EP3249298B1

EP3249298B1 - A cooking device having a gas tap

Info

Publication number: EP3249298B1
Application number: EP17172673.0A
Authority: EP
Inventors: Ercan Bagis; Ergin Gönen; Hakan Sengün
Original assignee: BSH Hausgeraete GmbH
Current assignee: BSH Hausgeraete GmbH
Priority date: 2016-05-26
Filing date: 2017-05-24
Publication date: 2019-11-20
Anticipated expiration: 2037-05-24
Also published as: TR201607058A2; EP3249298A1; ES2761306T3

Description

TECHNICAL FIELD

The present invention relates to cooking devices having at least one gas tap thereon which guides gas according to the preamble of claim 1.

KNOWN STATE OF THE ART

In the known art, different types of gas taps are used in domestic cooking devices like stove, oven. Gas taps in general comprise a body, a guidance element bedded in the body and providing gas flow with suitable flow rate, a cover covering the body in a manner preventing reaching the guidance element, and a shaft passing through the cover. On the body, there is a gas inlet section and at least one gas outlet section. The function of said guidance element is to guide the gas, entering into the tap through the gas inlet section, to the gas outlet section with suitable flow rate. Thus, gas, having flow rate which is suitable for the burning position in the burners as desired by the user, is guided to the burners. The user adjusts the burning position by means of a control element fixed to the shaft of the tap. This control element is in general a rotary control knob.
In rotary control knobs, first of all, the user pushes the knob and thus the tap shaft forwardly in the axial direction and afterwards, the user turns the knob in the direction of the desired burning position. Here, the user uses more power for the forward pushing movement. In the pop-out rotary control knobs, since said forward pushing movement cannot be transferred to the gas tap, difficulty is faced during the use of such knobs in gas systems.
In the patent application WO0206731 , a device for maneuvering a cock for shutting off and regulating gas supplied to a burning apparatus, as well as for actuating an auxiliary member which controls correct operation of the burning apparatus during lighting and/or operating steps. Provided between the knob and the cock are means for transmitting movement that comprise cam surfaces having conjugated and opposed profiles to enable the cock control stem to be selectively driven in rotation or axially translated.
A cooking device having a gas tap is also described by DE2943996A .

