gas oven

Abstract

To provide a gas oven capable of preventing heat damage of harnesses even if an operation unit is provided at an upper side of a burning chamber.SOLUTION: An operation unit 10 includes a front case 20, a rear case 30, and an electric substrate. The front case 20 is fixed to an attachment plate part 7. The rear case 30 is fixed to a rear side of the front case 20. The electric substrate is stored between the front case 20 and the rear case 30. Rear surfaces of an upper part 301 and a right part 302 of the rear case 30 are recessed to a front side farther than a rear surface of a rear wall 321 of an expansion part 32. The structure allows an arrangement groove 41 and an arrangement groove 42 to be respectively formed at the upper side of a rear surface of the operation unit 10 and a right side of the rear surface. Harnesses 91 to 93 are arranged at inner sides of the arrangement grooves 41, 42. Opening grooves 311 to 313 are provided at the inner sides of the arrangement grooves 41, 42. The opening grooves 311 to 313 are connected to the electric substrate by the harnesses 91 to 93 being inserted into the operation unit 10.SELECTED DRAWING: Figure 7

Description

Technical Field

[0006] , , ,

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[0001] The present invention relates to a gas oven.

Background Art

[0002] Conventionally, in a kitchen counter, a gas oven incorporated under a gas stove is known (see, for example, Patent Document 1). The gas oven includes a baking chamber and an oven door. The oven door opens and closes an opening at the front side of the baking chamber. Such an in-built gas oven is installed at a low height. Therefore, considering the operability of the user, it is preferable to provide an operation unit above the oven door.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, when the operation unit is provided above the oven door, since the heat from the baking chamber rises, the harness connected to the operation unit may be thermally damaged.

[0005] An object of the present invention is to provide a gas oven capable of preventing thermal damage to a harness even when the operation unit is provided above the baking chamber.

Means for Solving the Problems

[0006] The gas oven according to claim 1 comprises a baking chamber having an opening on the front side, an oven door provided on the front side of the baking chamber for opening and closing the opening, and an operating unit provided on the upper side of the oven door and electrically connected to a controller via a harness, wherein a metal mounting plate portion with its surface direction facing forward is provided on the upper side of the opening of the baking chamber, the operating unit comprises a resin front case fixed to the mounting plate portion and having an operating button on its front surface, a resin rear case fixed to the rear side of the front case, and one or more electrical circuit boards housed between the front case and the rear case, the outer edge of the rear case is provided with a recess formed in front of the rear surface of the other parts other than the outer edge portion, the harness being disposed inside, and a connection opening is provided inside the recess for inserting the harness into the interior of the front case and the rear case and connecting it to the electrical circuit board. The connection opening can be, for example, a hole or a groove.

[0007] The rear surface of the other portion of the rear case of the gas oven according to claim 2 is provided with one or more boss portions projecting rearward, and the rear end of the boss portion may be in contact with the mounting plate portion.

[0008] The gas oven according to claim 3 may have fixing holes on the inside of the recess for fixing the clip member attached to the harness. [Effects of the Invention]

[0009] According to the gas oven of claim 1, the harness is arranged in a recess provided in the rear case, which allows the distance from the mounting plate to the harness to be increased. As a result, even if the mounting plate is heated by the heat of the oven, the direct transfer of that heat to the harness is reduced, thereby reducing the possibility of thermal damage to the harness.

[0010] According to the gas oven of claim 2, direct contact between the rear case and the mounting plate can be suppressed. Therefore, heat from the oven can be less likely to be transferred to the harness disposed in the recessed area, further reducing the possibility of thermal damage to the harness.

[0011] According to the gas oven of claim 3, the harness can be prevented from falling out of the recess, thereby further reducing the possibility of thermal damage to the harness. [Brief explanation of the drawing]

[0012] [Figure 1] This is a perspective view of gas oven 1. [Figure 2] This is a perspective view of the gas oven 1 with the oven door 6 open. [Figure 3] This is a perspective view of the gas oven 1 with the control unit 10 removed. [Figure 4] This is an exploded perspective view of the operating unit 10 that is attached to the mounting plate 7. [Figure 5] This is a perspective view of the rear case 30, seen from the rear. [Figure 6] This is a perspective view of the control unit 10 from the rear before harnesses 91-94 are attached. [Figure 7] This is a rearward perspective view of the operating unit 10 and mounting plate 7 to which harnesses 91-94 are attached. [Figure 8] This is a rearward perspective view of the operating unit 10, which is fixed to the mounting plate 7. [Figure 9] Figure 8 is a cross-sectional perspective view of the mounting plate portion 7 and the operating portion 10, obtained by cutting along line II. [Figure 10] Figure 8 shows a cross-sectional view taken in the direction of line II. [Modes for carrying out the invention]

[0013] Hereinafter, embodiments of the present invention will be described. The device configurations and the like described below are not intended to be limited to only those, without specific description, but are merely illustrative examples. The drawings are used to explain the technical features that can be adopted by the present invention. In this embodiment, the front-back, left-right, and up-down directions shown in the drawings are used for explanation. Also, the scales of the respective drawings do not necessarily match each other, and are appropriately enlarged or reduced according to the object to be illustrated.

