KR970007502B1 - Door opening device of a refrigerator - Google Patents

Abstract

When a tact signal is given to open a refrigerator, the 1st switch(sw1) is closed and the capacitor(c1) is charged with 5v instantaneously and the output of the amplifier(op1) is switched from low to high, the transistor is turned on(TR1) and the motor(5) is the turned on. When the axle of the motor(5) comes to the specific position, the 2nd switch is pressed down. As a result when the 2nd switch is opened, the capacitor(c2) is charged and thru the loop of the emitter of the transistor base, it is discharged and the motor is stopped.

Description

Opening device of the refrigerator door

1 is a state of use of the automatic opening of the refrigerator door of the present invention.

2 is an exploded perspective view showing the configuration of each part of the present invention.

Figure 3 (a) to (e) is an operation diagram showing the operation state of the disk member of the first opening means of the present invention, the guider, the locking rod and the connecting line of the second opening means in a plan view.

4 is an example of an electrical circuit diagram used in the apparatus of the present invention.

* Explanation of symbols for main parts of the drawings

1: first support plate 2: disc member

3: first protrusion 5: motor

8: hook rod 9: guider

9a: Pressing part 9b: Guide groove

9c: guide jaw 10: ball

12: rotating member 12a: stop

12b: second projection 20: connecting line

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an opening and closing device of a refrigerator door, and more particularly to an opening and closing device of a refrigerator door that can be opened and closed automatically and simultaneously in a one-touch manner.

Conventional refrigerator doors are mostly opened by the user by pulling the handle of the door.

Such a conventional refrigerator door has been troublesome when the user is carrying an object in both hands, when the user is unable to use the hand, or for a child or a handicapped person.

In addition, in general, the refrigerator door is sealed to the inside of the gasket providing the airtight state to seal the refrigerator. When the door is pulled open by the hand, the door is opened at a time and the cold air is rapidly lost.

Refrigerators are very widespread home appliances, the number of times of opening and closing in a day and the energy lost is huge.

The present invention is to solve the problems of the prior art, an object of the present invention is to provide a refrigerator door opening device that is advantageous for saving energy by reducing the loss of cold air and easily opening and closing the door of a particular portion of the refrigerator. have.

This invention has a switch which detects an open signal, and the 1st opening means and the 2nd opening means driven according to the detection signal of this switch.

The first opening means, which is driven in the initial stage of opening the refrigerator door in a sealed state, is used to separate the door in close contact with the main body by a magnet, and includes a first support plate, a spring member having a first protrusion, and the like. have.

The second opening means is for continuously opening the door once separated from the main body, and the second support plate, the locking rod, the guider formed with the pressing part and the groove, the ball and the rotation formed with the second protrusion and the stop part. It consists of members.

In addition, the first opening means and the second opening means are connected by a connecting line so that the rotational force of the second opening means is transmitted to the first opening means.

In the first opening means, the disc member and the first support plate form a hole in the center and engage the refrigerator body as fasteners such as screws.

Further, a portion of the circumference of the disc member and the edge of the support plate are connected by a spring.

This is to allow the disc member to return to its original position after rotating the predetermined angle as described below.

The support plate 1 protrusion placed on the surface of the disc member is for initial separation of the door.

That is, when the door is closed, the first protrusion is in contact with the inner surface of the door, and when the first switch SW1 operates, the door is in close contact with the main body with magnetic force by receiving the rotational force transmitted from the second opening means. It is pushed out of the main body and separated initially.

In the second opening means, the second support plate, the guider and the rotating member form a hole in the center so that the shaft of the motor passes through the second support plate and fits into the groove formed in the bottom portion of the guider, and rotates with a fastener such as a screw. Rotably join the member and the guider.

The upper surface of the guider is formed in the guide groove in an arc shape along the circumference, and a step (jaw) is formed on both sides in the radial direction of the guider to press the second switch SW2 described below. The second switch functions to cut off the power applied to the motor by the first switch.

A ball and a spring are interposed between the rotating member and the guider, and the ball moves along the guide groove of the guider, and is located at the end of the guide groove (locking jaw) to transmit rotational force to the rotating member, and the rotating member stops. By means of an elastic force of the spring, it is possible to enter the other guide groove beyond the locking jaw. In other words, the two guide grooves are sandwiched between the locking jaws. The bottom of the rotating member is formed with a groove that can support the spring.

In addition, a protrusion (stop) is formed on the edge of the rotating member to determine the open limit of the door. A second projection is placed on the upper surface of the rotating member to push the door to continue the opening operation.

A locking rod is interposed between the bottom part of the guider and the second supporting plate. The bottom of the guider is provided with steps at both sides in the radial direction of the guider so that the locking bar is temporarily caught. While the locking rod is hooked to this jaw, the rotational force of the motor is transmitted from the guider to the locking rod, which is transmitted to the first opening means via a connecting line connecting one end of the locking rod and the disc member of the first opening means.

