JPH0997055A - Speed adjustment type disk music box - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve switch operativeness by arranging respective switches, which turn on and off the motor driving source of a music box unit where a disk is set and control the rotating direction and rotating speed, together at an operation part. SOLUTION: This disk music box 1 is equipped with the music box unit 9 which has the disk 3, having many holes 2 formed corresponding to music, set in a box 51 provided with an opening/closing lid 52 and drives the disk by a reversibly DC motor 7 as the motor driving source to play the music, a switch 53 which turns on and off the motor 7, a speed adjusting switch 54 which adjusts the rotating speed of the disk 3, and a power source part 55; and the rotating speed of the disk 3 is adjustable. Here, the switch 53 and speed adjusting switch 54 are arranged together at a control circuit part 56 which connects the motor 7 and power source part 55 together.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disk music box, which rotates a plurality of ratchet wheels to play a vibration valve to produce a sound, with a large number of holes corresponding to songs formed on the disk, and in particular, to determine the rotation speed of the disk. The present invention relates to a speed-adjustable disc music box that can be appropriately adjusted.

[0002]

2. Description of the Related Art A disk music box is known in which a plurality of ratchet wheels are rotated through a plurality of holes formed in a disk corresponding to a music piece to play a vibration valve to play a music piece. For example, in the disc music box described in Japanese Utility Model Laid-Open No. 6-23094, the driving mechanism is manually driven to rotate the disc, which makes it difficult to play at a constant speed. Further, in a disk music box of a type that flips a vibration valve with a ratchet wheel, if the ratchet wheel is not located at the so-called home position, the ratchet wheel may damage the disk when it is mounted on the music box unit. is there.
Therefore, a disk music box has been proposed which has a motor as an electric drive source as a drive source to drive a disk in forward / reverse rotation and has a speed adjusting function.

[0003]

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention However, in a disk music box having a motor for driving the disk in forward / reverse rotation or having a speed adjusting function, a motor on / off switch, a forward / reverse switch, or a speed adjusting switch is used. Switches are placed apart, so the operability is not good,
There is a problem that it does not look good. In addition, a disc music box with a speed adjustment mechanism has a wide speed adjustment range, so that there is an advantage that the speed of a song to be played can be adjusted over a wide range, but a wide speed adjustment range means that the speed adjustment does not sound. If there is not a song to play, the song to be played will be delayed or it will be too uptempo and difficult to hear. Generally, a music box generates a sound by instantaneously playing a vibrating valve with a ratchet wheel or a pin, so it is difficult to generate a sound of the length of a note like an instrument, and the music is played at a relatively early speed. It tends to be easier to hear when played (especially for songs with a slow tempo, this tendency is large).

[0004]

In view of the above, according to the present invention, a disc corresponding to a piece of music is set in a music box unit driven by an electric drive source provided in a box having an opening / closing lid, and is played. In the disk music box to be made, the music box unit in the box, a power supply section for driving the electric drive source, an operation section for controlling the electric drive source, and the set disk are curved and supported by the music box unit. Columns for horizontally setting the disk part were attached, and switch parts for controlling on / off of the electric drive source, a rotation direction, and a rotation speed were collectively arranged on the operation part. According to the second aspect of the invention, the adjustable speed range is set to a range of 25 to 35 seconds per one rotation of the disk.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to the drawings. The disc music box indicated by reference numeral 1 in FIG. 1 has a hole 51 corresponding to a piece of music in a box 51 provided with an opening / closing lid 52.
The disk 3 on which is formed is set, and the music box unit 9 which is driven by the direct-current motor 7 (hereinafter, referred to as "motor 7") capable of rotating in the forward and reverse directions as an electric drive source to sound, and the motor 7 is turned on / off. A switch 53 for performing, a speed adjustment switch 54 for adjusting the rotation speed of the disk 3, and a power supply unit 55 are provided, and the rotation speed of the disk 3 can be adjusted.

