JPS62270878A - Damper for refrigerator - Google Patents

Abstract

PURPOSE:To make motor operation conformable to on-off operations of a damper at once, by making c.w. or c.c.w. rotation of a motor possible to correspond to the damper's on-off operations in a proportional manner at the time of opening or closing the damper with actuation of the motor via an interlocking member. CONSTITUTION:An arm 1 is connected to a damper A, and a base of this arm 1 is pivotally supported on a setting base 2 tightly attached to a pulse motor B free of rotation by a pin 3. And, a base end of a plate spring 4 is tightly attached to this setting base 2 by a screw 5, and a free end 4a of the plate spring 4 is forcedly pressed to the damper A, energizing it in a closing direction all the time. A reduction gear is built in the pulse motor B, and a plane cam 7 as an interlocking member, projecting upward and rotating in a horizontal direction or an on-off direction of the damper A, is attached to the decelerating drive shaft 6. And, a driven projecting part 1a having a circular surface, projectingly installed in the arm 1, is made contact with a circumferential surface of the cam 7. With this constitution, operation of the motor B is made convertible to on-off operation of the damper A at once.

Description

Detailed Description of the Invention 3. Detailed Description of the Invention [Field of Industrial Application] The present invention relates to a damper for a refrigerator used to open and close a cold air passage in the refrigerator.

[Conventional technology]

The technology disclosed in Japanese Utility Model Application No. 61-23673 is known as a device for opening and closing cold air passages in refrigerators using the rotational force of a motor. The damper is rotated in the direction, and the damper is sequentially opened and closed in accordance with one rotation of the cam.

[Problem that the invention seeks to solve]

Recently, refrigerators are required to have multiple functions, and ±
It has become necessary to control the temperature inside the refrigerator within a range of about 1℃, and in this case, it is effective to control the opening and closing of the cold air passage using a damper, but in the above-mentioned known technology, the opening and closing operation of the damper is effective. occurs sequentially with one cycle of the cam, so it is not suitable for control within a small temperature range.

The present invention has been made with attention to the above-mentioned points.
The damper is moved in the opening and closing directions at the desired set temperature position, and is stopped at an intermediate position, fully opened, and fully closed.

[Means for solving problems]

In order to achieve the above object, in the present invention, a damper is pivotally mounted to open and close freely, and forward and reverse operations of a motor are transmitted to the damper via an interlocking member, and the forward and reverse operations of the motor are proportionally connected. We adopted a configuration that corresponds to the opening or closing operation of the damper.

〔Example〕

In the drawings, A is a damper, B is a motor for forward and reverse driving, and a pulse motor is used.

An arm 1 is connected to the damper A, and the base of the arm 1 is rotatably supported by a pin 3 on a mounting base 2 fixed to a motor B. Reference numeral 4 designates a leaf spring, whose base end is fixed to the mounting base 2 with screws 5, and whose free end 4a is pressed against the damper A and is normally biased in the closing direction.

The pulse motor B has a built-in reduction gear, and its reduction drive shaft 6 has a planar cam 7 as an interlocking member that protrudes upward and rotates in the horizontal direction, which is the opening/closing direction of the damper. A driven protrusion 1 a having an arcuate surface and protruding from the arm 1 is in contact with the circumferential surface of the cam 70 . Code 8 is the duct (
a mounting flange connected to the end of the
It is formed integrally with the mounting base 2.

In the above configuration, in the state shown in FIGS. 2 and 3, the damper A is urged to the closed position by the leaf spring 4, and the pulse motor B is operated in response to a predetermined pulse signal to rotate the cam 7 in the opening direction. As a result, the damper A is opened to a desired position via the driven protrusion 1a against the leaf spring 4. When the cam 7 is rotated in the opposite direction by the pulse motor B, the damper A can be immediately operated in the closing direction from the open position. In this case, the cam 7 is
As the damper A moves away from the damper A, the leaf spring 4 drives the damper A in the closing direction. Detection of the fully closed and fully opened positions of the damper A can be easily performed by providing a stopper structure for the cam 7.

In the embodiment shown in FIGS. 3 and 4, a pinion 9 is fixed to the drive shaft 6 of the pulse motor B as an interlocking member, and a rack 10 as another interlocking member that meshes with the pinion 9 is attached to the mounting base 2'. The rack 1 is slidably supported.
The forward and reverse movements of the motor B are immediately transmitted to the opening and closing operations of the damper A through a connecting pin 11 provided between the damper A and the base 1' of the damper A with both ends pivotally connected.

〔Effect of the invention〕

As described above, the present invention includes a damper that is pivotally connected to the damper so that it can be opened and closed, and the forward and reverse movements of the motor are transmitted to the damper via an interlocking member, so that the forward or reverse movement of the cough motor is proportionally applied to the damper. Or, since it corresponds to the closing operation, the operation of the motor can be immediately converted to the opening or closing operation of the damper, and by opening and closing the cold air passage quickly and within a small range, the temperature of the refrigerator can be reduced. It has the advantage of being able to perform accurate proportional control with varying values.

[Brief explanation of the drawing]

FIG. 1 is a front view of an embodiment of the present invention, FIG. 2 is a side view of the same, FIG. 3 is a sectional view taken along the line m-m of FIG.
The figure is a central vertical sectional view of another embodiment, and FIG.
In the cross-sectional view taken along the line V-V in the figure, A... damper, B...
Forward and reverse motors, 7, 9° 10... interlocking members.

Claims (1)

[Claims] The damper is pivotally connected to the damper so that it can be opened and closed, and the forward and reverse movement of the motor is transmitted to the damper via an interlocking member, so that the forward and reverse movement of the motor corresponds proportionately to the opening or closing movement of the damper. A refrigerator damper characterized by: