KR20220152061A - portable electric fan - Google Patents

Abstract

A portable fan is disclosed. The portable fan comprises: a first housing in which a battery is built-in; a stator which is provided to receive power from the battery and fixed to one end of the first housing through a connection bracket; a second housing which is connected to the first housing and has an insertion groove into which the stator can be inserted; a rotor which is fixed to the insertion groove through forced press-fitting so that the stator can be placed on an inner side thereof, and can rotate together with the second housing when power is applied to the stator; and a plurality of blades which are provided in the second housing. Therefore, the portable fan can have the plurality of blades provided to be foldable and can stably maintain a folded state through a blade position holding unit, thereby being stored after being changed in shape to have a more compact size when stored, and can minimize damage to the blades due to collision with surrounding components when stored, thereby increasing durability.

Description

Portable electric fan {portable electric fan}

The present invention relates to a portable electric fan that a user can freely carry and use.

In general, an electric fan is a tool that generates wind by rotating blades using a motor. Conventional electric fans are generally fixed in a specific position to generate wind. Such a conventional electric fan is classified into a table top, a seat, a wall mount, or a ceiling according to a fixed position.

On the other hand, as the motor for driving the electric fan has been miniaturized, a portable electric fan that can generate wind anywhere by gripping a user's body has appeared. Such a portable fan can serve as a kind of fashion accessory as users carry it with them when going out.

However, the conventional portable fan has disadvantages in that the fan is not only inconvenient to carry, but also easily damaged because the fan is unfolded and is difficult to carry.

Of course, there are fans with a fan cover case that covers the fan blades, but in the end, since the fan blades are always maintained in an open state, there is a limit to implementing a compact size in appearance, so it may take up a certain amount of space even when stored. There are unavoidable limitations.

Republic of Korea Patent Registration No. 10-2235384 (2021. 04. 02 announcement)

The present invention has been made to solve the above-mentioned conventional problems, and a plurality of blades are made to be collapsible and to stably maintain the folded state, so that the shape can be changed to a more compact size during storage and stored It is an object of the present invention to provide a portable electric fan.

In addition, the present invention is to provide a portable electric fan capable of reducing the decrease in durability by adopting a structure that prevents the blade from rotating while finely moving in the front and rear or up and down directions and maintains a stable rotation state during blade rotation, for another purpose. do.

According to one aspect of the present invention, the first housing in which the battery is built-in; a stator provided to receive power from the battery and fixed to one end of the first housing through a connection bracket; a second housing connected to the first housing and provided with an insertion groove into which the stator is inserted; a rotor which is fixed to the insertion groove by forcible press-fitting so that the stator can be disposed therein, and which can rotate simultaneously with the second housing when power is applied to the stator; and a portable electric fan including a plurality of blades provided in the second housing.

A connecting rod protrudes from the bottom of the insertion groove of the second housing toward the first housing so as to be inserted into the central through-hole inside the stator, and the protruding end of the connecting rod passes through the central through-hole formed in the connecting bracket. After that, it can be fixed to the connection bracket through a snap ring.

The plurality of blades are hingedly rotatably connected to the second housing so as to maintain a folded state as well as being foldable toward the first housing when the second housing is not rotating, and when the second housing rotates, A hinge may be rotatably connected to the second housing so as to be unfolded outward in conjunction with rotation of the second housing.

The plurality of blades are hinge-rotatably connected to the second housing, and the second housing includes: a second lower housing into which the rotor is forcibly press-fitted and fixed; and a plurality of blades coupled to the second lower housing and maintaining a state in which the plurality of blades are folded toward the first housing and unfolded in a direction away from the first housing when the second housing is not rotating. It may include a second upper housing provided with a blade position maintaining unit.