The box 51 is a quadrangle formed by assembling wooden boards, and the bottom portion is closed by a bottom plate 510 as shown in FIG. A hinge 60 is fixed to the upper rear portion 51 a of the box 51. The hinge 60 has one end 52a of the opening / closing lid 52.
Is attached, and the opening / closing lid 52 is rotatable with respect to the box 51. Grooves 61 are formed on the inner surfaces 51b on the four sides of the box 51, respectively. Wooden mounting plates 62 that support and fix the intermediate substrate 10 are inserted into the grooves 61, respectively. The mounting plate 62 extends in the front-rear and left-right directions of the box 51 in FIG. 1 and projects from the inner side surface 51 b toward the inside of the box 51. The intermediate substrate 10 is detachably attached to the protruding portion of the attachment plate 62 with a plurality of screws 63.

The opening / closing lid 52 and the box 51 are linked by a link mechanism 64.
Are connected by The link mechanism 64 includes a first lever 65 having a base end 65a rotatably supported by a shaft 66 on an inner lower surface 52b of the opening / closing lid 52, and an end 68a on an inner side surface 51b located on the left side in FIG. And a second lever 68 rotatably supported by 67. Second lever 68
The free end 65b of the first lever 65 is pin-connected to the swing end 68b of the first lever 65, and defines the open position of the opening / closing lid 52.

A square opening 52 is formed at the center of the opening / closing lid 52.
c is formed. The opening 52c is provided in the holding member 5
The inside of the box 50 is closed by the glass G pressed from the back side of the lid by 2d, and the open / close lid 52 is closed.
The disc 3 and the music box unit 9 are visible.

As shown in FIG. 2, the front portion 511 of the box 51 is provided with a recess 69 in the upper portion and an opening 70 in the lower portion. The recess 69 is formed in a size such that the fingertip of a music box operator (not shown) is caught. A drawer 71 having a bottom plate 71a is slidably inserted into the opening 70.

The switch 53 and the speed adjusting switch 54 shown in FIG. 1 are provided in the control circuit section 56 to which the motor 7 and the power source section 55 are connected, and the operating section 50 of the music box.
Is composed. When the switch 53 is in the neutral position shown in FIG. 1, the motor 7 is turned off. When the switch 53 is operated in the direction indicated by the arrow Fo from this position, the motor 7 is rotated in the forward direction, and when operated in the arrow R direction, the motor 7 is rotated in the reverse direction. This is a changeover switch. Here, the forward rotation refers to the direction in which the disc 3 is rotated in the ringing direction indicated by the arrow a, and the reverse rotation is the direction in which the disc 3 is rotated in the direction indicated by the arrow b, as well as the ratchet wheel 11 to be described later. Indicates the direction in which the support shaft 12 is driven so as to rotate in the arrow d direction in FIG.

The speed adjustment switch 54 is composed of a well-known variable resistor for adjusting the amount of voltage supplied to the motor 7. When the speed adjustment switch 54 is rotated in the direction of arrow S, the rotation speed of the motor 7 is reduced and the speed is adjusted in the direction of arrow F. By doing so, the rotation speed of the motor 7 is increased. When the speed adjustment switch 54 is maximally rotated in the direction of arrow S, the control circuit unit 56 rotationally drives the rotation speed of the disk 3 at 1 rotation / 35 seconds, and the arrow F
When the disc is rotated to the maximum direction, the rotation speed of the disk 3 is rotationally driven at 1 rotation / 25 seconds.
Controlling together with 4.

A battery 55b housed in a battery case 55a is used as the power supply unit 55 here. Power supply unit 5
The motor 5, the motor 7, and the control circuit unit 56 are fixed on the intermediate substrate 10 provided in the box 51 and are arranged on the right side of the box 51. Among them, the operation units 50 are collectively arranged in the lower right corner of the intermediate substrate 10 in FIG. The power supply unit 55, the motor 7, the control circuit unit 56, and the operation unit 50 are
It is covered with a wooden cover 57 which is detachable from the box 51.

