JP2001182943A - Heating cooking appliance - Google Patents

Abstract

PROBLEM TO BE SOLVED: To detach an electronic unit from an operating part easily and quickly. SOLUTION: The electronic unit 8 is fixed in a state wherein deformation thereof is suppressed by a unit holder 12, and, in this state, it is fitted to the operating part 3. Therefore, it is unnecessary to fit the electronic unit 8 to the operating part 3 by a large number of screws, differently from the usual practice wherein the electronic unit is fixed in the state of the deformation being suppressed only by the screws fitting the unit to the operating part. Thus, the usual labor and time required usually for removing the screws in large numbers can be saved on the occasion of disassembly for recycling, for instance.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heating cooker in which an electronic unit is arranged behind an operation unit.

[0002]

2. Description of the Related Art Conventionally, in a cooking device such as a microwave oven, an operation unit is provided on a front surface of a housing having a heating chamber, and an electronic unit is arranged behind the operation unit (inside the housing). ing. This electronic unit consists of a circuit board such as a printed circuit board on which necessary electronic components are mounted. The circuit board is directly attached to the operation section with a nail and a screw or a screw alone. Thus, at least the operation of the operation unit by the user is accepted.

However, in this case, the circuit board of the electronic unit has a problem of deformation due to heat or moisture during heating and cooking, particularly a problem of warping. When such a deformation occurs, the circuit board is mounted on the circuit board. The distance between the electronic component, especially the switch that responds to the operation of the operation unit, and the operation unit changed, and it became impossible to operate correctly, the switch was always operated, or the operational feeling changed. Causes malfunction. For this reason, conventionally, the circuit board of the electronic unit is attached using a large number of screws so as not to cause deformation.

[0004]

In recent years, the idea of recycling various devices has become widespread, and cookers are no exception. In a heating cooker, the operation unit is generally formed of easily recyclable plastic, while the electronic unit is formed of a circuit board and electronic components that are difficult to recycle. For this reason, when disassembling the product for recycling, it is necessary to remove the electronic unit from the operation unit. At this time, in the conventional case, the circuit board of the electronic unit is attached to the operation unit with a large number of screws as described above. Therefore, the large number of screws must be removed one by one, which is troublesome and time-consuming, and therefore has a problem that the cost is high.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a heating cooker in which an electronic unit can be easily and quickly removed from an operation unit.

[0006]

In order to achieve the above object, a heating cooker according to the present invention has an electronic unit having electronic components mounted on a circuit board on the back side of an operation unit. A unit holder for receiving at least an operation of the operation unit, wherein the unit unit fixes the electronic unit in a deformation-suppressed state, and the unit holder is attached to the operation unit.
Invention).

According to this method, the electronic unit is fixed to the operation unit by the unit holder in a deformation-suppressed state, and the electronic unit is attached to the operation unit by using many screws as in the prior art. This eliminates the need to perform this operation, thereby saving the labor and time conventionally required for removing many screws at the time of disassembly.

In this case, it is preferable that the unit holder has, as fixing means for fixing the electronic unit in the deformation-suppressed state, a receiving portion for receiving the circuit board of the electronic unit in contact therewith. In this case, since the deformation of the circuit board of the electronic unit in the unit holder can be suppressed by using the receiving portion of the unit holder, the number of screws used for suppressing the deformation can be reduced. Therefore, the electronic unit can be easily and quickly removed from the unit holder.

Further, it is preferable that the operating section has a latching section, and the unit holder is latched to the latching section and attached to the operating section. In this one,
Since the attachment of the unit holder to the operation unit can be performed by locking the locking unit, the number of screws to be used can be reduced correspondingly, and the number and time required for disassembly can be further reduced.

