DE2154748C2 - Electric oven toaster - Google Patents

Description

The invention relates to an electric oven toaster according to the preamble of claim 1. Such an oven toaster is from the US 3119000 known.

Electric oven toasters are used for toasting bread or for gratinating sandwiches, pies, frozen pizzas, TV dishes, etc. Such Household appliances must, on the one hand, be simply stable and securely built and, on the other hand, be inexpensive to manufacture can.

From US 3169 469 a bread slice toaster is known, in which individual sheet metal parts are connected by slots and tongues engaging in them. Included but have to throw so many individual parts assembled in successive production steps that efficient production and se ice-friendly repair work are not possible.

The invention is based on the object of designing an electric oven toaster in such a way that it In can throw as few work aisles as possible quickly assembled.

This task throws through the In claim 1 marked features solved.

Advantageous embodiments of the invention are in characterized the subclaims.

The advantages that can be achieved with the invention exist in particular that the side walls and the components to be arranged between them, such as heating elements, reflectors and front door, are merely plugged together to form a self-supporting chassis. Despite With these connectors, the front door can be removed for cleaning or maintenance purposes without the entire chassis having to be dismantled.

The invention will now be based on the following Description and the drawing of an Ausfühmngsheisptels explained in more detail.

Flg. 1 is a perspective view of an electric oven toaster according to the described embodiment of the invention.

FIG. 2 is a perspective part illustration of FIG lower left front page, with some parts broken open to show details of a coaiift joint for the front door of the oven toaster.

Flg. 3 shows this in a perspective view Dfehsiiftgefcuk ^ d shown in Fig. 2 the fastening element.

F i g. 41st a perspective image of the In F1 g. 1 oven toasters shown.

FIG. 5 is a cross-sectional view of the electric oven toaster on level 5-5 in FIG

Fig. 6 is an exploded perspective view of the lower one Heating element arrangement of the oven toaster shown in FIG Construction details broken up and all parts shown in their unsupported positions.

Fig. 7 is a perspective partial representation of the right front, shown partially broken away for details of the right swivel assembly for the front door of the oven toaster shown in FIG. 1.

Flg. 8 is a cross-sectional view of one of the Insulators for holding one of the upper heating elements of the electric toaster shown in FIG.

FIG. 9 is a schematic representation of FIG. S and shows the reflection system of the oven toaster.

In Flg. 1 is shown an electric oven toaster which has a toast or oven chamber 2, In which an Im general horizontal support grid 4 for holding the food to be cooked or toasted Bread attached 1st. The oven toaster includes a generally horizontal top wall 8, generally parallel vertical side walls 10 and 11 and a front opening 14 that provides access to the interior of the Toasting oven. A front door 16, which is pivotably attached to its lower portion IS, is used for Closing the front opening. In Flg. 1 If the door 16 In its generally horizontal, full openest! - development shown. It should be noted that the front wall 20 of the toaster runs slightly obliquely, so that the front door 16 is in a somewhat backward sloping vertical position when it is completely closed (st. On this Way is the upper door section slightly behind the lower door section.

The basic components of the oven toaster are now based on Flg. 4 and 5 explained. The toaster includes two inner rare plates 22 and 24 made of sheet metal, upper jacketed electrical heating elements 26 and 28, an upper reflector 30, below reflectors 3i: andIs33, lower heating elements 32 and 34 and a lower baffle 36 which is provided with slots.

The two side plates!] 22 and 24 are made of sheet metal and, like the upper reflector 30, are the same as above Ren heating elements 26 and 28, the lower reflectors 31 and 33, the lower heating elements 32 and 34, the baffle plate 36 and the front door 16 are all connected to one another, without using separate fasteners.

As in particular from Flg. 4 emerge are the two Rare plates 22 and 24 are provided with numerous slots and holes to accommodate these syrup components. There are upper slots 40 in the left side panel 22 and In the elongated selenium plate 24 are upper screws 42 formed for receiving connecting tongues 46 and 48, respectively, which are formed on opposite sides of the upper reflector 30 in one piece with this. in the Spaced and generally circular Openings 50 and 52 are in the left side panel; 22nd and generally circular openings 54 and 56 are provided in the right rare plate 24 to accommodate the upper sheathed heating elements 26 and 28 together with their ceramic insulators 60, 62, 64 and 66 to accommodate.