The cover 57 is a box body having an opening on the bottom side, and an opening 5 for accommodating the operating section 50 in an upper portion 57a thereof.
7a are formed. The operation unit 50 has the opening 57.
It can be operated by facing the outside of the cover 57 from a. On the side portion 57c of the cover 57, as shown in FIG.
A curved portion 57d is formed. This curved portion 57d is
It is formed in an arc shape larger than the outer diameter of the disk 3, and the box 51
It does not interfere with the disk 3 when it is attached to the. A cutout portion 57e extending toward the side surface portion 513 is formed at the center of the curved portion 57d to secure a rotation region of the arm shaft 6 described later.

The frame 9A of the music box unit 9 is made of metal and has a function of resonating the vibration sound of the diaphragm 5. A metal base plate 9B is fixed to the frame 9A, and a center shaft 17 that rotatably supports the disk 3 is erected on the base plate 9B. Music box unit 9
The center shaft 17 is arranged on the center line O, the arm shaft 6 is arranged orthogonal to the center line O, and the arm shaft 6 is arranged on the intermediate substrate 10 so as to correspond to the cutout portion 57e of the cover 57. It is fixed. The center line O is set in the opening / closing direction of the opening / closing lid 52 so that the opening / closing directions of the arm shafts 6 are not the same.

As shown in FIGS. 1 and 2, the intermediate substrate 10 is provided with the disk 3 set in the music box unit 9 in a box 5.
Columns 58 and 59 that are bent upward of 1 are vertically fixed. The struts 58, 59 are arranged on the center line O and have their tips 58a, 5 formed in a spherical shape.
9a is brought into contact with the outer peripheral lower surface 3b of the disk 3.

The holes 2 in the disk 3 are punched in the disk 3 by punching or pressing so as to correspond to the music to be played. A center hole 3a is formed in the disk 3 as shown in FIG. 4, and the center hole 3a is inserted into the center shaft 17 to be rotatably supported by the music box unit 9. Although hard paper is used for the disk 3 here, a flexible film, plastic, or the like may be used.

Next, each component of the music box unit 9 will be described. As shown in FIGS. 3 and 4, the music box unit 9 includes a ratchet wheel unit 4, a diaphragm 5, an arm shaft 6,
A drive unit 8 equipped with a motor 7 is attached to the frame 9A. The ratchet unit 4 has a disk 3 below the disk 3.
Are arranged along the radial direction. This unit 4
Is composed of a plurality of ratchet wheels 11 that engage with the holes 2 and a support shaft 12 that passes through the plurality of ratchet wheels 11. The support shaft 12 is rotatably supported by a cut-and-raised portion 9C of the main plate 9B and a bracket 26 on which the drive unit 8 is mounted.

As shown in FIG. 6, each of the ratchet wheels 11 is rotatably supported independently of each other by a spacer 12a formed integrally with the support shaft 12. Each spacer 12a
Is in proper sliding contact with the end surface of the ratchet wheel 11, and
Gives friction force to. As shown in FIG. 7, the ratchet wheel 11 has a plurality of (four in this case) claw portions 11a formed on its peripheral surface. The claw portion 11a is adapted to engage with the hole 2 of the disk 3 which rotates when the music box is in a playing state, and when engaged with the hole 2, the claw portion 11a is rotationally driven in the direction of the arrow b by a predetermined angle. , The curved surface 11 of the tip 5b of the vibration valve 5a.
It is designed to be played on the b side. Pitch angle θ of claw 11a
Means that the straight portion 11c of the claw portion 11a is the upper surface 5c of the vibration valve 5a.
In the initial state of the ratchet wheel 11 that abuts on the disk 3, the other claw portion 11a that is not in contact with the vibration valve 5a with respect to the disk 3 is set at an angle that does not result in a vertical state.

As shown in FIG. 8, a vibrating plate 5 repelled by the claw portions 11a of each claw wheel 11 is fixed to the frame 9A beside the claw wheel unit 4. This diaphragm 5
The vibrating valves 5a have the same number as the number of the ratchet wheels 11 and are arranged so that the claw portions 11a can be engaged with the tips 5b of the vibrating valves 5a. In this embodiment, a 20-valve diaphragm is used and has a pitch range of 2.5 octaves.

