JP2001188528A - Disk-type music box - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a disk-type music box of such a structure, which enables a hearing person to hear not only an audible compass but ultra-high tone frequency as well. SOLUTION: The disk-type music box 1 has a disk-shaped disk 3, made loadable in a prescribed position within a casing 9 and is constituted to generate the tones, by rotating the disk 3 by a drive source and plucking the vibration valves of diaphragms 5 and 6 arranged on one side of the disk 3 and to amplify the tones, by resonating the vibrations of the vibration valves with the casing 9. An aperture 9a, which is the opening of the space where the diaphragms 5 and 6 are arranged to the outside of the casing 9, is disposed in a direction different from the direction where the disk 3 is arranged, when viewed from the diaphragms 5 and 6, so that the ultra-high tones of the inaudible compass generated by the diaphragms 5 and 6 are led to the outside from the aperture 9b.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disc-type music box capable of loading a disk-shaped disc, and more particularly to a music box capable of hearing an ultra-high sound.

[0002]

2. Description of the Related Art Hitherto, as an example of a device having a sound source inside a housing, various types of disk rotating music boxes have been proposed (see Japanese Patent Application Laid-Open No. 9-97052). Such a disk music box has, for example, a configuration as shown in FIG. The disc music box shown in FIG. 13 includes a motor drive source (not shown),
A disk-shaped disc 101 having a plurality of engaging portions 101a corresponding to the music on one surface, and a ratchet wheel 102 having a plurality of claws 102a on its outer periphery capable of engaging with the engaging portions 101a of the disc 101; , A vibration plate 103 having a vibration valve 103 a which is vibrated by a claw 102 a of a ratchet wheel 102 to produce a sound
, A frame 104 that supports the diaphragm 103, and a housing (not shown) that accommodates these members inside and resonates the vibration of the diaphragm 103 when playing sound.

[0003] When the disk 101 is rotated by a motor drive source, the disk type music box has an engaging portion 10.
The pawl 102a of the ratchet wheel 102 is engaged with 1a so that the ratchet wheel 102 rotates. When the ratchet wheel 102 rotates, the pawl 102a flips the vibration valve 103a of the diaphragm 103, and the vibration valve 103a vibrates, so that the vibration resonates in the housing. That is, the vibration is transmitted to and amplified by any member such as a plate-like or columnar member in the housing.

[0004] An opening door (not shown) of a housing is provided above the disk 101 in FIG.
This is a disc-type music box,
This is for making the surface of the disk 101 (upper surface in FIG. 13) visible to the listener so that the user can enjoy watching the rotation of the disk 101, and for facilitating attachment and detachment of the disk 101. Since the opening door is opened at the time of sounding, the vibration resonating in the housing by the above-described operation is transmitted as sound to the outside from the opening portion where the opening door is opened.

[0005]

However, in the above-mentioned disc-type music box, the disc 101 is disposed between the diaphragm serving as a sound source and the opening door for emitting the sound to the outside. . Therefore, part of the sound is blocked by the disk 101 and is not guided to the outside, and does not reach the listener's ear.

That is, on the side of the opening door of the above-mentioned disc-type music box, sound amplified by resonance with members in the housing can be heard by the listener, but the sound that the listener can hear is: Only sounds in a frequency range of 20,000 Hz or less, which is generally called an audible range. Even in the sound in such a range, even if the direction in which the sound is guided is blocked by the disk 101, the housing resonates with a strong vibration force, and the resonated sound is guided to the outside. That is, in the case of a sound of 20,000 Hz or less, the direct sound directly propagated from the diaphragm 103 in the direction of the open door or the reflected sound reflected and propagated to some member inside the housing is shielded by the disk 101 and is transmitted to the outside. Although it is not emitted, the sound that is transmitted to all parts of the housing and resonated,
The door is guided to the outside through the open door, so that the listener can hear it.

On the other hand, recently, it has become known that a sound in a supersonic range of 20,000 Hz or more promotes generation of an α-wave from the brain of a listener. When this α-wave is generated, humans are mentally relaxed, and the α-wave is considered preferable for stress release, creative activities, and the like.

[0008] However, although a sound (ultra high frequency) in a frequency range exceeding 20,000 Hz, which is an audible sound range, is generated in a disc music box, the vibrating force increases as the case resonates. Not strong. Therefore, if the disk 101 is arranged between the diaphragm 103 and the open door, a direct sound that is going to propagate directly from the diaphragm 103 to the open door side or a reflected sound that is going to be reflected and propagated to some member is generated. Cannot be transmitted to the open door side. For this reason, in the above-mentioned disc-type music box, it is not possible to guide the ultra-high sound having the effect of promoting the generation of α waves to the brain waves of the listener to the outside, and the listener can hear only a part of the sound (audible sound range). It is something that can not be done.

