KR960013117B1 - Auto-opening and closing device of microwave oven's door or tray - Google Patents

Abstract

The device is designed to move a tray and a door using a motor for driving a turn table so that the door may be opened/closed in up/down direction by the straight movement of the tray engaged with each other. The device includes : a tray (14) contained in a cavity (10); a door (18) engaged with the tray (14); a turn table (12) mounted to the tray (14); a driving motor (20); a turn table moving means (28); a driving motor clutch means (22); a tray conveyor means (24); and a tray guide means (32).

Description

Automatic opening and closing door and tray of microwave oven

1 is an overall perspective view of a microwave oven in which a door and a tray automatic opening and closing device of a microwave oven according to the present invention are installed.

An enlarged perspective view of part 'A' of FIG.

3 is an enlarged exploded perspective view of part 'B' of FIG. 1,

4 is a cross-sectional view of the defect state of FIG.

5 is a sectional front view of the driving motor of FIG.

6 is a cross-sectional view taken along the line A-A of FIG.

7 is a plan view showing the operating state of the present invention.

* Explanation of symbols for main parts of the drawings

12 turntable 14 tray

18: door 20: drive motor

22: drive motor clutch means 24: tray transfer means

28: turntable rotation means 32: tray guide means

34: motor shaft 56: elastic member

60: elastic member storage piece 66: drive motor fixing piece

72: solenoid 74: first vertical bevel gear

76: electric gear 84: feed gear

92: guide member 96: tray storage detection sensor

The present invention relates to a door and a tray automatic opening and closing device of a microwave oven, and more particularly, provided with a turntable rotated by a motor on a tray, and both sides of the tray and both sides of the door are connected to each other by a link of the tray. Door and tray automatic opening and closing device of the microwave oven to perform the front and rear linear movement of the tray and the vertical movement of the door using only the motor for driving the turntable in the microwave oven configured to open and close the door in the vertical direction by the front and rear linear movement It is about.

In general, a tray on which a cooking vessel is placed is housed in a bottom of a cavity of a microwave oven, and a door is installed at a front side of the cavity, the door being hinged to a front side of the housing and opened in a left and right direction. In the microwave oven door and tray structure, when the user wants to cook food, the user presses the door open button by hand to open the door, and puts the cooking container containing the food on the tray inside the cavity, and then puts the door again. There was a problem that the use is very inconvenient because it has to give.

In order to improve the problems of the existing microwave oven door and tray structure, the applicant through the patent application No. 93-30154, the both sides of the rectangular tray accommodated in the cavity and both sides of the door by link to each other, It is mechanically coupled with the door open button between the rear end of the tray and the cavity inner wall, and an elastic member which always tries to act forward is installed so that when the door is released by the user pressing the door open button, the elastic member It proposed a door and tray automatic opening and closing structure of a microwave oven in which the tray is slid to the front of the cavity by the elastic force and the door connected by the tray and the link can be opened and closed in the vertical direction.

However, the electronic door and tray automatic opening and closing structure of the microwave oven of the prior application is applicable in the case of the rectangular shape in which the tray accommodated in the cavity is not rotated, but the electronics of the structure in which the turntable rotated by a separate driving motor is installed on the rectangular tray or more. There was a problem that can not be applied in the stove.

The present invention is to solve such a conventional problem, the object is to use a single drive motor to enable the rotational operation of the turntable and the linear movement of the tray to be searched on the tray in the cavity, the straight line in the front and rear direction of the tray The door and the tray of the new type microwave oven which can open and close the door in the vertical direction by the movement to provide an automatic opening and closing device.

