Household appliance with movable locking element

Abstract

Household appliance (1) with a closure element (14) of an access opening (13), with a closing mechanism and with a connecting kinematics (17). The household appliance (1) is characterized by a pivot point (14a), a rotary element receptacle (14c), a transmission element (14d) and a spring element (14g), which are designed, • so that the rotary element (17e) of the connecting kinematics (17) moves along the elongated rotary element receptacle (14c) of the closure element (14) towards the transmission element (14d) and the transmission element (14d) pivots against the spring element (14g) and thereby creates a larger lever arm between the spring element (14g) and the pivot point (14a) of the closure element (14) when the rotary element (17e) of the connecting kinematics (17) is moved by the drive unit (18) into the position closing the access opening (13), and • so that the rotary element (17e) of the connecting kinematics (17) moves along the elongated rotary element receptacle (14c) of the closure element (14) away from the transmission element (14d) and the spring element (14g) pivots the transmission element (14d) and thereby creates a smaller lever arm between the spring element (14g) and the pivot point (14a) of the closure element (14) when the rotary element (17e) of the connecting kinematics (17) is moved by the drive unit (18) out of the position closing the access opening (13).

Description

The invention relates to a household appliance with a movable closure element.Cooking devices are known which have a cooking chamber which is formed immovably, i.e. fixed, with the cooking device and in which the items to be cooked can be arranged in or on a cookware item and can be cooked when the cooking chamber of the cooking device is closed. Such a cooking appliance can be, for example, an oven, a steam cooker, a combination appliance of an oven with steam cooker and the like. Cooking appliances of this type with a fixed cooking chamber usually have an overall height of approximately 45 cm at least in Germany along the vertical axis, wherein ovens are also customary having an overall height of approximately 60 cm.Common to cooking appliances of this type having a fixed cooking chamber is that they have an outer housing as an outer housing, which substantially encloses the cooking appliance outwards and protects the individual components and elements thereof and makes them handleable together. An interior space is formed within the cooking appliance, which represents the cooking chamber and is substantially surrounded by an inner housing as an inner housing, also referred to as a cooking chamber muffle or muffle. Between the inner housing and the outer housing, a housing space is formed as an intermediate space, in which functional elements of the cooking appliance, such as a controller or a control unit, an electrical energy supply and other components, which serve for the intended use of the cooking appliance, can be arranged. Viewed from the front in depth, i.e. viewed from the point of view of a user, the outer housing or a panel in the form of a furniture material or in the form of an operating panel and the like together with the inner housing closes off the housing space, so that the housing space is not accessible to the user.The interior of the cooking appliance has a through opening in the depth toward the front as an access opening, through which the interior of the cooking appliance is accessible to the user in order to insert cookware into the interior of the cooking appliance as its cooking chamber and to arrange them there, and in order to remove cookware from the interior of the cooking appliance and to remove them from there after the cookware has been treated. The access opening can be opened by the user by means of a closure element, for example in the form of a laterally pivotable door, a downwardly pivotable flap and the like, in order to be able to access the interior of the cooking appliance, as described above, or in order to close the interior of the cooking appliance and to carry out the cooking process or the cooking process. Such a closure element can be designed closed or have a viewing window in order to allow the user to see into the closed interior of the cooking appliance.Cooking appliances of this kind with a fixed cooking chamber are usually designed as built-in appliances or as built-in kitchen appliances in order to be arranged in a fixed manner with their outer housing in kitchen furniture such as, for example, in built-in cabinets of a kitchen in a space-saving manner and to be closed with their closure element, optionally additionally with their panel, see above, in a planar manner towards the front of the user flush with the surfaces of the remaining cooking appliances, drawers, doors and the like of the kitchen furniture, which can improve the visual impression for the user. However, such cooking devices can also be designed as individual separate devices, which can be set up and operated in particular on a working surface of a kitchen line. This can simplify flexibility of use and purchase and disposal.In cooking appliances of this type, the closure element, such as a door arranged such that it can be pivoted laterally or a flap which can be pivoted upwards from below, is operated manually by a person as a user, i.e. is gripped by the fingers of a hand on