[0009] The object of the present invention, in view of the problems described above,
It is an object of the present invention to provide a disc-type music box having a structure that enables a listener to hear not only an audible sound range but also a super high-pitched sound.

[0010]

In order to achieve the above object, according to the present invention, a disk-shaped disk can be loaded at a predetermined position in a housing, and the disk is rotated by a drive source to thereby drive one of the disks. A sound is generated by flipping the vibration valve of the diaphragm arranged on the surface side, and the vibration of the vibration valve resonates in the housing to amplify the sound. In the direction different from the direction in which the diaphragm is arranged, an opening is provided as an opening to the outside of the housing of the space in which the diaphragm is arranged, and the ultra-high sound in the non-audible range generated by the diaphragm is guided to the outside from the opening. Like that. Therefore, not only the audible sound range but also the super-treble is guided to the outside of the housing from the opening, so that the listener can hear it.

According to another aspect of the present invention, in addition to the above-mentioned disc-type music box, the opening is formed on a surface orthogonal to the disc, and the diaphragm is attached so as to be inclined so as to face the opening. . Therefore, the direct sound from the diaphragm is more reliably guided toward the opening and emitted to the outside, so that the listener can hear not only the sound in the audible region but also the ultra-high sound.

Another aspect of the present invention is directed to an internal space which is continuous with a space formed between the disk and the frame on which the diaphragm is mounted and which is exposed to the surface of the disk on the diaphragm side, in addition to the above-mentioned disk-type music box. Are provided as openings. Therefore, the super-treble, which mainly propagates directly by sound, is more easily guided to the outside, and the listener can hear it.

According to another aspect of the present invention, in addition to the above-described disc-type music box, two diaphragms are provided, one of which is arranged in parallel with the disc and the other is inclined with respect to the disc. Therefore, the super-treble is more reliably guided to the outside, and the listener can hear it.

According to another aspect of the present invention, in addition to the above-described disc-type music box, a through hole is provided at a position in the frame opposite to the rear plane portion of the diaphragm, and an ultra-high sound generated from the diaphragm passes through the through hole. , And lead to the outside through the opening. Therefore, the ultra-high sound that has passed through the through-hole is guided to the outside from the opening, so that the listener can hear not only the audible sound range but also the ultra-high sound.

According to another aspect of the present invention, in addition to the above-mentioned disc-type music box, the opening is disposed at a position where an ultra-high sound passing through the through hole is directly guided to the outside without reflection. Therefore, the direct sound from the diaphragm is guided to the outside directly from the opening without being reflected on the housing or the like, and the listener can hear the ultra-high sound more clearly.

According to another aspect of the present invention, a disk is loaded at a predetermined position in a housing and is not removable or can be removed. Therefore, by devising the loading position, it is possible to enhance the aesthetics of the device or to enhance the operability at the time of attachment and detachment.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a disk-type music box according to the present invention will be described below with reference to FIGS.

As shown in FIGS. 1, 2 and 3, the disc-type music box 1 includes a motor 20 as a drive source, a large number of ratchet wheels 4, two diaphragms 5, 6, and each of the diaphragms 5, 6. A music box unit 30 having frames 7 and 8 for supporting the disc, and a disc 3 mounted on the music box unit 30 and rotated by a motor 20.
And a housing 9 that accommodates the members of the sound source unit 2 therein and resonates the vibrations of the diaphragms 5 and 6.
And is composed of The disc-type music box 1 rotates the disc 3 by the driving force of the motor 20 so that the catch 41 of the ratchet 4 is hooked by the engaging portion 3 a formed on one surface of the disc 3. Is rotated in the direction of arrow A in FIG. Then, a claw 41 provided on the outer periphery of the ratchet wheel 4 plays the sound by playing the vibration valves 51 and 61 of the vibration plates 5 and 6.

The housing 9 supports the frames 7 and 8 to which the vibration plates 5 and 6 of the music box unit 30 are fixed, and resonates the sound generated by the sound source unit 2 (vibrates the members to generate air vibrations). The sound is transmitted by transmitting as). For this reason, the casing 9 itself vibrates during the performance of the disc-type music box 1 and transmits sound to the outside without the opening door 9a or the openings 9b, 9c, 9d and the like described later. .