In order to achieve the above object, the present invention is configured such that the door is opened and closed up and down, and both sides of the tray accommodated in the cavity and both sides of the door corresponding thereto are connected to the link to open and close the door according to the linear movement of the tray. In the configuration, the drive motor for applying power during the rotation operation of the turntable mounted on the tray and the forward and backward movement of the tray, and is arbitrarily rotatably fitted by a bearing at a predetermined position of the tray, the upper part is a turntable A turntable pivot means for pivoting the turntable while rotating according to the driving of the drive motor while the motor shaft of the drive motor is fitted in the lower part of the bottom of the center; Is installed in the position, the drive motor is fixedly installed on the upper surface A drive motor clutch means for intermittently engaging the coupling between the motor shaft of the drive motor and the turntable rotation means while elastically moving up and down according to the operation of the position, and between the drive motor and the drive motor and the inner side of the tray. It is installed on the inside of the tray conveying means for moving the tray linearly in the forward and backward direction by receiving the power of the drive motor when the motor shaft is lowered, and is installed on the inner surface of both sides of the tray and the cavity to make the linear movement of the tray safe. It has a characteristic consisting of a tray guide means to make.

Hereinafter, the present age will be described in more detail with reference to the accompanying drawings.

FIG. 1 is a perspective view of a microwave oven in which a door and a tray automatic opening and closing device of a microwave oven according to the present invention are installed, and a tray 14 having a turntable 12 mounted therein is installed in a cavity 10 of a microwave oven. The front surface of the cavity 10 is coupled to both sides of the tray 14 by the link 16 so that the tray 14 moves in and out while moving linearly from the inside of the cavity 10 to the outside of the microwave oven. The door 18 opening and closing in the up and down direction is installed, and the rotational force is applied to the turntable 12 mounted on the tray 14 on the bottom surface of the caviar 10 in which the tray 14 is accommodated. The drive motor 20 which energizes the conveyance operation of the tray 14, and the drive motor clutch means 22 which interrupts the up-down movement of the drive motor 20, and the tray conveyance means 20 are shown.

FIG. 2 is an enlarged perspective view of the 'A' part of FIG. 1, in which a receiving groove 26 having a predetermined depth along a longitudinal direction is formed in a predetermined portion of the bottom surface of the cavity 10, and a tray is formed in the receiving groove 26. A power is applied to the rotational motion of the turntable 12 and the forward / backward movement of the tray 14 at a vertically downward position of the center of the turntable 12 mounted on the tray 14 while the 14 is accommodated. The drive motor 20 and the drive motor 20 are fixedly installed on the upper surface. The drive motor 20 is moved up and down elastically according to the operation of the tray opening / closing switch, and the drive motor 20 is moved up and down randomly on the tray 16. The drive motor clutch means 22, which is coupled to or separated from the turntable pivot means 28, possibly sandwiched, shows a structure provided on the bracket 30. As shown in FIG.

In addition, the drive motor clutch means 22 and one side inner surface of the tray 14 are rotatably installed on another bracket 30 'protruding from a predetermined position of the receiving groove 26. When the driving motor 20 is lowered in order to move forward), the drive 14 receives the power of the driving motor 20 and moves the tray 14 forward while rotating in a predetermined direction. At the time of storing, the tray conveying means 24 which transfers the tray 14 to the rear side while being rotated in the opposite direction to the front conveying is installed, and on both inner surfaces of the tray 14 and on the inner wall of the cavity 10 It shows a structure in which the tray guide means 32 is installed to make the front and rear linear transfer operation of the tray 14 more stable.

FIG. 3 is an enlarged exploded perspective view of the 'B' portion of FIG. 1 and is in place in the driving direction of the drive motor 20 in a state in which it is engaged with the motor shaft 34 of the drive motor 20 at a predetermined position of the tray 14. The turntable 12 has a structure in which the turntable 12 is mounted via the turntable pivoting means 28 that is rotated. The turntable pivoting means 28 has a predetermined depth gripping groove 36 into which the tray 14 is fitted on the outer periphery. The formed body 38 and the inner protrusion 42 of the coupling boss 40 protruding from the center bottom surface of the turntable 12 on the outer circumferential surface of the upper surface center portion of the body 38 is formed. A coupling piece 46 formed with a locking groove 44 to be fitted, and a bearing 48 that is installed in a concentric manner on the upper and lower surfaces of the clamping groove 36 to reduce frictional resistance between the upper and lower surfaces of the tray 14 when rotating; , Is formed at a constant depth from the central bottom of the body 38 and the inner circumference is The structure consisting of the motor shaft insertion hole 52 is formed in the rotation preventing groove 50.

