ES2278826T3 - APPLIANCES APPLIED IN PARTICULAR A KITCHEN OVEN. - Google Patents

Abstract

Household appliance, in particular a kitchen oven, with a carriage (11) and a door (12), as well as a spring device (13, 14), whose carriage (11) can be removed driven by the force of the device spring (13, 14), which in the situation of insertion of the carriage (11) acts on the carriage (11) in the extraction direction (15) with a force less than in a situation of at least partial removal of the carriage (11), characterized in that the force acting in the extraction direction (15) is reduced in the carriage insertion situation (11) by the action of a lever mechanism (22).

Description

Home appliance in particular an oven Cooking

The invention starts from an apparatus appliance according to the preamble of claim 1.

From JP 10 141 674 A a known receiver apparatus for a grill provided in a movable position in a grill chamber A grill grill can be extracted from the grill chamber with a grill handle, where this movement is supported by a spring.

From DE 40 23 949 A1 a known appliance, in particular a kitchen oven. The oven of kitchen has an oven muffle whose feeding hole is can be closed by a kitchen oven door fastened in fixed angle to sliding trains or a kitchen cart, and movable as a drawer. Sliding trains are guided by sliding rails below the oven muffle.

JP 62 11 9329 A shows an oven of kitchen with a car driven by a spring device in the extraction direction. To facilitate permanence in the closing position, another spring applies a closing force on the opposite direction.

On the other hand the kitchen oven has a spring ratchet device arranged on the rail of displacement of at least one sliding train, which presses the Kitchen oven door against a muffle flange. He Spring ratchet device has a slide guide with spring loaded and inclined guide sections along the scroll rail in opposite directions, which collaborate with support rollers attached to the sliding trains.

The objective of the invention is to offer a generic appliance for a more comfortable use, keeping the Once reduced construction costs. The goal is resolved, according to the invention, by means of the characteristics of the claim 1, while from the subclaims some configurations and improvements can be deduced advantageous of the invention.

The invention is based on an appliance, in particular a kitchen oven, with a car and a door, and also With a spring device.

It is proposed that the car can be removed driven by a force of the spring device, and that the spring device in the car insertion situation act on the car, in the direction of extraction, with less force that in a situation of at least partial extraction of the car.

However, the force acting in the direction extraction in the car insertion situation can be reduce by means of a lever mechanism and, in particular, by lever conditions that vary with carriage movement. With a mechanism of levers can be achieved a mechanism especially simple from the point of view of construction and Low cost.

In a simple embodiment, from the point of view of the construction, you can get an appliance of convenient handling, in which manual removal is unnecessary or It is well supported. The force can be set so that it is limited to the carriage insertion situation, or so that reduce with the movement of the car in its insertion situation, whereby the car can be introduced especially comfortable. In addition, the reduced force in the opening direction, at less in the insertion situation, it allows to achieve a closure door lock, in particular with a small closing force, which can be produced by a force of gravity of the car, a hitch mechanism and / or a closing spring. The force that impact on the direction of extraction can be reduced so staggered or continuous with different devices whose logic the specialist will recognize, for example, using a device which, with the introduction of the car, displaces a seat of a spring that generates the force in the direction of extraction and dispenses said spring, or with a spring provided with the corresponding characteristic spring curve, etc.

In another configuration of the invention it is proposed that the lever mechanism has levers attached to each other in articulated form, which basically form a quadrilateral, preferably a rhombus, where a first diagonal of the quadrilateral runs parallel to the direction of extraction, and in a second diagonal of the quadrilateral, which runs in perpendicular to the direction of extraction, a spring is placed of traction that compresses the levers. In a simple way, from the point of view of construction and with few components, it can prevent relative movement at a point of articulation located between the lever mechanism and the carriage, and at a point of joint located between the lever mechanism and a piece of home appliance housing. However, we can think of principle, in other leverage mechanisms whose logic knows the specialist, for example, the lever mechanism may be formed by a single rotating lever, etc.

On the other hand it is proposed that the door, in its closed position, be loaded with a closing force through of the spring device, whereby said door can be closed especially safe, with a sealing effect high.

