JPS61154627A - Cooker - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION FIELD OF INDUSTRIAL APPLICATION This invention relates to a cooking utensil for general household use, particularly to a mechanical and electrical connection mechanism between a body, a lower frame, and a bottom plate.

BACKGROUND OF THE INVENTION Conventionally, this type of cooking utensil has generally had a body, a lower frame, and a bottom plate all made of metal. In recent years, cooking appliances that automatically control cooking procedures using microcomputers have become popular, and more and more appliances are holding and storing their printed circuit boards in their lower frames. With this structure, the shape of the lower frame becomes complicated, and it is no longer possible to form it by drawing metal, so injection molding using resin has come to be performed. Additionally, because of this configuration, it has become common to use metal fixtures to connect the body and the lower frame. (For example, Japanese Utility Model Application Publication No. 59-45036) Problems to be Solved by the Invention However, in such a connection mechanism, since the lower frame is made of resin, the body and the bottom plate are electrically insulated. 0 The first problem is that when a static electricity test is performed on each part by placing it on a conductor, the static electricity generated and applied when the cooker is operated by the user is imaginary. Most of the static electricity reaches the body. However, because the body is a considerable distance from the conductor placed under the cookware itself, a fairly high voltage is required to create an arc between the body and the conductor. Therefore, the static electricity accumulated on the body flies to the printed circuit board in the lower frame before flying to the conductor below.
A high voltage is applied to the microcomputer on the same printed circuit board, destroying it, causing abnormalities such as abnormal cooking and continuous energization of the heater.

The second problem is that it is legally required to conduct an insulation test on the power supply wire and each part, but when performing this insulation test, the body and bottom plate are electrically insulated, so It is necessary to conduct a test. Generally, the surface of the body is often coated with ink, and this ink is an insulator, so insulation tests cannot be performed without removing this coating. However, this cannot actually be done without damaging the appearance. In addition, tests had to be performed on each body and bottom plate, which required a lot of man-hours.

The present invention solves these conventional problems and eliminates the inconvenience caused to the control unit due to static electricity.

Means to Solve the Problem In order to solve this problem, the present invention fixes the body with one end of the fixture and makes it contact with the back surface of the body (the surface without ink coating), and measures the bottom frame with the other end. It is something to do.

Function: With this configuration, the body and bottom frame are mechanically connected, and at the same time, the body and bottom plate are electrically connected, and when an electrostatic test is performed on each part by placing the cookware body on a conductor, The static electricity applied to each part passes through the body and reaches the bottom plate. In this configuration, the bottom plate is close to the conductor placed under the cookware main body, and an arc will strike between them at a low voltage, so arc will not strike the printed circuit board. Even if the bottom plate and the conductor are far apart, the bottom plate can be easily brought closer to the conductor by bending the bottom plate. on the other hand,
Even when testing the insulation of the power supply wires and various parts, only the bottom plate needs to be tested, which not only eliminates the need to remove the ink coating from the body, but also reduces the number of tests and man-hours.

Embodiments Hereinafter, embodiments of the present invention will be described with reference to FIGS. 1 and 2. In FIG. 2, reference numeral 11 constitutes the outer frame of the main body, and is a cylindrical body made by bending a thin metal plate and having both end surfaces curled; 12, an annular upper frame forming the upper end of the outer frame of the main body; 13 is a bottomed cylindrical inner frame formed by drawing a thin metal plate whose upper end is fixed to the upper frame 12 and is housed in the body 11; 14 is a cast-in heater placed on the upper surface of the inner bottom of the inner frame 13; 16; 16 is a heat-insulating outer lid that covers the upper opening of the pot 16; 17 is a lower end of the outer frame of the main body; , a lower frame made of resin with an opening in the center, 18 is an abbreviated-shaped fixture that has a fixed part with the lower frame 17 at one end and a connecting part with the body 11 at the other end, and the fixed part is U-shaped. It is bent in the shape of
It is fitted into a holding part with a tapered surface on one side provided at the bottom of the lower frame, and is fixed with screws or the like. The tip of the connecting part is bent at an acute angle and contacts the curled part at the lower end of the body 11, and by tightening the fixed part with a screw etc.
By elastically deforming the fitting 18 into the tapered surface, the connecting portion comes into pressure contact. Reference numeral 19 denotes a metal bottom plate that covers the opening at the lower center of the lower frame 17, and is fixed together with the mounting tool 18 with screws. Therefore, the body 11 and the lower frame 17 are mechanically fixed, and the body 11 and the bottom plate 19 are electrically connected.

A part of the bottom plate 19 is still folded back and extended downward to fit the legs.

With this configuration, the body 1-1 and the bottom plate 19 are electrically connected, and the folded portion of the bottom plate 19 and the bottom surface of the main body are close to each other, so that static electricity applied to each part of the main body is transferred to the body 11.
Since the low voltage easily flows through the bottom plate 19 to the conductor on the bottom of the main body, the microcomputer etc. on the printed circuit board will not be destroyed, and there is no need to perform an insulation test on the body 11.

Effects of the Invention As described above, according to the present invention, the mounting tool establishes a mechanical connection between the body and the lower frame and also establishes electrical continuity, thereby firmly fixing the body and the lower frame and making it easier to use. The static electricity generated and applied when operated by a person does not destroy the microcomputer on the printed circuit board that controls cooking, making it a safe cooking utensil.
This reduces the number of inspection steps and provides cheaper cooking utensils.

[Brief explanation of drawings]

FIG. 1 is an enlarged sectional view of a main part of a cooking utensil according to an embodiment of the present invention, and FIG. 2 is a partially cutaway side view of the same cooking utensil. 11...Body, 12...Top frame, 13
...mark/inner frame, 14... heater, 15...
... Pot, 16 ... Outer lid, 17 ... Lower frame, 18 ... Fixture, 19 ... Bottom plate. Figure 1 U-1-Hotel t'r-m-Bottom frame 18''''-Dimension tool

Claims (1)

[Claims] A cylindrical body formed by bending a thin metal plate and forming an outer frame of the main body; an annular upper frame forming the upper end surface of the outer frame; and a bottomed cylindrical inner frame housed in the body. , a heater provided in the inner frame, a pot removably housed in the inner frame, an outer lid that covers the upper opening of the pot, and a resin lower frame that covers the lower opening of the outer frame. , comprising a substantially L-shaped metal fitting that attaches the lower frame to the body, and a metal bottom plate that covers the central opening of the lower frame, and the body and the bottom plate are connected to each other by the fitting. Cookware with electrical short circuit.