JP3619728B2 - Cooker - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a cooking device in which an electronic unit is disposed on the back side of an operation unit.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, in a cooking device, for example, a microwave oven, an operation unit is provided on the front surface of a casing having a heating chamber, and an electronic unit is disposed on the back side (inside the casing) of the operation unit. This electronic unit is constructed by mounting the necessary electronic components on a circuit board such as a printed circuit board, and the circuit board is directly attached to the operation part with a claw and a screw or a screw alone. Thus, at least the operation of the operation unit by the user is accepted.
[0003]
In this case, the circuit board of the electronic unit has a problem of deformation due to heat and moisture during cooking, particularly warpage. When such deformation occurs, the electronic components mounted on the circuit board, Above all, the distance between the switch that responds to the operation of the operation unit and the operation unit changes, causing problems such as that the operation cannot be performed accurately, the switch is always operated, or the operational feeling changes. .
For this reason, conventionally, the circuit board of the electronic unit is attached using many screws so as not to be deformed.
[0004]
[Problems to be solved by the invention]
In recent years, the idea of recycling has become widespread for various devices, and a cooking device is no exception. In the cooking device, the operation unit is generally formed of plastic that can be easily recycled, 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 product, the circuit board of the electronic unit is attached to the operation unit with a number of screws as described above. Therefore, it is necessary to remove the large number of screws one by one, and there is a problem that it takes time and labor for the operation, and thus the cost is high.
[0005]
The present invention has been made in view of the above circumstances, and therefore an object of the present invention is to provide a cooking device in which an electronic unit can be easily and quickly removed from an operation unit.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, in the cooking device of the present invention, an electronic unit formed by mounting electronic components on a circuit board is disposed on the back side of the operation unit, and at least the operation unit is operated by the electronic unit. What is received includes first and second circuit boards included in the electronic unit and a unit holder, and the first and second circuit boards are attached to both sides of the unit holder so as to sandwich the unit holder. Thus, the first and second circuit boards are fixed in a deformation-inhibited state, and the unit holder is attached to the operation portion (invention of claim 1).
[0007]
According to this, since the electronic unit is fixed in a deformation restrained state by the unit holder and attached to the operation part, it is necessary to attach the electronic unit to the operation part with many screws as in the conventional one. Thus, it is possible to save the labor and time conventionally required to remove the many screws during disassembly.
[0008]
In this case, the unit holder may have a receiving portion that receives the circuit board of the electronic unit in contact with it as a fixing means for fixing the electronic unit in a deformation-inhibited state (invention of claim 2).
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.
[0009]
Further, it is preferable that the operation portion has a latching portion, and the unit holder is latched to the latching portion and attached to the operation portion (invention of claim 3).
In this case, since the unit holder can be attached to the operation portion by being hooked to the hooking portion, the number of screws to be used can be reduced correspondingly, and the labor and time for disassembly can be further reduced.
[0010]
Furthermore, the operation part may have a holder receiver, and the unit holder may be attached to the operation part by being pushed and locked to the holder receiver (invention of claim 4).
In this case, the unit holder can be attached to the operation unit simply by pushing it into the holder holder of the operation unit, and can be easily removed by the reverse operation, thus further reducing the labor and time during disassembly. It becomes possible.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention is applied to a microwave oven, and a first embodiment thereof will be described with reference to FIGS.
First, FIG. 2 shows a housing 1 of a microwave oven. Although not shown, a microchamber is provided as a heating means for heating and cooking an object to be heated placed inside the heating chamber. It has a microwave oscillator such as a magnetron that supplies waves, a waveguide, and the like.
[0012]
A door 2 that opens and closes an opening for taking in and out the object to be heated in the heating chamber is provided on the front surface of the housing 1, and an operation unit 3 is provided side by side with the door 2. The operation unit 3 has various operation keys 4 for the user to perform operations related to cooking and a display window 5 for displaying related to cooking, facing forward.
[0013]
FIG. 1 shows a state in which the operation unit 3 is detached from the housing 1, and this operation unit 3 is formed in a rectangular box shape whose rear surface is opened by plastic that is easy to recycle, and its front surface portion. On the back side, L-shaped key 6 as a latching part protrudes in four places, up, down, left and right, and a boss 7 that forms a straight bar as a screwing part is connected to the center 1 at the top. It protrudes at the place. The boss portion 7 has a hole 7a from the front end surface to the back.
[0014]
FIG. 1 also shows the electronic unit 8 located on the back side of the operation unit 3. In this case, the electronic unit 8 includes, for example, first and second circuit boards 9 and 10 made of a printed circuit board, various electronic components (not shown) mounted on the circuit boards 9 and 10, and It consists of a flat cable 11 as a connection line electrically connecting the circuit boards 9 and 10.