a handle, bracket or the like, and is then moved or pivoted back and forth between the fully open state in order to be able to access the cooking chamber as easily as possible and the fully closed state in order to carry out the cooking process. This can also be effected by means of a translatory movement back and forth along the longitudinal axis in that the closure element can be extended and inserted. Mixed rotational-translatory pivot movements are also possible by means of suitable kinematics. In any case, intermediate positions are also possible in order to open the cooking chamber only one gap, for example for ventilating or cooling after a cooking process.In order to relieve the user from performing these movements between the fully open state and the fully closed state, it is also known to use a drive, in particular an electric drive, for this purpose. The pivoting movements described above are here converted by means of a motor which can be driven in rotation, in particular electrically, and which can transmit its rotational movement by means of a crank into a translatory movement along the longitudinal axis, which can then, comparable to the movement of the hand of the user, pivot the closure element back and forth or up and up about its rotational axis.For example, for ovens, steam cookers and combination appliances thereof, it is widely used that the closure element is designed as a flap which can be folded up and down by the user about a pivot axis running along the transverse axis or by motor by means of a pivot movement. In this case, 0° corresponds to the pivoting movement of the fully closed access opening, in which the closure element as a flap points directly upward in the vertical direction. 90° of the pivoting movement corresponds to the fully open access opening with a horizontally oriented closure element or horizontally oriented flap.It is known in such pivotable closure elements or flaps, such as oven doors, for example, that an additional mechanism, such as a mechanical spring element, is usually present in order to securely press the closure element against a seal of the access opening in the folded-up state, i.e. in the position closing the access opening, and thus to securely close the access opening in a vapor- and liquid-tight manner. This closing mechanism thus applies a closing moment to the closure element or to the flap, which must be additionally overcome by the drive of the automatic or automatic movement mechanism in order to move the closure element. The drive must therefore be designed to be correspondingly powerful in order to overcome the closing moment of the closing mechanism for opening the closure element.However, since this closing mechanism only acts when the closure element is completely closed and thus the corresponding comparatively high closing moment also acts only in this position of the closure element, the correspondingly powerful drives or their motors have hitherto been considerably oversized, which concerns the remaining movement of the closure element for opening the access opening.Generic cooking devices are known from the publications EP 2 759 669 A2 and EP 1 548 366 A2 and DE 20 2020 104 182 U1 and CN 110 761 648 A.The invention addresses the problem of providing a household appliance, preferably a cooking appliance, with a closure element which is movable, in particular by motor, so that when the closure element is automatically opened, a comparatively high torque can be applied with a comparatively low-power drive. In particular, a closing torque of the closed closure element should be able to be overcome with a drive with comparatively low power. In particular, a drive is to be able to be used which is dimensioned to fit the entire movement of the automatic opening of the closure element. In any case, this should be possible in a manner that is as simple as possible, saves installation space and or is cost-effective.At least, an alternative to the known household appliances of this type is to be created.According to the invention, this problem is solved by a household appliance having the features of independent claim 1. Advantageous embodiments and further developments of the invention are evident from the dependent claims which follow.The invention thus relates to a household appliance, preferably a cooking appliance, having an interior which is designed to receive at least one object to be treated through an access opening along the longitudinal axis, having a closure element which is designed to close and release the access opening of the interior from the front by pivoting upwards and downwards about a pivot point, having a closing mechanism which is designed to exert a closing moment on the closure element when the pivoted-up closure element closes the access opening, and having a connection kinematics which is designed to transmit a drive force of a drive unit to the closure element and thereby to pivot the closure element upwards and downwards and to overcome the closing moment of the closing mechanism when pivoting the closure element downwards.The household appliance can be in particular a cooking appliance, but also another household appliance such as a washing machine, a dryer or the like. In this case, the object to be treated may be laundry to be washed or dried. As the cooking appliance, this may be an oven, a microwave-integrated oven, a microwave itself, a dialog oven, a steam