JPH0418153B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a device for tilting and raising the head of an electric fan.

[Conventional technology]

Figures 17 to 19 are, for example,
17 is a side view of the electric fan;
FIG. 18 is a longitudinal sectional view of the main part, and FIG. 19 is an exploded perspective view of the main part.

In the figure, reference numeral 61 denotes a fan head, which is composed of blades 62, a blade electric motor (not shown), a guard 63, etc. A neck support 66 and a neck piece 67, which will be described later, are attached to a support 65 erected on a base 64. It is supported through the body so that it can tilt upward and downward and vibrate its head. The neck support 66 forms the upper end of the support column 65, has parallel protrusions 66a and 66b, and has a groove 66c inside the protrusion 66a. 67 is a neck piece, which has a hole 67 for supporting the head 61 so that it can swing.
a and the body portion 67 held between the projecting pieces 66a and 66b.
b, and a shaft cylinder 67c is formed in the center thereof. 67d is an annular recess that accommodates a torsion spring 68, which will be described later; 67e is a recess formed at the opening edge of the recess 67d; 67f is a groove formed on the upper surface of the recess 67d; It is a torsion spring that absorbs torque due to unbalanced loads, and is housed in the recess 67d, with one end 68a bent in the axial direction to form the recess 67.
d, and the other end 68b is bent in the radial direction and fitted into the groove 67f. 69 is the recess 67d
It is a disc-shaped adjustment plate that is stored in the
a, a spherical protrusion 69b is formed below the protrusion 69b, an arc-shaped elongated hole 69c is formed above the hole 69a, and a locking piece 69d that engages with the recess 67e of the neck piece 67 is formed on the peripheral edge. , one end 68a of the torsion spring 68 protrudes from the elongated hole 69c. 70 is the body 67b of the neck piece 67 and the neck support 66
It is a position setting plate interposed in a non-rotatable state between the protrusions 66a, which has a hole 70a in the center, and below which a plurality of protrusions 69b are arranged on the rotation locus of the protrusions 69b of the adjustment plate 69. An engaging hole 70b is formed, and a notch 70c into which one end 68a of the torsion spring 68 is fitted is formed at the upper edge. The tip of one end 68a of the torsion spring 68 is inserted into the groove 66c of the projection 66a of the neck support 66. 71 is a neck pin inserted into the shaft cylinder 67a of the neck piece 67 through the holes 70a and 69a;
A screw 72 is screwed into the tip of the neck pin 71. By fastening the neck pin 71 and the screw 72, the neck piece 67 is pivotally supported on the neck support 66.

The conventional device for adjusting the elevation angle of an electric fan is constructed as described above, and when the head 61 is moved up and down against the force of the twist spring 68, the neck piece 67 rotates together with the adjustment plate 69 about the neck pin 71. . At this time, the protrusion 69b of the adjusting plate 69 engages with the hole 70b of the position setting plate 70, so that the neck piece 67, that is, the head 61 is held in its tilted position.

[Problem that the invention seeks to solve]

In the conventional fan depression angle adjustment device as described above, one terminal 68a of the twist spring 68 is fixed and the other terminal 68b is moved according to the movement of the neck piece 67, so the diameter of the twist spring 68 is contracted in the elevation angle operation. It moves in such a way that the diameter increases during depression angle movement. Therefore, the force relationship of the torsion spring 68 is different between the depression angle movement and the depression angle movement, and there is a problem that uniform depression angle movement cannot be performed.

This invention was made in order to solve the above-mentioned problems, and is capable of adjusting the elevation angle of an electric fan by moving a torsion spring in the same direction for both the depression angle operation and the depression angle operation, so that a uniform depression suppressing action can be obtained. The purpose is to provide equipment.

[Means for solving problems]

The depression angle adjustment device for an electric fan according to the present invention pivots a neck piece with an adjustment plate having an arc-shaped notch formed on its upper edge, and the neck piece has a hollow space and an arc-shaped length corresponding to the notch. A torsion spring is housed in the hollow space, and both ends thereof are extended through the elongated hole, and when the neck piece is in the neutral position, the end of the notch is pressed, and when the neck piece is rotated, the end of the notch is pressed. One of the terminals is pressed by the end of the elongated hole.

