JPS6371596A - Swing device for fan - Google Patents

Abstract

PURPOSE:To carry out slow swing motion even in the intermediate section of swing angle, by applying motion from one crank through a crank lever onto a coupling lever while simultaneously applying motion from the other crank. CONSTITUTION:Rotation of a rotary shaft 6 is transmitted from a pinion 14 to a crank 16 so as to roll a coupling lever 26 through a crank lever 22. At the same time, the rotary force of the crank 16 is transmitted through a gear 20 to a crank 17 so as to roll the coupling lever 26. When the rotary ratio between said cranks 16, 17 is set properly, swing motion can be carried out slowly not only in the vicinity of the opposite limit points of swing angle but in the intermediate section.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to an electric fan oscillation device that causes the head of the electric fan to perform an oscillating motion.

(Prior art) Conventionally, a four-shake device for an electric fan rotates a crank using the driving force of a motor that rotates the blower blades or a motor dedicated to the vibration, and the crank swings a link to generate the electric fan. It is designed to give a shaking motion to the head.

(Problem to be Solved by the Invention) However, in the case of a series of links, when the swinging link is reversed, it swings only a small amount of angle compared to the change in the rotation angle of the crank. Therefore, the head of the fan oscillates slowly near the two limit points (= 1) of the oscillation angle, and on the contrary, it oscillates quickly at the center between them.As a result, the oscillation angle There was a problem in that people who were located close to the two limit points were exposed to the wind for a long time, so the wind hit them a lot, but people who were located between them were hit by the wind for a short time, so they only hit a small amount.

The present invention was made in view of the circumstances described in 1-1 above, and its purpose is to provide a system in which a large amount of wind hits not only those who are located near the two limit points of the swing angle, but also those who are located between them. To provide an excellent electric fan oscillation device.

[Structure of the Invention] (Means for Solving the Problems) The present invention provides, in addition to a first crank rotationally driven by the oscillating drive shaft of a 1η11 wind turbine, a crank having a rotational speed different from that of the first crank. a second crank that is rotationally driven;
and one end of a crank lever is connected to one of the eccentric positions of the first and second cranks, so that the crank lever is caused to reciprocate by rotation of one of the first and second cranks, Further, one end of the connecting lever is pivotally connected to the other of the eccentric positions of the first and second cranks and one of the crank levers, and the other end of the connecting lever is slidable to the other. One end of the link is pivotally connected to the connecting lever, and the other end of the link is attached to the swinging center.

(Operation) According to the above means, the movement is applied to the coupling lever from one of the first crank and the second crank via the crank lever, and at the same time, the movement is applied to the coupling lever from one of the first crank and the second crank. Movement is also applied from the other end, and movement is applied from this connecting lever to one end of the link, which causes an irregular rocking motion in the entire link, and the swinging motion is caused by the swinging motion of the link. This occurs not only near the two limit points, but also in the middle between them.

(Example) Hereinafter, one embodiment of the present invention will be described with reference to the drawings.

First, in FIG. 1, numeral 1 is a neck piece provided at one end of the fan stand. 2 is a fan head; 3 is a cover forming the outer shell of the fan; a motor 4 is disposed in the front half of the cover 3; a stud 5, which is a central axis of oscillation, protrudes downward from the motor 4; By inserting it into the neck piece 1 and securing it appropriately, the fan head 2
It is supported so that it can swing. Here, the motor 4 has a double-shaft type with a rotating shaft 6 protruding both forward and backward, and the forwardly protruding portion of the motor 4 protrudes further forward from the front part of the cover 3, and the tip A blower blade (not shown) is attached to the part. 7 is a guard that covers the blower blade, and 8 is a tightening ring that fastens the guard.

On the other hand, reference numeral 9 denotes a gear box attached to the rear face of the motor 4 and disposed in the rear half of the cover 3. Inside the gear box, as shown in FIG. A protruding portion is located at the rear of 6, and a worm 10 is engraved on it. Reference numeral 11 denotes a worm wheel meshed with the worm 10, into which the pinion shaft 12 is inserted and engaged, and the gear box 9 of the pinion shaft 12 is engaged.
A knob 13 for controlling the stoppage of the movement is attached to the portion of the lid that protrudes in the L direction from the top or outside of the cover 3 in such a manner that it remains in the L direction. On the other hand, 14 is a pinion engraved in a part protruding further downward from the bottom of the pinion shirt 12 and the gearbox 9 located behind it as shown in FIG. A first crank 16 in the form of a spur gear rotatably pivoted to the bottom by a stepped screw 15 is engaged with teeth 16a on the outer periphery.