Each of the plurality of blades includes a blade body; a rotating shaft body connected to one end of the blade body; Rotation shafts protruding from both sides of the rotation shaft body, respectively; And a protruding protrusion that protrudes apart from the rotation shaft on both sides of the rotation shaft body, and each of the plurality of blade posture holding units has a rotation shaft insertion groove so that the rotation shaft can be inserted, and is spaced apart from each other to support the rotation shaft. a pair of supporting ribs; a first protrusion insertion groove provided on the support rib so that the protruding protrusion can be inserted when the blade is hingedly rotated toward the first housing; and a second protrusion insertion groove provided on the support rib spaced apart from the rotary shaft insertion groove so that the protruding projection can be inserted when the blade is hingedly rotated in a direction opposite to the direction toward the first housing. have.

According to the portable fan of the present invention described above, since the plurality of blades are made to be foldable and to stably maintain the folded state through the blade posture holding unit, the shape can be changed to a more compact size during storage and stored. Durability can be increased by minimizing damage to the blade due to collision with surrounding components during storage.

1 is a perspective view showing a portable fan according to an embodiment of the present invention, wherein the blades are foldable upward;
2 is an exploded cross-sectional view showing a portable electric fan according to an embodiment of the present invention;
3 is a perspective view showing a blade of a portable fan according to an embodiment of the present invention;
4 is a plan view of a second upper housing of a portable electric fan according to an embodiment of the present invention;
5 is an enlarged perspective view of region V of FIG. 4;
6 and 7 are cross-sectional views showing a state in which the protruding protrusion of the blade is inserted into the first protrusion insertion groove or the second protrusion insertion groove while showing the unfolded or folded state of the blade in the portable fan according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in more detail with reference to the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but will be implemented in a variety of different forms, only these embodiments will complete the disclosure of the present invention, and will fully cover the scope of the invention to those skilled in the art. It is provided to inform you. Like reference numerals designate like elements in the drawings.

A portable electric fan according to a preferred embodiment of the present invention can be used conveniently while being carried by a user. In particular, since a plurality of blades are made to be foldable and to stably maintain the folded state, the portable fan has a more compact size when stored. can be changed and stored.

In addition, since the portable fan according to the embodiment of the present invention can prevent the blade from rotating while finely moving in the forward or backward direction or up and down direction when the blade rotates, a stable rotation state of the blade can be maintained, and consequently, durability degradation can be reduced.

Hereinafter, the present invention will be described in detail with reference to examples.

1 and 2, a portable electric fan according to an embodiment of the present invention includes a first housing 100, a stator 200, a second housing 300, a rotor 500, and a plurality of blades 700. ).

First, the first housing 100 has a rechargeable battery 110 installed therein, and an operation switch 120 capable of adjusting the rotational speed as well as turning on/off the rotational operation of the blade 700 is provided, A connector 130 for charging the battery 110 is provided. A USB-A, UBS-B, USB-C charging cable, etc. can be connected to the connector 130 .

Next, as shown in FIG. 2 , the stator 200 is provided so that power is applied from the battery 110 and is fixed to one end of the first housing 100 through the connection bracket 800 . In other words, a PCB (not shown) is provided inside the first housing 100 to control the operation of the blade 700 by being connected to the battery 110, and the stator 200 is connected to the PCB through wiring to provide power. can be supplied.

As shown in FIG. 2, the stator 200 is fixedly installed on the connecting bracket 800, and the first housing 100 and the connecting bracket 800 are mutually connected through the hook 140 and the hooking hole 811. are joined so as to be separable.

Specifically, the connection bracket 800 includes a bracket body 810 provided with a plurality of holding holes 811 and a bracket protruding from the central portion of the bracket body 810 and having a central through hole 821 provided therein. It includes a protruding rod 820. In the embodiment of the present invention, the stator 200 is fixed to the outside of the bracket protruding rod 820 with a separate bracket interposed therebetween.

Next, as shown in FIGS. 2, 6 and 7, the second housing 300 is connected to the first housing 100 through a connection bracket 800, and the connection bracket 800 and the stator 200 An insertion groove 310 is provided in the inner central region so that the stator 200 can be inserted when coupled with the stator 200 .

