KR20020076949A - Automatic music page turner - Google Patents

Abstract

PURPOSE: An automatic music page turner is provided to allow the tuner to be easily used at the music stand by simplifying structure and reducing size of the tuner. CONSTITUTION: A tuner comprises a support(20) having a first accommodation part and a second accommodation part(22), and a restricted guide member; a plurality of rods(30a to 30f) having ends where the first accommodation part and the second accommodation part of the support are inserted, and the other ends for insertion of a music page; an ejecting unit for ejecting rods from the first accommodation part and the second accommodation part of the support; a carrier(50) arranged to be rotatable with respect to the support, and which cooperates with the restricted guide member of the support so as to move the rods ejected by the ejecting unit to the space formed between the first accommodation part and the second accommodation part; a driving unit for rotating the carrier; and a control unit for controlling operation of the driving unit.

Description

Automatic Sheet Music Equipment {AUTOMATIC MUSIC PAGE TURNER}

The present invention relates to a music score, and more particularly, to an automatic sheet music apparatus that can automatically turn sheet music one by one.

In general, when a player plays a musical instrument composed of several pages of music for a long time, the player places the sheet music on the music table and plays the sheet music by hand. As such, it is not only cumbersome and inconvenient for the performer to play the score directly, but also has a lot of difficulties in playing because the player must pause the performance in order to pass the score. Accordingly, various types of automatic sheet music stands have been developed that can automatically pass music scores.

For example, in the automatic music stand of Korean Utility Model Publication No. 188700, when the movable plate is moved to the left or right by forward and reverse rotation of the motor, the gear roller which meshes with the gear of the movable plate is rotated about the fixed shaft, and the bar is It is configured to turn the left and right music notes fixed to the clip.

However, since the movable plate is moved to the left and right of the music rest, the space for operating the movable plate is large, and therefore, the size of the entire apparatus is restricted, and the size of the movable plate is considerably increased and the weight becomes heavy.

The present invention has been made to solve the various problems and disadvantages of the prior art as described above, the object of the present invention is a simple structure, made of a small size can be easily placed on the music stand of the existing manual music stand or piano can be used In addition, to provide a practical automatic sheet music device that can be easily carried and stored.

In order to achieve the above objects, the automatic musical apparatus according to the present invention comprises: a support having a first accommodating part having an inlet and a second accommodating part, and having restraint guide means formed thereon; A plurality of rods, one end of which is fitted to be aligned with the first accommodating portion and the second accommodating portion of the support, the musical notes being fitted to the other end; Ejecting means for extracting the rods from the first and second accommodating portions of the support; A carrier installed to be rotatable relative to the support and moving the rod drawn by the ejecting means in cooperation with the restraint guide means between the first and second accommodating portions of the support; Drive means for rotating the carrier; Control means for controlling the drive of the drive means.

1 is a perspective view showing a configuration in which the automatic sheet music apparatus of the present invention is installed on a music stand,

2 is a perspective view showing the configuration of an automatic musical score apparatus according to the present invention;

Figure 3 is a cross-sectional view partially showing the configuration of the housing, the support, the rods, the ejecting mechanism and the carrier of the first embodiment of the automatic musical apparatus according to the present invention;

Figure 4 is a plan view partially showing the configuration of the housing, the support, the rods, the ejecting mechanism and the carrier of the first embodiment of the automatic musical apparatus according to the present invention,

5 is a perspective view partially showing the support and the rod of the automatic musical apparatus according to the present invention;

6 is a cross-sectional view partially showing a second embodiment of the ejecting mechanism according to the present invention;

7 is a circuit diagram for explaining a first embodiment of the control means for controlling the motor of the automatic musical score apparatus according to the present invention;

8 is a view showing the configuration of a seesaw switch for switching the forward and reverse rotation of the motor of FIG.