A drive gear 13 is press-fitted into the support shaft 12 as shown in FIG. 4, and can rotate integrally with the support shaft 12. A drive roller 14 is provided on the shaft portion 13 a of the drive gear 13. This drive roller 14 is
The disk 3 is brought into contact with the lower surface 3b of the outer periphery of the disk 3 to rotate the disk 3 by a frictional force.

A column 18 is erected on the frame 9A outside the rotation range of the disk 3. The base end 6 a of the arm shaft 6 is rotatably attached to the column 18. The arm shaft 6 is disposed above the support shaft 12 so as to face each other,
A plurality of disc pressing rollers 19 are provided. The disc pressing roller 19 is formed on each of a plurality of collars 20 rotatably inserted through the arm shaft 6,
While being restricted from moving in the axial direction, they are held rotatably at appropriate intervals. This plurality of disc pressing rollers 1
9 is arranged so as to be located between the ratchet wheels 11,
When the disk 3 is not mounted, it can come into contact with the outer peripheral surface of the spacer 12a, and prevents the arm shaft 6 from excessively falling.

The disk 3 among the plurality of disk pressing rollers 19
The disk pressing roller 19A arranged on the outer peripheral side of the disk 3 is arranged close to the drive roller 14 while being displaced in the radial direction of the disk 3. When the disc 3 is not mounted, the disc pressing roller 19A comes into contact with the drive roller 14 in a state where its center is axially displaced. The diameters of the disc pressing roller 19A and the driving roller 14 are set so as to slightly overlap each other in the roller radial direction when the disc 3 is not interposed between them.

At the tip 6b of the arm shaft 6, a central shaft 17
The locking lever 21 that engages with the bracket 2 having an L-shaped cross section
2 are arranged. The locking lever 21 is rotatably supported by a pin 23 on a long side portion 22A of a bracket 22. The pin 23 has a groove 17a formed in the central shaft 17.
A torsion coil spring 24, which gives a swinging habit in a direction in which the locking lever 21 is engaged, is wound. A hole 22a that loosely fits the central shaft 17 is formed in the long side portion 22A.

The groove 17a is provided at a position where the support shaft 12 supporting the ratchet wheel 11 and the arm shaft 6 are held substantially parallel to each other when locked with the locking lever 21. Arm axis 6
When placed on the central shaft 17 in a locked state, the disc 3 is sandwiched between the disc pressing roller 19 and the drive roller 14 to apply an appropriate pad pressure. That is, the disc pressing roller 19 presses the disc 3 in order to prevent the disc 3 made of a paper board from bending and escaping from the ratchet 11 when the disc 3 rotates and rotates the ratchet 11 in the hole 2. To do.

As shown in FIG. 9, the drive unit 8 includes a worm gear 25 fixed to the shaft 7a of the drive motor 7, and a worm wheel 2 that meshes with the worm gear 25 at right angles.
7. The worm wheel 27 and the worm wheel 27 are integrally rotatable.
The pinion gear 28 meshes with the drive gear 13. The worm wheel 27 is rotatably supported by a bracket 26 fixed to the frame 9A with screws 29, 29. The drive motor 7 is also fixed to the bracket 26. The drive unit 8 decelerates the rotation of the drive motor 7 by these gears and transmits the decelerated rotation to the drive gear 13 to give an appropriate rotational torque to the mounted disc 3.

Here, the setting of the rotation speed of the disk 3 will be described. In general, when a selected song is arranged for a music box, the length of the song and the interval at which the sound is emitted are determined by the size of the drum or disc. For example, since the disk 3 in this embodiment is formed with a diameter of about 18 cm,
In the case of a music of 4/4 time, it is possible to transfer up to 16 measures, and 4 * 16 measures = 64 quarter notes can be played. In addition, music has a speed of a song to be played, and this general performance speed is divided into quarter notes by the Andante (1
From the speed at which a quarter note is played 84 times a minute) to Allegro (1
Think of it as a range of 168 quarter notes per minute). Then, the speed at which 64 quarter notes are played is Andante = 64/84 times = 0.76 seconds /
One time is 0.76 seconds × 64 = ≈48 seconds, and the disk 3 is rotationally driven in one rotation of about 48 seconds.