[0015]
As for the circuit boards 9 and 10, the first circuit board 9 is a microcomputer for controlling the overall operation of a display device such as a liquid crystal display corresponding to the display window 5 of the operation unit 3 and the cooking device. Etc. as electronic parts, the first circuit board 9 is used as the operation side board by mounting switches such as tact switches corresponding to the various operation keys 4 of the operation unit 3 as electronic parts.
[0016]
On the second circuit board 10, a relay that cuts off a motor that drives a turntable existing in the heating chamber, an inverter component that cuts off a microwave oscillator, and the like are mounted as electronic components. 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.
[0017]
Thus, 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 with both front and rear sides opened by plastic, and a partition wall 13 that partitions the inside of the unit holder 12 back and forth inside. have.
[0018]
In addition, as shown in FIG. 5, the partition wall 13 is provided with a boss portion 14 in the form of a straight bar as a receiving portion on the front surface, projecting at four locations on the upper, lower, left and right sides as screwing portions. The same boss portion 15 having a straight rod shape is projected at two upper and lower central portions near the lower portion, and the same boss portion 16 having a straight rod shape as a positioning portion is further provided at two left and right uppermost portions. It is protruding.
[0019]
Reinforcing support ribs 15 a are provided around the boss 15, and holes 15 b are formed from the front end surfaces of the boss 15 to the back. The boss portions 14 and 15 have the same height as the peripheral wall 12a of the unit holder 12, whereas the boss portion 16 has a height higher than that of the first circuit of the electronic unit 8. The thickness of the substrate 9 is increased. Further, a mounting hole (not shown) corresponding to the hole 15b of the boss portion 15 is formed in the first circuit board 9 of the electronic unit 8 and a fitting hole (not shown) corresponding to the boss portion 16 is also formed. doing.
[0020]
On the other hand, as shown in FIG. 6, a boss portion 17 that forms a straight bar shape as a receiving portion protrudes from the rear surface of the partition wall 13 at one place on the right side near the upper portion, and serves as a screwing portion. The straight bosses 18 are also projected at two upper and lower centers near the lower part, and the same straight bar bosses 19 are positioned as the positioning parts at the upper left and right two places. Has been established.
[0021]
Reinforcing support ribs 18 a are provided around the boss portion 18, and holes 18 b are formed from the front end surfaces of the boss portion 18 to the back. The boss portions 17 and 18 have the same height as the peripheral wall 12a of the unit holder 12, whereas the boss portion 19 has a height higher than that of the second circuit of the electronic unit 8. The thickness of the substrate 10 is increased. Further, a mounting hole 20 (see FIG. 1) is formed in the second circuit board 10 of the electronic unit 8 corresponding to the hole 18 b of the boss portion 18, and a fitting hole 21 corresponding to the boss portion 19. (See the figure).
In addition, the unit holder 12 is provided with hooking portions 22 having hooking holes 22a at four positions on the front surface side of the outer peripheral portion on the front, left, right, and left sides, and at one central portion on the rear surface side of the upper surface of the outer peripheral portion. A mounting portion 23 having a mounting hole 23a is provided in a protruding manner.
[0022]
With this configuration, the first circuit board 9 of the electronic unit 8 is fitted to the boss portion 16 with a fitting hole not shown, with the electronic component mounting side being the front side (left side in FIG. 1). As a result, the first circuit board 9 is positioned so that the mounting holes (not shown) are aligned with the holes 15b of the boss portion 15, and the back surface is 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. It is received in contact. Then, the first circuit board 9 is screwed into the holes 15b of the boss portion 15 from the mounting holes of the first circuit board 9 and tightened, thereby fastening the first circuit board 9 to the boss portion 14 and the unit holder 12. It is sandwiched and fixed in a deformation restrained state with the peripheral wall 12a.
[0023]
On the other hand, with the second circuit board 10, the mounting side of the electronic component is the rear side (right side in FIG. 1), and the fitting hole 21 is fitted to the boss portion 19. The circuit board 10 is positioned so that the mounting holes 20 are aligned with the holes 18 b of the boss portion 18, 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 12 a of the unit holder 12. Then, the second circuit board 10 is screwed into the hole 18b of the boss 18 from the mounting hole 20 of the second circuit board 10 and tightened, thereby fastening the second circuit board 10 to the boss 17 and the unit holder 12. And the peripheral wall 12a are sandwiched and fixed in a deformation restrained state.
