JP2007318702A - Speaker structure for stationary speaker, earphone, headphone and the like - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the problem wherein sound quality is changed/adjusted by adjusting generally an output side electric signal when adjusting the quality of sounds generated from an electroacoustic transducer (speaker unit) in the prior art, but it is difficult to naturally and precisely adjust the sound quality using the electric signal, and original characteristics of a speaker unit or a case are not effectively utilized. <P>SOLUTION: The present invention is characterized in that sound quality is changed not by using the electric signal, but by controlling air vibration generated from a diaphragm of the speaker unit. A sound path pipe that becomes a passage of sounds, therefore, is coupled in a part of the speaker unit case and a removable adjustment pipe produced on different conditions is built therein. The sound quality can also be controlled by exchanging screws (adjustment screws) opened in various hole sizes for varying the opening area of the sound path pipe. With such a method, a listener himself/herself can create sounds preferable for the listener by performing the exchange work by himself/herself, and natural and precise sound quality adjustment that can not be achieved by changing the sound quality using the electric signal, is made. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a structure for changing a reproduction area of a speaker such as a stationary speaker, an earphone, or a headphone.

  When adjusting or changing the sound quality generated from an electro-acoustic transducer (speaker unit), adjust the electrical signals such as the tone control and bus control on the amplifier side, or the equalizer device built in the audio equipment. It was playing the listener's favorite sound quality. However, it is difficult to make delicate adjustments that draw out the individuality of the electroacoustic transducer (speaker unit) body and the enclosure, which is the case, by adjustment using electric signals.

  If the listener cannot be satisfied with the sound quality change due to the electrical signals described above, other examples of methods include replacing the main body of the electroacoustic transducer (speaker unit) and various enclosures that wrap the electroacoustic transducer (speaker unit). The sound quality is changed by changing the material and form. However, it is physically difficult to replace the electroacoustic transducer (speaker unit) main body and to remake the enclosure and housing case in order to change the sound quality of the off-the-shelf stationary speakers, earphones, and headphones.

  In the adjustment of the electric signal, not only the natural sound quality cannot be reproduced, but there is a possibility that the original characteristics of the electroacoustic transducer (speaker unit) main body and the enclosure which is the case cannot be fully utilized. In addition, excessive voltage may be input to adjust the sound quality, which may distort the reproduced sound and deteriorate the sound quality. In the worst case, an electroacoustic transducer (speaker unit) may be installed. There are various problems such as damage.

  In addition, the replacement of the main body of the electroacoustic transducer (speaker unit) and the remodeling of the enclosure, which is the case of the electroacoustic transducer (speaker unit), into various materials has the disadvantage that a large-scale work must be performed. There is bad economic efficiency. In addition, there are some cases where it is physically difficult to replace the main body of the electroacoustic transducer (speaker unit) or the enclosure as the case. The difficult ones are off-the-shelf stationary speakers, earphones, and headphones described above.

  The present invention relates to an adjustment pipe that can be attached to and detached from the sound path pipe to change the characteristics of the air vibration generated from the diaphragm of the electroacoustic transducer (speaker unit), and that has different conditions of material and length. The size of the hole drilled in the screw to change the sound pipe opening area makes it possible for the listener to create a sound that the listener likes by exchanging screws for different adjustments. .

  Note that it is possible to reproduce a number of sound qualities by combining a plurality of adjustment screws and a plurality of adjustment pipes made under different conditions. In this system, the original characteristics of the electroacoustic transducer (speaker unit) can be utilized to the maximum, and the sound quality can be easily changed, rather than changing the sound quality with an electrical signal.

  Furthermore, with this invention, the adjustment pipe made by changing the conditions such as the warmth of the sound quality, hardness and softness, depth and thickness, presence and spread, as well as the variable frequency characteristics visible by the data table and graph table. The habits and features of each can be expressed by sound quality.

  These delicate expressions which are difficult to adjust with electric signals can be easily and easily changed by the listener.

  In addition, this makes it possible to change the sound quality of an off-the-shelf stationary speaker or the like while keeping the outer shape as it is. Especially, it is possible to change the sound quality without changing the feeling of wearing the earphones or headphones that are physically difficult to replace the body of the electroacoustic transducer (speaker unit) or the enclosure or housing case. .

