise direction. The latching tab and intermediate section preferably enclose an angle of about 90 degrees. In particular in this configuration, the door latch, in particular a base body of the door latch can be formed or bent from a single sheet metal strip. This allows easy and cheap manufacture of the door latch. Further, with a transversal intermediate section favorable mechanical strength and stability can be obtained, guaranteeing long-term efficient latching.
In a further embodiment, the intermediate section comprises a U-section, i.e. a U-shaped section, wherein a section opening of the U-shaped section is oriented transversally to the overall lengthwise direction. Further, with this embodiment, the latching portion extends from one of the legs of the U-shaped section and the fixing portion extends from the other one of the legs of the U-shaped section in opposite direction to the latching portion. This configuration has excellent stability and elasticity, and further, wear stretch can be greatly reduced.
In a yet further embodiment, the base body is made from metal, in particular metal alloys, and/or plastics. Such a base body can, as already mentioned, be formed as a single sheet metal strip. Such base bodies can be produced in a relative simple and cost efficient way, and the final assembly of the door latch can be greatly simplified.
In a further embodiment, the fixing portion has a planar s-type end section preferably having an oblong screw hole for fixing the door latch to the appliance. S-type end section in particular shall mean that two sections in the end region of the door latch are offset from each other in a plane defined by the fixing portion itself, and are connected by a curved connector section. The S-type end section therefore has an s-bend like geometry. With such design and geometry, in particular of the screw hole, the mounting position and orientation of the door latch can be fine-tuned, which in turn simplifies mounting and secures proper function of the door latch. - In a further embodiment a wedge shaped element is attached to the latching tab, in combination making up or resulting in a latching tooth for latching engagement with the door. The wedge shaped element can be made from plastics or other suitable materials, in particular by casting or other techniques. Further, the design of the wedge shaped element can be such that it can be snap- connected and/or locked to the latching tab. In particular, the wedge shaped element and the tab, and therefore in particular the base body, are interconnected or interlocked by respective connecting or locking elements.
- The household appliance may be a baking oven.
- In embodiments, the door latch may be mounted and fixed to the appliance and adapted to latch the door in a closed state at an upper or lateral edge of the door. The door latch, in particular the latching section, in particular the wedge shaped element, can engage a glass and/or decorative element, plate or cover of the door. It is also conceivable that the door latch, in particular the latching section, in particular the wedge shaped element engages a recess provided in the door.
- In an embodiment, the door latch is attached to a side-wall of the household appliance, and, in the closed state of the door, the latching portion at least partially projects from a front face of the appliance. The latching portion preferably projects through a gap between a lower edge of an upper cover plate and an upper edge of the door. In this configuration, the door latch can easily be mounted and removed from the appliance. Further, it is possible to design the mounting position and mounting space for the door latch in such a way that no extra cover elements are required if the door latch is removed or detached from the appliance. Beyond that, door latch projecting slightly from the appliance is not disruptive to the general handling and to the outer appearance of the appliance, and can easily be operated.
- In a yet further embodiment of the household appliance the U-shaped section, preferably loosely, engages a respective vertical bar of the appliance. The vertical bar may be a protrusion provided at the upper or lateral face side of the appliance, in particular of a casing of the appliance. Such an additional engagement improves latching efficiency and latching strength.
- As to further advantages and advantageous effects, reference is made to the description further above, in particular related to the door latch and embodiments thereof.
