JP3201338U - speaker - Google Patents

Abstract

Provided is a speaker that reduces the occurrence of standing waves and the leakage of reflected sound by devising the shape of the enclosure as an enclosure. A speaker main body is mounted outward in an axial direction at both ends in an axial direction of a casing as an enclosure formed of an arcuate cylindrical body. By providing the pedestal 11 in the housing 10, it is possible to place the speaker in an upright position or a lying position. An opening 14 through which air flows is provided in the wall portion of the housing 10. The speaker body 30 is accommodated in induction ducts 51 and 61 as inner cases, and outlets 52 and 62 are provided in the induction ducts 51 and 61 so as to be streamlined. Turn. [Selection] Figure 10

Description

  The present invention relates to a loudspeaker, and more particularly to a loudspeaker provided with a countermeasure for reducing back pressure pulsation caused by vibration of a diaphragm of a loudspeaker body to generate a standing wave (standing wave) inside an enclosure.

  11 is a schematic perspective view of a conventional speaker, and FIG. 12 is a schematic longitudinal sectional side view of the speaker of FIG. The speaker shown in FIGS. 11 and 12 is a stereo type, and dynamic type speaker main bodies 30 and 30 are respectively attached to two left and right speaker attachment ports 20 and 20 of a casing 10 formed of a hollow hexahedron as a sealed enclosure. ing.

  This type of speaker has a structure in which the sound emitted from the back surface of the diaphragm of the speaker body 30 is sealed by sealing the back of the speaker body 30 with an enclosure. For this reason, the housing 10 exhibits a function of preventing the sound that exits from the back of the speaker body 30 from entering the housing interior space S from interfering with the sound that exits from the front surface of the speaker body 30 to the outside of the housing.

  However, since the front panel and the rear panel of the housing 10 and the left and right side panels face each other and each panel is flat, a sound that is emitted from the back of the speaker body 30 into the housing space S is generated. The sound reflected from each of the above panels is combined to generate a standing wave (standing wave) as exemplified by the arrows that adversely affect the sound quality of the speaker, or the reflected sound in the mid-high range is It is said that there is a problem of leaking outside. Standing waves (standing waves) are created by overlapping two waves with the same wavelength, period, amplitude, etc., and traveling directions opposite to each other. It is the wave motion that can be seen.

  On the other hand, in Patent Document 1 as a prior example, the interior of a hollow hexahedron cabinet (corresponding to an enclosure) is divided into a first space and a second space by a partition member, and a front panel of the first space is dynamically formed. There is disclosed a speaker system in which a type of speaker means (corresponding to a speaker main body) is provided, a drone cone is provided in a partition member, and a port tube is provided in a front panel of a second space. In this speaker system, the port tube exhibits the effect of resonance-enhancing the low-frequency sound emitted to the back of the speaker body on the principle of Hertzholm resonance and releasing it to the outside of the housing.

  As can be seen from the speaker system disclosed in Patent Document 1, a known well-known speaker has a hollow hexahedron as its enclosure, so that a standing wave (standing wave) is generated as described above. And there is a problem that the reflected sound in the middle and high range leaks out of the casing. Therefore, as a measure for reducing the occurrence of standing waves and the sound leakage of reflected sound, a measure of mounting a sound absorbing material (silencer) inside the casing has been taken.

Japanese Utility Model Publication No. 3-51598

  The present invention has been made in view of the above situation, and an object thereof is to reduce the occurrence of standing waves and the leakage of reflected sound by devising the shape of a casing as an enclosure. Another object of the present invention is to further reduce the occurrence of standing waves and the leakage of reflected sound by adding a certain measure to the devised housing shape.

  The speaker according to the present invention is a speaker in which a dynamic speaker body is accommodated in an enclosure, and the speaker body is provided at each of both ends in the axial direction of the casing as the enclosure formed of an arcuate cylindrical body. Is mounted outward in the axial direction.