Further, the operating portion may have a holder receiving member, and the unit holder may be pushed into and locked by the holder receiving member and attached to the operating portion. In this case, the unit holder can be attached to the operation unit by simply pushing it into the holder holder of the operation unit, and the unit holder can be easily removed by the reverse operation, so that the number and time required for disassembly can be further reduced. It becomes possible.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention applied to a microwave oven will be described below with reference to FIGS. First, FIG. 2 shows a housing 1 of a microwave oven, which is not shown. Although not shown, a heating chamber is provided therein, and a heating means for heating and cooking an object to be heated placed in the heating chamber is used as a micro unit. It has a microwave oscillator such as a magnetron that supplies waves, a waveguide, and the like.

A door 2 for opening and closing an opening for taking in and out an object to be heated in a heating chamber is provided on a front surface of the housing 1, and an operation unit 3 is provided alongside the door 2. This operation unit 3
It has various operation keys 4 for a user to perform an operation related to heating cooking, and a display window 5 for displaying an indication related to heating cooking, both facing forward.

FIG. 1 shows a state in which the operation unit 3 is detached from the housing 1. The operation unit 3 is formed of a plastic that can be easily recycled into a rectangular box shape with an open rear surface. On the back surface of the front part, an L-shaped hook part 6 as a latching part is protruded at four places at the top, bottom, left and right, and a boss part 7 having a straight rod shape as a screwing part is provided at the upper part. It protrudes from the center. The boss 7 has a hole 7a in the back from the tip surface.

FIG. 1 also shows an electronic unit 8 located on the back side of the operation unit 3. This electronic unit 8
In this case, first and second two circuit boards 9 and 10 made of, for example, printed boards,
0, each of which is comprised of various electronic components (not shown) and a flat cable 11 as a connection line for electrically connecting the circuit boards 9 and 10.

As for the circuit boards 9 and 10, the first circuit board 9 controls a display such as a liquid crystal display corresponding to the display window 5 of the operation section 3 and a general operation of the cooking device. In addition to mounting a microcomputer or the like as an electronic component, various operation keys 4 of the operation unit 3
By mounting a switch such as a tact switch corresponding to the above as an electronic component, the first circuit board 9 is used as an operation side board.

The second circuit board 10 includes electronic components such as a relay for turning on and off a motor for driving a turntable in the heating chamber and an inverter component for turning on and off a microwave oscillator. In addition, the second circuit board 10 is used as a power supply side board by mounting a power transformer as a power supply unit as an electronic component.

The electronic unit 8 is fixed to the unit holder 12. As shown in FIGS. 3 and 4, the unit holder 12 is formed in a rectangular box shape whose front and rear surfaces are open, as shown in FIGS.
The unit holder 12 has a partition wall 13 that partitions the inside of the unit holder 12 back and forth.

As shown in FIG. 5, the partition wall 13 has a boss portion 14 in the form of a straight bar as a receiving portion, as shown in FIG.
At the upper, lower, left, and right positions near the upper portion, and bosses 15 having the same shape of a straight bar as screwing portions are also projected at two centers at the upper and lower positions, respectively, near the lower portion. A boss portion 16 having the same shape as a straight bar is protrudingly provided at two positions on the left and right of the uppermost portion.

A support rib 15a for reinforcement is projected around the boss portion 15, and a hole 15b is formed in the back of each boss portion 15 from the front end face. Further, the bosses 14 and 15 adjust the height to the peripheral wall 12 of the unit holder 12.
On the other hand, the height of the boss 16 is made larger than that of the electronic unit 8 by the thickness of the first circuit board 9 of the electronic unit 8. Further, the first circuit board 9 of the electronic unit 8 has a hole 15
A mounting hole (not shown) is formed corresponding to b, and a fitting hole (not shown) is formed corresponding to the boss portion 16.

On the other hand, as shown in FIG. 6, on the rear surface of the partition wall 13, a boss portion 1 having a straight rod shape as a receiving portion is provided.
7 is protruded at one place on the right side near the upper part, and a boss part 18 having the same straight bar shape as a screwing part is protruded at two places at the upper and lower centers near the lower part, and further as a positioning part. The boss portion 19, which also has the shape of a straight bar, protrudes from the left and right uppermost portions.

