JPH0347184Y2 - - Google Patents

Description

[Detailed Description of the Invention] Technical Field of the Invention The present invention relates to a damper device for opening and closing an opening such as a cold air outlet.

BACKGROUND ART For example, inside a refrigerator-freezer, a passage is formed for sending cold air cooled by a cooler into a freezer compartment or a refrigerator compartment, and a buttful is provided at the opening of the passage so as to be openable and closable. This baffle opens and closes depending on the temperature change inside the refrigerator, and functions to send cold air cooled by the cooler into the freezer compartment or refrigerator compartment when necessary.

By the way, this buttful is usually supported by a support shaft at one end so that it can be opened and closed, and from the viewpoint of ease of assembly and disassembly, it can be separated from the part that supports it, that is, the frame. It is prevented from coming off by a full stopper provided on the frame side.

When this damper device is installed inside a refrigerator or the like, icing occurs on the parts that come in contact with cold air. In particular, if ice forms between the buttful and the buttful stopper, the opening and closing operations of the buttful cannot be performed due to the rotational force of the motor drive section, which causes failures.

Purpose of the invention Therefore, the purpose of the invention is to prevent icing between the buttful and the buttful stopper that restricts its movement, and to prevent icing from forming on that part.
The goal is to be able to drive the Batsuful with a small amount of force.

Summary of the invention Therefore, the present invention forms a curved surface on at least one of the abutting parts of the buttful and the buttful stopper, and brings the buttful and the buttful stopper into line contact by the curved surface. Or, they are brought into contact in a point contact state. Due to the relationship of contact over such a small area, even if ice forms in that area, the ice can be easily melted.

Configuration of the Embodiment First, FIGS. 1 and 2 show the overall configuration of a damper device 1 of the present invention. This damper device 1 is assembled by a frame 2, a buffer 3, and a motor drive section 4, which are separable from each other.

The frame 2 is made of plastic, for example, and is formed into a plate shape as a whole, and has an opening 5 formed approximately in the center thereof, and a supporting plate 6 integrally formed in the downward extension of the opening 5. . The opening 5 is surrounded by a rising wall 7 that is integrally provided along the edge of the opening, and the end face of the rising wall 7 is connected to a gasket 8 attached to the opposite surface of the buttful 3. Compatible. Note that the outer rising portion 7a of this rising wall 7
As shown in an enlarged view in FIG. 3, the surface is curved and has a shape that makes it difficult for ice to form. Furthermore,
The curved surface makes it easy to remove ice even if it forms.

Further, a thick pedestal 9 for mounting is formed approximately at the center of the left and right sides of the frame 2 and at a lower portion thereof. As shown in FIG. 4, on the mounting surface side of the frame 2, an opening 5 and a pedestal 9 are left, and a gasket 10 which is slightly thicker than the opening 5 and the pedestal 9 is pasted with a suitable adhesive or the like. Further, ribs 11 for draining water are integrally formed on the surface side of the baffle 2 with an incline that rises and is higher on the side of the wall 7 and lower on the outside.

The support plate 6 also has a pair of left and right bearings 12 and a buttful stopper 13 on the mounting side of the buttful 3, and a mounting seat 15 and a stopper 16 for the leaf spring 14 below the buttful stopper 13.
mounting seat 17, screw hole 37 and press pin 1
8 protrusion holes 19 are integrally formed.

As shown in FIG. 5, the pair of bearing parts 12 are formed in an inverted U-shape, and form a semicircular bearing surface 20 inside thereof. These two
One of the two bearings 12 is formed at the edge of the support plate 6, and the other is formed slightly inward from the edge of the support plate 6. The inside of each bearing part 12 is fitted with a pair of bearing protrusions 23 integrally formed on the case 22 of the motor drive part 4 through a fitting part 21 formed of a rectangular hole or groove. There is. Note that this bearing projection 23 integrally forms a bearing surface 24 having a larger radius than the bearing surface 20 described above. These pair of bearing surfaces 2
Reference numerals 0 and 24 are for rotatably supporting a support shaft 25 formed in a cantilevered state on the side surface of the support plate 6 of the above-mentioned Batsuful 3, and are erected on the opening surface of the opening 5. A long bearing hole 26 is formed in the direction of the perpendicular line.

On the other hand, the motor drive section 4 is connected to the case 22.
The rotational force of the motor 27 attached to the rear side is converted into reciprocating linear motion by the internal reduction gear and end cam, etc.
It is transmitted to the pressing pin 18. This pressing pin 18 is fitted from the outside into a guide tube 28 formed integrally with the case 22, and has a hemispherical pressing surface 29 at its tip, as shown in FIG. It is designed to come into contact with a contact surface 30 formed by a cylindrical depression formed on the opposing surface of the baffle 3. Further, this case 22 has a screw receiving portion 31 that fits inside the mounting seat 15 and a plurality of screw holes 32 for mounting formed at appropriate positions.

