Heating cooker

Abstract

To provide a heater mounting structure of a heating cooker capable of preventing breakage of a heater.SOLUTION: A heater 6 is inserted in a heater mounting hole 25 of a heater fixing member 24, the heater 6 is rotated by a predetermined angle, an engagement part 12 of the heater 6 is brought into contact with a portion which is an outside surface of the heater fixing member 24 and in which a circular arc part 26 is formed, the engagement part 12 is engaged with a receiving part 34 of a rotation-stop member 33, and the rotation-stop member 33 is fixed to a right side plate 8; thereby, the rotation of the heater 6 is restricted. Thereby, no load is applied to a lead part 13 provided at an end part of the heater 6, so the breakage of the heater 6 can be prevented.SELECTED DRAWING: Figure 11

Description

[Technical Field]

[0001] The present invention relates to the installation of a heater in a cooking appliance such as a toaster oven. [Background technology]

[0002] Conventionally, there has been known a toaster oven in which insulators that hold both ends of a heater are attached to both side plates (corresponding to side plate portions of the present invention) that form both side walls of a cooking chamber (corresponding to the heating chamber of the present invention) and have insulator through holes (corresponding to the heater mounting holes of the present invention), and the heater is disposed in the cooking chamber with the insulators held in the insulator through holes of the side plates (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 3182499 Publication Summary of the Invention [Problem to be solved by the invention]

[0004] However, such toaster ovens have problems such as the complicated shapes of the insulators and the insulator through-holes, which make them difficult to process, difficulty in welding inside the insulators, and insufficient quality checks.

[0005] SUMMARY OF THE INVENTION An object of the present invention is to solve the above problems and to provide a cooking device in which a heater can be attached in a simpler shape, which can be more easily processed, and which allows the heater to be attached reliably. [Means for solving the problem]

[0006] The cooking device according to claim 1 of the present invention is a cooking device having a main body with a heating chamber inside and a heater with a cylindrical outer surface, the heater being attached between the left and right side plate portions of the heating chamber, wherein the end of the heater is provided with an engaging portion that is non-circular in cross section and protrudes outward from the outer surface of the heater, a lead portion is provided at the end of the heater, and a heater mounting hole is provided in the side plate portion, the heater mounting hole has an arc portion through which the heater can be inserted but the engaging portion cannot be inserted, and a notch through which the engaging portion can be inserted, the engaging portion is inserted into the heater mounting hole, the engaging portion engages with a receiving portion of a rotation prevention member, and the rotation prevention member is fixed to the side plate portion.

[0007] In addition, the heating cooker described in claim 2 of the present invention is the same as claim 1, in that the engaging portion is flat, and after the engaging portion is inserted into the heater mounting hole, when the heater is rotated a predetermined angle, the engaging portion abuts against the outer surface of the side plate portion near the arc portion of the heater mounting hole, and the engaging portion engages with the receiving portion.

[0008] Furthermore, the heating cooker according to claim 3 of the present invention is the same as claim 1 or claim 2, wherein the side plate portion is configured to have a side plate and a heater fixing member, and the heater mounting hole is provided in the heater fixing member.

[0009] Furthermore, the heating cooker described in claim 4 of the present invention is the same as claim 3, in which a plurality of protrusions are provided on the heater fixing member, a plurality of mounting holes are provided on the side plate, the protrusions are inserted into the mounting holes and bent, and the anti-rotation member is clamped between the bent protrusions and the side plate at least at one point and fixed to the side plate.

[0010] Further, a cooking device according to a fifth aspect of the present invention is the cooking device according to the fourth aspect, wherein the anti-rotation member is made of a metal wire. [Effects of the Invention]

[0011] By configuring the heating cooker described in the present invention as described above, the engagement portion of the heater and the receiving portion of the surrounding member are engaged to prevent the heater from rotating, and the wiring connected to the end of the heater is no longer subjected to stress due to rotation, thereby preventing damage to the end of the heater.

