JP2006173989A - Speaker apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a speaker apparatus which can be installed that the surface of a wall reflection can be prevented simply. <P>SOLUTION: Warpages 22 and 24 which bend outside from this front, respectively are formed in the front of baffle plates 12 and 14 combined behind so that the angle of about 90° might be made in the state of erection, and baffle plates 12 and 14 are equipped with a speaker 16 so that it may radiate sound ahead from a speaker hole provided in the bond of the bubble plates 12 and 14. Liners 18 and 20 back estranged and arranged mostly from the baffle plates 12 and 14 to parallel, respectively are combined behind so that the angle of about 90° may be made in the state of erection, and the baffle plates 12 and 14 are combined with the front part of linears 18 and 20 through the warpages 22 and 24, respectively. Cover plates which block the aperture of the upper part of a configured tubular body and the lower part with the baffle plates 12 and 14, baffle plate bond parts, liners 18 and 20 and the warpages 22 and 24, respectively is prepared, and a configuration in which sealing in space arrangement of the speaker 16 is performed. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a speaker device suitable for use in a corner of a room.

Conventionally, as a speaker device, a speaker device in which a speaker 2 is housed in a sealed cabinet 3 as shown in FIG. Further, as a speaker device that reduces the influence of sound reflection from the ceiling or floor of a room, a line array type speaker device in which a plurality of speakers are arranged in a vertical direction to form a linear sound source is known (for example, non-patent document). 1).
Stage Sound Journal 2001, 8, pp. 4-10

  As shown in FIG. 14, when the speaker device 1 is arranged in the vicinity of the walls 4 and 5 in the room, the frequency characteristics at the listening point (or observation point) P are disturbed by sound reflection from the wall 4. The frequency at which the dip appears in the frequency characteristic is expressed by the following equation (1).

  Here, c is the speed of sound (340 [m / sec]), and n is 0, 1, 2, 3,. a is the distance between the center of the speaker 2 and the reflection point of the wall 4, b is the distance between the reflection point of the wall 4 and the listening point P, and d is the distance between the center of the speaker and the listening point P. is there. (A + b−d) is a path length difference [m], and a dip appears at a frequency at which this distance becomes a half wavelength and an odd multiple thereof. The frequency characteristic at this time is the same as that of a so-called comb-tooth filter, and is generally expressed as shown in FIG. 15, f1 represents a frequency at which the path length difference becomes a half wavelength, and f3, f5, f7,... Represent frequencies that are odd multiples of f1.

  The frequency characteristics are also disturbed by sound reflection from the wall 5 in the same manner as described above for the wall 4. The frequency at which the dip appears in the frequency characteristic is expressed by the following equation (2).

  Here, m is 0, 1, 2, 3,. a ′ is the distance between the center of the speaker 2 and the reflection point of the wall 5, and b ′ is the distance between the reflection point of the wall 5 and the listening point P. The frequency characteristics at this time are generally expressed as shown in FIG. In FIG. 16, f1 'represents a frequency at which the path length difference (a' + b'-d) is a half wavelength, and f3 ', f5', f7 ', ... represent frequencies that are odd multiples of f1'.

  The frequency characteristic based on the sound reflection of the two walls 4 and 5 is a combination of the frequency characteristics of FIGS. 15 and 16 and is as shown in FIG. If the frequency characteristic at the listening point P is disturbed as shown in FIG. 17, even if the frequency characteristic of the speaker 2 is flattened, it becomes meaningless. In other words, if a speaker that is not affected by sound reflection from the wall can be realized, the frequency characteristic at the listening point P becomes a frequency characteristic with good flatness inherent to the speaker, and a faithful reproduced sound may be obtained.

  The influence of sound reflection from the wall as described above is caused when the speaker devices 1A and 1B similar to the speaker device 1 are arranged at mirror image positions when the walls 4 and 5 are regarded as mirrors as shown in FIG. Can be understood as a situation where the sound from the speaker device 1 interferes with the sound from the speaker devices 1A and 1B. One mirror image speaker creates another mirror image with another mirror, but is omitted here for the sake of simplicity.