The housing 9 has a space inside and a cubic appearance, and has a mounting plate 91 for mounting the music box unit 30 in its internal space.
And an amplification plate 92 for further amplifying the sound resonating with the mounting plate 91, two soul pillars 93 and 94 connecting the mounting plate 91 and the amplification plate 92, and a curved plate 95. I have.

The housing 9 has an opening / closing door 9a which can be opened and closed to take out the disk 3 and to guide the mid-high sound resonated mainly inside the housing 9 to the outside, and mainly generated from the diaphragms 5 and 6. A first opening 9b serving as an opening for guiding the ultra-treble to the outside, a second opening 9c serving as an opening for mainly guiding the mid-treble resonating inside the housing 9, and a housing 9 mainly. It has a large opening 9d serving as an opening for guiding the ultra-low sound resonating inside to the outside, and an upper opening 9j serving as an opening for opening the opening / closing door 9a and guiding the inside resonance sound to the outside. I have.

The opening / closing door 9a is provided on the upper surface of the housing 9 in FIG. 1, and opens and closes vertically about one end as a center of rotation. And this opening and closing door 9
By opening a, the disk 3 can be replaced from the upper surface of the housing 9 and the like, and the operability is good. It is desirable that the opening and closing door 9a be open during the music box performance, so that the sound resonated inside the housing 9 can be opened by opening.
The door 9a is guided to the outside.
As a result, a person who is in the vicinity of the disc-type music box 1 can hear the sound resonated inside the housing 9. Even if the opening / closing door 9a is closed during the music box performance, the housing 9 itself vibrates and the other openings 9b, 9
Sound is sufficiently emitted from c and 9d to the outside.

When the disk 3 is loaded into a predetermined position, the open / close door 9a can directly receive the direct sound generated from the vibration plates 5 and 6 (without resonance in the housing 9). Sound waves that propagate directly in the air and reflected sounds that are transmitted by being reflected by some member (similarly to the direct sound, propagate through the air while being reflected by each member without resonating in the housing 9). Is transmitted to a position where it is not transmitted. That is, the disk 3 is
6 and the opening and closing door 9a, the direct sound and the reflected sound from the diaphragms 5 and 6 are cut off by the disk 3,
It does not reach this opening / closing door 9a. Therefore, the sound guided to the outside from the opening / closing door 9a is not a direct sound or a reflected sound, but resonates in the housing 9 so that
The sound is amplified inside.

Here, the sound that easily resonates in the housing 9 is a sound in an audible sound range (a sound in a sound range having a frequency of 20,000 Hz or less), and hardly resonates and mainly propagates as a direct sound or a reflected sound. Ultra high-pitched sounds (sounds in the frequency range of 20,000 Hz or more) are less likely to be guided to the door 9a.

The first opening 9b is formed from the upper end of the front surface (left end surface in FIG. 1) of the housing 9 to the position where the mounting plate 91 is attached.
c is formed from the mounting plate 91 on the same surface to the position where the amplification plate 92 is mounted. These openings 9
b and 9c are a series of openings, and an opening / closing lid 9f for opening and closing these openings 9b and 9c is provided on the front surface of the housing 9.

That is, the first and second openings 9b, 9c
Are both provided on a surface orthogonal to the disk 3, and
The first opening 9b is on the opening / closing door 9a side of the housing 9 and the second opening 9c is on the amplifying plate 92 side (bottom surface 96) of the mounting plate 91.
Side). Therefore, the first opening 9 b is arranged so as to be an outlet communicating with the outside of the housing 9 from the space vertically sandwiched between the disk 3 and the mounting plate 91 when viewed from the diaphragms 5 and 6. . Thus, the opening 9b guides the direct sound and the reflected sound from the diaphragms 5 and 6, particularly the direct sound and the reflected sound from the diaphragm 6, to the outside (see arrows in FIG. 1).

For this reason, the ear of the person in front of the disc-type music box 1 mainly propagates not only the sound in the audible sound range resonated in the housing 9 and guided to the outside but also the direct sound and the reflected sound. Even ultra-high sounds (sounds having a frequency of 20,000 Hz or more) close to the nature of the light to be heard can be heard well. As a result, the brain wave of the listener is in a state where an α wave is easily generated. That is, the disc-type music box 1 according to the embodiment of the present invention
The ultra-high sound mainly propagated by direct sound or reflected sound is transmitted to the first opening 9b.
Can be guided to the outside sufficiently and can be heard by the listener, so that the listener can be more relaxed.