It can also be seen that a lower rear slot 68 is formed in the left side plate 22 and a lower rear slot 72 is formed in the right side plate 24 for receiving tongues 76 and 78 which are integral with the lower rear reflector 2 are formed. Furthermore, are in the Seitenwä: the 22 or 24 openings 94 and 96 formed into which the lower encased heating elements 32 and 34 together with their ceramic insulators 75 and the guide plate 36 Betrlebsfef 5g can be used. The front door 16 Is provided with pivot pins 104 and 106 and the rare plates 22 and 24 have suitable openings 108 and 110 to accommodate these pivot pins. With this arrangement of the parts it is made clear that all components mentioned are ready for use in one operation can be assembled by simply holding the reflectors, the heating elements, the door and its pivot pins next to the corresponding slots and holes and then the rare plates are moved towards each thereby the tongues Drehge Insert steering pins and the ceramic insulators and the ends of the sheathed heating elements into the corresponding slots and holes in the rare plates 22 and 2a , and then keep the side plates spaced apart. This can be achieved by den that those on the upper reflector and the lower Reflector trained tongues are bent or turned over. In addition, a lower front panel 18 can be connected to the rare plates 22 and 24 by screws or other fastening means in order to secure the To hold side panels in their assembled position. The insulators 60, 62, 64, 66 and 75 are with respect to the jacketed heating elements and the side plates 22 and 24 shaped and arranged to support the heating elements 26, 28, 32 and 34 on the rare plates and isolate the heating elements from the rare plates without any separate attachment means be used. The reflectors 30, 31 and 33 and the side plates 22 and 24 form a unitary structure, the insulators and the heating elements In

eo their situation holds.

As in particular in the lower section of Flg. 6, each of the elongated jacketed heating elements 26, 28, 32 and 34 have two electrically conductive pins 51 and 53, which are made of opposite

Ends of a M ^ taliümmmantelung 55 hcraüsragep, which the heating element 57 surrounds. Usually there is one between the heating element 57 and the jacket 55 suitable insulation 59 for insulating the heating element

and the pole pins opposite the metal jacket 55 intended. The insulation 59 is compressed a little at the ends of the sheath to form a smooth, generally curved insulating surface between the ends of the jacket 55 and the pole pins 51 and 53 to form.

The four insulators 60, 62, 64 and 66 for the upper heating elements are preferably made of a ceramic material and are generally cylindrical in shape. Wle'In Flg. 8, they have an enlarged cylindrical outer wall 61, a smaller cylindrical outer wall 63 for insertion into one of the openings 50, 52, 54 and 56 formed in the rare plates, and a generally curved outer wall 65 which wall the enlarged cylindrical outer J5 61 connects to the smaller cylindrical outer wall 63. The curved wall 65 is supported on the inner surface of the side plate in the vicinity of the openings 50, 52, 54 or 56. In which it is used. As in Flg. 8, each of the generally cylindrical insulators 60, 62, 64 and 66 has an enlarged internal bore 67 for receiving the outer cylindrical face of a jacket 55 of one of the heating elements and a smaller cylindrical bore 69 which supports the pole pin 53 of FIG the heating element over which the isolator is arranged. An inclined inner wall 71 connects the enlarged bore 57 with the smaller bore 69 and serves as a seat for the end of the casing 55 and the compressed insulation 59 at the end of the casing.

As in particular in the Flg. 4 and 6 is shown, For example, the lower heating elements 32 and 34 are stacked and there is a pair of exceptionally shaped ones Insulators 75 are provided which hold the heating elements 32 and 34 together with their baffle 36. the Insulators 75 are in the shape of a generally rectangular block and are scaled down with two cylindrical outer surfaces 77 which are received by one of the two enlarged openings 94 or 96 which are hidden in the strange plates 22 and 24. The ceramic insulators 75 for holding the Lower heating elements 32 and 34 have smaller and larger internal bores 100 and 102, which are generally similar to the inner bores 67 and 69 of the cylindrical Are insulators 60, 62, 64 and 66 and which receive the protruding ends of the upper heating elements.

