EP2720107B1 - Operating device a gas-heated cooking device - Google Patents

Description

The present invention relates to an operating device for a gas-fired cooking appliance. For example, this describes DE 10 2009 042 562 A1 an operating device for an electrical appliance, such as a hob or an oven, with a rotary knob, which actuates a switch via a shaft. The rotary knob has on its top a display for displaying information, such as symbols on.

DE 10 2006 022326 A1 describes an operating device for a gas-fired cooking appliance, with a display for displaying information, a rotary knob which receives the display and is rotatably provided with respect to this, and a transmission element which is adapted to transmit a rotary movement of the rotary knob to a switch element of the cooking appliance ,

In the known from the prior art operating device has proved to be disadvantageous that the display with the rotation of the rotary knob, when it is operated rotates. A reading of the display is thus difficult.

Against this background, an object of the present invention is to provide an improved operating device.

Accordingly, an operating device for a gas-fired cooking appliance is provided with a display for displaying information, a rotary knob and a transmission element. The rotary knob receives the display and is rotatable relative to this. The transmission element is configured to transmit a rotary movement of the rotary knob to a valve stem of a gas valve of the cooking appliance.

As a result, the display can be fixed in relation to a reading operator, while the rotary knob is rotated by the operator, for example, to set a cooking temperature around the display. The stationary display is easy for an operator to read, since the information displayed on this always has the same orientation.

The display can be designed, for example, as an LCD or LED display. Furthermore, the display may have one or more seven-segment displays for displaying the information.

In the operating device of the rotary knob drives the transmission element by means of a transmission. The transmission can be designed as a transmission or reduction gear. For example, can be achieved in that only a small amount of force required to rotate the valve stem. Overall, the transmission element can be easily driven by the provision of the transmission.

In the operating device, the transmission has at least two, preferably four gears. For example, if four or more gears provided on parallel axes of rotation, so they can be made small and yet transmit the rotational movement over a large distance. Thereby, the rotational movement of the rotary knob can be easily transmitted to a rotation axis of the rotary knob. The axes of rotation of the at least two gears preferably extend parallel to a rotational axis of the rotary knob.

In the operating device, the at least two gears are designed as spur gears. Instead of the spur gears and bevel gears could be used. The spur gears can be straight or helical toothed.

In the operating device, the rotary knob on an internally toothed, first spur gear, which is arranged with a disposed within the rotary knob, externally toothed, second spur gear engaged. Preferably, the rotary knob, in particular an annular portion thereof, formed integrally with the first spur gear. The first spur gear may be formed on an inner side of the annular portion of the rotary knob. The rotary knob with the first spur gear can be manufactured as one piece in a plastic injection molding process, for example. The second spur gear is preferably arranged within a passage opening of the annular portion of the rotary knob.

According to a further embodiment, the second spur gear drives the transmission element by means of a third and / or fourth spur gear. As a result, the distance from an outer region of the rotary knob or its annular portion to the axis of rotation of the rotary knob, with which the transmission element is arranged coaxially, can be overcome.

According to a further embodiment, the third and fourth spur gear are each formed externally toothed. Thereafter, the first spur gear is engaged with the second spur gear, the second spur gear is engaged with the third spur gear, and the third spur gear is engaged with the fourth spur gear, and the fourth spur gear drives the transmission element.

According to a further embodiment, the fourth spur gear is arranged coaxially with the transmission element and rotatably connected thereto. The transmission element may for example be connectable at its one end to the shaft of the valve stem and to carry at its other end the fourth spur gear. The transmission element may be formed as a shaft. The shaft may have a hollow portion in which the valve stem engages positively in the rotational direction.

According to a further embodiment, at least the second spur gear is rotatably mounted on a stationary relative to the display support member of the operating device. The support member may be formed, for example in the form of an arm.

According to a further embodiment, a rotary knob of the front side at least partially occlusive lid of the operating device on the display. The lid is therefore also provided stationary. The lid may be rotatably connected, for example, with a Blenden- or cooktop element of the gas-fired cooking appliance. Accordingly, then the display against the aperture or hob element is provided rotatably.

