KR20050081374A - A locking structure of electric oven - Google Patents

Abstract

The present invention relates to a locking structure of an electric oven that installs a latch assembly configured to reciprocate in an arc by a cam moving in a rotational motion in the front of an electric chamber. The locking structure of the electric oven according to the present invention is formed in the central portion of the upper end of the door that is selectively opened and closed, the latch hook portion 200 for preventing the opening of the door, and is installed in the central portion of the front of the electrical equipment room is provided with a plurality of parts In the electric oven configured to include a latch assembly 100 coupled to and removed from the latch hanger 200, the latch assembly 100 is moved by a cam 140 that rotates. ) Is reciprocating with an arc. And, the latch 150 is characterized in that the circular arc reciprocating motion while having a slope to improve the sealing when the door is closed. According to the present invention, the structure of the latch assembly is simple, there is an advantage that can be manufactured small in size (size).

Description

A locking structure of electric oven

The present invention relates to an electric oven, and more particularly, to a locking structure of an electric oven in which a latch assembly configured to reciprocate in an arc by a cam flowing in a rotary motion is installed in front of an electric chamber.

Electric oven is a cooker product that can cook a variety of food by increasing the output by using various types of heating sources to cook a large amount of food quickly and evenly.

1 is a side cross-sectional view of a conventional convection type electric oven.

Referring to FIG. 1, a door 11 that is selectively opened and closed from the upper side to the lower side is installed at a front surface of the cooking chamber 10 where food is cooked, and the air inside the cooking chamber 10 is sucked in the rear of the cooking chamber 10. Heater chamber 30 for discharging back to the cooking chamber 10 is installed.

Opening and closing protrusions (not shown), which are one component of the opening and closing means of the door 11, are formed at both sides of the upper end of the door 11, and a self-cleaning operation of the electric oven is performed at the upper center portion of the door 11. The latch hook portion 11a, which is one component of the locking device for preventing the door 11 from being opened, is further formed.

The heater chamber 30 has a motor 20 for driving the convection fan 40 to be described below, and a convection fan 40 coupled to the rotating shaft 21 of the motor 20 to generate air circulation and the Convection heater (50) positioned around the convection fan (40) to generate heat, and the back plate (32) forming the rear of the cooking chamber 10, that is, the back of the cooking chamber 10 in front of the heater The chamber cover 42 is installed to secure the space of the chamber 30.

At the center of the chamber cover 42, the air inside the cooking chamber 10 is sucked by the convection pan 40, and the air heated in the heater chamber 30 is again cooked by the convection pan 40. 10) The air access hole 42a for discharging to the inside is formed of a plurality of holes.

The lower surface of the cooking chamber 10 is provided with a tray 12 on which a workpiece is placed, and a lower heater 80 is installed below the cooking chamber 10 to generate heat by applying power.

An electric heating chamber 90 having a plurality of components is formed in the cooking chamber 10. The electric heating chamber 90 has an upper heater 60 performing the same function as the lower heater 80, and the upper portion. A stirrer pan 61 which transfers heat generated from the heater 60 into the cooking chamber 10, a halogen heater 62 which transmits radiant heat, and a heater cover 63 which surrounds and protects the halogen heater 62. And many parts are installed.

Such a plurality of heaters, that is, a plurality of heating sources are provided to increase the output of the electric oven to quickly and evenly cook the food to be cooked, evenly cooked food to cook a variety of food characteristics To make it possible.

In addition, the electric chamber 90 is provided with an upper fan 70 for discharging the gas inside the cooking chamber 10, and a blow fan 64 for discharging hot air from the electric chamber 90 to the outside. The latch assembly 92 corresponding to the latch hook portion 11a is further installed on the front surface.

The latch assembly 92 has an external appearance and a latch board 92a fixed to the electric compartment 90, a micro switch 92b for detecting whether the door 11 is locked, and power. The motor 92c to generate | occur | produce, the cam 92d which carries out rotational motion by the power of the said motor, the latch 92e which moves while drawing a trajectory by the rotational movement of the cam 92d, and the track | orbit of the latch 92e. And a spring 92f made of an elastic member for restoring the movement, a first guide hole 92g, a second guide hole 92h, and the like, which are formed to guide the trajectory movement of the latch 92e.

