KR20050009549A - Door locking system of electric oven - Google Patents

Abstract

PURPOSE: A door-locking system of an electric oven is provided to lock a door-fastening part by rotating a rotary lever according to the driving of a motor and executing rectilinear motion by rotary motion of the rotary lever and to switch on/off micro-switches according to the rotary motion of the rotary lever. CONSTITUTION: A door-locking system of an electric oven comprises a motor(110) rotating a shaft(111) in the normal or reverse direction; a rotary lever(120) connected to the shaft of the motor; plural micro-switches(131,132) switched on/off by the rotation of the rotary lever; and a latch guide part(140) rectilinearly reciprocating by the rotary motion of the rotary lever and locking and unlocking a door latch(150) formed to a door frame. The rotary lever rotates within a predetermined range.

Description

Door locking system of electric oven

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a door locking system of an electric oven, and more particularly, to a locking system capable of controlling a door locking as well as controlling a switch operation of a micro switch by a lever that rotates with a motor driving force.

In general, a microwave oven is configured to place food on a tray in a cooking chamber and to irradiate the high frequency generated by the magnetron into the cooking chamber so that the food is heated and cooked by the high frequency. Among these microwave ovens, a microwave oven that heats and cooks food only by a high frequency is called a single function microwave oven. A microwave oven having a grill and oven function as a function of not only the high frequency but also the convection of radiant heat of a heater or hot air by a convection fan is a multifunctional microwave oven. It is called a microwave oven.

The above-mentioned single-function microwave oven and multi-functional microwave oven are divided into a cooking chamber and an electric equipment room. In the electric power room, a magnetron and a waveguide that emit microwaves by applying a high voltage by a high voltage transformer and a high voltage transformer that generate a high voltage. In addition, a cooling fan for cooling the high heat generated while the high voltage transformer and the magnetron are operated and a duct for inducing the wind of the cooling fan to the inside of the cooking chamber are installed.

Referring to the accompanying drawings, a configuration of a gas oven range according to a conventional example is as follows.

Referring to FIG. 1, the gas oven range includes a gas range unit 2 installed on an upper portion of the main body 1 to perform a gas range function, and an oven range unit installed inside the main body 1 to perform an oven function. 3) is composed largely. In addition, the gas range unit 2 and the oven range unit 3 are controlled by the controller unit 4, respectively.

In addition, the food is accommodated in the central portion of the main body 1 is made of a door 30 for opening and closing the opening of the cavity (3a) formed of a predetermined space that can be cooked, the door 30 is installed at the lower end The hinge allows the opening and closing up and down. In addition, the upper part of the oven chamber (3a) is equipped with an electric equipment compartment is configured inside the electronic parts.

The gas oven range is used as a multi-purpose cooking apparatus such as not only can cook uniformly without burning various foods such as fish, meat or potatoes in the oven chamber 3a, but also bake bread as needed.

The gas oven range as described above is usually cooked at a high temperature of about 100 ~ 300 ℃ when cooking the oven, the heat dissipating door is installed in the front of the oven chamber (3a) so that the heat during cooking does not blow out to the outside Will be. That is, when cooking, cooking is performed with the door 30 closed, and food is stored and taken out with the door open before and after cooking.

When the door 30 is installed on the front plate of the microwave oven, one side of the door is usually pinned to the hinge of the front plate, and then the entire door is rotated and opened on the front of the microwave oven around the pin axis of the hinge. Some are commercialized by adopting the up / down door structure that is opened and closed from top to bottom.

In addition, a hook is installed at the other side of the door, and a lock device is installed at the front of the cavity, so that the user can open the door by pressing a door button formed at one side of the control panel.

The locking device is a top and bottom (left / right) hook of the door is a locking and releasing, consisting of a variety of micro switches and rotation levers, the lock device is configured so that a separate bracket after the parts Will be installed. In addition, the front plate on which the lock device bracket is installed is formed with a hole corresponding to the center hole formed in the lock device bracket, and the lock device bracket is fixed to the flange formed to the rear of the front plate. In addition, the atmospheric oven range is added to the structure so that the locking can be made by the electrical operation by placing the locking portion in the center of the door.

Therefore, after the lock device bracket is installed as described above, the hook of the door enters and exits the lock hole of the lock device through the hook hole of the front plate, so that the hook is locked and released and the door is opened accordingly. The micro switch is used interchangeably with the name of the limit switch (safety switch) and is used to detect the displacement mechanically. For example, when the door is opened in a microwave oven, the open and close state of the door is judged. By energizing the load, the high frequency radiated to the cooking chamber does not leak out of the microwave oven.