[0014] Referring to FIGS. 1 to 3, the configuration of the gas oven 1 will be described. The gas oven 1 shown in FIG. 1 is a built-in gas oven incorporated into a kitchen counter (not shown). The gas oven 1 is installed, for example, below a built-in stove.

[0015] The gas oven 1 includes a main body 2, a baking chamber 5 (see FIG. 2), an oven door 6, an exhaust pipe 9, an operation unit 10, side fillers 12, 13, etc. The main body 2 is a rectangular parallelepiped metal box. As shown in FIG. 2, a large rectangular opening 2A is provided on the front surface of the main body 2. A rectangular frame portion 17 is fixed inside the opening 2A. A rectangular opening 17A is provided at the center of the rectangular frame portion 17. The baking chamber � is provided inside the main body 2 and behind the rectangular frame portion 17. An object to be cooked is accommodated inside the baking chamber 5. A rectangular opening 5A is provided on the front surface of the baking chamber 5. The opening 5A is provided behind the openings, 2A, 17A. The openings 2A, 17A, 5A communicate with each other in the front-back direction.

[0016] The oven door 6 is formed in a substantially rectangular shape in front view, and is provided so as to be vertically opened and closed with the lower end side as an axis at the lower front side of the rectangular frame portion 17 (see FIG. 2). A handle 6A extending in the left-right direction is provided at the upper part of the front surface of the oven door 6. The oven door 6 closes the opening 5A of the baking chamber 5 through the opening 17A of the rectangular frame portion 17 in the closed state. Inside the main body 2, a combustion device (not shown) is provided below the baking chamber 5. The combustion device includes a gas burner. The high-temperature air heated by the combustion device flows into the baking chamber 5 by a fan (not shown). Thereby, the temperature inside the baking chamber 5 rises, and the object to be cooked is heated and cooked.

[0017] The exhaust pipe 9 extends upward through an opening (not shown) provided at the rear part of the baking chamber 5 to the rear upper surface of the main body 2 and is connected to the exhaust part (not shown) of the built-in stove. The exhaust pipe 9 communicates with the inside of the baking chamber 5 and allows the high-temperature air flowing out from the inside of the baking chamber 5 to flow into the exhaust part of the built-in stove. Thereby, the high-temperature air flowing out from the inside of the baking chamber 5 is discharged to the outside through the exhaust pipe 9 and the exhaust part of the built-in stove.

[0018] The operation unit 10 is formed in a substantially prismatic shape extending in the left-right direction and is screwed to a mounting plate portion 7 (see FIG. 3) fixed to the upper front portion of the main body 2. When the gas oven 1 is viewed from the front, the operation unit 10 is disposed above the oven door 6, and both left and right end portions of the operation unit 10 protrude to both left and right sides more than the oven door 6. Various buttons and a display unit, etc. described later are provided on the front surface of the operation unit 10. A locking projection 26 is provided protruding downward on the right side of the lower surface portion of the operation unit 10. A locking projection 27 is provided protruding downward on the left side of the lower surface portion of the operation unit 10.

[0019] The side fillers 12, 13 are respectively disposed below both left and right end portions protruding to both left and right sides of the operation unit 10 and on both left and right sides of the oven door 6. The side fillers 12, 13 are formed in a substantially rectangular shape elongated in the up-down direction in front view. The upper end portion of the right side filler 12 is locked to the locking projection 26, and the upper end portion of the left side filler 13 is locked to the locking projection 27. In a state of being locked to each of the locking projections 26, 27, the side fillers 12, 13 are respectively screwed to the right side portion and the left side portion of the rectangular frame portion 17.

[0020] Referring to Figures 4 and 7, the shape of the mounting plate portion 7 will be described. As shown in Figure 4, the mounting plate portion 7 is a substantially rectangular metal plate extending in the left-right direction when viewed from the front, and comprises a main body portion 71, a right extension portion 72, a left extension portion 73, an upper projection portion 74, and a lower projection portion 75. The main body portion 71 is formed in a substantially rectangular shape extending in the left-right direction when viewed from the front. A substantially rectangular opening 76 for the right harness is provided at the right end of the main body portion 71. A folded-back piece 76A is provided at the left inner edge of the right harness opening 76. The folded-back piece 76A is formed in a substantially rectangular shape and is folded back from the left inner edge to the rear and left of the main body portion 71. A substantially rectangular opening 77 for the left harness is provided at the left end of the main body portion 71. A folded-back piece 77A is also provided at the right inner edge of the left harness opening 77. The folded-back piece 77A is also formed in a roughly rectangular shape and is folded back from the right inner edge to the rear and right of the main body 71.