oven, a steam oven and the like. In this case, the object to be treated can be a food to be cooked, i.e. a food to be cooked.The household appliance is characterized by an elongate rotary element receptacle of the closure element which receives a rotary element of the connection kinematics rotatably and translationally movably, a transmission element which is arranged rotatably on the closure element, and a spring element which is configured to press the transmission element of the closure element away from the access opening against the rotary element of the connection kinematics and thereby translationally move the rotary element of the connection kinematics, wherein the pivot point, the rotary element receptacle, the transmission element and the spring element are configured,• so that the rotating element of the connection kinematics moves along the elongate rotating element receptacle of the closure element towards the transmission element and the transmission element pivots against the spring element and thereby generates a greater lever arm between the spring element and the pivot point of the closure element when the rotating element of the connection kinematics is moved by the drive unit into the position closing the access opening, and• so that the rotating element of the connection kinematics moves away from the transmission element along the elongate rotating element receptacle of the closure element, and the spring element pivots the transmission element and thereby generates a smaller lever arm between the spring element and the pivot point of the closure element when the rotating element of the connection kinematics is moved by the drive unit out of the position closing the access opening.In other words, in the case of such automatic movement mechanisms, a spring force acts on an inclined plane by a roller. Multiplying the proportional spring force by the resulting lever arm produces the closing moment for a hinge. The connecting element or the connecting rod, which drives a rotating element in the form of a rivet, ensures, when moved forwards, i.e. towards the user, by the drive, that the closure element or its frame or blade rotates about the pivot point, so that an opening and closing process can take place.According to the invention, the frame or tongue of the closure element is extended by a rotatable element or the tongue is embodied in two parts, so that an additional component in the form of a transmission element or a contour is supplemented. By correctly positioning the pivot point on the tongue, the lever arm of the spring force and thus the closing moment before the door opening can be significantly reduced.If the household appliance is closed, the closing moment is very high, as previously known. The elements of the household appliance according to the invention cooperate in such a way that the pivot point of the contour is arranged such that the resulting spring force of a roller of the spring passes on the left of the pivot point of the contour, so that the contour would rotate counterclockwise if the rivet of the connecting rod in the slot would not prevent this rotation. Due to the low lever arm of the resulting spring force with respect to the pivot point of the contour, the moment which the contour attempts to rotate counter-clockwise is not particularly strong, so that the rivet cannot slide to the left by this supporting force.If, however, the connecting rod is now moved to the left by the motor, the rivet is only moved to the left in the slot. The rivet releases the described rotation of the contour. By rotating the contour, the lever arm of the resulting spring force relative to the pivot point of the blade is significantly reduced, so that the closing torque is significantly reduced.During the closing movement of the closure element, the rivet is displaced to the right in the slot, so that the contour is rotated again to its initial position. Since the roller of the spring does not abut the contour at this time of the opened closure element, the motor has to apply a lower force at this time. Thereafter, the closing process is always carried out by pulling the connecting piece on the rivet until the closure element door is completely closed and the closing torque is again high.According to one aspect of the invention, the elongate rotary element receptacle of the closure element is aligned along the longitudinal axis when the closure element is in the position in which it closes the access opening. This can represent a specific possibility of implementation.According to a further aspect of the invention, the spring element is oriented along the longitudinal axis. This can represent a specific possibility of implementation.According to a further aspect of the invention, the spring element has a roller with which the spring element is in contact with the transmission element. This can represent a specific possibility of implementation.According to a further aspect of the invention, the closure element has a frame which is rotatably connected to a housing, preferably a hinge body, by means of the pivot point, wherein the transmission element is rotatably connected to the frame by means of a pivot point. This can represent a specific possibility of implementation.According to a further aspect of the invention, the pivot point of the frame and the pivot point of the transmission element are arranged at the same height along