  According to the speaker configured in this way, the enclosure as an enclosure is configured by an arc-shaped cylinder, so that the interior of the cylindrical enclosure is configured by a curved surface, and the opposing wall surfaces are also opposed by curved surfaces. Because it is difficult to synthesize the sound even if the sound coming out from the back of the speaker body into the housing space is reflected, this not only helps to suppress the generation of standing waves, but it also increases the mid-high sound. The reflection sound of the area is also less likely to occur.

  In the present invention, on the outside of the housing, the speaker is mounted in a first seating surface that allows the speaker body to be placed in an upright position with the speaker body facing upward, and a recumbent posture in which the speaker body is lateral. It is desirable to provide a second seating surface that allows the user to place the second seating surface. With this configuration, the orientation of the speaker body can be changed according to the preference of the speaker user, and the sound audible to the user can be changed depending on the posture of the speaker.

  In the present invention, it is possible to adopt a configuration in which a partition plate that divides the internal space of the casing into two independent left and right first and second spaces is provided at the central portion in the axial direction of the casing. Is possible. According to this structure, the speaker main body equipped in each of the both ends in the axial direction of the casing as an enclosure formed of an arcuate cylindrical body is provided inside each of the independent first and second spaces. Since it is located, it becomes difficult to produce the situation where the sound which came out from the back part of both speaker bodies interferes, and a sound quality falls.

  In the present invention, it is desirable that the wall portion of the housing is provided with an opening that allows the internal space of the housing to communicate with the outside of the housing so as to allow air flow. With this configuration, the opening exerts the action of the port pipe shown in Patent Document 1 above. For this reason, the low frequency sound emitted to the back of the speaker main body by the principle of Hertzholm resonance is enhanced and emitted to the outside of the housing.

  In the present invention, the opening is provided in the axially central portion of the wall portion of the housing, and the internal space of the housing is provided on each of both sides in the axial direction across the formation portion of the opening. A pair of partition plates are provided to partition the left and right two independent first and second spaces and a third space that faces between the two spaces and faces the opening. A first airflow hole that communicates the first and third spaces with each other is provided, and a second airflow hole that communicates the second and third spaces with each other is provided on the other partition plate. It is possible to adopt the configuration of Also with this configuration, it is difficult to cause a situation in which sounds coming out from the back portions of both speaker bodies interfere with each other and deteriorate the sound quality.

  In the present invention, the speaker main body mounted on each of both ends in the axial direction of the casing is accommodated in an induction duct as an inner case attached to the casing, and the induction duct is streamlined. It is desirable to employ a configuration in which the outlet is narrowed in shape and the outlet is directed to the location where the opening is formed. According to this configuration, it is difficult for the sound emitted from the backs of both speaker bodies to interfere with each other and deteriorate the sound quality, and the sound emitted from the backs of the speakers is restricted to the streamline shape of the induction duct. When exiting from the exit, the sound from the exit is difficult to return to the inside of the induction duct. Therefore, it is useful for suppressing the deterioration of the sound quality of the speaker body due to the sound coming out from the outlet returning to the inside of the induction duct. Moreover, since all the inner walls of the induction duct are composed of curved surfaces, it is useful for suppressing the generation of standing waves.

  In the present invention, it is desirable that a sound absorbing material is loaded in a predetermined region of the internal space of the casing facing the opening. By adopting this configuration, generation of standing waves and sound leakage of reflected sounds are further reduced.

  As described above, according to the speaker of the present invention, the effect of reducing the generation of standing waves and the leakage of reflected sound can be achieved depending on the shape of the casing as the enclosure.

It is the perspective view which showed the speaker which concerns on 1st Embodiment of this invention. It is explanatory drawing of the state which mounted the speaker of FIG. 1 in the standing posture. It is explanatory drawing of the state which mounted the speaker of FIG. 1 in the lying position. It is a vertical front view of the speaker of FIG. It is the vertical front view which showed the speaker which concerns on 2nd Embodiment of this invention. It is a vertical side view of the speaker of FIG. It is the vertical side view which showed the principal part of the modification. It is a vertical front view of the speaker which concerns on 3rd Embodiment of this invention. It is a vertical front view of the speaker which concerns on 4th Embodiment of this invention. It is a vertical front view of the speaker which concerns on 5th Embodiment of this invention. It is a schematic perspective view of the speaker by a prior art example. It is a schematic longitudinal side view of the speaker of FIG.