As described above, the random rotation prevention jaw 54 protrudes from the upper portion of the motor shaft 34 in accordance with the structure of the motor shaft insertion groove 52 on the body 38 constituting the turntable rotation preventing means 28.

4 is a cross-sectional view of the coupling state of FIG. 3, wherein the upper and lower surfaces of the tray 14 are fitted between the clamping grooves 36 of the body 38 constituting the turntable pivoting means 28 by bearings 48. On the outer circumference of the conical coupling piece 46 protruding from the center of the upper surface of the body 38, the inner protrusion 42 is inserted in the state where the engaging boss 40 protruded from the center bottom of the turntable 12 is inserted. It is fitted into the engaging groove 44, coupled to the motor shaft insertion groove 52 formed in the bottom center of the body 38, the random rotation prevention jaw (54) in the state in which the upper end of the motor shaft 34 of the drive motor 20 is inserted ) Is fitted into the random rotation preventing groove 50 of the inner circumferential edge of the motor shaft insertion groove 52.

In the present invention configured as described above, the driving motor clutch means 22 mentioned in the description of FIGS. 1 and 2 has both upper surfaces of the bracket 30 fixed on the receiving groove 26 on the bottom surface of the cavity 12. It is protruded from the inside, the elastic member 56 is always installed therein to try to operate upward, the upper surface of the elastic member storage piece 60 is formed with a guide hole 58 of a predetermined size, and the upper surface of the drive motor 20 is fixedly installed, a guide protrusion 62 protrudes from the bottom surface at a position corresponding to the guide hole 58 on each of the elastic member storage pieces 60, and between the guide protrusions 62 in the front-rear direction. A driving motor fixing piece (66) having a push rod insertion groove (64) directed toward the center, and fixedly installed on a receiving groove (26) at a front intermediate position of the driving motor fixing piece (66), and from the inside thereof. The tip of the protruding operation rod 68 is fitted into the push rod insertion groove 64 on the drive motor fixing piece 66. As the operation in the installed state down under the application of the tray opening signal comprises a solenoid 72, pusher 70 is moved down to the driving motor fixing part 66 is fixedly installed.

Meanwhile, in the present invention, the tray conveying means 24 mentioned in the descriptions of FIGS. 1 and 2 may include a first vertical bevel gear 74 fixedly installed on the motor shaft 34 of the driving motor 20. The first vertical bevel gear 74 is installed on the bracket 32 fixed to a predetermined position of the receiving groove 26 in a rotatable position when the driving motor 20 is vertically lowered according to the application of a tray opening signal. ) And a randomly rotated in position between the electric gear 76 and the transfer rack 78 formed in the longitudinal direction on one side inner surface of the tray 14, and between the electric gear 76 and the transfer rack 78 Rotating shaft 81 provided to be possible, a second vertical bevel gear 82 fixedly coupled to the upper portion of the rotating shaft 80 and engaged with the electric gear 76, and fixed to the lower portion of the rotating shaft 80. And a feed gear 84 that is engaged with the feed rack 78 and rotated.

In the tray transfer means 24, the electric gear 76 is driven while being fixedly coupled to one end of the rotating shaft 80 'and the rotating shaft 80' inserted into the upper end of the bracket 30 '. A first horizontal bevel gear 86 engaged with the first vertical bevel gear 74 fixedly installed on the motor shaft 34 when the motor 20 is lowered, and fixed to an opposite end of the rotation shaft 80 ', The second horizontal bevel gear (88) is rotated along the rotational direction of the first horizontal bevel gear (86) in engagement with the second vertical bevel gear (82) and transmits its power to the second vertical bevel gear (82). Is done.

Meanwhile, in the present invention, the tray guide means 32 mentioned in the description of FIG. 2 is fixedly formed at a constant width on the rear inner wall of the cavity 10 and guide grooves 90 along the longitudinal direction on the left and right sides thereof. The guide member 92 and the guide ribs which protrude in the longitudinal direction at predetermined positions on both inner surfaces of the tray 14 and are slid back and forth in a state of being fitted into the guide grooves 90 on the guide member 92 ( 94).