With Allegro, 64/16
8 times ≈ 0.38 / 1 time 0.38 seconds × 64 pieces ≈ 24 seconds, and the disk 3 is rotationally driven in about 24 seconds per rotation.
On the other hand, a silent section is required between the beginning and the end of the tune, and a non-perforated section in which the hole 2 corresponding to a note is not perforated is provided on the disk 3. Here, the unperforated section is approximately 30
Since it is set to °, the angle that can form the hole 2 is 330
°. Therefore, the actual rotation speed of the disk 3 in Andante is 48 seconds × 360 ° / 330 ° ≈52 seconds, and the actual rotation speed of the disk 3 in Allegro is 24 seconds × 360 ° / 330 ° ≈26 seconds.

That is, 26 seconds to 52 seconds is a basic variable range desired as the rotation speed of the disk 3 per one rotation. When played within this speed range, the music can be played from Andante at the speed of Allegro.
However, as described above in “Problems to be Solved by the Invention”, in general, in a music box, when the rotation speed of the disk 3 is slow, the musical tone is elongated, and it tends to be easier to hear early. The rotation speed of 3 was set in the range of 25 to 35 seconds per one rotation.

The operation of the disc music box 1 having such a configuration will be described. First, in order to set the ratchet wheel 11 to the initial position, the switch 53 is operated in the R direction to rotate the motor 7 in the reverse direction. Then, the support shaft 12 rotates in the reverse direction and each ratchet wheel 11 is rotated.
Due to the action of the friction plate 12a disposed between the claw wheels 11, the claw wheel 11 is simultaneously rotated in the direction of arrow d as shown in FIG.
The claw portion 11a comes into contact with the upper side. Due to this contact, the rotation of the ratchet wheel 11 is hindered, and the ratchet wheels 11 placed at different positions come into contact with the diaphragm 5 as shown by the two-dot chain line in FIG. When the ratchet wheel 11 reaches the initial position, the switch 53 is returned to the neutral position and the rotation of the motor 7 is stopped. Pitch angle θ of the claw portion 11a in the claw wheel 11
Is set at an angle such that the other claw portions 11a are not in a vertical state with respect to the disc 3 in the initial state.
By setting the initial state before mounting, the damage of the disk 3 by the claw portion 11a can be extremely reduced, and the durability of the disk 3 is improved.

After the initial setting is completed, the central hole 3 of the disk 3 is
After inserting b into the central shaft 17, the arm shaft 6 is shown in FIG.
It is rotated in the direction of arrow c from the open state shown by the dotted line. Then, when the hole 22b of the bracket 22 and the central shaft 17 are fitted together, the tip end of the locking lever 17 is urged into the groove 17a so that the arm shaft 6 is substantially parallel to the support shaft 12. Retained. Then, the disc pressing roller 19 holds the disc 3 from above while holding the disc 3 between the disc pressing roller 19A and the drive roller 14.

When the arm shaft 6 is held by the central shaft 17, the rims 3b of the disk 3 are moved upward as shown in FIG. 2 by the columns 58 and 59 arranged on the same center line O as the shaft. Be curved. At this time, since the disc 3 is sandwiched between the disc pressing roller 19 and the ratchet wheel 11 as shown in FIG. 8, the disc 3 is curved around the portion 3R sandwiched between the two, so that the disc pressing The disk portion 3R located between the roller 19 and the ratchet wheel 11 is a horizontal surface. That is,
Since the disk 3 is made of a paper material here, if it is simply arranged on the central shaft 17 in a plane, the outer peripheral side 3b is lowered or undulated, and the ratchet wheel 11 and the hole 2 are satisfactorily engaged. It is possible that it will not. However, since the outer peripheral portion 3b of the disc 3 orthogonal to the arm shaft 6 is lifted by the columns 58 and 59, a linear flat portion is formed in the disc portion 3R between the arm shaft 6 and the ratchet wheel 1. Engagement between the hole 2 and the ratchet wheel 11 is ensured. The operation of the arm shaft 6 completes the mounting operation of the disk 3.