BRIEF DESCRIPTION OF THE INVENTION

The object of the present invention is to facilitate the required action for gas passage in gas taps only by means of turning the control element by the user by exerting less force.
Another object of the present invention is to provide usage of gas taps with pop-out rotary control knobs besides rotary control knobs.
In order to realize the abovementioned object, the present invention is a cooking device having a gas tap comprising a body, a guidance element bedded at an inner section of the body, a second flexible element placed inside said guidance element, a shaft having a shaft extension, said shaft extension engaging to an opening provided on the gas guidance element, in order to transfer the a rotation movement to the guidance element, which is required for gas passage, in an axial direction and in a rotation direction. Said gas tap further comprises a movement transfer element fixed on the shaft and having an extension embodied in an angled manner thereon; and an axially movable rod positioned in a parallel manner with respect to the shaft and having a support protrusion at an angle permitting rotational movement such that the angle of the extension meets the angle of the support protrusion and positioned in a manner corresponding to the extension, wherein an extension upper face of the extension and a protrusion lower face of the support protrusion contact in a manner providing advancing of the shaft in the axial direction and wherein said rod advances in an axial manner as an extension lower face of the extension and a protrusion upper face of the support protrusion contact in a manner providing returning of the movement transfer element to an initial position thereof as the shaft is turned in a rotation reverse direction. Thus, as the user only rotates the control element, the burner is ignited by providing axial movement of the shaft without the need to apply pressure. Moreover, meanwhile as the shaft is turned in the rotation direction and as it advances in the axial direction, in order to provide the required movement to be transferred to the guidance element for gas passage, a solution is provided which is simple and easy-to-produce and which has similar dimensions to the dimensions of the gas tap and thus, which does not lead to extra space occupation.
Thus, the displacement distance of the shaft in the axial direction for gas passage and ignition is provided.
Thus, in order to stop gas passage, the shaft is returned to the initial position, in other words, the shaft is returned to the reference position.
According to the invention, the faces of the extension and of the support protrusion, corresponding to and contacting each other, are radially angled. Thus, in the gas tap, during the axial and rotation movements of the shaft, the corresponding faces of the extension and of the support protrusion contact each other and they easily grab each other.
In another possible embodiment, a contact pair of an ignition switch connected to the shaft contact to each other with the shaft advancing in the axial direction during the shaft is turned in the rotation direction. Thus, the igniter becomes functional and burning is realized in the burner.
In another possible embodiment, the gas tap comprises a first flexible element providing fixation of the rod and connected to the rod in the positions where the extension and the support protrusion do not contact. Thus, during pushing the rod axially, energy is stored by means of the compression of the first flexible element, and the rod advances in the axially reverse direction and the rod returns to the initial position by means of said energy.
In another possible embodiment, the gas tap comprises a housing wherein the rod and the first flexible element are positioned and having a stop wall which delimits the axial movement of the rod. Thus, at a first position where the tap shaft is turned in the rotation direction, a stop face is provided for the ceiling of the rod. After a second position where the tap shaft is turned in a reverse rotation direction, during the advance of the rod in the advance reverse direction, a stop wall is provided which returns the support protrusion embodied on the rod to the initial position and which prevents said support protrusion from diverging from the extension and which delimits the movement of the support protrusion.
In another possible embodiment, the rod and the first flexible element are positioned inside a cover of the gas tap. Thus, besides the rod and the first flexible element, the movement transfer element is positioned inside the cover, and they are prevented from occupying excessive space outside of the tap.
In another possible embodiment, the housing is embodied on a periphery of the cover. Thus, a housing is embodied on the periphery of the cover in order to position the rod and the first flexible element.
In another possible embodiment, the movement transfer element is positioned on the section of the shaft remaining inside the cover. Thus, the movement transfer element is prevented from occupying excessive transverse space outside of the tap.
In another possible embodiment, the housing is embodied on a chassis of the cooking device facing the gas tap. Thus, housing embodiment is provided on the chassis of the cooking device.
In another possible embodiment, a pop-out control element is fixed to a free end of the shaft. Thus, pop-out control knobs are used for the control of a gas tap.
In an alternative embodiment of the present invention, said movement transfer element can be positioned at any section on the tap shaft.
In another alternative embodiment of the present invention, the extension provided on the movement transfer element can be embodied in the form of an additional extension on the shaft like a shaft tab.
In another alternative embodiment of the present invention, said movement transfer element can be produced in a one-piece manner with the tap shaft.
In another alternative embodiment of the present invention, said movement transfer element, said rod and said first flexible element can be positioned at the external section of the tap.
In another alternative embodiment of the present invention, in case the movement transfer element, the rod and the first flexible element are positioned at the external section of the tap, a housing, where the first flexible element and the rod are positioned, can be embodied at the external section of the tap.
In another alternative embodiment of the present invention, in case the movement transfer element, the rod and the first flexible element are positioned at the external section of the tap, a stop wall can be embodied for the rod by using a sheet material.
In another alternative embodiment of the present invention, the rod can be produced in a similar manner to different geometrical shapes like rectangular prism, square prism, cylinder having a base and a ceiling.
In another alternative embodiment of the present invention, said first and second flexible element can primarily be a spring or a different item with the same function and which can be compressed and tensioned in a similar manner.
In another alternative embodiment of the present invention, said rod, said movement transfer element, said shaft and cover can be made of a plastic material or a metal material.
In another alternative embodiment of the present invention, the present invention can be used in all gas taps having a gas inlet section and at least one gas outlet section.

