JPS585497A - Electric fan - Google Patents

Abstract

PURPOSE:To adjust the swing position and the swing angle of a fan by revolving a swing motor normally and reversely evenytime the motor is actuated, and controlling the time of actuation in both normal and reverse revolution. CONSTITUTION:When a swing switch SW3 is closed, the transistors Q1 and Q2 of a nonstable multivibrator AM are brought into conduction alternately at the time interval controlled by variable resistors VR1 and VR2, and triacs SCR1 and SCR2 are brought into conduction alternately in the equal time, then a swing motor 8 repeates normal and reverse revolution alternately at the equal time interval. As the number of revolution of the swing motor 8 is large, the deceleration, is perform through a reduction gear, and the torque is increased to be used for swinging movement. When the swing motor 8 is revolved, and the projection 12 of a cam 11 performs the circular movement as shown by a locus 15, a fan 5 etc. are revolved by an angle theta around a spindle 3, as the projection 14 on the neck piece 2 which is connected through a rod 13 is rotatably installed onto a neck piece 2.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electric fan in which the swing position and swing angle can be electrically adjusted.

There is an electric fan that is equipped with a dedicated oscillating motor separate from the fan motor that drives the fan, and the oscillating motor causes the fan to reciprocate from side to side when blowing air. In this type of electric fan, the swing angle has conventionally been adjusted by mechanically changing the rotational fulcrum position. However, recently, with the advent of wireless remote control, etc., this mechanism has become extremely complex, requiring the addition of electrically actuated means such as electromagnetic magnets. The drawback was that the production costs were also high.

The present invention solves these conventional problems and provides an electric fan whose swing position and swing angle can be controlled extremely easily by electrical means, and which is suitable for operation control using a wireless remote control or the like. With the goal.

Hereinafter, the present invention will be described in detail with reference to the illustrated embodiments.
Figures 1 and 2 illustrate the swinging mechanism of an electric fan. 1 is a stand, 2 is a neck piece, and a support frame 4 is rotatably supported by the neck piece 2 via a spindle 3. The support frame 4 has a fan 5 and a fan motor 6.
, a fan guard 7, a swing motor 8, a motor cover 9, etc. are attached. Attach a reduction gear to the swing motor 8□
A cam 11 is fixed to the rotating shaft 10 that interlocks with the rotary shaft 10, and one end of a iron 18 is pivotally connected to the free end of the cam 11 via a protrusion 12. The other end of the rond 18 is pivotally connected to the protrusion 14 of the neckpiece 2.

FIG. 8 illustrates the control circuit. In Figure 8, A, C
is an AC power supply, 11'U is a current fuse, swl is a timer switch, and swB is a changeover switch that changes the fan motor 6 to light, medium, or strong wind.Connect this changeover switch sw2 to either light, medium, or strong wind. Switch S only when
W2' is configured to be closed (ON) in conjunction. C1 is a capacitor for the fan motor 6, C2 is a capacitor for noise prevention, C8 is a capacitor, R is a resistor, Dl
is a diode. swB is a swing switch that closes (
o At the time of (N), the oscillating motor 8 is energized and the fan 5 etc. oscillate left and right around the spindle 8. AM is an astable multivibrator with resistors R2, RB, R
4, variable resistor VRI, VR2, :l:/capacitor c4. C
5. Transistor Q1. Q2, diode D2. It is composed of DB etc. resistances R2 and Rg, capacitors C4 and C5, transistors Q1 and Q2, diode D
2 and D8 have the same value, and the variable resistance v
R1 and VB2 can be adjusted in conjunction so that they have the same resistance value. 8CR1.

5CR2 is a triac for forward and reverse rotation of the swing motor 8 (
(bidirectional thyristor), in this case each trial 5
Approximately 0.7VRrCa(-0,'1VR2C6
) pulse currents flow alternately, which causes each triac sCR1°5CR2 to conduct alternately.

The swing motor 8 uses a capacitor run induction motor equipped with a capacitor C6.

