JPS587187Y2 - electric fan stand device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a stand device for an electric fan that supports the head of the electric fan with a flexible pipe so that the angle of elevation can be adjusted.

Recently, for example, in the case of electric fans, the elevation angle of the fan head can be adjusted in a stepless manner with the aim of reducing the number of parts and reducing costs, etc. with a stand device constructed using flexible pipes. It is considered to be supported.

However, the fan head, including the blower blades and protective net attached to the front part, is used to adjust the angle of elevation, especially to adjust the angle of depression. The center of gravity is shifted rearward from the center of gravity due to the structure, and the center of gravity is relatively shifted forward from the mounting portion.

On the other hand, when a flexible pipe is bent from a vertical position, the resistance against the bending exceeds the resistance when attempting to restore the pipe to its original shape.

For this reason, if the head of a fan in the situation described above is attached to a flexible pipe in a vertical position while remaining horizontal, and its elevation angle is adjusted, in the depression angle state, the center of gravity of the fan head will shift. Since the unbalanced load acts as a force that tries to bend the flexible pipe more strongly, the flexible pipe also increases its resistance to a corresponding extent, and eventually balances out and maintains the current state. However, when the fan head is depressed, The unbalanced load caused by the shift in the center of gravity of the fan head acts as a force that tries to restore the flexible pipe, so the flexible pipe, which originally did not have much resistance to this restoration, was unable to resist it. As a result, the head of the fan, which was supposed to be in an elevated position, automatically returns to a horizontal position.

Therefore, the purpose of the present invention is to maintain the benefits of using a flexible pipe for adjusting the elevation angle, such as stepless adjustment of the elevation angle, reduction in the number of parts, and lower costs, while also providing a mechanism for the head of the fan. To provide a stand device for an electric fan that can securely hold the head of the electric fan at any elevation angle position even if the center of gravity of the electric fan is located in front of a flexible pipe attachment part.

An embodiment of the present invention will be described below with reference to the drawings.

First, in Fig. 1, 1 is a base on which a support column 2 is erected, 3 is an elevating column projecting from the support column 2, and 4 is connected and supported to the upper part of the elevating column 3 by a main body 5 of a stand device so that the elevation angle can be adjusted. As is well known, the fan head 4 includes a cover 6 containing a motor, a swing mechanism, etc. (none of which are shown), a blower blade I, a protective net 8, and the like.

The details of the main body 5 of the stand device will be explained with reference to FIG. 2. Reference numeral 9 is a connecting tube attached to the upper end of the lifting column 3 with a screw 10, and the upper part of this is connected to the lifting column 3. 3
It exists above.

11 is a round coil wire 11a and a triangular coil wire 11b
A well-known flexible pipe consisting of a combination of
Connecting cylinders 12 and 13 are respectively attached to the lower ends of the flexible pipe 11, and thus the connecting cylinders 13 are attached to the upper half of the connecting cylinder 9 with screws 10a. The upper half of the pipe 11 protrudes from the connecting tube 9.

On the other hand, 14 is the center of gravity position of the electric fan head 40 (symbol A in the figure).
A support shaft protrudes directly below the support shaft (shown in ), and a mounting body 1 that is a mounting portion for the flexible pipe 11 is located behind the support shaft.
5 is attached with a screw 16, so the attachment body 15
The center of gravity of the fan head 4 is shifted forward of the center position of the fan head 4 (denoted by center line B for convenience).

Further, the mounting body 15 is formed with a recess 17 opening downward at the lower part thereof, and a maximum depression angle position and an inclined surface 18 for regulating the maximum depression angle position are formed on the inner peripheral edge of the opening. A mounting hole 19 is formed in the upper part of the mounting hole 19, which is inclined at an angle a1 that is approximately the same as the angle of inclination a of the maximum depression angle regulating portion 18a of the inclined surface 18.

In order to connect the fan head 4 to the flexible pipe 11, the fan head 4 is first tilted at the same angle as the above-mentioned angle a1, as shown in FIG.

In this state, the mounting hole 19 of the mounting body 15 is in a substantially vertical state.

In this state, the upper end of the flexible pipe 11 with the mounting hole 19 in a vertical position is fitted into the outer circumference of the connecting cylinder 12, and the mounting body 15 is fixed to the connecting cylinder 12 of the flexible pipe 11 with screws 20. By doing so, the fan head 4
is attached to the flexible pipe 11 via a mounting body 15.