A support rib 18a for reinforcement is projected around the boss portion 18, and a hole 18b is formed in the back of each end surface of the boss portion 18. The bosses 17 and 18 adjust the height of the peripheral wall 12 of the unit holder 12.
On the other hand, the height of the boss 19 is larger than that of the electronic unit 8 by the thickness of the second circuit board 10 of the electronic unit 8. Further, on the second circuit board 10 of the electronic unit 8, mounting holes 20 (see FIG. 1) are formed corresponding to the holes 18 b of the bosses 18, and fitting holes 21 corresponding to the bosses 19 are formed. (See FIG. 3). In addition, the unit holder 12 is provided with four hooking portions 22 each having a hooking hole 22a at four locations on the front side of the outer peripheral portion, that is, at the top, bottom, left, and right. A mounting portion 23 having a mounting hole 23a protrudes.

In this configuration, the first circuit board 9 of the electronic unit 8 is mounted on the front side of the electronic component mounting side (in FIG. 1,
(Left side), a fitting hole (not shown) is fitted to the boss portion 16, whereby the first circuit board 9 is positioned at a position where the mounting holes (not shown) respectively match the holes 15 b of the boss portion 15. The back surface is received in contact with the front end surface of the boss portion 14 and the front surface of the peripheral wall 12a of the unit holder 12. Then, the first circuit board 9 is screwed into the hole 15b of the boss portion 15 from the mounting hole of the first circuit board 9 and tightened, thereby connecting the first circuit board 9 to the boss portion 14 and the unit holder 12. It is sandwiched and fixed between the peripheral wall 12a in a deformation-suppressed state.

On the other hand, the mounting hole of the second circuit board 10 is set so that the mounting side of the electronic component is on the rear side (the right side in FIG. 1).
Are fitted in the boss portions 19, so that the mounting holes 20 of the second circuit board 10 are
8b, and the back surface is received in contact with the front end surface of the boss portion 17 and the rear surface of the peripheral wall 12a of the unit holder 12. Then, the second circuit board 10 is screwed from the mounting hole 20 of the second circuit board 10 to the hole 18b of the boss section 18 and tightened, thereby attaching the second circuit board 10 to the boss section 17 and the unit holder 12. Between the peripheral wall 12a and the peripheral wall 12a.

Note that the deformation of the first circuit board 9 and the second circuit board 10 indicates their warp, and the warp is particularly remarkable in each longitudinal direction. Each pinch lock is adapted to function effectively to deter it.

Thereafter, the unit holder 12 having the first circuit board 9 on the front side is advanced from the rear with respect to the operation unit 3 attached to the housing 1, and the hook holes 22a of the hook portions 22 are formed.
The hooks 22 are hooked on the hooks 6 by locking the hooks 22 to the hooks 6 and then slid downward.
The screw 26 is screwed into the hole 7a of the boss 7 of the operation unit 3 from the mounting hole 23a of
2 is attached to the operation unit 3, and the electronic unit 8 is located on the back side of the operation unit 3.

Then, when the operation key 4 of the operation unit 3 is depressed from the front in use in the assembled state, the corresponding switch is operated and the operation of the operation unit 3 is received. The operation of the cooking device is controlled.

As described above, in this configuration, the electronic unit 8 is attached to the operation unit 3 in a state where the electronic unit 8 is fixed in the deformation-suppressed state by the unit holder 12, and the electronic unit is attached to the operation unit like a conventional unit. The electronic unit 8 is not fixed to the operation unit 3 with the screws only because it is not fixed in the deformation-suppressed state only by screws. Therefore, for example, when dismantling for recycling, it is possible to save the trouble and time conventionally required for removing many screws, and it is possible to easily and promptly remove the electronic unit 8 from the operation unit 3 and to disassemble costs. You can save too much. The removal of the electronic unit 8 from the operation unit 3
Specifically, this is performed by removing the screw 26 and then removing the entire hook portion 22 from the hook portion 6.