  By exchanging multiple adjustment pipes and multiple adjustment screws made by changing the conditions of sound waves generated from the diaphragm of the electroacoustic transducer (speaker unit), it is possible to reproduce a variety of sound quality. It is.

  With this invention, the listener can reproduce his / her favorite sound at the resonance frequency, playback frequency, and sound quality at low cost without requiring large-scale work and without being caught by the electrical signal output from the music source or audio device. In addition to being able to reproduce, the required sound quality characteristics can be reproduced.

  Furthermore, with this invention, the adjustment pipe made by changing the conditions such as the warmth of the sound quality, hardness and softness, depth and thickness, presence and spread, as well as the variable frequency characteristics visible by the data table and graph table. Each habit and characteristic can be expressed by sound quality. These expressions, which are difficult to adjust by adjusting the electric signal, are characterized in that the listener can easily and easily change them.

  In addition, by making the parts such as the adjustment pipe, adjustment screw, and dedicated wrench independent, the listener can experience the joy of changing the sound quality by playing with their own hands like a large audio or home audio.

  Hereinafter, the structure of the speaker according to the present invention will be described with reference to the drawings.

  The feature of the present invention is that the resonance rate is different inside the sound path pipe, which is an acoustic tube in which an air chamber and the outside communicate with a part of a housing case for housing an electroacoustic transducer (speaker unit). It has a built-in adjustment pipe made under various conditions. And the sound quality can be changed by exchanging the adjustment pipe that becomes the resonance cavity and the resonance vagina. In addition, an adjustment screw having various sizes of duct holes (exhaust pressure ports) is provided in the sound path pipe opening. The acoustic characteristics can be changed by exchanging the adjusting screw. A combination of a plurality of adjusting screws and a plurality of adjusting pipes enables reproduction of various sound qualities.

  1 to 4, reference numeral 101 denotes the entire speaker. 1 is an electroacoustic transducer (speaker unit). A housing case 2 includes an air chamber 2a that encloses the electroacoustic transducer (speaker unit) and plays a role of collecting air vibrations generated from the diaphragm of the electroacoustic transducer (speaker unit). Reference numeral 3 denotes a sound pipe that serves as an acoustic tube in which the air chamber 2a communicates with the outside. 4 is an adjustment pipe built under various conditions inside the sound path pipe. Reference numeral 5 denotes an adjusting screw formed by a hollow screw provided with various large and small duct holes (exhaust pressure ports). 6 is a hexagon wrench for enamel screws used to attach and detach adjustment screws. 7 is a hole for an input wiring cord provided at a location different from the opening of the sound path pipe in order to resonate the air vibration generated from the diaphragm of the electroacoustic transducer (speaker unit) to the maximum with the adjustment pipe. . 8 is a cord bush made of high-tightness vinyl chloride to eliminate air / sound leakage from the hole for the input wiring cord to the outside and inside. 9 is an input wiring code. Reference numeral 10 denotes a cord stopper for collecting the input wiring cords taken out from the holes dedicated to the input wiring cords.

  The electroacoustic transducer (speaker unit) collects sound waves generated from the case that wraps the electroacoustic transducer (speaker unit) and the diaphragm of the electroacoustic transducer (speaker unit), and has an air chamber inside. A housing case provided is formed.

  The sound path pipe 3 is a cylindrical pipe, one end 3a of which is connected to a part of the housing case to communicate with the air chamber 2a of the housing case, and the adjustment screw 5 can be attached / removed to the other end 3b. In this way, a tap screw is cut into the inner peripheral wall surface. The other end 3b is an opening of the sound path pipe.

  Next, the inner diameter of the sound path pipe 3 is larger than the outer diameter of the adjustment pipe 4 so that the adjustment pipe 4 can be inserted into the cylindrical sound path pipe 3. Further, the outer diameter of the adjusting pipe 4 should not be larger than this.

  As shown in FIG. 5, a plurality of adjustment pipes 4 having different materials, masses, densities, differences in length, inner diameter, material thickness, and the like, and having different resonance rates of the adjustment pipes serving as resonance cavities are produced.

