US20040250806A1

US20040250806A1 - Dart device having multipurpose function

Info

Publication number: US20040250806A1
Application number: US10/865,321
Authority: US
Inventors: Yong Kim
Original assignee: Individual
Current assignee: Individual
Priority date: 2003-06-12
Filing date: 2004-06-10
Publication date: 2004-12-16
Also published as: KR200326612Y1

Abstract

Disclosed is a dart device having multi-purpose function, wherein a front rotated dart plate is rotatively connected to a dart support plate and additionally has a rear housing member functioning as a pencil case or a savings box. For this, a dart device having multi-purpose function comprises a dart support plate guiding the rotation of the front rotated dart plate in case that the dart is installed to a wall of a desk and used, the front rotated dart plate rotatively connected to the front of the dart support plate and having various designs for dart game, and a support member inserted in a plurality of support holding units formed on a rear surface of the dart support plate for supporting the dart support plate so that the dart device is installed to a desk. And said dart support plate comprises a center support unit for supporting the front rotated dart plate so that it can be rotated, a plurality of locking holes formed at inner portion of the circumference of the center support unit, and an advertisement printed unit formed at a lower end of the dart support plate to cause an advertising effect.

Description

This application claims priority of pending Korean Patent Application No. 2003-18485 filed Jun. 12, 2003.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates, in general, to a dart device having multi-purpose function, in particular, to a dart device having multi-purpose function, its front rotated dart plate is rotatively connected to a dart support plate, and additionally has a rear housing member functioning as a pencil case for keeping writing utensils or a savings box.

2. Description of the Related Art

In conventional magnetic dart device, a magnetic front rotated dart plate is attached to a wall and users play a dart game by throwing magnetic darts into the magnetic front rotated dart plate. But these dart game is a conventional dart game method and the magnetic front rotated dart plate simply is attached to the wall, therefore there is a problem that it can not arouse young users' interest, who are pursuing new things.

For solving this problem, the dart device having a front rotated dart plate rotatively formed in front of the dart device additionally is introduced and filed (application date: Dec. 5, 2002, Korean patent application no. 20-2002-36409) by the same applicant with the present invention so that the users can play the dart game animatedly than the conventional dart game

However, the above dart device is improved in that users can play the dart game more pleasantly than the conventional simple dart game, but it has a problem that in case that the users want to use it as different usage except the dart game, it can not be used as such different usage.

In addition, in case that the users want to change the size or structure of the dart device, the manufacturing cost increases because the metallic pattern according to the size or the structure should be made respectively.

SUMMARY OF THE INVENTION

Therefore, it is an object of the present invention to provide a dart device having multi-purpose function, in which the front rotated dart plate is supported by the dart support plate and a pencil case or a savings box designed variously according to the user's taste is added on a rear surface of the dart support plate.

And it is another object of the present invention to provide a dart device having multi-purpose function, which has the dart support plate commonly used according to the size or the usage of the front rotated dart plate, and thus the dart device meets the user's desire and the manufacturing cost can be reduced.

Based on the present invention, the above object can be accomplished by a provision of a dart device having multi-purpose function, which comprises a dart support plate guiding the rotation of the front rotated dart plate in case that the dart is installed to a wall of a desk and used, the front rotated dart plate rotatively connected to the front of the dart support plate and having various designs for dart game, and a support member inserted in a plurality of support holding units formed on a rear surface of the dart support plate for supporting the dart support plate so that the dart device is installed to a desk.

Also, a dart device having multi-purpose function comprises a rear housing member having a keeping function for articles, an advertisement member having advertising function and supporting the rear housing member, a support member connected at a side of the advertisement member for supporting it, a metal plate member attached on the front surface of the rear housing member and made of metal so that a magnet of a magnetic dart is detachably attached, and a printed front rotated dart plate attached on the front surface of the metal plate member and on which various game contents are printed for dart game.