Next, as shown in FIG. 2, the rotor 500 is a permanent magnet and has a substantially ring shape, and is fixed to the insertion groove 310 through forced press-fitting so that the stator 200 can be disposed therein. The rotor 500 has a structure in which N and S magnetic poles are alternately repeated along its circumferential direction. Therefore, the stator 200 is fixed to the first housing 100 through the connection bracket 800, and when power is applied to the stator 200, the rotor 500 rotates simultaneously with the second housing 300. . Such simultaneous rotation of the second housing 300 and the rotor 500 is possible as the rotor 500 is forcibly press-fitted and fixed into the insertion groove 310 as described above.

In an embodiment of the present invention, a plurality of blades 700 are provided to be spaced apart from each other along the circumferential direction of the second housing 300 .

Hereinafter, the detailed structure and coupling relationship of each of the components described above will be described.

As shown in FIG. 2, the bottom of the insertion groove 310 of the second housing 300 passes through the central through hole 821 inside the stator 200, that is, through the central through hole 821 of the connecting bracket 800. The connecting rod 320 protrudes toward the first housing 100 so as to be inserted therein.

The connecting rod 320 is made of a metal material, and the protruding end of the connecting rod 320 passes through the central through hole 821 formed in the connecting bracket 800, and then attaches to the connecting bracket 800 through the snap ring 330. can be fixed That is, in the present invention, the second housing 300 and the connection bracket 800 can be coupled to each other through the connecting rod 320, and the connection bracket 800 and the first housing 100 are finally connected by a fixed coupling structure. The second housing 300 is connected to the first housing 100 and is rotatably connected.

In other words, when power is applied to the stator 200, the second housing 300 relatively rotates with respect to the first housing 100 and the connection bracket 800, and thus the blade 700 rotates.

As shown in FIGS. 1, 6 and 7, in the embodiment of the present invention, the plurality of blades 700 are rotatably hingedly connected to the second housing 300, and the ratio of the second housing 300 When rotating, the hinge is rotatably connected to the second housing 300 so as to be foldable toward the first housing 100 and to maintain the folded state.

In addition, when a user does not use the portable fan according to the present invention and stores it, the plurality of blades 700 may be folded toward the first housing 100 and stored. At this time, the blades 700 may be kept folded. A coupling structure is formed between the second housing 300 and the second housing 300 . A detailed description of the folded posture maintaining structure will be described later.

Accordingly, the user can store the portable fan in a more compact size and maximally prevent the blade 700 from being unintentionally spread and being damaged due to collision and contact with surrounding components. That is, maintaining the folded state of the blade 700 can improve the durability of the product.

In addition, the plurality of blades 700 are rotatably hingedly connected to the second housing 300. Unlike the case described above, when the second housing 300 rotates (when power is applied to the stator), the second housing It is rotatably hingedly connected to the second housing 300 so that it can be unfolded outward in conjunction with the rotation of the 300 .

In addition, as described above, when not in use, the blade 700 can maintain a folded state towards the first housing 100 unless a certain external force is applied, but power is applied to the stator 200 to move the second housing ( 300) is rotated so that when a centrifugal force is applied (when a certain amount of external force is applied), the second housing rotates simultaneously with the second housing while expanding outward.

Hereinafter, a coupling structure between the second housing 300 and the blade 700 will be described.

As shown in FIG. 2 , the second housing 300 includes a second lower housing 340 and a second upper housing 350 screwed to the second lower housing.

The second lower housing 340 is provided with the aforementioned insertion groove 310, and the rotor 500 is forcibly press-fitted and fixed into the insertion groove.

As shown in FIGS. 2 to 7 , the second upper housing 350 has a plurality of blades 700 when the second housing 300 is not rotating, that is, when the blades 700 are not rotating, 1) 1, a plurality of blade posture maintaining units 360 are provided to maintain a folded state (folded state) toward the housing 100 and 2) to maintain an unfolded state in a direction away from the first housing 100.

Here, 1) maintenance of the state in which the blade is folded toward the first housing, and 2) maintenance of the state in which the blade is unfolded toward the outside of the first housing can be selectively performed by the user.

