KR101931259B1 - Portable fan for improving of efficiency - Google Patents

Abstract

The present invention discloses a portable fan improved in blowing efficiency by preventing wind from scattering during blowing and ensuring straightness of the wind. The portable fan includes: blades (2) rotated by a motor; a safety net (3) including a front net (4), a rear net (5), and a side net (10) to protect the blades; and a handle (6) provided on one side of the safety net, wherein a front part or an entire of the side net (10) is closed so that the wind is concentrated and injected forward, and the side net (10) includes an extension ring (20) coupled to be withdrawn forward from the side net.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a portable fan,

The present invention relates to a portable electric fan including a blade that is inserted into a rotation shaft of a motor and is rotated, a safety net that is composed of a front net, a rear net, and a side net to protect the wing and a handle provided on one side of the safety net, The side net is constructed such that the wind generated by the rotation of the wing is not scattered on the side but is concentrated on the forward part or the whole part so as to be concentratedly injected forward, The present invention relates to a portable electric fan having improved air flow efficiency, characterized in that it has a band shape having a predetermined width to enclose the net, and an extension ring coupled to the side net in a state of being pulled forward.

Generally, an electric fan used in a home or office is a mechanical device that provides a cool wind to the users in the summer by blowing air forward from the rear by rotating the rotating blades as the motor is driven.

Recently, the use of a portable fan that is easy to carry around due to its light weight is increasing rapidly. For example, a woman with makeup may experience difficulty in cosmetic surgery due to heat from the sweat of his face due to heat, so that the use of small electric fans that can be carried in bags or bags is increasing significantly.

The conventional portable electric fan includes a safety net equipped with a wing that is rotated by being inserted into a rotation shaft of a motor, a grill for protecting wings from the front, rear, and sides of the wing, and a handle provided on one side of the safety net The safety net is provided with a spiral or straight grill so that a user, especially infants or young children, can be transferred to a windy user formed during the rotation of the wings while preventing the user from touching the wing during use of the fan.

However, in the conventional portable fan, since the front edge of the blade is opened due to such a grill, the wind formed during the rotation of the blade is scattered and can not be transmitted to far away, thereby significantly reducing the blowing efficiency. In order to feel the coolness, The battery is consumed in proportion to the rotation, so that the use time of the fan is reduced.

Korean Utility Model Publication No. 20-2016-0004060 (Portable Fan with Alarm)

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide a wind turbine bladder having a front side or a front side clogged side net to increase the wind speed, The present invention has been made to provide a portable electric fan which can be used as a portable electric fan.

According to another aspect of the present invention, there is provided a method of manufacturing a safety net comprising a blade for being rotated by a rotation shaft of a motor, a safety net for protecting the wing and a handle provided on one side of the safety net, In the portable fan, the side net is constructed such that the wind generated by the rotation of the wing is not scattered to the side but the front part or the entire part is clogged so as to be concentratedly injected forward, And an extension ring in the form of a band having a predetermined width to enclose the side net so as to enhance straightness, the extension ring being coupled to the side net in a state of being pulled out forward, In order to engage with each other, on one side of the inner peripheral surface of the side net and the extending ring, And a stopper guide groove for guiding the stopper is formed on the other surface so that when the extension ring is pulled forward or rearward of the safety net, the stopper moves along the stopper guide groove and the extension ring is pulled out or drawn .

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According to the present invention as described above, since the front side or the front side of the blade is blocked by the side net protecting the side surface of the blade, the wind can be concentratedly sprayed without scattering during the wind,

Further, since the extension ring is drawn out from the side net to enlarge the concentration area for concentrating the wind, the straightness can be remarkably improved when the wind is discharged, and the extension ring is configured to be drawn out while being rotated in the form of a spiral, So that it is possible to prevent the extension ring during use from being arbitrarily introduced by an external force.

1 is an exemplary view of a conventional portable fan;
2 to 5 are views illustrating an example of a portable fan according to an embodiment of the present invention, which improves blowing efficiency.
FIG. 6 is a schematic view illustrating a conventional portable fan and a portable fan according to an embodiment of the present invention.
7 to 8 are views illustrating an example of a portable fan according to another embodiment of the present invention, which improves the blowing efficiency.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a portable fan according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

In the present invention, the portable fan (1) includes a blade (2) which is rotated by being inserted into a rotation shaft of a motor, a safety net (3) for protecting the blade from the front, rear and side surfaces of the blade, And a handle 6 that is made of a synthetic resin. The safety net (3) comprises a front net (4) for protecting the wing from the front of the wing, a rear net (5) for protecting the rear side of the wing and a side net (10) It is a light and small fan that can be stored in a pocket or pocket and can easily carry around and provide a cool wind on the face or body area.

