JPS594587Y2 - electric toaster heater - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to a heater for an electric toaster.

The heater of an electric toaster generally has the following characteristics, as shown in Figure 1.
A mica plate 1 having a rectangular shape with a width of a, and this mica plate 1
A clip 2 that holds four (or two) sheets with the upper and lower ends of the mica sheet 1 on the same plane as the plane of the mica sheet 1 at a required equal interval, and a heating wire 3 that is wound around the four mica sheets 1. This is one set, and three sets (2
In the case of a standard electric toaster) is assembled into the electric toaster main body (not shown), and the heating wire 3 is connected to the cord of the plug via a lead wire.

In the heater of such an electric toaster, the bread must be toasted uniformly without any unevenness, so the distance between the mica plates 1 around which the heating wires 3 are wound cannot be made too large.

The distance between the mica plates 1 is approximately determined by the width a of the mica plates 1 and the size of the pan, that is, the size of the entire heater.

For example, if there are four mica plates 1 (in rare cases, there may be two mica plates 1).

), the width a of the mica plates 1 is approximately 25 mm, the distance between the mica plates 1 is approximately 7.5 mm, and these dimensions are approximately 1 mm in width.
The length is approximately 20 mm, and the length is approximately 130 mm, which is the same as the overall dimensions of the heater.

Therefore, the amount (size) of the mica plate used is also approximately constant.

In view of the above-mentioned points, the present invention aims to provide a heater that saves the amount of mica plate used, is the same size as a conventional heater, and can bake almost the same bread.

The inventor of the present invention first focused on the fact that the heat of the heater of an electric toaster increases, and when the left and right edges of a rectangular mica plate are shaped into uneven shapes, and when a heating wire is wrapped around this mica plate, It was determined that the heat distribution of this uneven mica plate and the heat distribution of the rectangular mica plate are almost the same.

In other words, the heat of the heating wire wrapped around the lower convex part of the uneven mica plate rises into the space of the upper concave part and heats up, and as a result, the heat distribution in the concave part of the uneven mica plate is compensated for. The heat distribution becomes uniform as a whole, and is almost the same as the heat distribution in the rectangular shape.

Therefore, the inventor of the present invention formed the left and right edges of the mica plate to be uneven to the extent that the strength would not become brittle, and wound the mica plate with heating wires, making the mica plates spaced apart to the extent that uneven heating would not occur. The inventors have devised that if mica is supported at a temperature that is equal to the baking performance of conventional heaters, the amount of mica can be saved significantly.

Hereinafter, one embodiment of the heater for an electric toaster according to the present invention will be described with reference to FIGS. 2 to 5.

The heater of the electric toaster of the present invention in this embodiment is as follows:
Clip 2, heating wire 3, mica plate 4, and mica 5
and eyelet 6.

The mica board 4 is a rectangular mica board with a width of C, and the left and right edges thereof are formed into uneven shapes.

That is, as shown in the board in FIG. 5a, rectangular convex portions 7 with a width d are provided at regular intervals on the right side edge with a width C as a reference, and the same width C is provided on the right side edge. By providing a rectangular convex portion 7 with a width d for each of the rectangular convex portions 7, convex portions 7 and concave portions 8 are alternately formed on the left and right side edges of a rectangular mica plate having a width C.

The upper and lower ends of the four mica plates 4 are held by the clips 2 on the same plane as the mica plate 4 at required equal intervals, and the mica plates 4 are held at both the left and right ends of the mica plates 4. The mica 5 is also supported on the lower part of the plate 4 by the lower clip 2, and the heating wire 3 is wound around the four mica plates 4, tightly at the lower part of the mica plate 4 and loosely at the upper part of the mica plate 4. Both ends of the heating wire 3 are fixed at the mica 5 with eyelets 6.

Three sets of the heaters of the electric toaster of the present invention are incorporated into the electric toaster body (not shown), and the heating wire 3 is connected to the eyelet 6 through the lead wire. and connect it to the cord of the plug.

The heater of the electric toaster of the present invention in this embodiment is as follows:
With the above configuration, when the heating wire 3 is energized to generate heat, the heat of the heating wire 3 wound around the lower convex portion 7 of the mica plate 4 is transferred to the space of the upper concave portion 8. As a result, the heat distribution becomes uniform as a whole due to the complementary effect of heat in the recess 7 of the mica plate 4 (the hatched part in Fig. 4), and the strip shape shown in Fig. 4 a is formed. The heat distribution is almost the same as that of

From the above, even if the amount of mica plate 4 used is reduced, it is possible to obtain almost the same bread baking effect as the conventional heater, and there is no problem in terms of strength.

Below, the amount of mica board saved is calculated using an electric toaster (
3), we will give specific numbers and discuss them.

First, in the case of the conventional mica board 1 having a rectangular shape with a width of 25 mm and a length of 130 mm, the area of the mica board is 25 mm width x 130 mm length x 4 sheets x 3 sets = 390
It becomes am2.

On the other hand, the uneven mica board 4 of the present invention has a width of 20 m, a length of 130 mm, and a protrusion 7 having a width of 5 mm. The area of the mica board in the case of the resulting mica board 4 is: width 20 mm x length, 130 mm x 4 sheets x 3 sets =
312 cm”, the difference is 390 am2-31
2 cm' = 78 am2, and the mica plate is 78
CII! 2. You can save about one-fifth.

Further, as a result of various tests, the inventor of the present invention found that the width is 15 mm, the length is 130 mm, and the width of the convex portion is 5 m, as shown in Figure 4C.
It has been found that when four mica plates 40 having a convex-concave shape of m are used, bread is baked evenly without any uneven baking.

In this case, the area of mica board used is: Width 15 mm x Height 130 mm x 4 sheets x 3 sets - 23
4 am2, the difference from the conventional one is 390 am”
-234 cm" = 156 cm2, and it is possible to save 156 cm" of mica board by 40%.

Figures 5a, 1) and 5c are explanatory diagrams showing mica plates, in which a is a rectangular uneven mica plate 4, b is a zigzag uneven mica plate 41. C is a mica plate 42 having wavy irregularities.

The shape of this unevenness is not limited to the above,
It may be of any shape in consideration of strength.

As is clear from the above examples, the electric toaster heater of the present invention can save a large amount of mica plates, and even if the mica plates are saved, the same baked clay effect as before can be obtained. In addition to this, there are also advantages such as not causing problems regarding the strength of the mica plate.

Note that, as a matter of course, the electric toaster heater of the present invention is not limited to the above-mentioned embodiments.

[Brief explanation of drawings]

FIG. 1 is a front view of a conventional electric toaster heater. 2 to 5 show an embodiment of the electric toaster heater according to the present invention, FIG. 2 is a front view, FIG. 3 is a side view,
FIG. 4a is an explanatory diagram showing the heat distribution of a conventional mica board, FIG. 4C is an explanatory diagram showing the heat distribution of the mica board of the present invention, and FIG. B and C are explanatory diagrams showing the cutting of mica boards. 2...Clip, 3...Heating wire, 4.
40.41゜42・・・Mica board.

Claims (1)

[Scope of utility model registration request] In a heater for an electric toaster, which includes a plate-shaped mica plate, a carrier that supports a plurality of the mica plates on the same plane at required intervals, and a heating wire wound around the plurality of mica plates. . A heater for an electric toaster, characterized in that adjacent edges of the plurality of mica plates are shaped to have an uneven shape.