[0021] A slightly elongated, roughly rectangular locking hole 78 is provided slightly to the right of the center in the left-right direction of the main body 71 and near the lower end. A slightly elongated, roughly rectangular locking hole 79 is also provided slightly to the left of the center in the left-right direction of the main body 71 and near the lower end. Six fixing holes 701 to 706 are provided in the main body 71, spaced apart from right to left. Fixing holes 701, 703, 704, and 706 are located near the lower end of the main body 71, while fixing holes 702 and 705 are located near the center in the vertical direction of the main body 71.

[0022] The right extension 72 protrudes forward from the right end of the main body 71 and is formed in a roughly rectangular shape that is long in the vertical direction when viewed from the right side. The right extension 72 is provided with a pair of upper and lower fixing holes 721 and 722. The fixing holes 721 and 722 penetrate the right extension 72 in the left direction. The left extension 73 protrudes forward from the left end of the main body 71 and is formed in a roughly rectangular shape that is long in the vertical direction when viewed from the left side. The left extension 73 is provided with a pair of upper and lower fixing holes 731 and 732. The fixing holes 731 and 732 penetrate the left extension 73 in the left direction. The upper projection 74 protrudes rearward from the upper end of the main body 71 and is formed in a roughly strip shape that is long in the left direction when viewed from above. The lower projection 75 protrudes forward from the lower end of the main body 71 and is formed in a roughly strip shape that is long in the left direction when viewed from below.

[0023] As shown in Figure 3, the mounting plate portion 7, having the above shape, is positioned on the upper front surface of the main body portion 2 and fastened with six screws 8 through six fixing holes 701 to 706 provided in the main body portion 71 to six fixing holes (not shown) on the main body side provided on the upper front surface of the main body portion 2. In this way, the mounting plate portion 7 is fixed to the upper front surface of the main body portion 2.

[0024] The configuration of the control unit 10 will be explained with reference to Figures 4 to 6. As shown in Figure 4, the control unit 10 comprises a front case 20 and a rear case 30, which are combined and fixed to each other in the front-to-back direction to form a roughly rectangular box-shaped body that is long in the left-to-right direction. Inside the control unit 10 are housed three electrical circuit boards 51 to 53, a fan 55, etc., which will be described later.

[0025] The structure of the front case 20 will be described with reference to Figures 4 and 5. The front case 20 is formed in the shape of a roughly rectangular box that extends in the left-right direction when viewed from the front and opens toward the rear. The material of the front case 20 is resin. The front case 20 comprises a front wall 21, a right wall 22, a left wall 23, an upper wall 24, and a lower wall 25 (see Figures 9 and 10).

[0026] The front wall portion 21 is formed in a roughly rectangular shape extending in the left-right direction when viewed from the front. On the front surface of the front wall portion 21, from left to right, are a power button 211, five buttons 212, a display unit 213, two buttons 214, a display unit 215, five buttons 216, and a fan slit 28. The power button 211, five buttons 212, two buttons 214, and five buttons 216 are supported so as to be movable in the front-rear direction relative to the front wall portion 21. The display units 213 and 215 are provided corresponding to the respective positions of the indicators 63 and 65 described later, and are formed by seven-segment shaped slits. The fan slit 28 is provided in a position opposite the fan 55 described later, and the operation of the fan 55 allows outside air to flow into the operating unit 10. A resin film 29 is attached to the front surface of the front wall portion 21. The resin film 29 holds the various buttons 211, 212, 214, and 216 to the front wall portion 21 and protects the front surface of the front wall portion 21. The resin film 29 is printed with letters, symbols, patterns, etc.

[0027] The right wall portion 22 protrudes rearward from the right end of the front wall portion 21 and is formed in a roughly rectangular shape that is elongated vertically when viewed from the right side. The right wall portion 22 is provided with a pair of upper and lower fixing holes 221 and 222. The fixing holes 221 and 222 penetrate the right wall portion 22 in the left-right direction. As shown in Figure 7, the left wall portion 23 protrudes rearward from the left end of the front wall portion 21 and is formed in a roughly rectangular shape that is elongated vertically when viewed from the left side. The left wall portion 23 is also provided with a pair of upper and lower fixing holes 231 and 232. The fixing holes 231 and 232 penetrate the left wall portion 23 in the left-right direction.