  FIG. 1 is a perspective view showing a speaker according to a first embodiment of the present invention, FIG. 2 is an explanatory diagram of a state in which the speaker of FIG. 1 is placed in a standing posture, and FIG. 3 is a diagram in which the speaker of FIG. FIG. 4 is a longitudinal front view of the speaker of FIG.

  As shown in FIG. 1 or FIG. 4, the speaker according to this embodiment is a stereotype including a pair of dynamic-type speaker bodies 30, 30, and both end portions in the axial direction of the housing 10 as an enclosure. The speaker main bodies 30 are mounted outward in the axial direction. The housing | casing 10 consists of a circular-arc-shaped cylinder. In addition, a pedestal 11 is provided outside the central portion of the housing 10 in the axial direction. As shown in FIGS. 2 and 3, the pedestal portion 11 has first and second seating surfaces 12 and 13 that are orthogonal to each other. Then, when the speaker is placed on a fixed surface (not shown) such as a floor surface or a table surface using the first seating surface 12, the speaker stands up and the speaker body 30 faces upward as shown in FIG. . When the second seating surface 13 is used and placed on the fixed surface (not shown), the speaker is in a recumbent posture and the speaker body 30 is turned sideways as shown in FIG. Therefore, the direction of the speaker body 30 can be changed according to the user's preference, and the sound that can be heard by the user can be changed depending on the posture of the speaker.

  According to the speaker configured as described above, the sound emitted from the speaker body 30 toward the front side is emitted to the outside of the housing 10 through the end opening of the housing 10. On the other hand, the sound that the diaphragm of the speaker main body 30 vibrates and comes out in the inner space S behind it collides with or reflects the inner surface of the housing 10 as exemplified by the arrows in FIG. In this case, since the housing 10 is curved in an arc shape in the axial direction, most of the sound that collides with or reflects the inner surface of the housing 10 collides with the curved surface of the inner surface of the housing 10 and diffuses. And will be reflected. Therefore, a phenomenon in which sound that collides or reflects on the inner surface of the housing 10 is synthesized is less likely to be generated, generation of a standing wave is suppressed, and reflected sound in the middle and high range is less likely to be generated. As a result, according to the speaker of this embodiment, the generation of stationary waves and the leakage of reflected sound are reduced only by the fact that the casing 10 as the enclosure is configured by an arcuate cylindrical body. It becomes possible to provide a good speaker. Although not shown in the drawings, such a standing wave suppressing action and reflected sound suppressing action are more remarkably exhibited by loading the casing 10 with a sound absorbing material (silencer) made of a fibrous material or the like.

  FIG. 5 is a longitudinal front view showing a speaker according to a second embodiment of the present invention, FIG. 6 is a longitudinal side view of the speaker of FIG. 5, and FIG. 7 is a longitudinal side view showing an essential part of a modification. This embodiment corresponds to the speaker of the first embodiment described above in which the opening 14 is provided in the wall portion of the housing 10. The opening 14 exhibits a function of allowing the air to flow by communicating the internal space of the housing 10 and the outside of the housing 10.

  According to the loudspeaker of this embodiment, the opening 14 exerts an effect of enhancing resonance of the low-frequency sound emitted to the back part of the speaker body 30 on the principle of Hertzholm resonance and releasing it to the outside of the housing 10. Therefore, the standing wave suppressing action and the reflected sound suppressing action exerted by the speaker of the first embodiment synergistically with the action of resonantly enhancing the low-frequency sound by the opening 14 and releasing it to the outside of the housing, the speaker The sound quality will be further improved. Also in the speaker of the second embodiment, the sound wave absorbing material (silencer material) made of a fibrous material or the like is loaded in the housing 10 so that the standing wave suppressing effect and the reflected sound suppressing effect are more remarkably exhibited. It becomes like this. In particular, in the second embodiment, the opening 14 is provided in the axially central portion of the wall portion of the housing 10. Therefore, the reverse-phase sound that is emitted from each of the pair of left and right speaker bodies 30, 30 to the back thereof is released to the outside in a balanced manner as indicated by arrows in FIG. Thereby, the standing wave suppressing action and the reflected sound suppressing action are easily exhibited. In the second embodiment, it is needless to say that the opening 14 may be formed by a port pipe as shown in FIG.

