KR20150006277A

KR20150006277A - Picking commodity type game machine

Info

Publication number: KR20150006277A
Application number: KR1020130079882A
Authority: KR
Inventors: 조옥; 정명화
Original assignee: 주식회사 한신메카
Priority date: 2013-07-08
Filing date: 2013-07-08
Publication date: 2015-01-16

Abstract

The article drawing game machine of the present invention comprises: a casing having a storage space therein and having a transparent window, an article discharge port and a money input port on the front side; An article display unit disposed vertically and horizontally inside the casing, the article display unit being connected to the wire so as to face the transparent window; A scissors portion provided in the casing so as to be movable in the X-axis, Y-axis, and Z-axis directions in front of the article display part and driven to be cut and driven by a user's operation; A scissors operating unit provided in front of the casing and adapted to receive an operating signal of the scissors portion from a user; And a controller for controlling the scissors so that the scissors are moved to an operation signal input through the scissors manipulation unit depending on whether the money is input through the money input slot.

Description

PICKING COMMODITY TYPE GAME MACHINE

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a game machine for extracting articles, and more particularly to a game machine for extracting articles which can cause interest of a user in a new way of cutting articles using scissors.

Item Drawing The game machine is a collection of various items such as dolls, candy, lighter, toys, and is popular in various classes from children to adults. In the conventional article drawing game machine, a doll or a toy is irregularly housed inside the case as disclosed in the registration room No. 20-0390954, " article picking and recreation ", and the pickup device with the tongs is drawn out to the outside.

However, in the conventional article drawing game machine as disclosed, the article is stored irregularly inside the case. That is, since the various articles are mutually intertwined, it is not easy for the pick-up means made of the pincers to pick up and pick up the article desired by the user. Thereby, there is a problem in that the success rate of withdrawal of articles is formed differently depending on how an administrator stores the goods, so that the user can not give credibility to the user. In some cases, the user visits a game machine installed in a place known to have a high success rate.

In addition, the gripping force of the pick-up means is weakly adjusted, and even if the article is gripped, the article can not bear the weight of the article in the home where the article is picked up. As a result, the reliability of the user's game machine is further reduced, and eventually the interest in the game machine is lowered.

In addition, most of the conventional game machines for extracting articles are formed in the shape of an enclosure, and the user has to play the game while observing the inside of the case by tilting his back.

Further, since it is necessary to roll back the waist, there is a problem that it is not easy to grasp whether the pick-up means and the article correspond to each other in the correct position.

SUMMARY OF THE INVENTION An object of the present invention is to provide an article drawing game machine which solves the above problems by introducing a new method of fixing an article to a shelf by a wire and cutting the wire by using scissors, will be.

Another object of the present invention is to provide an article drawing game machine in which a successful article take-out success rate can be obtained because the article can be taken out to the user after the user correctly recognizes the position of the desired article and then operates the scissors-

Another object of the present invention is to provide an article drawing game machine capable of providing an event card to a user regardless of whether or not the game is successful in taking out the article to the exhibition, thereby providing interest in the game and providing satisfaction with the game.

Another object of the present invention is to provide an article drawing game machine capable of accurately watching the position of the article and the relative position of the scissors with less burden on the physical strength because the user can look ahead and play the game while standing up.

The above objects and various advantages of the present invention will become more apparent from the preferred embodiments of the present invention by those skilled in the art.

The object of the present invention can be achieved by an article drawing game machine. The article drawing game machine of the present invention comprises: a casing having a storage space therein and having a transparent window, an article discharge port and a money input port on the front side; An article display unit disposed vertically and horizontally inside the casing, the article display unit being connected to the wire so as to face the transparent window; A scissors portion provided in the casing so as to be movable in the X-axis, Y-axis, and Z-axis directions in front of the article display part and driven to be cut and driven by a user's operation; A scissors operating unit provided in front of the casing and adapted to receive an operating signal of the scissors portion from a user; And a controller for controlling the scissors so that the scissors are moved to an operation signal input through the scissors manipulation unit depending on whether the money is input through the money input slot.

According to one embodiment, the casing comprises: a casing main body having the accommodating space formed therein; And a door that is openably and closably coupled to the casing body and includes the transparent window, the article discharge port, and the money input port, and an event card outlet for discharging the event card to the outside according to input of money is provided on the front surface of the door And an event card discharge unit for discharging the predetermined number of event cards to the outside depending on whether or not the money is inserted is provided inside the door corresponding to the event card outlet.

