EP2314926B1 - Domestic appliance, in particular cooking device, with a cable clip - Google Patents

Description

The invention relates to a domestic appliance, in particular cooking appliance, preferably gas-fired cooking appliance, comprising at least one bearing member made of sheet metal and at least one electrical line and at least one line holder for fixing the position of the electrical line to the supporting component.

Domestic appliances of the type mentioned have a housing with a series of load-bearing components which form, for example, a housing of the domestic appliance and / or serve for fastening components of the domestic appliance.

In generic household appliances are, for example, stoves. Stoves can be equipped with a gas-fired hob and an electrically heated oven. For igniting the gas flames on the burners of the gas-heated cooktop, ignition electrodes are arranged in the region of the gas burners and can be acted upon by electrical lines with a high ignition voltage. Modern ovens in stoves often have an electronic control, which - to avoid malfunction - is to protect against strong electrical and / or magnetic fields. In order to avoid disturbances of the electronics, the electrical lines, in particular the abovementioned ignition lines, are defined routed inside the household appliance, so that a minimum distance to the electronic components is maintained. Next is to make sure that the arrangement of the electrical lines, that they do not come in contact with very hot components, for example, with the lower parts of the gas burner, as this can damage the insulation of the cables.

In order to define the position of the electrical lines inside the cooking appliance, the use of line holders is known. In the prior art, these are resilient clips made of plastic, which are clipped into prepared openings of the supporting component of the household appliance. Two opposing hooks of the resilient clip then define the position of the inserted between the hook electrical line. A disadvantage of this known solution is that the resilient clips represent separate components that must be pre-assembled to the supporting component.

In addition, there is a risk that the resilient clamps are damaged or lost during transport, which then, for example, on the assembly line of the domestic appliance reworking required.

Moreover, from the document EP 0 321 286 A1 an apparatus for producing a wire harness of a plurality of wires, the apparatus having a structural member in the form of a wire support frame having grooves extending along a surface thereof. The frames can be made of plastic or by Therrrioformen, z. B. by vacuum forming of plastic sheet material, are produced. It is also envisaged that the frame can be stamped and formed from sheet metal or aluminum.

Besides, from the document DE 10 2007 052073 B3 a household appliance with a cable harness recorded in the cable duct and a grounding cable, which is electrically connected to an electrically conductive component of the domestic appliance. In this case, a hinge plate is provided with a formed by folding and punching metallic contact tab, which comes in contact with the cable duct in touching contact with the contact tongue. About the electrical contact between the contact tongue and contact tab, the metallic hinge plate and an attached thereto and electrically connected to the hinge plate treatment tank connected to the ground terminal of the household power supply.

Besides, from the document JP 10009578 A a U-shaped sheet metal component for mounting an ignition known. For positioning, parts of the sheet metal component are bent around the lead wires to engage around them.

Besides, from the document GB 2197457 A a pluggable oven structure known. In this case, an opening 65A forms the passage for an electrical wiring harness through an extension 65th

Further relevant prior art is in the documents EP 1 529 873 A1 and US 5,184,792 A. to find.

The present invention is therefore an object of the invention to provide a domestic appliance available, in which the electrical lines are set in a particularly simple manner and while avoiding possible damage to the electrical line by ridges created during manufacture are safe on the metal sheet.

This object is achieved by the characterizing features of claim 1. With particular advantage, the invention can be used when the electrical line is provided for applying high voltage. Usually, electrical voltages of> 1000 volts are referred to as high voltage. Due to the high voltage is in such lines a particularly high risk that other electrical or electronic components of the domestic appliance are disturbed by electrical or electromagnetic fields. For this reason, provided for applying high voltage electrical lines are separated from other lines are laid in the household appliance and a particularly large distance to electronic components is observed.

With particular advantage, the invention can be used when the appliance has a hob and the supporting member is a part of the hob. In the case of cooktops, it is also necessary to ensure that the electrical cables are laid separately from components that are particularly hot during operation, such as gas burners or electric radiators.