[0012] Furthermore, the engaging portion is flat, and after the engaging portion is inserted into the heater mounting hole, the heater is rotated a predetermined angle, and the engaging portion abuts against the outer surface of the side plate portion near the arc portion of the heater mounting hole, and the engaging portion engages with the receiving portion, thereby fixing the heater in the longitudinal direction, further reducing damage to the heater end portion.

[0013] Furthermore, since the side plate portion is configured to have a side plate and a heater fixing member, and the heater mounting hole is provided in the heater fixing member, heaters of various lengths can be accommodated, thereby increasing design freedom.

[0014] Furthermore, the heater fixing member is provided with a plurality of protrusions, the side plate is provided with a plurality of mounting holes, the protrusions are inserted into the mounting holes and bent, and the anti-rotation member is clamped at least at one point between the bent protrusions and the side plate, thereby reducing the number of parts required to fix the anti-rotation member and the total number of parts.

[0015] Furthermore, since the anti-rotation member is made of metal wire, no mold is required, and the anti-rotation member can be produced more inexpensively. [Brief explanation of the drawings]

[0016] [Figure 1] 1 is a perspective view of a cooking device showing an embodiment of the present invention. [Figure 2] FIG. [Figure 3] FIG. 2 is a cross-sectional view of a heating chamber of the cooking device according to the first embodiment. [Figure 4]1A is a perspective view of the heater, FIG. 1B is a plan view of the heater, and FIG. 1C is a front view of the heater. [Figure 5] FIG. [Figure 6] FIG. [Figure 7] 1A is a perspective view of the heater fixing member of the first embodiment, FIG. 1B is a plan view, FIG. 1C is a left side view, and FIG. 1D is a front view. [Figure 8] 1A and 1B are external views of the anti-rotation member of the first embodiment, in which FIG. [Figure 9] 10A and 10B are enlarged views of the essential parts of the cooking appliance with the heater fixing member attached to the right side plate, where FIG. 10A is a perspective view and FIG. [Figure 10] 10A and 10B are enlarged views of the main part of the cooking appliance with the heater attached to the right side panel and the anti-rotation member placed on the heater fixing member, where (a) is a perspective view and (b) is a view from the right side of the cooking appliance. [Figure 11] 10A and 10B are enlarged views of the main part of the cooking appliance with the anti-rotation member fixed to the right side plate, where FIG. 10A is a perspective view and FIG. [Figure 12] 10A and 10B are enlarged views of the main part of the cooking appliance with the heater fixing member attached to the left side plate, where (a) is a perspective view and (b) is a view from the left side of the cooking appliance. [Figure 13] 10A and 10B are enlarged views of the main part of the cooking device with a heater attached to the left side plate, where (a) is a perspective view and (b) is a view from the left side of the cooking device. DETAILED DESCRIPTION OF THE INVENTION

[0017] Hereinafter, embodiments of the present invention will be described with reference to Fig. 1 to Fig. 13. In the description of the embodiments, the lower left direction in Fig. 1 will be referred to as the front, the upper right direction as the rear, the lower right direction as the right, and the upper left direction as the left.

[0018] Reference numeral 1 denotes a cooking device of the present invention. This cooking device 1 is configured to have a main body 2 and a door 3. The main body 2 and the lid 3 are connected by a hinge mechanism (not shown) provided inside each, and this hinge mechanism allows the lid 3 to move freely to open and close relative to the main body 2.

[0019] An operation panel 4 is provided at the bottom of the front of the door 3, and this operation panel 4 can be used to select a menu, start cooking, and so on.

[0020] A heating chamber 5 is provided inside the main body 2, and this heating chamber 5 is composed of an upper plate 7, a right side plate 8, a left side plate 9, and a bottom plate 10, and the upper plate 7 and the right side plate 8, the right side plate 8 and the bottom plate 10, the upper plate 7 and the left side plate 9, and the left side plate 9 and the bottom plate 10 are each fixed with screws or bent tabs, etc., and have a square cylindrical shape.