2 is a door locking system of a conventional electric oven.

Referring to FIG. 2, when the oven range is operated, power is applied to generate the piston driving element 11, and the piston 12 performs the reciprocating motion due to the heating of the element. At this time, the rotary lever 13 coupled to the end of the piston 12 rotates in response to the reciprocating motion to lock the door hanger 14, thereby allowing the door hanger to protrude to the center of the upper door. On the contrary, the locking unit 13 rotates through the reciprocating motion of the piston 11 to release the locking structure to the door hanger unit 14.

However, in the related art, the unlocking and locking operation for locking the door locking portion is determined by the rotation lever which rotates according to the reciprocating motion of the piston, which may cause a possibility of malfunction or an unstable door locking.

The present invention has been made to solve the above problems, by rotating the rotary lever in accordance with the drive of the motor and performing a linear movement of the rotary lever of the rotary lever to lock the door hanger, while the It is an object of the present invention to provide a locking system of an electric oven in which a micro switch can be turned on / off according to a rotational movement.

1 is a perspective view of a typical electric oven.

Figure 2 is a block diagram of a conventional door locking system of the electric oven.

Figure 3 (a) is a plan view of the door locking system of the electric oven according to an embodiment of the present invention, (b) is a side view thereof.

4 and 5 are views showing the operating state of the door locking system according to an embodiment of the present invention.

<Description of the symbols for the main parts of the drawings>

101 ... Top 110 ... Motor

111.Motor shaft 120.Rotary lever

121 ... Shaft insertion hole 122 ... Guide shaft hole

123,124 ... contact 131,132 ... micro switch

133,134.Contact 140.Latch guide

141 ... guide shaft 142 ... guide groove

143 ... Guide screw 144 ... Door release

145.Latch groove

Locking device of the electric oven according to the present invention for achieving the above object,

A motor for axially rotating in the forward or reverse direction;

A rotation lever connected to the shaft of the motor and rotating within a predetermined range;

A plurality of micro switches switched on / off by rotation of the rotary lever,

And a latch guide part for straightening and releasing the door latch formed on the door frame by linearly reciprocating by the rotary motion of the rotary lever.

Preferably, the rotary lever has a shaft insertion hole in which a motor shaft is inserted into a center portion, a plurality of contact protrusions protruding for turning on / off each of the micro switches on one left / right surface, and an upward protrusion of the latch guide portion on the other center portion. And a guide shaft hole coupled with the guide shaft.

Preferably, the latch guide portion is an upwardly projecting guide shaft inserted into the guide projection hole to one side, a plurality of guide grooves on the center line for guiding in a linear direction, the latch latched or unlocked with the door latch to the other side Characterized in that it includes a removable part.

Preferably, the plurality of micro switches are alternately turned on / off according to the rotational movement of the rotary lever, characterized in that the locking or unlocking of the door latch is performed.

Hereinafter, with reference to the accompanying drawings as follows.

3 (a) and 3 (b) are a plan view and a cross-sectional view of the door locking system according to the embodiment of the present invention.

Referring to FIG. 1, the upper plate 101 includes a motor 110 seated on the upper plate 101 and axially rotated in a forward or reverse direction, and first and second contact protrusions 123 and 124 protruding on a left / right circumferential surface in a disk shape. The rotary lever 120 rotates by the motor shaft 111 and the first and second micro switches on / off by the contact protrusions 123 and 124 during the rotary movement of the rotary lever 120. 131 and 132 and a latch guide part 140 for locking or releasing the door latch 150 by linearly reciprocating according to the rotational movement of the rotary lever 120.

Referring to the accompanying drawings, the locking system of the electric oven according to the present invention configured as described above are as follows.

First, referring to (a) and (b) of FIG. 3, the motor 110 is seated and fixed on the upper plate 101, and a disk-shaped rotary lever 120 having a lower center motor shaft 111 located below. It is inserted into the shaft insertion hole 121 formed in the center of the. Here, the rotary lever 120 has a disc shape, the guide shaft hole 122, the first and second contact protrusions (123, 124) protrude to the circumferential side. That is, the guide lever hole 122 and the plurality of contact protrusions 123 and 124 are formed in the rotary lever 120 at intervals of 120 degrees. In an embodiment, the driving force may be transmitted by arranging the motor 110 and the rotation lever 120 in a horizontal direction instead of a stacked structure.