  FIG. 19 shows an example in which the speaker device 1 is embedded at a ridge line position (corner) where the walls 4 and 5 intersect. When the speaker device is embedded in the corner of the room in this way, there is no sound incident on the wall surface, or the mirror image is superimposed on the speaker itself, so no sound reflection from the wall occurs, and the listening point as described above. The frequency characteristics are not disturbed.

However, in the speaker arrangement example of FIG. 19, it is necessary to perform a large-scale construction for installing the speaker in a ready-made room, and there is a problem that installation is not easy in terms of work and cost.
An object of the present invention is to provide a novel speaker device that can prevent wall surface reflection and can be easily installed.

A first speaker device according to the present invention includes:
First and second baffle plates whose rear portions are coupled so as to form an angle of approximately 90 ° in an upright state, the front portions of the first and second baffle plates being respectively outward from the front portion. First and second warped portions that warp, and a joint portion that joins the first and second baffle plates is provided with a speaker hole;
A speaker mounted on the first and second baffle plates so as to emit sound from the speaker hole to the side forming the 90 ° angle of the first and second baffle plates;
The first and second back plates are arranged substantially parallel and spaced rearward from the first and second baffle plates, respectively, and the rear portions are at an angle of approximately 90 ° in the upright state. The first and second baffle plates are coupled to the front portions of the first and second back plates through the first and second warped portions, respectively. When,
The upper and lower openings of the cylindrical body constituted by the first and second baffle plates, the coupling portion, the first and second back plates, and the first and second warped portions are respectively closed. The first and second cover plates are provided, and the speaker is arranged in a sealed space formed by the cylindrical body and the first and second cover plates.

  According to the first speaker device, the sealed cabinet that houses the speaker is constituted by the cylindrical body and the first and second cover plates. Since the first and second back plates are joined so as to form an angle of 90 °, the rear portion of the cylindrical body has a right cross section. For this reason, the first speaker device can be easily installed in the room such that the corner of the rear part of the cylindrical body (the rear part of the cabinet) is arranged at a corner that forms a right angle of the room. In such an installation state, sound radiated from the speaker is guided along the left and right walls of the room on the side forming the 90 ° angle of the first and second baffle plates. Therefore, sound reflection from the wall does not occur, and the original frequency characteristics of the speaker can be obtained at the listening point.

A second speaker device according to the present invention is:
First and second baffle plates whose rear portions are coupled so as to form an angle of approximately 90 ° in an upright state, the front portions of the first and second baffle plates being respectively outward from the front portion. First and second warped portions that warp, and a joint portion that joins the first and second baffle plates is provided with a speaker hole;
A speaker mounted on the first and second baffle plates so as to emit sound from the speaker hole to the side forming the 90 ° angle of the first and second baffle plates;
The first and second back plates are arranged substantially parallel and spaced rearward from the first and second baffle plates, respectively, and the rear portions are at an angle of approximately 90 ° in the upright state. The first and second baffle plates are coupled to the front portions of the first and second back plates through the first and second warped portions, respectively. When,
One of an upper part and a lower part of a cylindrical body constituted by the first and second baffle plates, the coupling portion, the first and second back plates, and the first and second warped portions. A lid plate that closes the other of the upper and lower openings of the cylindrical body in a state where the opening is blocked by the ceiling or floor of the room, the cylindrical body, the ceiling or floor of the room, and the lid plate It is set as the structure which arrange | positions the said speaker in the sealed space formed by.

  According to the second speaker device, since the opening of one of the upper part and the lower part of the cylindrical body is closed by the ceiling or floor of the room, a lid plate for closing the one opening is not necessary, and the ceiling Or the floor can be used effectively. Therefore, when a small room (for example, a soundproof room for music practice) is used as the room, the second speaker device can be easily installed at the corner of the ceiling or floor. In such an installation state, wall surface reflection can be prevented in the same manner as described above with respect to the first speaker device.