According to one embodiment, the scissors include: a scissors that are cut and driven according to whether a power source is applied; A scissors support for applying power to the scissors and moving the scissors in a Z-axis direction under the control of the controller; And a scissor conveying unit for moving the scissors support unit along the X axis and the Y axis in accordance with an operation signal applied through the scissors operation unit.

According to an embodiment of the present invention, the scissors support portion includes a Z-axis conveying groove for guiding the scissors in the Z-axis direction on an upper surface thereof, the scissor conveying portion includes a conveying body provided at a lower portion of the scissors support portion; An X-axis feed rail formed at a predetermined length in the X-axis direction in front of the article display part and guiding the feed body in the X-axis direction; And a Y-axis conveying rail vertically coupled to one side of the conveying body and guiding the scissors support in the Y-axis direction.

According to an embodiment of the present invention, the scissors manipulation unit includes: a position adjustment stick which is vertically and horizontally moved; Wherein the scissors transfer unit moves the scissors support unit in the X-axis direction and the Y-axis direction according to the adjustment direction of the position adjustment stick, and when the selection button is selected, the scissors And moves to the end of the Z-axis coupling guide to perform a cutting operation.

According to one embodiment, the event card discharger includes a discharge box in which a plurality of event cards are accommodated; A discharge roller and a driven roller disposed in the front of the discharge box to be in contact with each other and to discharge the event card to the event card outlet, and a discharge roller driving unit for driving the discharge roller under the control of the control unit.

According to an embodiment of the present invention, a plurality of coupling protrusions protruding forward are formed in a rim region of the casing main body, a coupling bar having a projection receiving groove in which the coupling protrusion is received is formed in the door so as to be movable up and down, And a door opening / closing ring for moving the coupling bar up and down to interlock the coupling protrusion and the projection receiving groove.

The present invention relates to a game system for extracting articles, which uses a scissors cutting-off method.

Further, since the articles are aligned with the article display part, the position of the desired article can be easily found, and if the user operates the position of the scissors accurately, the article can be taken out, and the withdrawal success rate is increased. Thus, the user's game satisfaction and game reliability can be enhanced.

In addition, since the event card is provided irrespective of whether the goods are taken out or not, the user's satisfaction with the game can be further increased.

Further, since the article drawing game machine of the present invention is provided so as to be used in a standing state of the user, the physical load can be reduced even if the article drawing machine is used for a long time.

1 is a perspective view showing the overall configuration of an article drawing game machine according to the present invention,
2 and 3 are illustrations showing the opening and closing operations of the casing body and the door of the game machine for extracting articles according to the present invention,
Fig. 4 is a perspective view showing the configuration of the event card discharging portion of the article drawing game machine according to the present invention,
Fig. 5 is a perspective view showing a structure of a scissors portion of an article drawing game machine according to the present invention,
FIGS. 6 and 7 are illustrations showing an operation process of the article drawing game machine according to the present invention.

For a better understanding of the present invention, a preferred embodiment of the present invention will be described with reference to the accompanying drawings. The embodiments of the present invention may be modified into various forms, and the scope of the present invention should not be construed as being limited to the embodiments described in detail below. The present embodiments are provided to enable those skilled in the art to more fully understand the present invention. Therefore, the shapes and the like of the elements in the drawings can be exaggeratedly expressed to emphasize a clearer description. It should be noted that in the drawings, the same members are denoted by the same reference numerals. Detailed descriptions of well-known functions and constructions which may be unnecessarily obscured by the gist of the present invention are omitted.

Fig. 1 is a perspective view showing a configuration of a game apparatus 1 for drawing an article according to the present invention.

As shown in the drawing, a game machine 1 according to the present invention includes a casing 100 in which a storage space for storing an article is formed, an article display unit 200 A scissors unit 300 provided in front of the article display unit 200 so as to be movable in the X axis direction, the Y axis direction and the Z axis direction to cut the article connecting wire B, And a control unit 400 for controlling the driving of the motor.