As shown in FIGS. 2 to 3, the side net 10 according to the present invention can prevent wind from being scattered during blowing and ensure straightness and improve blowing efficiency. As a technical feature.

Generally, the safety net of a portable fan is provided with a spiral or linear grille so that wind formed during rotation of a wing is transmitted to a user while preventing an infant or a young child from touching the wing during use of the fan, In the conventional side wall 10 'of the portable electric fan, since the front portion of the blade is opened except for the grill, the wind is scattered to the open portion during blowing, and loss is generated, so that it is not felt satisfactory (cool) .

Of course, it is also possible to see that the blowing range is increased because the scattered wind is blown through the opening portion, but the blowing efficiency is extremely low because the wind can not be seen to reach the user. In addition, if the wing is rotated more quickly to feel coolness, the battery is consumed proportionally, resulting in a problem that the use time of the fan is reduced.

Therefore, in order for the user to feel cool, it is necessary to position the fan more closely or rotate the blade faster. If the blade is rotated faster, the consumption of the battery is increased so much that the time for using the fan is shortened, Lt; / RTI >

On the other hand, since the front side or the front side of the blade 10 is blocked by the side net 10 of the portable fan according to the present invention, the wind can be concentratedly sprayed while blowing air, It is possible to use a considerable amount of time as compared with the conventional portable fan, and it is also advantageous in that it can be used comfortably with less noise.

Next, the present invention may include an extension ring 20 extending in a predetermined width from a rear edge of the front net, and extending in a manner to surround the side net and being pulled out forward.

The extension ring 20 extends the region where the wind collects and concentrates when blowing, thereby allowing the wind to pass through the side net 10 and the extension ring 20, thereby enhancing the straightness and improving the wind speed .

As shown in FIG. 4, for example, a protrusion-shaped stopper 11 is formed on the outer circumferential surface of the side net 10, A stopper guide groove 21 for guiding the stopper 11 is formed on the inner circumferential surface of the extension ring so that when the extension ring 20 is pulled or pushed, the stopper 11 moves along the stopper guide groove 21 The movement of the extension ring 20 is limited as the stopper 11 is caught by both end portions of the stopper guide groove 21.

The stopper 11 and the stopper guide groove 21 may be formed to be opposite to the outer circumferential surface of the side net and the inner circumferential surface of the extension ring, respectively. The shape of the stopper 11 and the stopper guide groove 21 Are only examples for the purpose of helping to understand the present invention, and are not limited to the scope of the present invention.

6 is a perspective view of a conventional portable fan 1 ', a portable fan 1 having a front side closure 10 with a front portion of a blade according to an embodiment of the present invention, and a side panel 10 FIG. 1 is a view showing an example of a portable fan unit 1 from which an extension ring 20 is drawn out from a portable fan unit 1 according to an embodiment of the present invention. As shown in FIG.

As shown in FIG. 6A, the side net 33 'of the conventional portable fan 1' is formed in a portion other than the grill, in particular, a front portion of the blade is opened, And the wind speed is also significantly lower.

6 (b), the portable fan 1 is provided with the side net 10 with the front part of the blade closed. The portable fan 1 prevents the side net from being scattered by the wind during blowing, It is possible to obtain the effect that the wind speed is increased by concentrating the wind in the inside.

6, the portable fan 1, in which the extension ring 20 is pulled out from the side net 10, is expanded in the region where the wind is gathered, so that the pressure increases inside and the straightness of the wind Increasing effects can maximize wind speed.

The reason why the extension ring 20 is configured to be pulled out from the side net 10 is that it is not inconvenient to carry and store and the wind speed can be selectively controlled during the use of the fan as in b) to c) So as to provide higher satisfaction.

Of course, the extension ring may be integrally formed on the front edge of the front net, but in this case, since the extension ring always protrudes outwardly, the portability is degraded and care is taken to prevent breakage of the extension ring during storage There is a problem that needs to be tilted. In addition, if the extension ring is provided, the effect of improving the wind speed can be expected. However, since the function of being able to adjust the wind speed by selectively pulling out the extension ring selectively as in the present invention is lacking, There is a problem.

As described above, the portable fan according to the present invention is superior in air volume and wind speed as compared with the conventional portable fan, and has an advantage of excellent air blowing efficiency because the air volume and the wind speed are significantly increased depending on whether the extension ring 20 is drawn or not.

Next, in the present invention, the extension ring 20 can be drawn and drawn while being rotated in a spiral form from the outer circumferential surface of the side net 10.