  FIG. 8 is a longitudinal front view of a speaker according to a third embodiment of the present invention. In this embodiment, a partition plate 15 is provided in an axially central portion of a casing 10 formed of an arcuate cylindrical body, and the partition plate 15 causes the inner space of the casing 10 to be divided into two independent first and It is partitioned into second spaces S1, S2. And the opening parts 14 and 14 which face each 1st and 2nd space S1, S2 are provided in the location near the partition plate 15 in the wall part of the housing | casing 1, respectively. In this embodiment, the opening 14 facing each of the first and second spaces S1, S2 has a function of allowing the air to flow by communicating the spaces S1, S2 and the outside of the housing 10. Demonstrate.

  According to the speaker of this embodiment, the partition plate 15 exhibits the effect of preventing interference of reverse-phase sounds that are individually generated in the first space S1 and the second space S2. In addition, the openings 14 and 14 exhibit the effect of resonance-enhancing the low-frequency sound emitted to the back portions of the left and right speaker bodies 30 and 30 on the principle of Hertzholm resonance and releasing them to the outside of the housing 10. Therefore, the above-described standing wave suppressing action and reflected sound suppressing action are synergistic with the action of resonance enhancement of the low-frequency sound by the opening 14 and releasing it to the outside of the housing, thereby further improving the sound quality of the speaker. . Also for the speaker of this embodiment, the sound wave absorbing material (silencer material) made of a fibrous material or the like is loaded in the housing 10 so that the standing wave suppressing effect and the reflected sound suppressing effect can be exhibited more remarkably. Become. Also in this embodiment, the opening 14 may be formed by a port pipe.

  FIG. 9 is a longitudinal front view of a speaker according to a fourth embodiment of the present invention. In this embodiment, an opening 14 is provided in the central portion in the axial direction of the wall portion of the casing 10 formed of an arcuate cylindrical body. In addition, the internal space of the housing 10 is divided into two left and right independent first and second spaces S1 and S2 on both sides in the axial direction of the housing 10 with the opening 14 formed therebetween. A pair of partition plates 16 and 17 are provided which are positioned between S1 and S2 and partition into a third space S3 facing the opening 14. The first partition plate 16 is provided with a first air flow hole 18 for communicating the first and third spaces S1 and S3 with each other, and the second partition plate 17 is provided with the second and third spaces S2. , S3 are provided with second airflow holes 19 that communicate with each other. In this embodiment, the opening 14 facing the third space S3 exhibits a function of allowing the third space S3 and the outside of the housing 10 to communicate with each other to allow air flow.

  According to the speaker of this embodiment, the pair of partition plates 16 and 17 exerts an effect of preventing interference of reverse-phase sounds that are individually generated in the first space S1 and the second space S2. In addition, the above-described standing wave suppressing action and reflected sound suppressing action synergize with the action of resonance enhancement of the low-frequency sound by the opening 14 and releasing it to the outside of the housing, thereby further improving the sound quality of the speaker. . As for the speaker of this embodiment, the sound absorbing material (silencer) made of a fibrous material or the like is loaded in the third space S3, so that the standing wave suppressing effect and the reflected sound suppressing effect can be exhibited more remarkably. become. Also in this embodiment, the opening 14 may be formed by a port pipe.

  FIG. 10 is a longitudinal front view of a speaker according to a fifth embodiment of the present invention. In this embodiment, the opening part 14 is provided in the axial direction center part of the wall part of the housing | casing 10 which consists of an arc-shaped cylinder similarly to the structure shown in FIG. The opening 14 exhibits a function of allowing the air to flow by communicating the internal space S of the housing 10 with the outside of the housing 10. Therefore, the opening 14 exerts an effect of enhancing resonance of the low-frequency sound emitted to the back portion of the speaker body 30 on the principle of Hertzholm resonance and releasing it to the outside of the housing. Therefore, the above-described standing wave suppressing action and reflected sound suppressing action are synergistic with the action of resonance enhancement of the low-frequency sound by the opening 14 and releasing it to the outside of the housing, thereby further improving the sound quality of the speaker. .