Further, in the case of this configuration, the unit holder 1
2 has boss portions 14 and 17 as receiving portions for receiving the circuit boards 9 and 10 of the electronic unit 8 in contact with each other as fixing means for fixing the electronic unit 8 in the deformation suppression state.
Thereby, the screws 2 used to suppress the deformation of the circuit boards 9 and 10 of the electronic unit 8 in the unit holder 12
Since the number of the electronic units 8 can be reduced, the number of the electronic units 8 can be easily and quickly removed from the unit holder 12, and the disassembly cost can be further reduced.

The operation section 3 and the unit holder 12 are both provided for recycling. Of these, the operation section 3 is required to be reused for another product while keeping its size, shape and structure. Is difficult to use, and is reused as a material. On the other hand, since the unit holder 12 can be reused for other products without changing its size, shape, and structure, it is reused as a part.

Further, in this configuration, the operation unit 3 has the hook 6 which is a hook, and the unit holder 12 is hooked on the hook 6 and attached to the operation unit 3. . Thereby, the number of screws 26 used for attaching the unit holder 12 to the operation unit 3 can be further reduced (only one screw is used in the embodiment), so that it is possible to further reduce the number and time required for disassembly. In addition, dismantling costs can be further reduced.

In this case, the mounting of the unit holder 12 to the operation unit 3 is not stopped by the hooking of the key unit 6 but is further prevented by the screw 26 so that the unit holder 12 is fixed to the operation unit 3. But it can be done more reliably.

7 to 9 show the second to fourth embodiments of the present invention, in which the same parts as those in the first embodiment are denoted by the same reference numerals. Are omitted, and only different parts will be described.

[Second Embodiment] In the second embodiment shown in FIG. 7, a holder receiver 31 is provided on the operation section 3. More specifically, the holder receiver 31 is formed integrally with the operation unit 3 at the upper and lower portions on the back side of the operation unit 3, and the upper one has a downward wide U-shape. The object has an upward wide U-shape, and each of its internal dimensions is defined by the first circuit board 9 and the unit holder 12 of the electronic unit 8.
Slightly smaller than the outside dimensions. An elastic piece 33 is formed at the rear central portion of each of the holder receivers 31 by two parallel cut portions 32. Further, a tip of each elastic piece 33 is provided with a claw. 34 downward (upper) and upward (lower)
Is formed. Further, correspondingly, the unit holder 12 is provided with a concave portion 35 on the upper and lower surfaces instead of the hooking portion 22 and the attaching portion 23 (only the upper surface is shown).

In this configuration, when the unit holder 12 and the electronic unit 8 together with the electronic unit 8 are pushed into the holder receiving member 31, the elastic pieces 33 bend and deform so as to allow them to enter, and the claws 34 are respectively engaged with the concave portions 35. Thus, the unit holder 12 is locked, and thus the unit holder 12 is attached to the operation unit 3.

In this case, the unit holder 12 can be attached to the operation section 3 by a simple pushing operation, and the unit holder 12 can be easily removed by removing the claw 34 from the concave portion 35 and then pulling out the unit holder 12. So you can
The number and time required for disassembly can be further reduced, and disassembly costs can be further reduced.

In this case, since it is not necessary to slide the unit holder 12 along the back surface of the operation unit 3, there is no need to keep the size of the unit holder 12 small by the amount of the slide. Since the size of the unit holder 12 and thus the size of the circuit boards 9 and 10 of the electronic unit 8 can be increased, more electronic components can be mounted, and the function can be increased accordingly.

[Third Embodiment] In a third embodiment shown in FIG. 8, an identification mark 41 is provided on the rear surface of, for example, the partition portion 13 of the unit holder 12, and in this case, the unit holder 1
2 is formed by integral molding. This identification mark 41
Is for recognizing the size of the unit holder 12, for example, and it is convenient to reuse the unit holder 12 for each model.