Referring to FIG. 5, the extension ring 20 according to the present invention has a helical groove 22 formed along an inner circumferential surface thereof, and a guide 12 engaging with the guide groove is formed on the outer circumferential surface of the side net, do. In order to facilitate understanding of the present invention, the guide 12 is shown as a helical shape so as to correspond to the guide groove. However, the present invention is not limited to the scope of the present invention. Also, although not shown in the drawing, a helical guide groove may be formed along the outer circumferential surface of the side net, and a corresponding guide may protrude outwardly from the inner circumferential surface of the extending ring.

One hand must hold the extension ring 20 and the other hand the back net 5 or the handle 6 to pull or pull the extension ring 20. If the extension ring 20 is configured to be slidably pulled out through the stopper guide groove 21 and the linear stopper guide groove 21 as shown in Fig. 4, the pulling force of the extension ring 20 is relatively It is possible to disassemble the extension ring 200 from the side net 10. In recent years, a portable fan which is foldably hinged to a handle and a safety net so as to be seated on a table or a desk has been popularized However, since the handle and the hinge connection portion of the safety net are relatively weak, when the extension ring is pulled out, if the force is excessively applied to the handle, the durability of the hinge coupling portion may be deteriorated or broken.

The present invention allows the elongated ring 20 to be moved in a spiral shape through the helical guide groove 22 and the guide 12 engaged therewith as described above, And it is possible to prevent a problem that the durability is deteriorated or broken by preventing a large force from being applied to other portions at the time of drawing.

In the present invention, since the side net 10 and the extension ring 20 are engaged with the guide 12 and the helical guide groove 22, it is possible to prevent the extension ring 20 from being arbitrarily drawn by an external force when using the extension ring 20 have.

For example, in the case of a portable fan having a configuration in which the extension ring 20 is drawn out from the side net 10 in a sliding manner, the front net 4 is directed to the ground with the extension ring 20 pulled out When the rear netting 5 is tilted, the extension ring 20 is forcibly pulled in, so that it is troublesome to pull out the extension ring again when using the fan.

The present invention is configured such that the extension ring 20 is supported through the spiral guide groove 22 and the guide 12 engaged therewith so that even if an external force is applied as described above, The position can be maintained as it is.

Next, a portable fan according to another embodiment of the present invention will be briefly described with reference to FIGS. 7 to 8. FIG.

According to another aspect of the present invention, there is provided a portable electric fan comprising: a blade that is inserted into a rotation shaft of a motor and is rotated; a safety net that is composed of a front net, a rear net, and a side net and protects the wing; The side net 30 is blocked at the front or the front of the vane so that the wind can not be scattered and can be concentratedly injected when blowing air. And an extension ring 40 for extending the area where the wind is drawn and concentrated when blowing out to increase the straightness and improve the wind speed.

Here, the extension ring 40 is provided so as to be drawn out from the side net 30 so as to enhance the straightness at the time of discharge by expanding the area where the wind is collected and concentrated at the time of blowing.

8 (a) is an exemplary view showing a state before the extension ring 40 is pulled out, and b) is an example showing a state in which the extension ring 40 is pulled out from the side net 30.

The portable fan according to another embodiment of the present invention can prevent the wind from being scattered when the windshield is blown due to the front side or the whole of the side net 30 being clogged as shown in Figure 8a, So that it is possible to increase the blowing efficiency through the concentrated injection. When the extension ring 40 is pulled out from the side net 30 as shown in FIG. 8B, the wind gathering area expands, so that the straightness of the wind at the time of discharge is remarkably increased and the wind speed can be maximized.

The portable fan according to the present invention can improve the blowing efficiency remarkably through the side net 10 with the front part or the whole of the blade being clogged and the extension ring 20 drawn out from the side net 10, There are advantages.

1: Portable fan
2: wing
3: Safety net
4: Front network
5: Rear network
6: Handle
10:
11: Stopper
12: Guide
20: Extension ring
21: Stopper guide groove
22: Guide groove
30: side net
31: Front network
40: Extension ring

Claims (4)

A safety net (3) composed of a front net (4), a rear net (5) and a side net (10) and protecting the wing, a blade (2) In the portable electric fan including the handle 6,
The side net (10) is configured such that the wind generated by the rotation of the vane is clogged in the front part or the whole part so that the wind can be concentratedly injected forward without being scattered to the side,
And an extension ring (20) formed in a band shape having a predetermined width to surround the side net so as to enhance the directivity by expanding the area where the wind is gathered and concentrated,
In order to allow the extension ring to be pulled out from the side netting in a forwardly withdrawable state, the outer circumferential surface of the side net (10) and the inner circumferential surface of the extension ring (20)
A stopper 11 in the form of a projection is formed on one surface,
And a stopper guide groove (21) for guiding the stopper is formed on the other surface,
Wherein the extension ring is pulled or pulled backward in front of the safety net so that the stopper moves along the stopper guide groove and pulls or pulls the extension ring.
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