In the article drawing game machine 1 according to the present invention, the various articles A are joined to the article display part 200 by the wire B. The wire B may be provided with a rubber string, a thread or the like which is easily cut by scissors. The user can cut the wire B hanging the article A with the scissors 310 to discharge the desired article A to the outside of the casing 100. [

The casing (100) is formed with a storage space in which articles are stored. The casing 100 includes a casing body 110 in which the article display unit 200 and the scissors 300 are accommodated, a door 120 that is openably and closably provided in the casing body 110 and opens the storage space to the outside, A scissors operating unit 130 provided outside the door 120 to receive a manipulation of the position of the scissors 310 from the user and an event card discharging unit 130 coupled to the inside of the door 120 for discharging the event card C, (140).

The casing body 110 is formed in an enclosure shape and a storage space is formed in the upper area. As a result, since the storage space is arranged on the front side in a state where the user is standing up, the game can be stably enjoyed without any physical burden.

2 and 3 are perspective views illustrating a coupling structure of the casing body 110 and the door 120. As shown in FIG.

As shown in the figure, a plurality of coupling protrusions 111 protrude from the outer circumference of the casing main body 110. The locking protrusion 111 is received in the protrusion receiving groove 127a of the door 120 when the door 120 is closed so that the locking state of the door 120 is maintained.

A transparent side window 113 is disposed on the side surface of the casing main body 110 so that the user can accurately recognize the position of the internal article A. [

The door 120 is openably and closably coupled to the casing body 110. A transparent window 126 is provided on the upper surface of the door 120 so that the user can visually confirm the inside of the casing body 110. The front surface of the door 120 is provided with a coin input port 121 for inputting a coin, a bill input port 121a for inputting bills, a door opening and closing ring 123 for opening and closing the door 120, And a coupling bar 127 having an outlet 124, an event card outlet 125, and a projection receiving groove 127a.

The coin input slot 121 and the bill insertion slot 121a allow the user to enter coins and notes into the game, respectively. The coin input port 121 and the bill input port 121a apply an electrical signal to the control unit 400 when a coin or a bill is inserted.

The door opening / closing ring 123 moves the joining bar 127 disposed inside the door 120 up and down to maintain or release the locked state of the door 120. The door opening / closing ring 123 is disposed on the hook moving groove 123a, and when the manager presses the door opening / closing hook 123, the door opening / closing hook 123 moves up and down on the hook moving groove 123a. The coupling bar 127 moves up and down on the door 120 in conjunction with the upward / downward movement of the door opening / closing ring 123.

As shown in FIG. 3, the joining bar 127 is provided so as to be elastically movable up and down inside the door 120. On the surface of the coupling bar 127, a plurality of projection receiving grooves 127a are formed with a predetermined size. The inside of the coupling bar 127 is engaged with the door 120 by an elastic member (not shown). The coupling bar 127 moves in association with the upper and lower portions of the door opening / closing ring 123. One area of the coupling bar 127 is fixedly coupled to the door opening / closing ring 123. Thereby moving vertically in conjunction with the position of the door opening / closing ring 123.

The locking protrusion 111 is received in the projection receiving groove 127a when the door opening / closing ring 123 is moved upward and the door 120 is maintained in the locked state. On the other hand, when the manager presses the door opening / closing ring 123 downward, the engagement bar 127 moves downward and the projection receiving groove 127a moves downward, and the engagement projection 111 is separated from the projection receiving groove 127a So that the door 120 and the casing main body 110 are released from the locked state.

The event card outlet 125 discharges the event card C discharged from the event card discharge unit 140 to the outside. The article drawing game machine (1) according to the present invention provides the user with the event card (C) regardless of the success rate of withdrawal of the article (A) when the user inputs money for the game. The event card C may be variously provided in consideration of the age of the user in accordance with the type of the article A provided by the article drawing game machine 1. [

That is, when the article A is a doll that a child likes, the event card C may be a character image of a child, a monster photograph, a dinosaur photograph, and the like. On the other hand, if the article (A) is an adult favorite product such as a mobile phone case, a lighter, or a key ring, it can be a photograph of an entertainer, a lottery ticket,

An event card discharge unit 140 is provided on the inner side of the door 120 in correspondence with the event card discharge port 125. Fig. 4 is a perspective view showing the configuration of the event card ejecting unit 140. Fig. The event card discharge unit 140 includes a discharge box 141 for storing a plurality of event cards C and an event card C which is formed to be interlocked with an event card discharge port 125 in front of the discharge box 141, A discharging roller 143 disposed at the lower portion of the discharging path 142 and a discharge roller 143 disposed at a lower end of the discharging roller 143 in the direction opposite to the discharging roller 143. [ A driving gear 147 coupled to the rotation shaft of the discharge roller 143 and a transmission gear 145 for transmitting the driving force of the driving motor (not shown) to the driving gear 147 149).

