JPH0144977Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] This invention relates to a cooking appliance, and particularly relates to a cooking appliance with an improved mounting structure for a printed wiring board attached to the back side of an operation panel main body.

[Technical background of the invention and its problems]

In the case of a cooking appliance, for example, a microwave oven, a display device for displaying the cooking status etc. on the back side of the operation panel body and a printed wiring board equipped with electronic components for controlling cooking are installed as shown in Fig. 1. Some are installed adjacent to each other.

Conventionally, this type of display and printed wiring board has been installed as shown in Figure 1.
, a structure is adopted in which the display device a is mounted on the mounting plate b and fixed to the operation panel main body f, and the printed wiring board c is mounted using claws d on the upper and lower parts as shown in Fig. 2. It is fixed independently from the display device a side using the provided support member e.

That is, in order to attach the printed wiring board c, a cut-and-raised part h is provided as a base part with a square hole g in correspondence with the corner part of the printed-wiring board on the back side of the operation panel main body f, and the cut-and-raised part h First, attach the support member e by pushing the claw portion d on the lower side corresponding to the square hole g of the support member e mentioned above into the square hole g,
Thereafter, the through hole i previously provided in the printed wiring board c is aligned with the claw part d of the remaining support member e, and then the printed wiring board c is pushed into the support member e, and the printed wiring board c is inserted through the support member e. and is fixed to the operation panel main body f.

However, assembling the printed wiring board c by pushing, which requires such fine positioning, is difficult to work with, and also requires multiple (generally four) support members e to fix the printed wiring board c. The problem is that there are too many of them and the work efficiency is poor. Moreover, since the support member e is used separately, the cost becomes high. In addition, when the printed wiring board c is supported using the support member e as described above, the height of the support member e enters into the main body of the microwave oven, impairing the effective area inside the main body of the microwave oven. It also has some disadvantages.

[Purpose of invention]

This invention was made with attention to the above circumstances, and its purpose is to create a cooking device in which a printed wiring board can be easily and securely mounted without using support members that cause various problems. It is about providing.

[Summary of the idea]

This idea provides a base on the back side of the operation panel body that receives the part of the printed wiring board on the mounting plate side and the part on the opposite side of the mounting plate, and the part of this base that is opposite to the mounting plate. A holding part for holding the printed wiring board is provided between the mounting plate and the mounting plate, and an extension part is extended toward the printed wiring board at the end of the mounting plate on the printed wiring board side. A mounting plate for fixing the display device by providing a fixing part at the tip of the protruding part, which has a fixing groove into which a pedestal part located on the mounting plate side of the pedestal part and a printed wiring board on this pedestal part are inserted. By fixing the printed wiring board using a support member, the printed wiring board is fixed without the need for a support member, reducing the number of parts for the mounting member, and also reducing the assembly work related to mounting the printed wiring board and the mounting board. In addition to making the work easier and more efficient, the present invention aims to eliminate the possibility of penetrating into the main body of the cooking appliance by supporting the printed wiring board through engagement with the mounting plate.

[Example of idea]

This invention will be explained below based on an embodiment shown in FIGS. 3 to 6. In FIG. 3, reference numeral 1 denotes the main body of a cooking appliance, such as a microwave oven, and a heating chamber (not shown) is provided on the left side of the main body 1. Further, various high frequency oscillation devices (not shown) are arranged on the right side of the main body 1. on the other hand,
A side-opening door body 2 is rotatably supported on the left side of the front side of the main body 1 so as to be able to open and close an opening of a heating chamber (not shown). Note that 3 is a handle provided on the door body 2. Further, an operation panel main body 3 is provided on the front side of the main body 1 adjacent to the door body 2. and,
A window portion 4 is provided on the upper side of the panel surface of the operation panel main body 3, and operation switch portions 5 for various cooking operations are provided on the lower side. Further, on the back side of the operation panel main body 3, as shown in FIG. 4, a display 6 is provided corresponding to the window section 4, and a printed wiring board 7 is provided corresponding to the operation switch section group. . That is, the display 6 and the printed wiring board 7 are adjacent to each other. The printed wiring board 7 is equipped with an electronic component for controlling cooking, and this electronic component is mounted on the printed wiring board 7.
The operation switch section 5... is connected to the high frequency oscillation device and the display 6 through printed wiring formed on the operation switch section 5..., and the operation of the high frequency oscillation device is controlled by controlling the operation of the high frequency oscillation device in response to the operation of the operation switch section 5... The cooking status and the like can be displayed on the display 6.

On the other hand, the mounting structure of the printed wiring board 7, which is the main part of this invention, is shown in detail in FIG.