As shown in FIG. 3, the first guide hole 92g has an approximately '<' shape so that the latch 92e may move to the left side (as viewed from above) by a predetermined distance and then move downward to a predetermined distance. The second guide hole 92h is formed in the latch board 92a in a substantially rectangular shape in left and right directions so as to smoothly perform a trajectory movement of the latch 92e.

On the other hand, referring to the operation of the electric oven having the configuration as described above, the heat generated from the upper heater 60 and the lower heater 80 by the application of the power and the radiant heat of the halogen heater 62 to the cooking chamber 10. Delivered. In addition, depending on the type of food, the microwave may be further radiated.

In addition, the convection fan 40 inside the heater chamber 30 is rotated by the motor 20 to suck the air in the cooking chamber 10, heated by the convection heater 50, and then again into the cooking chamber ( 10) Perform hot air circulation to discharge inside.

To this end, the air inside the cooking chamber 10 is sucked through the air access hole 42a processed in the rear wall of the cooking chamber 10, that is, the center of the chamber cover 42, and inside the heater chamber 30. The hot air is formed by the convection fan 40 connected by the motor 20 and the rotary shaft 21 and the convection heater 50 installed around the convection fan 40. That is, the motor 20 rotates the convection fan 40 together with the operation of the electric oven, and at the same time, the convection heater 50 operates to generate heat for heating ambient air.

The convection fan 40 sucks the surrounding air into the heater chamber 30 through the air access hole 42a in the center of the chamber cover 42 and blows the air into the cooking chamber 10. Therefore, the ambient air heated by the heat generated by the heater 50 provided in a circular shape around the convection fan 40 forms the hot air forcedly circulated by the convection fan 40.

The hot air is blown back into the cooking chamber 10 by the convection fan 40 through the rear wall of the cooking chamber 10, that is, through the air access hole 42a formed in the chamber cover 42, and thus, You will experience forced convection, which supplies the heat energy needed for cooking.

Then, after cooking the food in the hot air as described above to perform the self-cleaning (self-cleaning) to clean the food residue or grease left in the cooking chamber 10, which is a self-cleaning button by the user's arbitrary selection This is done by pressing (not shown).

When the user presses the self-cleaning button, the cooking chamber 10 forms a substantial high temperature (450 degrees to 500 degrees) higher than when the food is cooked, thereby pyrolyzing the food residue or grease remaining in the cooking chamber 10 to ash. Therefore, when the temperature of the cooking chamber 10 is sensed by a sensor (not shown) and becomes 250 degrees or more, a signal is sent to drive the motor 92c by a micom (not shown).

The cam 92d for converting the rotational motion into the reciprocating motion is operated by the operation of the motor 92c, and the latch 92e performs the trajectory reciprocating motion as shown in FIG. 3 by the operation of the cam 92d. The door 11 is coupled to the latch hook portion 11a and the locked state of the door 11 is checked by the microswitch 92b of the latch assembly 92 until the self-cleaning operation is completed. It will not open.

That is, the latch 92e moves a predetermined distance to the left along the first guide hole 92g formed in a substantially '' 'shape, and then moves downward to a predetermined distance. In addition, the latch 92e is engaged with the latch hook portion 11a to complete the locking. In this case, the microcomputer stops the operation of the motor 92c, and the door 11 is no longer opened even when an external force is applied.

Then, as the self-cleaning ends and the sensor senses the temperature of the cooking chamber 10 and becomes 250 degrees or less, the cam 92d rotates by operating the motor 92c in the micom. The latch 92e performs the trajectory movement in reverse to the above. Therefore, when the latch 92e moves in a direction opposite to that when the latch 92e is engaged with the latch hanger 11a, the micro switch 92b of the door 11 moves away from the latch hanger 11a. Locking is released.

As described above, when the locking is released and a message indicating that the self-cleaning is completed in the microcomputer appears or a beep sounds, the user may open the door 11 and wipe the cooking chamber 10 with a clean cloth or cloth.

However, in the conventional technology as described above, there is a problem in that the structure of the latch assembly 92 which is operated during the self-cleaning operation is complicated, and its size is large, which is not suitable for the small model.

