JPH08101680A - Harmonica - Google Patents

Abstract

PURPOSE: To prevent resonance and improve the balance of sounding, timbre, and loudness by providing a subordinate wind box in a wind box together and then providing a communication opening for the subordinate wind box at the inner part of the wind box. CONSTITUTION: In an air hole which easily interferes with the vibration of a reed 3, e.g. the wind box 5-1 on the lowest-pitched sound side, a partition wall 11 is formed at a right angle to the reed 3 and almost parallel to the length direction of the wind box 5-1 to form the subordinate wind box 50a. Consequently, the apparent wind box length, i.e., the wind box length to the sectional area of a flow passage is made long to lower the natural vibration of the air in the wind box 5-1, thereby shifting the natural vibration frequency to a frequency where there is no influence upon the vibration of the reed 3. Consequently, the vibration of the air in the wind box 5-1 and the vibration of the reed 3 do not interfere with each other, so neither deterioration in sounding nor variation in loudness and timbre is caused and the balance of the sounding, timbre, and loudness is improved.

Description

Detailed Description of the Invention

[0001]

This invention relates to harmonica,
In particular, the present invention relates to a harmonica in which the natural frequency of the air in the whistle chamber is lowered so as not to interfere with the vibration of the reed, and the pronunciation, volume, tone color, etc. can be improved.

[0002]

2. Description of the Related Art This type of harmonica known as a type of reed instrument is structurally composed of a harmonica body, a reed as a sounding body, and a cover.
The harmonica body has a whistle chamber forming member in which a plurality of whistle chambers each having a slender groove are formed in parallel so as to correspond to each pitch lead, and a whistle chamber forming member that covers the whistle chamber. And a plate that is closely fixed. The whistle chamber is formed long in the direction orthogonal to the longitudinal direction of the whistle chamber forming member, and the air in each whistle chamber has a natural frequency determined by the length of the whistle chamber and the flow passage cross-sectional area. The length of the whistle chamber is set to be slightly longer than the length of the reed in order to allow a space for reed mounting in order to make the instrument width as small as possible. The reed is made of an elongated metal plate (stainless steel, brass plate, etc.) having a thickness of about 0.3 to 0.5 mm, and one end thereof is fixed to a slotted window formed on the plate corresponding to each whistle chamber. It is arranged as a unit and is vibrated by breathing in and out. Since the pitch (frequency) is determined by the length, thickness, etc. of the lead, the scale is formed by arranging the leads in order from the longest to the shortest. In addition, the blowing lead that blows and sounds is attached to the inside of the plate, and the suction lead that sucks and sounds is attached to the outside of the plate. The cover has the function of making it easier to hold the harmonica body during performance, the function of protecting the reeds, and the function of a resonator that expands the sound produced by the reeds, and is generally made of brass plate, stainless steel, or the like. . The volume and tone of the harmonica are determined by the material and shape of the reed (thickness change, bending, etc.), the material and shape of the plate (especially the window shape), and the configuration of these and the cover, and adjust the pitch. In this case, for example, when adjusting to a higher position, the tip of the lead is shaved slightly to reduce the weight of the tip,
On the contrary, when adjusting the pitch low, the root of the lead is shaved to weaken the elasticity.

[0003]

In the harmonica having such a structure, the air in each whistle chamber has a natural frequency determined by the length of the whistle chamber and the cross-sectional area of the flow passage as described above. Therefore, when the natural frequency and the frequency of the reed are close to each other, the reed and the air in the whistle chamber resonate and interfere with each other, which hinders the good vibration of the reed and causes poor sounding or volume. There was a problem that the timbre changed. In particular, when it comes to pronunciation, it sounds like a stuffy sound, and when it comes to timbre, it sounds muddy, and it is not possible to obtain the sound of the harmonica's original brightness and lightness.

Therefore, the present invention has been made in view of the above-mentioned conventional problems, and an object thereof is to make the air in the whistle chamber unique without changing the size as a musical instrument significantly. The purpose of the present invention is to provide a harmonica in which resonance is prevented by moving the frequency to a place where it does not affect the vibration of the reed, and the balance of sound generation, tone color, and volume is improved and improved.

[0005]

In order to achieve the above object, the invention according to claim 1 has a plurality of whistle chambers formed in parallel corresponding to each pitch, and In a harmonica equipped with a harmonica main body in which each pitch lead is arranged in the whistle chamber, and a cover for covering the harmonica main body, at least one whistle chamber is provided with a sub whistle chamber, and the inner part of the whistle chamber is provided. It is characterized by having a communication port with the auxiliary whistle chamber. A second aspect of the invention is characterized in that, in the first aspect of the invention, a sub-flute chamber is formed by providing a partition wall in the whistle chamber. A third aspect of the present invention is characterized in that, in the first or second aspect of the invention, the reed is arranged on the inner side of the auxiliary whistle chamber.