[0028] The upper wall portion 24 protrudes rearward from the upper end of the front wall portion 21 and is formed in a substantially rectangular shape that is long in the left-right direction when viewed from above. A sheet-like elastic member 241 is fixed to the right rear end of the upper surface of the upper wall portion 24, and a sheet-like elastic member 242 is also fixed to the left rear end of the upper surface of the upper wall portion 24. The elastic members 241 and 242 are made of rubber, but other elastic materials may be used. The bottom of a built-in stove, for example, comes into contact with the elastic members 241 and 242. The lower wall portion 25 protrudes rearward from the lower end of the front wall portion 21 and is formed in a substantially rectangular shape that is long in the left-right direction when viewed from below. The aforementioned locking projection 26 is provided on the right lower surface of the lower wall portion 25, protruding downward, and the aforementioned locking projection 27 is provided on the left lower surface, protruding downward.

[0029] Referring to Figures 4 and 5, the structure of the rear case 30 will be described. As shown in Figure 4, the rear case 30 is formed in a roughly rectangular shape that is long in the left-right direction when viewed from the front, similar to the front case 20, and has the same size as the inner area that opens toward the rear of the front case 20. The material of the rear case 30 is also resin. On the front of the rear case 30, from left to right, the electrical circuit boards 51 to 53 and the fan 55 are mounted. Of the electrical circuit boards 51 to 53, the central electrical circuit board 52 has the longest width in the left-right direction, and the left electrical circuit board 51 has the shortest width in the left-right direction.

[0030] A power switch 61 is provided in the center of the front of the electrical circuit board 51. The power switch 61 corresponds to the position of the power button 211 on the front case 20. A connection terminal 511 is provided at the left end of the front of the electrical circuit board 51. A connection terminal 512 is provided at the upper end of the front of the power switch 61. On the front of the electrical circuit board 52, from left to right, there are five switches 62, a display unit 63, and two switches 64. The five switches 62 correspond to the positions of the five buttons 212 on the front case 20. The display unit 63 is a 7-segment LED and corresponds to the position of the display unit 213 on the front case 20. The two switches 64 correspond to the positions of the two buttons 214 on the front case 20. A connection terminal 521 is provided on the right side of the upper end of the front of the electrical circuit board 52. On the front of the electrical circuit board 53, from left to right, there is a display unit 65 and five switches 66. The display unit 65 is also a 7-segment LED and corresponds to the position of the display unit 215 on the front case 20. The five switches 66 correspond to the positions of the five buttons 216 on the front case 20. A connection terminal 531 is provided in the upper right corner of the front of the electrical circuit board 53.

[0031] As shown in Figure 5, a bulge 32 is provided on the rear surface of the rear case 30, excluding the upper and right ends (an example of the "other parts" of the present invention). The bulge 32 is formed in a substantially rectangular shape that is long in the left-right direction when viewed from the rear, and bulges out in a box shape towards the rear from the rear surface of the rear case 30. The bulge 32 comprises a rear wall 321, an upper wall 322, a right wall 323, a left wall 324 (see Figure 4), and a lower wall 325 (see Figures 9 and 10). The rear wall 321 is formed in a substantially rectangular shape that is long in the left-right direction when viewed from the rear. The rear wall 321 comprises a ventilation slit 37, four boss portions 34, and two mounting claws 35 and 36. The ventilation slit 37 is provided on the left end side of the rear wall 321, i.e., on the opposite side from the fan 55 (see Figure 4). The four boss portions 34 are formed in a short-axis cylindrical shape and are provided at the upper end of the rear surface of the rear wall 321, projecting rearward at intervals in the left-right direction.

[0032] Two mounting claws 35 and 36 are provided at the lower end of the rear surface of the rear wall 321, spaced apart in the left-right direction. Mounting claw 35 is provided to the right of the left-right center of the rear wall 321, and mounting claw 36 is provided to the left of the left-right center of the rear wall 321. Mounting claw 35 has a rear projection 351, a downward projection 352, and an inclined portion 353, and is formed in an inverted L shape when viewed from the side. The rear projection 351 protrudes rearward from the lower end of the rear wall 321. The downward projection 352 protrudes downward from the center of the rear end of the rear projection 351, excluding both the left and right sides. The width of the downward projection 352 is approximately the same as the width of the locking hole 78 of the mounting plate 7. The inclined portion 353 protrudes from the lower end of the downward projection 352, inclined diagonally downward with respect to the rear, and tapers towards the end. End faces 355 and 356 are formed on both the left and right sides of the front end of the rear projection 351. Although not described in detail here, the mounting claw 36 has the same shape as the mounting claw 35 and includes a rearward projection 361, a downward projection 362, and an inclined portion 363.