the vertical axis when the closure element is in the position closing the access opening. This can represent a specific possibility of implementation.According to a further aspect of the invention, the elongate rotary element receptacle is arranged vertically along the longitudinal axis centrally between the pivot point of the frame and the pivot point of the transmission element when the closure element is in the position closing the access opening. This can represent a specific possibility of implementation.According to a further aspect of the invention, the connection kinematics has a drive lever which is designed and arranged to be moved rotationally by the drive unit, and the connection kinematics has a coupling element which is designed and arranged to transmit the rotational movement of the drive lever into a substantially translatory movement along the longitudinal axis. This can enable a specific possibility of implementation, comparable connecting rods and pistons.According to a further aspect of the invention, the drive unit has a, preferably electric, motor which is designed to move the connection kinematics. This may represent a possibility of implementation.An exemplary embodiment of the invention is illustrated purely schematically in the drawings and is described in more detail below. It shows FIG. 1 shows a perspective illustration of a household appliance according to the invention in the form of a cooking appliance with an open access opening from obliquely the front above; FIG. 2 shows a lateral view with a partial longitudinal section of a connection kinematics of the cooking appliance according to the invention; FIG. 3 shows a lateral view of a frame or tongue of a closure element of the domestic appliance in a position closing the access opening; FIG. 4 shows a detailed view of the lower region of the frame of FIG. 3 ; FIG. 5 shows a lateral view of the frame or tongue of the closure element of the domestic appliance at the beginning of an opening movement out of the position closing the access opening; and FIG. 6 shows a detailed view of the lower region of the frame of FIG. 5.The above-mentioned procedure is described. Figures are viewed in Cartesian coordinates. A longitudinal axis X extends, which can also be referred to as depth X or length X. A transverse axis Y extends perpendicular to the longitudinal axis X, which can also be referred to as width Y. Extending perpendicular to both the longitudinal axis X and the transverse axis Y is a vertical axis Z, which can also be referred to as height Z and corresponds to the direction of gravity. The longitudinal axis X and the transverse axis Y together form the horizontal X, Y, which can also be referred to as the horizontal plane X, Y.FIG. 1 shows a perspective illustration of a household appliance 1 according to the invention in the form of a cooking appliance 1 with an open access opening 13 obliquely from the front above.A household appliance 1 or cooking appliance 1 according to the invention is considered using the example of an oven 1. The oven 1 has an outer housing 10, which can also be referred to as an outer housing 10 and substantially closes or encloses the oven 1 outwards. The outer housing 10 represents a body, a frame or a housing of the household appliance 1. the outer housing 10 closes off along the longitudinal axis X toward the front, i.e. toward the user, in the upper region with a cover 10 a. Inside the outer housing 10 an inner housing 11 is arranged, which can also be referred to as inner housing 11. The inner housing 11 closes off from both sides with the outer housing 10 along the longitudinal axis X toward the rear, along the vertical axis Z toward the bottom and upward, and along the transverse axis Y, so that an intermediate space is formed between the outer housing 10 and the inner housing 11, which can also be referred to as housing space. This intermediate space represents the interior of the oven 1.The inner housing 11 furthermore substantially encloses an inner space 12 in which a cooking process can be carried out. For this purpose, corresponding elements for heating the interior space 12 (not shown) are arranged in the intermediate space or in the cooking chamber 12. Accordingly, the interior space 12 can also be referred to as a cooking chamber 12.The cooking chamber 12 is accessible to the user from the front along the longitudinal axis X through an access opening 13 which is located below the panel 10 a. The access opening 13 can be closed and opened by means of a closure element 14 in the form of a flap 14. For this purpose, the flap 14 is connected to the outer housing 10 of the oven 1 such that it can be pivoted upwards about the transverse axis Y by means of at least one hinge (not shown), so that the flap 14 can be pivoted upwards by the user in order to close the access opening 13 and can be pivoted downwards in order to release the access opening 13 and access the cooking chamber 12, see FIG. 1.The cooking chamber 12 has a side wall 12 aon each side along the transverse axis Y, on each side of which a removable receiving grid 15 is arranged. To each receiving grid 15 at the same height along the vertical axis Z a telescopic rail 16 is removably attached, which together form a pair of telescopic rails 16. The telescopic rails 16 are each formed in three parts along the longitudinal axis X (not shown), so that a respective front rail