According to a further embodiment, the support element is positively, positively and / or materially connected to the lid having the display. This results in a simple structure.

According to a further embodiment, the support element is designed in the form of an arm, which extends radially through a recess in a rotatably connected to the cover pipe or double web. The fact that the arm extends radially through the recess, it forms in the circumferential direction - with respect to the axis of rotation of the rotary knob - with the pipe or double bar a positive connection. The fact that the arm can be easily inserted into the recess, resulting in a simple installation.

According to a further embodiment, the arm carries at its radially outer end the second spur gear. As a result, the second spur gear is located opposite the first spur gear and can thus be in engagement therewith.

According to a further embodiment, the display is configured to display a rotational position of the rotary knob, a temperature level of a gas burner associated with the gas valve, a temperature, a time or a timer. The temperature may be, for example, the temperature in a cooking chamber of the cooking appliance. By "temperature stage" is meant typically a number which varies in a range of, for example, 1-10 depending on the heat emitted by the gas burner.

Furthermore, a gas-fired cooking appliance is provided with an orifice plate or hob element, a gas valve and the control device according to the invention. The gas valve has a valve stem. The display of the operating device is provided stationary with respect to the diaphragm or plate member and the transmission element is rotatably connected to the valve stem.

The gas-fired cooking appliance can be, for example, a gas hob, a gas hob, a gas stove or an oven.

The diaphragm element may be formed for example in the form of a deep-drawn part.

The hob element may include one or more gas burners.

Of course, a plurality of gas valves may be provided, which are each associated with a gas burner, for example.

Furthermore, it is also possible to provide a plurality of operating devices which, for example, are each assigned to a gas valve.

Further possible implementations of the invention also include not explicitly mentioned combinations of before or below with respect to the Embodiments described features or embodiments of the operating device or the gas-fired cooking appliance. The skilled person will also add or modify individual aspects as improvements or additions to the respective basic form of the invention.

Further advantageous embodiments and aspects of the invention are the subject of the dependent claims and the embodiments of the invention described below. Furthermore, the invention will be explained in more detail by means of preferred embodiments with reference to the attached figures.

• Fig. 1: in einer perspektivischen Ansicht teilweise eine Bedieneinrichtung gemäß einer Ausführungsform;
• Fig. 2: in einer perspektivischen Ansicht einen Längsschnitt durch die Bedieneinrichtung in einem in einem gasbeheizten Gargerät montierten Zustand;
• Fig. 3: die Schnittansicht aus Figur 2 in einer Draufsicht;
• Fig. 4: in einer perspektivischen Ansicht im Querschnitt die Bedieneinrichtung aus Figur 2; und
• Fig. 5: in einer Draufsicht den Schnitt aus Fig. 4.

It shows:

• Fig. 1 in a perspective view partially an operating device according to an embodiment;
• Fig. 2 : In a perspective view a longitudinal section through the operating device in a mounted in a gas-fired cooking appliance state;
• Fig. 3 : the section view FIG. 2 in a plan view;
• Fig. 4 : In a perspective view in cross section of the operating device FIG. 2 ; and
• Fig. 5 : in a plan view the cut out Fig. 4 ,

In the figures, the same or functionally identical elements have been given the same reference numerals, unless stated otherwise.

Fig. 1 shows in a perspective view an operating device 1 according to one embodiment.

The operating device 1 comprises a display 2 for displaying information and a rotary knob 3.

According to the exemplary embodiment, the display 2 is designed in the form of a seven-segment display and integrated in a cover 4. The rotary knob 3 is provided so as to be rotatable relative to the cover 4 and thus also relative to the display 2 about an axis of rotation 5.

FIG. 2 shows in a perspective view seen a longitudinal section (ie along a plane in which the axis of rotation 5 is) by the operating device 1. The operating device 1 is mounted in a cooking device designated 6, thus forming part of the same.