A pickup member (not shown) is provided at one side of the discharge box 141 to supply the predetermined number of event cards stored in the discharge box 142 to the discharge passage 142 under the control of the controller 400. The pick-up member (not shown) is moved by the driving of the pickup gear 148 and imparts frictional force to the event card C, and discharges the event card C one by one to the discharge path 142.

The picked up event card C receives the transfer force between the discharge roller 143 and the driven roller 145 and is discharged to the event card outlet 125.

On the other hand, a scissors manipulation unit 130 is disposed on the front surface of the door 120. Preferably, the scissors manipulation unit 130 is disposed at a position where the hand is positioned when the user stands.

The scissors manipulation unit 130 includes a position adjustment stick 131 that is moved up and down and left and right, a selection button 133 that receives an operation completion signal of the position adjustment stick 131, a number display window 135 that displays the number of times of game entry, .

The position adjusting stick 131 is movably provided in the left and right directions (a) and the up and down directions (b) as shown in FIG. 6 by the pressure of the user. At this time, when the user operates the position adjusting stick 131 in the lateral direction (a direction), the scissors 310 are moved in the X-axis direction along the X-axis feed rail 333 and the position adjusting stick 131 is moved up and down (B direction), the scissors 310 are moved along the Y-axis feed rail 335 in the Y-axis direction.

The selection button 133 presses when the user completes the operation of the position adjustment stick 131. [ The position of the scissors 310 to the position adjusting stick 131 is no longer manipulated by the pressing of the selection button 133. [ The scissors 310 are moved in the Z-axis direction along the Z-axis feed groove 323 under the control of the controller 400 when the selection button 133 is pressed, thereby performing the cutting operation.

The article display unit 200 displays a plurality of articles so that the user can recognize the positions of the articles. The article display unit 200 includes a plurality of display frames 210 disposed between a pair of side walls and a rear wall of the casing main body 110 and a plurality of display frames 210 arranged at predetermined intervals in the lateral direction of the display frame 210, A vertical bar 230 supporting the horizontal bar 220,

The display frame 210 is stably coupled to the interior of the casing body 110 with a durable material to withstand the load of the article. At this time, the display frame 210 is disposed inside the casing body 110 at a predetermined angle. Whereby the article (A) from which the wire (B) is cut is easily dropped downward by the inclination angle of the display frame (210).

The product drawing game machine 1 according to the preferred embodiment of the present invention is configured such that the display frame 210 is formed to be inclined downward toward the rear side and the article A is dropped along the rear wall surface of the casing body 110, (Not shown) to the article discharge opening 124.

The horizontal bar 220 is disposed between the plurality of display frames 210 in the horizontal direction. A wire B is connected to the horizontal bar 220. Each article (A) is connected to a wire (B) in an upper area, and the wire (B) is fixed to a horizontal bar (220). The article A is placed on the display frame 210 in a state of being suspended from the horizontal bar 220 or placed in a floating state in the air. The vertical bar 230 supports the plurality of horizontal bars 220.

The scissors unit 300 is cut and driven by the operation of the scissors operation unit 130 and the control of the control unit 400. [ FIGS. 5 to 7 are views showing the configuration and operation of the scissors unit 300. FIG. The scissors 300 include a scissors 310 that are cut and driven, a scissors support 320 that supports the scissors 310 and moves the scissors 310 in the Z axis, and a scissors support 320 that transports the scissors 320 in the X axis direction and the Y axis direction And a scissors feeder 330.

The scissors 310 are open or open by an electrical signal. The scissors 310 are kept open as shown in FIG. 5 at the beginning, and after the pressing of the selection button 133, the scissors 310 move forward as shown in FIG. At this time, when the scissors 310 are disposed at positions corresponding to the wire B, the wire B is cut by the cutting operation of the scissors 310.

The scissors 310 are driven by the scissors driving unit 311. The scissors driving unit 311 causes the scissors 310 to be opened or closed by the control signal of the control unit 400. The scissors driver 311 may be implemented by a solenoid valve or the like.