[0033] The upper wall 322 protrudes forward from the upper end of the rear wall 321 and is formed in a roughly elongated, strip-like shape in the left-right direction when viewed from above. The right wall 323 protrudes forward from the right end of the rear wall 321 and is formed in a roughly elongated, strip-like shape extending in the up-down direction when viewed from the right side. The corner where the right end of the upper wall 322 and the upper end of the right wall 323 connect to each other is formed in an arc shape. The left wall 324 protrudes forward from the left end of the rear wall 321 and is formed in a roughly elongated, strip-like shape extending in the up-down direction when viewed from the left side. The lower wall 325 protrudes forward from the rear end of the rear wall 321 and is formed in a roughly elongated, strip-like shape extending in the left-right direction when viewed from below.

[0034] On the rear surface of the rear case 30, an upper portion 301 is provided above the bulging portion 32, and a right portion 302 is provided on the right side. The upper portion 301 protrudes upward from the front end of the upper wall 322 of the bulging portion 32 and is formed in a substantially rectangular shape that extends in the left-right direction when viewed from the rear. The right portion 302 protrudes to the right from the front end of the right wall 323 of the bulging portion 32 and is formed in a substantially rectangular shape that extends in the up-down direction when viewed from the rear. The right end of the upper portion 301 and the upper end of the right portion 302 are connected perpendicularly to each other. The rear surfaces of the upper portion 301 and the right portion 302 are recessed in front of the rear surface of the rear wall 321 of the bulging portion 32. As a result, on the rear surface of the operating section 10, a mounting groove 41 is formed on the inside sandwiched between the lower surface of the upper wall 24 of the front case 20, the rear surface of the upper portion 301, and the upper surface of the upper wall 322. Furthermore, a mounting groove 42 is also formed on the inside, sandwiched between the left side (inner surface) of the right wall portion 22 of the front case 20, the rear surface of the right side portion 302, and the right side of the right wall 323. A stepped portion 33 is provided on the left side of the rear surface of the upper portion 301. The stepped portion 33 protrudes in a box shape toward the rear. The length of the stepped portion 33 in the front-rear direction is shorter than the length of the upper wall 322 of the bulging portion 32 in the front-rear direction.

[0035] Opening grooves 311 and 312 are provided at the upper end of the upper portion 301. As shown in Figure 4, the opening groove 311 corresponds to the position of the connection terminal 531 of the electrical circuit board 53. The opening groove 312 corresponds to the position of the connection terminal 521 of the electrical circuit board 52. An opening groove 313 is provided at the upper end of the stepped portion 33 (see Figure 5). The opening groove 313 corresponds to the position of the connection terminal 512 of the electrical circuit board 51. An opening groove 314 is provided at the front end of the left wall 324 of the bulging portion 32. The opening groove 314 corresponds to the position of the connection terminal 511 of the electrical circuit board 51. The opening grooves 311 to 313 are formed in a horizontally elongated slit shape when viewed from the rear. The opening groove 314 is formed in a vertically elongated slit shape when viewed from the rear.

[0036] As shown in Figure 5, six fixing holes 31B to 31G are provided in the upper part 301, spaced apart in the left-right direction. The fixing holes 31B to 31G penetrate the upper part 301 in the front-rear direction. A fixing hole 31A is provided at the corner where the upper part 301 and the right part 302 intersect. The fixing hole 31A penetrates the corner where the upper part 301 and the right part 302 intersect in the front-rear direction.

[0037] Referring to Figures 5 to 7, an example of how to attach harnesses 91 to 94 to the rear case 30 will be described. Note that harnesses 91 to 94 shown in Figures 6 and 7 are bundles of multiple wires, but the number of wires bundled is arbitrary. As shown in Figure 6, terminal 91A is provided at one end of harness 91. Terminal 92A is provided at one end of harness 92, and terminal 92B is provided at the other end. Terminal 93A is provided at one end of harness 93, and terminal 93B is provided at the other end. Terminal 94A is provided at one end of harness 94. Clip 81 is pre-fixed to harness 91, three clips 82 to 84 are pre-fixed to harness 92, and three clips 85 to 87 are pre-fixed to harness 93.

[0038] The worker bends the harness 91 into a roughly L-shape and positions it along the inside of the respective routing grooves 42 and 41, and inserts the clip 81 fixed to the harness 91 into the fixing hole 31A to secure it. This fixes the harness 91 along the inside of the respective routing grooves 42 and 41. In this state, the worker inserts one end of the harness 91 into the opening groove 311 and pulls it out to the front of the electrical circuit board 53, and connects terminal 91A to connection terminal 531. The other end of the harness 91 is pulled out to the rear. This completes the installation of the harness 91.

[0039] Next, the worker positions the harness 92 laterally along the inside of the routing groove 41 and inserts the three clips 82-84 fixed to the harness 92 into the fixing holes 31B-31D. This secures the harness 92 along the inside of the routing groove 41. In this state, the worker inserts one end of the harness 92 into the opening groove 311 and pulls it out to the front of the electrical circuit board 53, connecting terminal 92A to connection terminal 531. Furthermore, the worker inserts the other end of the harness 92 into the opening groove 312 and pulls it out to the front of the electrical circuit board 52, connecting terminal 92B to connection terminal 521. This completes the installation of the harness 92.