That is, on the outer peripheral wall 3a of the operation panel main body 3 adjacent to one side in the width direction of the printed wiring board 7, a part of the outer peripheral wall 3a is moved inward corresponding to the corner part in the vertical direction of the printed wiring board 7. Cut and raised parts 8, 8 are provided as a base part cut and bent into an inverted L shape. A printed wiring board 7 is placed on these cut and raised portions 8, 8. In addition, as shown in FIG. 5, the cut-and-beveled portion 8 located on the lower side of the operation panel main body 3 among these cut-and-beveled portions 8, 8 has a plate surface portion constituting the cut-and-beveled portion 8. For example, a bag-shaped holding part 9 with openings on two sides is provided,
The lower corner portion of the printed wiring board 7 is removably held between the holding portion 9 and the cut-and-raised portion 8 . On the other hand, reference numeral 10 denotes a mounting plate for protecting and fixing the display 6, which is disposed above the printed wiring board 7. The display device 6 is mounted on this mounting plate 10. Further, the mounting plate 10 is integrally provided with an extending portion 11 extending toward the PC board 7 at a position corresponding to the cut-and-raised portion 8 on the upper stage side at the end on the printed wiring board 7 side, that is, at the lower end. In addition, a stepped portion 11a corresponding to the set height of the PC board 7 is formed in the extending portion 11. A fixing part 12 is integrally provided at the tip of the extending part 11, as shown in FIG. At 12, the upper corner portion of the printed wiring board 7 and the cut-and-raised portion 8 on the upper stage side that receives the corner portion are removably held by fitting into the fixing groove 12b. Further, the mounting plate 10 is provided with a through hole (not shown) for mounting, for example, on the opposite side to the fixing part 12, and the mounting plate 10 is screwed to the operation panel main body 3 with screws 14 through this through hole. At the same time, the mounting plate 10
The printed wiring board 7 is also fixed.

Therefore, when attaching the printed wiring board 7 to the operation panel main body 3 using the mounting structure configured as described above, first, the part of the printed wiring board 7 on the opposite side from the mounting plate 10, that is, the lower corner part. is inserted between the cut-and-raised portion 8 and the holding portion 9, which are located on the side opposite to the mounting plate 10, that is, on the lower side of the cut-and-raised portions 8, 8 located above and below, and are held therebetween. After that, the mounting plate 1 of the printed wiring board 7 is
The 0 side part, that is, the upper corner part, is attached to the mounting plate 1.
Place it on the cut and raised portion 8 on the upper stage side located on the 0 side. Next, the mounting plate 10 to which the display device 6 was attached in advance
Insert the fixing groove 12b into the upper corner part of the printed wiring board 7 and the cut-and-raised part 8 on the upper stage side,
Thereafter, by screwing the mounting plate 10 to the operation panel main body 3 with the screws 14, the display device 6 and the printed wiring board 7 are fixed together in the form of one-sided support.

In this way, the printed wiring board 7 can be fixed by using the mounting plate 10 of the display 6 as a mounting member for the printed wiring board 7, and there is no need for a support member that involves various problems as in the conventional case. , it is possible to reduce the number of parts and reduce costs. In addition, when assembling the printed wiring board 7, the lower corner part of the printed wiring board 7 is cut and raised at the lower part 8.
and the holding part 9, and placed on the upper corner part and the cut-and-raised part 8 on the upper stage side, and the fixing groove 12 of the fixing part 12 of the mounting plate 10 of the display device 6.
The work is as simple as inserting b into the cut-out portion 8 on the upper side and the upper corner portion of the printed wiring board 7, and at this time, the lower end side of the mounting plate 10 can also be fixed at the same time. Since the number of tasks can be reduced, the work can be done easily and efficiently, and work efficiency can be improved. Moreover, unlike conventional microwave ovens, there is no member such as a support member that goes into the main body 1 of the microwave oven.
without compromising the effective area within.

Further, in the above-described embodiment, this invention is applied to a microwave oven, but this invention can also be applied to other display devices and mounting plates, and even to cooking appliances that include a printed wiring board adjacent to the display device.

[Effect of idea]

As explained above, according to this invention, the printed wiring board can be fixed using the mounting plate for fixing the display, and the number of parts and costs can be reduced. Moreover, when assembling a printed wiring board, one part of the printed wiring board is inserted between one base and the holding part, and the fixing part of the mounting plate is inserted into the other part and the other base. The work is as simple as inserting the fixing groove into the mounting plate, and one end of the mounting plate can also be fixed at the same time, resulting in excellent workability. Moreover, there are no parts that penetrate into the body of the cooker and the effective area is not compromised.

[Brief explanation of drawings]

Fig. 1 is a side view showing the mounting structure of the PC board in a conventional cooker, Fig. 2 is an exploded perspective view showing its detailed structure, and Figs. 3 to 6 show an embodiment of this invention. Figure 3 is an overall perspective view of the cooker.
Figure 4 is a side sectional view showing the mounting structure of the PC board.
FIG. 5 is a perspective view showing the structure of the lower stage side,
FIG. 6 is a perspective view showing the structure of a groove provided in the mounting plate. 3... Operation panel main body, 6... Display unit, 7...
Printed wiring board, 8, 8... cut-and-raised part (pedestal part),
9...Holding part, 10...Mounting plate, 11...Extending part, 12...Fixing part, 12b...Fixing groove.

Claims (1)

[Scope of utility model registration request] In a cooking device in which a mounting plate equipped with an indicator for displaying cooking status, etc., and a printed wiring board equipped with electronic components for controlling cooking are installed adjacent to each other on the back side of the operation panel main body, the above-mentioned method is provided. A base part provided on the back side of the operation panel body and receiving a part of the printed wiring board on the side of the mounting plate and a part on the opposite side of the mounting plate, and a base part located on the side opposite to the mounting plate of the base part. a holding part that is provided on a pedestal part and holds the printed wiring board between it and the pedestal part; and an extension part that extends toward the printed wiring board at an end of the mounting plate on the printed wiring board side. and a pedestal part which is provided with a fixing groove at the tip of the extending part and is located on the mounting plate side of the pedestal part, and a printed wiring board on this pedestal part is fitted into the fixing groove. A cooking utensil characterized by comprising a base portion and a fixing portion for holding a printed wiring board.