Reference numeral 17 designates a second crank which is parallel to the first crank 16 and similarly pivoted to the bottom of the gear box 9 by a stepped screw 18 for a rotation of +1J, and a gear 19 is integrally formed at the pivot position. are doing. Reference numeral 20 denotes an intermediate gear disposed between the gear 19 (second crank 17) and the first crank 16 and rotatably pivotally connected to the bottom of the gear box 9 by a step (-1 screw 21). It meshes with the shaft 16a on the outer periphery of the first crank 16, and at the same time meshes with the gear 19. On the other hand, 22 is a crank lever;
In this, a first elongated hole 23 is formed on one side (right side in Figure 1) of the fan-shaped expanded part, and a first long hole 23 is formed on the other side (left side in Figure 1).
A second elongated hole 24 is formed in the first elongated hole 24, and a stepped screw 25 passing through the first elongated hole 23 is screwed onto the eccentric position of the first crank 16. is rotatably and slidably attached to the first crank 16 at an eccentric position. The other end of the crank lever 22 is bent into an S-shape as shown in FIG. has been done.

Reference numeral 26 denotes a connecting lever, and one end of this is connected to the stepped screw 2 to the overhanging portion 17a, which is an eccentric position of the second crank 17.
It is pivoted to the rotation +1 function by 7.

Further, the other end of the connecting lever 26 is connected to the crank lever 2.
2 (one rotatable slide r = one end of the crank lever 22 by the J screw 28
He is attached to No. 1.

29 is a link, one end of which is fitted into a protrusion 30 formed in the middle of the bipedal connecting lever 26 to connect the presser plate 31.
The connecting lever 26 is rotatably pivotally connected to the connecting lever 26 by being electrically connected. The holding plate 31 has one end secured to one end of the connecting lever 26 by the stepped screw 27, and the other end secured to the other end of the connecting lever 26 by the screw 32. As shown in FIG. 1, the other end of the link 29 can be rotated by a screw 34 attached to a support portion 33 formed in a portion of the neckpiece 1 adjacent to the insertion portion of the stub l' 5, that is, in the center of the portrait. It is pivoted to. In this embodiment, the teeth 16a on the outer circumference of the first crank 16 and the gear 1 of the second crank 17 are
The ratio of the number of teeth to 9 is set at 3:1.

Now, in the case of the configuration as described above, when the motor 4 is energized and started, the rotating shaft 6 rotates, thereby rotating the blower blades (not shown), and at the same time, the worm 1
Rotational force is transmitted from 0 to the pinion shaft 12 via the worm wheel 11 on the condition that the knob 13 is operated so as to oscillate. The rotational force transmitted to the pinion shaft 12 is then transmitted from the pinion 14 to the outer circumference 16a of the first crank 16, which is then decelerated at a predetermined reduction ratio, and the transmitted rotation is Based on the force, the first crank 16 rotates, for example, in the direction of arrow A in FIG. Accordingly, the stepped screw 25 slides along the first elongated hole 23 of the crank lever 22 and swings one end of the crank lever 22 back and forth.
In this way, the crank lever 22 repeats one reciprocating rocking motion for each rotation of the first crank 16 about the stepped screw 18 which is the pivot point at the other end, and in addition, the connecting lever 26 is swung back and forth through the stepped screw 28 portion by the second elongated hole 24.

At the same time, the rotational force of the first crank 16 is transmitted from the teeth 16a to the gear 19 via the intermediate gear 20, thereby driving the second crank 17 to rotate in the same direction. Here, the ratio of the number of teeth between the teeth 16a and the gear 19 is set to 3=1, and therefore, the second crank 17 having the gear 19 is three times as large as the first crank 16 having the teeth 16a. That is, while the first crank 16 rotates once, the second crank 17 rotates three times. For this reason, the step (=J screw 27) or one end of the connecting lever 26 is rotated, and the connecting lever 26 rotates the other end (stepped 28 portion) to the tl-return movement of the crank lever 22 as described above. While being swayed back and forth, part 1
Part of one end 9 is rotated three times in response to the reciprocating swing. At this time, the other end of the connecting lever 26 also slides the stepped screw 28 along the second elongated hole 24 of the crank lever 22.

Here, the conventional one is equivalent to one in which one end of the link 29 is directly pivoted to the eccentric position of the first crank 16 (see stepped screw 25). In this case, one end of the link 29 is provided with a simple pivoting movement based on the rotation of the first crank 16, whereby the link 29 is pivoted to the support 33 of the neckpiece 1, which is a stationary part. A regular swinging motion is caused around the other end of the fan head 2, giving a regular swinging motion to the fan head 2.

On the other hand, in the two-leg structure, one end of the link 29 is pivotally connected to the connecting lever 26, and as described above, the one end of the connecting lever 26 moves while the other end makes one reciprocating motion. 3
Since it rotates, the link 29 is given a slow motion, and based on this, the fan head 2 is given an irregular oscillating motion.