9 is a circuit diagram showing for explaining a second embodiment of the control means for controlling the motor of the automatic musical score apparatus according to the present invention;

10A to 10E are views for explaining the operation of the second embodiment of the control means for controlling the motor of the automatic musical instrument according to the present invention;

11 is a block diagram showing a third embodiment of the control means for controlling the motor of the automatic musical score apparatus according to the present invention;

12a to 12c are views showing to explain the operation that the rods are drawn out from the first housing of the support in the automatic musical apparatus of the present invention and moved by the carrier,

13A to 13C are diagrams for explaining an operation in which rods moved by a carrier are accommodated in the second accommodating part of the support in the automatic musical apparatus of the present invention.

♣ Explanation of symbols for the main parts of the drawing ♣

10: housing 20: support

21: first accommodating part 22: second accommodating part

23: inside jaw 24: outside jaw

30a to 30f: rod 40, 140: ejecting mechanism

41,141: Pusher 43: coil spring

142: torsion spring 50: carrier

51: flange 52: catch groove

60: motor 70: gear train

76: drive gear 80: push switch

86: seesaw switch 90: power source

100: disc cam 110: limit switch

120: electronic circuit

Hereinafter, a preferred embodiment of an automatic musical instrument according to the present invention will be described in detail with reference to the accompanying drawings.

First, referring to Figures 1 and 2, the automatic musical apparatus of the present invention has a housing 10 constituting the appearance, the slot 11 is formed on the front surface of the housing 10. The housing 10 has a narrow shape and a long shape so that it can be placed on the support plate 2 of the conventional manual music stand or a music support plate such as a piano. The musical score 1 is placed on the upper surface of the housing 10.

2 to 5, the support 20 is fixedly installed in the inner center of the housing 10 so as to be close to the slot 11. The support 20 is formed in a cylindrical shape, and a position where the first accommodating portion 21 and the second accommodating portion 22 respectively have inlets 21a and 22a on the upper side thereof correspond to each other. The inlet 21a, 22a of the payment part 21 and the 2nd accommodating part 22 is formed so that the inclination path inclined at a predetermined angle may be formed in the position which maintains the angle of 180 degree. On the upper surface of the support 20 is a semicircular inner jaw 23 and outer jaw 24 connecting the inlet 21a of the first accommodating portion 21 and the inlet 22a of the second accommodating portion 22. It is protruded at predetermined intervals to form 25).

Meanwhile, each of the inner jaw 23 and the outer jaw 24 of the support 20 restrains the movement of one of the plurality of rods 30a to 30f described later by the carrier 50 and at the same time the first accommodating portion ( 21 or has a function of restraint guide means for guiding entry into the second housing portion 22. That is, when the position of the first accommodating portion 21 is referred to as the starting position of the sheet music 1 and the position of the second accommodating portion 22 is referred to as the completed position of the sheet music 1, the first accommodating portion As the best bar 30a is moved from 21, the turning operation of the sheet music 1 starts, and when the best bar 30a reaches the second accommodating portion 22, the turning operation of the sheet music 1 is completed. Therefore, as illustrated in FIG. 4, the turning of the sheet music 1 is performed only in one section between the first accommodating portion 21 and the second accommodating portion 22, and in the other section, the inner jaw 23 and the outer jaw ( 24) movement of the best rod 30a is impeded. Alignment protrusions 21b, 21c, 22b, and 22c are formed on one side inner surface of the first accommodating portion 21 and the second accommodating portion 22 at predetermined intervals, respectively. A boss 27 having a shaft hole 26 is formed in the center of the support 20, and a hole 28 is formed in the lower side of the support 20 along the circumferential direction.

1 to 4 and 12A together, the first housing 21 and the second housing 22 of the support 20, the slot of the housing 10 so as to pass the sheet music 1 one by one One end of the plurality of elongated rods 30a to 30f extending outwardly through 11 is fitted and inclinedly aligned. At the other ends of the bars 30a to 30f, page holders 31a to 30f to which the sheet music 1 is fixedly provided are provided so as to exclude interference with each other. In the present embodiment, the page holders 31a to 30f are formed by vertically forming the other ends of the bars 30a to 30f and cutting them to the ends thereof, but this is merely an example. It may be configured by attaching integrally to 30a to 30f).