[0021] Heaters 6 are also disposed within the heating chamber 5. A total of four heaters 6 are disposed, one at the front and rear of the upper side of the heating chamber 5 and one at the front and rear of the lower side. These heaters 6 heat foodstuffs such as bread placed within the heating chamber 5.

[0022] Next, we will explain the mounting structure of the heater 6. Four heaters 6 are arranged, but since the mounting structure for each is the same, we will only explain the heater 6 arranged on the lower front side of the heating chamber 5, and will omit explanations for the other three heaters.

[0023] The heater 6 has a cylindrical portion 11 and an engaging portion 12. The engaging portions 12 are provided at both ends of the heater 6 and are plate-shaped with a width B1 and a height H1. The remaining portion is the cylindrical portion 11, which is cylindrical in shape and has a diameter D1. The width B1 of the engaging portion 12 is larger than the diameter D1 of the cylindrical portion 11. Lead portions 13 are electrically connected to both ends of the heater 6 for wiring to a substrate or the like. The heater 6 has an outer surface made of a glass tube, and is produced as follows: First, the lead portions 13 are electrically connected to both ends of a heating wire (not shown). Then, the heating wire and the connected lead portions 13 are inserted into the glass tube. Then, the positional relationship is adjusted so that the connection portion between the heating wire and the lead portions 13 is positioned in the portion that will become the engaging portion 12, and heat is applied to both ends of the glass tube to process it, and the engaging portion 12 is formed into a plate shape, thereby producing the heater 6. By doing this, the heating wire is placed inside the cylindrical portion 11, the heating wire is electrically connected to the lead portion 13, the connection portion between the heating wire and the lead portion 13 is placed inside the engaging portion 12, and the lead portion 13 is electrically connected to both ends of the heater 6, thereby completing the heater.

[0024] The right side plate 8 is provided with an insertion hole 14 and mounting holes 15, 16, 17, and 18. The mounting holes 15, 16, 17, and 18 are provided one above, one below, one to the left, and one to the right of the insertion hole 14, with the mounting holes 15 and 17 being provided on a vertical axis Y1 passing through the center of the insertion hole 14, and the mounting holes 16 and 18 being provided slightly above a horizontal axis X1 passing through the center of the insertion hole 14. The mounting holes 15, 16, 17, and 18 are positioned symmetrically with respect to the vertical axis Y1.

[0025] Similarly, the left side plate 9 is provided with an insertion hole 19 and mounting holes 20, 21, 22, and 23. The mounting holes 20, 21, 22, and 23 are provided one above, one below, one to the left, and one to the right of the insertion hole 19, with the mounting holes 20 and 22 being provided on a vertical axis Y2 passing through the center of the insertion hole 19, and the mounting holes 21 and 23 being provided slightly above a horizontal axis X2 passing through the center of the insertion hole 19. The mounting holes 20, 21, 22, and 23 are positioned symmetrically with respect to the vertical axis Y2. Furthermore, the insertion hole 14 and the mounting holes 15, 16, 17, and 18 of the right side plate 8 and the insertion hole 19 and the mounting holes 20, 21, 22, and 23 of the left side plate 9 are symmetrical with respect to an imaginary vertical plane passing through the center of the cooking appliance 1.

[0026] The heater fixing member 24 has a box-like shape with one end open and a bottom. A heater mounting hole 25 is provided in the bottom surface of the heater fixing member 24. This heater mounting hole 25 has a shape combining a circular hole and a rectangular hole. The diameter D2 of the arc portion 26, which is the circular hole-shaped portion, is slightly larger than the diameter D1 of the cylindrical portion 11 of the heater 6 and smaller than the width B1 of the engagement portion 12 of the heater 6. The width B2 of the rectangular portion 27, which is a cutout portion, which is the rectangular hole-shaped portion, is larger than the width B1 of the engagement portion 12. The height H2 of the rectangular portion 27 may be determined appropriately within a range larger than the height H1 of the engagement portion 12 and smaller than the diameter D2 of the arc portion 26.