Next, the effect will be explained. Now close the swing switch BW8 (
ON), the transistor Q le Q 2 of the astable multivibrator AM becomes conductive alternately at the time interval adjusted by the variable resistor VR1°VB2, and the triac 5C
Since RI and BCR2 are alternately conductive for the same time,
The swing motor 8 alternately repeats forward and reverse rotation for the same amount of time. Since the swinging motor 8 rotates at a high speed, it is decelerated through a reduction gear and the torque is increased to be used for swinging.

The swing motor 8 rotates, and the protrusion 12 of the cam 11 moves along the trajectory 1.
5, when the protrusion 14 of the neckpiece 2 connected by the rondo 18 tries to move in a semicircular manner from point A to point B in Fig. a, this protrusion 14 The fan 5, fan motor 6, fan guard 7, etc. are attached to the neck piece 2 in a semicircular manner, and the spindle 8 is rotatably attached to the neck piece 2. It rotates by the swing angle θ. That is, when the swing motor 8 rotates, the fan 5, fan motor 6, fan guard 7, etc. reciprocate between C-9 (angle θ) to perform the swing operation. When the swing motor 8 is rotated in the forward and reverse directions, when the time is short, the swing motion is performed by reciprocating between angles α'r and l-F, for example. If you increase the time span, for example, F-)C→D-
You will have to repeat the swinging motion from IC to F to C...

This time width may be adjusted by interlocking the variable resistors 'VR1 and VRg. Therefore, when the variable resistors VR1 and VRg are adjusted in conjunction, the pulse generated by the astable multivibrator AM changes, and as a result, the swing position and swing angle change. In this case, if there is a difference in the number of rotations between forward and reverse rotation of the swing motor 8, the rotation speed may be increased.

In the embodiment, a capacitor run induction motor is used as the oscillating motor 8, but an inductor type motor may also be used as long as it can be electrically operated for forward and reverse rotation.

Further, the control circuit is not limited to that shown in FIG. 3, but uses a microcomputer circuit to apply a forward/reverse signal as shown in FIG. A swinging motion may also be performed. However, in this case, it is assumed that the start is from the center of the swing. In this way, it is possible to send comfortable wind close to random natural wind to the person 16 who is in front of the fan, and it is possible to provide a very useful fan. That is, according to Figure 4, %
``If the rotation speeds of forward and reverse rotations differ depending on the time of a, c and d%e and f, the swing position will gradually shift.Normally, it is better to equalize the rotation speeds of forward and reverse rotations, It's also interesting to intentionally create a difference and create a random wind so that the swing position shifts.

As is clear from the above description, the present invention adjusts the swing position and swing angle by rotating the swing motor in forward and reverse directions and controlling the energization time during forward and reverse rotation. Compared to the conventional mechanical adjustment method, the configuration is extremely simple, it can be implemented at low cost, and it is very practical for wireless remote control.

[Brief explanation of the drawing]

Fig. 1 is a schematic diagram of the head of an electric fan showing one embodiment of the present invention, Fig. 2 is a schematic explanatory diagram of its oscillation mechanism, Fig. 8 is a circuit diagram of its control circuit, and Fig. 4 is a schematic diagram of an electric fan head showing an embodiment of the present invention. A time chart showing the embodiment, FIG. 5 is an explanatory diagram of the swinging motion based on FIG. 4D. 8 Nissindle, 5: Fan, 6: Fan motor, 8:
Oscillating motor, 18: rod, sw2: selector switch, sw3: oscillating switch, AM: astable multivibrator, 8CR1, 5CR2: triac. Applicant: Sharp Corporation Agent Tsunehisa Nakamura

Claims (1)

[Claims] In electric fans equipped with an oscillating motor separate from the fan motor that drives the fan, the oscillating motor is rotated forward and backward each time it is energized, and the oscillating position and angle are controlled by controlling the energization time during the forward and reverse rotation. An electric fan characterized by being adapted to adjust.