The second opening 9c is attached to the mounting plate 91.
It is arranged on the lower side and does not communicate with the space where the diaphragms 5 and 6 are arranged. Therefore, the second opening 9
Similar to the above-described upper opening 9j, direct sound and reflected sound from the diaphragms 5 and 6 hardly reach c. The second opening 9c is for guiding the sound that resonates with the mounting plate 91 and the amplification plate 92 integrated by the soul pillars 93 and 94, mainly the middle and high frequency sounds in the audible band, to the outside. .

The large opening 9d is provided below the front surface of the housing 9 (the left end surface in FIG. 1). The large opening 9d is provided with the upper opening 9j and the first,
The distance from the diaphragms 5 and 6 is farther than the second openings 9b and 9c. For this reason, the ultra-low sound that easily resonates is mainly amplified in the housing 9, the amplifying unit 92, and the large space S, is emitted to the large opening 9d side by the curved plate 95, and is guided to the outside from the large opening 9d. It has become.

When the sound in the ultra-low range is guided from the large opening 9d, the super-high sound in the non-audible band guided from the first opening 9b, the upper opening 9j and the second opening 9c are obtained.
The sound in a wider range is well-balanced, and is guided to the front of the housing 9 together with the middle and high range sounds in the audible band derived from the audio signal. Note that the sound guided from the upper opening 9j is directed forward (to the left in FIG. 1) by the opening / closing door 9a which is arranged to be inclined as shown in FIG.

The mounting plate 91 is a plate-like member for mounting the sound source 2. This mounting plate 91 is
Two parallel portions 91a and 91b attached in parallel to the bottom surface 96 of the housing 9, and the two parallel portions 91a and 91b;
And a slope 91c formed by an approximately 45-degree inclined surface that connects 1b with a step. The frame 7 to which the diaphragm 5 arranged parallel to the disk 3 is fixed contacts the upper parallel portion 91a of the slope 91c of the mounting plate 91. A frame 8 in which the diaphragm 6 is arranged to be inclined with respect to the disk 3 and fixed so that the surface faces the first opening 9b is in contact with the slope 91c. With this configuration, the two diaphragms 5,
6 is arranged so that the diaphragm 6 is shifted by 45 degrees from the position symmetrical by 180 degrees.

The support shaft 1 having rollers 11a and 11b at its distal end for supporting the vicinity of the outer peripheral edge of the disk 3 when the disk 3 is loaded is provided on the parallel portion 91a.
2a and 12b, and the disk 3
The supporting shafts 12c and 12d having rollers 11c and 11d for supporting the vicinity of the outer peripheral edge of the disk 3 at the time of loading are respectively provided upright.

When the disk 3 is driven by the motor 20, a force from the ratchet wheel 4 engaging with the engaging portion 3a and a force from the sprocket 31 engaging with the driving engaging hole are applied to the disk 3, so that the disk 3 floats as a whole. I tried to go up, but this floating
It is set to be suppressed by 4. These rollers 11
A, 11b, 11c, and 11d support the vicinity of the outer peripheral end of one surface of the disk 3 so that the disk 3 is slightly warped in cooperation with the holding of the arm 34. In this embodiment, four rollers 11a,
11b, 11c and 11d are arranged so as to cover about a half circumference centering on the engagement position between the disc 3 and the ratchet wheel 4,
You may arrange | position at equal intervals all over the disk. The reason why the four rollers 11a to 11d are arranged only in the above-mentioned position in only about a half circumference is to ensure that the disc 3 and the ratchet wheel 4 are securely and smoothly engaged with each other. This is because a similar arrangement is not necessary for the opposite side portion where 4 is not engaged.

The amplifying plate 92 is mounted in the housing 9 so as to be parallel to the mounting plate 91 at a predetermined interval. That is, the amplification plate 92 is attached to the mounting plate 91.
Similarly to the above, two parallel portions 92a and 92b attached in parallel to the bottom surface 96 of the housing 9 and a sloped slope 92c that connects the two parallel portions 92a and 92b with a step are provided. It has what it has.

The mounting plate 91 and the amplification plate 92 are
Each of three of the four side surfaces of the housing 9, specifically,
It is fixed to the inner walls of both left and right side surfaces 9g and 9h and the back surface 9e, and is connected by two soul pillars 93 and 94. The space between the mounting plate 91 and the amplification plate 92 formed by the two soul pillars 93 and 94 is:
It is a space for propagation of vibration in the housing 9. The two pillars 93 and 94 are provided in the vicinity of positions overlapping with the vibrating plates 5 and 6 attached to the attaching plate 91, respectively. Vibration is efficiently amplified by the amplification plate 9
2 for communication.