The scissors support part 320 supports the scissors 310 so that the scissors 310 are moved in the Z axis direction or in the Y axis direction. The scissors support part 320 includes a support main body 321 on which a scissors driving part 311 is disposed, a Z axis feed groove 323 formed on the support main body 321, Y-axis coupling guide 325.

The support body 321 may be formed as an armature and move in the X axis direction together with the scissors transfer unit 330 or may be moved in the Y axis direction separately from the scissors transfer unit 330 or may be connected to the scissors drive unit 311 and the scissors 310, To move in the Z-axis direction.

A Z-axis feed groove 323 is formed on the upper portion of the support main body 321 so that the scissors 310 and the scissors drive unit 311 are transported in the Z-axis direction by a control signal of the controller 400.

The Y-axis coupling guide 325 is engaged on the Y-axis conveying rail 335. Thus, the support main body 321 is stably moved up and down along the Y-axis conveying rail 335. The Y-axis coupling guide 325 and the Y-axis transferring rail 335 can be realized by an LM guide method. The position control of the Y-axis coupling guide 325 along the Y-axis transferring rail 335 is performed by operating the position adjusting stick 131 of the user.

The scissors feeder 330 supports the scissors support part 320 so that the scissors 300 can be stably moved in the X axis, the Y axis, and the Z axis. The scissors conveyor 330 includes a conveyance body 331 in which the scissors support portion 320 is seated in the initial state, an X axis conveyance rail 333 that guides the conveyance body 331 in the X axis direction, a conveyance body 331, And a Y-axis feed rail 335 disposed vertically on one side of the Y-

The conveying body 331 is moved along the X-axis conveying rail 333 by the operation of the position adjusting stick 131. At this time, the scissors support portion 320 is placed on the upper surface of the conveying body 331 while being coupled to the Y-axis conveying rail 335. When the user operates the position adjusting stick 131 in the vertical direction, only the scissors support portion 320 moves in the vertical direction along the Y-axis feed rail 335 in a state of being stopped on the Y-axis feed rail 335.

The movement mechanism of the conveying main body 331 and the X-axis conveying rail 333 may be implemented by an LM guide system or by other moving systems.

The control unit 400 controls the driving of each of the components according to the user's input of money.

The operation of the game machine 1 according to the present invention having such a configuration will be described with reference to Figs. 1 to 7. Fig.

When the user wishes to play a game, money is put into the coin input slot 121 or the bill insertion slot 121a. The number of games available corresponding to the inserted money is displayed in numerals in the number-of-times display window 135. [ For example, if the game rate is 500 won per game, and the user inputs 1,000 won, the number of times is displayed on the display window.

The control unit 400 drives the drive motor (not shown) of the event card discharge unit 140 to discharge the event card C to the event card discharge port 125.

Then, the user is guided to operate the position adjustment stick 131 through a guidance message or a voice message. The user adjusts the position of the scissors 310 by viewing the position of the desired article A and moving the position adjusting stick 131 left and right and up and down.

When the user moves the position adjusting stick 131 to the left and right, the scissor conveying unit 330 moves in the X-axis direction along the X-axis conveying rail 333 in the initial state shown in FIG. When the user moves the position adjusting stick 131 up and down, the scissors support portion 320 moves up and down along the Y-axis feed rail 335 as shown in FIG. If it is confirmed that the position of the scissors is aligned in correspondence with the desired article A, the user presses the selection button 133. [

The control unit 400 controls the position of the scissors unit 300 so that the position of the scissors unit 300 is not changed by the operation of the position adjustment stick 131 when the pressing signal of the selection button 133 is applied. Then, a control signal is applied to the scissors support part 320 so that the scissors driving part 311 moves along the Z-axis feed groove 323 to the end in the Z-axis direction as shown in FIG. The scissors driving unit 311 applies a driving signal to the scissors 310 when the scissors driving unit 311 is moved to the end along the Z axis feed groove 323. [

Whereby the scissors 310 are cut and driven as shown in Fig. At this time, when the scissors 310 are disposed at positions corresponding to the wire B, the wire B is cut by the cutting drive, and the article A is dropped. On the other hand, when the scissors 310 are disposed at positions displaced from the wire B, the wire B is not cut.