element is connected to a rear rail element of the telescopic rail 16 by means of a central rail element, wherein the rear rail element is held fixedly and removably on the respective receiving grid 15.A cookware item such as a baking tray (not shown) can be placed by the user onto the pair of telescopic rails 16 or the front rail elements thereof in order to be pushed into the cooking chamber 12 along the longitudinal axis X and pulled out of the cooking chamber 12. This can make it easier for the user to insert the baking tray into the cooking chamber 12 and remove it from the cooking chamber 12.FIG. 2 shows a lateral view with a partial longitudinal section of a connection kinematics 17 of the cooking appliance 1 according to the invention.The connection kinematics 17 is arranged laterally in the intermediate space of the oven 1 in order to be used by the user to actuate the flap 14 as a closure element 14 by motor, in order not to have to do this itself. The motorized movement, in particular for opening the closed flap 14 and then again for closing the opened flap 14, cf. FIG. 1, can be effected by the user, in particular by actuating a corresponding operating element (not illustrated), which can be arranged on the outside on the flap 14 (not illustrated) and or on the panel 10 a(not illustrated).To implement these movements, the baking oven 1 has a drive unit 18 in the intermediate space. A motor holder 18 aof the drive unit 18 has an electric motor (not shown), which is fixedly fastened on the stator side to the motor holder 18 a. On the rotor side, the electric motor can transmit its rotational movement A via a motor pivot point 18 b,depending on the current flowing in one or the other rotational direction, to a drive lever 17 aof the connection kinematics 17 upon actuation.The drive lever 17 aacts as a crank drive, similar to the connecting rod and piston, and transmits the rotational movement A to a coupling element 17 bof the connection kinematics 17 as a coupling rod 17 b, which leads to a translatory displacement or to a pushing movement B of a spring holder 17 cof the connection kinematics 17. The coupling element 17 or the coupling rod 17 has a first part 17 baas an inner part 17 baand a second part 17 bbas an outer part 17 bb, which are translationally movable relative to one another by a rotational mounting movement by means of an external thread (not designated) of the inner part 17 baand by means of an internal thread (not designated) of the outer part 17 bb, i.e. can execute a length change, so that the coupling rod 17 bcan be adjusted to the desired length with respect to mounting and manufacturing tolerances of the connection kinematics 17 and then fixed. At the opposite ends, the inner member 17ba is pivotally connected to the drive lever 17a, and the outer member 17bb is pivotally connected to the spring holder 17c. In this case, the spring holder 17 cis supported by means of a spring (not illustrated) in the form of a helical spring against a guide element (not illustrated) of the outer housing 10, as a result of which a closing force or a closing torque is generated which tightly closes the flap 14 in the folded-up closed state of the access opening 13. In order to ensure this, the domestic appliance 1 has a closing mechanism (not shown) which is designed to exert a closing moment on the closure element 14 when the upwardly pivoted closure element 14 closes the access opening 13. The closing mechanism is designed in the form of a mechanical suspension which is dimensioned and arranged accordingly.The spring holder 17 ctransmits the pushing movement B via a connecting element 17 dof the connecting kinematics 17 in the form of a connecting rod 17 dor a connecting piece 17 dto a frame 14 bor to a tongue 14 b, see FIGS. 3 to 6, of the flap 14, as a result of which a pivoting movement C about a pivot point 14 aof the flap 14 takes place, which causes an opening or closing movement D of the flap 14. For this purpose, the end of the connecting piece 17 dfacing away from the spring holder 17 cis connected rotatably to the frame 14 bby means of a rotating element 17 ein the form of a rivet 17 eand is held rotatably here in a rotating element receptacle 14 cof the closure element 14, see FIGS. 4 and 6. Around the pivot point 14 a, the flap 14 is arranged on a hinge body 10 bso as to be pivotable by means of a hinge (not illustrated). The hinge body 10 bis fixedly fastened to a body or to a frame, which is represented in FIG. 2 by the outer housing 10.If one now considers not only the pure movement of the connection kinematics 17 together with the flap 14, but also the forces which occur as a result, then it arises that the reaction forces which are generated can be so high that the adjacent components of the outer housing 10, such as the base trough, mounting rear wall and the like, can be subject to a plastic deformation. For this reason, the forces are absorbed where the rigidity of the outer housing 10 is as high as possible. This is the case in the front region at the pivot point 14 aof the flap 14. A support element 19 is therefore provided, which can also be referred to as a support plate 19 or as a support bracket 19. The bracket 19 transmits the torque of the motor to the outer case 10, i.e., the floor pan, the front frame, and the side walls via the hinge body 10 b.It should be emphasized here that the forces which are produced do not