JPS6142492Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a rice cooker used in general households.

A conventional rice cooker had a configuration as shown in FIG. That is, in Figure 1, 1 is a pot, 2
3 is a lid which is rotatably attached to the outside of the main body 2 and opens and closes the opening of the pot 1; 4 and 5 are bushes; 6 is an electric wire; 7 is the above-mentioned A heat shield press plate 8 located in the opening at the bottom of the outer body 2 and having an inverted dish shape and containing a control circuit board, etc., is mounted on the heat shield press plate 7 at a constant interval. It is a heat insulating press board.

It is stipulated in the Electrical Regulation Law to ensure the insulation distance of the electric wire 6, and it is also stipulated that there is no risk of electric shock for non-current-carrying metal parts. If the coating comes into contact multiple times and the surface of the wire touches the metal part, current will flow outside the main body, which is dangerous.
Alternatively, the dangerous edges on the end face of the resin are curved as shown in Figure 2, or rubber or resin bushings 4 and 5 are inserted to protect the wire 6, so as not to damage the wire sheathing. . However, inserting the bushes 4 and 5 is extremely difficult. In other words, the grooves of the large-diameter bushes 4 and 5 must be inserted into the small holes 7' and 8', which requires the skill of the operator. Since the large and small holes 7' and 8' have dangerous edges of the metal plate or resin, there is a risk of injury such as cutting fingers. In addition, since the work of inserting the bushes 4 and 5 takes time, there is a problem in that it increases the process time.

Further, the heat shield press plate 7 and the heat insulation press plate 8 are fixed to each other by inserting the tips of stepped claws 7a formed by cutting upward into the heat shield press plate 7 into claw insertion holes 8a provided in the heat insulation press plate 8. However, since the pawl insertion holes 8a are simply provided in the flat part of the heat insulating press plate 8, water may enter through the pawl insertion holes 8a and be blocked. There is also a problem in that the water resistance of the control circuit board and the like housed inside the heat-insulating press plate 7 cannot be ensured because it gets inside the heat-insulating press plate 7.

The present invention is intended to solve the above problems, improve workability, eliminate dangerous edges, and reliably prevent water from entering control circuit boards, etc.

An embodiment of the present invention will be described below with reference to FIGS. 3 and 4. In the figure, the heat insulating press board 8 and the heat insulating press board 7 have claw insertion holes provided in the heat insulating press board 8 at the tips of a plurality of stepped claws 7a formed by cutting upward on the heat insulating press board 7. 8a and is fixed by twisting its tip.

Also, wire passing holes 9 provided in the heat insulating press plate 8
The diameter is smaller than the diameter of the electric wire passage wall-mounted hole 10 provided in the heat shield press plate 7. That is, the wire passing hole 9 has a diameter of 20 mm, and the wire passing hole 10 has a diameter of 30 mm.

Due to this dimensional relationship, the tip 10a of the wire passing wall hole 10 of the heat insulating press plate 7 has a metal edge, but since the wire passing hole 9 of the heat insulating press plate 8 is small, the wire does not come into contact with the metal edge. There will be nothing left to do. Further, since a sufficient curved portion can be secured at the contact portion of the electric wire by metal press working, the electric wire sheathing will not be torn.

Further, since an air layer is formed between the heat insulating press plate 8 and the heat shield press plate 7, when an electric circuit is inserted into the recessed portion of the heat shield press plate 7, it is easy to keep the electrical circuit within the heat-resistant temperature range.

Further, in the vicinity of the pawl insertion hole 8 of the heat insulating press plate 8, a draining protrusion 11 is provided which is one step higher than the surrounding area, so that the tip of the stepped pawl 7a is inserted into the pawl insertion hole 8a. It is possible to prevent the infiltration of water.

As described above, according to the present invention, the tips of the stepped pawls formed by cutting upward on the heat insulation press plate are inserted into the pawl insertion holes provided in the heat insulation press plate and deformed. In addition to fixing the heat insulating press board on the press board, water draining protrusions are provided in the vicinity of the claw insertion holes of the heat insulating press board, which are higher than the surrounding area, so that water flows from the claw insertion holes of the heat insulating press board to the heat shield press. It will no longer penetrate into the board,
As a result, it is possible to ensure the water resistance of the control circuit board, etc. housed inside the heat insulating press board, and the diameter of the wire passing hole provided in the heat insulating press board can be adjusted to the diameter of the wire passing hole provided in the heat insulating press board. Since the diameter is smaller than the diameter of the hole in the wall, there is no chance of the wire sheathing being torn when the wire passes through it, and as a result, there is no need to insert a bushing as in the past, improving work efficiency. It is something that can be measured.

[Brief explanation of drawings]

Fig. 1 is a sectional view of a conventional rice cooker, Fig. 2 is an exploded perspective view of a part of the same rice cooker, Fig. 3 is a perspective view of essential parts of a rice cooker showing an embodiment of the present invention, Fig. 4 is a sectional view of the same main part. 2... Outer body, 6... Electric wire, 7... Heat shield press board, 7a... Stepped claw, 8... Heat insulating press board,
8a...Claw insertion hole, 9...Wire passing hole, 10...
Wire passage hole in the wall, 11...Draining protrusion.

Claims (1)

[Scope of utility model registration request] The outside of the main body has an opening at the bottom, and a heat shield press plate located in the opening and has an inverted dish shape and houses a control circuit board, etc. inside, and a heat shield press plate that is spaced apart at a constant interval on the heat shield press plate. and a heat insulating press plate that is attached to the heat insulating press plate, a plurality of stepped claws are formed by cutting upwards on the heat insulating press plate, and the tips of the stepped claws are fitted into the heat insulating press plate. By inserting and deforming the tips of the stepped pawls into the pawl insertion holes, the heat insulating press plate is fixed on the heat insulating press plate, and the pawl insertion holes of the heat insulating press plate are fixed. A drainage protrusion is provided nearby that is one step higher than the surrounding area, and the diameter of the wire passage hole provided in the heat insulation press plate is made smaller than the diameter of the wire passage hole provided in the heat insulation press plate. rice cooker.