A third speaker device according to the present invention is:
First and second baffle plates whose rear portions are coupled so as to form an angle of approximately 90 ° in an upright state, the front portions of the first and second baffle plates being respectively outward from the front portion. First and second warped portions that warp, and a joint portion that joins the first and second baffle plates is provided with a speaker hole;
A speaker mounted on the first and second baffle plates so as to emit sound from the speaker hole to the side forming the 90 ° angle of the first and second baffle plates;
First and second back plates disposed substantially in parallel rearward from the first and second baffle plates, respectively, wherein the front portions of the first and second back plates are respectively A combination of the first and second baffle plates via first and second warped portions;
The first and second baffle plates when the first and second back plates are respectively placed along the first and second walls constituting the corner of the room and the speaker is disposed immediately before the corners. One opening of the upper part and the lower part of the cylindrical body constituted by the coupling part, the first and second back plates, the first and second warped parts, and the first and second walls is formed. A lid plate that closes the other opening of the upper and lower portions of the cylindrical body in a state of being blocked by the ceiling or floor of the room, and the cylindrical body, the ceiling or floor of the room, and the lid plate The loudspeaker is arranged in the sealed space to be formed.

  According to the third speaker device, the first and second back plates are placed along the first and second walls constituting the corner of the room, respectively, and the speaker is disposed immediately before the first and second walls. Since the second baffle plate and its connecting portion, the first and second back plates, the first and second warped portions, and the first and second walls constitute a cylindrical body, In the vicinity thereof, the first and second walls constitute a cylindrical body instead of the first and second back plates, and the size of the first and second back plates can be reduced. In addition, since one of the upper and lower portions of the cylindrical body is closed by the ceiling or floor of the room, a lid plate for closing the one opening is not necessary, and the ceiling or floor can be used effectively. become. For this reason, when using a small room as a room like the 2nd speaker apparatus mentioned above, the 3rd speaker apparatus can be easily installed in the corner of a ceiling or a floor. In such an installation state, wall surface reflection can be prevented in the same manner as described above with respect to the first speaker device.

  In any one of the first to third speaker devices described above, the first and second warped portions are respectively located on the side where the first and second baffle plates form an angle of 90 °. In addition, it is preferable that the surface of the second baffle plate has a curved surface that continuously forms a smooth curved surface. In this way, it is possible to prevent a slight irregular disturbance in the frequency characteristics at the listening point based on the sound diffraction.

A fourth speaker device according to the present invention is:
First to third baffle plates each having two orthogonal sides, the first and second baffle plates having two sides orthogonal to each other such that the first and second baffle plates form an angle of approximately 90 °. One side of the second baffle plate is coupled to one side of the second baffle plate and the second baffle plate and the second baffle plate form an angle of approximately 90 °. The other one of the two orthogonal sides and one of the two orthogonal sides of the third baffle plate are coupled so that the first and third baffle plates form an angle of approximately 90 °. The other one of the two orthogonal sides of the first baffle plate and the other one of the two orthogonal sides of the third baffle plate are coupled, and the first to third baffle plates The front part is provided with first to third warp parts that warp outward from the front part, respectively, The corner portion formed by the binding of 3 of the baffle plate to the one speaker hole is provided,
A speaker mounted on the first to third baffle plates so as to emit sound from the speaker hole to the side forming the 90 ° angle of the first to third baffle plates;
1st-3rd back board which is arrange | positioned and spaced apart substantially parallel back from said 1st-3rd baffle board, respectively, and each has 2 sides orthogonal, Comprising: This 1st and 2nd back board Of the first back plate and one of the two orthogonal sides of the second back plate so that the first and second sides of the first back plate and the second back plate are orthogonal to each other. The second and third back plates are coupled behind the coupling portion of the baffle plate so that the second and third back plates form an angle of approximately 90 °, and the other one of the two orthogonal sides of the second back plate and the first side. One of two orthogonal sides of the back plate of 3 is joined behind the joint of the second and third baffle plates, and the first and third back plates form an angle of approximately 90 °. Thus, the other side of the two orthogonal sides of the first back plate and the other side of the orthogonal two sides of the third back plate are the first and first sides. The first to third baffle plates are coupled to the front portions of the first to third back plates via the first to third warped portions, respectively. The speaker is disposed in a sealed space formed by the first to third baffle plates, the first to third back plates, and the first to third warped portions. It is what.

