JPH0530452B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION FIELD OF INDUSTRIAL APPLICATION The present invention relates to an electric cooking device, and particularly to an improvement in a hinge portion used for opening and closing the lid.

BACKGROUND ART The hinge used to open and close the lid of a conventional electric cooking appliance has a structure as shown in FIG. 4, and the cross-sectional shape of the hinge shaft is circular. In FIG. 4, the hinge shaft 12 provided inside the hinge part 11 has a circular cross-sectional shape, and when the lid is closed,
A lead wire 13 that electrically connects the lid and the cooker body extends linearly almost in contact with the hinge shaft 12, and is led to the lid through the insertion hole 11a of the hinge 11.

Problems to be Solved by the Invention However, as shown in FIG. 4, the lead wire 13 passes through the hinge portion 11 and reaches the insertion hole 11a when the lid is closed.
Even though the shape of the lead wire 13 of the contact portion 13a with the hinge shaft 12 is maintained in a substantially straight shape when the contact portion 13a contacts the hinge shaft 12, when the lid is opened, the lead wire 13 is bent as shown in FIG. When contacting the hinge shaft 12, the shape of the contact portion 13a and the lead wire 13 is such that the lead wire 13 is bent along the outer periphery of the hinge shaft 12, so that the bending angle becomes large. Therefore, there has been a problem in that the lead wire 13 is broken at or near the contact portion 13a with the hinge shaft 12 due to long-term opening and closing use.

The present invention solves the above problems by reducing the bending angle of the lead wire at the contact portion with the hinge shaft even when the lid is opened. It is an object of the present invention to provide an electric cooking appliance that can prevent breakage of lead wires.

Means for Solving the Problems In order to solve the above problems, the present invention provides that the cross-sectional shape of the portion between the bearings of the hinge shaft provided inside the hinge portion is made into an elliptical shape or a shape similar to this, and the lid portion When the bending angle of the lead wire, which is bent in conjunction with opening and closing of the hinge shaft, reaches a maximum, the lead wire is configured to contact a circular arc portion corresponding to the short axis of the hinge shaft.

Effect With the above configuration, as the lid is opened from when the lid is closed, the hinge shaft to which the lid is fixed simultaneously rotates, and the curvature of the contact portion of the lead wire with the hinge shaft also increases. Since the lead wire sometimes comes into contact with the arc portion corresponding to the short axis of the hinge shaft, large bending of the lead wire is suppressed. As a result, even if the lid portion is repeatedly opened and closed, breakage of the lead wire at or near the portion where the lead wire contacts the hinge shaft can be prevented.

Embodiment An embodiment of the present invention will be described below based on the drawings.

FIG. 1 shows a longitudinal sectional view of a jar rice cooker which is an embodiment of the present invention. In FIG. 1, reference numeral 1 denotes a rice cooker body, which is a rice cooker body, and this body 1 has a hinge part 2 on one side of the upper part, and a hinge shaft 3 is rotatably provided inside this hinge part 2. A lid portion 4 is fixed to the hinge shaft 3 and is configured to be openable and closable. The electronic component device 5 of the main body 1 and the electronic component device 6 of the lid portion are connected by a lead wire 7 that passes through the inside of the hinge portion 2.

As shown in FIG. 2, the hinge shaft 3 has an elliptical cross-sectional shape at the portion between the bearings, and is arranged so that its long axis direction is almost horizontal when the lid is closed. The contact portion 7a with the hinge shaft 3
The lead wire 7 extends in a straight line almost in contact with the arc portion corresponding to the long axis direction of the hinge part 2, and the lead wire 7
It is led to the electronic component device 6 of the lid part 4 through.

When the lid is opened, the direction in which the lead wire 7 extends is the lid portion 4.
is displaced along with the movement of the hinge shaft 3 of the lead wire 7.
Although the curvature of the contact portion 7a tends to increase, since the hinge shaft 3 also rotates together with the lid 4, the lead wire 7 is rotated in a circular arc portion corresponding to the short axis direction of the hinge shaft 3, as shown in FIG. come into contact.
Therefore, when the lid portion 4 is completely open and the lead wire 7 is bent at its maximum angle, the contact portion 7a of the lead wire 7 with the hinge shaft 3 is the part of the hinge shaft 3 with the gentlest curve. Since the lead wire 7 contacts a circular arc portion corresponding to the minor axis direction of a certain hinge shaft 3, the bending of the contact portion 7a of the lead wire 7 with the hinge shaft 3 is suppressed compared to the case of a conventional circular hinge shaft. Become. Therefore, even if the lid portion 4 is repeatedly opened and closed, the lead wire 7 will not come into contact with the hinge shaft 3 and break.

Note that the cross-sectional shape of the hinge shaft 3 is not limited to an ellipse, but may be an oval.

Effects of the Invention As described above, according to the present invention, since the cross-sectional shape of the hinge shaft is configured to be an ellipse or a shape similar to this, it is possible to reduce the bending angle of the lead wire in contact with the hinge shaft when the lid is opened. This prevents the lead wire from breaking even if the lid is repeatedly opened and closed.
Electrical connection between the electronic components inside the lid and the electronic components inside the main body can be completely established.

[Brief explanation of drawings]

Fig. 1 is a longitudinal cross-sectional view of an electric cooker showing an embodiment of the present invention, Fig. 2 is an enlarged longitudinal cross-sectional view of the hinge portion of the electric cooker when the lid is closed, and Fig. 3 is a longitudinal cross-sectional view of the electric cooker. FIGS. 4 and 5 are enlarged longitudinal cross-sectional views of the hinge portion when the lid is opened, and FIGS. 4 and 5 are enlarged longitudinal cross-sectional views of the hinge portion when the lid is closed and when the lid is opened in the conventional example. 1...Rice cooker main body (cooker main body), 2...Hinge part, 2a...Insertion hole, 3...Hinge shaft, 4...
Lid part, 7...Lead wire, 7a...Contact part.

Claims (1)

[Claims] 1 A cooking device main body, a hinge part provided on one side of the upper part of the main body, a lid part that can be opened and closed fixed to a hinge shaft in the hinge part, and a device of the main body and the lid part that is inserted through the hinge part. The cross-sectional shape of the portion between the bearings of the hinge shaft is made into an ellipse or a shape similar to the ellipse, and the lead wire is bent in conjunction with opening and closing of the lid. The electric cooking appliance is configured such that the lead wire contacts an arcuate portion corresponding to the minor axis of the hinge shaft when the bending angle is maximum.