BRIEF DESCRIPTION OF THE FIGURES

Figure 1 is the general perspective view of the subject matter gas tap is illustrated.
Figure 2 is the exploded view of the subject matter gas tap.
Figure 3 is the perspective view of the guidance element provided in the subject matter gas tap.
Figure 4 is the perspective view illustrating only the inner section of the shaft, the cover and the inner section of the cover provided in the subject matter gas tap.
Figure 5 is the perspective view illustrating the shaft, the movement transfer element and the rod provided in the subject matter gas tap.
Figure 6 is the frontal view of the movement transfer element provided in the subject matter gas tap.
Figure 7 is the frontal view of the rod provided in the subject matter gas tap.
Figure 8 is the general perspective view of a cooking device having the subject matter gas tap.

THE DETAILED DESCRIPTION OF THE INVENTION

In Figure 1 and Figure 2, a general and an exploded view of the subject matter gas tap (10) are given. In the gas tap (10), in general, there is a body (11), a cover (14) fixed onto the body (11), a shaft (13) passing through the cover (14) and an ignition switch fixed to the shaft (13). In the section of the gas tap (10) remaining inside the cover (14), a movement transfer element (17), a rod (18) and a first flexible element (19) are positioned. On the body (11) of the subject matter gas tap (10), there is a gas inlet section (15) and at least one gas outlet section (16). At the inner section of the body (11), a guidance element (12), having conical form, is bedded. The gas inlet section (15) is connected to a gas line (50) for the input of the gas into the tap body (11). In Figure 3, the perspective view of the guidance element (12) which helps guiding the gas to the gas outlet section (16). On the guidance element (12), an opening (121) and at least one gas guidance hole (122) are embodied. As the guidance element (12) rotates and reaches the desired position, the gas is guided from the gas inlet section (15) to the gas outlet section (16) through the guidance holes (12) with the desired flow rate. The guidance element (12) reaches the desired position for gas passage when the tap shaft (13) is turned. In more details, as the shaft (13) is turned in a rotation direction (R1) and as the shaft (13) advances in an axial direction (D1), a shaft extension (131) engages to the opening (121) provided on the guidance element (12), and the rotation movement is transferred to the guidance element (12). Also a contact pair of the ignition switch contacted to each other during the shaft (13) is turned in a rotation direction (R1) and as the shaft (13) advances in an axial direction (D1).
In Figure 4, the cover (14) of the gas tap (10) is illustrated in cut form in order for the inner section thereof to be seen. As seen here, the movement transfer element (17) is embodied on the section of the shaft (13) remaining inside the cover (14). Moreover, there is a rod (18) and a first flexible element (19) positioned inside the cover (14) and at a periphery of the cover (14). The rod (18) extends along the cover (14) and in a parallel manner with respect to the shaft (13), and the rod (18) is positioned in a manner placing to a housing (141) embodied on a periphery of the cover (14). The housing (141), which at least partially encircles the rod (18) in a manner permitting the axial movement of the rod (18), has a stop wall (142). The first flexible element (19) is positioned between a base (185) of the rod and the body (11). In an embodiment of the invention, this first flexible element (19) is a spring. In Figure 5, another perspective view is given where the shaft (13), the movement transfer element (17), the rod (18) and the first flexible element (19) are illustrated. Here, it is seen that an extension (171) embodied on the movement transfer element (17) and a support protrusion (181) embodied on the rod (18) are positioned in a manner corresponding to each other. A lateral face section, where the extension (171) is positioned on the movement transfer element (17), and a lateral face, where the support protrusion (181) is positioned on the rod (18), face each other. At the frontal view of the movement transfer element (17) in Figure 6, it is seen that the movement transfer element (17) has a cylindrical geometrical shape and there is a channel (174) at the center thereof extending along the movement transfer element (17). The shaft (13) passes through said channel (174), and the movement transfer element (17) at least partially wraps the shaft (13), and it is positioned on the shaft (13) in a manner moving together with the shaft (13). The movement transfer element (17) is placed on the shaft (13) in a cold-fit manner, and it is fixed by means of a connection element (not illustrated in the figure). In a probable embodiment of the invention, said connection element is a pin. Moreover, the extension (171) is embodied on the movement transfer element (17). Said extension (171) is embodied in a radially angled manner in order to provide movement transfer on the lateral face section of the movement transfer element (17). In more details, the angled extension (171) has an inclined extension upper face (172) and an extension lower face (173). The extension upper face (172) has an inclination in a manner providing said advancing distance of the shaft (13). In Figure 7, the frontal view of the rod (18) is given. The rod (18) has a geometric shape which is similar to rectangular prism having a base (185) and a ceiling (184). On the lateral face of said rod (18), radially angled support protrusion (181) is embodied. In more details, the support protrusion (181) has an angled protrusion upper face (183) and a protrusion lower face (182).
