JPS5817885Y2 - Door lock mechanism of high frequency heating equipment - Google Patents

Description

[Detailed Description of the Invention] (Technical Field of the Invention) This invention relates to an improvement of a door lock mechanism in a high-frequency heating device such as a microwave oven.

(Technical background of the invention) Conventionally, this type of door lock mechanism has an operating part that operates an engaging element called a hook on a handle provided on the door.
By rotating this handle, the state of the locking element is changed via the operating section, and the lock to the main body of the door is released.

When the above-mentioned hook is locked into the main unit, it simultaneously turns on a microswitch connected to the power circuit of the microwave oven, and when the lock is released, the microswitch is turned off, ensuring the safety of the cook who operates the door. It was measured.

In addition, a plurality of hooks were provided, and these hooks were operated independently by an operating section provided on the handle.

In this case, when opening and closing the door, it is necessary to operate a plurality of hooks simultaneously or in sequence using an operating section provided on the handle, making the structure complicated.

(Problems in the Background Art) However, in the case where there is only one hook as in the past, if the microswitch controlled by this hook remains on and malfunctions, the microwave oven will not open even if the door is opened. There was a risk that the power supply would not be opened and radio waves would leak.

Furthermore, even those having a plurality of hooks have the disadvantage that the structure is complicated, making operation extremely troublesome, and the structure of the handle is limited.

(Purpose of the invention) This invention was made based on the above circumstances, and its purpose is to link the operation of a movable handle provided on the door to a plurality of retainers via an interlocking rod, and to An object of the present invention is to provide a door lock mechanism for a high-frequency heating device that can be operated simultaneously to facilitate operation and simplify the structure.

(Summary of the invention) This invention uses interlocking rods, movable handles, etc. installed across multiple retainers to form a link mechanism, and multiple retainers are interlocked with a simple structure, ensuring a reliable door lock mechanism. It is a measure of gender.

(Embodiment of the invention) An embodiment of the invention will be described below with reference to FIGS. 1 and 2.

Reference numeral 1 in FIG. 1 denotes a main body of a high-frequency heating device such as a microwave oven, and this main body 1 is constructed by accommodating an inner box 3 in a cabinet 2 to form a high-frequency heating chamber with an open front.

Further, a base end portion of a door 4 for opening and closing the front opening of the high frequency heating chamber is pivotally attached to the front and side portions of the main body 1.

As shown in FIG. 2, this door 4 has a hollow portion 5 at least on the free end side of the peripheral portion, and using this hollow portion 5, the base end side is rotatably supported by a pin 6.7. A pair of upper and lower engaging elements 8 and 9 are provided.

The free end sides of these engaging elements 8 and 9 loosely pass through the back plate of the door 4 and protrude to the back side, and the engaged parts (
(not shown) have hook-shaped hook portions 10 and 11, respectively.

Further, both the engaging elements 8 and 9 are pivotally attached to both ends of the interlocking member 14, whose base end is an interlocking rod, with pins, so that they are held in an interlocking state.

Both the engaging elements 8 and 9 have a spring 1 stretched between one of the engaging elements 8 and the fixing pin in the hollow part 5.
8 constantly biases each hook portion 10.11 in the direction of engagement with the secured portion of the main body 1.

The upper engaging member 8 is integrally provided with a branch piece 26 that projects upward at a substantially right angle from the pivot pin 6, and the interlocking member 14 has a hanging portion 14a extending from a pivot point with the lower engaging member 9. The end of this hanging part 14a is connected to the hollow part 5 of the door 4.
The bent portion is located below the lower engager 9 in the pin 2.
Link 2 in an abbreviated form rotatably supported by 8
It is pivoted to one end of 7 with a pin 29 in a substantially orthogonal state.

On the other hand, the movable handle 20 is loosely fitted into the groove of the handle 19, and both ends thereof loosely pass through the front wall of the door 4 and protrude into the hollow part 5. Piece 2
6, and the lower protruding end thereof is pivotally connected to the other end of a link 27 which is substantially orthogonal thereto.

The movable handle 20, which is thus held interlocked with each of the engaging members 8 and 9, is urged by the spring 18 in a direction in which the center portion approaches the front side of the door 4.

Next, to explain the operation, the door 4 closes the high-frequency heating chamber opening of the main body 1, and the hook portions 10 of the respective engagers 8 and 9.
11 is engaged with the secured portion of the main body 1, the handle 1
When the movable handle 20 is grasped together with the movable handle 20, the movable handle 20 is pulled in the direction of the arrow X in the figure, causing the engager 8 to rotate counterclockwise in the figure against the spring 18, and at the same time, also rotates the link 27. Since they are rotated in the same direction, the lower engagement member 9 is lowered by following the lowering of the interlocking member 14.
The hook portions 10 and 11 of the upper engaging elements 8 and 9 are separated from the engaged portions of the main body 1, and the door 4 is unlocked.

(Effect of the device) As explained above, this device is provided with a plurality of retainers rotatably provided on the free end side of the door, protruding toward the back side of the door, and engaging and disengaging from the secured portion. Since they are interlocked via an interlocking rod, and this interlocking rod is also interlocked with a movable handle provided on the front of the door using a non-knock mechanism, it is possible to operate multiple lockers simultaneously with a simple structure and with certainty. This effect is achieved.

[Brief explanation of the drawing]

FIG. 1 is an external perspective view of a general high-frequency heating device, and FIG. 2 is a vertical sectional side view of a door lock mechanism of the high-frequency heating device showing an embodiment of the present invention. 1... Body, 4... Door, 8, 9...
... Engagement element, 14... Interlocking member (interlocking rod)
, 14a... hanging part, 20... movable handle, 26... branch piece, 27... link.

Claims (1)

[Scope of utility model registration request] A plurality of engaging elements provided on the free end side of the door that opens and closes the opening of the high-frequency heating chamber are engaged with a plurality of locked parts provided on the main body of the high-frequency heating chamber to lock the door to the main body. a plurality of locking elements that are rotatably arranged in parallel on the free end side of the door, protrude toward the back side of the locking elements, and engage with the secured portion; The structure includes a branch piece projecting at a substantially right angle, an interlocking rod extending between the plurality of engaging elements to interlock and rotate these engaging elements simultaneously, and a hanging part extending from the tip of the interlocking rod. A movable handle that penetrates the front side of the door and connects one end to the branch piece, and a link that connects the other end of the movable handle to the hanging part and is provided in the hollow part of the door. The high frequency device is characterized in that the locking element, the interlocking rod, the hook and the movable handle constitute a link mechanism, and the plurality of locking elements are interlocked with the movable handle provided on the front side of the door. Heating device door lock mechanism.