For example, the domestic appliance can have a gas burner and the gas burner can be fastened to the supporting component. For stoves, the load-bearing component may be formed, for example, by a so-called burner bridge. A burner bridge is a bow-shaped component which extends from the left to the right side wall of the stovetop and serves to accommodate the lower parts of the gas burners. The electrical leads leading to the gas burner are then likewise fastened to the burner bridge by means of the conductor holders according to the invention.

In this case, it is possible that the domestic appliance has a gas burner and the electrical line is an ignition line for the gas burner. At the burner end of the ignition line is a so-called ignition electrode, at the ignition of the gas burner, an electric spark is generated. For this purpose, the ignition line can be acted upon by a pulsed high voltage. The conductor holder is worked out by a material-separating processing step from the metal sheet of the supporting component. As a material-separating processing steps are, for example, punching or laser cutting into consideration.

Appropriately, the material-separating processing step for the preparation of the tab from the metal sheet by a burr-forming method, for example by punching, and the metal sheet is oriented during the material-separating processing step such that the burr on the tab on the side facing away from the electrical line. The electric cable can be fixed to the tab, in which she is pushed under the tab. Consequently, the tab is made such that the ridge is at the top of the tab. In this way, damage to the electrical line, in particular its isolation, is excluded by the burr. A deburring of the tab is not required.

It is also expedient that the material-separating processing step for the preparation of the tab from the metal sheet by a burr-forming process, for example by punching done and the metal sheet is deformed during the material-separating processing step such that the burr on the flap facing edge of the supporting member oriented in such a way is that the mounted electrical line does not rest on the ridge. The burr formed as a result of the punching on the load-bearing component is located on the side of the load-bearing component facing the electrical line. Damage to the electrical line can nevertheless be reliably prevented by adjusting the punching tool in such a way that, during the punching process, the metal sheet is first bent in the direction of the side facing away from the later-emerging ridge, and only then is the tab punched out. In this way, the orientation of the ridge can be influenced such that the sharp edge of the ridge is parallel to the metal sheet or slightly downwards. The electrical line is therefore not directly on the ridge, so that damage to the electrical line is excluded. Deburring of the load-bearing component is not required.

A particularly convenient shape is when the tab has a rear portion at which the tab is in the plane of the metal sheet of the supporting member and merges into the supporting member, a central portion in which the tab from the plane of the metal sheet of the supporting member is spaced, and a front portion, in which the tab has a smaller distance from the plane of the metal sheet of the component than in the central portion. With this design of the tab is ensured that the electrical cable can not slip out of the line holder by itself. At the same time, the electrical line in the line holder is guided loosely enough that a movement of the electrical line in the longitudinal direction is made possible.

This is achieved in that the electrical line is arranged in the region of the middle section of the tab, between the tab and the plane of the metal sheet of the supporting component.

Further advantages and details of the invention will be explained in more detail with reference to the embodiment shown in the schematic figures.

Figur 1

ein als Standherd ausgeführtes Hausgerät in schematischer Darstellung,

Figur 2

den Standherd von oben mit abgenommener Kochfeldplatte,

Figur 3

einen Ausschnitt mit einem Brennerunterteil eines Gasbrenners und einem erfindungsgemäßen Leitungshalter,

Figur 4

einen Leitungshalter im Detail,

Figur 5

einen Querschnitt durch den Leitungshalter,

Figur 6

einen Querschnitt durch einen alternativ ausgeführten Leitungshalter.

Showing:

FIG. 1

a household appliance designed as a stove in a schematic representation,

FIG. 2

the stove from above with removed hob plate,

FIG. 3

a section with a burner lower part of a gas burner and a conductor holder according to the invention,

FIG. 4

a conductor holder in detail,

FIG. 5

a cross section through the conductor holder,

FIG. 6

a cross section through an alternative designed conductor holder.