The cooking appliance 6 comprises in addition to the operating device 1, a diaphragm element 7, which is formed for example as a deep-drawn part. The diaphragm element 7 defines a device interior 11. In the device interior 11, a gas valve 12 is arranged. The gas valve 12 has a valve stem 13. The valve stem 13 projects upwards to the operating device 1 and is arranged coaxially with the axis of rotation 5. By turning the valve stem 13 about the axis of rotation 5, a non-illustrated valve body of the gas valve 12 is moved between an open and a closed position, thereby adjusting a gas flow towards a gas burner, not shown, of the cooking device 6.

The operating device 1 has a transmission element 14 in the form of a shaft. The transmission element 14 is configured to transmit a rotary movement of the rotary knob 3 about the rotation axis 5 to the valve stem 13 of the gas valve 12. For this purpose, the transmission element 14 has a hollow end 15, which can be brought into positive engagement with the valve stem 13 in the direction of rotation about the axis of rotation 5. This is also in FIG. 3 to recognize which the cut out FIG. 2 in a plan view. At its other end 16, the transmission element 14 is driven by the rotary knob 3 via a gear 17.

The transmission 17 is in the FIGS. 4 and 5 to recognize, where FIG. 4 a cross-section through the operating device 1 in a perspective view and FIG. 5 the cut out FIG. 4 in a plan view.

The transmission 17 is composed, for example, of four toothed wheels 21, 22, 23, 24. The first gear 21 is formed in the form of an internally toothed spur gear. According to the embodiment, the first gear 21 is at an annular portion 25th of the rotary knob 3 and formed integrally therewith. The annular portion 25 together with the first gear 21 is arranged coaxially with the axis of rotation 5.

As in the Figures 2 and 3 to recognize, an inwardly and downwardly directed L-shaped portion 26 is integrally formed on the annular portion 25. In the L-shaped portion 26 engages an outwardly and upwardly directed L-shaped portion 27 of the lid 4 a. The L-shaped portion 27 is formed on a disc-shaped portion 31 of the lid 4, which on the upper side with the L-shaped portion 26 can be aligned and the display 2 carries. Due to the L-shaped sections 26, 27, the lid 4 and the rotary knob 3 are engaged with each other along the axis of rotation 5 in a positive engagement. At the same time, however, a rotation of the rotary knob 3 around the lid 4 or the axis of rotation 5 is released.

Now returning to the FIGS. 4 and 5 the first gear 21 is engaged with a second gear 22. The second gear 22 is just like the third and fourth gear 23, 24 to an externally toothed spur gear. The second gear 22 drives the third gear 23 and the third gear 23 drives the fourth gear 24 at. The fourth gear 24 may be formed integrally with the end 16 of the transmission element 14. The gears 21, 22, 23, 24 each have parallel axes of rotation (ie parallel to the axis of rotation 5). On the cover 4, a double web 32 is formed on the underside, as in FIG. 1 in synopsis with FIG. 2 to recognize. The double web 32 is composed of two individual webs 33, 34, which are each formed annular segment-shaped and are spaced from each other by a recess 35. The double bridge 32 may, as in the Figures 2 and 3 to extend through an opening 36 in the shutter member 7 toward the gas valve 12. The rotary knob 3, however, is above the diaphragm element 7 and thus arranged outside of the device interior 11. In the recess 35 is as in the FIGS. 4 and 5 to recognize a support member 37 arranged in the form of an arm. The support member 37 is thus in positive engagement with the double web 32 in the direction of rotation about the axis of rotation 5. The transmission element 14 or its toothed wheel 24 penetrates the support element 37 centrally in the center. Radially outward (in the present case always refers to the axis of rotation 5), the support element 37 has two shafts 41, 42 which carry the third and second gear 23, 22, respectively , Thus, the second gear 42 is disposed at the radially outer end 43 of the support member 37 and is engaged there with the first gear 21, while the third Gear 23 is rotatably mounted between the second gear 22 and the fourth gear 24 on the support member 37, see also FIG. 5 ,

Now presses an operator person the rotary knob 3 about the axis of rotation 5, the transmission 17 transmits this rotational movement to the transmission element 14, which in turn drives the valve stem 13. In this case, the display 2 remains stationary with respect to the diaphragm element 7 or the operator, so that they can read the display 2 easily. For example, the display 2, a temperature level of the gas valve 12 associated gas burner (not shown), in particular a level between 1 and 10, which is a function of the gas burner supplied amount of gas, indicate.