Moreover, the above-mentioned buttful 3 integrally forms a cantilevered support shaft 25 on one side of a support plate 33 extending downward. This support shaft 25 is connected to the bearing portion 1
2, and is inserted into the bearing hole 26 from the small diameter portion at the tip. In the fitted state, the large diameter portion 36 at the base end of the support shaft 25 abuts the side surface of the bearing portion 12 and the bearing protrusion 23 at its end surface. One support plate 33 is the seventh support plate 33.
As shown in the figure, a cylindrical buttful stopper 1
3 forms a flat contact surface 34. In this way, a cantilevered support shaft 25 is provided protruding from one side surface of the baffle 3, and an abutment surface 34 is formed on the other side surface. Note that an escape hole 35 is formed in this support plate 33 portion. This escape hole 35 is formed to allow the stopper 16 and the mounting seat 17 to protrude toward the back side of the buffle 3 and to prevent cold air from pooling.

Now, the frame 2 is applied to the case 22 of the motor drive unit 4 on the back side of the support plate 6, and the mounting screws 38 are inserted into the screw holes 37, 32.
be integrated by screwing them together. When the frame 2 and the motor drive section 4 are combined in this manner, a rectangular bearing hole 26 is formed by the bearing surfaces 20 and 24. In addition, when these are combined, the bearing protrusion 23 is combined inside the bearing part 12, and the mounting seat 15 is also assembled.
By fitting the screw receiving part 31 into the inside of the frame 2, positioning of the frame 2 and the motor drive part 4 is performed when the motor drive part 4 is attached.

In such a combined state, the press pin 18 is inserted into the guide tube 28, and then the support shaft 25 of the buttful 3 is inserted into each bearing hole 26 from the side, that is, from the left side to the right side in FIG. It is inserted in the direction of At this time, the buffing 3 is performed in a state substantially perpendicular to the support plate 6. Therefore, at the time of this assembly, the buffle stopper 13 is in a position where it does not hinder the movement of the buffle 3 in the combination direction. When the support shaft 25 is completely fitted into the bearing hole 26, the buttful stopper 13 is rotated in a direction parallel to the frame 2.
As shown in FIG.
The movement in the direction of withdrawal is regulated. Further, in this state, the pressing surface 29 of the pressing pin 18 faces the inside of the contact surface 30 of the buttful 3, as shown in FIG. In this state, attach the stopper 1 to the mounting seat 17.
6 is attached with a set screw 39 or the like.
This stopper 16 restricts the maximum opening degree of the buttful 3 by coming into contact with the peripheral edge of the escape hole 35.

Finally, the leaf spring 14 is attached to the mounting seat 15 with the set screw 40. This set screw 40 serves to fix the leaf spring 14 and at the same time fix the frame 2 to the support plate 6.
As a result, the maximum opening angle of the baffle 3 is regulated. This leaf spring 14 is in contact with the back side of the buttful 3 by means of a protrusion 41 formed in the width direction, and is always in the direction of closing it, that is, in the direction of pressing the gasket 8 against the rising wall 7 of the opening 5. It is energizing. Note that the leaf spring 14 is positioned by a projection 42 formed on the mounting seat 15 and a positioning hole 43 formed at the base end portion of the leaf spring 14.

Effects of the Embodiment This damper device 1 is attached to an air passage of a refrigerator or the like by means of its frame 2. As already mentioned, the press pin 18 receives the rotational force of the motor 27 and performs reciprocating movement in the axial direction. When the pressing pin 18 is depressed, the buttful 3 receives the urging force of the leaf spring 14 and presses the gasket 8 on the front side against the end face of the rising wall 7 of the opening 5, that is, the opening face. At this time, the spindle 2
5 is in a state where it can move in the long direction inside the bearing hole 26, so the packing 8 of the buttful 3
is completely parallel to the opening surface of the rising wall 7, and the opening 5 is sealed.
Therefore, even if a non-planar distortion occurs due to the attachment of the frame 2 to the opening 5, or a depression is formed in the contact area of the gasket 8 that is not parallel to the opening surface, the support shaft 25 is in a state where it can move inside the rectangular bearing hole 26,
The gasket 8 of the buttful 3 conforms to the opening surface of the opening 5 and is always in a state of being able to seal it.

In this state, if the internal temperature of the refrigerator compartment rises,
Since a drive current is applied to the motor 27, the motor 27 uses its rotational force to push out the press pin 18, resist the biasing force of the leaf spring 14, and rotate the buff full 3 in the opening direction. At this time, the press pin 18 comes into contact with the abutment surface 30 of the buttful 3 in a state close to rolling contact with the hemispherical press surface 29 at its tip, so that wear at that portion is reduced.