[0040] Next, the worker positions the harness 93 laterally along the inside of the routing groove 41 and inserts the three clips 85-87 fixed to the harness 93 into the fixing holes 31E-31G. This fixes the harness 93 along the inside of the routing groove 41. In this state, the worker inserts one end of the harness 93 into the opening groove 312 and pulls it out to the front of the electrical circuit board 52, connecting terminal 93A to connection terminal 521. Furthermore, the worker inserts the other end of the harness 93 into the opening groove 313 and pulls it out to the front of the electrical circuit board 51, connecting terminal 93B to connection terminal 512. This completes the installation of harness 93. Next, the worker passes one end of harness 94 through the opening groove 314 and pulls it out to the front of the electrical circuit board 51, connecting terminal 94A to connection terminal 511. The other end of harness 94 is pulled out to the rear. This completes the installation of harness 94.

[0041] Referring to Figures 7 to 10, an example of how to attach the operating unit 10 to the mounting plate 7 will be explained. The worker inserts the rear case 30, to which the harnesses 91 to 94 are attached, into the front case 20 from the rear and attaches it, temporarily assembling the operating unit 10 into a unit (see Figure 7). Next, as shown in Figure 7, the unitized operating unit 10 is attached to the mounting plate 7 from the front. At this time, as shown in Figure 7, the other end of harness 91, which is pulled out from the right end of the rear case 30 of the operating unit 10, is inserted from the front into the right harness opening 76 of the mounting plate 7 and pulled out into the main body 2. On the other hand, the other end of harness 94, which is pulled out from the left end of the rear case 30, is inserted from the front into the left harness opening 77 of the mounting plate 7 and pulled out into the main body 2.

[0042] Here, the harness 91 pulled out rearward from the right harness opening 76 is routed toward the left, but is well guided toward the inside of the main body 2 by the folded-back piece 76A provided on the left inner edge of the right harness opening 76. This prevents the surface of the harness 91 from getting caught on the inner edge of the right harness opening 76 or other components and being damaged. On the other hand, the harness 92 pulled out rearward from the left harness opening 77 is routed toward the right, but is well guided toward the inside of the main body 2 by the folded-back piece 77A provided on the right inner edge of the left harness opening 77. This prevents the surface of the harness 92 from getting caught on the inner edge of the left harness opening 77 or other components and being damaged.

[0043] Next, the mounting claws 35 and 36 provided on the rear surface of the rear case 30 are engaged from the front with the locking holes 78 and 79 provided on the main body portion 71 of the mounting plate portion 7. At this time, by tilting the upper side of the operating portion 10 forward, the inclined portions 353 and 363 provided on the respective tips of the mounting claws 35 and 36 can be easily inserted into the locking holes 78 and 79. Then, by simply hooking the downward protrusions 352 and 362 of the mounting claws 35 and 36 into the locking holes 78 and 79, the rear protrusions 351 and 361 come into contact with the lower edges of the locking holes 78 and 79, and the downward protrusions 352 and 362 lock into the rear surface of the main body portion 71.

[0044] In this state, the left and right end faces 355, 356 (only the mounting claws 35 are shown) at the front ends of the rear protrusions 351, 361 contact the rear surface of the main body 71 of the mounting plate 7. As a result, a gap is formed between the rear surface of the rear wall 321 and the main body 71, and the rear case 30 is precisely positioned and temporarily fixed relative to the main body 71. This determines the front-rear position of the rear case 30 relative to the mounting plate 7. In addition, the downward protrusions 352, 362 of the mounting claws 35, 36 engage with the locking holes 78, 79 without any gap in the width direction (see Figure 8), so the left-right position of the rear case 30 relative to the mounting plate 7 is also determined.

[0045] When the rear case 30 is temporarily fixed to the mounting plate 7, the right wall 22 and left wall 23 of the front case 20 of the operating unit 10 are positioned outside the right extension 72 and left extension 73 of the mounting plate 7, respectively. At this time, the fixing holes 721 and 722 provided in the right extension 72 of the mounting plate 7 are superimposed from the right by the fixing holes 221 and 222 provided in the right wall 22 of the front case 20, from the right. On the other hand, the fixing holes 731 and 732 provided in the left extension 73 of the mounting plate 7 (see Figure 4) are superimposed from the left by the fixing holes 231 and 232 provided in the left wall 23 of the front case 20, from the left.