In the present invention formed as described above, the tray inner storage sensor 96 is installed at the rear inner wall predetermined position of the cavity 10 to sense the completion state of the tray 14 to block the current flowing to the solenoid 72. The solenoid 72 is electrically connected to the tray opening / closing switch separately from the tray storing sensor 96 so that a current flows when the tray opening signal is applied, and the conveying rack constituting the tray conveying means 24. (78) A normal limit switch electrically connected to the drive motor 20 is installed at the front end and the rear end so that the drive of the drive motor 20 is stopped when the transfer gear 84 touches the limit switch. When opening, make sure that the front departure is prevented.

Such a control method can be achieved through a conventional microcomputer.

5 is a front sectional view in which the driving motor 20 is lowered in FIG. 2, and the turntable rotating means 28 in which the motor shaft 34 of the driving motor 20 is sandwiched on the tray 14 is shown in FIG. When the operating rod 68 of the solenoid 72 is lowered according to the application of the tray opening signal from the coupled state, the driving motor clutch means 22 is moved by the action of the pressing rod 70 fixed to the operating rod 68. As the driving motor fixing piece 66 is lowered and the motor shaft 34 is separated, the first vertical bevel gear 74 fixedly coupled to the mother shaft 34 constitutes the electric gear 76. Engagement with the first horizontal bevel gear 86 indicates that power of the drive motor 20 is transmitted to the tray transfer means 24.

6 is a cross-sectional view taken along the line AA of FIG. 5, as the operating rod 68 of the solenoid 72 is lowered, and at the same time, the pressing piece 70 fixedly coupled to the operating rod 68 is vertically lowered. The drive motor fixing piece 66 coupled with the gambling rod 70 is vertically lowered by the same distance, and at the same time, the motor shaft 34 is disengaged from the state coupled with the turntable rotating means 28, and as a result, The first vertical bevel gear 74 fixedly mounted on the motor shaft 34 is lowered by the same distance.

On the other hand, Figure 7 is a plan view showing the operating state of the present invention, when the tray open signal is applied to the solenoid 72 in accordance with the operation of the user's tray opening and closing switch, the push rod coupled with the operating rod 68 of the solenoid 72 As the 70 is lowered, the driving motor 20 and its motor shaft 34 are lowered by pulling down the driving motor fixing piece 66 constituting the driving motor clutch means 22 and lowering the motor shaft ( 34 is separated from the state combined with the turntable rotating means 28, and at the same time the first vertical bevel gear 74 fixedly fitted on the motor shaft 34 is lowered by the same distance to the electric gear 76 Meshes with the first horizontal bevel gear 86 constituting the transmission, and thus the power of the driving motor 20 is transmitted to the second vertical bevel gear 82 and the transfer gear 84 constituting the tray transfer means 24. By the interaction of the transfer gear 84 and the transfer rack 78 on the tray 14 14 indicates that the is fed in the forward direction.

Referring to the operation of the present invention configured as described above are as follows.

5 to 7, the motor shaft 34 of the drive motor 20 rotates the turntable rotating means 28 with the tray 14 housed in the cavity 10 inside the microwave oven. It is inserted into the body 38 to form a cooking state, and when the user presses the tray opening and closing switch installed in the front of the microwave oven to open the tray 14 and the door 18 from the state in which the door 18 is closed. When the tray opening signal is applied to the solenoid 72 constituting the driving motor clutch means 22 and current flows, the tray opening signal is fixedly coupled to the operating rod 68 and the operating rod 68, and one end thereof is driven. As the push bar 70 inserted into the push bar insertion groove 64 on the motor fixing piece 66 is lowered vertically, the drive motor fixing piece 66 to which the drive motor 20 is fixed is lowered. (34) deviate from the turntable rotating means (28) associated with the turntable (12) Li is.