[Effect]

In this invention, when the neck piece rotates in one direction, one end of the torsion spring is supported and the other end moves to reduce the diameter, and when the neck piece rotates in the opposite direction, In this case, the other terminal is supported and one terminal moves to similarly reduce the diameter, and the torsion spring always deflects in the same direction.

〔Example〕

Figures 1 to 16 are views showing one embodiment of the present invention, in which Figure 1 is a longitudinal cross-sectional view of the neck piece, Figure 2 is a front view of the electric fan, Figure 3 is a right side view, and Figure 4 is a vertical sectional view of the neck piece.
The figure is an exploded perspective view of the swing mechanism, Figure 5 is a side view (partial cross section) of the support part, Figure 6 is a partially enlarged view of Figure 1, and Figure 7 is an enlarged partial sectional view of Figure 5. , FIG. 8 is a left side view of the neck piece, FIG. 9 is a front view of the spring stopper plate, FIG. 10 is a diagram explaining the principle, and FIGS. 11 to 16 are diagrams explaining the operation.

First, the overall configuration of the electric fan will be explained with reference to FIGS. 2 to 4. In the figure, 1 is a front guard, 2 is a guard ring forming the outer periphery of the front guard 1, 3 is a rear guard to which the front guard 1 is engaged and held, and 4 is stored in the front guard 1 and the rear guard 3. The blades 5 are electric motors for driving the blades 4, and the above 1 to 5 constitute the head 6 of the electric fan. Reference numeral 7 denotes a support body formed into a substantially L-shape and on which the blade motor 5 is supported; 8 a handle fixed to the upper end of the support body 7; 9 a neck piece connected to the lower part of the support body 7; 10; 11 is a holding piece that is attached to the neck piece 9 so as to be movable in the vertical direction and prevents the lower part of the guard ring 2 from escaping forward; 11 is the neck piece 9;
12 is a spindle fixed to an elevation adjustment device (described later) housed in the neck piece cover 11 and protruding downward; 1;
3 is a control box placed below the neckpiece cover 11, 14 is its case, and 15 is the case 14.
A cover 16 is a decorative panel placed on the front side of the control box 13, on which push button switches 17 are arranged. 18 is a shaft cylinder that is fitted into the case 14 and pivotally supports the spindle 12; 19 is a shaft cylinder that supports the spindle 12;
20 is an arm that is inserted into the spindle 12 and is coupled to the spindle 12 by friction via a clutch base 21; The oscillating motor is fixed in the case 14 with a screw 24, 25 is a crank fixed to the shaft of the oscillating motor 22 with a pin 26, and 27 is connected to the crank 25 at one end.
A rod is pivotally connected to the tip of the arm 20 with a screw 29 via a washer 28, and the other end is pivotally attached to the tip of the arm 20. 30 is a time switch, and 31 is a knob for setting the time. 20-30 is control box 1
It is housed in 3. And the head 6 and the above 7
- 31 constitute a main body 32 of the electric fan.

33 is a column, 34 forms the main part of the column 33, and the upper end is connected to the lower part of the control box 13, and a screw 35 is attached.
The tube body is prevented from escaping with
6 to the base 37. The base 37 consists of a bottom plate 38 and a decorative plate 39 covering the top surface thereof. 40 is a cord that supplies power to the oscillating electric motor 22, the blade electric motor 5, etc. through the bottom plate 38 and the tubular body 34.

In the electric fan configured as described above, when power is supplied to the blade electric motor 5, the blades 4 are rotated to blow air through the front guard 1.

On the other hand, when power is supplied to the oscillating motor 22, the crank 25 rotates and causes the rod 27 to reciprocate, and this interlocking movement is transmitted to the arm 20. As a result, the arm 20 swings around its axis,
Via the spindle 12 connected to the arm 20 and the neckpiece 9, the support 7 is brought into a swinging movement. This causes the head 6 to perform a swinging motion.