As described above, the game machine according to the present invention is a new game system which uses a cutting operation of scissors, and therefore can induce the interest of the user and increase the motivation of the game.

It should be noted that the embodiment of the article drawing game machine of the present invention described above is merely illustrative and that those skilled in the art will appreciate that various modifications and equivalent embodiments are possible without departing from the scope of the present invention. It will be possible. Therefore, it is to be understood that the present invention is not limited to the above-described embodiments. Accordingly, the true scope of the present invention should be determined by the technical idea of the appended claims. It is also to be understood that the invention includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention as defined by the appended claims.

1: Drawing-out game machine 100: Casing
110: casing main body 111: engaging projection
113: side window 120: door
121: coin slot 121a: bill slot
123: door opening / closing ring 123a: ring moving groove
124: goods discharge port 124a: discharge door
125: Event card outlet 126: Transparent window
127: coupling bar 127a: projection receiving groove
130: scissors operating unit 131: position adjusting stick
133: Select button 135: Number of times window
140: Event card ejection unit 141: Discharge box
142: discharge path 143: discharge roller
145: driven roller 147: drive gear
148: Pickup gear 149: Electric gear
200: article display unit 210: display frame
220: horizontal bar 230: vertical bar
300: scissors part 310: scissors
311: scissors driving part 320: scissors supporting part
321: Support body 323: Z-axis feed groove
325: Y-axis coupling guide 330: shearing
331: conveying body 333: X-axis conveying rail
335: Y-axis conveying rail 400:

Claims

A casing having a storage space formed therein and having a transparent window, an article discharge port, and a money input port;
An article display unit disposed vertically and horizontally inside the casing, the article display unit being connected to the wire so as to face the transparent window;
A scissors portion provided in the casing so as to be movable in the X-axis, Y-axis, and Z-axis directions in front of the article display part and driven to be cut and driven by a user's operation;
A scissors operating unit provided in front of the casing and adapted to receive an operating signal of the scissors portion from a user;
And a control unit for controlling the scissors so that the scissors are moved to an operation signal inputted through the scissors operating unit according to whether the money is inputted through the money input slot.

The method according to claim 1,
The casing includes:
A casing main body having the accommodating space formed therein;
And a door that is openably and closably coupled to the casing body and includes the transparent window, the article discharge port, and the money input port,
And an event card outlet for discharging the event card to the outside according to input of money is provided on the front surface of the door,
And an event card discharge unit for discharging the predetermined number of event cards to the outside according to whether or not money is inserted is provided inside the door corresponding to the event card discharge port.

3. The method of claim 2,
The scissors portion
A scissors which are cut and driven according to whether or not the power source is applied;
A scissors support for applying power to the scissors and moving the scissors in a Z-axis direction under the control of the controller;
And a scissor conveying unit for moving the scissors support unit in X and Y axes according to an operation signal applied through the scissors operation unit.

The method of claim 3,
The scissors support portion is provided on the upper surface with a Z-axis feed groove for guiding the scissors in the Z-
The scissors-
A conveying body provided at a lower portion of the scissors supporting portion;
An X-axis feed rail formed at a predetermined length in the X-axis direction in front of the article display part and guiding the feed body in the X-axis direction;
And a Y-axis conveying rail vertically coupled to one side of the conveying main body and guiding the scissors supporting portion in the Y-axis direction.

5. The method of claim 4,
The scissors-
A position adjusting stick which is moved up and down and left and right;
And a selection button for selecting completion of the operation position,
The scissors transfer part moves the scissors support part in the X axis direction and the Y axis direction according to the adjustment direction of the position adjustment stick,
And the cutting operation is performed after the scissors are moved to the end of the Z-axis coupling guide when the selection button is selected.

6. The method of claim 5,
The event-
A discharge box in which a plurality of event cards are accommodated;
A discharge roller and a driven roller disposed above and in contact with each other above the discharge box to discharge the event card to the event card outlet;
And a discharge roller driving unit for driving the discharge roller under the control of the control unit.

3. The method of claim 2,
A plurality of engaging protrusions projecting forward are formed in a rim region of the casing main body,
A coupling bar having a projection receiving groove in which the coupling projection is received is formed in the door so as to be movable up and down,
And a door opening / closing ring is provided on the front surface of the door to move the coupling bar up and down to interlock the coupling protrusion and the projection receiving groove.