[0024]
Note that the deformation of the first circuit board 9 and the second circuit board 10 indicates the warpage thereof, and the warpage is particularly remarkable in the respective longitudinal directions. Fixing works effectively to deter it.
[0025]
Thereafter, the unit holder 12 with 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 hooking holes 22 a of the hooking portions 22 are respectively connected to the hook portions 6. Then, the hooking portion 22 is hooked on the hook portion 6 to be latched by sliding downward, and thereafter, the boss portion 7 of the operation portion 3 from the mounting hole 23 a of the mounting portion 23 of the unit holder 12. The unit holder 12 is attached to the operation unit 3 by screwing the screw 26 into the hole 7a and tightening, and the electronic unit 8 is positioned on the back side of the operation unit 3.
[0026]
Then, in use in such an assembled state, when the operation key 4 of the operation unit 3 is pressed from the front at the time of use, the corresponding switch is operated and the operation of the operation unit 3 is accepted. The operation of the vessel is controlled.
[0027]
As described above, in this configuration, the electronic unit 8 is attached to the operation unit 3 while being fixed in a deformation-suppressed state by the unit holder 12, and only the screws for attaching the electronic unit to the operation unit are used as in the conventional unit. Since it is not fixed in a deformation | transformation suppression state, it is not necessary to attach the electronic unit 8 with respect to the operation part 3 with many screws like the conventional one. Therefore, for example, when disassembling for recycling, it is possible to save the labor and time conventionally required to remove many screws, and the electronic unit 8 can be easily and quickly removed from the operation unit 3, and the dismantling cost can be reduced. Can also be less expensive.
The removal of the electronic unit 8 from the operation unit 3 is specifically performed by removing the screw 26 and then removing the entire hooking unit 22 from the hook unit 6.
[0028]
Further, in this configuration, the unit holder 12 serves as a fixing means for fixing the electronic unit 8 in the deformation-inhibited state, and the bosses 14 and 17 serving as receiving parts received by contacting the circuit boards 9 and 10 of the electronic unit 8. have. As a result, the number of screws 24 and 25 used to suppress deformation of the circuit boards 9 and 10 of the electronic unit 8 in the unit holder 12 can be reduced, so that the electronic unit 8 can be easily and quickly removed from the unit holder 12. The cost of dismantling can be further reduced.
[0029]
The operation unit 3 and the unit holder 12 are both used for recycling, but it is difficult to reuse the operation unit 3 in other products while maintaining the size, shape, and structure. Because it is, it is reused as a material. On the other hand, the unit holder 12 can be reused as it is as a part because it can be reused for other products while maintaining its size, shape and structure.
[0030]
Further, in the present configuration, the operation unit 3 has a hooking portion hook portion 6, and the unit holder 12 is hooked on the hook portion 6 and attached to the operation portion 3. As a result, the number of screws 26 used to attach the unit holder 12 to the operation unit 3 can be further reduced (only one in the embodiment), so that it is possible to further reduce the labor and time during disassembly. , Dismantling costs can be further reduced.
[0031]
Further, in this case, the attachment of the unit holder 12 to the operation part 3 does not end with the hooking to the hook part 6, but is further prevented from coming off by screwing with the screw 26. You can be sure.
[0032]
7 to 9 show the second to fourth embodiments of the present invention. The same parts as those of the first embodiment are denoted by the same reference numerals and the description thereof is omitted. Only the different parts will be described.
[0033]
[Second Embodiment]
In the second embodiment shown in FIG. 7, a holder receiver 31 is provided in the operation unit 3. Specifically, the holder receiver 31 is formed integrally with the operation unit 3 on the upper and lower sides on the back side of the operation unit 3, and the upper one forms a wide U-shape that faces downward. Each of them has an upward wide U-shape, and its inner dimensions are slightly smaller than the outer dimensions of the first circuit board 9 and the unit holder 12 of the electronic unit 8. In addition, an elastic piece 33 is formed by two parallel cut portions 32 at the center of each rear side of the holder receiver 31, and a claw is provided at the tip of each elastic piece 33. 34 is formed downward (upper part) and upward (lower part).
Correspondingly, the unit holder 12 is formed with recesses 35 on the upper surface and lower surface in place of the above-described hooking portion 22 and mounting portion 23 (only the upper surface is shown).
[0034]
In this configuration, when the unit holder 12 is pushed together with the electronic unit 8 into the holder holder 31, the elastic pieces 33 are bent and allowed to enter, and the claws 34 are engaged with the recesses 35, respectively. The unit holder 12 is locked, and thus the unit holder 12 is attached to the operation unit 3.