As clearly shown in Figs. 4 and 5, at one end of each of the rods 30a to 30f, the alignment grooves 32a and 32b are inserted into the alignment protrusions 21b, 21c, 22b, and 22c of the support 20 so as to be guided. The restraint groove 33 is formed on the outer surface of the rods 30a to 30f positioned between the alignment grooves 32a and 32b. As the alignment grooves 32a and 32b of each of the rods 30a to 30f are guided by being inserted into the alignment protrusions 21b, 21c, 22b and 22c of the support 20, the lifting movements of the rods 30a to 30f are accurately performed. . 4 shows that the alignment protrusions 21b, 21c, 22b, and 22c of the support 20 and the alignment grooves 32a and 32b of each of the rods 30a to 30f are formed at equal intervals, but the first accommodating portion The alignment protrusions 21b and 21c on the side of 21 and the alignment protrusions 22b and 22c on the side of the second accommodating portion 22 are formed at different intervals, and the alignment grooves 32a and 32b correspond to these intervals. May be formed on the rods 30a to 30f.

Referring to FIGS. 2, 3, 12A to 12C, and FIGS. 13A to 13C, each of the first accommodating part 21 and the second accommodating part 22 of the support 20 may include a first accommodating part 21. ) And the ejecting mechanism 40 of the first embodiment for extracting the rods 30a to 30f from the second housing portion 22 is provided. The ejecting mechanism 40 of the first embodiment is equipped with a pusher 41 mounted to each of the first accommodating portion 21 and the second accommodating portion 22 and supporting the rods 30a to 30f, Guide rods 42 fixed to the bottom of the pusher 41 to penetrate the bottom of the first and second accommodating portion 21 and the second accommodating portion 22 so as to guide the lifting motion of the pusher 41, and the pusher ( It is composed of a coil spring 43 mounted on the bottom of the 41 to lift the pusher 41. The upper surface of the pusher 41 is formed in parallel with the upper surface of the support 20. At the lower end of the guide rod 42, a stopper 42a is formed on the bottom of each of the first accommodating portion 21 and the second accommodating portion 22 to restrain the raised position of the pusher 41. When the rods 30a to 30f are fitted through the inlets 21a and 22a of each of the first accommodating portion 21 and the second accommodating portion 22, the pusher 41 overcomes the elastic force of the coil spring 43. It is lowered to allow entry of the rods 30a to 30f. In addition, in the present embodiment, since the first accommodating part 21 and the second accommodating part 22 of the support 20 form an inclined path, the rods 30a to 30f are formed of the first accommodating part 21 and the first accommodating part. 2 It enters smoothly and correctly with little force in the accommodating part 22.

6 shows a second embodiment of the ejecting mechanism. Referring to FIG. 6, the ejecting mechanism 140 of the second embodiment is similar to the pusher 41 of the ejecting mechanism 40 of the first embodiment, respectively, of the first accommodating portion 21 and the second accommodating portion 22. The pusher 141 which is mounted to move up and down and supports the rods 30a to 30f, and is mounted on one side of the first accommodating portion 21 and the second accommodating portion 22 and the bottom surface of the pusher 141 is mounted. It is provided with a torsion spring 142 for supporting and raising. The winding portion 142a of the torsion spring 142 is fixed to the fixing piece 143 protruding from the inner surface of the support 20 positioned outside the first accommodating portion 21 and the second accommodating portion 22. The one end 142b extending from the winding part 142a penetrates through the support 20 to be in contact with the bottom surface of the pusher 141, and the other end 142c penetrates through the support 20 to be connected with the first accommodating part 21. It is fixed to the bottom of the 2nd accommodating part 22. As shown in FIG. Engaging pieces 144a and 144b on the bottom of the pusher 141 and the bottom of the first and second accommodating portions 21 and 22 to fix one end 142b and the other end 142c of the torsion spring 142, respectively. Is formed.