In addition, the first and second micro switches 131 and 132 are installed outside the radius of the rotary lever 120, and are provided with switch contacts 133 and 134, respectively, and the radius of rotation of the first and second contact protrusions 123 and 124. Located in In an embodiment, the positions of the micro switches 131 and 132 and the positions of the contact protrusions 123 and 124 may also be changed to corresponding positions.

The guide shaft hole 122 of the rotary lever 120 is coupled to the guide shaft 141 which protrudes upward at one end of the horizontal latch guide portion 140 so as to linearly reciprocate the circular motion of the rotary lever 120. Guide as much as possible.

In addition, at least one latch guide groove 142 is guided in the center of the latch guide portion 140 along a fixed guide member such as a screw 143 within a linear movement range, and the other end of the latch guide portion 140. The latch detachment unit 144 protrudes in the lateral direction, and a latch groove 145 is detached from the door latch unit 150 in the center of the latch coupling unit 144. In an embodiment, the latch attaching and detaching portion 144 may have a "L" shape or the like so that it can be locked and released.

Specifically, the ruled state of FIG. 4 and the unlocked state of FIG. 5 will be described with reference to FIG. 3.

As shown in FIGS. 3 and 4, when the door is closed, power is supplied by sensing the door, and power is supplied to the motor 110 according to the key signal of the controller, and thus the motor shaft 111 is driven in a predetermined direction. The rotary lever 120 is pivotally connected to the center of the motor shaft 111 in the clockwise direction.

When the rotary lever 120 rotates in a predetermined direction, the first contact protrusion 123 of the rotary lever 120 presses the contact 133 of the first micro switch 131 on the right line thereof. Switch it on. At the same time, the latch guide part 140 in which the guide shaft 141 is inserted into the guide shaft hole 122 of the rotary lever 120 is linearly moved by the clockwise rotation of the rotary lever 120.

At this time, the groove 145 of the latch detachable part 144 protruding from the other end of the latch guide part 140 is caught by the door latch 150, so that the door latch 150 is caught and the locking device is locked by the above-described locking device. do.

On the contrary, as shown in FIGS. 3 and 5, when the door is opened, power is supplied to the motor 110 so that the motor shaft 111 reverses rotation, thereby rotating the rotation lever 120 counterclockwise. do. When the rotary lever 120 rotates in the counterclockwise direction, the second contact protrusion 124 of the rotary lever 120 presses the contact point 134 of the second micro switch 132 to switch on. At this time, due to the rotation of the rotary lever 120, the first micro switch 131 which is switched on is switched off because the first contact protrusion 123 and the contact 133 are separated.

At the same time, as the rotary lever 120 rotates counterclockwise, the guide groove 142 of the latch guide part 140 linearly moves in the opposite direction along the screw 143, and the latch detachment part 144 of the other end is moved. Latch groove 145 is removed from door latch 150. Accordingly, the door latch is released and there is a state in which the door can be opened.

As such, the protrusions 123 and 124 are formed on the left and right sides of the disc-shaped rotating lever 120 that rotates, so that the rotational force of the motor 110 and the operation contact of the micro switches 131 and 132 can be sensed. To lock the latch.

According to the locking system of the electric oven according to the present invention as described above, the rotary lever for rotating the shaft rotation of the motor controls the on / off switch of the micro switch and simultaneously transmits the rotational movement in a linear movement to determine the door latch. By releasing it, it is possible to simultaneously control the motion detection and double locking of the micro switch.

Claims (4)

A motor for axially rotating in the forward or reverse direction; A rotation lever connected to the shaft of the motor and rotating within a predetermined range; A plurality of micro switches switched on / off by rotation of the rotary lever, And a latch guide part for straightening and releasing the door latch formed on the door frame by linearly reciprocating by the rotational movement of the rotary lever. The method of claim 1, The rotary lever may include a shaft insertion hole in which a motor shaft is inserted in a center portion, a plurality of contact protrusions protruding on and off of each of the micro switches on one left / right surface, and a guide shaft protruding upward from the latch guide portion in the other center portion. Locking system of the electric oven, characterized in that it comprises a guide shaft hole coupled. The method of claim 1, The latch guide part includes an upwardly protruding guide shaft inserted into the guide protrusion hole to one side, a plurality of guide grooves on a center line for guiding in a straight direction, and a latch detachable part to be locked or unlocked with the door latch to the other side. Locking system of the electric oven, characterized in that. The method of claim 1, And a plurality of micro switches are alternately turned on and off according to the rotational movement of the rotary lever, thereby locking or unlocking the door latch.