If the spring device has at least a bistable spring unit, with the spring unit you can achieve, in particular with a spring, both a force in the door closing direction as a force in the direction of car removal. Additional components can be saved and construction space

However, if the spring device includes at least a first spring unit that acts on the door closing direction and a second one acting on the direction of removal of the car, the forces acting in different senses can be achieved especially simple, from the point of view of construction, and possibly they can also be sized in different ways. In addition, the closing force of the first spring unit, in in particular, it can be advantageously planned so that it can be reduce through an activation unit for opening the door, so that the car, after a reduction in force closing, can be extracted automatically driven by the second spring unit However, in principle it can be done also a bistable spring unit with the corresponding activation unit On the other hand you can think of the combination of a bistable spring unit with a second spring unit, thereby in one position, or along a travel of the carriage, the spring units can act in opposite direction and in a complementary way on the car and / or on  the door.

To activate the activation unit with a reduced force said unit is advantageously designed with a actuator, for example with an electromagnetic actuator, electromotorized, pneumatic and / or hydraulic, etc. It also fits the possibility of designing the activation unit so that you can activate purely manually, for example with a Bowden cable and / or with an activation linkage, etc.

The door is advantageously attached to the car, and Stays with it in a scrollable position. In a kitchen oven They can hang kitchen trays directly on the door, you can dispense with a rack that holds said kitchen trays and an advantageous degree of accessibility can be achieved. For other part the closing force can be advantageously transferred to the Door through the car. However, the door can be designed also so that it is housed in a rotating position. Here the carriage can be maintained in its insertion situation through the door or through an additional unit, for example, a unit spring and / or a hitch unit, etc.

If the spring device, starting from a car insertion situation, acts on the car only in a first part of the total route, advantageously until the about half, with the force in the extraction direction, a harmonic movement of the car and, in particular, can be obtained automatically, in the extraction direction and towards the end of the route, before a final position, a reduction in car speed.

On the other hand you can further improve the harmonic movement of the car with a braking unit, which during a stretch the car brakes in the direction of removal before that he adopts his final position. You can get one Especially smooth transition of the car to its final position. With the braking unit you can also avoid a closure or a unwanted car insertion.

In another configuration it is proposed that the car, to from at least one point in the direction of extraction, decoupling the spring device, with which the carriage can be remove completely without much effort, for example, for cleaning of said car, etc.

The solution according to the invention can be use in different home appliances than the specialist consider appropriate, such as in a dishwasher, etc., in particular, however, in kitchen ovens whose door it can be closed advantageously and with total security by corresponding spring device, and open comfortably along with a car

Other advantages are deduced from the following description, with the help of illustrations. In the drawings represent embodiments of the invention. The drawing, the description and the claims contain numerous features in combination. The specialist will identify convenient way each of the individual characteristics, bringing them together in other logical combinations.

The figures show:

Figure 1 a represented kitchen oven schematically, in a side view with a partial section,

Figure 2 an oven spring device Figure 1, seen obliquely from above, in a position corresponding to a car removed,

Figure 3 the spring device of the Figure 2 in a plan view, in a position corresponding to the car removed,

Figure 4 a section along the line IV-IV in Figure 3,

Figure 5 a section V of figure 2 from in front, with an actuator in a locked position,

Figure 6 section V with the actuator in a unlock position,

Figure 7 a schematic representation of a alternative spring device to that of figure 2, shortly before adopt a position corresponding to an insert car,

Figure 8 the spring device of the Figure 7 in a position corresponding to an insert carriage.

Figure 1 shows a kitchen oven schematically represented, in a side view with a section partial. The kitchen oven has an oven muffle 10, open in address to the front side of the kitchen oven and limited by a flange 84 of the muffle. On the other hand, the kitchen oven has a carriage 11, which holds a kitchen oven door 12 and is designed so that it can move with said door. At the door of the holding oven 12 retaining elements 31 are held in which can be hung on supports 32 of the cooked product. He Kitchen cart 11 has two displacement trains 33, 85 (Figures 1 and 3) that run horizontally and are joined rigidly to the oven door 12. Each train of displacement 33, 85 penetrates a displacement rail 34, fixed to the housing and arranged below the muffle of the kitchen oven 10, and moves on said rail horizontally by means of some guide rollers For this, each displacement train 33, 85 has a guide cylinder 35 while on each track rail 34 a stationary support roller 36 is provided.