The rotating member and the second support plate are coupled by a spring, so that the rotating member returns to its original position. In other words, after the rotating member that has been rotated by the motor and the stop part touches the main body and cannot be rotated any more, the moment the ball enters the other guide groove beyond the locking jaw of the guide groove, the rotating member becomes no-load state. The spring is returned to its original position, and at the same time, the pressing portion of the guider presses the second switch to cut off the power to the motor.

At this time, since the motor shaft is slightly rotated by the inertial force even when the power is cut off from the motor, the guider between the rotating member and the second support plate acts as a buffer between the rotating member stopped by the stop and the inertia force. That is, the ball movably coupled to the guide groove of the guider transmits the rotational force to the rotating member when the ball is located at the end of the guide groove, and when the rotating member stops, the ball enters the other guide groove beyond the locking jaw, The guider buffers rotational force due to inertia until it moves along the guide groove and is positioned at the locking jaw of the groove.

In addition, when the door is automatically opened by an arbitrary position to reduce the loss of cold air when the door is opened, the same action occurs even when holding the refrigerator door so that it is no longer opened or blocked by an obstacle.

By the buffering action by the guider, it is possible to eliminate the excessive force on the motor to extend the life of the motor, as well as to save energy by minimizing cold air loss.

Hereinafter, the present invention will be described in more detail with reference to the embodiments shown in the accompanying drawings. 1 is a state diagram of the use of the automatic opening of the refrigerator door of the present invention.

Two first switches were installed at both sides of the front lower part of the refrigerator. This is for ease of use and is not limited by number. It can be seen that the first opening means and the second opening means are attached to the lower jaw of the refrigerator.

In addition, a device using an impact sensor and a voice synthesis signal may be used instead of the touch switch.

2 is an exploded perspective view showing the configuration of each part of the present invention.

The motor 5 which is driven by the first switch SW1 and stopped by the signal of the second switch SW2 is provided, and the first opening means and the second opening means are interlocked with the motor.

The first opening means has a disc member 2 on which a first support plate 1, a spring 4 and a first projection 3 are attached. Holes are formed in the center of the disc member 2 and the first support plate 1 and fastened to the main body with screws or the like. The disc member 2 and the first support plate 1 are coupled with a spring 4. The first protrusion 3 is in contact with the bottom of the door when the refrigerator door is closed, and when the disc member 2 is rotated by the force transmitted through the connecting line 20 from the second opening means, the first protrusion 3 is the main body. Push the door in close contact with the door to separate it from the main body.

The second opening means is a rotation in which the second support plate 6, the locking rod 8, the guide part 9a and the guide groove 9b and the guide 10, the ball 10 and the stopper 12a are formed. The member 12 is provided. A hole is formed in the center of the second support plate 6 so that the shaft of the motor 5 passes, and a hole is formed in the center of the bottom of the guider 9, but is fitted in the same shape as the motor shaft. The guider 9 and the rotating member 12 are fastened to be movable by screws or the like.

The upper surface of the guider (9) has a guide groove (16) formed in an arc shape along the circumference, the screw hole at the center, and the edge (jaw) on the radial surface of both sides in the radial direction of the guider (9) There is the pressing part 9b which formed this.

In addition, the remaining part from which the center part and the circumference part were removed from the bottom part of the guider 9 becomes thinner than the thickness of the main body of the guider 9. A step (9c) is formed radially inwardly on both sides of the circumferential portion of the bottom of the guider (9), and the guide jaw (9c) is a locking rod interposed between the guider (9) and the second support plate ( 8) is temporarily engaged to transmit rotational force to the disc member of the first opening means (see FIG. 3).

A spring 11 and a ball 10 are interposed between the guider 9 and the rotating member 12. A groove for accommodating the spring 11 is formed at the bottom of the rotating member 12. The second projection 12b is attached to the upper surface of the rotating member 12. The ball 10 is movably coupled to the guide groove 9b so that the ball 10 moves the guide groove 9b. When the ball 10 is located on the locking jaw, which is the end of the guide groove 9b, it receives the force transmitted from the motor shaft and transfers it to the second projection 12b to continue the refrigerator door initially separated by the first opening means. To push the door open.

Referring to Figures 3 (a) to (e), operation states of the disc member 2 of the first opening means and the guider 9, the locking rod 8 and the connecting line 20 of the second opening means are staged. Is shown.

In the figure, the rectangular member shown by a dashed line also shows the position of the refrigerator door according to the states of the respective constituent members.

3 is a state in which the door is closed.

As shown in the figure, the disc member 2, the locking rod 8 and the guider 9 are all in the initial position.

3 (b) shows a state in which the door is initially separated by the user pressing the first switch SW1. When the first switch SW1 is pressed, the motor 5 is operated so that the guider 9 starts to rotate in the clockwise direction, and the engaging rod 8 caught on the guide jaw 9c receives the rotational force and receives the connecting line 20. The force is transmitted to the disc member (2) through. Then, the disc member 2 starts to rotate counterclockwise. Compared with FIG. 3 (a), it can be seen that the position where the connecting line is coupled on the first protrusion 3 and the disc member 2 has moved by a certain displacement. In addition, the spring 4 also increased by the displacement.