FIGS. 4(a) to (l) represent the direct vibration motion that is irregularly performed in this way, with changes in the rotation angle of the first crank 16 of 30" in the range from 0" to 330°. After 330° ((i) in the same figure), it returns to the state of 0'' ((a) in the same figure).

Note that due to the tooth number ratio between the first tooth 16a and the gear 19, the second crank 17 rotates while the first crank 16 rotates 30 degrees.
rotates 90'. As shown in FIGS. 4(a) to 4(e), the link 29 changes the angle of the longitudinal central axis C of the fan head 2 with respect to the longitudinal central axis B of the fan stand (not shown) by the first crank. 16 rotation angle θ°
It is decreased from i)
), then increase it again at 270° ((j) in the same figure), then increase it from 300° to 330° (in the same figure (j)).
k) to (1)) are decreased, leading to a state of 00, and so on. Based on this, Fig. 5 shows how the four torsional angles of the fan head 2 change, with the horizontal axis representing the rotation angle of the first crank 16 - 11 = degrees. As is clear, the fan head 2 has a rotation angle of 0, which is a small angle with respect to the central axis B of the fan stand at the rotation angle of the first crank 16.
Between ° and 60° and between 120° and 240°・l and 30°
It faces the front central part in a wide range between 0° and 330°, that is, both limit points of the swing angle (90° and 2
70°), not only f and i, but also especially in the central part between them, the ichi-suri is performed gently. Incidentally, in FIG. 5, the state of change in the oscillation angle in the conventional electric fan is also shown by broken lines.

In this way, according to this embodiment, the fan head 2 can be gently oscillated not only near the two limit points of the oscillation angle (-J), but also especially at the center between them. From the two limit points of the swing angle, there is a large amount of j
It can be used to catch lice.

It should be noted that the present invention is not limited to the embodiment described in 1-1 and shown in the drawings; for example, as a drive source for the oscillation, instead of the motor 4 which also serves to rotationally drive the blower blades described above, a motor 4 dedicated to the oscillation may be used. It is also possible to use a motor of You can set it as appropriate. Furthermore, crank lever 2
2 may be connected not to the eccentric position of the first crank 16 but to the eccentric position of the second crank 17. In addition, in this case, one end of the connecting lever 26 It may be pivoted to an eccentric position of the crank 16 or may be pivoted to the crank lever 22. When one end of the connecting lever 26 is pivoted to the crank lever 22 in this manner, the other end is slidably pivoted to the first crank 16 or the second crank 17.

[Effects of the Invention] As is clear from the description below, according to the electric fan oscillating device of the present invention, in addition to the first crank rotationally driven by the oscillating drive shaft of the electric fan, the first crank A second crank is provided which is rotated at a different rotational speed from the crank of -13=, and one end of the crank lever is connected to one of the eccentric positions of the first and second cranks. The crank lever is caused to reciprocate by rotation of one of the first and second cranks, and the other of the eccentric positions of the first and second cranks is connected to one of the crank levers. One end of the lever is pivotally connected, and the other end of the connecting lever is slidably attached to the other end, one end of the link is pivoted to the connecting lever, and the other end of the link is attached to the center of swing. By pivoting to the oscillation angle, the swinging motion is performed not only near the limits of the swing angle, but also gently in the middle area between them. This has the excellent effect of allowing a large amount of air to reach people who are located between the two.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, and FIG. 1 is a cross-sectional bottom view of the head portion of the electric fan, FIG. 2 is a longitudinal cross-sectional rear view of the same portion along the line Figure 14-3 is a longitudinal cross-sectional rear view of the same part along the line ■-■ in Figure 1, Figures 4 (a) to () are explanatory diagrams of the swinging motion, and Figure 5 is an illustration of the swinging angle. It is a characteristic diagram showing the changes. In the figure, 2 is the fan head, 4 is the motor, 6 is the rotation shaft of the motor (oscillation drive shaft), 16 is the first crank, 17 is the second crank, 22 23 is a crank lever, 23 is a first elongated hole, 24 is a second elongated hole, 26 is a connecting lever, 29 is a link, and 33 is a support portion (swing center portion).

Claims (1)

[Claims] 1. A first crank provided to be rotationally driven by the oscillating drive shaft of the electric fan, and a second crank provided to be rotationally driven at a different rotational speed from the first crank. , a crank lever having one end connected to one of the eccentric positions of the first and second cranks and reciprocated by the rotation of the crank; and one of the eccentric positions of the first and second cranks. a connecting lever having one end pivotally attached to one of the crank levers and the other end being slidably attached to the other; one end pivotally attached to the connecting lever and the other end being a neck lever; A oscillating device for an electric fan, comprising a link pivotally attached to a oscillating center portion.