JPS5913832A - Door mechanism of heating cooker - Google Patents

Abstract

PURPOSE:To prevent the deformation and abrasion of a pusher by a method wherein the interlocking surface of either a door handle or a hook which engages the pusher capable of coverting the rotary motion of the door handle into its linear motion is made to lie in the plane of the linear motion of the pusher. CONSTITUTION:When a handle 7 rotates, the projection 10 of the handle 7 moves as it keeps contact with the semispherical end of the pusher 14 so that the point of contact between the two shifts from (a) to (b). In this case, the contact points (a)-(b) lie always in the plane of the linear motion of the pusher 14 and therefore, the direction of the linear motion of the pusher 14 and the direction A of the operating force acting on the pusher 14 due to the rotation of the handle 7 coincide with each other. Accordingly, no unreasonable force is applied between a pusher guide 15 and the busher 14 so that the breakage and the abrasion of the pusher 14 are prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a door device for a cooking appliance that ensures the opening and closing operation of a door body.

[Technical background of the invention and its problems]

As heating cookers, microwave ovens that cook food by emitting υ high frequency waves using a magnetron, and microwave ovens equipped with a heater inside the heating chamber are widely used. In these heating cookers, a door body is pivotally supported on the front surface so as to be openable and closable.

In the conventional heating cooker 1, the door body 5 has a shaft 6.6 so as to cover the opening 3 of the heating chamber 2 and come into contact with the front plate 4.
It is pivoted so that it can be opened and closed. A handle 7 is provided on the front surface of the door body, and a handle cover 8 is provided on the third part of the handle 7. The inner surface of the handle 1" lure has two support arms" with holes 9a and 9a formed at the ends.
9 and two protrusions 10 and 1θ are provided in a protruding manner.

The handle cover 8 also has rectangular openings 11 facing the support arms 9, 9 and the protrusions 1o, 1o, respectively.
．． 11 and a circular through hole 12° 12 are formed, and the support arm 9
, 9 and the protrusion 10°lθ are adapted to fit together. Next, the support arms 9 and the protrusion 10 are attached to the door body 5.
, 10, and a button which slidably supports a button 14, which converts the rotational movement of the handle 7 into a linear movement, and which is formed into a hemispherical shape at both ends. The shaft guide 15°15 is welded. A handle hinge 16 and a hook hinge member 17, which rotatably support the handle 7 via the support arm 9.9, are still fixed to the door body 5 by screws 18, respectively. The shafts 19.20 protruding from the ends of the handle hinge 16 and the hook hinge member 17 are fitted into the holes 9g and 9a of the support arm 9.9 to rotatably support the handle 7. ing. Further, the hook hinge member 17 is integrally formed with a seven-hook hinge 21.21 in which shafts 21g + 21a are implanted. A locking portion 24 for locking a hook spring 23 biased downward is integrally formed. A locking portion 25 of a hook gelling 23 that urges the lower hook 22 downward is formed integrally with the door body 5.

The operation of the door body 5 constructed as described above will be explained. When the operating portion 7a of the handle 7 is grasped and rotated in the direction of arrow C as shown in FIG. 3, the protrusion 10 presses the button 14. The pusher 14 presses the hook 22 against the elasticity of the hook spring 23, and the hook 22 presses the shirt (2).
1a, the hook portion 22m at the tip is retracted from the locking portion 4a of the front plate portion 4, and the door body 5 becomes openable and closable.

Furthermore, when the in body 5 is pressed in the direction of C, the body 5 moves to the arrow A
Rotate and open as shown. By the way, when the handle 7 is rotated as described above, the protrusion 10 moves from the position shown by the solid line to the position shown by the two-dot chain line while maintaining contact with the gripper 14, as shown in FIG. As a result, the point of contact between the protrusion 10 and the gripper 14 that initially descends is a
Move from to b. However, the roughness 14 of the protrusion 1θ
Since the contact surface with the protrusion 10 is a flat surface, the bushing 14 receives a force in the direction of arrow B, which is different from the direction of its linear movement and is applied directly to the upper surface of the protrusion 10. Therefore, a large force is required to operate the handle 7, which has a large frictional force between the bushing guide 15 and the bushing 14. Additionally, this force in the B direction acts on the bushing 14 using the 0 point as a fulcrum, which causes deformation and wear of the bushing 14, which has the disadvantage of making handle operation uncertain during interlocking movements. Ta. The grip of the grip 14 and the hook 22 is the same in relation to the portion 22b. That is, when the hook 22 rotates from the position shown by the solid line to the position shown by the two-dot chain line as shown in FIG.
had the disadvantage that it would deform and wear when subjected to force in the C direction.