In its closed position the oven door of cooker 12 is subjected to the loading of a closing force through of a spring unit 18 of a spring device 13 (fig. 3). The first spring unit 18 counts in the rear area e bottom of the kitchen oven with a horizontal guide duct 37, which runs transversely to the direction of movement of the car 11 and which serves as a guide for the displacement of a linkage 38 (figures 1, 2 and 3). In linkage 38 it is fastened, on the sides and out, a spring seat 39, 40. In the spring seat 39, 40 a compression coil spring 41, 42 is supported, which acts laterally, outward, on a slide 43, 44 which is conducted in the guide duct 37 and protrudes with its end of the guide duct 37. At the end of the slide 43, 44 protruding outwards is housed in a rotating position a roller 45, 46 which, in the closed position of the oven door of kitchen 12, or in the inserted situation of car 11, interacts with a curved rail 47, 48 configured in the displacement train 33, 85, and thus load the carriage 11 in its insertion direction 16 and generates an incident closing force on the oven door Cooking 12.

The linkage 38 is attached, between the slides 43, 44, in a recess 49 of the guide duct 37 and by means of levers rotating 50, 51, to an electromagnetic actuator 21 of a unit of activation 20 (Figures 2, 3 and 5). Through a sheet of lift 79 the actuator 21 is held, in the situation of mounting, to a wall of the kitchen oven housing not represented in greater detail.

In the insertion situation the carriage 11 is under load, with a force, in its extraction direction to through a second spring unit 19 of the device spring 13. The second spring unit 19 is arranged in the back and bottom of the kitchen oven and has a mechanism of levers 22, with levers 23, 24, 25, 26 joined together through articulation that basically form a rhombus, where a first diagonal 27 of the rhombus runs parallel to the direction of extraction 15, and in a second diagonal 28 of the rhombus, which runs perpendicular to the extraction direction 15, a traction spring 29 that compresses levers 23, 24, 25, 26.

The rear levers 23, 26 are housed through joints on the side opposite car 11, in a floor plate 53 which also forms a rear wall 54 in which the guide conduit 37 of the first spring unit is held 18. On the side opposite carriage 11 the rear levers 23, 26 they are joined by articulation, through a piece of sheet metal 55, 56 in the form of T, to the previous levers 24, 25. In the T-shaped pieces 55, 56, the tension spring 29 is hooked in holes 57, 58. The previous levers 24, 25 are housed by a joint, on its directed side towards car 11, to a slide 59 driven, through two guide bolts formed by screws 60, 61, in two slots guide 62, 63 along the first diagonal 27. The slide 59 It is formed by a piece of sheet metal and is driven on a plate of the T-shaped plastic floor 64, which is held on a sheet floor 65. Instead of with sheet the slide could be also made of plastic, and conducted directly on a plate floor plate. In the direction of car 11 the slide 59 it has an angled area 66, which forms a contact surface 67 for car 11.

If you intend to open the oven muffle 10 and remove the carriage 11, an operator activates an activation button 52 of the activation unit 20 (figure 1). Actuator 21 is activated, and a pusher 86 of the actuator 21 is introduced so electromagnetic (figure 6). Levers 50, 51 experience a turn, and the spring seats 39, 40 are displaced in the guide conduit 37 in the direction of the actuator 21, whereby distend helical compression springs 41, 42 and se reduces the closing force generated by the first unit of spring 18, so that carriage 11 can be driven by the second spring unit 19. Actuator 21 is addressed with a short pulse, which saves current, and returns to its position of starting once car 11, with its curved rails 47, 48, or once an apex of an arch, which looks inwards, of the curved rails 47, 48 has passed rollers 45, 46. However, it should also be thought that the activation unit 20 maintains the helical compression springs 41, 42 in their position of stretching, until car 11, after its introduction, has passed with the apexes of the curved rails 47, 48 the rollers 45, 46.

The car 11 can also be removed without activating the activation button 52. Here the slides 43, 44 deviate by the action of curved rails 47, 48, against the force elastic compression helical springs 41, 42.