During this opening operation, if there is ice buildup near the buffle stopper 13 and the contact surface 34, the opening operation of the buffle 3 must be performed while destroying the ice buildup. In this case, the full stopper 13 is located close to the support shaft 25, and the point of application of the external force, that is, the position of the press pin 18, is sufficiently far away from the support shaft 25, so that , a large force can act on the icy portions of the buff-full stopper 13 and the contact surface 34. Therefore, even if ice forms on that part, the buttful 3 can be opened and closed with a light force, that is, even with a small torque of the motor 27. In addition, a large diameter portion 36 is interposed between the bearing portion 12 and the support plate 33, and a space where icing is difficult to form is formed between the bearing portion 12 and the support plate 33.
Ice formation between the two can be avoided.

In this way, when the opening 5 is in the open state, cold air is sent into the refrigerator compartment through that opening. The cold air hits the gasket 8 of the buttful 3 and flows out to the side, but a portion of it is also released from the escape hole 35.

In such an open state, ice is likely to form around the opening 5, especially around the outer periphery of the rising wall 7. However, since this rising wall 7 rises while forming a curved surface at the outer portion, it is difficult for ice to accumulate on that portion, and even if ice does form, it is easy to remove. In addition, the icy part will melt and stand up on the wall 7.
Even if the water droplets flow down along the sides of the frame 2, they are guided outward by the draining ribs 11, so that the water droplets do not enter the central part of the frame 2, especially the motor drive part 4. .

In this way, when the internal temperature of the refrigerator compartment falls to a predetermined temperature, the motor 27 is activated again in response to an external signal, and the press pin 18 is moved back. As a result, the buttful 3 rotates around the support shaft 25 and is urged by the leaf spring 14 to close the opening 5. During such opening and closing operations, the leaf spring 14
The protrusion 41 slides against the back of the Batsuful 3, but since it is in line contact with the protrusion 41 in the width direction, local wear of the contact area is eliminated and the As a result, smooth movement can be ensured over a long period of time.

Modified Example of the Invention In the above embodiment, the buttful stopper 13 is formed only on the side surface of one support plate 33. It may be formed on the side surface of the support plate 33, or, contrary to the embodiment, it may be formed only on the side of the other support plate 33.

Further, the buff full stopper 13 of the above embodiment is
It is formed in a cylindrical shape, and with respect to the contact surface 34,
It is hitting in a line contact state. This state of line contact can also be obtained by making the buff-full stopper 13 prismatic and the abutting surface 34 an arcuate surface. In addition, the full stopper 13 and the contact surface 3
4 are both formed as cylindrical surfaces in the cross direction, since the contact relationship between them will be point contact rather than line contact, which is even more advantageous.

Effects of the invention In this invention, the contact part between the buttful stopper and the buttfull is configured as a curved surface, and the contact state between them is line contact or point contact, so icing occurs on the contact part. Because it is difficult to freeze, and even if ice does form, it is easy to melt.
The opening/closing operation of the Batsuful is not affected by icing, and smooth opening/closing operation can be ensured over a long period of time.

[Brief explanation of the drawing]

Figure 1 is an exploded perspective view of the damper device of the present invention.
Figure 2 is a side view of the device in its assembled state;
The figure is an enlarged sectional view of the opening, Fig. 4 is a side view of a part of the pedestal part of the frame, Fig. 5 is an enlarged side view of the bearing part, and Fig. 6 is an illustration showing the relationship between the pressing pin and the contact surface. FIG. 7 is an enlarged sectional view of the bearing part and a front view of the buff-full stopper part. 1... Damper device, 2... Frame, 3...
Batsuful, 4...Motor drive part, 5...Opening part,
7... Stand up wall, 8... Patsukin, 12...
Bearing portion, 13... Buttful stopper, 14...
...Plate spring, 18...Press pin, 20...Bearing surface, 21...Fitting part, 22...Case, 2
3...Bearing protrusion, 24...Bearing surface, 25...
Support shaft, 27...Motor, 29...Press surface, 30...
... contact surface, 33 ... support plate, 34 ... contact surface,
36...Large diameter portion, 41...Protrusion.

Claims (1)

[Claims for Utility Model Registration] A damper device having a buttful for opening and closing an opening, a support shaft formed in a cantilevered manner on one side of the buttfull, and a bearing portion for rotatably supporting the support shaft. A buttful stopper for regulating the movement of the support shaft in the axial direction is provided on the other side of the buttful in a part that is integrated with the bearing part, and a part of the part where this buttful stopper and the buttful come in contact is provided. A damper device characterized in that at least one of the contact portions is formed as a curved surface.