The lower ceramic insulators 75 also support the baffle 36 of the heating element. As in particular from Flg. 6, an upwardly protruding shoulder 83 is formed on each of the ceramic insulators 75 and accommodates counter slots 85 formed in the end portion of the guide plate 36. With this arrangement, the baffle 36 can be attached to the top of the lower insulators by the protruding lug 83 protruding through the slots 85 and, as in particular in FIG. 6, tabs 87 formed on the downwardly extending walls of the baffle can be crimped over the end of a generally horizontal top wall 89 of the insulators. The ω lower heating elements 32 and 34 together with their insulators and the baffle 36 can be preassembled to be inserted as a unit into the holes 94 and H formed in the side plates 22 and 24, respectively. For this purpose, as in particular in the Flg. 4 and 5, a suitable bracket 91 can be used to connect the central sections of the heating elements together so that the lower heating element assembly can be operatively brought into its proper position with respect to the side panels, reflectors and other toaster elements.

With this arrangement it is made clear that the insulators hold the heating elements on the electric toasting oven very securely and effectively without the use of any additional connecting devices. In addition, the one-piece upstanding lug 83 is provided on the lower insulators to support and secure the baffle 36. Thus, an inexpensive construction with a minimum number of parts is achieved.

The upper reflector 30 is provided with numerous generally flat heat reflective surfaces provided, and the jacketed heating elements 26 and 28 are uniquely placed with respect to these heat reflective surfaces to absorb the heat from the heating elements with a substantially uniform intensity reflect down on the entire grating surface. V / le in particular in the Flg. 4 and 5, contains the top reflector 30 has a generally flat horizontal ash 39 at the rear of the reflector, a generally flat portion 41 which extends forwardly and with respect to the reflector portion 39 runs upwards at an angle, a larger one. Generally horizontal reflector section 43, the extends forward from section 41, generally a flat reflector section running downwards 45, which extends from the reflector section 43 to the front. extends, and a relatively short one, in general horizontal reflector section 47, which extends from the reflector section 45 running downwards front extends. The upper ones in front and in the back Heating elements 26 and 28 are in relation to each other and to the reflective surfaces of the upper reflector exceptionally well arranged for a uniform reflection of the radiated from the heating elements Heat towards the food to be cooked below on the support grid 4.

The heating elements and the reflective surfaces are specially arranged with respect to one another so that the heat emerging from the heating elements is evenly distributed over the toast surface. Obviously, if such a condition fails, a toasted slice of bread in the area would turn darker. In which the heat information from the reflection of both heating elements can be concentrated on the same surface. In order to ensure concentrated reflection on the same surface and to ensure a very even distribution of the reflected heat, the apex of the angle or line 49 is formed by the connection of the upper horizontal reflector section 43 and the upwardly vedac'jenden rear reflector section 41 Is arranged in front of a heating element 28. With this construction, the heat reflected by the reflector 41 passes from the rear portion of the toast rack to a front portion of the toast rack, and further, the heat reflected by the upper horizontal reflector 43 is also directed to the front portion of the toast rack. The heat of the heating element 26, which take reflected by the reflector 43, take directed from the front of the Täslgcrg i ZAM iucJcwSriigen portion of the toast grating, wherein the largest Wärmelniensltät the front portion of Toastgltteis is the reflekUerte by the reflector 45 Wirme extends VOA the front of the Taost grid to the middle section of the toast grid. This arrangement combines the reflected heat with that from the Helzele-

Use directly radiated heat to ensure that the heat is evenly distributed over the toast rack.