  By changing and using these adjustment pipes with different conditions in the sound pipe, the acoustic characteristics reproduced from the electroacoustic transducer (speaker unit) can be varied.

  It should be noted that the shape inside the sound path pipe must match the shape of the adjustment pipe such as length and thickness so that the adjustment pipe can be inserted.

  Next, an adjustment screw 5 is used for the opening 3b of the cylindrical sound path pipe 3, and a tapping screw is cut into the inner peripheral wall surface so that attachment / detachment is possible using a wrench 6. . As shown in FIG. 6, the adjustment screw 5 is provided with various sizes of duct holes (exhaust pressure ports).

  Adjusting the rate at which the air vibration generated from the diaphragm of the electroacoustic transducer (speaker unit) resonates with the adjustment pipe that forms the resonance vagina is provided with various small and large duct holes (exhaust pressure ports) The acoustic characteristics can be changed by replacing the screws.

  Next, increase the area of the inner wall surface of the adjustment pipe and adjustment screw, which is an invention for making the acoustic characteristics variable, and maximize the air vibration generated from the diaphragm of the electroacoustic transducer (speaker unit). In order to resonate with the adjustment pipe, it is desirable to provide a wiring cord outlet at a location different from the opening outlet of the sound path pipe. Therefore, in order to avoid sound quality interference of the input wiring cord, the wiring cord outlet is provided at a location different from the opening outlet of the sound path pipe.

  Air vibration generated from the diaphragm of the electroacoustic transducer (speaker unit) passes through the housing case with the air chamber and is discharged to the outside through the sound path pipe that becomes an acoustic tube combined with a part of the housing case. The At this time, a removable adjustment pipe is built in the sound path pipe. This adjustment pipe is made of pipes with different conditions such as material and length, and is detachable. Air vibrations generated from the diaphragm of the electroacoustic transducer (speaker unit) are transmitted to the adjustment pipe, and each adjustment pipe with different conditions resonates with the sound quality of the respective material, and the adjustment pipe resonates. It becomes a cavity and is changed to the timbre of each condition and is transmitted to the listener's ear. Further, the adjustment pipe is locked by an adjustment screw provided at the opening of the sound path pipe serving as the acoustic pipe.

  The adjustment screw is provided with various sizes of duct holes (exhaust pressure ports) of different sizes in order to change the opening area of the opening. By exchanging them, opening and closing means for the duct holes (exhaust pressure ports) To do. Thereby, the acoustic characteristics can be varied.

  An embodiment of the present invention will be described with reference to FIG.

  The graph shown in FIG. 7 shows the respective frequencies reproduced by exchanging the adjusting pipe and the adjusting screw. A graph 201 is a frequency characteristic reproduced by a combination of a copper adjustment pipe and a duct hole diameter / large, and 201a is an example of the combination. A graph 202 is a frequency characteristic reproduced from a combination of an aluminum adjusting pipe and a duct hole diameter / large, and 202a is an example of the combination. A graph 203 is a frequency characteristic reproduced from a combination of a stainless adjustment pipe and a duct hole diameter / large, and 203a is an example of the combination.

  Despite using the same electroacoustic transducer (speaker unit), the sound quality can be changed by replacing the adjusting pipe and adjusting screw under different conditions. In addition to the variable frequency characteristics visible in the data table and graph table, each adjustment pipe made with different conditions such as warmth / stiffness / softness / depth / thickness / realism / expansion of sound quality You can hear the habit and the difference in characteristics as a change in sound quality. Further, the selection of the adjusting screw having a different diameter of the duct hole makes the sound quality more variable when the adjusting pipe is replaced.