[Fourth Embodiment] In a fourth embodiment shown in FIG. 9, the unit holder 12 is formed of a flame-retardant material, for example, a flame-retardant plastic, and an enclosure 51 is formed in the unit holder 12. are doing. This enclosure 51
In detail, it is formed in an L-shape continuous with the peripheral wall 12a of the unit holder 12 at the same height on the rear surface of the partition portion 13 of the unit holder 12 and mounted on the second circuit board 10 of the electronic unit 8. The power supply unit such as the power transformer is enclosed.

In this case, even if a fire occurs from the power supply unit of the electronic unit 8, it is retained inside the enclosure 51 and
Since the spread of fire to other parts can be prevented, the product can be more reliably protected.

The above embodiments may be implemented not only individually but also in combination with another one as appropriate. Further, the electronic unit 8 may not include the second circuit board (power-supply-side board) 10 but include only the first circuit board (operation-side board) 9. Furthermore, the whole is not limited to a microwave oven, and similarly, an oven range having a heating function by a heater, a fan, or the like, an oven having only a heating function by the heater, a fan, or the like (not having a microwave function), and the like. Applicable. others,
The present invention is not limited to the embodiments described above and shown in the drawings, and can be implemented with appropriate modifications without departing from the scope of the invention.

[0041]

The present invention is as described above.
The following effects are obtained. According to the cooking device of claim 1,
It is not necessary to attach the electronic unit to the operation unit with many screws, and the time and effort conventionally required to remove many screws at the time of disassembly can be omitted, making it easy to remove the electronic unit from the operation unit. In addition, it can be performed quickly and the dismantling cost can be reduced.

According to the second aspect of the present invention, since the number of screws used for suppressing deformation of the electronic unit in the unit holder can be reduced, the electronic unit can be easily and quickly removed from the unit holder. The dismantling cost can be further reduced. According to the heating cooker of the third aspect, the number of screws used for attaching the unit holder to the operation unit can be reduced, so that the number and time required for disassembly can be further reduced, and disassembly costs can be further reduced. Can be.

According to the fourth aspect of the present invention, the unit holder can be attached to the operation section by a simple push-in operation, and can be easily removed by a reverse pull-out operation. Can be further omitted,
Demolition costs can be further reduced.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a main part showing a first embodiment of the present invention.

FIG. 2 is a perspective view of the entire appearance.

FIG. 3 is a perspective view of a unit holder alone.

FIG. 4 is a sectional view of the unit holder taken along the line AA in FIG. 3;

FIG. 5 is a front view of a unit holder.

FIG. 6 is a rear view of the unit holder.

FIG. 7 is a view corresponding to FIG. 1, showing a second embodiment of the present invention.

FIG. 8 is a view corresponding to FIG. 6, showing a third embodiment of the present invention.

FIG. 9 is a view corresponding to FIG. 6, showing a fourth embodiment of the present invention.

[Explanation of symbols]

3 is an operation part, 6 is a key part (hook part), 8 is an electronic unit, 9 and 10 are circuit boards, 12 is a unit holder, 1
Reference numerals 4 and 17 denote boss portions (receiving portions), 22 denotes hook portions, 26 denotes screws, and 31 denotes holder holders.

Claims (4)

[Claims] An electronic unit comprising electronic components mounted on a circuit board is arranged on the back side of an operation unit, and at least an operation of the operation unit is received by the electronic unit. A cooking device comprising: a unit holder fixed to the operation unit; and the unit holder attached to the operation unit. 2. The heating cooker according to claim 1, wherein the unit holder has a receiving portion as a fixing means for fixing the electronic unit in a deformation-suppressed state, the receiving portion being brought into contact with a circuit board of the electronic unit. . 3. The cooking device according to claim 1, wherein the operation section has a latch section, and the unit holder is latched to the latch section and attached to the operation section. 4. The heating cooker according to claim 1, wherein the operation section has a holder receiver, and the unit holder is pushed into and locked by the holder receiver and attached to the operation section.