[0046] In this state, the worker fastens two screws 14 from the right side of the operating unit 10 through fixing holes 221 and 222 in the right wall portion 22 of the front case 20 to fixing holes 721 and 722 in the right extension portion 72 of the mounting plate portion 7. On the other hand, two screws 15 from the left side of the operating unit 10 are fastened through fixing holes 231 and 232 in the left wall portion 23 of the front case 20 to fixing holes 731 and 732 in the right extension portion 72 of the mounting plate portion 7. This fixes the operating unit 10 to the mounting plate portion 7 (see Figure 8).

[0047] The worker then connects the other end of the harness 91, which is pulled out to the inside of the main body 2 through the right harness opening 76 of the mounting plate 7, to a controller (not shown) located inside the main body 2, either directly or via other wiring. Similarly, the other end of the harness 94, which is pulled out to the inside of the main body 2 through the left harness opening 77 of the mounting plate 7, is also connected to a controller (not shown) located inside the main body 2, either directly or via other wiring. In this way, the mounting of the operating unit 10 to the mounting plate 7 is completed.

[0048] Next, the effect of the arrangement grooves 41 and 42 in preventing thermal damage to the harnesses 91 to 93 will be explained. As shown in Figures 8 and 9, when the operating unit 10 is fixed to the mounting plate 7, the three harnesses 91 to 93 are arranged inside the arrangement grooves 41 and 42 provided on the rear surface of the operating unit 10 (see Figure 7). Therefore, the harnesses 91 to 93 are positioned in front of the rear surface of the rear case 30, which is close to the mounting plate 7. As a result, even if the mounting plate 7 is heated by the heat of the oven 5 while the food being cooked is being cooked in the oven 5, the heat is effectively prevented from being directly transferred to the harnesses 91 to 93. Thus, the gas oven 1 can prevent thermal damage to the harnesses 91 to 93 that extend from the inside to the outside of the operating unit 10.

[0049] Furthermore, these three harnesses 91-93 are secured within the routing grooves 41 and 42 by seven clips 81-87. This prevents these harnesses 91-93 from protruding outside the routing grooves 41 and 42. Thus, the gas oven 1 can more reliably prevent these harnesses 91-93 from being damaged by heat.

[0050] Furthermore, four bosses 34 are provided on the rear surface of the rear wall 321 of the bulging portion 32 of the rear case 30 (see Figures 5 and 7). The ends of these four bosses 34 that protrude to the rear abut against the front surface of the main body 71 of the mounting plate 7 (see Figure 10). This maintains a gap P between the rear surface of the rear wall 321 and the main body 71, preventing the rear surface of the rear wall 321 from directly contacting the front surface of the main body 71. Therefore, heat from the baking chamber 5 is less likely to be transferred to the three harnesses 91-93 arranged in the arrangement grooves 41 and 42. Thus, the gas oven 1 can more reliably prevent thermal damage to these harnesses 91-93.

[0051] As described above, the gas oven 1 of this embodiment comprises a baking chamber 5, an oven door 6, and an operating unit 10. The baking chamber 5 has an opening 5A on its front side. The oven door 6 is provided on the front side of the baking chamber 5 so as to be able to open and close vertically with its lower end as the axis, and in the closed state closes the opening 5A. The operating unit 10 is fixed to the upper side of the oven door 6 and above the opening 5A of the baking chamber 5, and is electrically connected to the controller (not shown) of the gas oven 1 via harnesses 91 to 94. Above the opening 5A of the baking chamber 5, a metal mounting plate portion 7 is provided with its surface facing forward. The operating unit 10 comprises a front case 20, a rear case 30, and electrical circuit boards 51 to 53. The resin front case 20 is fixed to the mounting plate portion 7 and comprises a front wall portion 21, an upper wall portion 24, a right wall portion 22, and a left wall portion 23. The front wall portion 21 is equipped with various buttons 211, etc. on its front surface. The resin rear case 30 is fixed to the rear side of the front case 20. The electrical circuit boards 51-53 are housed between the front case 20 and the rear case 30.

[0052] A bulge 32 is provided on the rear surface of the rear case 30, excluding the upper portion 301 and the right portion 302. The rear surfaces of the upper portion 301 and the right portion 302 are formed recessed in front of the rear surface of the bulge 32. A mounting groove 41 is formed on the inside between the lower surface of the upper wall portion 24 of the front case 20, the rear surface of the upper portion 301, and the upper surface of the upper wall 322 of the bulge 32. Furthermore, a mounting groove 42 is formed on the inside between the left surface (inner surface) of the right wall portion 22 of the front case 20, the rear surface of the right portion 302, and the right surface of the right wall 323 of the bulge 32. Harnesses 91 to 93 are mounted inside the mounting grooves 41 and 42. Opening grooves 311 to 313 are provided inside the mounting grooves 41 and 42, at the upper end of the upper portion 301 of the rear case 30. The opening grooves 311-313 are grooves for inserting harnesses 91-93 into the interior of the front case 20 and rear case 30 and connecting them to the electrical circuit boards 51-53.