- Example embodiments will now be described in connection with the annexed figures, in which:
-
Fig. 1 shows a sectional view of a baking oven with a door latch mounted thereto; -
Fig. 2 shows a single door latch; -
Fig. 3 shows an enlarged section of the baking oven ofFig. 1 ; -
Fig. 4 shows an enlarged side view of the baking oven; and -
Fig. 5 shows an enlarged front view of a section of the baking oven. -
Fig. 1 shows a sectional view of abaking oven 1 with adoor latch 2 mounted thereto. Note that thebaking oven 1, which is just an example of a household appliance, will be described only in so far as is necessary for fully understanding the invention. Further, the figures are not necessarily true to scale and scales between figures may vary. Throughout the text, like reference signs are used for like elements. - The baking
oven 1 comprises acasing 3, a baking chamber or muffle (not shown) and afront door 4 for closing a front opening of the baking chamber. With the situation inFig. 1 , thedoor 4 is in a closed state. Above thedoor 4, anupper cover plate 5 is provided to which one or several control elements are mounted. - In some situations it is desirable to latch the
door 4 in order to prevent unauthorized opening of thedoor 4, i. e. access to the baking chamber. In particular it is desirable to latch thedoor 4 to prevent little children from opening thedoor 4 during operation of thebaking oven 1. - In connection with door latches 2 it is desirable that they have adequate latching efficiency and can be easily and flexibly attached and detached to the
baking oven 1. - From
Fig. 1 it can be seen, and it will be described in more detail below, that thedoor 4 in its closed state is latched by thedoor latch 2. In this way, unauthorized opening of thedoor 4 can at least to some extent be blocked and access to the baking chamber can at least be handicapped. - A detailed view of the
door latch 2 is given inFig. 2 . As can be seen, thedoor latch 2 comprises a fixingportion 6 adapted and designed for fixing thedoor latch 2 to thebaking oven 1. Thedoor latch 2 further comprises a latchingportion 7 for latching thedoor 4. - As becomes obvious from
Fig. 2 , the fixingportion 6 and latchingportion 7 are, with respect to the overall lengthwise direction D or overall longitudinal axis D of thedoor latch 2, twisted by about 90 degrees. In other words, a plane defined by the sheet-like fixing portion 6 and a plane defined by the latchingportion 7 enclose an angle of about 90 degrees. - The twisted configuration of the
door latch 2 on the one hand allows simple and flexible attachment to aside wall 8 of thebaking oven 1 orcasing 3, and on the other hand leads to enhanced operability, latching efficiency and latching strength. - With respect to
Fig. 2 , thedoor latch 2 comprises a hooktype latching element 9 which is plugged on alatching tab 10 of thedoor latch 2. The latchingelement 9 therefore may have a slot having inner dimensions adapted to the outer dimensions of the latchingtab 10 and configured such that the latchingtab 10 can be fixedly plugged into the slot. If required, the latchingelement 9 can be secured to thelatching tab 10 additionally by snap or latch elements engaging each other upon plugging the latchingelement 9 on thelatching tab 10. Snap or latch elements may for example be provided within the slot and on the surface of the latchingtab 10. As an alternative or in addition, it is possible to secure the latchingelement 10 on thelatching tab 10 by adhesive. - The latching
element 9 wedge shape is single sided, i. e. asymmetric with respect to thelatching tab 10. More precisely, when mounted on thelatching tab 10, one surface, inFig. 2 theupper surface 11, of the latchingelement 9 is parallel to thelatching tab 10 and the opposite surface, i.e. thelower surface 12, is slanted downwards. Thelower surface 12 is slanted in such a way, that a step-like latching projection 13 is formed at the lower side of thedoor latch 2 in a transitional region between the latchingelement 9 and latchingtab 10. The step size of the latchingprojection 13 can easily be adjusted by appropriately shaping the latchingelement 9 or by pluggingadequate latching elements 9 on thelatching tab 10. In this way, a high degree of flexibility and efficient and adequate latching engagement with different types of doors can be obtained. - As is also apparent from
Fig. 2 , the latchingtab 10 projects in overall lengthwise direction D from anintermediate section 14. Theintermediate section 14 comprises a U-section with twolegs 15 and abase 16. The U-section is oriented transversally to the overall lengthwise direction D, i. e. thebase 16 is oriented parallel to the overall lengthwise direction D, thelegs 15 are oriented essentially perpendicular to the overall lengthwise direction D and asection opening 17 is directed transversally to the overall lengthwise direction D. - The latching
tab 10 and fixingportion 6 extend from arespective leg 15 in opposite directions in overall lengthwise direction D. In the present case, the latchingtab 10 and theintermediate section 14, i. e. therespective leg 15, enclose an angle of about 90 degrees. Also, the fixingportion 6 and theintermediate section 14, i. e. therespective leg 15, enclose an angle of about 90 degrees. - As becomes obvious from