BRIEF DESCRIPTION OF DRAWINGS

The above and other objects, features and other advantages of the present invention will be more clearly understood from the following detailed description when taken in conjunction with the accompanying drawings, in which: [0013]
FIG. 1 is a perspective view of a dart device having multi-purpose function in accordance with an embodiment of the present invention; [0014]
FIG. 2 is a disassembled perspective view of a dart device having multi-purpose function according to the present invention; [0015]
FIG. 3 is a rear perspective view of a front rotated dart plate according to the present invention; [0016]
FIG. 4 is a cross-sectional view taken along the line A-A of FIG. 1; [0017]
FIG. 5 is the second embodiment in accordance with the dart support plate according to the present invention; [0018]
FIG. 6 is a perspective view of a dart device having multi-purpose function in accordance with the second embodiment of the present invention; [0019]
FIG. 7 is a disassembled perspective view in accordance with FIG. 6; [0020]
FIG. 8 is a cross-sectional view taken along the line B-B of FIG. 6; [0021]
FIG. 9 is a perspective view of the dart support plate in accordance with the second embodiment of the present invention; [0022]
FIG. 10 is a cross-sectional view of a state wherein the dart support plate of FIG. 9 is coupled to the front rotated dart plate; [0023]
FIG. 11 is a cross-sectional view of a dart device having multi-purpose function in accordance with the third embodiment of the present invention; [0024]
FIG. 12 is a perspective view of a dart device having multi-purpose function in accordance with the third embodiment of the present invention; [0025]
FIG. 13 is a disassembled perspective view of FIG. 12; [0026]
FIG. 14 is a rear view of FIG. 12; [0027]
FIG. 15 is a cross-sectional view taken along the line C-C of FIG. 13; [0028]
FIG. 16 is a perspective view of a dart device having multi-purpose function in accordance with the forth embodiment of the present invention; [0029]
FIG. 17 is a disassembled perspective view of FIG. 16; [0030]
FIG. 18 is a cross-sectional view taken along the line D-D of FIG. 16; [0031]
FIGS. 19[0032] a and 19 b are a cross-sectional views illustrating the process that the support member is detachably attached to the rear housing member according to the present invention;
FIG. 20 is a cross-sectional view illustrating that present invention is used as a white board; [0033]
FIG. 21 is a perspective view illustrating the second embodiment of support member according to the present invention; [0034]
FIG. 22 is an outer perspective view illustrating a state wherein the first embodiment of the present invention is used as both a front rotated dart plate and a pencil case.[0035]