[0035]
In this case, the unit holder 12 can be attached to the operation unit 3 by a simple pushing operation, and the removal can be easily performed by the reverse operation of pulling out the unit holder 12 after removing the claw 34 from the recess 35. It is possible to further save the labor and time at the time of dismantling and further reduce the dismantling cost.
[0036]
Further, in this case, it is not necessary to slide the unit holder 12 along the back surface of the operation unit 3, so that it is not necessary to keep the size of the unit holder 12 small for the sliding amount. Since the size of 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 functions can be increased accordingly.
[0037]
[Third embodiment]
In the third embodiment shown in FIG. 8, the identification mark 41 is attached to the rear surface of the partition portion 13 of the unit holder 12, for example, by integral molding with the unit holder 12 in this case. The identification mark 41 is used for recognizing the size of the unit holder 12, for example, and can be conveniently used for reusing the unit holder 12 for each model.
[0038]
[Fourth embodiment]
In the 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. More specifically, the enclosure 51 is formed in an L shape that is continuous with the peripheral wall 12 a of the unit holder 12 on the rear surface of the partition 13 of the unit holder 12, and is a second circuit board of the electronic unit 8. A power supply unit such as the power transformer mounted on the power supply unit 10 is enclosed.
[0039]
In this case, even if a fire is generated from the power supply unit of the electronic unit 8, it can be retained inside the enclosure 51 to prevent the fire from spreading to other parts, so that the product can be protected more reliably.
[0040]
Each of the above embodiments, they not singly, be carried out in combination with those appropriate other have good.
Furthermore, the whole is not limited to a microwave oven, and similarly applies to an microwave oven having a heating function by a heater, a fan, etc., an oven having only a heating function by the heater, a fan, etc. (without a microwave oven function), etc. Applicable.
In addition, the present invention is not limited to the embodiments described above and shown in the drawings, and can be implemented with appropriate modifications within a range not departing from the gist.
[0041]
【The invention's effect】
The present invention is as described above and has the following effects.
According to the heating cooker of the first aspect, it is not necessary to attach the electronic unit to the operation unit with a large number of screws, and it is possible to save the labor and time conventionally required to remove the large number of screws at the time of disassembly. The electronic unit can be easily and quickly removed from the operation unit, and the dismantling cost can be reduced.
[0042]
According to the cooking device of claim 2, since the number of screws used to suppress deformation of the electronic unit in the unit holder can be reduced, it is easy and quick to remove the electronic unit from the unit holder, and the disassembly cost Can be further reduced.
According to the cooking device of claim 3, since the number of screws used for attaching the unit holder to the operation unit can be reduced, the labor and time at the time of dismantling can be further reduced, and the dismantling cost can be further reduced. Can do.
[0043]
According to the cooking device of the fourth aspect, the unit holder can be attached to the operation portion by a simple push-in operation, and the removal can be easily performed by the reverse pull-out operation. Can be further reduced.
[Brief description of the drawings]
FIG. 1 is an exploded perspective view of the main part of the first embodiment of the present invention. FIG. 2 is a perspective view of the overall appearance. FIG. 3 is a perspective view of a unit holder alone. FIG. 5 is a front view of the 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 invention. FIG. 6 equivalent diagram showing the embodiment. FIG. 9 equivalent diagram of FIG. 6 showing the fourth embodiment of the present invention.
3 is an operation part, 6 is a hook part (holding part), 8 is an electronic unit, 9 is a first circuit board, 10 is a second circuit board, 12 is a unit holder, and 14 and 17 are boss parts (receiving parts) ), 22 is a hook portion, 26 is a screw, and 31 is a holder holder.

Claims (4)

On the back side of the operation unit, an electronic unit formed by mounting electronic components on a circuit board is disposed, and at least an operation of the operation unit is received by this electronic unit.
The electronic unit includes first and second circuit boards and a unit holder, and the first and second circuit boards are attached to both sides of the unit holder so as to sandwich the unit holder. A heating cooker characterized in that the first and second circuit boards are fixed in a deformation-inhibited state and the unit holder is attached to the operation section. 2. The cooking device according to claim 1, wherein the unit holder has a receiving portion that receives the circuit board of the electronic unit in contact with the electronic unit as a fixing means for fixing the electronic unit in a deformation-inhibited state. The cooking device according to claim 1, wherein the operation portion has a latching portion, and the unit holder is latched on the latching portion and attached to the operation portion. 2. The cooking device according to claim 1, wherein the operation unit has a holder holder, and the unit holder is attached to the operation unit by being pressed and locked to the holder receiver.

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