In Figure 8, the general perspective view of a gas cooking device (1) is given. Said cooking device (1) can be an oven or a stove used for the cooking process. At least one control element (30) is provided on the control panel provided on the cooking device (1). Said control element (30) is in general a control knob, and it is connected to a free end (132) of the shaft (13) of the subject matter gas tap (10). As the user turns the control knob, the gas tap (10) guides the gas, having specific flow rate, for transferring the gas to at least one burner (40), and burning occurs in the burner (40) by means of ignition. In the probable embodiment of the present invention, the control element (30), which will be fixed to a free end of the shaft (13) of the gas tap (10), will be the pop-out control knob.
The operation of the subject matter gas tap (10) is as follows. At a first position in the gas tap (10), in order to provide gas passage and burning in the burner (40), the movement transfer element (17) and the rod (18) overlap as the control element (30), fixed to an end of the shaft (13), is turned in the rotation direction (R1). In this case, the extension upper face (172) contacts the protrusion lower face (182) and grabbing occurs, and a force is applied to the rod (18) in an axial reverse direction (D2). As the shaft (13) rotates and/or advances, the angled faces of the extension (171) and of the support protrusion (181) corresponding to each other contact and catch each other. As the ceiling (184) of the rod (18) stops and applies pressure to the stop wall (142) provided at the cover (14), and as the shaft (13) continues to be turned, the shaft (13) advances in the axial direction (D1). As the shaft (13) advances in the advancement displacement an igniter becomes functional with the contact pair of the ignition switch contacts to the each other. Also an second flexible element that placed inside the guidance element (12) presses and stores energy. Moreover, as a shaft extension (131), provided at another end of the advancing shaft (13), engages to the opening (121) provided on the guidance element (12), the rotation movement is transferred to the guidance element (12). Thus, the guidance element (12) arrives at a suitable position according to the rotation angle of the shaft (13), and the gas is guided to the gas outlet section (16) with suitable flow rate. Thus, the gas is transferred to the burner (40), and burning is realized in the burner (40) with at least one spark exit from the igniter. Thus, as the user only rotates the control element (30), the burner (40) is ignited without the need to push the control element (30) forwardly in the axial direction (D1) and without the need to apply pressure. After ignition is realized, as the contact between the extension upper face (172) and the protrusion lower face (182) is broken, the shaft (13) advances in the axial reverse direction (D2) with effect of the compressed second flexible element, and it returns to the first displacement position. However, gas passage through the guidance element (12) continues as the rotation position of the shaft (13) remains the same. At a second position of the gas tap (10), in order to stop gas passage, in other words, in order to stop burning in the burner (40), the movement transfer element (17) and the rod (18) overlap as the shaft (13) is turned in a reverse rotation direction (R2). In this case, the extension lower face (173) of the extension (171) begins contacting the protrusion upper face (183) of the support protrusion (181), and it pushes the rod (18) in the axial direction (D1). As the first flexible element (19) is compressed by means of said pushing, energy is stored. When the contact between the extension lower face (173) and the protrusion upper face (183) is broken, the rod (18) advances in the axial reverse direction (D2) by means of tensioning the compressed first flexible element (19) and until the ceiling (184) of the rod (18) contacts the stop wall (142). In more details, by means of the stop wall (142) of the housing (141), the advance of the rod (18) in the axial reverse direction (D2) is delimited. By means of the shaft extension (131) provided at the end of the tap shaft (13), the turning movement in the rotation reverse direction (R2) is transferred to the guidance element (12). In other words, the gas, guided from the gas inlet section (15) to the gas outlet section (16) by means of the guidance element (12) is interrupted. During the shaft (13) is turning in the rotation reverse direction (R2) the contact pair does not contact to each other. Thus, the tap shaft (13) returns to the initial position, in other words, it returns to the reference position where the gas passage is blocked. Thus, the burning in the burner (40) is stopped.
The shaft (13), the cover (14), the movement transfer element (17) and the rod (18), provided in the subject matter gas tap, can be made of a metal material like aluminum, brass, or they can be made of a plastic material.