Next, the switch 53 is operated in the direction of arrow Fo to rotate the motor 7 forward. Then, this rotation is decelerated and transmitted to the drive gear 13 to rotate the integrated drive roller 14 and support shaft 12. Drive roller 14
When is rotated, the disk 3 is rotated in the sounding direction indicated by the arrow a in FIG. 1, and the friction force between the support shaft 12 and the spacer 12a causes each claw wheel 11 to move in the direction indicated by the arrow b in FIG. Rotational torque is applied. However, since the disc 3 is located above the ratchet 11, the rotation of the ratchet 11 is suppressed by the unperforated portion of the disc 3 here.

When the disk 3 rotates and the hole 2 is positioned above the ratchet wheel 11, the ratchet wheels 11 facing it rotate one after another, and the claw portions 11a of each ratchet wheel 11 jump into the respective holes 2 and engage. To meet. The claw wheel 11 engaged with the hole 2 is rotated by pushing the claw portion 11a in the moving direction by the edge of the hole 2 that moves with the rotation of the disk 3, and the vibrating valve 5a is positioned below the claw portion. 11a plays the songs one after another to play songs.

When the speed adjusting switch 54 is rotated in the S direction, the resistance value of the variable resistor increases and the rotation of the motor 7 decreases, so that the rotation speed of the disk 3 can be slowed down to a maximum of 25 seconds / 1 rotation. it can. Conversely, the speed adjustment switch 54
When is rotated in the F direction, the resistance value of the variable resistor is lowered, the rotation of the motor 7 is increased, and the rotation speed of the disk 3 can be increased up to 35 seconds / 1 rotation.

As described above, by operating the speed adjusting switch 54, the rotation speed of the disk 3 is changed between 25 seconds and 35 seconds per one rotation, so that the music selected on the disk 3 can be selected in an appropriate speed range. Can be played with. Further, since the switch 53 and the speed adjustment switch 54 are collectively arranged as the operation unit 50 on the intermediate substrate 10, it is possible to perform ON / OFF of the motor 7, the rotation direction, and the rotation adjustment of the motor 7 at one place, and the operability is improved. Will get better.

[0036]

According to the first aspect of the invention, each switch for controlling on / off, the rotating direction and the rotating speed of the electric drive source of the music box unit in which the disk is set is integrated into one operating section. Since it is placed as a switch, the operability of the switch is improved. According to the second aspect of the invention, the speed range of the disk that can be adjusted by the switch is set to 2 per rotation of the disk.
Since it is set within the range of 5 seconds to 35 seconds, it is not played at an extremely fast speed or a slow speed, and it is easy to hear the played music.

[Brief description of drawings]

FIG. 1 is a plan view showing a schematic configuration of a speed-adjustable disc music box showing an embodiment of the present invention.

FIG. 2 is a side sectional view showing a configuration of a disc music box.

FIG. 3 is a plan view showing a configuration of a music box unit.

FIG. 4 is a front view showing the configuration of the music box unit and the operation of the arm shaft.

FIG. 5 is a cross-sectional view showing a structure of a cover.

FIG. 6 is a partially cutaway enlarged view showing a mounting state of the ratchet wheel.

FIG. 7 is a front view of the ratchet wheel.

FIG. 8 is a sectional view of a music box unit.

FIG. 9 is an enlarged plan view showing the configuration of a drive mechanism.

[Explanation of symbols] 1 disk music box 3 disk 7 electric drive source 9 music box unit 50 operation part 51 box 52 open / close lid 53, 54 each switch 55 power supply part 58, 59 prop

Claims (2)

[Claims] 1. A disc music box in which a disc corresponding to a piece of music is set and sounded in a music box unit driven by an electric drive source provided in a box having an opening / closing lid. A power source unit for driving the electric drive source, an operation unit for controlling the electric drive source, and a column for bending the set disc to make a portion of the disc supported by the music box unit horizontal are attached, respectively. A speed-adjustable disc music box, wherein switches for controlling on / off of the electric drive source, a rotation direction, and a rotation speed are collectively arranged in an operation portion. 2. The speed-adjustable disk music box according to claim 1, wherein the speed range adjustable by the switch is set in the range of 25 to 35 seconds per one rotation of the disk.