JPS645113Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an oscillation device for an electric fan, and particularly relates to an improvement of an oscillation device using a reversible synchronous motor for left and right oscillation.

Conventionally, electric fans have been equipped with a oscillating device that swings the head from side to side to automatically change the direction of airflow. These oscillating devices include those that use a crank mechanism to convert the rotation of a fan motor that rotates the fan into left-right movement, and those that use a motor dedicated to oscillation to swing the fan.

In addition, there are various methods for automatically swinging the swinging device to the left and right, but the present invention focuses on this structure and uses a simple structure to automatically swing the swinging device to the left and right. To provide a shaking device for an electric fan that causes the fan to swing.

The present invention will be explained below with reference to the drawings.

Fig. 1 is a side view of an electric fan equipped with an oscillating device according to the present invention, Fig. 2 is an enlarged cross-sectional view of main parts of the oscillating device according to the present invention, Fig. 3 is a sectional view of the same parts, and Fig. 4 is a side view of an electric fan equipped with an oscillating device according to the present invention. FIG. 5 is a plan view of the same part, and FIG. 5 is a sectional view of the main part from the front.

In the drawings, reference numeral 1 denotes a stand body, which fixes a neck piece 2 so as to be movable up and down. A reversible synchronous motor (hereinafter referred to as "oscillation motor") 4 for left and right swinging is inserted into the motor hole 3 of the neck piece 2, and a board 5 is placed on top of the motor and fixed using screws 6. 7 is a screw hole.

Reference numeral 8 denotes a rear cover, inside which a motor head 9 is held, and a front cover 10 and a guard 11 are fixed to the front surface of the rear cover to surround the motor head 9.

The base plate 5 has a screw hole 12, a shaft hole 13, and contact pieces 14, 14' for changing the swing direction. The neck piece 2 also has a spring hole 15,
A spring and a ball (not shown) are inserted into the stand 16, which is attached to the stand main body 1, and is adapted to move up and down while balancing the weight of the electric motor head 9 and the like. A spindle 17 that supports the electric motor head 9 and the like is fixed to the electric motor head 9 by caulking.

In the electric fan having the above configuration, the spindle 17 holding the electric motor head 9 and the shaft 1 of the oscillating motor 4
The connection of 8 is performed as follows.

First, the spindle 17 holding the electric motor head 9 is inserted into the shaft 18 of the oscillating motor 4 built into the neck piece 2 fixed to the stand body 1. Next, the fixing screw 20 is inserted through the screw hole of the spindle 17 and fixed to the groove 19 of the shaft 18.
Screw in. At this time, the fixing screw 20 is positioned between the swing direction changing contact pieces 14 and 14' of the board 5, as shown in FIG.

Next, to explain the oscillating operation of the electric fan having the above configuration, in the above electric fan, when the oscillating motor 4 is operated, the shaft 18 rotates, and the spindle 17 fixed to this shaft 18 also rotates, so that the electric motor head The part 9 side moves to the right or left and the direction of air blowing changes.

In this state, when the motor head 9 side moves to a certain position, the fixing screw 20 comes into contact with the contact piece 14 or 14' for changing the swing direction of the board 5, and its movement is prevented. Therefore, the rotation of the oscillating motor 4 is also blocked, but since the oscillating motor 4 is a reversible synchronous motor, the rotation is reversed, and the motor head 9 also starts moving in the opposite direction to blow air. Then, when it continues to move to a certain position, the fixing screw 20 comes into contact with the swing direction changing contact piece 14 or 14' on the opposite side, and the rotation is reversed in the same manner as described above. This operation is repeated and the direction of air flow is automatically changed continuously within a certain range.

In addition, in the above embodiment, the swing direction changing contact piece 1
4 and 14' are provided on the board 5, and this contact piece 1
4 and 14' are not limited to this.

As mentioned above, in the electric fan of this invention, the spindle that supports the electric motor head side is connected to the shaft of the reversible synchronous motor for left and right swinging, which is fixed to the neck piece, and is fixed with a screw. The device is characterized by a contact piece for changing the direction of the swing which comes into contact with the neck piece when the spindle is moved up to the point where it comes into contact with the neck piece. Therefore, the number of parts constituting the air blowing direction changing mechanism is small, and its structure is extremely simple, so its practical value is great.

[Brief explanation of the drawing]

Fig. 1 is a side view of an electric fan equipped with an oscillating device according to the present invention, Fig. 2 is an enlarged cross-sectional view of main parts of the oscillating device according to the present invention, Fig. 3 is a sectional view of the same parts, and Fig. 4 is a side view of an electric fan equipped with an oscillating device according to the present invention. FIG. 5 is a plan view of the same part, and FIG. 5 is a sectional view of the main part from the front. 1: stand body, 2: neck piece, 4: oscillating motor, 9: electric motor head, 14, 14': contact piece for changing oscillating direction, 17: spindle, 18: shaft.

Claims (1)

[Scope of utility model registration request] The spindle that supports the head of the electric motor is connected to the shaft of the reversible synchronous motor for left and right swinging, which is fixed to the neck piece, and fixed with a screw, and the neck that comes into contact when this screw moves left and right to a certain position. A swing device for an electric fan, characterized in that a contact piece for changing the swing direction is provided on the neck piece side.