JP5402680B2 - Cooker - Google Patents

Description

  The present invention relates to a top plate of a cooking device.

  Conventionally, there is an induction heating cooker as this type of cooking device as shown in FIG. 4 (see, for example, Patent Document 1).

  FIG. 4 shows an exploded perspective view of a main part of a conventional cooking device. As shown in FIG. 4, what is used in the kitchen of a general Japanese home is a so-called three-mouth cooking device having three heating means on the top plate 35, and constitutes the outline of the cooking device. The outer body 31 includes heating means, a control board, and the like (not shown), and 32 is a top unit portion 32 that covers the outer body 31 from above.

  The top unit portion 32 includes a top plate 35, an under frame (holding member) 33 that holds the top plate 35 from the lower surface, and a side frame (frame body) 36 that covers the outer periphery from above the top plate 35. The plate 35 is pressed against a part of the underframe 33 and positioned. The hook portion 37 fixed to the front side portion of the underframe (holding member) 33 with the screw 38 from below is fixed with the screw 39 from the front after the top unit portion 32 is set to the outer body 31.

JP 2004-311338 A

  However, in the conventional configuration described above, in models that operate a capacitance type switch on the top surface of the top plate as in recent years, there are overlapping variations due to dimensional tolerances such as the outer shape of the top plate and the bending position of the printing and under frame. The positional relationship between the underframe and the electrode due to the conductive printing of the top plate deviates from a predetermined distance, and the position of the electrode and the contact terminal provided on the main body deviates, resulting in poor continuity and correct the top unit after assembly. There was a problem that it may be necessary to exchange for a positional relationship. Alternatively, there has been a problem that variation in the capacitance change level occurs due to positional deviation of the electrode portion, and variation in detection performance using the change becomes large.

  The present invention solves the above-mentioned conventional problems, and when the top unit is assembled, it is confirmed that the underframe having a positioning hook to the main body and the electrode by conductive printing of the top plate are at a predetermined distance, An object of the present invention is to provide a heating cooker that can be assembled correctly and ensures a good conduction state by reliable contact between an electrode and a contact terminal by conductive printing, or has improved performance of detecting change in capacitance of the electrode. To do.

In order to solve the above-described conventional problems, the present invention provides a top unit including a top plate and an underframe and a side frame provided with a hook portion for positioning and fixing the top plate from a lower surface to support a main body, The main body provided below the top unit to form an outer shell, a plurality of heating means provided on the main body below the top unit, an electrode portion by conductive printing provided on the lower surface of the top plate, and the electrode portion And a control circuit unit for detecting a change in capacitance of the electrode unit and controlling the operation of the heating means, and the underframe on the lower surface of the top plate. And a heating cooker provided with a marking by conductive printing for confirming that the distance between the electrode and the electrode is within a predetermined range.

Accordingly, it is possible to confirm that the distance between the underframe and the electrode formed by conductive printing on the bottom surface of the top plate is within a predetermined range by marking by conductive printing on the bottom surface of the top plate. Can be reliably aligned with the contact terminal portion provided on the switch, the conduction of the switch using the change in capacitance can be ensured, the reliability can be improved, and the position of the electrode itself Since the accuracy also increases, variation in capacitance change due to positional deviation can be reduced, and detection accuracy can be improved.
In addition, since the positional deviation of the electrode can be confirmed and adjusted before the main body is assembled, loss due to a defective top unit and assembly loss can be reduced.

  The heating cooker according to the present invention is capable of reliably aligning and confirming the position of the electrode on the lower surface of the top plate, and is a switch utilizing improved reliability and change in capacitance due to reliable contact with the contact terminals. And the reliability of the detection function can be improved.

The principal part disassembled perspective view of the heating cooker in Embodiment 1 of this invention The front view of the top unit of the heating cooker in Embodiment 1 of this invention The front view of another top unit plan of the heating cooker in Embodiment 1 of the present invention The main part exploded perspective view of the conventional cooking device

According to a first aspect of the present invention, there is provided a top unit constituted by a top plate, an under frame and a side frame having a hook portion for positioning and fixing the top plate from a lower surface, and an outer shell provided below the top unit. The main body to be formed, a plurality of heating means provided on the main body below the top unit, an electrode portion by conductive printing provided on the lower surface of the top plate, and a signal of the electrode portion transmitted to the control circuit portion And a control circuit part for detecting a change in capacitance of the electrode part and controlling the operation of the heating means, and a distance between the under frame and the electrode is predetermined on the bottom surface of the top plate. The bottom surface of the top plate by making it a heating cooker provided with marking by conductive printing to confirm that it is within the range of The distance between the electrode provided by conductive printing and the underframe provided with the fixing hook portion can be reliably aligned within a predetermined range, and thereby the alignment of the electrode and the contact terminal of the main body can be reliably performed. It is possible to ensure conduction of a switch or the like using the change in electric capacity, and improve reliability. In addition, since the positional accuracy of the electrode itself is increased, the accuracy of detecting a change in capacitance can be improved.
In addition, since the positional deviation of the electrodes can be confirmed before the main body is assembled, loss due to component failure and assembly loss can be reduced.

  According to the second invention, in particular, the marking according to the first invention is provided in parallel at two places with a predetermined distance across the end surface of the underframe, or by forming a circular shape on the end surface of the underframe. The positional relationship can be more accurately grasped by the gap between the marking and the end face of the underframe and the amount of margin, and it is easier to grasp that the distance is within a predetermined distance.

In the third invention, in particular, the marking of the heating cooker according to the first or second invention is provided at a plurality of positions on one side of the top plate, so that not only the distance of the electrode to the underframe but also the inclination and the like are grasped. Thus, the positional accuracy can be further increased, and the reliability of the electrode can be increased.

  In the fourth invention, in particular, by connecting the marking of the third invention by conductive printing, a contact pin for inspection is applied to the top unit, and the presence or absence of conduction is confirmed. Can be automatically inspected to be within a predetermined range.

  In the fifth invention, in particular, the electrode by the conductive printing of any one of the first to fourth inventions, the electrode by the conductive printing of the switch unit used for the operation, and the electrostatic capacitance due to the spilling of the upper surface of the top plate. Two types of electrodes with conductive printing to detect changes, and electrodes to detect the capacitance of the spillover are provided in parallel along the side frame, so that the switch and the like using the change in capacitance can be conducted. It is possible to reliably and improve reliability, and by marking, electrodes can be accurately provided in parallel along the top frame, so it is possible to accurately detect changes in capacitance due to spilling along the frame. can do.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the embodiments.

(Embodiment 1)
FIG. 1 shows a perspective view of a cooking device according to the first embodiment of the present invention, and FIG. 2 shows a front view of a top unit.

  In FIGS. 1 and 2, the top plate 1 is held by an under frame 4 having a hook portion 3 for positioning and fixing to the outer shell body 2 from the lower surface, and the top plate 1 and the under frame 4 are fitted together by a side frame 5. Thus, the top unit 6 is configured. Further, on the lower surface of the top plate 1, there are provided an electrode 7a by conductive printing corresponding to each switch and an electrode 7b by conductive printing for detecting spillage in which the periphery of each heating means 8 is circumferentially arranged. Further, on the lower surface of the top plate 1, a conductive portion is formed in parallel, for example, in a U shape with a distance of about 1 mm so as to straddle the end surface 9 on the front side of the underframe 4 hollowed for the heating means 8 at the center. The marking 10a by the characteristic printing is provided. A plurality of markings 10a are provided on one side. The electrodes 7a and 7b and the marking 10a by these conductive printing are simultaneously printed on the same plate.

  On the other hand, the main body 2 forming the outer shell provided below the top unit 6 has a plurality of heating means 8 and the electrodes 7a and 7b on the lower surface of the top plate 1 so as to oppose each other below the electrodes 7a and 7b. The contact terminals 12 that contact the electrodes 7a and 7b and transmit the signals of the electrodes 7a and 7b to the control circuit 11 and the change in the capacitance of the electrodes 7a and 7b are detected to control the operation of the heating means 8. And a control circuit unit 11.

  The top unit 6 is fixed to the device main body 2 via the hook portion 3 of the under frame 1 and the fixing portion 13 at the rear of the top surface.

  About the cooking-by-heating machine comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.

First, at the time of assembling the top unit 6, by confirming that the U-shaped marking 10a having the distance of the parallel part of the lower surface of the top plate 1 by conductive printing is assembled across the under frame 4 Since the distance between the underframe 4 and the electrodes 7a and 7b formed by conductive printing on the lower surface of the top plate 1 can be confirmed and assembled, it is possible to assemble the electrodes 7a and 7b on the lower surface of the top plate 1 and the main body. Therefore, it is possible to reliably perform alignment with the contact terminal 12, and it is possible to ensure conduction of a switch or the like using a change in capacitance, and to improve reliability. In addition, since the marking 10a is provided at a plurality of positions on the front side of the under frame 1, since the inclination of the top plate 1 and the electrode 7b with respect to the under frame 4 can be confirmed and corrected during assembly, the positional accuracy of the electrode 7b itself is also increased. Thus, variation in capacitance change due to positional deviation can be reduced, and detection accuracy can be improved. In particular, when the electrode 7b for spilling is arranged in parallel with the surrounding side frame 5, the positional relationship and distance between the electrode 7b and the side frame 5 is stabilized within a predetermined range. In this case, the variation due to the positional variation of the electrode 7b can be suppressed to a small level, and therefore the change in capacitance can be accurately detected.

  Moreover, since the positional deviation of the electrodes 7a and 7b can be confirmed and adjusted before the main body 2 is assembled, loss due to a defect of the top unit 6 and assembly loss can be reduced.

  Further, as shown in FIG. 3, even if the marking shape of the present embodiment is circular, by confirming that the circular marking 10b is applied to the end face 9 of the underframe 4, the underframe 4 and the top It can be confirmed that the distance between the electrodes 7a and 7b by the conductive printing on the lower surface of the plate 1 is within a predetermined range, and the electrodes 7a and 7b on the lower surface of the top plate 1 and the contact terminals 12 provided on the main body 2 Therefore, it is possible to reliably perform the alignment, to ensure the conduction of a switch or the like using the change in capacitance, and to improve the reliability.

  Furthermore, as shown in FIG. 3, when the plurality of markings 10 b of the present embodiment are connected by conductive printing, when assembling the top unit 6, contact pins for inspection are formed from a predetermined body on the lower surface of the top unit 6. By applying to each marking 10b connected by conductive printing at an appropriate position, if there is no marking 10b at a predetermined position, the contact pin does not hit, so there is no conduction, and by confirming the presence or absence of conduction between the plurality of markings 10b Whether the marking 10b is at a predetermined position can be automatically confirmed, and it can be automatically inspected that the distance between the electrodes 7a, 7b and the underframe 4 is within a predetermined range.

  As described above, the heating cooker according to the present invention can ensure the alignment and confirmation of the electrode on the lower surface of the top plate, and can improve the reliability of the switch and detection function using the change in capacitance, It can be used in a heating cooker regardless of heat sources such as electricity and gas, and can also be applied to applications such as switches of other devices using changes in the capacitance of electrodes due to conductive printing.

DESCRIPTION OF SYMBOLS 1 Top plate 2 Main body 3 Hook part 4 Under frame 5 Side frame 6 Top unit 7a, 7b Electrode (electrode part)
8 Heating means 9 End face 10, 10a, 10b Marking 11 Control circuit part 12 Contact terminal 13 Fixing part

Claims (5)

A top unit comprising a top plate, an underframe and a side frame provided with a hook portion for positioning and fixing the top plate from the lower surface, and the main body forming an outline provided below the top unit; A plurality of heating means provided on the main body below the top unit; an electrode portion by conductive printing provided on a lower surface of the top plate; a contact terminal portion for transmitting a signal of the electrode portion to a control circuit portion; A control circuit unit that detects a change in capacitance of the electrode unit and controls the operation of the heating unit is provided in the main body, and the distance between the under frame and the electrode is within a predetermined range on the lower surface of the top plate. A heating cooker provided with markings by conductive printing to confirm. 2. The marking by conductive printing provided on the lower surface of the top plate is provided in parallel at two locations across the end face of the under frame with a predetermined distance, or in a circular shape on the end face of the under frame. The heating cooker described in 1. The cooking device according to claim 1 or 2, wherein the marking by conductive printing provided on the lower surface of the top plate is provided at a plurality of locations on one side of the top plate. The cooking device according to claim 3, wherein a plurality of conductive printing markings provided on the lower surface of the top plate are connected by conductive printing. Two types of electrodes are provided on the lower surface of the top plate: conductively printed electrodes for the switch part used for operation, and conductive printed electrodes that detect changes in capacitance due to spillage on the top plate top surface. The heating cooker of any one of Claims 1-4 which provided the electrode to detect in parallel along the side frame.