The curved plate 95 is converted into air vibration by the large space S or the vibration propagated from the vibration plates 5 and 6 to the mounting plate 91, the soul pillars 93 and 94, the amplification plate 92 and the housing 9. This is a member for efficiently guiding the vibration to the outside from the large opening 9d. Specifically, one end of the housing 9
Is fixed to the front end of the bottom surface 96 (the lower end of the large opening 9d), the other end is fixed to a middle part of the back plate 9e of the housing 9 in the vertical direction, and is curved at a predetermined curvature. .

One disk 3 corresponds to one music piece. Therefore, the disc 3 corresponding to the music selection is moved to the opening / closing door 9a.
To be mounted in the housing 9 and removed after the performance. As shown in FIG. 3, on one surface of the disk 3, a plurality of engaging portions 3a formed according to the music are provided. The disk 3 is configured to rotate by the rotational driving force of the motor 20, and is engaged with a sprocket 31 fixed to a tip of a rotation shaft 20 a (see FIG. 5) of the motor 20 near an outer peripheral edge. A corresponding driving engagement hole (not shown) is provided. And disk 3
Is rotated by receiving the driving force from the driving engagement hole by the rotation of the sprocket 31, and the engaging portion 3a moves while engaging with the pawl 41 formed on the outer periphery of the ratchet wheel 4, whereby the ratchet wheel 4
Is to be rotated.

The music box unit 30 drives the disk 3 to rotate, rotates the ratchet wheel 4 by the rotation of the disc 3, and causes the claws 41 of the ratchet wheel 4 to play the vibration valves 51 and 61 to generate a sound. Has become. The music box unit 30 is fixed to a mounting plate 91 in the housing 9. As shown in FIGS. 4 and 5, the music box unit 30 includes a motor 20 as a driving source, a sprocket 31, a large number of ratchet wheels 4, diaphragms 5, 6, frames 7, 8, a holder 32, 33, an arm 34, a shaft 10, and a guide 35.

The motor 20 is fixed to the end face of the holder 32 by screws. The rotation shaft 20a of the motor 20 is inserted into a center hole 32f (see FIG. 7) formed in the motor holding portion 32a of the holder 32, and advances to the other side of the holder 32. A disk-shaped sprocket 31 is fixed to the tip of the rotating shaft 20a of the motor 20.

The sprocket 31 has an engaging portion 31b on the outer peripheral edge which engages with a driving engaging hole formed along the outer peripheral portion of the disk 3.
By rotating a, the disk 3 is driven to rotate while hooking the drive engagement hole of the disk 3 with the engagement portion 31b.

The diaphragm support 7a of the frame 7 has
As shown in FIG. 5, a diaphragm 5 arranged in parallel with the disk 3
Are fixed with screws. The vibration plate 5 has the same number of comb-shaped vibration valves 51 as the ratchet wheel 4.
The one valve tip is disposed so as to be able to engage and disengage with a pawl 41 formed on the outer periphery of the ratchet wheel 4. Each of the vibration valves 51 is formed so as to have a different length.
The length of the pitch determines the pitch. In addition,
A weight 51a for generating a low sound and for prolonging the vibration is welded to the vibration valve 51 corresponding to the low sound range.

Further, a diaphragm 6 installed at an angle of about 45 degrees with respect to the disk 3 is fixed to the diaphragm supporting table 8a of the frame 8 by screws. The diaphragm 6 has the same number of comb-shaped vibrating valves 61 as the ratchet wheel 4 like the diaphragm 5, and the valve tip of the vibrating valve 61 is a pawl 41 formed on the outer periphery of the ratchet wheel 4. It is arranged so that it can be disengaged. Each vibration valve 61 is also formed to have a different length. The vibration valve 61 corresponding to the bass range has a weight 61a having the same effect as the weight 51a described above.
Are joined by welding. Note that the vibration valves 51 and 61 that are repelled almost simultaneously by the same ratchet wheel 4 are formed so that their pitches slightly deviate, so that the vibration valves 51 and 61 generate an appropriate beat.

The frames 7 and 8 are shown in FIGS.
As shown in the figure, two holders 32 arranged at both ends,
33, they are connected at a predetermined angle.
That is, the frame 7 is connected to the parallel portion 91a of the mounting plate 91.
And the frame 8 is attached to the slope 91 of the mounting plate 91.
The frames 7, 8 are connected at an angle of about 135 degrees so as to abut on c. Note that an inclined surface 8b of about 45 degrees is provided at one end of the frame 8 disposed so as to be in contact with the slope 91c and near the holder 33 so as to be firmly in contact with the other frame 7. Is formed.