have a constant direction of force on account of the drive lever 17 aas a crank drive. The direction of the force changes during the movement sequence with the angle of the door position, so that forces in at least two spatial directions must be absorbed. The support bracket 19 is firmly connected to the hinge body 10 b. In order to ensure adequate rigidity of the support bracket 19, possible bends, bends or depressions are possible.FIG. 3 shows a lateral view of the frame 14 bor tongue 14 bof the closure element 14 of the household appliance 1 in a position closing the access opening. FIG. 4 shows a detailed view of the lower region of the frame 14 bof FIG. 3, FIG. 5 shows a lateral view of the frame 14 bor tongue 14 bof the closure element 14 of the domestic appliance 1 at the beginning of an opening movement out of the position closing the access opening. FIG. 6 shows a detailed view of the lower region of the frame 14 bof FIG. 5.According to the invention, an elongate rotary element receptacle 14 cis thus provided on the side of the frame 14 bof the closure element 14, which receptacle receives the already mentioned rivet 17 eas a rotary element 17 eof the connection kinematics 17 or its connecting rod 17 din a rotatably and translationally movable manner, wherein the translatory mobility is made possible by the formation of the elongate rotary element receptacle 14 cof the frame 14 bof the closure element 14 as an elongate hole. If the closure element 14 is in the position closing the access opening 13, the elongate rotary element receptacle 14 cof the closure element 14 is aligned along the longitudinal axis X.The closure element 14 also has a transmission element 14 d, which is arranged rotatably on the closure element 14 or on its frame 14 b. As already mentioned, the closure element 14 and more precisely its frame 14 bis rotatably connected by means of the pivot point 14 ato a housing in the form of the hinge body 10 b. Furthermore, the transmission element 14 dis in turn rotatably connected to the frame 14 bby means of a pivot point 14 e. In this case, the pivot point 14 aof the frame 14 band the pivot point 14 eof the transmission element 14 dare arranged at the same height along the vertical axis Z when the closure element 14 is in the position closing the access opening 13. The elongate rotary element receptacle 14 cis also arranged along the longitudinal axis X centrally between the pivot point 14 aof the frame 14 band the pivot point 14 eof the transmission element 14 dwhen the closure element 14 is in the position closing the access opening 13.Furthermore, a spring element 14 gis provided, which is designed to press the transmission element 14 dof the closure element 14 away from the access opening 13 against the rotary element 17 eof the connection kinematics 17 and thereby move the rotary element 17 eof the connection kinematics 17 in a translatory manner. The spring element 14 gis oriented along the longitudinal axis X. The spring element 14 ghas a roller 14 f, with which the spring element 14 gis in contact with the transmission element 14 d.According to the invention, the pivot point 14 a, the rotary element receptacle 14 c, the transmission element 14 dand the spring element 14 gare formed such that the rotary element 17 eof the connection kinematics 17 moves along the elongate rotary element receptacle 14 cof the closure element 14 towards the transmission element 14 dand the transmission element 14 dplews against the spring element 14 gand thereby generates a greater lever arm between the spring element 14 gand the pivot point 14 aof the closure element 14 when the rotary element 17 eof the connection kinematics 17 is moved by the drive unit 18 into the position closing the access opening 13.Furthermore, the pivot point 14 a, the rotary element receptacle 14 c, the transmission element 14 dand the spring element 14 gare formed such that the rotary element 17 eof the connection kinematics 17 moves away from the transmission element 14 dalong the elongate rotary element receptacle 14 cof the closure element 14 and the spring element 14 gboves the transmission element 14 dand thereby generates a smaller lever arm between the spring element 14 gand the pivot point 14 aof the closure element 14 when the rotary element 17 eof the connection kinematics 17 is moved by the drive unit 18 out of the position closing the access opening 13.List of Reference Numerals (Part of the Description)A Rotational movement of the motor B Pushing movement of the spring holder 17 cC Pivoting movement about the pivot point 14 aof the closure element 14 D Opening or closing movement of the closure element 14 X Longitudinal axis; depth; length Y Transverse axis; width Z Vertical axis; height X, Y Horizontal; horizontal plane 1 Domestic appliance; cooking appliance; oven 10 Outer housing; outer housing 10 a Blende 10 b Scharnier body 11 Inner housing; inner housing 12 Interior space; cooking chamber 12 a Seitenwände walls of the cooking chamber 12 13 Access opening 14 Closure element; Flap 14 a: Pivot point of the closure element 14 14 b: Frame or tongue of the closure element 14 14 c: Elongate rotary element receptacle or slot of the closure element 14 14 d: Transmission element of the closure element 14 14 e: Pivot point of the transmission element of the closure element 14 14 f: Roller of the closure element 14 g: Spring element of the closure element 14 15: Receptacle grid 16: Telescopic rails 17: Connection kinematics 17 a: Drive lever 17 b: Coupling element; Coupling rod 17 ba: First part or inner part of the coupling element 17 17 bb: Second part or outer part of the coupling element 17 17 c: Spring holder 17 d: Connection element; Connection rod 17 e: Rotary element; Rivet 18: Drive unit 18 a: Motor holder 18 b: Motor pivot point 19: Support element; Support plate; Support angle