An object of the present invention for solving the above problems is to provide a locking structure of an electric oven for installing a latch assembly configured to reciprocate in a circular arc by a cam flowing in a rotational movement in the front of the electric chamber.

Locking structure of the electric oven according to the present invention for achieving the object as described above, is formed in the central portion of the upper end of the door that is selectively opened and closed, the latch hook portion for preventing the opening of the door, and a plurality of parts are provided In the electric oven is installed in the front center portion of the seal, comprising an latch assembly coupled to and detached from the latch hook portion, the latch assembly is configured to reciprocate the latch flowing in the circular arc by a cam for rotational movement It is characterized by.

The latch is characterized in that the circular reciprocating motion with an inclination to improve the sealing when the door is closed.

According to the present invention having such a configuration, the structure of the latch assembly is simple, there is an advantage that can be manufactured small in size (size).

Hereinafter, with reference to the accompanying drawings, preferred embodiments of the present invention as described above will be described in detail.

4 is a plan view of a latch assembly according to a preferred embodiment of the present invention, Figure 5 is a cross-sectional view showing a coupling state of the latch assembly and the latch assembly according to a preferred embodiment of the present invention. And, Figure 6 is a plan view showing the circular reciprocating motion of the latch according to a preferred embodiment of the present invention.

As shown in these drawings, the door (not shown) selectively opens and closes a cooking chamber (not shown) in which food is cooked, and on both sides of the upper back, a door opening and closing protrusion (shown as one of the arbitrary opening and closing means of the door). (Not shown) is formed, and a latch hook portion 200, which is one component of a locking device for preventing the door from opening when a self-cleaning operation of the electric oven is formed, is formed at the center of the upper rear side.

In addition, opening and closing hook portions (not shown) corresponding to the door opening and closing protrusions are installed on both sides of the front side of the electrical equipment room (not shown) provided with a plurality of parts, and corresponding to the latch hook portion 200 at the front center portion. The latch assembly 100 is further installed.

Looking at the configuration of the latch assembly 100 as shown in Figure 4 and 5, the latch assembly 100, the latch board 110 to protect the cam 140 to be described below and to form the appearance of one side Is provided. The latch board 110 has a flat plane to be fixedly installed in the electrical equipment room, it is preferable that the latch board 110 is composed of an iron plate to withstand a considerable high temperature of the cooking chamber.

The other side of the latch board 110 is provided with a motor for generating power 120, the side of the motor 120 is provided with a micro switch 130 for checking the locking (locking) of the door during self-cleaning operation. .

And, the side of the micro switch 130 is a cam 140 for rotational movement by the power of the motor 120, the side of the cam 140 is circular reciprocating motion by the rotational movement of the cam 140 The latch 150 is preferably installed with a predetermined inclination upwards. This is to improve the sealing property of the door by pulling the latch hook portion 200 while the latch 150 is engaged with the latch hook portion 200 when the door is closed.

In addition, between the cam 140 and the latch 150 is provided with a shaft 160 connecting the cam 140 and the latch 150, the end of the latch board 110 to guide the reciprocating motion in an arc A guide hole 170 is formed in a substantially rectangular shape, and a spring 180 made of an elastic member for restoring the circular reciprocating motion of the latch 150 is connected between the latch 150 and the latch board 110. It is further provided.

Next, the latch assembly 100 having the above-described configuration is installed on the front of the electric compartment and looks at the action of being combined with and detached from the latch hanger 200.

After the user has cooked the food, self-cleaning is performed to clean up food residues or grease left in the cooking chamber (not shown), which is self-cleaning button (not shown). Press to execute.

After the door (not shown) is closed and the user presses the self-cleaning button, after the preheating time for raising the temperature of the cooking chamber has elapsed (about 3 to 5 minutes), the temperature of the cooking chamber is performed for self-cleaning. The condition rises. Then, self-cleaning of the cooking chamber is performed.

At this time, the temperature of the cooking chamber is formed at a considerable high temperature to burn the food residues inside, the time required for self-cleaning takes a considerable time, the door for opening and closing the cooking chamber during the self-cleaning time is opened It should not be. This is because, if the door is opened while the self-cleaning is in progress, the cooking chamber is thermally expanded under the influence of the suddenly lowered atmospheric pressure and there is a risk of explosion.