DETAILED DESCRIPTION OF PREFERRED EMBODIMENT

The specific constitution in regard to the present invention is described as follows via the accompanying drawings. [0036]
FIG. 1 is a perspective view of a dart device having multi-purpose function according to the present invention. Said dart device having multi-purpose function comprises a [0037] dart support plate 110 supporting the dart device in case that the dart device is installed to a wall or a desk, a front rotated dart plate 150 rotatively connected in front of the dart support plate 110 and on which various designs for dart game is positioned, and a support member 190 which is inserted in a plurality of support holding units 117 formed at a rear of the dart support plate 110 so that the dart device can be installed to a desk.
As shown in FIGS. 2 and 3, the [0038] dart support plate 110 has a center support unit 120 supporting the front rotated dart plate 150 so that it is rotated, a bearing shaft unit 126 projectedly formed in center of the dart support plate 110 and supporting the bearing 168, a stepped part 127 projected on an outer surface of the bearing shaft unit 126 for supporting an inner projected unit 1683 of the bearing 168, a locking hole 129 plurally defined at an outer portion of the center support unit 120, a plurality of support holding units 117 projectedly at a lower end of the center support unit 120 so that the support members 190 are mounted to the support holding units 117, a lower guide unit 114 roundly formed so that the front rotated dart plate 150 is rotated, an advertisement printed unit 112 formed at a lower end of the dart support plate 110, causing the advertising effect, a support leg unit 115 horizontally bent at a lower end of the advertisement printed unit 112 for facing a floor.
As shown in FIGS. 2 and 3, in case that the dart device is simply used as rotation dart device without the function of the a savings box or a pencil case, or the dart device further has the function of a pencil case, an upper connected [0039] unit 128 is formed in the center support unit 120 by cutting open a portion of the center support unit 120. In this case, the material cost can be reduced by removing the unnecessary part and the upper connected unit 128 can be made in various shapes according to a state of use, for example, in case that a rear housing member 180 is used as a savings box as shown in FIG. 8, it should not be cut open in a portion so that the coin is not discharged from the rear housing member 180.
In addition, two pairs of [0040] bearing shaft unit 126 and the stepped part 127 are formed in the dart support plate 110 respectively so that two front rotated dart plates 150 in different size can be connected to the dart support plate 110 and used according to the user's choice. For example, when two pairs of bearing shaft unit 126 and the stepped part 127 are formed in an upper and lower portion of the dart support plate 110, while a pair of bearing shaft unit 126 and the stepped part 127 formed in lower part of the dart support plate 110 is used in case that a small front rotated dart plate 150 is used, a pair of bearing shaft unit 126 and the stepped part 127 formed in upper portion of the dart support plate 110 is used in case that a big front rotated dart plate 150 is used. Therefore the front rotated dart plates 150 in different size can be used according to the user's choice.
Accordingly, in this case, as shown in FIG. 4, because the [0041] first guide ring 160 and a rotation support unit 166 formed on a rear surface of the front rotated dart plate 150 are off in a predetermined distance by concave part between them, even though two pairs of the bearing shaft unit 126 and the stepped part 127 are formed in an upper and lower portion of the dart support plate 100 within such a range of the distance, the front rotated dart plates 150 in different size can be used alternately. Therefore the manufacturer can provide users with various models of the dart device to meet the user's wish at a low cost.
And as shown in FIG. 5, the [0042] rotation support unit 166 has a center concave unit 167 concavely formed in the center of the rotation support unit 166, and a rotation guide ring unit 169 projectedly formed on an inner surface of the center concave unit 167, guiding the support for the bearing 168.
In addition, the [0043] bearing 168 which is rotating the front rotated dart plate 150 is connected to inside of the rotation support unit 166.
And as shown in FIG. 2 through [0044] 4, the front rotated dart plate 150 has the first guide ring 160 concavely formed along the circumference of the front rotated dart plate 150, the rotation support unit 166 projectedly formed in the center of the front rotated dart plate 150 so that the front rotated dart plate 150 is supported by the bearing 168 and rotates, a shock absorbing part 151 stepped on a central circumferential surface of the front rotated dart plate 150, a circular step 153 stepped on an outer surface of the shock absorbing part 151, a annular fitting groove 154 concavely formed at an inner portion of the circumference, a metal plate member 172 attached to the circular step 153 by general bonding means and made of metal so that magnetic dart 220 is detachably attached to the metal plate member 172, and a printed target member 178 attached to an outer side of the metal plate member 172 by ordinary bonding means and on which various game contents for dart game are printed.
The bonding means as described above comprises a bond and a double-faced tape, or bonding means used widely. [0045]
In addition, in case that the [0046] magnetic dart 220 thrown by the user is fixed in the metal plate member 172 by the medium of the printed target member 178, the metal plate member 172 is shocked by the velocity and the weight of the magnetic dart 220. In order that the magnetic dart 220 doesn't leave from the metal plate member 172 by reducing the shock and user can play the dart game pleasantly by reducing noise, the difference (h) in height between the shock absorbing part 151 and the circular step 153 is formed as show in FIGS. 4 and 8.
If the [0047] circular step 153 to which the metal plate member 172 is mounted and the shock absorbing part 151 is on the same plane, the magnetic dart 220 leaves outside the metal plate member 172 because the shock power by the dart's velocity and weight isn't absorbed, i.e., there is no shock absorbing part 151 in case that magnetic dart 220 is fixed in the metal plate member 172.
Accordingly, a predetermined gap (h) is formed between the [0048] shock absorbing part 151 and the circular step 153 by the difference in height, and thus even though the metal plate member 172 is shocked when the magnetic dart 220 is fixed in the metal plate member 172, a predetermined gap by the difference in height absorbs the shock, that is, prevents the force of repulsion so that the magnetic dart 220 doesn't leave from the metal plate member 172.
And the [0049] first guide ring 160 is vacantly formed internally so that the amount of material for the front rotated dart plate 150 is reduced but the strength of the front rotated dart plate doesn't weaken.
And as shown in FIG. 2, a plurality of the guide [0050] ring support units 1641 are formed inside the first guide ring 160 and increases the bearing power of the first guide ring 160 by coupling the inner space of it.
As shown FIGS. 1 and 2, the [0051] support member 190 is formed by the connection of a plurality of joints different in diameter and has support arms 192 inserted in support holding units 117 of the dart support plate 110, second connectors 196 coupled to the support arms 192, and first connectors 194 coupled to the second connectors 196. Especially the support member 190 has the same diameter without having the different diameters according to a state of use.
Also, as the [0052] first connector 194 of the support member 190 is formed small, the support member 190 can be conveniently kept by means that the first connector 194 is easily bent.
Furthermore, in the [0053] dart support plate 110, the rear housing member 180 is added to it according to the user's request, as shown in FIG. 7, the rear housing member 180 is closed at one side of it and cut open at the other side of it and the opening part is coupled to the dart support plate 110.
Accordingly, the [0054] rear housing member 180 has a plurality of locking members 182 inserted in the plurality of locking holes 189 of the dart support plate 110 and detachably attached to the locking holes 189, a top opening 183 cut open by a predetermined length at an upper end of the rear housing member 180 so that writing utensils 210 like a pencil are inserted in the top opening 183, a cover member support part 185 plurally formed at an upper end of the rear housing member 180 so that the cover member 187 is coupled to the cover support part 185, and a locking hole 181 defined at an upper end of the rear housing member 180.
And in case that the [0055] rear housing member 180 is used as a savings box, the cover member 187 is coupled to the top opening 183, in this case, the cover member 187 has a coin slot 188 cut open so that coin can be inserted, a locking bolt part 1875 projected downward at a central side of the cover member 187, a locking bolt 1877 projected on an outer surface of the locking bolt part 1875 and locked in the locking hole 181, a locking step 1873 projected at both sides of the locking bolt part 1875, and a plurality of locking protrusions 1871 inserted and connected to locking holes 189 plurally formed in the rear housing member 180.
And in case that the user open the [0056] cover member 187 from the rear housing member 180, the locking bolt 1877 is moved inwardly by pushing it and the cover member 187 is open upwardly.
In addition, in the present invention, one of the general detachable attachment methods for the [0057] cover member 187 is described, however the present invention comprises various detachable attachment methods in addition to the detachable attachment method as described above.
Furthermore, in the second embodiment according to the present invention as shown in FIG. 10, the only difference with the first embodiment described above is that the [0058] dart support plate 110 has a annular depression 1202 concavely formed at an outer portion of the bearing shaft unit 126, said annular depression 1202 has a proper length and height for being inserted in the space between the rotation support unit 166 and the first guide ring 160 of the front rotated dart plate 150.
Also, in the third embodiment according to the present invention as shown in FIG. 11, the dart device can be used as a white board for taking notes briefly in addition to the dart game. And the only difference with the second embodiment described above is that the [0059] metal plate member 172 has a printed target unit 1722 formed at a side of the metal plate member 172 and on which the printing contents are printed, and a white plastic coat unit 1724 coated on an outer surface of the printed target unit 1722 for functioning as a white board.
Accordingly, in the third embodiment as shown in FIG. 11 as described above, the [0060] dart support plate 110 further has the rear housing member 180, in this case, as shown in FIG. 6, the front rotated dart plate 150 is rotated and the magnetic dart 220 can be attached to the front rotated dart plate 150, in addition, it can function as a white board, and it can function as a pencil case or a savings box if necessary.
And the forth embodiment according to the present invention is as illustrated in FIG. 12 and similar with the embodiments as described above, the only difference with the embodiment described above is that the front rotated [0061] dart plate 150 is not rotatively formed and a rear housing member 280 and a advertisement printed unit 272 are composed altogether.
That is to say, when the constitution of the forth embodiment which is different with the above embodiments is described, the forth embodiment has a [0062] rear housing member 280 functioning as a savings box and a pencil case, and an advertisement member 270 formed in the lower part of the rear housing member 280 for supporting the rear housing member 280 and functioning as an advertisement.
Also in case that the dart device of the forth embodiment is used as a savings box, the [0063] cover member 287 can be coupled to the upper end of the rear housing member 280 additionally.
And said [0064] advertisement member 270 is similar with that of the embodiments of FIGS. 2 and 9 and only different with that of the above embodiments is that the advertisement member 270 is formed with the rear housing member 280 altogether. Also, the advertisement member 270 has support holding units 277 connected to the support member 190, an advertisement printed unit 272 formed at the lower end of the front rotated dart plate 150 for arousing an advertising effect, and a support leg unit 275 bent in a horizontal direction at a lower end of the advertisement printed unit 272 and supported by the floor.
Said [0065] rear housing member 280 has a cover support part 285 stepped at a side of the top opening 2801 so that the cover member 287 is inserted and coupled to the cover support part 285, a locking hole 286 defined in the upper end of the rear housing member 280 so that the cover member 287 is connected to the locking hole 286, an shock absorbing part 284 evenly formed on an outer circumferential surface of the rear housing member 280, a circular step 288 stepped on the outer surface of the shock absorbing part 284, an annular fitting groove 289 concavely formed on an inner circumferential surface of rear housing member 280 so that the metal plate member 172 and printed target member 178 are inserted and connected to it, a plurality of insert slots 282 cut open along the circumference of the rear housing member 280, and a plurality of locking slots 2821 cut open at a side of the insert slots 282.
And said [0066] insert slots 282 and said locking slots 2821 are formed at three places of the circumferential surface of the rear housing member 280 and it is preferred that the insert slots 282 and the locking slots 2821 are formed in the rest part of the circumferential surface of the rear housing member 280 except part coupled to the cover member.
Also, in case that the [0067] rear housing member 280 is used as a savings box, the cover member 287 has a coin slot 2871 cut open to throw coins in it, a locking bolt part 2873 projected downward from at a side of the center of the cover member 287, a locking bolt 2875 projected at an outer surface of the locking bolt part 2873, a locking step 2879 projected at both sides of the locking bolt part 2873, and a locking protrusions 2877 plurally formed so that it is inserted and connected to the locking slots 2821 of the rear housing member 280.
FIG. 16 through [0068] 19 are the fifth embodiment, their difference with the embodiments described in FIG. 12 through FIG. 15 is that the fifth embodiment further has rotation support member 260 so that the front rotated dart plate 150 can be installed in addition that the rear housing member 280 and the advertisement member 270 are formed altogether, the fifth embodiment is the same with the forth embodiment besides above.
And said [0069] rotation support member 260 comprises a plurality of locking lug units 262 formed in the rotation support member 260 so that it is inserted and detachably attached in the plurality of the insert slots 282 of rear housing member 280, a bearing shaft unit 267 in which the bearing 168 is inserted and guiding the rotation of the bearing 168, a stepped part 266 projectedly formed at the lower end of the bearing shaft unit 267 and coupled to the bearing 168 for rotating it smoothly, and a second guide ring 264 projected in the outer part of the stepped part 266 and vacantly formed inside it.
That the locking [0070] lug units 262, the insert slots 282 and the locking slots 2821′ are detachably attached as described above is one of usually used methods, as shown in FIG. 19, the locking lug units 262 are plurally formed in more than three places of the circumference of the rotation support member 260 and face the insert slots 282 of the rear housing member 280 each other. And the projected part of the locking lug units 262 is engaged in the insert slots 282(FIG. 19a) and then the rotation support member 260 is rotated in the direction of the locking slots 2821, therefore the locking lug units 262 are engaged in the side grooves of the locking slots 2821 without leaving from the locking slots 2821 (FIG. 19b).
FIG. 20 is the sixth embodiment of the present invention, the difference between the sixth embodiment and the embodiments as described above is that the sixth embodiment can be used as a white board for taking notes briefly in addition to dart device for the dart game. Also the [0071] metal plate member 172 comprises a printed target unit 1722 on which printing contents necessary for using as dart game or white board is printed, and a white plastic coat unit 1724 formed on an outer surface of the printed target unit 1722 for functioning as white board.
Accordingly, the sixth embodiment according to FIG. 20 as described above can be applied to the embodiments according to FIGS. 12 and 16, in case that the [0072] rear housing member 280 is coupled to the sixth embodiment, the rear housing member 280 functions as a pencil case or a savings box. Therefore the sixth embodiment can be used for rotation dart game or used as a white board, or has a function of a savings box or a pencil case.
FIG. 21 is the seventh embodiment according to the present invention, its difference with the embodiments as described above is that besides the method of supporting floor by the [0073] support member 190 as described above, the method of supporting floor generally used frequently is applied. Besides this, the various methods of supporting floor can be applied to the present invention.
That is to say, in the dart device according to the seventh embodiment, a [0074] support member 256 is inserted in the arm insert holes 257 defined in both sides of the rear housing member 280 and stop lug units 252, 254 are formed in a side of the rear housing member 280 so that the support member 256 can't be rotated by a predetermined angle.
In the dart device having multi-purpose function according to the present invention having the constitution as above, the operation relationship is described as follows. [0075]
If the operation order for playing a dart game is described on the basis of FIG. 1 of the first embodiment, first, the user inserts the [0076] support member 190 in the support holding unit 117 formed at the lower end of rear surface of dart support plate 110 and put the dart device on a desk, and then only if the user rotates the front rotated dart plate 150 connected to front of the dart support plate 110, the bearing 168 which is inserted in the rotation support unit 166 projectedly formed in the rear of the middle portion of the front rotated dart plate 150 is guided by the bearing shaft unit 126 projectedly formed in front of the dart support plate 110 and rotated.
At this time, the inner projected [0077] unit 1683 of the bearing 168 is contacted with the stepped part 127 and the outer race 1685 of the bearing 168 is contacted with the rotation guide ring unit 169, finally, the bearing 168 functions as a medium so that the front rotated dart plate 150 is supported by the dart support plate 110 and rotated smoothly.
And the other embodiment according to the present invention is as illustrated in FIG. 6 through [0078] 8, the above embodiment further has the rear housing member 180 which functions as a pencil case for keeping writing utensils or a savings box in the rear surface of the dart support plate 110 and FIG. 22 illustrates the state wherein the above embodiment is used.
Accordingly, while the user plays the dart game by rotating the front rotated [0079] dart plate 150 formed in front of the dart support plate 110, the user can keep writing utensils in the rear housing member 180 detachably attached in the rear surface of the dart support plate 110, and thus the user can keep writing utensils and other articles in the office or house conveniently.
Furthermore, as shown in FIG. 22, as the [0080] support member 190 is slopingly formed against the floor, the rear housing member 180 is slopingly formed. In this reason, the plurality of the writing utensils kept inside the rear housing member 180 are lowered downward by a load and thus the writing utensils are arranged from the outside while conventional pencil case is put horizontally against the floor and the writing utensils put disorderly in the rear housing member 180.
Also if the [0081] cover member 187 is detachably mounted to the upper end of the rear housing member 180, the dart device can function as a savings box for saving small changes in the office or house.
Other embodiments according to FIG. 9 through [0082] 21 are similar with the above embodiments and thus they are not described concretely.
In particular, the embodiments as described above illustrate the preferred embodiments of the present invention and a person skilled in the art will readily recognize that the dart device may be formed in various shapes as square, oval or polygon, without departing from the scope and spirit of the present invention. [0083]
As apparent from the above description, the dart device having multi-purpose function according to the present invention provides advantages in that, the dart device functions as a savings box or a pencil case and advertisement or while the dart device functions as a rotation dart device by rotating the front rotated dart plate through the medium of the rotation support unit formed in the center of the dart support plate, the dart device functions as a pencil case or a savings box if necessary. Furthermore, as the product having various functions can be manufactured by the minimum parts, the manufacturing cost for the product can be reduced and the productivity can be improved. [0084]

Claims

What is claimed is:

1. A dart device having multi-purpose function comprising:

a dart support plate guiding the rotation of the front rotated dart plate in case that the dart is installed to a wall of a desk and used;

the front rotated dart plate rotatively connected to a front of the dart support plate and having various designs for dart game; and

a support member inserted in a plurality of support holding units formed on a rear surface of the dart support plate, supporting the dart support plate so that the dart device is installed to a desk.

2. The dart device having multi-purpose function as set forth in claim 1, wherein said dart support plate has a center support unit for supporting the front rotated dart plate so that it can be rotated, a bearing shaft unit projectedly formed in the center of the dart support plate and supporting the bearing, a stepped part formed on a circumferential outer surface of the bearing shaft unit to support a inner projected unit of the bearing, a plurality of locking holes formed at an inner portion of the circumference of the center support unit, a plurality of support holding units projected at a lower end of the center support unit so that the support members can be inserted in the support holding units, a lower guide unit roundly formed so that the front rotated dart plate can be rotated, an advertisement printed unit formed at a lower end of the dart support plate to cause an advertising effect, and a support leg unit horizontally bent at a lower end of the advertisement printed unit and supported by a floor.

3. The dart device having multi-purpose function as set forth in claim 2, wherein said center support unit has upper connected unit cut open in a portion of the center support unit and connected upwardly.

4. The dart device having multi-purpose function as set forth in claim 2, wherein said bearing shaft unit and said stepped part in the center support unit are plurally formed.

5. The dart device having multi-purpose function as set forth in claim 1, wherein said front rotated dart plate has a first guide ring concavely formed along the circumferential surface of the front rotated dart plate, a rotation support unit projectedly formed in the center of the front rotated dart plate for supporting and rotating the bearing, a shock absorbing part stepped on a central circumferential surface; a circular step stepped at an outer side of the shock absorbing part, an annular fitting groove concavely formed on an inner surface of circumference of the front rotated dart plate, a metal plate member made of metal so that a magnetic dart is detachably attached to the metal plate member, and a printed target member attached to an outer surface of the metal plate member by a general bonding means and on which various game contents for dart game are printed.

6. The dart device having multi-purpose function as set forth in claim 5, wherein said shock absorbing part has a height difference from said stepped part.

7. The dart device having multi-purpose function as set forth in claim 1, wherein said dart support plate further has a rear housing member functioning a pencil case.

8. The dart device having multi-purpose function as set forth in claim 7, wherein said rear housing member has a plurality of locking members inserted in and detachably mounted to a plurality of locking holes, a top opening cut open at an upper end of the rear housing member so that writing utensils are inserted in the rear housing member, a cover support part plurally formed at an upper end of the rear housing member so that the cover member is connected to the rear housing member, and a locking hole defined at an upper end of the rear housing member.

9. The dart device having multi-purpose function as set forth in claim 8, wherein said rear housing member has a cover member; said cover member has a coin drop incised at a side of the cover member so that the coin is thrown, a locking bolt part projectedly formed downward at a central side of the cover member, a locking bolt projected on an outer surface of the locking bolt part so that the locking bolt is locked in the locking hole, a locking step projectedly formed on both sides of the locking bolt part, and a plurality of locking protrusions at a side of the cover member so that they are inserted in the plurality of locking holes formed at an upper side of the rear housing member.

10. The dart device having multi-purpose function as set forth in claim 2, wherein said dart support plate further has an annular fitting groove concavely formed along the circumferential surface.

11. The dart device having multi-purpose function as set forth in claim 5, wherein said metal plate member further has a printed target member on which the printing contents are printed, and a white plastic coat unit coated on an outer surface of the printed target member for functioning as white board.

12. A dart device having multi-purpose function, comprising:

a rear housing member having keeping function for articles;

an advertisement member having advertising function and supporting the rear housing member;

a support member connected at a side of the advertisement member for supporting it;

a metal plate member attached on the front surface of the rear housing member and made of metal so that a magnet of a magnetic dart is detachably attached; and

a printed target member attached on the front surface of the metal plate member and on which various game contents are printed for dart game.

13. The dart device having multi-purpose function as set forth in claim 12, wherein said rear housing member further has a cover member at an upper end of it in case that the rear housing member is used as a savings box.

14. The dart device having multi-purpose function as set forth in claim 12, wherein said rear housing member has a cover support part stepped at a side of a top opening so that the cover member is inserted and mounted at an upper end of the rear housing member, a locking hole defined at an upper end of the rear housing member for connecting the cover member to the rear housing member, a shock absorbing part evenly formed on a circumferential outer surface of the rear housing member, a circular step stepped at an outer surface of the shock absorbing part, an annular fitting groove concavely formed on a circumferential inner surface of the rear housing member so that the metal plate member and the printed target member are inserted and positioned, a plurality of insert slots cut open, and a plurality of locking slots cut open at a side of the insert slots for locking.

15. The dart device having multi-purpose function as set forth in claim 12, wherein said rear housing member further has a rotation support member detachably attached to the insert slots, and a front rotated dart plate rotatively connected at a side of the rotation support member.

16. The dart device having multi-purpose function as set forth in claim 15, wherein said rotation support member has a plurality of locking lug units inserted and detachably attached to the plurality of insert slots of the rear housing member, a bearing shaft unit in which a bearing is inserted and guiding the rotation of the bearing, a stepped part projectedly formed at an lower end of the bearing shaft unit and connected to the bearing for smooth rotation of it, and a first guide ring projected on an outer surface of the stepped part and the inside of it is empty.

17. The dart device having multi-purpose function as set forth in claim 12, wherein said metal plate member has a printed target member on which printing contents for playing dart game or functioning as white board are printed, and a white plastic coat unit coated on an outer surface of the printed target member for functioning as a white board.