Fig. 2 , an intersection line between the latchingtab 10 and therespective leg 15 of theintermediate section 14 is oriented essentially horizontal. Due to the fact, that the latchingtab 10 and fixingportion 6 are twisted by about 90 degrees an intersection line between therespective leg 15 of theintermediate section 14 and the fixingportion 6 is oriented essentially vertical. Note that the terms horizontal and vertical relate to the ordinary mounting position of thedoor latch 2, which in particular become obvious fromFig. 1 , and3 to 5 . - The fixing
portion 6 of thedoor latch 2 has an s-shapedend section 18. Further, the fixingportion 6 comprises anend tab 19 having anoblong screw hole 20. Theoblong screw hole 20 permits adjusting the mounting position of thedoor latch 2 parallel to the overall lengthwise direction D, in the present case in horizontal direction. The s-shapedsection 18 permits vertical offsets betweenscrew hole 20 and latchingtab 10. Such vertical offsets, essentially defined by adequate heights of the s-shapedend section 18, may be chosen to best fit respective mounting positions and latching functionality. - Considering
Fig. 2 , it becomes obvious that thedoor latch 2, in more details the base body of thedoor latch 2, can be formed from a single metal strip bended accordingly. The metal strip can be made from stainless steel, standard steel and others. If required, suitable coating, plating and/or finishing can be applied to the base body, such as enamel coating, chrome plating and/or lacquers, respectively. However, it would also be possible that the base body is formed from plastics. As already indicated, the latchingelement 9 is preferably made from plastics. In case that the base body is also made from plastics, the base body and latchingelement 9 can be manufactured as a one-piece part, via injection molding for example. - The
door latch 2 and its function will now be described in further details with respect tofigures 3 to 5 .Fig. 3 shows an enlarged section of thebaking oven 1, in more detail a region to which thedoor latch 2 is mounted to.Fig. 4 shows an enlarged side view of thebaking oven 1 in a region of thedoor latch 2.Fig. 5 shows an enlarged front view of thebaking oven 1 in a region of thedoor latch 2. - As can be seen from the figures, the fixing
portion 6 is attached to theside wall 8 by ascrew 21 passing through thescrew hole 20. The two-dimensional, i. e. areal, extent of the fixingportion 6 is parallel to theside wall 8. As already mentioned, the position of thedoor latch 2 can be adjusted in horizontal direction because thescrew hole 20 is implemented as an oblong hole. - Movement in horizontal direction of the
door latch 2 is guided by ahorizontal abutment edge 22 provided on theside wall 8. Theabutment edge 22 also prevents thedoor latch 2 from rotating aroundscrew 21. However anabutment edge 22 is not mandatory as anti-rotation properties can also be obtained by providing two screws and/or similar engagement elements. - Latching engagement between the
door 4 and thedoor latch 2 is obtained in the present case in an upper section, more precisely an upper edge, of a front pane of thedoor 4. The front pane may be a glass pane and/or any decorative pane mounted or applied to thedoor 4. Note that any other site of thedoor 4 can be used and selected for latching engagement. - The latching
portion 7, in more detail the latchingelement 9 and a part of the latchingtab 10, project from the front face of thebaking oven 1. The latchingtab 10 passes through agap 23 between an upper edge of thedoor 4 and a lower edge of theupper cover plate 5. - The gap is dimensioned such that upon pushing the latching
element 9 and latchingtab 10 fully upwards, i. e. until the section of the latchingtab 10 running within thegap 23 abuts the lower edge of thecover plate 5, the upper edge of thedoor 4 can pass below the latchingprojection 13, and the door can be opened. In situations in which thelatching element 9 and latchingtab 10 are not pushed upwards, the latchingprojection 13 prevents thedoor 4 from passing by. In other words, if thedoor latch 2 is not deflected, the latchingprojection 13 prevents thedoor 4 from being opened in that an upper edge of thedoor 4 abuts the latchingprojection 13. Hence opening of the door can at least be handicapped. - The
door latch 2, in particular the base body, is made from a flexible and elastic material. According to the invention, the latchingelement 9 is held in latching position as long as no pushing force is applied to the latching portion. If a pushing force acting essentially perpendicular to the overall lengthwise direction and perpendicular to theupper surface 11 is applied to the latchingportion 7, the latchingportion 7 is elastically deflected. The latchingportion 7 returns to the latching position again if the pushing force releases. Note that thedoor latch 2 is shown inFig. 1 to 5 in the non-deflected configuration only. If deflected, at least the latchingtab 10 of the door latch shall be bent.