As shown in FIGS. 6 and 9, a guide 35 for rotatably supporting a large number of ratchet wheels 4 is integrally formed at the boundary between the frame 7 and the frame 8. I have. This guide 35 is used to connect each ratchet wheel 4 to the ratchet wheel 4 on both sides.
It is formed of a comb-shaped branch plate to isolate from
The guide rods 35a are arranged such that the respective ratchet wheels 4 are arranged between the branch plates in a state where the respective ratchet wheels 4 are loaded on the guide rods 35a.
Is mounted on the groove 35b of the guide 35, so that each ratchet wheel 4 is rotatably disposed around the guide rod 35a.

A plurality of claws 4 are provided on the outer peripheral edge of each ratchet wheel 4.
1 is provided. Each claw 41 can be engaged and disengaged with the engaging portion 3a of the disk 3, and can be disengaged from the valve tips of the vibration valves 51 and 61 of the vibration plates 5 and 6, respectively. The ratchet wheel 4 is driven by the disk 3 and simultaneously vibrates the vibration valves 51 and 61 of the vibration valves 5 and 6 to vibrate the vibration valves 5 and 6 and generate sound.

As shown in FIG. 7, the holder 32 includes a motor holding portion 32a for holding the motor 20, a fixing portion 32b for fixing the frame 7 with screws, and a fixing portion 32b for fixing the frame 8 with screws. A fixing portion 32c and an arm holding portion 32d serving as a pivot of the arm 34 are provided. Note that both the fixing portions 32b and 32c and the arm holding portion 32
“d” extends outwardly of the substantially square motor holding portion 32a. A groove 32e for locking the pivot of the arm 34 is provided at the tip of the arm holding portion 32d. The arm 34 is held in the groove 32e by the arm holding portion 32d.
When a pin (not shown) is inserted from both outer sides of the groove 32e, the groove 32e rotates about the center of rotation.

As shown in FIG. 8, the holder 33 has an engaging hole 33a with which the shaft 10 is engaged, a fixing portion 33b for fixing the frame 7 by screws, and a fixing portion 33b for fixing the frame 8 by screws. And a fixing portion 33c. Note that the shaft 10 is configured to allow the rotation center hole of the disk 3 to pass therethrough and to hold the tip of the arm 34. The distal end of the arm 34 is, as shown in FIG.
It is held on the shaft 10 and is also held on the shaft 10 by inserting the arm cover 37 into the shaft 10.

The arm 34 has a rotation center hole formed in the shaft 10.
It is a holding member for the disk 3 inserted and loaded into the disk. That is, when the disc 3 is driven by the motor 20, a large force is applied from the ratchet wheel 4 and the sprocket 31, and the arm 34 applies such force to the disc 3.
Has a role of preventing the engaging portion 3 a and the driving engaging hole from coming off from the ratchet wheel 4 and the sprocket 31. The arm 34 is rotatable about the holder 32, and when the disc 3 is removed or loaded, the arm 34 is rotated upward as shown by a two-dot chain line in FIGS. After the loading, the disk 3 is turned downward as shown by the solid line to hold down the disk 3.

In the description of the above embodiment, when only the opening and closing door 9a is provided, the direct sound and the reflected sound from the diaphragms 5 and 6 do not reach the listener because they are shielded by the disk 3.
In particular, it has been stated that a sound having a property like light and having no resonance, such as an ultra-treble, cannot be guided to the outside. The applicant has verified the fact as described below.

FIGS. 10 and 11 show experimental music boxes prepared by the applicant in order to experiment how much the sound volume is affected when the disk 3 blocks sound propagation.

The experimental music box shown in FIG. 10 has a substantially rectangular cylindrical housing 201, a mounting plate 202 mounted inside the housing 201 so as to be orthogonal to the side wall 201 a of the housing 201, and A music box unit 203 fixed on a plate 202 and a music box unit 203
Disk 204 (equivalent to disk 3) loaded in
It is composed of The music box unit 203 includes a motor 205, a sprocket 206, and a large number of ratchet wheels 20.
7, two diaphragms 208 arranged in parallel to the mounting plate 202, a frame 209 for fixing the two diaphragms 208, and an arm 210. It is loaded so as to be disposed between the diaphragm 208 and the ratchet wheel 207.

The music box unit 203
When the sprocket 206 is rotated by the rotation of the motor 205, the disk 204 whose outer peripheral end is engaged with the outer peripheral end of the sprocket 206 rotates, and the rotation of the disk 204 causes the ratchet wheel 207 to rotate. The drive unit is configured to generate a sound by playing a vibration valve (not shown) with the pawl of the ratchet wheel 207.