Although the invention has been described herein with reference to preferred embodiments, it is by no means limited thereto, but variously modifiable.

Used reference signs:

1

operating device

2

display

3

rotary knob

4

cover

5

axis of rotation

6

Cooking appliance

7

diaphragm element

11

Appliance interior

12

gas valve

13

valve stem

14

transmission element

15

The End

16

The End

17

transmission

21

gear

22

gear

23

gear

24

gear

25

annular section

26

L-shaped section

27

L-shaped section

31

disc-shaped section

32

double bridge

33

web

34

web

35

recess

36

opening

37

supporting member

41

wave

42

wave

43

The End

Claims (12)

1. Operating facility (1) for a gas-heated cooking appliance (6), with a display (2) for displaying information, a rotating knob (3), which incorporates the display (2) and is provided to be rotatable in relation thereto, and a transmission element (14), which is designed to transmit a rotating movement of the rotating knob (3) to a valve stem (13) of a gas valve (12) of the cooking appliance (6), wherein the rotating knob (3) drives the transmission element (14) by means of a gear unit (17), wherein the gear unit (17) has at least two toothed wheels (21, 22, 23, 24) arranged within the rotating knob, wherein the at least two toothed wheels (21, 22, 23, 24) are configured as spur wheels, wherein the rotating knob (3) has an internally toothed, first spur wheel (21), which engages with one externally toothed, second spur wheel (22) of the at least two toothed wheels arranged within the rotating knob (3).
2. Operating facility according to claim 1, characterised in that the gear unit (17) has four toothed wheels (21, 22, 23, 24).
3. Operating facility according to claim 1 or 2, characterised in that the second spur wheel (22) drives the transmission element (14) by means of a third and/or fourth spur wheel (23, 24).
4. Operating facility according to claim 3, characterised in that the third and fourth spur wheels (23, 24) are each configured with external teeth.
5. Operating facility according to claim 3 or 4, characterised in that the fourth spur wheel (24) is arranged coaxially in relation to the transmission element (14) and connected in a non-rotational manner thereto.
6. Operating facility according to one of claims 1 - 5, characterised in that at least the second spur wheel (22) is held in a rotatable manner on a support element (37) of the operating facility (1) that is in a fixed position in relation to the display (2).
7. Operating facility according to one of claims 1 - 6, characterised in that a cover (4) of the operating facility (1), which at least partially closes off the front face of the rotating knob (3), features the display (2).
8. Operating facility according to claim 7, characterised in that the support element (37) is connected with a form, force and/or material fit to the cover (4) featuring the display (2).
9. Operating facility according to claim 8, characterised in that the support element (37) is configured in the form of an arm which extends radially through a cutout (35) in a pipe or double web (32) connected in a non-rotational manner to the cover (4).
10. Operating facility according to claim 9, characterised in that the arm (37) supports the second spur wheel (22) at its radially outer end (43).
11. Operating facility according to one of claims 1 to 10, characterised in that the display (2) is designed to display a rotation position of the rotating knob, a temperature stage of a gas burner assigned to the gas valve (12), a temperature, a time or a timer.
12. Gas-heated cooking appliance (6) with a panel or hob element (7), a gas valve (12), which has a valve stem (13), and an operating facility (1) according to one of claims 1 to 11, wherein the display (2) is provided in such a manner that it is in a fixed position in relation to the panel or plate element (7) and the transmission element (14) is connected in a non-rotational manner to the valve stem (13).

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