JPS647274Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] This invention relates to an oscillation device for an electric fan, and particularly relates to a oscillation restriction that limits the oscillation angle.

[Conventional technology]

7 and 8 are a sectional view and an operation explanatory diagram of a conventional electric fan oscillation device disclosed in, for example, Japanese Utility Model Publication No. 37-4365.
a is a base, 2a is an electric motor, and 3a is a bearing provided on the upper part of the base, into which a spindle 4a provided on the electric motor 2a is fitted. Reference numeral 5a denotes a crank provided to transmit the rotation of the rotating shaft of the electric motor via a reduction gear, and one end of a swinging drive rod 6a is rotatably provided at an eccentric location by a pin 7a. A pin 7 8a is provided on the base 1a side and rotatably supports the other end of the swinging drive rod 6a.
This is an eccentric plate in which a is eccentrically provided.

The conventional swinging device for an electric fan is constructed as described above, and its swinging operation will be explained with reference to _{FIG .} The center of O ₃ ,
The center of the eccentric pin 7a is O ₄ , and the centers O ₁ and O ₃
If the line connecting the two is X ₁ - X ₂ and the line connecting the center O ₁ and the center O ₃ ' after the crank movement is X ₃ - X ₄ , then
By driving the crank 5a, the crank 5a rotates.
Along with this, the center O ₄ moves, and since the center O ₁ and the center O ₂ are fixed, the center O ₃ moves toward O ₃ ′. When the motor 2a reaches the center _O3 ', it moves toward _O3 , and the motor 2a swings around _O1 at angles of _X1 - _X2 and _X3 - _X4 .

[Problem that the invention attempts to solve]

In the conventional fan oscillation device as mentioned above,
The distance between the center O ₁ and the center O ₂ is long, so in order to obtain a predetermined swing angle, the center O ₃ of the crank 5a
This increases the distance between the center _O4 and the crank 5a, which increases the size of the device and is also dangerous since it is a rotationally driven part. For this reason, _the crank is made smaller by shortening the distance between center O ₁ and center O ₂ , and by shortening the distance between center _{O 3} and center O ₄ .
By shortening the distance between
The triangle (shaded part) connecting O ₁ , O ₂ , and O ₄ ' becomes elongated, and by applying a slight external force to the electric motor 2a during packaging, the swing drive rod 6a, which is formed relatively thin, bends. However, due to this and dimensional errors, the center O ₂ tends to cross over the line between the centers O ₁ and O ₄ ′ (hereinafter referred to as turnover), and when turnover occurs, there is a problem in that the swinging motion does not occur.

Furthermore, there is a problem that the mounting board may be deformed under the load and is not necessarily stable.

[Means for solving problems]

an electric motor; a mounting board to which the electric motor is attached;
A spindle provided on this mounting board, a neck piece to which this spindle is rotatably fitted and provided with an eccentric shaft, a swinging drive rod whose one end is rotatably fitted to the eccentric shaft, and this neck piece. and a crank provided on the motor side to which the other end of the swing drive rod is rotatably attached, the crank being protruded from the mounting board toward the protruding side of the spindle and configured to rotate the swing drive rod at a predetermined swing angle of the motor. 1. An electric fan with a oscillation limiting device, characterized in that a stopper is provided with which the two abut against each other, and the stopper is provided on a reinforcing plate that is provided so as to overlap the mounting board.

[Effect]

In this invention, even if an external force is applied in a direction that increases the normal swing angle, the swing drive rod will not move against the stopper and will not turn over.

〔Example〕

Figures 1 to 6 are diagrams showing one embodiment of this invention. Figure 1 is an external view showing the entire electric fan. A support 2 is installed on a stand 1, and the tip of this support 2 is A blower section 5 is fixed to an oscillating spindle 4 to which a neck piece 3 is attached and whose bearing end is inserted into the neck piece 3. FIG. 2 shows the blower section 5, in which the front part of the blower motor 6 is rotatably supported by the swinging spindle 4, and the swinging spindle 4 is rotatably supported in the rear part of the motor. A gearbox 7 incorporating a reduction gear is integrally formed. Reference numeral 8 denotes a crank spindle led out from this gearbox 7 via a reduction gear, and has a crank 9 at its lower shaft end for swinging at a predetermined swinging angle. The neck piece 3 is connected to an eccentric shaft 11 projecting from the upper part thereof as shown in FIG. 3 by a swinging drive rod 12. On the other hand, FIGS. 4 and 5 show a mounting board 13 for the oscillating spindle 4, on which the electric motor 6 is fixed by a mounting arm 14 in the state shown in FIG. Reference numeral 15 denotes a tongue-shaped stopper 1 located between both mounting arms 14 of the mounting board 13 and bent downward toward the neck piece 3 side.
6 is spotted on the mounting board 13 so as to face the oscillating spindle 4 as shown in the figure.