At the same time, as the first vertical bevel gear 74 fixedly fitted on the motor shaft 34 is lowered by the same distance and engaged with the first horizontal bevel gear 86 constituting the electric gear 76, the driving motor 20. Drive force is transmitted to the tray transfer means 24.

In this state, when the first horizontal bevel gear 86 is rotated along the driving direction of the driving motor 20, the first horizontal bevel gear 86, the second horizontal bevel gear 88, and the rotation shaft 80 ′ are rotated. The rotating gears 76 are rotated in the same direction, and the turning force is transmitted to the second vertical bevel gear 82 and the transfer gear 84 meshed with the transfer rack 78, and the transfer gear 84 rotates. In accordance with the linear movement of the transfer rack 78 according to the tray 14 is transferred to the front of the cavity (10).

At this time, the door 18 connected to the tray 14 and the link 165 is lifted upward and opened.

When the opening of the tray 14 is completed in this way, the limit position provided at the rear end of the transfer rack 78 comes into contact with the transfer gear 84 to stop the driving motor 20.

With the tray 14 and door 18 opened in this manner, the user removes the cooking container from the tray 14 or the turntable 12 on the tray 14, or replaces the cooking container. When the tray opening and closing switch is pressed again, the drive motor 20 is rotated in the opposite direction as when the drive motor 20 is opened so that the tray 14 enters the cavity 10 and the door 18 is rotated downward to close. The limit switch provided at the front end of the transfer rack 78 comes into contact with the transfer gear 84 to stop the driving motor 20.

At this time, when the tray 14 is completed in the cavity 10, the tray storage detection sensor 96 detects this to cut off the current flowing to the solenoid 72, and thus the operating rod 68 and the push rod The drive motor fixing piece 66 moves upward by the return force of the elastic member 56 accommodated in the elastic member storing piece 60 constituting the driving motor clutch means 22 while the 70 is returned to its original position. Is moved.

As a result, the turntable 12 is rotated while being inserted into the motor shaft insertion groove 52 on the bottom of the body 38 constituting the turntable rotating means 28 at the tip of the motor shaft 34 of the drive motor 20. Will be.

By applying the present invention as described above, it is possible to automatically open a tray equipped with a turntable using a single motor, which is very easy to use, and the unique structure in which the tray and the door are opened at the same time. This has the effect of further enhancing the image.

Claims (7)