That is, in the embodiment of the present invention, when power is not applied to the stator 200, the blade position holding unit 360 folds the first blade 700 toward the first housing 100 regardless of the user's intention. A function that can prevent further approach to or separation from the first housing side, and the second blade 700 is unfolded in a direction away from the first housing 100 to the first housing 100 regardless of the user's intention. It performs a function that can prevent movement in the direction approaching or moving away from it.

As shown in FIG. 3, the plurality of blades 700 each protrude from both sides of the blade body 710, the rotary shaft body 720 connected to one end of the blade body 710, and the rotary shaft body 720. Both sides of the rotating shaft 730 and the rotating shaft body 720 each include protruding protrusions 740 protruding apart from the rotating shaft 730 . Here, the protruding length of the protruding protrusion 740 is formed to be relatively smaller than the length of the rotating shaft 730 .

In addition, as shown in FIGS. 2, 4 and 5, each of the plurality of blade posture maintaining parts 360 includes a pair of support ribs 361, a first protrusion insertion groove 364, and a second protrusion insertion groove. groove 365.

First, as shown in FIG. 4, a cutout 351 is provided in the second upper housing 350 so that the rotary shaft body 720 of the blade 700 is accommodated inside, and the support rib 361 is provided at the cutout. 351 is provided on both sides of the cutout 351, respectively.

A rotation shaft insertion groove 362 is provided in the pair of support ribs 361 so that the rotation shaft 730 of the blade 700 can be inserted to support one side of the rotation shaft 730 .

Similarly, a lower support rib (not shown) is provided in the second lower housing 340 so as to contact the rotation shaft 730 and support the other side of the rotation shaft 730 .

The first protrusion insertion groove 364 is in a state in which the blade 700 is hingedly rotated toward the first housing 100, that is, power is not applied to the stator 200 and the user inserts the blade 700 into the first housing 100. ) direction, the protruding protrusion 740 of the blade 700 is provided on the support rib 361 so as to be inserted, as shown in FIGS. The first protrusion insertion groove 364 may be provided to communicate with the rotary shaft insertion groove 362 so as not to use a slide core in order to reduce mold manufacturing costs during injection molding of the second upper housing.

The first protrusion insertion groove 364 is made to be recessed into the pair of support ribs 361, and as described above, when the blade 700 is rotated toward the first housing, the protrusion 740 is inserted, As long as a certain amount of external force is not artificially applied, the protruding protrusion 740 may maintain a state of being inserted into the first protrusion insertion groove 364 .

In other words, as shown in FIGS. 4 and 5, the connection portion between the first protrusion insertion groove 364 and the support rib 361, that is, the relatively recessed first protrusion insertion groove 364 and the support rib 361 ) By the step provided at the connection portion, the protruding protrusion 740 can maintain the inserted state in the first protrusion insertion groove 364 unless a special external force acts and moves in a direction out of the first protrusion insertion groove. Movement may be restricted.

In other words, the blade 700 operates through the structure of the protruding protrusion 740 and the first protrusion insertion groove 364 unless a certain amount of external force acts, that is, unless power is applied to the stator 200, the first housing 100 ) can be maintained folded to the side. Therefore, the present invention can be stored in a more compact size during storage, and it is possible to prevent damage to the blade due to collision with surrounding components during storage by maintaining the folded posture of the blade.

Next, the second protrusion insertion groove 365 is in a state in which the blade 700 is hingedly rotated in the opposite direction to the direction toward the first housing 100, that is, power is applied to the stator 200 or power is not applied. When the user artificially rotates it in the state, as shown in FIGS. 2, 4 and 6, the support rib is spaced apart from the rotation shaft insertion groove 362 so that the protruding protrusion 740 of the blade 700 can be inserted. 361) is provided.

The second protrusion insertion groove 365 is made to be recessed into a pair of support ribs 361 spaced apart from the rotary shaft insertion groove 362, and as described above, the blade 700 faces the first housing. When the protruding protrusion 740 is inserted when it is rotated to unfold in the opposite direction of the direction, the protruding protrusion 740 is inserted into the second protrusion insertion groove 365 unless a certain amount of external force is artificially applied. have.

