JPS6325447Y2 - - Google Patents

Description

[Detailed explanation of the idea] (b) Industrial application fields The present invention relates to a microwave oven.

(b) Prior art This type of conventional microwave oven is equipped with a door that opens and closes the front opening of the heating chamber located inside the microwave oven body, and an engaging pawl that is swingably attached to the door. The door is held closed by engaging with a stopper located on the side of the microwave oven body.
Further, an opening mechanism is provided for releasing the engagement state between the engaging pawl and the stopper to open the door. That is, there are provided an operating section movably disposed on the handle of the door, and a linking means disposed within the door for engaging and disengaging the engaging pawl from the stopper by operating the operating section.

However, in such a microwave oven, the number of parts increases and workability deteriorates, resulting in high costs, and the door structure becomes complicated. There are drawbacks such as the fact that the size of the yoke is limited and a sufficient yoke effect cannot be achieved.

(c) Purpose of the invention The purpose of the invention is to reduce the number of parts to suppress high costs, and to simplify the door structure so that the chiyoke effect can be fully exhibited.

(d) Structure of the invention The structure of the invention includes a heating chamber disposed inside the microwave oven body for storing food, a door rotatably supported on the microwave oven body and opening and closing the front opening of the heating chamber, and the door. a fixed handle integrally molded on the cover of the microwave oven, a stopper disposed on the side of the microwave oven body and having an engaging pawl guide surface, and a stopper that is swingably attached to the door and guided by the engaging pawl guide surface when the door is closed. An engaging pawl that engages with the stopper and is formed in a dogleg shape with an obtuse angle on the side facing the stopper; an urging force that urges the engaging pawl in a direction in which the engaging pawl engages with the stopper; have the means.

(e) Examples A microwave oven according to an embodiment of the present invention will be described below.

In FIG. 1, 1 is the main body of the microwave oven, and 2 is a door that opens and closes the front opening of a heating chamber (not shown) disposed inside the main body. It is pivoted for free movement. 3
4 is a fixed handle, and 4 is an operating section.

FIG. 2 shows the specific structure of the door 2, in which 5 is a door body having a tie-yoke structure, 6 is a front door panel, and 7 is screwed to the door body 5 to fix the panel 6 to the door body 5. This is a frame-shaped resin door cover, and the handle 3 is integrally molded with the cover.

FIG. 3 shows the main structure of the door 2 when it is closed.
Reference numeral 8 denotes an engaging pawl rotatably supported on the door 2 by a support shaft 9, and the engaging pawl is formed in a dogleg shape with an obtuse angle θ on the side (lower side) facing a stopper, which will be described later. ing. Reference numeral 10 denotes a biasing means for urging the engaging claw 8 clockwise, that is, a spring; 11 is a hole drilled in the inner surface of the door 2 through which the engaging claw 8 is inserted; The rotation range of the claw 8 is limited. 12 is a front plate 13 of the main body 1 corresponding to the engaging claw 8;
14 is a switch mount provided near the insertion hole, and 15 is a switch mount located at a position facing the insertion hole 12. A stopper is integrally molded with 14 and engages with the engaging pawl 8, and the stopper has an inclined surface 16 as an engaging pawl guide surface that slopes from the lower end of the insertion hole 12 toward the upper right. Reference numeral 17 denotes a switch lever which is rotatably supported on a support shaft 18 and rotates clockwise when the engaging claw 8 is pressed by the engaging claw 8 when the engaging claw 8 engages with the stopper 15; It is placed in a position that cannot be seen directly even when viewed from the outside, as indicated by the dashed-dotted line a. Reference numeral 19 indicates the lever 17 that is activated when the lever 17 is rotated clockwise.
This is a normally open type door switch that is turned on when the switch is turned on.

Next, the operation of the above microwave oven will be explained. door 2
In the open state, the engaging claw 8 comes into contact with the lower end of the hole 11, and its rotation in the clockwise direction is restricted. At this time, the tip 8a of the engaging claw 8 is located above the horizontal line passing through point A of the inclined surface 16 of the stopper 15.

Therefore, when the door 2 is moved in the closing direction, that is, in the right direction (FIG. 3) by holding the handle 3 in order to close the door 2, the tip 8a of the engaging claw 8 slides along the inclined surface 16. As a result, the engaging claw 8 rotates counterclockwise against the force of the spring 10. When the tip 8a of the engaging claw 8 crosses the point B of the inclined surface 16, the engaging claw 8
is rotated clockwise by a spring force of 10, and the stopper 1
5, so that the door 2 is kept closed. Furthermore, at this time, the switch lever 17 is rotated and the door switch 19 is turned on. Thereafter, a desired heating time is set using the operating section 4 and a heating start operation is performed, thereby executing the desired cooking.

Next, in order to open the door 2, a force is applied to the handle 3 in the door opening direction, that is, in the left direction (FIG. 3). In this case, since the engaging claw 8 has a dogleg shape with an obtuse angle θ on the side facing the stopper 15, the portion of the engaging claw 8 from near point C on the side facing the stopper 15 to the tip 8a is Slide the stopper 15 at point B,
Therefore, the engaging claw 8 rotates counterclockwise. When the tip 8a of the engaging pawl 8 crosses point B of the stopper 15 and reaches the inclined surface 16 side, the engaging pawl 8 disengages from the stopper 15 and moves clockwise until it comes into contact with the lower end of the hole 11. The door 2 is rotated and the door 2 is opened. Incidentally, the door switch 19 is of course turned off at the time of the engagement and disengagement.

(f) Effects of the device As is clear from the above explanation, according to the present invention, simply by forming the side of the engaging pawl facing the stopper into an obtuse dogleg shape, the connection between the engaging pawl and the stopper is improved. Since a special opening mechanism for releasing the engaged state and opening the door is not required, the number of door parts is reduced, work efficiency is improved, and cost increases can be suppressed. Furthermore, the door handle does not require an operating part of the opening mechanism, and therefore, by integrally molding it with the door cover, the number of parts of the door can be further reduced, and cost increases can be suppressed. Furthermore, since the door structure can be simplified, even if the door has a wall structure, a sufficient wall size can be ensured, and microwave leakage can be reliably suppressed.

[Brief explanation of the drawing]

Fig. 1 is an external perspective view of a microwave oven according to an embodiment of the present invention; Fig. 2 is an exploded perspective view of the door of the microwave oven;
FIG. 3 is a sectional view of the main part of the microwave oven when the door is closed. 1...Microwave oven body, 2...Door, 3...Fixed handle, 7...Door cover, 8...Engaging claw, 10
... Spring, 15 ... Stoppa.

Claims (1)

[Scope of utility model registration request] A heating chamber disposed within the microwave oven body to store food; a door rotatably supported on the microwave oven body to open and close the front opening of the heating chamber; a fixed handle integrally formed on the cover of the door; a stopper disposed on the main body side and having an engaging pawl guide surface, which is swingably attached to the door and is guided by the engaging pawl guide surface when the door is closed, engages with the stopper, and faces the stopper; A microwave oven characterized by comprising an engaging claw formed in a dogleg shape with obtuse angle sides, and urging means for urging the engaging claw in a direction in which the engaging claw engages with the stopper.