The door 18 is configured to open and close up and down, and both sides of the tray 14 accommodated in the cavity 10 and both sides of the door 18 corresponding thereto are connected by the link 16 so that the front and rear of the tray 14 can be connected. The drive motor 20 is configured to open and close the door 18 according to the linear movement, and to power the rotational operation of the turntable 12 mounted on the tray 14 and the forward and backward movement of the tray 14. Wow; It is inserted and coupled to the predetermined position of the tray (14) by a bearing (48) rotatably, the upper portion is fitted into the engaging boss 40 protruding from the center of the bottom surface of the turntable (14), the lower portion of the drive A turntable rotating means 28 which rotates the turntable 14 while being rotated in accordance with the driving of the drive motor 20 while the motor shaft 34 of the motor 20 is fitted; The cavity 10 is installed at a predetermined position on the bottom surface, and the driving motor 20 is fixedly installed on an upper surface thereof so that the motor shaft 34 of the driving motor 20 is moved up and down elastically according to the operation of the tray opening / closing switch. A drive motor clutch means 22 for regulating whether the turntable rotation means 28 is engaged; The drive motor 20 and the drive motor 20 and the tray 14 is installed in the inner side corresponding to the inner side of the tray 14 receives the power of the drive motor 20 during the lowering operation of the motor shaft 34 tray 14 Tray conveying means (24) for linearly moving in the front and rear directions; Doors and trays of a microwave oven, characterized in that the tray guide means 32 is installed on both inner surfaces of the tray 14 and the inner wall of the cavity key 10 so that the linear movement of the tray 14 can be stably performed. Automatic switchgear. According to claim 1, The turntable rotating means 28 is a body 38 is formed with a gripping groove 36 of a predetermined depth to the tray 14 is fitted on the outer circumference, and a conical shape in the upper surface center portion of the body 38 And a engaging piece 46 having a locking groove 44 to which the inner protrusion 42 of the coupling boss 40 protruding from the center bottom surface of the turntable 12 is formed on the outer circumferential edge thereof. The bearing 48 is installed in a concentric manner on the upper and lower surfaces of the 36 to reduce frictional resistance with the upper and lower surfaces of the tray 14, and is formed to have a constant depth from the central bottom of the body 38. Door and tray automatic opening and closing device of the microwave oven, characterized in that consisting of a motor shaft insertion groove 52 formed with a random rotation prevention groove (50). The method of claim 1, wherein the drive motor clutch means 22 is protruded from both sides of the upper surface of the bracket 30 fixed on the receiving groove 26 on the bottom surface of the cavity 10, the inner side to always act upwards. The elastic member 56 is accommodated and installed, the upper surface of the elastic member storage piece 60 is formed with a guide hole 58 of a predetermined size, and the drive motor 20 is fixed to the predetermined position on the upper surface, each of the above A guide protrusion 62 protrudes at a position corresponding to the guide hole 58 on the elastic member storage piece 60, and a driving rod insertion groove 64 is formed between the guide protrusions 62 in the front-rear direction. The motor fixing piece 66 is fixedly installed in the accommodating groove 26 at the front intermediate position of the driving motor fixing piece 66, and the driving motor is fixed to the tip of the operating rod 68 protruding from the inside thereof. In accordance with the application of the tray opening signal in the state where it is fitted into the push bar insertion groove 64 on the piece 66, Door and tray automatic opening and closing device of the microwave oven, characterized in that consisting of a solenoid 72 is fixed to the push rod 70 to lower the driving motor fixing piece 66 while operating in the base. 2. The tray conveying means (24) according to claim 1, wherein the tray conveying means (24) is fixed to a first vertical bevel gear (74) fixed on the motor shaft (34) of the drive motor (20) and to a predetermined position of the receiving groove (26). An electric gear 76 which is installed on the bracket 32 in a rotatable position and rotates in engagement with the first vertical bevel gear 74 when the driving motor 20 is vertically lowered according to the application of a tray opening signal; Feeding rack 78 formed in the longitudinal direction on one side inner surface of the tray 14, between the electric gear 76 and the conveying rack 78, the rotational shaft 80 and the rotational shaft is installed in any position rotatably (80) a second vertical bevel gear (82) fixedly coupled to the upper part and engaged with the electric gear (76), and fixed to the lower part of the pivot shaft (82), and a transfer gear that is fixedly engaged with the transfer rack (78); Door and tray automatic opening and closing device of a microwave oven, characterized in that consisting of (84). The guide member (92) of claim 1, wherein the tray guide means (32) is fixedly formed on a rear inner wall of the cavity (10) and has a guide groove (90) formed on its left and right sides along its longitudinal direction. And a guide rib 94 protruding in a longitudinal direction at predetermined positions on both inner surfaces of the tray 14 and sliding in a state of being fitted into the guide groove 90 on the guide member 92. Automatic opening and closing door and tray of microwave oven. According to claim 1, At the rear inner wall predetermined position of the cavity key 10 is provided with a tray storage sensor 96 for detecting the completion state of the tray 14 to block the current flowing to the solenoid 72 Automatic opening and closing door and tray of the microwave oven. 5. The driving motor (20) according to claim 4, wherein the electric gear (76) is pivotally coupled to the upper end of the bracket (30 ') and the driving motor (20') fixedly coupled to one end of the rotating shaft (80 '). The first horizontal bevel gear 86 engaged with the first vertical bevel gear 74 fixed on the motor shaft 34 when being lowered, and fixed to the opposite end of the rotation shaft 80 ', The second horizontal bevel gear 88 is rotated along the rotational direction of the first horizontal bevel gear 86 while being engaged with the bevel gear 82 to transmit its power to the second vertical bevel gear 82. Automatic opening and closing doors and trays of microwave ovens.