2, 3, 12a to 12c and 13a to 13c, the automatic musical instrument of the present invention is installed so as to rotate on the upper side of the support 20 and the first of the support 20 A disk-shaped carrier 50 which carries the rods 30a to 30f drawn out from one of the accommodating portion 21 and the second accommodating portion 22 and stores them in the other. An annular flange 51 fitted to the track 25 of the support 20 on the bottom of the carrier 50 to prevent the best rod 30a from being pulled out of the first accommodating portion 21 and the second accommodating portion 22. Is extended. One catch groove 52 is formed on one side of the flange 51 to hold the rods 30a to 30f drawn out from the first accommodating portion 21 and the second accommodating portion 22. On the upper side of the groove 52, a constraining projection 53 is inserted into the constraining groove 33 of each of the bars 30a to 30f to prevent, for example, idling or shaking of the bars 30a to 30f. . In the center of the bottom surface of the carrier 50 is formed a rotating shaft 54 which is rotatably fitted in the shaft hole 26 of the support 20, the lower end of the rotating shaft 54 protrudes below the shaft hole 26 have.

2 to 4 again, the motor 60 is installed in the housing 10 as a driving means capable of forward and reverse rotation, and the driving force of the motor 60 is transmitted by the gear train 70. The gear train 70 is attached to the worm gear 71 mounted on the motor shaft 61 of the motor 60 and the first fixed shaft 72 so as to rotate in engagement with the worm gear 71 and the worm gear 71. And a first intermediate gear 73 having a gear 73a engaged with the gear 73 and a gear 73b integrally formed with the gear 73a, and a gear 73b of the first intermediate gear 73 to rotate. 2 the second intermediate gear 75 mounted on the fixed shaft 74 and the drive gear 76 fixedly mounted to the rotation shaft 54 of the carrier 50 so as to rotate in engagement with the second intermediate gear 75. It is composed. The first fixed shaft 72 and the second fixed shaft 74 are fixedly mounted to the housing 10, and the second intermediate gear 75 and the drive gear 76 are holes 28 of the support 20. Interlocked through.

The automatic musical instrument of the present invention includes control means of various embodiments for controlling the driving of the motor 60 by a player or a user. First, referring to FIGS. 1, 7 and 8, a first embodiment of the control means will be described. The control means of the first embodiment includes a push switch 80. The push switch 80 is mounted on the upper side of the case 81 so as to be biased by a spring 82 and includes a first button 83a and a second button 83b for forward or reverse rotation of the motor 60. Doing. Below each of the first and second buttons 83a and 83b, the first contact 85a moves up and down by the operation of the first and second buttons 83a and 83b, and the lower side of the first contact 85a. The second contact 85b and the third contact 85c, which are respectively positioned at and electrically contact the first contact 85a and output an on-off signal, are provided. The motor 60, the second and third contacts 85b and 85c of the push switch 80, and the power supply 90 are connected to each other by a wire 91.

In the present embodiment, the first and second buttons 83a and 83b are operated by the player's foot, and the first button 83a sets the motor 60 so as to sequentially turn the sheet music 1 to the left. In rotation, the second button 83b drives the motor 60 in reverse rotation so that the music score 1 can be sequentially turned to the right.

Looking at the configuration of a circuit for forward and reverse rotation of the motor 60 in the control means of the first embodiment, as shown in Fig. 8, each of the first button 83a and the second button 83b integrally extending the pressing piece ( 84a) and the pressing piece 84b are formed. Further, the first and second buttons 83a and 83b are configured to interlock with the seesaw switch 86, which is well known as an example of the changeover switch via the pressing pieces 84a and 84b. As the pressing pieces 84a and 84b of the first and second buttons 83a and 83b are alternately pressed, the seesaw switch 86 is supplied to the motor 60, as indicated by the solid and dashed lines in FIG. The polarity of the power supply 90 to be alternately changed. In the present embodiment, the seesaw switch 86 is taken as an example, but it is a matter of course that other changeover switches may be used to change the polarity of the power supplied to the motor 60.

9 and 10a to 10e show a second embodiment of the control means. Referring to Fig. 9, the control means of the second embodiment has a push switch 80 similarly to the control means of the first embodiment. Therefore, the configuration and operation of the push switch 80 in the control means of the second embodiment refer to the contents of the control means of the first embodiment described above, and the description thereof is omitted. The fourth contact 85d and the fifth contact 85e that are in contact with the first contact 85a and output an on-off signal are provided above the first contact 85a, respectively.