Further, a well-known double swing mechanism is also provided at the joint between the lower part of the control box 13 and the tube body 34, but the details will be omitted.

Next, the elevation angle adjustment portion will be explained with reference to FIG. 1 and FIGS. 5 to 16.

In FIG. 1 and FIGS. 5 to 9, 45 is a screw for fastening the lower part of the support body 7 to the back of the neck piece 9;
The support body 7 further has neck pieces 9 on both sides of its lower end.
It is inserted into a groove 9a provided in the neck piece 9 and fastened to the neck piece 9 with a screw 46. A cylindrical cavity 9b that opens to one side is provided at the bottom of the neck piece 9, and a shaft cylinder 9d having a hole 9c penetrating through the neck piece 9 is formed in the center thereof. A radially projecting guide protrusion 9e is arranged. 9f is an arc-shaped elongated hole located above the uppermost guide protrusion 9e and passing through the bottom of the cavity 9b;
9g is a plurality of pieces (3 in the figure) on the opening edge of the space 9b.
9h is a hole that is arranged below the cavity 9b and penetrates the neck piece 9; 47 is formed in a U-shape, and the spindle 12 is fixed to the bottom surface on both sides. The lower part of the neck piece 9 is inserted into the adjusting plate, which has an arc-shaped notch 47a formed at each upper edge, a hole 47b at the center of one side, and holes 47c (described later) at both sides of the lower part. 48 is empty space 9b of neck piece 9
The spring stopper plate is arranged at the opening of the spring plate, and has a hole 48a in the center through which the shaft tube 9d passes, and an arc-shaped elongated hole 48b corresponding to the notch 47a of the adjustment plate 47 above the hole 48a.
However, an engagement recess 4 that engages with the engagement protrusion 9g is provided on the peripheral edge.
8c is formed. The spring stopper plate 48 is prevented from rotating by the engagement between the engagement recess 48c and the engagement protrusion 9g, and the neck piece 9 is integrated with the spring stopper plate 48 and pivoted to the adjustment plate 47 by the bolt 49 and nut 50. held. Reference numeral 51 denotes a torsion spring which is housed in the hollow space 9b of the neck piece 9 and supported by the outer periphery of the guide projection 9e, one end 51a of which passes through the elongated hole 48b of the spring stopper plate 48, and the other end 51b which passes through the elongated hole 9f of the neck piece 9. It extends outward and reaches the notch 47a of the adjustment plate 47. Reference numeral 52 denotes a plurality of holes 4 formed on both sides of the lower part of the adjustment plate 47 and arranged in an arc with the bolt 49 at the center.
7c from the inside, the ball is formed to have a larger diameter than the hole 47c, and is inserted into the hole 9h at the lower end of the neck piece 9. During assembly, the ball 52 on the hole 47b side is inserted from this hole 47b. Reference numeral 53 is a push spring that is housed in the hole 9h and pushes the balls 52 and 52 outward, respectively. Reference numeral 54 is a screw that fastens the neck piece cover 11 to the adjustment plate 47.

That is, if the head 6 is tilted forward or backward,
The neck piece 9 rotates around the bolt 49, and a suitable return force is applied by the torsion spring 51 to perform a downward movement. First, the principle will be explained with reference to FIG.

When the torsion spring 51 is in the reference position, its both terminals 51a and 51b are as shown in FIG. 10a.
Each presses against the end of the notch 47a. During elevation movement, one terminal 51a of the torsion spring 51
rotates in the direction of arrow A, as shown in FIG. 10b, and the other terminal 51b is supported by the notch 47a. At the time of depression angle operation, the other terminal 51b of the twist spring 51
rotates in the direction of arrow B, as shown in FIG. 10c, and one end 51a is supported by the notch 47a. In this manner, the torsion spring 51 operates in the direction in which its diameter is reduced in both the elevation angle movement and the depression angle movement, and exerts a return force by deflection in the same direction.

