WING ASSEMBLY OF FLYING OBJECT FOR FLAPPING MOTION OF WINGS Field of the Invention The present invention relates to a wing assembly of a flying object with an engine installed therein, for flying by flapping motions. More specifically, the present invention relates to a wing assembly of a flying object with an engine installed therein, for flying by flapping motions, in which there are included: wing frames with an insertion hole formed in each of them; wing levers with a protruded part formed in each of them, for being coupled to the insertion holes, as medium members for coupling the wing frames to the engine; and a securing pin for coupling each of the wing frames and each of the wing levers respectively together.

Background of the Invention The human desire for flying over the sky has been continuously existed from the ancient times to the present. According to this desire, the two brothers of Wilber Writer and Obil Writer of U. S. succeeded in making a first winged and powered airplane. This airplane actually owes to the toy airplanes for its success of birth.

Thus the model airplanes including the toy airplanes suggest a new technology in the aircraft industry. The model airplanes are also used as sports or recreational means. Among the conventional toy flying objects, there is the kite but this kite is made to float in the sky by utilizing the wind, and therefore, the center of gravity has to be inevitably considered in making the kite. Further, the kite is controlled with a long string, and the manipulation of the string is not easy, with the result that its utility as a toy is limited. Besides the kite, there are the

radio-controlled airplanes and helicopters.

Therefore, a demand is arisen for a new kind of a wing assembly of the flying object which is different from the integral wings of the wind-utilizing kite.

In connection of this, the present inventor developed a flying object which is capable of flying through flapping motions of wings which are in turn powered by a compressed-air engine. This flying object was filed for a patent in Korea (Patent Application No. 2000-43618 : Jul. 28,2000) and as a PCT application (PCT/KR01/00932 : Jun. 1,2001).

The present invention provides a wing assembly for the flying object of the mentioned patent applications (2000-43618) and (PCT/KR01/00932), and as a matter of fact, these wings are capable of performing flapping motions.

Summary of the Invention Therefore, it is an object of the present invention to provide a wing assembly which can be used in the flying object driven by an engine.

It is another object of the present invention to provide a wing assembly which can be used in a powered flying object even at a low flying velocity.

It is still another object of the present invention to provide a wing assembly which performs twisting motions within an angular range of 15 w 45 ° so as to reinforce the propulsion force through an increase of the lifting force.

In achieving the above objects, the wing assembly of the flying object according to the present invention is capable of performing flapping motions by being driven by an engine.

More specifically, the wing assembly of a flying object with an engine installed therein, for flying by flapping motions according to the present invention includes: two pairs of wing frames 15 and 25 with an insertion hole 151 formed in each of them; two pairs of wing levers 11 and 21 with two pairs of protruded parts 111 and 211 formed therein, for being coupled to the insertion holes 151 respectively, as medium members for coupling the wing frames to an engine

frame 3; and two pairs of securing pins 10 for coupling the wing frames and the wing levers together respectively.

In another aspect of the present invention, the wing assembly of a flying object with an engine installed therein, for flying by flapping motions according to the present invention includes: two pairs of wing frames 15 with a protruded part 114 formed in each of them; two pairs of wing levers 11 a and 21 a with two pairs of insertion holes 111 a and 211 a formed therein, for being coupled to the protruded parts 114, as medium members for coupling the wing frames to an engine frame 3; and two pairs of securing pins 10 for coupling the wing frames and the wing levers together respectively.

The above objects and other objects of the present invention can be achieved by the present invention described below. The present invention will be described below in detail referring to the attached drawings.

Brief Description of the Drawings The above objects and other advantages of the present invention will become more apparent by describing in detail the preferred embodiments of the present invention with reference to the attached drawings in which: FIG. 1 is a schematic perspective view of the flying object of the present invention, with wing parts la, lb, 2a and 2b being provided therein; FIG. 2 is a plan view of the wing parts la, Ib, 2a and 2b coupled to the engine frame 3; FIG. 3 is a schematic perspective view of the front wing part 1 a separated from the engine frame 3; FIG. 4 is an exploded perspective view of the front wing part la ; FIG. 5 is a schematic perspective view of the rear wing part 2a separated from the engine frame 3; FIG. 6 is an exploded perspective view of the rear wing part 2a; FIG. 7 is a schematic exploded perspective view of another embodiment

of the front wing part la of FIG. 4; FIG. 8 is a schematic exploded perspective view of another embodiment of the rear wing part 2a of FIG. 6; FIG. 9 is a schematic exploded perspective view of still another embodiment of the front wing part la of FIG. 4; FIG. 10 is a schematic exploded perspective view of still another embodiment of the rear wing part 2a of FIG. 6; FIG. 11 illustrates still another embodiment of the front wing part la, in which FIG. 11A is a perspective view of the assembled front wing part; FIG. 11B is an exploded perspective view of FIG. 11A ; FIG. 11C is another perspective view of FIG. 1 lA ; and FIG. 11 D is an exploded perspective view of FIG. 11C ; FIG. 12 is a schematic exploded perspective view of still another embodiment of the front wing part 1 a ; FIG. 13 is a schematic exploded perspective view of still another embodiment of the front wing part 1 a ; FIG. 14 is a schematic exploded perspective view of still another embodiment of the front wing part 1 a ; FIG. 15 is a schematic exploded perspective view of still another embodiment of the front wing part la of FIG. 7; FIG. 16A is a plan view showing flapping motions of the wing frame, with a weight being involved therein ; and FIG. 16B is a plan view of the wing cloth; and FIG. 17 is a schematic perspective view showing flapping motions, with a plurality of weights being involved therein.

Detailed Description of the Preferred Embodiments The present invention provides a wing assembly of a flying object with an engine installed therein, for flying by flapping motions.

The wing assembly according to the present invention includes: two pairs

of wing frames 15 and 25 with an insertion hole 151 formed in each of them, and wing cloths 16 and 26 being attached on them respectively; two pairs of wing levers 11 and 21 with two pairs of protruded parts 111 and 211 formed therein, for being coupled to the insertion holes 151 respectively, as medium members for coupling the wing frames to an engine frame 3; and two pairs of securing pins 10 for coupling the wing frames and the wing levers together, whereby the wing assembly performs flapping motions within an angular range of about 70° to generate propulsion and lifting forces so as to fly.

Further, as will be described later, the wing parts can be embodied in diversified forms.

FIG. 1 is a schematic perspective view of the flying object of the present invention, with wing parts 1 a, lb, 2a and 2b being provided therein. The wing parts la, lb, 2a and 2b are desirably carried out in a flying object with a compressed-air engine, but it is not limited to this form, but can be applied to flying objects with other kinds of engines. For example, it can be applied to a flying object with an electric motor.

FIG. 2 is a plan view of the wing parts la, lb, 2a and 2b coupled to the engine frame. The wing parts la, lb, 2a and 2b perform flapping motions up and down by being coupled to an engine frame 3 so as to be driven by an engine (not illustrated).

FIG. 3 is a schematic perspective view of the front wing part 1 a separated from the engine frame 3. FIG. 4 is an exploded perspective view of the front wing part la.

As shown in these drawings, the protruded part 111 of the front wing lever 11 is slightly skew, and the reason is as follows. That is, if the two pairs of the wing parts la, lb, 2a and 2b were parallel to each other, then the pair of the front wings la and lb and the pair of the rear wing parts 2a and 2b would be collided during the flapping motions. Accordingly, the front protruded parts 111 are made skew.

Further, by making the front wing parts la and lb skew relative to the rear

wing parts 2a and 2b by a certain angular degrees, the propulsion force of the flying object is increased in the direction of the advancement. The flapping motions are done within an angular range of about 70°, but this can be easily varied by those ordinarily skilled in the art. The protruded part 111 is provided with a rectangular hole 112, and this is for ensuring that the wing part la can perform a twisting motion within an angular range of 15-45'during the flapping motions.

A wing cloth 16 is attached on the wing frame 15 of the wing part la, and the protruded part 111 is inserted into the insertion hole 15 of the wing frame.

Under this condition, the diameter of the insertion hole should be sufficiently large so that the wing lever 11 can be freely rotated within it. After the protruded part 111 is inserted into the insertion hole, a securing pin 10 is inserted into holes 152 and 153, thereby assembling the wing lever 11. The securing pin 10 has a pair of assembling cocks 101 and 102 which are inserted into the holes 152 and 153.

The rectangular hole 112 of the wing lever 11 has to be larger than the assembling cock 101. In other words, the wing part la which has been assembled with the securing pin 10 and the wing lever 11 performs twisting motions, that is, the wing cloth 16 performs twisting motions within an angular range of 15-45'owing to the air resistance, and because of the rectangular hole 112 of the protruded part 111.

If the wing cloth is to be made to perform more smooth twisting motions, bearings 12 can be fitted between the insertion hole 151 and the protruded part 111 as shown in the drawing. In the drawing, the number of the bearings is two, but it is not limited to this number. These smooth twisting motions will contribute to the increase of the propulsion force for the flying object.

FIG. 5 is a schematic perspective view of the rear wing part 2a separated from the engine frame 3. FIG. 6 is an exploded perspective view of the rear wing part 2a. As shown in these drawings, unlike the front wing part la, the protruded part 211 of the rear wing lever 21 of the rear wing part 2a is not skew but straight.

However, the angular range of the flapping motions of the rear wing parts 2a and

2b is about 70°, but this can be easily varied by those ordinarily skilled in the art.

A rectangular hole 212 is formed in the protruded part 211 of the wing lever 21 of the wing part 2a, and it is designed that the wing part performs the flapping motions up and down together with twisting motions within an angular range of 15-30'owing to the air resistance. A wing cloth 26 is attached on the rear wing frame 25 of the rear wing part 2a, and the protruded part 211 of the wing lever 21 is inserted into the insertion hole 151 of the wing frame 25.

The insertion hole 151 should be large enough for the wing lever 21 to be freely rotated within it. After the protruded part 211 is inserted into the insertion hole 151, the securing pine 10 is fitted into the holes 152 and 153, thereby assembling the wing lever 21. The assembling cocks 101 and 102 of the securing pin 10 are tightly fitted into the holes 152 and 153. However, the rectangular hole 212 of the protruded part 211 should be larger than the assembling cock 101.

In other words, the wing part 2a, in which the wing lever 21 is assembled by means of the securing pin 10, is such that the wing cloth 26 performs twisting motions within an angular range of 15 45 ° around the wing frame 25 because the rectangular hole 212 is formed in the protruded part 211 of the wing lever 21.

As shown in the drawings, in order to make the twisting motions smooth in the wing cloth 26, there are fitted bearings 12 between the insertion hole 151 and the protruded part 211.

In the drawing, the number of the bearings is two, but it is not limited to this number. These smooth twisting motions will contribute to the increase of the propulsion force for the flying object.

FIG. 7 is a schematic exploded perspective view of another embodiment of the front wing part 1 a of FIG. 4. The method of carrying out this embodiment is same as that of FIG. 4, except the following points. That is, unlike that the two holes 152 and 153 are formed in the wing frame of FIG. 4, there is formed a single hole 152a in the wing frame 15, and a securing pin 10a with a single assembling cock is used. Further, the features that the protruded part 111 of the wing lever 11 is skew and the wing parts perform the flapping motions are same as that of the

wing part la of FIG. 4.

FIG. 8 is a schematic exploded perspective view of another embodiment of the rear wing part 2a of FIG. 6. The method of carrying out this embodiment is same as that of FIG. 4, except the following points. That is, unlike that the two holes 152 and 153 are formed in the wing frame of FIG. 4, there is formed a single hole 152a in the wing frame 25, and a securing pin 10a with a single assembling cock is used. However, the features that the protruded part 111 of the wing lever 11 is skew and the wing parts perform the flapping motions are same as that of the wing part 2a of FIG. 6.

FIG. 9 is a schematic exploded perspective view of still another embodiment of the front wing part la of FIG. 4. The wing part la is constituted such that a wing cloth 16 is attached on the wing frame 15. A protruded part 114 is formed in the wing frame 15, so that the protruded part 114 can be inserted into an insertion hole 111 a of a wing lever 11 a. After inserting the protruded part, the securing pin 10 is fitted into holes 112a and 113a so as to assemble the wing lever lla.

The wing part 1 a in which the wing lever 11 a is assembled by means of the securing pin 10 is constituted such that the wing cloth 16 performs twisting motions within an angular range of 15-45'around the wing frame 15 because the rectangular hole 115 is formed in the protruded part 114 of the wing lever. In order to make the twisting motions smooth in the wing cloth 16, there are fitted bearings 12 between the insertion hole and the protruded part 114.

There are two holes 112a and 113a in the wing lever of the wing part, but a wing lever (not illustrated) with only one single hole and a securing pin with only one single assembling cock can be used.

FIG. 10 is a schematic exploded perspective view of still another embodiment of the rear wing part 2a of FIG. 6. A wing cloth 26 is attached on a wing frame 25 of the wing part 2a. A protruded part 114 is formed on the wing frame, and the protruded part 114 is inserted into an insertion hole 211 a of a wing lever 21 a. After insertion of the protruded part, the securing pin 10 is fitted into

holes 212a and 213a, thereby assembling the wing lever 21a to the wing frame.