[Purpose of the invention]

This invention aims to provide a door device for a heating cooker that prevents deformation and wear of the button that converts the rotational motion of the handle into linear motion.

[Summary of the invention]

This invention forms hemispherical surfaces at both ends of the bushing that moves linearly when the handle is rotated, and forms an arcuate surface with a large diameter on the member that interlocks with the bushing, so that lateral pressure is applied to the bushing when the handle is rotated. It is designed so that it does not work.

[Embodiments of the invention]

The present invention will be explained below with reference to FIGS. 7 and 21 and 8, in which the same components in FIGS. 5 and 6 are given the same reference numerals. In the figure, reference numeral 14 indicates a semi-circular sphere at both ends of the pusher 14, one end contacts the protrusion 10 of the handle 7, and the other end contacts the gripping portion 22b of the hook 22. It is supposed to be done. Further, arcuate portions 10g and 22c having a larger diameter than the semicircular sphere of the gusher 14 are formed on the upper surface of the protrusion 10 and the crumple support portion 22b.

When the handle 7 of the door body 5 configured as described above is rotated, the protrusion 10 moves from the position shown by the solid line to the position shown by the two-dot chain line while maintaining contact with the button 14, as shown in FIG. , the contact point moves from a to b. On this occasion,
Since the contact point is located on the linear motion plane of the bushing 14,
The direction of the linear movement of the pusher 14 and the direction A of the force acting on the pusher 14 by the handle 7 are 41 directions. Therefore, unnecessary M interference does not occur between the butcher guide 15 and the nozzle 14, and the handle operation becomes easier.

In addition, since the shank 14 only receives interlocking force in the linear direction, it will not be deformed due to shearing force. It also reduces wear and prevents rattling even after long periods of use. Gutsusha 14 and Gutsusha receiver are part 22
The same applies to the relationship with b. That is, hook 2
When the part 22b moves to the position shown by the octopus line, the bushing holder 20 moves from the contact point to point d, but the contact point d is not located on the linear movement plane of the bushing 14.
4 receives only interlocking force in the linear direction. Further, since the hook 22 is provided with a hook spring 23, the bushing 14 receives a force in the same direction as the direction of linear movement.

〔Effect of the invention〕

As explained above, in the present invention, the action surface of the bushing and at least one of the handle and the hook that interlocks with the bushing is positioned t on the linear motion surface of the bushing.
-i is positioned so that they are in contact with each other, so that the direction of the linear movement of the bushing always matches the direction of the interlocking force, making it easier to operate the handle. In addition, wear and deformation of the bushing and bushing guide are prevented, ensuring reliable operation over a long period of time and preventing radio wave leakage.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing a general heating cooker, Fig. 2 is an exploded perspective view showing a door body of a conventional heating cooker, Fig. 3 is a cross-sectional side view showing the main parts of the door body, and Fig. 4 is a perspective view showing a conventional heating cooker. The figure is also a longitudinal side view showing the main part of the door body, Figures 5 and 6 are side views showing the main part of the component that converts the rotation of the door body into linear motion, and Figures 81! Fig. 8 shows an embodiment of the present invention, Fig. 7 is a side view showing the direction of interlocking force as the relative position between the handle and the bushing changes, and Fig. 8 similarly shows the direction of the interlocking force as the relative position between the bushing and the hook changes. It is a side view showing the direction of interlocking force. 1...Heating cooker, 4...Front plate part, 5...Door body,
7... Handle, 10a... Arc part, 14.14.
... Gutsusha, 1&, 15- Butsusha guide, 22
c...Circular arc part, 23.23...Hook spring. Spear 4 figure $5 figure

Claims (2)

[Claims] (1) A handle rotatably supported on the front of the door that covers the area around the front plate of the heating cooker and is pivotally supported so that it can be opened and closed, and guided by a plurality of button guides provided on the front of the door. It is rotatably supported by a button that moves linearly and a hook hinge member fixed to the door body, and in conjunction with the linear expansion movement of the button, the hook formed at the tip rotates, and the heating cooker is rotated. It consists of a hook that engages and disengages from the front plate, and a hook spring that biases the hook of the hook so that it always locks on the front plate of the cooking device. 1. A door device for a heating cooker that unlocks the door, characterized in that an interlocking surface of either the handle or the hook that comes into contact with the pusher is located approximately on a linear movement surface of the pusher. (2) The interlocking surface of the button is formed in a hemispherical shape, and the interlocking surface of the handle and the hook is formed with an arcuate portion having a larger diameter than the interlocking surface of the button. ) The door device of the heating cooker described in item 2.