  According to the fourth speaker device, the closed cabinet that houses the speaker is constituted by the first to third baffle plates, the first to third back plates, and the first to third warped portions. Since the first to third back plates are coupled to each other at an angle of 90 °, the fourth speaker device is connected to the rear part of the joined first to third back plates (the rear part of the cabinet). The corner can be easily installed in the room by placing it at a corner where two ridges of the room intersect each other at right angles. In such an installation state, sound radiated from the speaker is guided along the two walls and the ceiling or floor of the room on the side where the first to third baffle plates form an angle of 90 ° by two. It becomes like this. Therefore, sound reflection from the wall and ceiling or floor does not occur, and the original frequency characteristics of the speaker can be obtained at the listening point.

A fifth speaker device according to the present invention is:
First to third baffle plates each having two orthogonal sides, the first and second baffle plates having two sides orthogonal to each other such that the first and second baffle plates form an angle of approximately 90 °. One side of the second baffle plate is coupled to one side of the second baffle plate and the second baffle plate and the second baffle plate form an angle of approximately 90 °. The other one of the two orthogonal sides and one of the two orthogonal sides of the third baffle plate are coupled so that the first and third baffle plates form an angle of approximately 90 °. The other one of the two orthogonal sides of the first baffle plate and the other one of the two orthogonal sides of the third baffle plate are coupled, and the first to third baffle plates The front part is provided with first to third warp parts that warp outward from the front part, respectively, The corner portion formed by the binding of 3 of the baffle plate to the one speaker hole is provided,
A speaker mounted on the first to third baffle plates so as to emit sound from the speaker hole to the side forming the 90 ° angle of the first to third baffle plates;
1st to 3rd back plates arranged substantially in parallel rearward from the 1st to 3rd baffle plates, respectively, wherein the front portions of the 1st to 3rd back plates are respectively The first to third baffle plates are coupled to each other via first to third warped portions, and the speaker is placed immediately before the corner where two ridge lines of the room intersect each other at a right angle. The first and second back plates and the third back plate are arranged along the first and second walls and the ceiling or the floor, which are arranged and the corners, respectively. The speaker is disposed in a sealed space formed by two baffle plates, the first to third back plates, the first to third warped portions, the first and second walls, and the ceiling or floor. It is set as the structure which carries out.

  According to the fifth speaker device, the speaker is disposed immediately before the corner where the three ridge lines of the room intersect each other at a right angle, and the first and second walls and the ceiling or floor constituting the corner are arranged. Since the first and second back plates and the third back plate are arranged along the first and second back plates, the first and second walls and the ceiling or floor are the first to third back plates at the corner and the vicinity thereof. Instead of this, a cabinet is configured, and the first to third back plates can be reduced in size, and the ceiling or floor can be effectively used. For this reason, when using a small room as a room like the above about the 2nd speaker apparatus, the 5th speaker apparatus can be easily installed in the corner of a ceiling or a floor. In such an installation state, sound reflection from the wall, ceiling, or floor can be prevented in the same manner as described above for the fourth speaker device.