The two lower jacketed heating elements 32 and 34 are superbly positioned with respect to one another and into an unusually shaped and slotted baffle 36 to just provide the void distribution of convection heat flows from the heating elements upward to the toasted bread slices or cooked food. As in particular in the Flg. 6 and 9 , the heating elements 32 and 34 are generally arranged vertically to one another and the baffle plate 36 is attached above the upper heating element 32 '. The baffle 36 has a generally horizontally extending wall 79 and 7 * el downwardly extending vertical warp. * .e 80 and 81 on. In the upper horizontal surface 79 of the baffle, numerous longitudinally angeord designated slots 82 are formed. With this construction, certain convection currents, along with some small amount of radiant heat, can flow through the slots 82 formed in the upper surface 79 of the baffle 36.

From the above description as well as the reflections and the convection heat flow, which in Fig. 9 are shown, it is clear that the heat curve in the toaster just the right amount of heat appears evenly on both sides of the toasting rack 4 in order to toast bread slices evenly Cooking other food evenly that can be placed on the toast rack. It also becomes clear that this is achieved using a minimum number of parts that are easily connected together become Irish. The radiant heat and the heat reflected from the upper heating elements 26 and 28 is uniformly fed to the toasting rack 4 by placing the upper reflector 30 in a suitable manner in the 4, 5 and 9 shape shown is bent. In addition, the heating elements 26 and 28 are easily in their Position it at the desired distance and angle from the various reflective sections of the reflector by simply making the holes 50, 52, 54 and 56 are placed in the correct positions in the rare plates 22 and 24 made of sheet metal. Thus, an extremely simple and yet effective and reliable heating arrangement was created, the Suitable for cooking pieces the size of frozen TV dinners.

In the following, the reliable and cheap front door construction for an oven toaster with a minimum number of parts described that are fully assembled and that can also be easily dismantled from the oven toaster without other parts removed as door parts.

As in the Flg. 2, 3, 5 and 7 belong to The basic components of the front door include an inner panel 150 made of sheet metal, an outer panel 152, a glass window 154, a handle 156 and pivot pins 104 and 106. The parts are specially designed and arranged so that the glass window 154 can be removed and replaced without any disassembly must be done on the toaster itself. As can be seen from the figures, both the

Kspassefe ISS sis looking for the AaSeapaseek 152 ass

Made of sheet metal and have enlarged openings 162 and 164, respectively. Along the outer circumference of both Panels are raised flanges 166 and 1 (Figure 8 and so are raised flanges 178 and 172 formed around the perimeter of the enlarged openings 162 and 164 of the panels, respectively As can be seen, the door is of sufficient thickness to accommodate the glass window 154 and two fasteners 174 and 176 for the pivot pins.

As in particular in the FIg. 2, 3 and 7 1st shown, the fasteners 174 and 176 (It ₁ are formed such that they perform numerous functions. The left-hand fixing member 176 is constructed so that a pivot pin 180 easily from the fastener and the door assembly can be removed to remove the door components from the oven toaster, without dismantling any other components of the oven toaster.As shown in Fig. 3, if the left fastening element 176 has a generally includes my flat wall portion 182 which can be used to securely attach the fastener to the inner panel 150 by a rivet 184 or other fasteners. Furthermore, the fastening element has outwardly protruding flange sections 186, 188, 190 and 192. The flange sections 185 and 188 are used to provide two bearing openings 194 and 196 aligned with a suitable slot 198 made in the outer peripheral flange of the inner panels around the

Take up pivot pin 180.

The raised flange 192 is provided as a stop against which a horizontal forearm 200 of the generally U-shaped pivot pin 180 rests to an axial sliding movement of the pin 180 from the öff openings 194 and 6, which are in the flanges of the fastening transmission element are formed and from the opening 108 out to prevent the In the rare plate of the Oven Toasters Is Made. From Fig. 3 it is clear that the toad pivot pin in the generally has one U-shape and two in general parallel arms 202 and 204, a forearm 200 and a short arm 206 which is generally arranged perpendicular to the plane of the other arms 1st. The arm 206 is slightly smaller than the thickness of the front door, to trap the pivot pin between the front door panels without rattling. The left pivot pin 180 is initially inside the front door in the in Flg. 2 and the complete door is built into the rare plates 22 and 24 by the long arm 202 of the pivot pin is inserted into opening 108 in the side panel 22 of the Jfenloaster is located

As can be seen from Fig. 7, the right fastener 174 for the pivot pin is generally similar. borrowed like the left fastener. However, it should it is not intended to use a removable pivot pin, a rigid pivot pin 106 In suitable catfish riveted to the upwardly extending arm 210 of the right fastening element the.