[0027] Furthermore, protrusions 29, 30, 31, and 32 are provided on the end of the opening side of the wall portion 28 of the heater fixing member 24. These protrusions 29, 30, 31, and 32 are positioned so that they can be inserted into the mounting holes 15, 16, 17, and 18. That is, the protrusions 29 and 31 are provided on the vertical axis Y3 passing through the center of the heater fixing member 24, and the protrusions 30 and 32 are provided slightly above the horizontal axis X3 passing through the center of the heater fixing member 24. Furthermore, the heater fixing member 24 has a symmetrical shape with respect to the vertical axis Y3.

[0028] The protrusions 29, 30, 31, and 32 are also positioned so that they can be inserted into the mounting holes 20, 21, 22, and 23.

[0029] The heater fixing members 24 are fixed to the right side plate 8 and the left side plate 9. In the present invention, since four heaters 6 are arranged, the heater fixing members 24 are fixed to four locations on the right side plate 8 and four locations on the left side plate 9, for a total of eight locations.

[0030] On the right side plate 8 side, the protrusions 29, 30, 31, and 32 are inserted into the mounting holes 15, 16, 17, and 18, respectively, and the protrusions 29, 30, 31, and 32 are bent so as to clamp a leg 37 of a rotation-preventing member 33, which will be described later, between the protrusions 30 and 32 and the right side plate 8. In this way, by fixing the heater fixing member 24 to the right side plate 8, a right side plate portion 8A is formed.

[0031] Furthermore, on the left side plate 9 side, the protrusions 29, 30, 31, and 32 are inserted into the mounting holes 20, 21, 22, and 23, respectively, and the protrusions 29, 30, 31, and 32 are bent, thereby fixing the heater fixing member 24 to the left side plate 9. In this manner, by fixing the heater fixing member 24 to the left side plate 9, a left side plate portion 9A is formed.

[0032] When the top plate 7 and the bottom plate 10 are fixed to the right side plate portion 8A and the left side plate portion 9A to form a cylindrical shape that defines the heating chamber 5, the centers of the heater mounting holes 25 of the heater fixing members 24 fixed to the right side plate 8 and the left side plate 9 are in the same position when viewed from the left and right direction of the cooking appliance 1. Therefore, the heaters 6 inserted into these heater mounting holes 25 are mounted horizontally.

[0033] The heater 6 is attached to the heater fixing member 24 with the engaging portion 12 tilted at a predetermined angle. In the present invention, the heater 6 is tilted at 45 degrees. As described above, the width B1 of the engaging portion 12 is larger than the diameter D2 of the arc portion 26, so the engaging portion 12 abuts against the outer surface of the heater fixing member 24 at a location where the arc portion 26 is formed, thereby restricting movement of the heater 6 toward the heating chamber 5. This structure is provided on each of the right side plate portion 8A and the left side plate portion 9A, so that movement of the heater 6 in the left-right direction in the cooking appliance 1 is restricted. Note that the predetermined angle may be, specifically, an angle at which the engaging portion 12 abuts against the outer surface of the heater fixing member 24.

[0034] The engagement portion 12 on the right side plate 8 engages with the receiving portion 34 of the anti-rotation member 33, thereby restricting the rotation of the heater 6. As described above, the anti-rotation member 33 is fixed by clamping the leg portion 37 between the right side plate 8 and the protrusions 30, 32.