  In the above-described fourth or fifth speaker device, the first to third warps are the first to third on the side where the first to third baffle plates form an angle of 90 °. It is preferable that the surface of the baffle plate has a curved surface that continuously forms a smooth curved surface. In this way, it is possible to prevent disturbance of frequency characteristics at the listening point based on sound diffraction.

  According to the present invention, it is possible to realize a speaker device that is not affected by sound reflection from a wall, ceiling, or floor when used in a corner of a room, and has good flatness inherent to the speaker at a listening point. There is an effect of obtaining frequency characteristics. Further, the installation of the speaker device does not require a large-scale construction, and there is an effect that it can be easily installed.

  FIG. 1 shows a cross section of a speaker device according to the present invention. The principle of the speaker device according to the present invention will be described with reference to FIG.

  The speaker device 10 includes baffle plates 12 and 14, a speaker 16, and back plates 18 and 20. The baffle plates 12 and 14 have rear portions joined so as to form an angle of approximately 90 °. The front portions of the baffle plates 12 and 14 have warped portions 22 and 24 that warp outward from the front portions, respectively. Is provided. A speaker hole is provided in a coupling portion that couples the baffle plates 12 and 14, and the speaker 16 emits sound from the speaker hole to the side of the baffle plates 12 and 14 that forms an angle of 90 °. It is attached to.

  The back plates 18 and 20 are arranged rearward and substantially parallel to the baffle plates 12 and 14, respectively, and the rear portions are coupled to the back of the speaker 16 so as to form an angle of about 90 °. Baffle plates 12 and 14 are coupled to the front portions of the back plates 18 and 20 via warped portions 22 and 24, respectively.

  A cylindrical body is constituted by the baffle plates 12 and 14 and their connecting portions, the back plates 18 and 20, and the warped portions 22 and 24. The upper and lower openings of the cylindrical bodies are denoted by reference numerals 32 and 32 in FIG. It is closed by upper and lower cover plates as indicated by 34. As a result, the speaker 16 is disposed in a sealed space formed by the cylindrical body and the upper and lower cover plates. That is, the speaker 16 is housed in a sealed cabinet composed of a cylindrical body and upper and lower cover plates. Since the back plates 18 and 20 are joined so as to form an angle of 90 °, the rear portion of the cylindrical body (the rear portion of the cabinet) has a right cross section.

  The speaker device 10 is easily installed in a room so that the right-angled corner of the rear part of the cylindrical body is arranged at a corner (ridge line position) formed so as to form a right angle by the walls 26 and 28 of the room. Can do. In such an installation state, the sound emitted from the speaker 16 is guided along the left and right walls 26 and 28 of the room on the side of the baffle plates 12 and 14 forming the 90 ° angle. If the widths of the left and right wall surfaces formed by the baffle plates 12 and 14 are W, respectively, the operation is the same as when a speaker is embedded in the corner as shown in FIG. Sound reflection from the walls 26 and 28 does not occur. On the other hand, at a frequency lower than the frequency having W as a wavelength, the driver unit of the speaker 16 is several cm away from the corner formed by the walls 26 and 28, or the baffle plates 12 and 14 are several from the walls 26 and 28, respectively. Even if they are separated from each other by a distance of cm, the deviation is sufficiently short compared to the wavelength, so that the operation is the same as when a speaker is embedded in the corner as shown in FIG. 19, and sound reflection from the left and right walls 26 and 28 occurs. Absent. Therefore, the original frequency characteristic of the speaker 16 is obtained at the listening point. The width W shown in FIG. 1 can be about 10 to 50 [cm], and the wider the width W is, the more ideal frequency characteristics are.

  FIG. 2 shows the speaker device according to the first embodiment of the present invention. FIG. 3 is a front view of the speaker device, FIG. 4 is a sectional view taken along the line AA 'of FIG. The enlarged sectional views of the speaker 4 and the speaker mounting portion are shown in FIG. 2-5, the same code | symbol is attached | subjected to the part similar to FIG.