Both fasteners 174 and 176 face generally flat flange portions 7.10 and 212, respectively Holding the glass window 154 between the outer and inner panels. As from the Flg. 2, 5 and 7 is borrowed, these flanges act with an inwardly curved tongue 163, which on the outer panel 152 made of avhiiApt Ut ^ together to the effect that they limit a vertical up and down movement of the glass window 154. Upwardly extending flange portions 219 and 190 are formed from a stick with the fastening elements 174 and 176, respectively, in order to limit movement of the glass wall 154 to the right and to the "left". These limitations are shown in FIGS

2302 * 1/26

These flange arms 219 and 190 of the fasteners 174 and 176 also have the additional function, members 232 and 230 for controlling the taring operation to be swiveled.

With this arrangement of the parts it is clear that the Door can be made operable by simply removing fasteners 174 and 176 for the Pivot pins riveted to the inner panel of the door, the pivot pin 104 in the In Flg. 2 position shown used and the glass window 154 disposed between the flanges 219, IW, 210 and 212 of the fasteners will.

So that the toasting oven has a tasteful appearance. As shown in Figure 1, this is the exterior panel 152 made slightly larger than the inner panels 150, see above that the peripheral flanges 166 of the inner panels are inside the peripheral flanges 168 of the outer panels 152 are arranged.

As can be seen from FIGS. 1 and 5, are in the Outer panels larger openings 250 and holes 254 formed in the inner panels, the inwardly protruding Approaches 260 accommodate that with the door handle from a Piece can be formed. Thus, the door handle 156 and the interior and exterior panels 150 and 152 be securely attached to each other by simply placing the Lugs 260 of the door handle pushed through the enlarged openings 250 of the outer panels and screws 252 or other suitable fastening means through the holes 254 of the interior panels and into the openings 264 can be used, which can be formed in the projections 260. As a result, the finished door is divided by two Screws 252 held together.

If, for whatever reason, the door is to be removed from the oven toaster, it is only necessary to to open the door as shown in Flg. 1, unscrewing the screws 252 securing the interior panels of FIG to fold away the front or outer panels 152, to remove the glass plate 154, the upper arm ISO of the left The hinge pin and rotate the pin around the long arm 20i forwards until the Forearm 200 of the pin behind the stop 192 is removed. Then the left pivot pin can be pulled to the right to pull the long arm 202 out of openings 108 in the side panel and openings 194 and 196 of the Pull out fasteners. The links 230

to and 232 can then be transferred by a mechanism 234 to Operation of the door by simply moving the ends of links 230 and 232 inward, around the bearing holes 231 and 233 of the links of actuating pins 235 of the mechanism 234 for the

ts push the door down. Then the left portion of the inner panels is pivoted a little forward and to the left in order to remove the rigid pivot pin 106 from the opening UO which is formed in the right rare plate 24. Of course, the reverse procedure can be used if the front door is to be inserted again in the oven toaster.

With this arrangement of the parts it is clear that After the initial production, the oven door is fully assembled as a prefabricated part and then at the same tent can be connected to the rare plates 22 and 24, to which the heating elements and reflectors In the rare plates to be built in. It can also be seen that after the toaster production is complete, the oven door is removed from the The toaster can be removed and reinserted back into the toaster by simply pulling the two Screws 252 are removed and the door parts are separated without the side panels 22 and 24 or other basic components of the electric oven toaster be disturbed. Thus, it is an extremely simple and excellent door construction with a minimum number has been achieved by parts.