[0035] The anti-rotation member 33 is made by bending a metal wire. The anti-rotation member 33 has the receiving portion 34 in its center, which engages with the engaging portion 12. The receiving portion 34 is formed in a shape that follows the outer shape of the engaging portion 12 when the heater 6 is attached. The anti-rotation member 33 has a connecting portion 35 and an arm portion 36 extending horizontally from the receiving portion 34. The connecting portion 35 and the arm portion 36 are formed in shapes that match the protrusions 30, 32 of the right side plate 8 and the heater fixing member 24. The leg portion 37, which is sandwiched between the right side plate 8 and the protrusions 30, 32, is formed vertically from the arm portion 36.

[0036] Next, a description will be given of a method for attaching the heater 6. Here, only the heater 6 disposed on the lower front side of the heating chamber 5 will be described, and a description of the other three heaters will be omitted.

[0037] First, the heater fixing member 24 is attached to the right side plate 8. Specifically, the protrusion 29 is inserted into the mounting hole 15, the protrusion 30 into the mounting hole 16, the protrusion 31 into the mounting hole 17, and the protrusion 32 into the mounting hole 18 from the surface facing the heating chamber 5.

[0038] At this time, the mounting holes 16, 18 are provided slightly above the horizontal axis X1 passing through the center of the insertion hole 14, and the protrusions 30, 32 are provided slightly above the horizontal axis X3 passing through the center of the heater fixing member 24, so that it is possible to prevent mistakes in mounting the heater fixing member 24 in the up-down direction. In addition, the heater fixing member 24 will not be mounted on the right side plate 8 with a 90-degree misalignment.

[0039] Then, the protrusions 29 and 31 are bent to fix the heater fixing member 24 to the right side plate 8. At this time, the protrusions 30 and 32 are not bent. In this manner, by fixing the heater fixing member 24 to the right side plate 8, the right side plate portion 8A is formed.

[0040] Next, the heater fixing member 24 is attached to the left side plate 9. Specifically, the protrusion 29 is inserted into the mounting hole 20, the protrusion 30 into the mounting hole 21, the protrusion 31 into the mounting hole 22, and the protrusion 32 into the mounting hole 23 from the surface facing the heating chamber 5.

[0041] Here, as in the assembly of the right side plate 8, the mounting holes 21, 23 are provided slightly above the horizontal axis X2 passing through the center of the insertion hole 19, and the protrusions 30, 32 are provided slightly above the horizontal axis X3 passing through the center of the heater fixing member 24, so that it is possible to prevent mistakes in mounting the heater fixing member 24 in the up-down direction. In addition, the heater fixing member 24 will not be mounted on the left side plate 9 with a 90-degree misalignment.

[0042] Then, the protrusions 29, 30, 31, and 32 are bent, and the heater fixing member 24 is fixed to the left side plate 9. In this manner, the left side plate portion 9A is formed by fixing the heater fixing member 24 to the left side plate 9. Note that, since the protrusions 29, 30, 31, and 32 have notches at their bases, the force required when bending them can be reduced.

[0043] Next, the right side plate portion 8A, the left side plate portion 9A, the top plate 7, and the bottom plate 10 are respectively fixed together. Fixing the top plate 7, the right side plate portion 8A, and the left side plate portion 9A, and fixing the bottom plate 10, the right side plate portion 8A, and the left side plate portion 9A together can be performed by inserting protrusions into mounting holes and bending them, or by using screws.

[0044] When the top plate 7, the right side plate portion 8A, the left side plate portion 9A and the bottom plate 10 are fixed together, a rectangular cylindrical shape is formed.

[0045] Next, the heater 6 is inserted into the heater mounting hole 25 from either the right side plate portion 8A side or the left side plate portion 9A side, and is then inserted as it is into the heater mounting hole 25 on the opposite surface.

[0046] Then, the heater 6 is rotated by a predetermined angle so that the portion of the outer surface of the heater fixing member 24 where the arc portion 26 is formed comes into contact with the engaging portion 12. In the case of the present invention, the heater 6 is rotated by 45 degrees.

[0047] In this way, the outer surfaces of the left and right heater fixing members 24 come into contact with the engaging portions 12, so that movement of the heater 6 in the longitudinal direction is restricted.