In this experiment, a first microphone 220 for recording sound is installed above the disk 204 loaded in the music box unit 203. That is, the disk 204 is arranged between the first microphone 220 and both diaphragms 208 so that the direct sound and the reflected sound generated from the diaphragm 208 are shielded by the disk 204 and hardly reach the first microphone 220. Have been.

On the other hand, below the mounting plate 202, the first
A second microphone 230 for recording sound having the same performance as that of the microphone 220 is provided. As shown in FIG. 11, the mounting plate 202 is provided with a through hole 202a, and the frame 20 in which the diaphragm 208 is fixed on the upper side.
9 also has a through hole 209a. For this reason, the second microphone 230 is connected to these two through holes 202.
a, 209a means that it is installed at a position where there is no obstruction between it and the diaphragm 208. Note that the distance T1 from the first microphone 220 to the diaphragm 208 and the distance T2 from the second microphone 230 to the diaphragm 208 are equal.

In such a situation, the music box unit 20
The first microphone 22 drives the first microphone 22 to play a sound.
Recording of sound at each position by using the 0 and the second microphone 230 resulted in the results shown in the graph of FIG.

FIG. 12 is a graph showing the relationship between the frequency [Hz] of the sound recorded by the first microphone 220 and the second microphone 230 and the sound intensity [dB]. According to this graph, the sound recorded by the second microphone 230 without the occlusion by the disk 204 is:
The sound is always louder [dB] irrespective of the frequency [Hz] as compared to the sound recorded by the first microphone 220 shielded by the disk 204. In particular, the difference becomes remarkable in a frequency band in which the frequency [Hz] exceeds 20 kHz (= 20,000 Hz) and becomes a super-treble sound in an inaudible range. As a result, transmission of a sound in a frequency band of 20,000 Hz or more, which is called a super-high sound, is significantly prevented when there is a shield such as the disk 204, and conversely, when there is no shield, a relatively large sound [dB] ] Was transmitted.

Based on the above experimental results, as described above, in the disc-type music box according to the embodiment of the present invention, the generation of α waves from the brain waves of the listener is promoted to the outside of the ultra-high sound which has a high effect of relaxing the listener. Derivation of disk 3
In other words, a configuration in which the first opening 9b for communicating a space where the surface of the disk 3 on which the diaphragms 5 and 6 are disposed with the external space is communicated with the external space is provided. I have. In the above-described embodiment, the first opening 9 b is provided so that the sound generated by the vibration of the vibration valve 61 of the one vibration plate 6 is guided to the outside directly or while being reflected by the disk 3 or the mounting plate 91. Because
In particular, direct sound is easily guided to the outside.

Although the above-described embodiment is an example of a preferred embodiment of the present invention, the present invention is not limited to this, and various modifications can be made without departing from the spirit of the present invention. . For example, in the disc-type music box 1 according to the above-described embodiment, the driving source is the motor 20.
In particular, the drive source need not be a motor but may be another method such as manual operation.

In the disk-type music box 1 of the above-described embodiment, the diaphragm 6 is provided to be inclined with respect to the disk 3 so that the direct sound or the reflected sound generated from the diaphragm 6 is externally transmitted from the first opening 9b. The diaphragm 6
Does not have to be particularly inclined. In addition, one of the diaphragms 5 and 6 may be omitted and one diaphragm may be used.

Further, in the above-described embodiment, the diaphragm 6 is arranged at a position shifted from the 180-degree symmetrical position with respect to the diaphragm 5 by about 45 degrees, but the angle may be any number. The angle of the diaphragm 6 becomes more efficient as it inclines with respect to the disk 3, and most efficiently when it inclines at 90 degrees (perpendicular positional relationship), and direct sound is transmitted through the first opening 9 b.
Will be led to. However, in the present embodiment, the weights 51a, 61a fixed to the vibration valves 51, 61 for ultra-low sound of the respective vibration plates 5, 6 are inclined at an angle of about 45 degrees, which is the maximum as long as the weights 51a, 61a do not interfere. .

The position of the first opening 9b, that is, the vicinity of the upper end of the front part of the housing 9 is not used as a super-high sound outlet, and a frame and a mounting plate on which a diaphragm is mounted as in the above-mentioned experimental music box. May be provided with a through hole, and direct sound passing through the through hole may be guided to the outside from an opening provided below the mounting plate. Even if you do this,
As in the configuration of the above-described embodiment, an ultra-high sound that propagates only as a direct sound or a reflected sound is guided to the outside and reaches the ear of the listener, and the generation of an α wave in the brain wave of the listener can be promoted. it can.