Claims

Domestic appliance (1), preferably cooking appliance (1), having an interior (12) which is designed to receive at least one object to be treated through an access opening (13) along the longitudinal axis (X), having a closure element (14) which is designed to close and release the access opening (13) of the interior (12) from the front by pivoting upwards and downwards about a pivot point (14a), having a closing mechanism which is designed to exert a closing moment on the closure element (14) when the pivoted-up closure element (14) closes the access opening (13), and having a connection kinematics (17) which is designed to be closed, transmitting a driving force of a drive unit (18) to the closure element (14) and thereby pivoting the closure element (14) up and down and overcoming the closing moment of the closing mechanism when pivoting the closure element (14) down, characterized an elongate rotary element receptacle (14c) of the closure element (14), which receives a rotary element (17e) of the connection kinematics (17) in a rotationally movable and translationally movable manner, a transmission element (14d) which is arranged in a rotationally movable manner on the closure element (14), and a spring element (14g) which is configured to press the transmission element (14d) of the closure element (14) away from the access opening (13) against the rotary element (17e) of the connection kinematics (17) and thereby move the rotary element (17e) of the connection kinematics (17) in a translatory manner, wherein the pivot point (14a), the rotary element receptacle (14c), the transmission element (14d) and the spring element (14g) are configured, • so that the rotating element (17e) of the connection kinematics (17) moves along the elongate rotating element receptacle (14c) of the closure element (14) towards the transmission element (14d) and the transmission element (14d) pivots against the spring element (14g) and thereby generates a greater lever arm between the spring element (14g) and the pivot point (14a) of the closure element (14) when the rotating element (17e) of the connection kinematics (17) is moved by the drive unit (18) into the position closing the access opening (13), • so that the rotary element (17e) of the connection kinematics (17) moves away from the transmission element (14d) along the elongate rotary element receptacle (14c) of the closure element (14), and the spring element (14g) pivots the transmission element (14d) and thereby generates a smaller lever arm between the spring element (14g) and the pivot point (14a) of the closure element (14) when the rotary element (17e) of the connection kinematics (17) is moved by the drive unit (18) out of the position closing the access opening (13).Household appliance (1) according to claim 1, wherein the elongate rotary element receptacle (14c) of the closure element (14) is aligned along the longitudinal axis (X) when the closure element (14) is in the position closing the access opening (13).Household appliance (1) according to claim 1 or 2, wherein the spring element (14g) is oriented along the longitudinal axis (X).Household appliance (1) according to one of the preceding claims, wherein the spring element (14g) has a roller (14f), with which the spring element (14g) is in contact with the transmission element (14d).Household appliance (1) according to one of the preceding claims, wherein the closure element (14) has a frame (14b) which is rotatably connected to a housing, preferably a hinge body (10b), by means of the pivot point (14a), wherein the transmission element (14d) is rotatably connected to the frame (14b) by means of a pivot point (14e).Household appliance (1) according to claim 5, wherein the pivot point (14a) of the frame (14b) and the pivot point (14e) of the transmission element (14d) are arranged at the same height along the vertical axis (Z) when the closure element (14) is in the position closing the access opening (13).Household appliance (1) according to claim 5 or 6, wherein the elongate rotary element receptacle (14c) is arranged along the longitudinal axis (X) centrally between the pivot point (14a) of the frame (14b) and the pivot point (14e) of the transmission element (14d) when the closure element (14) is in the position closing the access opening (13).Domestic appliance (1) according to one of the preceding claims, wherein the connection kinematics (17) has a drive lever (17a) which is designed and arranged to be rotationally moved by the drive unit (18), and wherein the connection kinematics (17) has a coupling element (17b) which is designed and arranged to transmit the rotational movement of the drive lever (17a) into a substantially translatory movement along the longitudinal axis (X).Domestic appliance (1) according to one of the preceding claims, wherein the drive unit (18) has a, preferably electric, motor which is configured to move the connection kinematics (17).

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