  The speaker device 10 includes baffle plates 12 and 14, speakers 16 (1) to 16 (N), back plates 18 and 20, and lid plates 32 and 34. The baffle plates 12 and 14 are rear portions connected to each other by a speaker mounting plate 30 so as to form an angle of approximately 90 ° in an upright state, and the front portions of the baffle plates 12 and 14 are respectively outward from the front portion. Warping portions 22 and 24 are provided. The warped portions 22, 24 have warped surfaces that form a smooth curved surface continuously on the surface of the baffle plates 12, 14 on the side of the baffle plates 12, 14 that forms an angle of 90 °.

A plurality of N speaker holes S _{1 to} S _N are formed in a line in the vertical direction on the speaker mounting plate 30 that joins the baffle plates 12 and 14. The number N of the speaker holes S _{1 to} S _N can be 16 as an example. Speakers 16 (1) to 16 (N) are attached to the speaker mounting plate 30 so as to emit sound from the speaker holes S _{1 to} S _N to the sides of the baffle plates 12 and 14 that form an angle of 90 °. . The speakers 16 (1) to 16 (N) are connected so as to have the same phase between the positive and negative output terminals of an output amplifier (not shown).

  The back plates 18 and 20 are arranged rearward and substantially parallel to the baffle plates 12 and 14, respectively, and the rear portions of the back plates 18 (16) to 16 (16) are formed so as to form an angle of approximately 90 ° in an upright state. Combined behind column (N). Baffle plates 12 and 14 are coupled to the front portions of the back plates 18 and 20 via warped portions 22 and 24, respectively.

Back plate 18 is adapted to the configuration joining the rear back plate 18a and the front back plate 18b at junction J ₁ as shown in FIG. 4, the back plate 20 also, the rear back plate 20a and the front back plate and 20b have become joined with the structures at the junction J _2. With this configuration, the assembling work can be easily performed. That is, after preparing the baffle plates 12 and 14 combined with the front back plates 18b and 20b through the warped portions 22 and 24, respectively, the speaker mounting plate 30 to which the speakers 16 (1) to 16 (N) are attached. Is attached to the rear part of the baffle plates 12 and 14. Thereafter, the rear back plates 18a and 20a having the rear portions joined to each other are joined to the front back plates 18b and 20b by bonding or the like at the joint portions J ₁ and J ₂ , respectively. Note that both the back plates 18 and 20 may be plates having no joints.

  The speakers 16 (1) to 16 (N) have the same configuration, and are similarly attached to the baffle plates 12 and 14. As a representative, the speaker mounting structure of the speaker 16 (3) will be described with reference to FIG.

  The speaker 16 (3) is of a movable coil type as an example, and includes a frame 40, a plate 42, a permanent magnet 43, a back plate 44, a center pole 45, a cone (vibrating plate) 46, a movable coil 47, and the like. A movable coil 47 is arranged in an air gap between the plate 42 coupled to the south pole of the permanent magnet 43 and the center pole 45 coupled to the north pole of the permanent magnet via the back plate 44. A movable coil 47 is attached to the root of the cone 46, and the sound signal is converted into sound when the cone 46 vibrates according to the sound signal supplied to the movable coil 47. A dust mask 48 is provided at the center of the cone 46 in order to prevent dust from entering the air gap. The speaker 16 (3) is attached to the speaker attachment plate 30 at the flange-shaped peripheral portion 41 of the frame 40. When mounting the speaker 16 (3), mount the speaker unit so that the sound source position of the driver unit is located at the position where the extension lines (shown by broken lines in FIG. 5) from the left and right wall surfaces of the baffle plates 12 and 14 intersect. Do.

  The baffle plates 12 and 14, the back plates 18 and 20, the warped portions 22 and 24, and the speaker mounting plate 30 constitute a cylindrical body, and the upper and lower openings of the cylindrical body have upper and lower lids, respectively. The plates 32 and 34 are closed so as not to leak sound. As a result, the speaker 16 is disposed in a sealed space formed by the cylindrical body and the cover plates 32 and 34. The cylindrical body can be created by wood processing or plastic molding.