For this purpose 4 sheets of drawings

Claims (7)

Patent claims: 1. Electric oven toaster with a sheet metal housing, an essentially horizontal bracket for the food to be cooked, a hinged front door with a glass window and an upper door Heating element Inside the sheet metal housing, Dorch has the following features: - the two rare walls (22, 24} are each provided with several slots (40, 42) on their upper edge, slightly below the slots (40, 42) with an opening (50, 54), on the front edge below with an opening (108, 110) and slits (68, 72) on the rear lower edge, - An upper cover wall (30) arranged between the rare walls (22, 24) has tongues (46, 48) on its side edges, JIe into the upper ones Slots (40, 42) of the side walls (22, 24) engage, - on the bare conductor ends (51, 53) of the upper sheathed * · »! The heating element (26, 28) are insulators (60, S1, 64, 66) which have a first, smaller diameter section (63), which is inserted into the upper opening (50, £ 4) of the rare walls (22, 24) fitted and provided with an inner bore (69) receiving the conductor ends (51, 53), and comprising a second, larger diameter section (61) which is provided with an inner bore (67) receiving the jacket of the heating element (26, 28) is provided, wherein at the transition from the first section (63) to the second section (61) an outer shoulder (65) is formed, the g, «en d>. Side walls (22, 24) rests, - the front door (16) is at your ucier corners with Pivot pins (104, 106) are provided, which are inserted into the Openings (108, 110) fit into the front edge of the rare walls (22, 24), - A lower component (31) has tongues (76) on its side edges, which into the lower Engage contactors (68, 72) of the rare walls (22, 24). 2. Oven toaster according to claim 1, characterized in that « draws that two lower jacketed electrical heating elements (32, 34) provided with insulators (75) are in openings (94, 96) in the lower section the rare plates (22, 24) are used. 3. Oven toaster according to claim 2, characterized in that over the lower heating elements (32, 34} a baffle (36) provided with holes is arranged, which at each end tongues (87) for Has connection with the z.wel insulators (75). 4. Oven toaster according to claim 1, characterized in that the upper cover wall (30) as a reflector is trained. the one generally horizontal, short rear reflector surface (39), a rear reflector surface (41) from the rear The reflector surface (39) runs forwards and upwards, a middle, generally horizontal reflector surface (43) which runs forwards from the upwardly projecting reflector surface (41), one downwards protruding reflector surface (45), which runs from the central reflector surface (43) downwards, and one in it general horizontal reflector surface (47), which extends from the reflector surface (45) running downwards to the front, weave! the horizontal Reflector surfaces (39, 43, 47) are provided with tongues (46, 48). 5. Electric oven toaster according to claim 1, characterized in that the front door which is pivotably attached between the side plates (22, 241) (£ 6) has an inner wall (150) and an outer wall (152) connected thereto, between which the two Pivot pins (104, 106) and a stop (192) are attached through which axial movement of the However, pivot pins (1164, 106) with assembled inner and outer walls (150, 152) prevent '' with separate inner and outer walls from their Openings (108, 110) in the side walls (22, 24) without dismantling them is possible. 6. Oven toaster nacr, claim 5, characterized in that on the inner wall (150) of the flap door (16) a fastening element (174, 176) with an outwardly protruding flange (192) as a stop for Bracket attached to the pivot pin (IM, 106) forming removable pivot pin (180} Is. 7. Oven toaster according to claim 6, characterized in that the removable pivot pin (180) is U-shaped and one arm (202) is U-shaped is longer than the other arm (204), the end of the longer arm (202) Ie the opening (108) in the side plate (22) can be inserted and the stop (192) is on engages the generally horizontal lower part (200) of the U-shaped rotary joint member (180) and thus the longer arm (202) of the U-shaped pivot pin (180) is held in the opening (180) when the Inner and outer panels (150,152) of the door are held together, but the U-shaped pivot pin is rotatable around its long arm (202) to remove the lower arm (200) from its stop position, so that the pivot pin (180) Can be removed quickly when the inner and outer panels (150, 152) of the door (16) are separated from one another are.