The second spring unit 19 acts on the car 11, from the insertion situation of car 11, only in the first part of the total route in the direction of extraction 15, and specifically on a crossbar 68 of the carriage 11 attached to the displacement trains 33, 85 (figure 3). One time that car 11 has exceeded approximately half of its total travel in the direction of extraction 15, the slide 59 of the second spring unit 19 presses with the screws 60, 61 on the end of the guide grooves 62, 63 (Figure 2), and the carriage 11 is disengaged, in the extraction direction 15, of the second spring unit 19 or spring device 13 in its set and continues to move in the direction of extraction 15 by effect of its kinetic energy.

Shortly before its final position the car 11 makes butt with its crossbar 68 against a brake shoe 69, 70 of a 30 spring loaded braking unit, and undergoes braking smooth during a defined path (figure 3). The shoes of brake 69, 70 are formed by plastic tabs that are couple, with a leading end provided with a molded hook 71, on a shoulder 72 of a lower plastic tongue 73 attached to the sheet metal floor 65 (figure 4). At one rear end the shoes of brake 69, 70 are engaged by a hitch joint 74, 75 in the lower plastic tabs 73, and housed in swivel position by hitch joint 74, 75. Between the brake shoe 69, 70 and the lower plastic tongue 73 se it has a helical compression spring 76, by which effect the brake shoes 69, 70 have a spring load towards above, in the direction of the car 11.

When the carriage 11 is introduced, it is pushed by a user and its cross member 68 moves away from the brake shoes 69, 70. Then the crossbar 68 presses with the surface of contact 67 of the slide 59, and the second spring unit 19 it is pressed during the subsequent introduction of car 11. By effect of the lever arms acting on the mechanism of lever 22, and which are modified during movement, the force of the second spring unit 19 acting in the direction of extraction 15 decreases as carriage 11 progresses in the introduction address 16. Between the rear levers and the previous 23, 24, 25, 26 an acute angle is formed, and the traction spring 29 acts basically in the direction longitudinal levers 23, 24, 25, 26.

The carriage 11 can be inserted comfortably, and The kitchen oven flask 10 can be closed safely, together with the oven door 12, with a small force of closing exerted through the spring unit 18. The carriage 11 Get in touch, at the end of your tour in the direction of extraction 16, with its curved rails 47, 48, with rollers 45, 46 of the first spring unit 18, and the slides 43, 44 of the first spring unit 18 is inserted into the guide conduit 37 against the spring force of the coil springs compression 41, 42, specifically until, seen from the side of the rollers 45, 46, an elevation 80, 81 of the curved rails 47, 48, rollers 45, 46 rest on a slope 82, 83 of curved rails 47, 48, and until the helical compression springs 41, 42, through the slides 43, 44, of rollers 45, 46 and of unevenness 82, 83 of curved rails 47, 48, generate a closing force.

The spring device 13, that is, the spring units 18, 19 and the braking unit 30, is realized as a module that can be assembled and disassembled as a Unit in the kitchen oven.

Figures 7 and 8 represent schematically an alternative spring device 14, provided of a bistable spring unit 17. The equivalent components in substance they are basically indicated with the same numbers of reference. In addition, in relation to the characteristics and functions that remain unchanged, you can refer to the description of the exemplary embodiment of figures 1 and 6. The following description is substantially limited to differences in respect of the exemplary embodiment of figures 1 to 6.

The spring unit 17 has a mechanism of levers 22 with levers 23, 24, 25, 26 joined together through an articulation that basically forms a rhombus, where a first diagonal 27 of the rhombus runs parallel to the direction extraction 15, and in a second diagonal 28 of the rhombus, which runs perpendicular to the extraction direction 15, it holds a tension spring 29 that compresses the levers 23, 24, 25, 26.

In contrast to the second unit of spring 19, the spring unit 17 generates, in addition to a force on a carriage 11 in the direction of extraction 15, a force of closing. The spring unit 17 is solidly attached to the carriage 11 with a previous 77 support point in the extraction situation of the carriage 11, and in the carriage insertion situation 11 the point of support 77 moves to be behind a support point 78 to through which the lever mechanism 22 is attached to a piece of kitchen oven housing, so that the traction spring 29 acts on the carriage 11 in the insertion direction 16 through the  lever mechanism 22 and generates a closing force.