Now, when the head 6, that is, the neck piece 9 is in the neutral position, both ends 51a, 51b of the torsion spring 51 touch the ends of the notch 47a of the adjustment plate 47, as shown in FIGS. 11 and 12. It's pressing. When the head 6 is rotated in the elevation direction, one end 5 of the torsion spring 51 is turned as shown in FIG.
1a is pressed against the end of the elongated hole 48b of the spring stopper plate 48 and rotates. As shown in FIG. 14, the other terminal 51b presses the end of the notch 47a of the adjustment plate 47. Further, when the head 6 is rotated in the direction of depression, the other end 51b of the torsion spring 51 is pressed against the end of the elongated hole 9f of the neck piece 9 and rotated, as shown in FIG. As shown in FIG. 15, one end 51a presses the end of the notch 47a of the adjustment plate 47. In this way, the torsion spring 51
exerts a restoring force by deflection in the same direction. During this time, the pressure spring 53 presses the ball 52 and the ball 5
2 engages with the hole 47c, the position of the neck piece 9, that is, the head 6, is adjusted, and the angle of elevation can be set to an appropriate value.

〔Effect of the invention〕

As explained above, in this invention, the neck piece is pivotally supported by an adjustment plate having an arc-shaped notch formed on the upper edge, and the neck piece is provided with a cavity and an arc-shaped elongated hole corresponding to the notch. A torsion spring is housed in the cavity, both ends of which extend through the elongated hole, and when the neck piece is in the neutral position, the end of the notch is pressed, and when the neck piece is rotated, one of the ends extends above the elongated hole. Since it is pressed by the end of the elongated hole, the torsion spring can be moved in the same direction during both the depression angle movement and the elevation angle movement, thereby making it possible to obtain a uniform elevation movement.

[Brief explanation of drawings]

1 to 16 are diagrams showing an embodiment of the elevation angle adjustment device for an electric fan according to the present invention, in which FIG. 1 is a longitudinal cross-sectional view of the neck piece, a cross-sectional view taken along the - line in FIG. 5, and FIG. is the front view of the electric fan, and Figure 3 is the second
The right side view of the figure, Figure 4 is an exploded perspective view of the swing mechanism,
Figure 5 is a side view (partial cross section) of the support part,
The figure is a partially enlarged view of Fig. 1, Fig. 7 is an enlarged cross-sectional view of Fig. 5, and Fig. 8 is a left side view of the neck piece.
Figure 9 is a front view of the spring stopper plate, Figure 10 is a diagram explaining the principle, Figures 11 to 16 are diagrams explaining the operation, and the first
Figures 1 and 12 are neutral, Figures 13 and 14
The figure shows the elevation angle, FIGS. 15 and 16 show the depression angle, FIGS. 17 to 19 show a conventional depression/elevation angle adjustment device for an electric fan, and FIG. 17 is a side view of the electric fan.
FIG. 8 is a longitudinal sectional view of the main part, and FIG. 19 is an exploded perspective view of the main part. In the figure, 6 is the head, 9 is the neck piece, 9b is the void, 9f is the elongated hole, 47 is the adjustment plate, 47a is the notch, 48 is the spring stopper plate, 48b is the elongated hole, 49 is the shaft (bolt), 51 is a torsion spring, 51a is one terminal,
51b is another terminal. Note that the same reference numerals in the figures indicate the same parts.

Claims (1)

[Claims] 1. An adjustment plate consisting of side walls parallel to each other and each having an arc-shaped notch formed in the upper edge of these side walls, and a lower part that supports the head of the electric fan and has a hollow space inside the lower part, and the lower part is the adjustment plate. a neck piece which is disposed between the side walls of the housing and is rotatably supported by a shaft and has an arc-shaped elongated hole at a position corresponding to the notch of the adjusting plate; When the neck piece extends through the elongated hole and is in the neutral position, it presses the end of the notch in the adjustment plate, and when the neck piece rotates, one of the terminals is pressed by the end of the elongated hole to reduce the diameter. A device for adjusting the elevation angle of an electric fan, which includes a twist spring that operates in a tightening direction.