[0006]

In the invention according to claim 1, the whistle chamber length is increased by providing the sub whistle chamber communicating with the whistle chamber, the natural frequency of the air in the whistle chamber is lowered, and the natural frequency of the air in the whistle chamber is reduced. Move it to a place that does not affect the vibration of the reed. In the invention according to claim 2, by forming a sub-flute chamber by providing a partition wall in the whistle chamber, the natural frequency of the air in the whistle chamber is lowered without increasing the harmonica to affect the vibration of the reed. Move to a place where there is no. In the invention according to claim 3, the reed is arranged at the back side of the auxiliary whistle chamber,
Improves pronunciation and timbre. It is considered that this is because the convection balance of the air in the whistle chamber is improved because the length of the whistle chamber is increased.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the embodiments shown in the drawings. 1 is a front view showing an embodiment of a harmonica according to the present invention, FIG. 2 is an enlarged sectional view taken along the line II-II of FIG. 1, FIG. 3 is a plan view of a plate provided with leads, and FIG. 4 is an enlarged sectional view of an essential part. It is a figure. In these figures, this embodiment is applied to a single-tone harmonica in which one sound is produced by one lead. The harmonica generally indicated by reference numeral 1 is composed of a harmonica main body 2, a plurality of leads 3 having different lengths, and a cover 4 covering the harmonica main body 2. The harmonica main body 2 is formed integrally by injection molding, and a plurality of whistle chambers 5 (5-1 to 5-n) each having a slender groove corresponding to each pitch lead 3 are arranged in parallel with their outlets 5A aligned. And a plate 7 that covers the whistle chamber 5 of the whistle chamber forming member 6. The whistle chamber 5
The cross-sectional shape is substantially rectangular and is formed to be long in the direction orthogonal to the longitudinal direction of the whistle chamber forming member 6, and the length is set to become gradually shorter from the low tone side to the high tone side. The lead 3 is made of an elongated metal plate (stainless steel, brass plate, etc.) having a thickness of about 0.3 to 0.5 mm, and has a slotted window 8 formed on the plate 7 corresponding to each whistle chamber 5.
It has one end fixed to it. Lead 3 is
The low-pitched sound side has a long length, and the high-pitched sound side has a short length. Further, the blowing lead for blowing and ringing (FIG. 2) is attached to the inside of the plate 7, and the sucking lead for sucking and ringing (FIG. 4) is attached to the outside of the plate 7. The cover 4 is made of stainless steel, brass plate, resin, corrosion-resistant aluminum or the like, covers both sides of the harmonica main body 2, and has a sound emission hole 9 formed on the back surface.

In the harmonica 1 having such a structure, the air in the whistle chamber 5 has a natural frequency determined by its length and the flow passage cross-sectional area, and when the natural frequency and the frequency of the lead 3 are close to each other. The reed 3 and the air in the whistle chamber 5 resonate with each other and interfere with each other, hindering good vibration of the reed 3, deteriorating the sound, and changing the volume and timbre. Therefore, in the present invention, the whistle chamber that easily interferes with the vibration of the reed 3, for example, the whistle chamber 5 on the lowest tone side as shown in FIG.
The partition wall 11 is formed in -1 so as to be orthogonal to the lead 3 and substantially parallel to the longitudinal direction of the whistle chamber, thereby forming the sub whistle chamber 50a. As a result, the apparent whistle chamber length, that is, the whistle chamber length with respect to the flow path cross-sectional area, is increased to lower the natural vibration of the air in the whistle chamber 5-1. Is moved to a place without. In this way, the vibration of the air in the whistle chamber 5-1 does not interfere with the vibration of the reed 3, so that the pronunciation is not deteriorated and the volume and tone are not changed, and the balance of the tone, tone and volume is improved. Can be improved. Further, since the size of the whistle chamber 5-1 itself is not changed, the musical instrument itself does not become large.

FIG. 5 is a front view of a harmonica showing another embodiment of the present invention, and FIG. 6 is a view showing lead mounting positions with respect to the harmonica main body with the plate removed. In this embodiment, an auxiliary whistle chamber 50a is provided in parallel in the lowest sounding whistle chamber 5-1 which is likely to interfere with the vibration of the reed 3, and the auxiliary whistle chamber 50a is provided at the back of the whistle chamber 5-1.
The communication port 51 is provided, and the lead 3 is arranged at the innermost portion of the auxiliary whistle chamber 50a. Since the whistle chamber 5-1 is formed at the left end of the whistle chamber forming member 6, it is possible to form the blower port 5A in alignment with the blower ports 5A of the adjacent whistle chambers 5-2. In addition, the width of the whistle chamber forming member 6 (the size in the longitudinal direction of the whistle chamber 5) does not increase, and it is possible to prevent the harmonica from becoming large and heavy.