  According to the above-described embodiment, the speaker device 10 has the right-angled corner at the rear of the cylindrical body located at the position (corner) of the ridgeline 27 where the walls 26 and 28 of the room intersect at a right angle as shown in FIG. Thus, it can be easily installed on the floor 36 in the room, for example. In such an installation state, sound reflection at the walls 26 and 28 does not occur according to the principle described above with reference to FIG. 1, and the original frequency characteristics of the speaker 16 can be obtained at the listening point. In addition, since the driver unit of the speaker is arranged on the corner ridgeline, the solid angle seen from the speaker is π, and the efficiency is four times as high as the radiation in free space, especially in the low frequency range that is omnidirectional ( That is, 6 dB) is improved. For this reason, there is an advantage that speakers having a small diameter can be used as the speakers 16 (1) to 16 (N).

  In the above-described embodiment, if the warped portions 22 and 24 have steep warped surfaces, slight irregularities in the frequency characteristics at the listening point occur due to sound diffraction. In the above-described embodiment, since the warped portions 22 and 24 have a curved surface that forms a smooth curved surface, such disturbance of frequency characteristics can be prevented.

  In the above-described embodiment, a large number of speakers 16 (1) to 16 (N) are arranged in the vertical direction to form a line array configuration, so that radiated sound is not diffused up and down, and forward directivity is enhanced. . Therefore, there is very little sound incident on the ceiling or floor, and there is little interference due to reflected sound from the ceiling or floor.

  However, suppression of directivity by the line array structure is accompanied by generation of side lobes, so that some reflected sound from the ceiling or floor is generated. In order to reduce the side lobe, the level of the sound signal input to the speakers at both ends of the line array and in the vicinity thereof may be lowered as the distance from the both ends approaches. As an example, when N = 24 speakers are arranged as speakers 16 (1) to 16 (N) at intervals of 7 [cm] for adjacent speakers, the speakers 16 (1) and 16 (N) at both ends are arranged. For the inner speakers 16 (2) and 16 (N-1), the signal level is lowered by 3 dB, and for the speakers 16 (1) and 16 (N) at both ends, the signal level is lowered by 6 dB. By doing so, the side lobes can be reduced and the frequency characteristics at the listening point can be further improved.

  In the above-described embodiment, since the line array configuration is used, the number of individual speakers may be the number divided by the square root of the number N. For example, in a space where a woofer of 30 [cm] is usually required, the ridge line driving method as shown in FIGS. In the case of a single line array, a diameter of 15/4 = 3.75 [cm] is sufficient. Such a small diameter for each speaker is not only advantageous in terms of cost, but also makes the speaker device of the present invention ideal by bringing the position of the driver unit of each speaker closer to the corner ridgeline. It will be closer to ridgeline driving.

  FIG. 6 shows a first modification of the above-described embodiment, and the same parts as those in FIGS. A cross section taken along line B-B 'of FIG. 6 is shown in FIG.

  The feature of the first modification is that, in the speaker device 10 of FIG. 2, the lower opening of the cylindrical body is closed by the floor 36 of the room instead of the cover plate 34. In this case, the rear back plates 18a and 20a indicated by broken lines in FIG. 7 are present in the same manner as shown in FIG. According to such a configuration, the cover plate 34 is not required, and the same operational effects as those of the speaker device of FIG. 2 can be obtained.

  In the first modification, the rear back plates 18a and 20a indicated by broken lines in FIG. 7 may be omitted. In this case, the front back plates 18b and 20b are placed along the walls 26 and 28, respectively, and the speakers 16 (1) to 16 (N) are all disposed immediately before the corner formed by the walls 26 and 28. The back plates 18b and 20b and the lower end of the cylindrical body are respectively coupled to the walls 26 and 28 and the floor 36 by means such as adhesion so as not to leak sound. According to such a configuration, the back plates 18a and 20a and the cover plate 34 are not necessary, and the same operational effects as the speaker device of FIG. 2 can be obtained.