FIG. 1 shows a running as a stove 1 domestic appliance in a schematic representation. The stove 1 has a hob 2 and an oven 3. The operation of the hob 2 and the oven 3 by means of controls 4. Furthermore, a display element 5 is provided with an operator, for example, the current operating state of the stander 1 can be displayed. The hob 2 of the stander 1 is designed as a gas hob and has four gas burner 6, which are arranged on a hob plate 7. Not shown in the present figure are pot carrier, which are supported on the hob plate 7 and a support surface for food containers such as pots or pans. On the pot carriers, a food container can be positioned so that it is located directly above a gas burner 6 and can be heated with this.

FIG. 2 To recognize here are the normally under the cooktop plate 7 located burner bases 9 of the gas burner 6. In each case two burner bases 9 are mounted on a designated as burner bridge supporting member 8, which is located between two side walls 10 of the stander 1 extends and on these side walls 10 is attached. According to the invention, conductor holders 13 for electrical lines 12 are formed directly from the supporting components 8. The line holder 13 define the position of the electrical lines 12, which serve to supply to the burner lower parts 9 arranged ignition electrodes 14 with high voltage electrical. An electronics unit 11, which serves in particular for controlling the various functions of the oven 3, is arranged clearly spaced from the electrical lines 12. In this way, a possible disruption or damage of the electronic unit 11 is reliably prevented by the electrical and / or magnetic beams emanating from the electrical lines 12.

In FIG. 3 is a part of the FIG. 2 shown with a burner lower part 9 of a gas burner 6 and a conductor holder 13 according to the invention. The arrangement of the line holder 13 in the supporting component 8 can be seen here in particular. The electrical line 12 guided with the line holder 13 is connected to the ignition electrode 14. Further to recognize is a thermocouple 15, with which a flame can be detected at the gas burner 6.

In FIG. 4 a non-inventive conductor holder 13 is shown in detail. According to the invention, the conductor holder is integrally formed by a material-separating processing step and by a material-deforming processing step from the metal sheet of the supporting component 8. The material-separating processing step and the deforming processing step are combined using suitable tools into a single processing step.

The line holder 13 consists of a separate out of the metal sheet tab 19, which remains connected to one side with the metal sheet of the supporting member 8. The tab 19 is partially bent out of the plane of the metal sheet upwards. In a rear section 16, the tab 19 lies in the plane of the metal sheet and merges into the supporting component 8. A middle portion 17 of the tab is bent out of the plane of the metal sheet of the supporting member 8. The resulting between the central portion 17 and the plane of the metal sheet of the supporting member 8 distance serves to receive the electrical line 12. A front portion 18 of the tab is back down, to Level of the metal sheet of the supporting member 8 bent out. This secures the electrical line against slipping out of the line holder 13.

The assembly of the electrical line 12 in the line holder 13 is effected in a simple manner in that the electrical line 12 is pushed according to the drawing from left to right under the tab 19. For this purpose, it is necessary to slightly deform the electrical line 12. Removal of the electrical line 12 from the line holder 13 requires a renewed manual deformation of the electrical line 12. An automatic slipping out of the electrical line 12 from the line holder 13 is thus reliably prevented.

FIG. 5 shows a cross section through a non-inventive line holder 13 in the region of the central portion 17. Evident is the metal sheet of the supporting member 8 and the formed therefrom tab 19, which is increased in the central portion 17 relative to the plane of the metal sheet.

In the production of the line holder 13, the material-separating processing step is carried out such that a ridge 20 which thereby arises on the tab 19 is located on the upper side of the lug 19 facing away from the electrical line 12. Damage to the electrical line 12 through the ridge 20 located on the tab 19 is thereby excluded both during assembly, as well as during transport or during operation of the stander 1. When carrying out the separating processing step for producing the tab 19, it is further taken into consideration that a burr 21 emerging at the top side of the supporting component 8 is not directed toward the electric line 12. This is accomplished by deforming the metal sheet of the structural member 8 downwardly prior to performing the material separating processing step.