As shown in FIG. 3, the control means of the second embodiment is operated by the protrusion 101 formed on the outer surface of the disc cam 100, which is integrally rotated with the drive gear 76, and is provided with the push switch 70. The limit switch 110 which cooperates and controls the forward and reverse rotation of the motor 60 is provided. 3 shows that the disc cam 100 is integrally formed on the upper side of the drive gear 76, the disc cam 100 is integrally formed on the rotating shaft 54 of the carrier 50 or separately configured. It can also be mounted.

As shown in detail in FIGS. 3 and 10A to 10E, the limit switch 110 may be in contact with the protruding portion 101 of the disc cam 100 to operate elastically and the operation plate 111. A first contact 112a interlocked with 111, a second contact 112b electrically contacting the first contact 112a to output an on-off signal, and an electrical contact with the first contact 112a. The third contact point 112c outputs an off signal. At the tip of the operating plate 111 is mounted a roller 113 for contacting the outer surface of the disc cam 100 and the protrusion 101 in the rolling motion.

9 and 10A, the motor 60, the first to fifth contacts 85a to 85e of the push switch 80, and the first to third contacts 112a to 112c of the limit switch 110. ) And the power supply 90 are connected to the circuit by the wire 92. The motor 60 is connected to the first contact point 112a of the limit switch 110 and the power supply 90, and the power supply 90 is connected to the third and fifth contacts 85c and 85e of the push switch 80, respectively. It is connected. The second contact 85b of the push switch 80 is connected to the second contact 112b of the limit switch 110, and the fourth contact 85d of the push switch 80 is the limit switch 110. Is connected to the third contact 112c.

In the control means of the second embodiment, the first and second buttons 83a, 83b of the push switch 80 are similar to the control means of the first embodiment via the pressing pieces 84a, 84b as an example of the changeover switch. It is configured to interlock with the known seesaw switch 86. As the pressing pieces 84a and 84b of the first and second buttons 83a and 83b are alternately pressed, the seesaw switch 86 is supplied to the motor 60, as indicated by solid and dashed lines in FIG. 9. The polarity of the power supply 90 to be alternately changed. That is, when the motor 60 rotates forward by the operation of the seesaw switch 86 of FIG. 9, as shown by the solid line, the motor 60 and the power supply 90 are connected, and the motor 60 rotates in reverse. In this case, as shown by the dotted line, the motor 60 and the power supply 90 are connected to change the polarity of the power supply 90 supplied to the motor 60.

The control means of the third embodiment shown in FIG. 11 is an electronic circuit for controlling the power supply 90 and the forward and reverse rotation supplied to the motor 60 in conjunction with the first and second buttons 83a and 83b of the push switch 80. 120, the electronic circuit 120 is well known and thus a detailed description thereof will be omitted. In the meantime, the electronic circuit 120 may be configured by an IC (Integrated Circuit) for motor control.

Now, the operation of the automatic musical instrument of the present invention having such a configuration will be described. Hereinafter, the operation of the automatic sheet music apparatus according to the forward rotation of the motor for passing the sheet music in the forward direction will be described on the basis of being performed by the control means of the second embodiment.

As shown in FIG. 12A, one end of the rods 30a to 30f is fitted into the first receiving portion 21 of the support 20, respectively, and the best rod 30a is attached to the flange 51 of the carrier 50. When the sheet music is supported and completely immersed in the receiving portion 21 of the support 20, and the sheet music is fixed to the page holders 31a to 31f of each of the bars 30a to 30f, the automatic sheet music apparatus of the present invention is Initial state available.

Referring to FIG. 10A, the roller 113 of the limit switch 110 is in contact with the protrusion 101 of the disc cam 100 in the initial state of the automatic sheet music apparatus. At this time, since the first contact 112a and the second contact 112b of the limit switch 110 are on, but the second contact 85b and the third contact 85c of the push switch 80 are off, Since the power supply 90 is not supplied to the motor 60, the motor 60 is stopped.