Reference numbers

10

     Kitchen oven muffle

eleven

    Car

12

    Kitchen oven door

13

    Spring device

14

    Spring device

fifteen

    Extraction Direction

16

    Insertion Address / Closing Address

17

    Spring unit

18

    Spring unit

19

    Spring unit

twenty

    Activation unit

twenty-one

    Actuator

22

    Lever Mechanism

2. 3

    Lever

24

    Lever

25

    Lever

26

    Lever

27

    Diagonal

28

    Diagonal

29

    Traction spring

30

    Braking unit

31

    Retention element

32

    Cooked product support

33

    Scroll train

3. 4

    Track rail

35

    Guide cylinder

36

    Support roller

37

    Guide duct

38

    Linkage

39

    Spring seat

40

    Spring seat

41

    Compression coil spring

42

    Compression coil spring

43

    Slide

44

    Slide

Four. Five

    Roller

46

    Roller

47

    Curved rail

48

    Curved rail

49

    Rebate

fifty

    Lever

51

    Lever

52

    Activation button

53

    Floor plate

54

    Back wall

55

    Sheet metal part

56

    Sheet metal part

57

    Drilling

58

    Drilling

59

    Slide

60

    Screw

61

    Screw

62

    Guide slot

63

    Guide slot

64

    Plastic floor plate

65

    Sheet metal floor

66

    Zone

67

    Contact surface

68

    Crossbar

69

    Brake shoe

70

    Brake shoe

71

    Hook

72

    Highlight

73

    Plastic tongue

74

    Hitch union

75

    Hitch union

76

    Compression coil spring

77

    Support point

78

    Support point

79

    Lift plate

80

    Elevation

81

    Elevation

82

    Slope

83

    Slope

84

    Flange Flange

85

    Scroll train

86

    Pusher

Claims (11)

1. Home appliance, in particular a kitchen oven, with a carriage (11) and a door (12), as well as a spring device (13, 14), whose carriage (11) can be removed driven by the force of the spring device (13, 14), which in the situation of insertion of the carriage (11) acts on the carriage (11) in the extraction direction (15) with a force less than in an extraction situation, at least partial, of the carriage (11), characterized in that the force acting in the extraction direction (15) is reduced in the carriage insertion situation (11) by the action of a lever mechanism (22). 2. Home appliance according to claim 1, characterized in that the lever mechanism (22) has levers (23, 24, 25, 26) joined together by means of joints forming basically a quadrilateral, where a first diagonal (27) of the quadrilateral runs parallel to the direction of extraction (15), and in a second diagonal (28) of the quadrilateral, which runs perpendicular to the direction of extraction (15), a tension spring (29) is placed that compresses the levers (23 , 24, 25, 26). 3. Home appliance according to one of the preceding claims, characterized in that the door (12), in its closed position, is loaded with a closing force by the action of the spring device (13, 14). 4. Home appliance according to claim 3, characterized in that the spring device (14) has at least one bistable spring unit (17). 5. Home appliance according to claim 3 or 4, characterized in that the spring device (13) has at least one first spring unit (18) acting in the closing direction (16) of the door (12) and a second spring unit (19) acting in the direction of removal (15) of the carriage (11). 6. Home appliance according to claim 5, characterized in that the closing force of the first spring unit (18) can be at least reduced through an activation unit (20) for opening the door (12). 7. Home appliance according to claim 7, characterized in that the activation unit (20) has at least one actuator (21). 8. Household appliance according to one of the preceding claims, characterized in that the door (12) is attached to the carriage (11) and is housed with it in a movable position. 9. Household appliance according to one of the preceding claims, characterized in that the spring device (13), starting from the carriage insertion situation (11), acts on the carriage (11) only in a first part of the total travel with the force in the direction of extraction
(fifteen). 10. Household appliance according to one of the preceding claims, characterized in that the carriage (11) is braked during a section in the extraction direction (15) with a braking unit (30), before adopting its final position. 11. Home appliance according to one of the preceding claims, characterized in that the carriage (11), from at least one point in the removal direction (15), is disengaged from the spring device (13, 14).