In this case, if the diaphragm, the through-hole, and the opening, which are sound sources, are arranged in a straight line, the direct sound is more effectively guided directly from the opening to the outside. As a result, the super high pitched sound can be more efficiently guided to the outside. Specifically, the sound shown in FIG. 10 is turned 90 degrees while the left side is turned down and the right side is turned up, that is, the sound is turned 90 degrees so that the listener looks at the back side of the diaphragm (the state of FIG. 11). You may listen.

In the above-described embodiment, the large opening 9d for guiding the ultra-low sound range to the outside is provided on the front surface of the housing 9, but the large opening 9d may be omitted. Further, the curved plate 95 for guiding sound to the large opening 9d can be omitted.

[0064]

As described above, according to the disc-type music box of the present invention, the case in which the sound source section is housed therein is superimposed in a direction different from the surface facing the disc when viewed from the diaphragm. With the opening for guiding the high frequencies to the outside, not only sounds in the audible range but also ultra-high frequencies are guided from the openings, and the listener can hear it. As a result, it has the effect of generating an α wave in the brain wave of the listener,
This is a disc-type music box that can relax the listener and give a sense of comfort.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing a disk-type music box according to an embodiment of the present invention.

FIG. 2 shows the disc-type music box of FIG.
It is the front view seen from the direction.

FIG. 3 is an enlarged sectional view showing the vicinity of a music box unit of the disc-type music box of FIG. 1;

FIG. 4 is a front view of the music box unit of the disc-type music box of FIG. 2 as viewed from the direction of arrow IV in FIG. 2;

FIG. 5 is a bottom view of the music box unit when FIG. 4 is viewed from an arrow V direction.

FIG. 6 is a front view showing a frame and both holders and a guide for connecting each frame by removing members such as a motor from the music box unit of FIG. 4;

FIG. 7 is a right side view as viewed from the direction of arrow VII in FIG. 6;

8 is a left side view as seen from the direction of arrow VIII in FIG. 6,
It is a figure which abbreviates and shows the frame of the back side.

FIG. 9 is a plan view seen from the arrow IX direction of FIG. 6;

FIG. 10 is a longitudinal sectional view of an experimental music box prepared by the applicant for experimenting to what extent the sound is affected when the disk blocks sound propagation.

FIG. 11 is a bottom view as seen from the direction of arrow XI in FIG. 10;

12 is a graph showing an experimental result of a sound volume using the experimental music box shown in FIG. 10, and showing sound recorded by two microphones in relation to frequency and sound volume.

FIG. 13 is a plan view showing a main part of a conventional disc-type music box.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Disc-type music box 2 Sound source part 3 Disk 3a Engaging part 4 Claw wheel 5, 6 Vibrating plate 7, 8 Frame 9 Housing 9b First opening 20 Motor (drive source) 41 Claw 51, 61 Vibration valve

Claims (7)

[Claims] 1. A disk-shaped disk can be loaded at a predetermined position in a housing, the disk is rotated by a drive source, and a vibration valve of a vibration plate arranged on one surface side of the disk is flipped. In a disk-type music box that generates sound at the same time and amplifies the sound by resonating the vibration of the vibration valve with the housing, in a direction different from the direction in which the disk is arranged as viewed from the diaphragm. An opening that becomes an opening to the outside of the housing of the space in which the diaphragm is disposed, and an ultra-high sound in a non-audible range generated by the diaphragm is guided to the outside from the opening. Disc-type music box. 2. The apparatus according to claim 1, wherein the opening is formed on a surface orthogonal to the disk, and the diaphragm is attached to be inclined so as to face the opening. Disc-type music box. 3. An opening provided as an opening of an internal space which is continuous with a space formed between the frame on which the diaphragm is mounted and the disk and which is exposed to a surface of the disk facing the diaphragm. 3. The disc-type music box according to claim 1, wherein 4. The disk-type music box according to claim 1, wherein two vibration plates are provided, one of which is installed parallel to the disk and the other is inclined with respect to the disk. apparatus. 5. A through-hole is provided in the frame at a position facing the rear flat surface of the diaphragm so that an ultra-high sound generated from the diaphragm passes through the through-hole and is guided to the outside from the opening. 2. The disc-type music box according to claim 1, wherein 6. The disc-type music box according to claim 5, wherein the opening is disposed at a position where an ultra-high sound passing through the through hole is directly guided to the outside without reflection. 7. The disk-type music box according to claim 1, wherein the disk is loaded at a predetermined position in a housing, and is configured to be non-removable or removable.