As can be seen fromFig. 3 andFig. 4 , theintermediate section 14, more precisely the U-section, engages avertical bar 24 of thebaking oven 1. Here, additional stability and in particular high latching efficiency of thedoor latch 2 can be obtained.
It shall be noted, that a connection between single components of thedoor latch 2 and connection between thedoor latch 2 and the baking oven can be implemented in other or alternative ways as set out beforehand. For example, connections can be established not only by screws but also by rivets, bonding techniques, in particular adhesion techniques, welding, fusing, two-component methods and the like.
As can be seen, the proposed door latch can easily be attached and detached to baking ovens, in more general terms household appliances. In addition, the proposed door latch can easily be applied to existing appliances. Further, the door latch may be composed of just a few components, which in turn can easily be manufactured and assembled. Beyond this, the door latch allows high latching efficiency and is comparatively robust. -
- 1
- baking oven
- 2
- door latch
- 3
- casing
- 4
- door
- 5
- upper cover plate
- 6
- fixing portion
- 7
- latching portion
- 8
- side wall
- 9
- latching element
- 10
- latching tab
- 11
- upper surface
- 12
- lower surface
- 13
- latching projection
- 14
- intermediate section
- 15
- leg
- 16
- base
- 17
- section opening
- 18
- s-shaped end section
- 19
- end tab
- 20
- screw hole
- 21
- screw
- 22
- abutment edge
- 23
- gap
- 24
- vertical bar
- D
- overall lengthwise direction
Claims (11)
- Household appliance (1) comprising a front door (4) and a door latch (2) adapted to latch the door (4) in a closed state, the door latch comprising a fixing portion (6) for fixing the door latch (2) to the appliance (1) and a latching portion (7) for latching engagement with the door (4), the latching portion (7) comprising a hook-shaped latching element (9), wherein the door latch (2) comprises a base body which at least comprises the fixing portion (6) and the latching portion (7), wherein the base body is made as a one-piece part bent sheet-type elastic body made from a flexible and elastic material such that:i) the latching element (9) is held in latching position as long as no pushing force is applied to the latching portion (7),ii) if a pushing force acting essentially perpendicular to the overall length-wise direction and perpendicular to an upper surface (11) of the latching element (9) is applied to the latching portion (7), the latching portion (7) is elastically deflected, andiii) the latching portion (7) returns to the latching position again if the pushing force releases characterized in that the fixing portion (6) and latching portion (7) are, with respect to the overall lengthwise direction (D) of the door latch (2), twisted by about 90 degrees.
- Household appliance (1) according to claim 1, wherein the hook type latching element (9) is provided at, preferably fixed to, a latching tab (10) of the latching portion (7).
- Household appliance (1) according to claim 1 or 2, wherein the latching tab (10) projects in overall lengthwise direction (D) from a, preferably strip shaped, intermediate section (14) which is oriented transversally to the overall lengthwise direction (D), wherein the latching tab (10) and intermediate section (14) preferably enclose an angle of about 90 degrees.
- Household appliance (1) according to any of claims 1 to 3, wherein the intermediate section (14) comprises a U-section (15, 16), wherein a section opening (17) of the U-section (15, 16) is oriented transversally to the overall lengthwise direction (D), and the latching portion (7) extends from one of the legs (15) of the U-shaped section (15, 16) and the fixing portion (6) extends from the other one of the legs (15) of the U-shaped section (15, 16) in opposite direction to the latching portion (7).
- Household appliance (1) according to any of claims 1 to 4, wherein the base body is made from metal and/or plastics.