FIG. 6 shows a cross section through a inventively designed conductor holder. Here, the metal sheet is deformed such that the tab 19a is concavely curved such that the edges of the tab 19a are bent away from the electric wire 12. Similarly, the edges of the supporting member 8a facing the tab 19a are in the opposite direction, ie also bent away from the electrical lead. On In this way, damage to the electrical line 12 is also reliably prevented by burrs which may possibly occur at the edges during production.

LIST OF REFERENCE NUMBERS

1

Standherd

2

hob

3

oven

4

controls

5

display element

6

gas burner

7

Hotplate

8th

carrying component

9

Burner base

10

Side wall

11

electronics unit

12

electric lines

13

Conductor holder

14

ignition electrode

15

thermocouple

16

rear section

17

middle section

18

front section

19

flap

20

ridge

21

ridge

Claims (10)

1. Domestic appliance, in particular cooking appliance, preferably gas-heated cooking appliance, having at least one supporting component (8) made from sheet metal and at least one electrical cable (12) as well as at least one cable clip (13) for fixing the position of the electrical cable (12) on the supporting component (8), wherein the cable clip (13) is moulded in one piece and in the form of a tab (19) from the supporting component (8), wherein by means of a deforming processing step the tab (19) is formed, at least in regions, from the plane of the sheet metal, characterised in that a material-separating processing step for forming the tab (19a) is performed such that during the material-separating processing step the sheet metal is deformed such that at least one lateral edge of the tab (19) and at least one edge of the supporting component (8a) facing this edge of the tab (19a) are bent away from the electrical cable (12) in opposite directions with respect to one another.
2. Domestic appliance according to claim 1, characterised in that the electrical cable (12) is provided to apply high voltage.
3. Domestic appliance according to claim 1 or 2, characterised in that the domestic appliance has a hob (2) and the supporting component (8) is a part of the hob (2).
4. Domestic appliance according to one of claims 1 to 3, characterised in that the domestic appliance has a gas burner (6) and the gas burner (6) is fastened on the supporting component (8).
5. Domestic appliance according to one of claims 1 to 4, characterised in that the domestic appliance has a gas burner (6) and the electrical cable (12) is an ignition cable for the gas burner (6).
6. Domestic appliance according to one of claims 1 to 5, characterised in that the cable clip (13) is formed from the sheet metal of the supporting component (8) by means of a material-separating processing step.
7. Domestic appliance according to one of claims 1 to 6, characterised in that the material-separating processing step for forming the tab (19) from the sheet metal is carried out by means of a flash-forming method, for instance by means of stamping, and during the material-separating processing step the sheet metal is oriented such that a flash (20) appearing on the tab (19) is disposed on the side facing away from the electrical cable (12).
8. Domestic appliance according to one of claims 1 to 7, characterised in that the material-separating processing step for forming the tab (19) from the sheet metal is carried out by means of a flash-forming method, for instance by means of stamping, and during the material-separating processing step the sheet metal is deformed such that a flash (21) appearing on the edge of the supporting component (8) facing the tab (19) is oriented such that the electrical cable (12) does not rest on the flash (21) when assembled.
9. Domestic appliance according to one of claims 1 to 8, characterised in that the tab (19) has a rear segment (16), on which the tab (19) lies in the plane of the sheet metal of the supporting component (8) and passes into the supporting component (8), a middle segment (17), in which the tab (19) is arranged at a distance from the plane of the sheet metal of the supporting component (8), and a front segment (18), in which the tab (19) has a smaller distance from the plane of the sheet metal of the supporting component (8) than in the middle segment (17).
10. Domestic appliance according to claim 9, characterised in that the electrical cable (12) is arranged in the region of the middle segment (17) of the tab (19), between the tab (19) and the plane of the sheet metal of the supporting component (8).

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