The wing part to which the wing lever 21 a is assembled by means of the securing pin 10 is constituted such that a rectangular hole 115 is formed in the protruded part 114, so that the wing cloth 26 would perform twisting motions within an angular range of 15-30'owing to the air resistance. In order to further reinforce the propulsion force owing to the twisting motions of the wing cloth, there can be fitted the bearings 12 to the protruded part. The wing lever of the wing part has two holes 212a and 213a, but only one single hole (not illustrated) may be formed, while the securing pin 10 may have one single assembling cock.

FIG. 11 illustrates still another embodiment of the front wing part 1 a, in which FIG. 1 lA is a perspective view of the assembled front wing part; FIG. 11B is an exploded perspective view of FIG. 11A ; FIG. 11C is another perspective view of FIG. 11A ; and FIG. 11D is an exploded perspective view of FIG. 11C.

A protruded part 11 lb of a front wing lever 1 lb is integrally provided with a pair of rectangular protuberances 112b, and a front wing frame 15 is provided with a pair of insertion channels 152b and an insertion hole 151b, into which the pair of the rectangular protuberances can be fitted. As shown in FIGs. 11 C and 1 bd, the protruded part is inserted into the insertion hole 151b, and then the wing lever 1 lb is rotated by 90°, so that the pair of the rectangular protuberances 112b would be settled into a pair of settling slots 153b (only one of them is illustrated).

Then a lid (not illustrated) is closed so that the wing lever can be secured, thereby completing the assembling. The settling slots 153b are larger than the pair of the rectangular protuberances 112b, and therefore, the wing lever 1 lb can perform twisting motions within an angular range of 15 ~ 45 FIG. 12 is a schematic exploded perspective view of still another embodiment of the front wing part la. A protruded part l l lc of a front wing lever 1 lc is provided with a pair of insertion grooves 301 and a pair of securing slots 303, while the wing frame 15 is provided with corresponding protuberances 302.

Thus the wing lever is inserted into the wing frame, and then, a 90 rotation is carried out, thereby securing it. The wing lever thus secured performs twisting

motions within an angular range of 15-45'.

FIG. 13 is a schematic exploded perspective view of still another embodiment of the front wing part la. A protruded part 11 Id of a front wing lever 1 Id is provided with a pair of protuberances 401, while a wing frame 15 is provided with a semicircular-cross-sectioned channel 15 Id and a pair of slots 402.

The size of the slots 402 is larger than the protuberance 401, so that the wing lever can perform twisting motions within an angular range of 15 ~ 45 °.

FIG. 14 is a schematic exploded perspective view of still another embodiment of the front wing part 1 a. A protruded part 111 e of a front wing lever 1 le is provided with a single protuberance 501. After the front wing lever is assembled to the wing frame 15, a securing pin 10e is used to assemble them.

Within the front wing frame, there is provided a sufficient space within which the wing lever performs twisting motions within an angular range of 15-v 45 °.

FIG. 15 is a schematic exploded perspective view of still another embodiment of the front wing part la of FIG. 7. In FIG. 7, the bearings 12 are fitted around the protruded part 111, whereas in FIG. 15, the bearings are buried into annular grooves which are formed around the protruded part. This disposing of the bearings can be applied to all the embodiments of the present invention.

FIG. 16A is a plan view showing flapping motions of the wing frame 25 of the rear wing part, and FIG. 16B is a plan view of the wing cloth 26. The wing part is manufactured by attaching the wing cloth 26 onto the wing frame 25. The wing frame consists of a longitudinally formed frame 251 and a laterally formed weight 252. The weight 252 acts as a mass when the wings perform the flapping motions, while also serving as a frame when spreading the wing cloth.

The wing frame should preferably consist of an injection-molded product, while the wing cloth is made of a synthetic resin or a fabric. The surface of the wing cloth should preferably have pockmarks to the maximum degree so that the air resistance can be maximized.

FIG. 17 is a schematic perspective view of the wing frame showing the flapping motions of it, with a plurality of weights 252,252a, 252b and 252c being

involved therein. One or more of the weights can be employed depending on the kinds of the flying object, and this can be easily carried out by those ordinarily skilled in the art.

In the present invention, the twisting angle of the wing part can be properly decided within the angular range of 15-45'depending on the use or kind of the flying object. The wing frame and the wing cloth can be manufactured separately and then coupled together, or they can be integrally manufactured.

In the above, the present invention was described based on the specific preferred embodiments and the attached drawings, but it should be apparent to those ordinarily skilled in the art that various changes and modifications can be added without departing from the spirit and scope of the present invention, which will be defined in the appended claims.