Next, as shown in FIGS. 4, 9, and 10B, the player kicks the push switch 80 in a state where the first contact 112a and the second contact 112b of the limit switch 110 are turned on. When the first button 83a is pressed, the first contact 85a of the push switch 80 is lowered to turn on the second contact 85b and the third contact 85c of the push switch 80 so that the power supply 90 is turned on. It is supplied to this motor 60, and the motor 60 is driven. The driving force of the motor 60 is transmitted to the carrier 50 by the gear train 70, and the carrier 50 is rotated in the forward direction about the rotation shaft 54.

Referring to FIG. 10C, when the carrier 50 is continuously rotated so that the roller 113 of the limit switch 100 contacts the outer surface of the disc cam 100 through the protrusion 101 of the disc cam 100, the limit is limited. The motor 60 is stopped by turning off the first contact 112a and the second contact 112b of the switch 110. Thereafter, as shown in FIG. 10D, when the player releases the first button 83a of the push switch 80, the fourth contact 85d and the fifth contact 85e of the push switch 80 are turned on. As a result, the motor 60 is driven again, and the carrier 50 also rotates again.

3 and 12b, when the catch groove 52 is aligned with the inlet 21a of the first accommodating portion 21 of the support 20 by the rotation of the carrier 50, the best rod ( 30a is drawn out through the inlet 21a of the first accommodating portion 21 by the ejecting mechanism 40 and is fitted into the catch groove 52 of the carrier 50. At this time, the restraint groove 33 of the best rod 30a is fitted into the restraint protrusion 53 of the carrier 50, thereby preventing idling or shaking of the best rod 30a. Then, the second rod 30b is supported by the flange 51 of the carrier 50 so that withdrawal from the inlet 21a of the first accommodating portion 21 is prevented.

12C and 13A, the best rod 30a caught in the catch groove 52 of the carrier 50 is removed from the first accommodating portion 21 of the support 20 by the continuous rotation of the carrier 50. 2 is moved to the receiving portion (22). Referring to 13b and 13c, when the best rod 30a that has been moved by the rotation of the carrier 50 reaches the inlet 22a of the second accommodating portion 22, the best rod 30a is connected to the inner jaw 23. Supported by the outer jaw 24, the movement is constrained. Thereafter, the catch groove 52 of the carrier 50 that is rotated pushes the best rod 30a on which the movement is constrained by the rotational force, and the best rod 30a passes through the inlet 22a. Immersed in 22). That is, the best bar 30a moves from right to left to hand over the sheet music 1 of the first page.

10E, the protrusion 101 of the disc cam 100 is in contact with the roller 113 of the limit switch 110 so that the first contact 112a and the third contact 112c are turned off. When the power supply 90 is cut off. Accordingly, when the driving of the motor 90 is stopped and the turning operation of the sheet music 1 of the first page is completed, the player can continue playing while viewing the sheet music of the next page. In addition, as shown in FIG. 12C, the second bar 30b is positioned at the inlet 21a of the first accommodating portion 21 and is ready to turn over the sheet music of the second page. When the sheet music of the second page is turned over, a series of operations shown and described in FIGS. 10A to 10E, 12A to 12C, and 13A to 13C are sequentially performed by the cooperation of the carrier 50 and the rod 30b. Is achieved by

In this way, the driving of the motor 60 is controlled by the cooperation of the push switch 80 and the limit switch 110, and is stored in the first accommodating portion 21 of the support 20 by the rotational movement of the carrier 50. By moving all of the rods 30a to 30f to the second housing portion 22, the turning operation of the sheet music 1 can be continuously performed.