  Sectional drawing of the inner earphone which shows embodiment of this invention   Cross-sectional view of the same earplug type earphone   Sectional view of other stationary speakers   Sectional view of other stationary speakers   Example of adjustment pipe   Example of adjustment screw   Example of frequency characteristics that can be changed by changing the adjustment pipe and adjustment screw   Selection diagram

Explanation of symbols

Description of reference numerals in FIGS. 1 to 4 and 8 below 1 Electroacoustic transducer (speaker unit)
DESCRIPTION OF SYMBOLS 1a Diaphragm 2 Housing case 2a Air chamber 3 Sound path pipe 3a 2 Connection part 3b of housing case and 3 sound path pipe 3 Opening part (other end) where tap screw is cut in inner wall surface of 3 sound path pipe
4 Adjustment pipes (copper, stainless steel, aluminum, brass, Teflon, carbon, wood, paper, plastics, cloths, sponges, glass, ceramics, etc. may exist on the earth that can be molded into a pipe shape) Various materials)
5 Adjustment Screw 6 5 Adjustment Screw, Mounting / Removal Wrench 7 Input Wiring Cord Exit Dedicated Hole 8 Cord Bush 9 Input Wiring Cord 10 Cord Fastening 101 Overall Description of Speaker 4a Explanation of Symbols in FIG. : Copper 4b Adjustment pipe material example 2: Aluminum 4c Adjustment pipe material example 3: Stainless steel 4d Adjustment pipe material example 4: Brass 4e Adjustment pipe material example 5: Teflon 4f Adjustment pipe material example 6: Carbon 4g For adjustment Pipe material example 7: Long total length 4h Adjustment pipe material example 8: Short total length 4i Adjustment pipe material example 9: Thick inner diameter 4j Adjustment pipe material example 10: Thin inner diameter 4k Adjustment pipe material example 11: Meat Thick 4l adjustment pipe material example 12: wall thickness is thin The following explanation of reference numerals in FIG. 6a adjustment screw duct hole diameter example 1: Adjustable screw duct hole diameter Example 2: Duct hole diameter / medium 5c Adjustable screw duct hole diameter example 3: Duct hole diameter / small Explanation of reference numerals in FIG. 7 201 Copper adjustment pipe and duct hole diameter Example of frequency characteristic graph reproduced with combination of large adjustment screw 202 Example of frequency characteristic graph reproduced with combination of aluminum adjustment pipe and duct hole diameter / large adjustment screw 203 Stainless steel adjustment pipe Characteristic graph table 201a reproduced with a combination of a screw for adjusting the diameter of a duct hole and a large diameter, and a combination example 202a of a pipe for adjusting copper and a diameter of a large hole for adjusting a duct 202a. -Combination example of large adjustment screw 203a Combination example of stainless adjustment pipe and duct hole diameter-Large adjustment screw

Claims (6)

  The present invention is characterized in that a sound path pipe serving as an acoustic tube in which an air chamber communicates with the outside is formed in a part of a housing case for accommodating an electroacoustic transducer (speaker unit).   An adjustment pipe having an outer diameter smaller than the inner diameter of the sound path pipe is built in the sound path pipe. This adjustment pipe is detachable with respect to the conduit inside the sound path pipe to be an acoustic tube, and can be changed.   In the adjustment pipe built in the sound pipe serving as the acoustic tube, air vibration generated from the diaphragm of the electroacoustic transducer (speaker unit) is transmitted to the adjustment pipe and resonates. The adjustment pipe becomes a resonance cavity, and the timbre is changed. The adjustment pipes are made of various materials having different resonance ratios such as copper, brass, and stainless steel, so that the acoustic characteristics can be changed by exchanging them. In addition to the difference in material, the difference in sound quality due to the adjustment pipe is due to the change in sound quality due to the difference in conditions such as the mass, density, length, inner diameter / outer shape, and thickness of each material.   The adjustment pipe is characterized in that the adjustment screw provided in the opening of the sound path pipe can be changed by attaching and detaching it using a dedicated tool.   The adjustment screw provided in the above-mentioned sound path opening is provided with various sizes of duct holes (exhaust pressure ports) of different sizes in order to change the opening area of the opening. Opening and closing means for the hole (exhaust pressure port). The acoustic characteristics can be varied by controlling the air vibration and the rate of resonance with the adjustment pipe serving as the resonance vagina by opening and closing means of the duct hole (exhaust pressure port).   When pulling out the wiring cord connected to the electroacoustic transducer (speaker unit) from the housing case, the air vibration generated from the diaphragm of the electroacoustic transducer (speaker unit) is maximally resonated with the adjustment pipe. For this purpose, a wiring cord outlet is provided at a location different from the outlet of the sound path pipe.

Images