  In the speaker of this embodiment, a sound absorbing material 40 made of a fibrous material or the like is loaded in a predetermined area of the internal space S of the housing 10 facing the opening 14, and the sound absorbing material 40 allows the standing wave suppression action and reflected sound to be heard. The inhibitory action is more pronounced. In the fifth embodiment, since the opening portion 14 is provided in the axial center of the wall portion of the housing 10, the opposite phase sound that is emitted from the pair of left and right speaker bodies 30, 30 to the back portion thereof. However, it comes to escape to the outside in a well-balanced manner, and the standing wave suppressing action and the reflected sound suppressing action are easily exhibited. Also in this embodiment, the opening 14 may be formed by a port pipe.

  In particular, in this embodiment, the speaker main bodies 30 and 30 that are respectively provided at both ends in the axial direction of the casing 10 are accommodated in induction ducts 51 and 61 as inner cases attached to the casing 10. The guide ducts 51 and 61 have outlets 52 and 62 that are narrowed in a streamline shape, and the outlets 52 and 62 are directed to the position where the opening 14 is formed. By adopting this configuration, it is difficult to cause a situation in which sounds emitted from the back portions of the left and right speaker main bodies 30 and 30 interfere with each other and deteriorate the sound quality, and the sound emitted from the outlets 52 and 62 thereof. Becomes difficult to return to the inside of the induction ducts 51 and 61. Therefore, the sound quality of the speaker main bodies 30 and 30 due to the sound output from the outlets 52 and 62 returning to the inside of the induction ducts 51 and 61 is suppressed. Further, since the inner walls of the induction ducts 51 and 61 are all formed of curved surfaces, it is useful for suppressing the generation of standing waves.

  1 to 12, the same or corresponding elements are denoted by the same reference numerals to facilitate the understanding of the configuration and avoid duplication of description.

DESCRIPTION OF SYMBOLS 10 Housing | casing 12 1st seating surface 13 2nd seating surface 14 Opening part 15 Partition plate 16,17 Partition plate 18 1st through-hole 19 2nd through-hole 30 Speaker main body 51,61 Guidance duct 52,62 Outlet 40 Sound absorption material S Internal space of the housing S1 First space S2 Second space S3 Third space

Claims (7)

A speaker in which a dynamic speaker body is housed in an enclosure,
A speaker, wherein the speaker main body is provided outward in the axial direction at each of both ends in the axial direction of the casing as the enclosure formed of an arcuate cylindrical body.   A first seating surface that enables the speaker to be placed in an upright position with the speaker body facing upward and a recumbent posture with the speaker body facing sideways on the outside of the housing; The speaker according to claim 1, wherein a second seating surface is provided.   The speaker according to claim 1 or 2, wherein a partition plate that divides the internal space of the housing into two independent first and second spaces on the left and right sides is provided at an axially central portion of the housing.   The opening part which enables the internal space of a housing | casing and the exterior of a housing | casing to be connected, and enables an air flow is provided in the wall part of the said housing | casing. speaker.   The opening is provided in the axial center of the wall of the casing, and the inner space of the casing is separated into two independent left and right sides on both sides in the axial direction across the portion where the opening is formed. A pair of partition plates are provided for partitioning between the first and second spaces and the third space located between the two spaces and facing the opening, and the first and second partitions are provided on one side partition plate. 3. A first airflow hole communicating with the third space is provided, and a second airflow hole communicating with the second and third spaces is provided in the other partition plate. 4. The speaker described in 4.   The speaker main body mounted on each of both ends in the axial direction of the casing is accommodated in a guide duct as an inner case attached to the casing, and the guide duct is narrowed to a streamline shape. The speaker according to claim 4, wherein the speaker has an outlet, and the outlet faces a place where the opening is formed.   The speaker according to any one of claims 4 to 6, wherein a sound absorbing material is loaded in a predetermined region of the internal space of the housing facing the opening.

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