3 (c) shows a state in which the disc member 2 is returned to its original position by the elastic force of the spring 4 after the door is initially separated. That is, the locking rod 8 is moved away from the guide jaw 9c and moves along the inner circumferential surface of the bottom portion of the guider 9, and thus no longer transmits the rotational force transmitted from the motor 5.

From this time, the door is continuously opened by the second protrusion 12b of the rotating member 12. Compared with the position of the door in FIG. 3 (a), it can be seen that the door is opened more.

FIG. 3 (d) shows the continuous open operation state of the second opening means as shown in FIG. 3 (c). Here, attention should be paid to the relative positions of the stop 12a of the rotating member 12 and the pressing part 9a of the guider 9. The stop part 12a of the rotating member 12 touches the refrigerator main body and no longer rotates in the state of FIG. 3 (d), and the pressing part 9a of the guider 9 does not disconnect the power to the motor 5. One keeps spinning. When the rotating member 12 is stopped, the ball 10 goes into the other guide groove beyond the locking step that is the end of the guide groove (9b). Immediately thereafter, the pressing part 9a of the guider 9 presses the second switch SW2.

FIG. 3 (e) shows the state after which the pressing part 9a of the guider 9 presses a 2nd switch, cuts off power to the motor 5, and is thereafter. As the motor shaft is rotated to some extent by the inertia force even when the power to the motor 5 is cut off, the ball 10 moves beyond the locking step by the elastic force of the spring and moves along the other guide groove 9b to the end of the groove. The subsequent rotational force is buffered.

At this time, the door is opened to the maximum by a predetermined displacement.

In addition, while the ball 10 moves in the no-load state along the guide groove 9b, the rotating member 12 is returned to its original position by receiving an elastic force by the spring 7.

However, when the door does not need to be opened by the maximum displacement, the door can be stopped in the middle of the opening to reduce the loss of cold air. In this case, the guider 9 also acts as a buffer as described above, thus eliminating excessive force on the motor. Do not damage the motor.

4 is a circuit diagram used in the apparatus of the present invention.

When the signal is opened to open the refrigerator door, the first switch SW1 is closed, and the capacitor C1 is momentarily charged with a 5V voltage, so the output of the operational amplifier OP1 goes from low to high and the transistor ( TR1) turns on the relay to supply power to the motor 5. The motor 5 installed at the bottom of the refrigerator is connected to the refrigerator door opening mechanism. When the power is applied to the motor, the refrigerator door opening device operates to open the refrigerator door, and when the shaft of the motor reaches a specific position, the second switch SW2 is pressed. When the second switch SW2 is pressed, the motor 5 axis rotates, and at the moment of releasing the second switch SW2, the capacitor C2 is charged and then discharges through the base of the transistor TR3 and the loop of the emitter. The output of the DF / F goes high until is 0.6 to 0.7V, and the output of the DF / F is inverted from high to low until it becomes 0.6 to 0.7V or less. Since the output Q of the DF / F is connected to the transistor TR2, the high of the output causes the output of the operational amplifier OP1 to be low so as to operate the transistor to discharge the capacitor C1 so that the operation of the relay stops the motor operation. Stops.

Although the present invention has been described with reference to the drawings depicting selected embodiments of the invention, those of ordinary skill in the art will appreciate that various embodiments are not limited to the above embodiments.

According to the present invention as described above by opening the first opening means and the second opening means, the refrigerator door is automatically opened, the cold air loss can be minimized.

In addition, it provides the convenience of use to children with disabilities, such as the free hand has the effect of increasing the quality of the product.

Claims (3)

A motor 5 driven by a signal of the first switch SW1 and stopped by a second switch SW2 which is contacted when the door is opened; First opening means made of a disc member elastically installed with a first projection (3) in contact with the inner side of the refrigerator door; It has a guider 96 and a second protrusion 12b having a guide portion 96 and a pressing part 9a for operating the second switch SW2 at an appropriate position on the outer circumferential surface thereof, and an upper surface of the guider 9. Interposed between the rotating member 12 coupled to the motor 5 and interlocked with the motor 5, and the guider 9 coupled to the rotating member, so that the adhesion force is lost only when a load exceeding an appropriate limit is applied. A second opening means made of a ball 10 having an elastic spring 11 for providing an engaging force in an elastic state and sliding in the guide groove 9b; And a connecting line 20 for interlocking the first opening means and the second opening means, and the first protrusion 3 pushes the refrigerator door away from the main body by the operation of the motor 5, and the second protrusion 12b. The opening device of the refrigerator door, characterized in that to open the refrigerator door by a predetermined opening position. According to claim 1, wherein one end of the connecting line 20 is fixed to the disc member (2), the other end is fixed to the locking rod (8) having a locking projection, the locking projection of the locking rod (8) of the guider 9 Opening device of the refrigerator door, characterized in that coupled to the guide jaw (9c) formed on the bottom. The stopper 12a is formed on the outer circumferential surface of the rotating member so as to stop the operation of the rotating member 12 when the door is fully opened, and the rotating member is stopped and the driving force of the guider 9 is no load. The refrigerating door opening device, characterized in that the spring (7) is elastically installed on the rotating member (12) to return the rotating member (12) to the state before the door opening when the state.