- Household appliance (1) according to any of claims 1 to 5, wherein the fixing portion (6) has a planar s-shaped end section (18) preferably having an oblong screw hole (20) for fixing the door latch (2) to the appliance (1).
- Household appliance (1) according to any of claims 1 to 6, wherein the latching element (9) comprises a wedge shaped element (9) attached to the latching tab (10), in combination making up a latching tooth (13) for latching engagement with the door (4).
- Household appliance (1) according to one of claims 1 to 7, the household appliance (1) being a baking oven (1).
- Household appliance (1) according to any of claims 1 to 8, wherein the door latch is adapted to latch the door at an upper or lateral edge of the door (4).
- Household appliance (1) according to any of claims 1 to 9, wherein the door latch (2) is attached to a side wall (8) of the household appliance (1), and wherein in the closed state of the door (4), the latching portion (7) at least partially projects from a front face of the appliance (1), preferably through a gap (23) between a lower edge of an upper cover plate (5) and an upper edge of the door (4).
- Household appliance (1) according any of claims 1 to 10, wherein the door latch (2) comprises an intermediate section (14) with a U-shaped section (15, 16) according to claim 4, wherein the U-shaped section engages a respective vertical bar (24) of the appliance (1).
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP11004646.3A EP2532973B1 (en) | 2011-06-08 | 2011-06-08 | Household Appliance |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP11004646.3A EP2532973B1 (en) | 2011-06-08 | 2011-06-08 | Household Appliance |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2532973A1 EP2532973A1 (en) | 2012-12-12 |
EP2532973B1 true EP2532973B1 (en) | 2017-11-29 |
Family
ID=44509733
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP11004646.3A Active EP2532973B1 (en) | 2011-06-08 | 2011-06-08 | Household Appliance |
Country Status (1)
Country | Link |
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EP (1) | EP2532973B1 (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SI25410A (en) | 2017-04-14 | 2018-10-30 | Gorenje Gospodinjski Aparati, D.D. | A door blocking device with the household appliance |
US10401081B2 (en) * | 2017-10-13 | 2019-09-03 | Whirlpool Corporation | Adapter crossbar for appliance user interface |
EP3546835A1 (en) * | 2018-03-28 | 2019-10-02 | Electrolux Appliances Aktiebolag | Locking mechanism for a door of a domestic appliance |
PL235690B1 (en) * | 2018-03-29 | 2020-10-05 | Amica Spolka Akcyjna | Door bolt lock system, preferably of a cooking oven |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2142690A (en) * | 1937-02-13 | 1939-01-03 | Chester O Goserud | Storm sash fastener |
US2794663A (en) * | 1955-07-05 | 1957-06-04 | Arrowsmith Tool & Die Corp | Combination latch and dead bolt |
DE8137042U1 (en) | 1981-12-18 | 1982-03-18 | Bosch-Siemens Hausgeräte GmbH, 7000 Stuttgart | COOKER |
DE9406610U1 (en) * | 1994-04-20 | 1994-06-23 | Bosch Siemens Hausgeraete | oven |
DE29902943U1 (en) * | 1999-02-19 | 1999-07-22 | Emka Beschlagteile | Rod lock with locking device |
WO2003018943A1 (en) * | 2001-08-24 | 2003-03-06 | Arcelik, A.S. | Locking mechanism |
DE102006007328A1 (en) * | 2006-02-16 | 2007-08-30 | BSH Bosch und Siemens Hausgeräte GmbH | Locking device for door of household-dishwasher, has two engagement elements, whose relative movement is brought about by moving control lever, where partial opening of door is excluded in locking position |
JP2008196733A (en) * | 2007-02-09 | 2008-08-28 | Sharp Corp | Cooker |
DE102009053714A1 (en) * | 2009-10-19 | 2011-04-28 | Liebherr-Hausgeräte Lienz Gmbh | household appliance |
-
2011
- 2011-06-08 EP EP11004646.3A patent/EP2532973B1/en active Active
Non-Patent Citations (1)
Title |
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None * |
Also Published As
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EP2532973A1 (en) | 2012-12-12 |
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