[0053] Furthermore, in the gas oven 1, the harnesses 91-93 are positioned inside the mounting grooves 41 and 42, which allows for a wider gap between the mounting plate 7 and the harnesses 91-93. This reduces the amount of heat that is directly transferred to the harnesses 91-93, even if the mounting plate 7 is heated by the heat from the baking chamber 5, thereby reducing the possibility of thermal damage to the harnesses 91-93.

[0054] In the above description, the opening grooves 311 to 313 provided at the upper end of the upper part 301 of the rear case 30 are examples of the "connecting openings" of the present invention. The clips 81 to 87 are examples of the "clip members" of the present invention. The rear surface of the upper part 301 of the rear case 30, the upper surface of the upper wall 322 of the bulge 32, and the rear surface of the right part 302 and the right surface of the right wall 323 of the bulge 32 are examples of the "recessed parts" of the present invention.

[0055] It should be noted that the present invention is not limited to the above embodiments, and various modifications are possible. In order to provide the mounting grooves 41 and 42 at the upper and right ends of the rear surface of the operating section 10, the rear surfaces of the upper part 301 and the right part 302 of the rear case 30 are recessed in front of the rear surface of the rear wall 321 of the bulging part 32, but the locations where the mounting grooves 41 and 42 are provided may be other. For example, the left side or lower side of the rear case 30 may be recessed in front of the rear surface of the rear wall 321 of the bulging part 32.

[0056] In the above embodiment, the mounting groove 41 is formed by the lower surface of the upper wall portion 24 of the front case 20, the rear surface of the upper side portion 301, and the upper surface of the upper wall 322, but the upper wall portion 24 of the front case 20 may be omitted. Similarly, the right wall portion 22 of the front case 20 may be omitted for the mounting groove 42. In other words, the harness can be mounted in the "recessed portions" formed at the upper side portion 301 and the right side portion 302, respectively.

[0057] The rear surface of the rear case 30 is provided with two mounting claws 35 and 36, but there may be one mounting claw or three or more. Furthermore, the shape of the mounting claws 35 and 36 is not limited to the above embodiment. For example, the inclined portions 353 and 363 of the mounting claws 35 and 36 may be omitted.

[0058] The opening grooves 311-313 provided in the upper part 301 of the rear case 30 are three in number, but there may be one or four or more opening grooves. Also, in the above embodiment, the grooves are roughly U-shaped when viewed from the front and open upward, but they may be holes that penetrate in the front-to-back direction. The rear wall 321 of the bulging part 32 of the rear case 30 is provided with four boss parts 34, but there may be one or five or more boss parts.

[0059] In the above embodiment, three harnesses 91 to 93 are arranged inside the arrangement grooves 41 and 42, but the number of harnesses to be arranged can be any number.

[0060] In the above embodiment, the oven door 6 is provided on the front side of the baking chamber 5 so as to be able to open and close vertically with its lower end as the pivot point. However, the direction in which the oven door opens and closes is not limited. For example, it may be able to open and close vertically with its upper end as the pivot point, or it may open horizontally.

[0061] The above embodiment uses a gas oven 1, but it may also be a non-gas oven, such as an electromagnetic oven. [Explanation of Symbols]

[0062] 1. Gas oven 5. Firing chamber 5A opening 6 Oven door 7 Mounting plate section 20 Previous Cases 30 Rear Case 34 Boss Section 41,42 Installation grooves 51-53 Electrical circuit board 81-87 clips 91-94 Harness 211 Power button 311-314 Opening groove 321 Back wall

Claims

1. A gas oven comprising a baking chamber having an opening on the front side, an oven door provided on the front side of the baking chamber for opening and closing the opening, and an operating unit provided above the oven door and electrically connected to a controller via a harness, A metal mounting plate portion is provided above the opening of the firing chamber, with its surface direction facing forward. The aforementioned operating unit is A resin front case is fixed to the aforementioned mounting plate and has operation buttons on its front, A resin rear case fixed to the rear side of the aforementioned front case, One or more electrical circuit boards housed between the front case and the rear case Equipped with, The outer edge of the aforementioned rear case is provided with a recess formed in front of the rear surface of the other parts of the case, and the harness is arranged inside this recess. The inside of the recessed portion is provided with a connection opening for inserting the harness into the front case and the rear case and connecting it to the electrical circuit board. A gas oven characterized by [feature].

2. The rear surface of the other part of the rear case is provided with one or more boss portions that protrude to the rear. The rear end of the boss portion is in contact with the mounting plate portion. A gas oven according to claim 1, characterized by the following:

3. The inside of the recess is provided with a fixing hole for securing the clip member attached to the harness. A gas oven according to claim 1 or 2, characterized by the above.

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