In this way, in a state in which the protruding protrusion 740 is inserted into the second protrusion insertion groove 365, as shown in FIGS. It has a substantially parallel state, and the rotation of the blade body 710 further away from the first housing 100 is restricted, so that the blade 700 is disposed parallel to the second housing as described above. It can be rotated while maintaining its state.

In other words, as shown in FIGS. 4 and 5, the connection between the second protrusion insertion groove 365 and the support rib 361, that is, the relatively recessed second protrusion insertion groove 365 and the support rib 361 ) Due to the step provided at the connecting portion, the protruding protrusion 740 can maintain a state inserted into the second protrusion insertion groove 365 and can be limited in movement in a direction out of the second protrusion insertion groove.

That is, when power is applied to the stator 200 and the blade 700 rotates through the structure of the protruding protrusion 740 and the second protrusion insertion groove 365, the protruding protrusion 740 becomes the second protrusion insertion groove 365. ) while maintaining the inserted state (the blade remains parallel to the second housing), rotation can be made. That is, by preventing the blade body 710 from rotating in a direction away from the first housing 100, the area of the blowing area of the blade 700 can be maximized.

In the above, the present invention has been shown and described in relation to preferred embodiments for illustrating the principles of the present invention, but the present invention is not limited to the configuration and operation as shown and described. Rather, it will be appreciated by those skilled in the art that many changes and modifications may be made to the present invention without departing from the spirit and scope of the appended claims.

100: first housing 140: hook
200: stator 300: second housing
310: insertion groove 320: connecting rod
340: second lower housing 350: second upper housing
360: blade posture holding unit 361: support rib
362: rotation shaft insertion groove 364: first protrusion insertion groove
365: second projection insertion groove 500: rotor
700: blade 730: axis of rotation
740: protrusion 800: connection bracket

Claims (5)

A first housing in which a battery is built-in;
a stator provided to receive power from the battery and fixed to one end of the first housing through a connection bracket;
a second housing connected to the first housing and provided with an insertion groove into which the stator is inserted;
a rotor which is fixed to the insertion groove by forcible press-fitting so that the stator can be disposed therein, and which can rotate simultaneously with the second housing when power is applied to the stator; and
A portable electric fan including a plurality of blades provided in the second housing. According to claim 1,
A connecting rod protrudes from the bottom of the insertion groove of the second housing toward the first housing so as to be inserted into the central through hole inside the stator,
The portable electric fan of claim 1 , wherein the protruding end of the connecting rod is fixable to the connecting bracket through a snap ring after penetrating the central through hole formed in the connecting bracket. According to claim 1,
The plurality of blades,
When the second housing is non-rotating, the hinge is rotatably connected to the second housing so as to be foldable toward the first housing and maintain a folded state, and when the second housing rotates, the second housing rotates A portable fan, characterized in that connected to the hinge rotatably to the second housing so that it can be unfolded outward in conjunction with. According to claim 1,
The plurality of blades are rotatably hingedly connected to the second housing,
The second housing,
a second lower housing in which the rotor is forcibly press-fitted and fixed; and
It is combined with the second lower housing, and when the second housing is not rotating, the plurality of blades maintain a folded state toward the first housing and maintain a state spread in a direction spaced apart from the first housing. A portable electric fan comprising a second upper housing provided with a posture holding unit. According to claim 4,
Each of the plurality of blades,
blade body;
a rotating shaft body connected to one end of the blade body;
Rotation shafts protruding from both sides of the rotation shaft body, respectively; and
Includes protruding protrusions protruding apart from the rotating shaft on both sides of the rotating shaft body,
Each of the plurality of blade posture maintaining units,
a pair of support ribs having a rotation shaft insertion groove to allow insertion of the rotation shaft and spaced apart from each other to support the rotation shaft;
a first protrusion insertion groove provided on the support rib so that the protruding protrusion can be inserted when the blade is hingedly rotated toward the first housing; and
When the blade is hingedly rotated in a direction opposite to the direction toward the first housing, a second protrusion insertion groove provided on the support rib to be spaced apart from the rotation shaft insertion groove so that the protrusion projection can be inserted. A portable fan made with

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