As described above, if the length of the whistle chamber is increased by installing the auxiliary whistle chamber 50a in the whistle chamber 5-1 which easily interferes with the vibration of the reed 3, the natural frequency of the air therein becomes low. Therefore, as in the above embodiment, the vibration of the air in the whistle chamber 5-1 and the vibration of the reed 3 do not interfere with each other, so that the pronunciation is not deteriorated and the volume and tone are not changed. The balance of the volume can be improved and improved. further,
Since the reed 3 is arranged on the inner side of the auxiliary whistle chamber 50a, it is possible to improve the sound and tone color. It is considered that this is because the convection balance of the air in the whistle chamber is improved because the length of the whistle chamber is increased.

In this case, instead of arranging the whistle chamber 5-1 and the sub whistle chamber 50a in a U-shape in plan view (or U-shape), they may be arranged in an L-shape in plan view as shown in FIG. The same effect as in the above embodiment can be obtained. However, if the lead 3 is arranged in the L-shape and the lead 3 is arranged in the sub whistle chamber 50a, the mounting direction of the lead 3 is different from the mounting direction of the other leads 3. Therefore, it is preferable to bend and form the U-shape. . Further, it is conceivable that the whistle chamber 5-1 which is likely to interfere with the vibration of the reed 3 is extended straight to increase its length, but in that case, the width of the musical instrument itself becomes long, resulting in an increase in size and weight. , Not realistic.

[0012]

As described above, the harmonica according to the invention described in claim 1 has a plurality of whistle chambers formed in parallel corresponding to each pitch and each whistle chamber. In a harmonica equipped with a harmonica body in which leads of each pitch are respectively arranged and a cover covering the harmonica body, at least one whistle chamber is provided with a sub whistle chamber, and a sub whistle chamber Since the communication port with the whistle chamber is provided, the whistle chamber length becomes longer, the natural frequency of the air in the whistle chamber can be lowered, and the natural frequency of the air in the whistle chamber can be moved to a place that does not affect the vibration of the reed. it can. Therefore, the vibration of the air in the whistle chamber does not interfere with the vibration of the reed, the sound is not deteriorated, and the volume and timbre are not changed, and the balance of the sound, timbre and volume can be improved and improved. Claim 2
In the invention according to claim 1, in the invention according to claim 1, since the auxiliary whistle chamber is formed by providing the partition wall in the whistle chamber, the natural frequency of the air in the whistle chamber is lowered without increasing the harmonica to lead the lead. It can be moved to a place that does not affect the vibration of. According to a third aspect of the invention, in the invention according to the first or second aspect, since the reed is arranged on the back side of the auxiliary whistle chamber, the convection balance of the air in the whistle chamber is improved, and the sound and tone are reproduced. Can be improved.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of a harmonica according to the present invention.

FIG. 2 is an enlarged sectional view taken along line II-II of FIG.

FIG. 3 is a plan view of a plate with leads.

FIG. 4 is an enlarged sectional view of an essential part.

FIG. 5 is a front view showing another embodiment of the present invention.

FIG. 6 is a view showing lead mounting positions with respect to the harmonica main body with the plate removed.

FIG. 7 is a view showing a lead mounting position with respect to a harmonica main body from which a plate is detached according to still another embodiment of the present invention.

[Explanation of symbols]

1 ... Harmonica, 2 ... Harmonica body, 3 ... Reed, 4
... cover, 5 ... whistle chamber, 6 ... whistle chamber forming member, 7 ... plate, 8 ... window, 9 ... sound emitting hole, 11 ... partition wall, 50a ... sub whistle chamber, 51 ... communication port.

Claims (3)

[Claims] 1. A harmonica main body having a plurality of whistle chambers formed in parallel corresponding to each pitch, and each whistle chamber being provided with a lead of each pitch. A harmonica having a cover for covering the main body of the harmonica, characterized in that at least one whistle chamber is provided with a sub whistle chamber, and a communication port with the sub whistle chamber is provided at the back of the whistle chamber. 2. The harmonica according to claim 1, wherein the auxiliary whistle chamber is formed by providing a partition wall in the whistle chamber. 3. The harmonica according to claim 1 or 2, wherein the reed is arranged on the back side of the auxiliary whistle chamber.