To explain the operation of this embodiment with the above configuration, the fan head 4 can be set at any angular position between the maximum elevation angle displacement position and the maximum depression angle position, for example, the angle at which the fan head 4 becomes horizontal as shown in FIG. In this position, the flexible pipe 11 is bent forward, and in this case, the unbalanced load due to the deviation of the center of gravity of the fan head 40 is on the front side and acts as a force that tries to bend the flexible pipe 11 even more strongly. However, the flexible pipe 11 also has a corresponding resistance force, and as a result, the flexible pipe 11 maintains its bent state due to the balance, thus holding the fan head 4 in its horizontal state.

When the electric fan head 4 is tilted forward from the state shown in FIG. 2 to the depressed angle state shown in FIG. 4, the flexible pipe 11 is bent further forward than shown in FIG. On the other hand, the unbalanced load also acts on the flexible pipe 11 as a force that tries to bend the flexible pipe 11 further forward, but even in this case, the unbalanced load is applied to the flexible pipe 11 accordingly. This increases the drag force which eventually balances out, and the flexible pipe 11 maintains its bent state, thus holding the fan head 4 in its depressed position.

If the fan main body 4 is further tilted forward from the state shown in FIG. It is held at the maximum angular position.

Next, when the fan head 4 is tilted backward from the state shown in FIG. 2 to reach the maximum elevation angle state, for example, the maximum elevation angle state shown in FIG. , although the fan head 4 moves further back than shown in FIG. Even if you do not give it or give it, it only acts as a force that tends to bend it slightly forward from its vertical state.

Therefore, the unbalanced load in this case is much weaker than that in the state shown in FIG. As a result, even at the maximum angle position shown in FIG. 3, the fan head 4 is reliably held at its maximum elevation angle position.

Thus, according to this embodiment, the fan head 4 having its center of gravity in front of the mounting body 15 is attached to the vertical flexible dowel 11 via the mounting body 15 in an inclined elevational state. When the elevation angle is adjusted, the unbalanced load due to the shift in the center of gravity of the fan head 40 is applied to the flexible pipe 11 as a force that tends to bend the flexible pipe 11 no matter what angle position the fan head 40 is in. In other words, it is possible to prevent the unbalanced load from acting as a force to restore the flexible pipe 11, thereby ensuring that the bent flexible pipe 11 returns to the vertical state. This allows the fan head 4 to be reliably held at any angular position.

By the way, it is conceivable that the above-mentioned effects can be achieved without the above-mentioned configuration by increasing the resistance against the force that attempts to restore the flexible pipe 11.

However, this requires increasing the size of each wire rod of the flexible pipe, which increases costs, requires considerable force to bend the flexible pipe and return it, and makes it difficult to adjust the elevation angle of the fan head. The operability is improved.

In this regard, according to the present embodiment, with the above configuration, the desired purpose can be achieved without increasing the size of each wire rod 11a, 11b of the flexible pipe 11, so there is no increase in cost. Furthermore, it is possible to prevent a decrease in the operability of adjusting the elevation angle.

As is clear from the above description, the present invention is an electric fan in which the fan head is supported by a flexible pipe so that the elevation angle can be adjusted and the center of gravity is forward of the attachment part to the flexible pipe, and the fan head is tilted in elevation. The invention is characterized in that the flexible pipe is attached to the flexible pipe which is in a vertical state through the attachment part, and thereby, the elevation angle can be adjusted stepless, the number of parts can be reduced, and the cost can be reduced. While still maintaining the effects of using a flexible pipe for adjusting the elevation angle, it is possible to reliably eliminate the occurrence of problems such as the flexible pipe returning to the vertical state due to unbalanced loads due to the shift of the center of gravity. , the head of the fan can be reliably held at any angular position, the cost can be kept low, and the operating force for adjusting the elevation angle can be kept small, making the operation easy. It is possible to provide a fan stand device that has many excellent effects.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention; Fig. 1 is a side view of the entire electric fan, Fig. 2 is an enlarged vertical sectional side view of the main parts, and Figs. 3 and 4 show the maximum elevation angle position and depression angle change, respectively. FIG. 2 is a diagram corresponding to FIG. 2 shown in position. In the figure, 1 is a base, 3 is a lifting column, 4 is a fan head, 5 is a main body of a stand device, 11 is a flexible pipe, 15 is a mounting body (mounting part), and 19 is a mounting hole.

Claims (1)

[Scope of utility model registration request] In a fan whose head is supported by a flexible pipe so that its elevation angle can be adjusted and whose center is forward of the attachment part to the flexible pipe, the flexible pipe is arranged in a vertical state with the fan head tilted in elevation. A stand device for a fan, characterized in that it is attached via the attachment portion.