REFERENCE NUMBERS

1. Cooking device
10. Gas tap
11. Body
12. Guidance element
121. Opening
122. Guidance hole
13. Shaft
131. Shaft extension
132. Free end
14. Cover
141. Housing
142. Stop wall
15. Gas inlet section
16. Gas outlet section
17. Movement transfer element
171. Extension
172. Extension upper face
173. Extension lower face
174. Channel
18. Rod
181. Support protrusion
182. Protrusion lower face
183. Protrusion upper face
184. Ceiling
185. Base
19. First flexible element
30. Control element
40. Burner
50. Gas line
D1. Axial direction
D2. Axial reverse direction
R1. Rotation direction
R2. Rotation reverse direction

Claims

A cooking device (1) having a gas tap (10) comprising a body (11), a guidance element (12) bedded at an inner section of the body (11), a second flexible element placed inside said guidance element (12), a shaft (13) having a shaft extension (131), said shaft extension (131) engaging to an opening (121) provided on the gas guidance element (12), in order to transfer a rotation movement to the guidance element (12), which is required for gas passage, in an axial direction (D1) and in a rotation direction (R1), characterized in that the gas tap (10) further comprises a movement transfer element (17) fixed on the shaft (13) and having an extension (171) which is embodied in an angled manner thereon; and an axially movable rod (18) positioned in a parallel manner with respect to the shaft (13) and having a support protrusion (181) at an angle permitting rotational movement such that the angle of the extension (171) meets the angle of the support protrusion (181) and positioned in a manner corresponding to the extension (171), wherein an extension upper face (172) of the extension (171) and a protrusion lower face (182) of the support protrusion (181) contact in a manner providing advancing of the shaft (13) in the axial direction (D1) and wherein said rod (18) advances in an axial manner as an extension lower face (173) of the extension (171) and a protrusion upper face (183) of the support protrusion (181) contact in a manner providing returning of the movement transfer element (17) to an initial position thereof as the shaft (13) is turned in a rotation reverse direction (R2).
A cooking device (1) according to any one of the preceding claims, wherein a contact pair of an ignition switch connected to the shaft (13) contact to each other with the shaft (13) advancing in the axial direction (D1) during the shaft (13) is turned in the rotation direction (R1).
A cooking device (1) according to any one of the preceding claims, wherein the gas tap (10) comprises a first flexible element (19) providing fixation of the rod (18) and connected to the rod (18) in the positions where the extension (171) and the support protrusion (181) do not contact.
A cooking device (1) according to any one of the preceding claims, wherein the gas tap (10) comprises a housing (141) wherein the rod (18) and the first flexible element (19) are positioned and having a stop wall (142) which delimits the axial movement of the rod (18).
A cooking device (1) according to Claim 3 and 4, wherein the rod (18) and the first flexible element (19) are positioned inside a cover (14) of the gas tap (10).
A cooking device (1) according to Claim 5, wherein the housing (141) is embodied on a periphery of the cover (14).
A cooking device (1) according to Claim 5 and 6, wherein the movement transfer element (17) is positioned on the section of the shaft (13) remaining inside the cover (14).
A cooking device (1) according to Claim 4, wherein the housing (141) is embodied on a chassis of the cooking device (1) facing the gas tap (10).
A cooking device (1) according to Claim 1, wherein a pop-out control element (30) is fixed to a free end (132) of the shaft (13).