Meanwhile, in the above description, only the forward turning operation for turning the sheet music 1 from the right side to the left side has been described, but the reverse turning operation from the left side to the right side can be achieved by driving the motor 60 in the opposite direction to the turning operation of the sheet music 1. Can be. In the case where the sheet music 1 is to be reversed, it is achieved by pressing the second button 83b of the push switch 80. As the push piece 84b of the push switch 80 is pressed, the pressing piece 84b is switched by pressing the seesaw switch 86 as shown by the dashed-dotted line in FIG. As the motor 60 and the power supply 90 are connected as described above, the power supply 90 having the opposite polarity is supplied to the motor 60. Thus, the motor 60 is driven in the reverse direction so that the returning operation of the sheet music 1 is performed. Since the returning operation of the sheet music 1 is the opposite of the turning operation and the direction only, the operation process is the same as that of the turning operation, so a detailed description of the returning operation of the sheet music 1 is omitted.

In the first embodiment of the control means shown in FIG. 7 and FIG. 8, the power supply 90 is powered only by the player while the player presses the first button 83a and the second button 83b of the push switch 80. 60 is supplied to the sheet music 1, and the turning or returning operation is performed. In the third embodiment of the control means shown in FIG. 11, an electronic circuit having a simple configuration for controlling forward and reverse rotation of the motor 60 in conjunction with the first and second buttons 83a and 83b of the push switch 80. By providing 120, the control means of the automatic sheet music apparatus of the present invention can be made smaller and lighter.

The above-described embodiments are merely illustrative of one embodiment of the present invention, and the scope of the present invention is not limited to the above-described embodiments, and may be appropriately modified within the scope of the claims. For example, the shape and structure of each component specifically shown in the embodiment of the present invention can be modified.

According to the automatic sheet music device according to the present invention as described above, the structure for operating the rod to pass the sheet by piece by the rotational movement of the carrier is very simple and small size can be easily placed on the existing music stand, It can be easily carried and stored. In addition, the limit switch, which is operated by the mechanical mechanism of the disc cam, cooperates with the push switch to control the driving of the motor, thereby smoothly and accurately controlling the turning of the sheet music without regard to the timing of the operation of the push switch by the player. It can be effective.

Claims (8)

A supporter having a first accommodating portion having an inlet and a second accommodating portion, wherein the restraining guide means is formed; A plurality of rods, one end of which is fitted to be aligned with the first accommodating portion and the second accommodating portion of the support, the musical notes being fitted at the other end; Ejecting means for extracting the rods from the first and second accommodating portions of the support; A carrier installed to rotate relative to the support and moving the rod drawn by the ejecting means in cooperation with the restraint guide means between the first and second accommodating portions of the support; Drive means for rotating the carrier; Automatic musical instrument comprising a control means for controlling the driving of the drive means. The method of claim 1, wherein the ejecting means, A pusher mounted in each of the first and second accommodating parts of the support and supporting the rods; Automatic musical instrument comprising an elastic means for moving the pusher. According to claim 1 or 2, wherein the carrier is formed with an annular flange for preventing the withdrawal of the rods from the first and second receiving portion of the support, the rod is moved on one side of the flange Automatic sheet music device, characterized in that one catch groove is cut to hold. The automatic sheet music apparatus according to claim 1 or 2, wherein the restraint guide means comprises an inner jaw and an outer jaw formed on the support. The automatic sheet music apparatus of claim 1 or 2, wherein each of the first accommodating portion and the second accommodating portion of the support is formed as a ramp to facilitate the withdrawal and entry of the rods. 2. The driving apparatus of claim 1, wherein the driving means comprises a motor and a gear train for transmitting the driving force of the motor to the carrier, and the control means has a push button having a first button and a second button for controlling forward and reverse rotation of the motor. And a switch for controlling the power supplied to the motor in cooperation with a switch and the push switch. 7. The control device as set forth in claim 6, wherein the control means further includes a limit switch operated by the protrusion of the disc cam which rotates in parallel with the gear train and in cooperation with the push switch to control the power supplied to the motor. Automatic sheet music device. 2. The driving apparatus of claim 1, wherein the driving means comprises a motor and a gear train for transmitting the driving force of the motor to the carrier, and the control means has a push button having a first button and a second button for controlling forward and reverse rotation of the motor. And an electronic circuit for cooperating with a switch and the push switch to control power and forward and reverse rotations supplied to the motor.