JPS6039943B2 - Door opening/closing device for refrigerators, etc. - Google Patents

Description

[Detailed description of the invention] [Field of application of the invention] The present invention relates to a door opening/closing device for a refrigerator or the like.

Conventional door opening/closing devices for refrigerators, etc. have devices that manually open the door at a small set angle and then use spring force to open the door, or vice versa. When the door is rotated in the closing direction, there is a device that closes the door using spring force or the like. However, since they each have only one function, a large force is required to resist the spring force when closing the door-opening device or opening the door-closing device. Also,
There was a problem in that if the hand was released before it was completely closed or closed, it would return. The present invention is based on the above. That is, a door is rotatably attached to the main body by a pivot pin holder and a pivot pin, a cam is fixed to the door and rotatably attached to the pivot pin, and a cam is mounted on the side of the cam. A door opening emotional groove and a door closing emotional groove formed, a plurality of lotus passage grooves extending between the two uterine movement grooves, one end of which is rotatably attached to the main body, and the other end of which is rotatably attached to the main body; a push plate that is connected to the main body through the door and has a saddle portion that is pressed into contact with either the sliding grooves or the lotus groove, and the sliding groove for the door is in a position when the door is fully closed. The door-closing sliding groove has the shortest distance to the support pin, becomes longest when the door is opened, and becomes shorter as the door opens, and the distance to the pivot pin becomes shorter as the door opens. The through groove is formed at a position opposite to the saddle part of the push plate when the door is fully opened, and at a position opposite to the shoulder part of the push plate when the door is fully opened, and when the door is opened, the saddle part of the push plate is formed to face the saddle part of the push plate when the door is fully opened. The above-mentioned problem is solved by forming the saddle portion obliquely so as to be guided by the door-closing sliding groove when the door is closed by being guided by the opening sliding groove. Embodiments of the present invention will be described below with reference to FIGS. 1 to 5.

1 is the refrigerator body, 2 is the door, and 3 is a cam that is fixed to the door 2 by a fixing member 6, and has a sliding groove 3a for opening the door and a sliding groove 3b for closing the door. The groove is divided by a partition 3d, and the partition has a groove 3c for passing both the sliding grooves.

If the angle of the sliding groove 3a is 0 when the door is closed, the angle from 0 to 82 is the loss groove 3a located at the upper part of the lotus groove 3c, and the 0 angle part is the closest to the center of rotation among the sliding grooves 3a. close. and,
From angle 82 to angle 8, the lubricating groove has an inclination that becomes farther from the center of rotation as it approaches angle a, and after angle 8, it maintains a certain distance from the center of rotation until the final position. There is. The sliding groove 3b is located below the sliding groove 3a, and the distance to the rotation center of the angle 83 part is the same as the distance to the rotation center of the angle a of the sake groove 3a, and the angle 0. The part is the sliding groove 3
The distance between the angle 0 part of a and the center of the inlay is the same, and the angle a
As the angle approaches 0 from 3, the sliding groove 3b has an inclination that becomes closer to the center of rotation. Reference numeral 4 denotes a pivot pin receiver, which fixes a pivot pin 5 that rotatably supports the door 2 and the cam 3.

Reference numeral 7 denotes a push plate, which has a saddle portion 7a that presses against the cam 3, and has one end attached to the refrigerator main body 1 via a support shaft 8, a receiving member 9, and a spring 10 so as to be movable vertically and horizontally, and the other end. It is attached so that it can be pulled toward the main body via a tension spring 11.

Thereby, the supporting portion 7a is brought into pressure contact with the cam 3. In addition, when the door is closed in Fig. 3, the lotus groove 3 located at an angle of 0
Since the contact portion 7a is in pressure contact with the left side of the door 2, the door 2 is in pressure contact with the refrigerator body 1 side. 12 is a cover.

The large arrow in FIG. 5 indicates the rotation direction of the cam, and the small arrow indicates the position of the twill portion 7a. A solid line arrow indicates the movement when the door is opened, and a dashed line or a dashed line arrow indicates the movement when the door is closed. In this device, when the closed door 2 is manually opened by an angle a2, the cam 3, which is integrally fixed to the door 2 by the fixing member 6, is rotated together. As a result, the holding plate 7a of the push plate 7, which was in pressure contact with the lotus groove 3c that is bent at an angle of 0,
It comes into contact with the slope of the partition 3d and is pushed up to the angle 82 position of the Numakin groove 3a. Then, due to the tensioning force of the tension spring 11, the sliding groove 3a pressed by the supporting portion 7a is rotated from an angle of 82 degrees to 45 degrees, and the cam 3 is rotated. As a result, the door opens at 45 degrees, and the bushing part 7a falls into the lotus groove 3c provided at the 45-degree part. Moreover, when you open the door,
The saddle portion 7a is pushed obliquely upward from the position of the lotus groove 3c by the neck slope of the partition 3d, and comes into contact with the sliding groove 3a. When the door is opened to the 90 degree position, it falls back into the Liaoyuan ditch 3c. Furthermore, even if you release your hand from the door between 45 degrees and 90 degrees, there is no slope in the sliding groove 3a, so
The cam 3 does not rotate and the door 2 remains stopped. The same applies to temperatures between 90 degrees and 220 degrees.