Therefore, a locking device is required to prevent the door from being opened while the self-cleaning is in progress, and the law stipulates that the door should not be opened if the temperature of the cooking chamber is 350 degrees or more.

On the other hand, the temperature of the cooking chamber is checked by a sensor provided separately. When the sensor senses the temperature of the cooking chamber and becomes 250 degrees or more, a signal is sent to drive the motor 120 of the latch assembly 100 at a micom (not shown).

The cam 140 for switching the rotational motion to the reciprocating motion by the operation of the motor 120 is operated, the latch 150 is moved by the movement of the latch 150 by the operation of the cam 140. ) Thus, the door is completely locked and does not open arbitrarily during self-cleaning.

That is, the latch 150 reciprocates while drawing a predetermined arc along the guide hole 170 formed in the latch board 110. In more detail, as shown in FIG. 6, the cam 140 rotates in a counterclockwise direction and moves in a predetermined arc such that the latch 150 is coupled to the latch hanger 200.

Therefore, the latch 150 is coupled while pulling the latch hanger 200, and the locking is not opened until the end of the self-cleaning operation by checking the locked state of the door in the micro switch 130 (locking) is completed. In this case, the microcomputer stops the operation of the motor 120, and the door is no longer opened even when an external force is applied.

Then, when the self-cleaning is finished, the sensor detects the temperature of the cooking chamber and becomes 250 degrees or less, by operating the motor 120 in the micom, the cam 140 rotates counterclockwise again to the latch ( In contrast to the above, 150 moves in a predetermined arc. Therefore, when the latch 150 moves in the opposite direction as when the latch 150 is coupled with the latch hanger 200 and leaves the latch hanger 200, the microswitch 130 releases the locking of the door.

As described above, when the locking is released and a message indicating that the self-cleaning is completed in the microcomputer is displayed or a beep sounds in the microcomputer, the self-cleaning operation is completed. Then, the user can open the door and wipe the cooking chamber with a clean cloth or cloth.

The scope of the present invention is not limited to the above-exemplified embodiments, and many other modifications based on the present invention may be made by those skilled in the art within the above technical scope.

Locking structure of the electric oven according to the present invention as described in detail above, the latch assembly is configured to be installed in the front of the battle room, the latch assembly is configured to reciprocate in a circular arc by the cam flowing in the rotary motion.

Therefore, since the structure of the latch assembly operated during the self-cleaning operation is simple and can be manufactured by miniaturizing the size, an effect that can be applied to a compact electric oven is expected.

In addition, since the structure of the latch assembly is simply configured, the component price can be reduced, and thus, the effect of preempting the superiority in the price competitiveness of the product can be expected, resulting in an increase in the consumer's desire to purchase the product.

1 is a side cross-sectional view of a conventional electric oven.

Figure 2 is a perspective view showing a latch assembly of a conventional electric oven.

Figure 3 is a plan view of a schematic latch assembly showing a state in which the latch of the conventional electric oven is operated.

4 is a plan view of the electric oven latch assembly according to a preferred embodiment of the present invention.

Figure 5 is a schematic side cross-sectional view showing a combined state of the interlock device of the electric oven according to a preferred embodiment of the present invention.

Figure 6 is a schematic cross-sectional view showing a state in which the latch operation of the electric oven latch assembly according to a preferred embodiment of the present invention.

Explanation of symbols on the main parts of the drawings

100. ..... Latch Assembly 110. ..... Latch Board

120. ..... Motor 130. ..... Microswitch

140. ..... Cam 150. ..... Latch

160. ..... Shaft 170. ..... Guide Hole

180. ..... spring 200. ..... latch

Claims (2)

Is formed in the upper center portion of the door that is selectively opened and closed, the latch hook portion for preventing the opening of the door, In the electric oven is installed in the central portion of the front of the electrical chamber is provided with a plurality of parts, comprising a latch assembly coupled to and removed from the latch hook portion, The latch assembly is a locking structure of the electric oven, characterized in that the latch flows by the cam for rotational movement is configured to reciprocate in an arc. The method of claim 1, wherein the latch, Locking structure of the electric oven, characterized in that the circular reciprocating motion having an inclination to improve the sealing when the door is closed.