When the electric fan is oscillated in the above configuration, the rotation of the crank spindle 8, which is decelerated by the internal gear, rotates the crank 9, causing the oscillation drive rod 12 to perform a back and forth reciprocating motion as is well known. Since the tip of the rod 12 is rotatably supported on the eccentric shaft 11 of the neck piece 3, the rotation of the crank causes the blower section 5 to oscillate by a predetermined angle to the left and right about the spindle 4. will be done.

During this swinging motion, for example, as shown in FIG. 6, the swinging spindle 4, crank spindle 8, crank 9, and eccentric shaft 11
The positional relationship is as shown in the figure, and the distance A<B+C+
a (a: play between each connected component), the oscillating rod 12 will not cross the line connecting the axes of the spindle 4 and crank spindle 8, but
If the play a becomes large and the relationship A≧B+C+a is established due to, for example, bending of the oscillating drive rod 12 due to an external force, the rod 12 will cross the line connecting the axes of the spindle 4 and crank spindle 8 and cause turnover. Therefore, if the swinging motion is continued in this case, the front guard of the blower section 5 will collide with, for example, the stand support 2, and the normal swinging motion will not be possible.

Therefore, in this invention, the above-mentioned mounting board 13 is inserted on the above-mentioned neck piece 3, and the stopper 16 provided on the above-mentioned reinforcing plate 15 is provided on this board.
collides with this stopper 16 before it crosses the above-mentioned axis, and since the above-mentioned stopper has no relationship with the normal swing angle, the above-mentioned Even if there is a lot of play, the swinging device can be used safely for a long period of time without being damaged due to excessive rotation due to unexpected external force. Further, since the reinforcing plate 15 is spot-welded to the mounting board 13, deformation of the mounting board 13 is prevented.

[Effect of idea]

As explained above, this invention has a stopper on the mounting board with which the oscillating drive rod collides at a predetermined oscillating angle of the motor, which causes the motor to oscillate beyond the normal oscillating angle due to external force, resulting in turnover. This has the effect of preventing damage to the swinging device and malfunction of the swinging device.

In addition, since the reinforcing plate is provided so as to overlap the mounting board, it prevents the mounting board from being deformed under load, thereby ensuring that the swinging device can be used stably for a long period of time without being damaged. play.

[Brief explanation of the drawing]

Fig. 1 is a side view showing the whole electric fan of this invention, Fig. 2 is a side sectional view showing the internal structure of the head blower section, and Fig. 3 is an exploded view of the part showing the coupling relationship of the swinging drive rod. Fig. 4 is a sectional view of the mounting board portion, Fig. 5 is an exploded perspective view of the mounting board of the blower motor, and Fig. 6 is a combined arrangement diagram showing the dimensional relationship of each part during swing motion. , FIG. 7 is a sectional view of the main part showing the conventional example, and FIG. 8 is an explanatory diagram of its operation.
FIG. 9 is a reference diagram for further explaining the operation. In the figure, 3 is a neck piece, 4 is a swinging spindle, 5 is a blower section supported by the spindle, 6 is a blower electric motor inside the blower, 13 is a mounting board for this motor, 15 is a reinforcing plate, and 16 is this A stopper provided on the board is shown. The same reference numerals in the figures indicate the same parts.

Claims (1)

[Scope of utility model registration request] an electric motor; a mounting board to which the electric motor is attached;
A spindle provided on this mounting board, a neck piece to which this spindle is rotatably fitted and provided with an eccentric shaft, a swinging drive rod whose one end is rotatably fitted to the eccentric shaft, and this neck piece. and a crank provided on the motor side to which the other end of the swing drive rod is rotatably attached, the crank being protruded from the mounting board toward the protruding side of the spindle and configured to rotate the swing drive rod at a predetermined swing angle of the motor. 1. An electric fan with a oscillation limiting device, characterized in that a stopper is provided with which the two abut against each other, and the stopper is provided on a reinforcing plate that is provided so as to overlap the mounting board.