Also, if you apply force in the direction of closing the door from a 45 degree position,
The support part 7a that was in contact with the lotus remains 3c is located in the swamp ditch 3b. Then, the twill portion 7a presses against the head slope of the sliding groove 3b, so the cam 3 rotates, and the abutting portion 7a presses against the head slope of the sliding groove 3b.
It is located at the 0 degree position, and then located at the lotus groove 3c. 9
A support part 7a is provided in the lotus groove 3c between 0 degrees and 220 degrees and the sliding groove 3a or 3b that does not have a forehead slope between 45 degrees and 220 degrees.
In order to close the door when they are in pressure contact, it is sufficient to manually close the door until the sliding groove 3b at the 45-degree position is located at the contact portion 7c.

That is, if the abutment part 7c is positioned at a 45 degree position of the sliding groove 3b, the corresponding twill part 7c presses against the forehead slope of the sliding groove 3b, so that the cam 3 rotates to the 0 degree position. The saddle portion 7a is located in the lotus groove 3c at the 0 degree position. In addition, if you open the door a little, the door will fully open due to the spring force, and if you apply a small amount of force in the direction of closing the door, the door will fully close due to the spring force. The entire length of the sliding grooves 3a' and 3b' may be beveled as shown in FIGS. 6 to 8. Next, the compression spring 13 shown in FIG.
If you use , opening and closing will be quick. Furthermore, the spring 1
If the push plates 1 and 13 are strong, it is desirable to use a push plate 7'' with a strong shape like the fishing shape shown in Figure 10. Both the opening and closing operations can be performed reliably.As described above, the present invention has made both the opening and closing operations of the door smooth and reliable using the spring force.

[Brief explanation of drawings]

Fig. 1 is a schematic front view of the door opening/closing device according to the present invention, Fig. 2 is a sectional view taken along line AA of the cammuth shown in Fig. 1, Fig. 3 is a sectional view taken along line BB in Fig. 1, and Fig. 4 C represents the cam shape shown in Figure 1.
-C sectional view, FIG. 5 is a side development view explaining the relationship between the cam and the saddle part of the push plate, and FIGS. 6 to 8 are different doors of the present invention from those shown in FIGS. 2 to 4. Diagram showing the switchgear,
FIG. 9 is a sectional view taken along line AA of the device of the present invention using compression springs in the embodiment shown in FIG. 1, and FIG. 10 is an explanatory sectional view of a push plate used in the present invention, which is different from FIG. . 3...Cam, 3a...Sliding height for door barrier,
3b...Sliding groove for door closing, 3c...Lotus passage groove,
3d...Partition, 7, 7', 7r...Press plate, 7a, 7
a', 7a''...Contact part, 8...Spring koji, 10...Spring, 11...Tensile spring, 1
2...Cover, 13...Compression spring, 1
4...Spring receiver part, 15... Spring storage part. Qin diagram Ax 28 Younger brother 3 diagram Younger brother Mu diagram Hata s Kanki et al.

Claims (1)

[Scope of Claims] 1. A door rotatably attached to the main body by a pivot pin receiver and a pivot pin, a cam fixed to the door and rotatably inserted into the pivot pin, A door opening sliding groove and a door closing sliding groove formed on the side surface of the cam, a plurality of communication grooves communicating between the two sliding grooves, and one end rotatably attached to the main body. and a push plate having an abutting portion that is connected to the main body via a spring and the other end is pressed against either of the sliding grooves and the communication groove, and the sliding groove for opening the door is The distance to the pivot pin is the shortest when the door is fully closed.
In addition, the door-closing sliding groove, which is once longest when the door is opened and becomes shorter as the door is opened, has a shorter distance to the pivot pin as the door is closed. The communication groove is formed at a position facing the abutting part of the push plate when the door is fully closed, and at a position facing the abutting part of the push plate when the door is fully opened, and the communication groove is formed at a position facing the abutting part of the push plate when the door is fully opened. 1. A door opening/closing device for a refrigerator or the like, characterized in that the contact portion is formed obliquely so as to be guided by a sliding groove for opening the door, and when closing the door, the contact portion is guided by the sliding groove for closing the door.