[0048] Then, while engaging the receiving portion 34 of the anti-rotation member 33 with the engaging portion 12 of the heater 6, the arm portion 36 is placed on the protrusions 30, 32. At this time, since the protrusions 30, 32 have a notch, i.e., a recessed shape, at their bases, this recessed shape can be used to position the anti-rotation member 33.

[0049] Then, the protrusions 30 and 32 are bent, the leg 37 is sandwiched between the right side plate 8 and the protrusions 30 and 32, and the anti-rotation member 33 is fixed.

[0050] Since the engaging portion 12 and the receiving portion 34 are engaged and the anti-rotation member 33 is fixed to the right side plate 8, the rotation of the heater 6 is restricted and the heater 6 is fixed within the heating chamber 5.

[0051] Therefore, the heater 6 is prevented from rotating by the anti-rotation member 33, and therefore no load is applied to the lead portions 13 at both ends of the heater 6, so that damage to the heater 6 can be prevented.

[0052] The present invention is not limited to the above-described embodiment, and various modifications are possible within the scope of the invention. For example, in the above-described embodiment, the heater mounting hole 25 is provided in the heater fixing member 24. However, the heater fixing member 24 may be integrally formed with the right side plate 8, so that the heater fixing hole is provided directly in the right side plate and the anti-rotation member is fixed to the right side plate. The heater fixing hole may also be formed in a flat portion of the right side plate. Furthermore, in the above-described embodiment, the heater mounting hole 25 has an arc portion 26 and a rectangular portion 27 as a notch. However, as long as the notch has a shape that allows the engagement portion 12 to be inserted, the notch may have a shape other than a rectangle, such as a semicircular notch.

[0053] Furthermore, although the rotation-stop member 33 is made by bending a metal wire, it may also be made by pressing a metal plate. [Explanation of symbols]

[0054] 1 Cooker 2 Main unit 5 Heating chamber 6 Heater 8 Right side plate 8A Right side plate 9 Left side plate 9A Left side plate 12 Engagement portion 13 Lead section 15, 16, 17, 18 Mounting holes 20, 21, 22, 23 Mounting holes 24 Heater fixing member 25 Heater mounting hole 26 Arc section 27 Rectangular section (notch) 29,30,31,32 Protrusion 33 Anti-rotation member 34 Receiving

Claims

1. A cooking device having a main body with a heating chamber provided therein and a heater having a cylindrical outer surface, the heater being attached between left and right side plate portions of the heating chamber, an engaging portion having a non-circular cross section and projecting outward from an outer surface of the heater is provided at an end of the heater; and a lead portion is provided at the end of the heater; a heater mounting hole is provided in the side plate portion, the heater mounting hole having an arc portion through which the heater can be inserted but the engaging portion cannot be inserted, and a notch portion through which the engaging portion can be inserted, The engaging portion is inserted into the heater mounting hole, The engaging portion engages with a receiving portion of the anti-rotation member, The cooking device according to claim 1, wherein the anti-rotation member is fixed to the side plate portion.

2. 2. The cooking device according to claim 1, wherein the engaging portion is flat, and after the engaging portion is inserted into the heater mounting hole, when the heater is rotated a predetermined angle, the engaging portion abuts against the outer surface of the side plate portion near the arc portion of the heater mounting hole, and the engaging portion engages with the receiving portion.

3. 3. The cooking device according to claim 1, wherein the side plate portion includes a side plate and a heater fixing member, and the heater mounting hole is provided in the heater fixing member.

4. 4. The cooking heater according to claim 3, wherein the heater fixing member is provided with a plurality of protrusions, the side plate is provided with a plurality of mounting holes, the protrusions are inserted into the mounting holes and bent, and the anti-rotation member is clamped between the bent protrusions and the side plate at at least one point and fixed to the side plate.

5. 5. The cooking device according to claim 4, wherein the anti-rotation member is made of a metal wire.

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