  FIG. 8 shows a second modification of the embodiment shown in FIG. 2, and the same parts as those in FIGS. A cross section taken along line b-b 'in FIG. 8 is the same as the cross section shown in FIG.

  The feature of the second modification is that, in the speaker device 10 of FIG. 2, the upper opening of the cylindrical body is closed by the ceiling 38 of the room instead of the cover plate 32. In this case, the rear back plates 18a and 20a indicated by broken lines in FIG. 7 are present in the same manner as shown in FIG. According to such a configuration, the cover plate 32 is not required, and the same operational effects as the speaker device of FIG. 2 can be obtained.

  In the second modification, the rear back plates 18a and 20a indicated by broken lines in FIG. 7 may be omitted. In this case, the front back plates 18b and 20b are placed along the walls 26 and 28, respectively, and the speakers 16 (1) to 16 (N) are all disposed immediately before the corner formed by the walls 26 and 28. The back plates 18b and 20b and the upper end of the cylindrical body are respectively coupled to the walls 26 and 28 and the ceiling 38 by means such as adhesion so as not to leak sound. According to such a configuration, the back plates 18a and 20a and the cover plate 32 are not required, and the same operational effects as the speaker device of FIG. 2 can be obtained.

  The speaker device described above with reference to FIGS. 6 to 8 is suitable for installation in a small room such as a music practice soundproof room having an indoor floor area of about 1 to 4 tatami mats, for example. As a sound practice room for music practice, a speaker having a speaker device as shown in FIGS. 6 to 8 can be provided to the user.

  FIG. 9 shows a speaker device according to a second embodiment of the present invention. The cross sections taken along the line CC ′, DD ′ and EE ′ of the speaker device are shown in FIG. , 11 and 12. The speaker device according to the second embodiment is obtained by developing the two-dimensional wall reflection preventing concept adopted in the speaker device of FIG. 2 into a three-dimensional wall reflection preventing concept and embodying the concept related to this development. It is.

  The speaker device 50 includes baffle plates 52, 54 and 56, a speaker 16, and back plates 58, 60 and 62. Each of the baffle plates 52 to 56 has a sector shape having two sides orthogonal to each other. One side of the two sides of the baffle plate 52 and one side of the two sides of the baffle plate 54 are coupled so that the baffle plates 52 and 54 form an angle of approximately 90 °. The other side of the two sides of the baffle plate 54 and one side of the two sides of the baffle plate 56 are coupled so that the baffle plates 54 and 56 form an angle of approximately 90 °. The other one of the two sides of the baffle plate 52 and the other one of the two sides of the baffle plate 56 are joined so that the baffle plates 52 and 56 form an angle of approximately 90 °.

  The front portions of the baffle plates 52, 54, and 56 are respectively provided with warped portions 64, 66, and 68 that warp outward from the front portion. The warped portions 64, 66, and 68 have warped surfaces that continuously and smoothly form curved surfaces on the surfaces of the baffle plates 52, 54, and 56, respectively, on the side where the baffle plates 52, 54, and 56 form an angle of 90 °. This is to prevent disturbance of frequency characteristics based on sound diffraction as described above with reference to the embodiment of FIG.

  A speaker hole S is provided in a corner portion generated by the coupling of the baffle plates 52 to 56, and a speaker mounting plate 70 having a speaker hole corresponding to the speaker hole S is attached to the corner portion. The speaker 16 is attached to the speaker attachment plate 70 so as to emit sound from the speaker hole S to the side of the baffle plates 52 to 56 forming an angle of 90 °. The speaker mounting plate 70 may be omitted, and the speaker 16 may be directly mounted on the baffle plates 52 to 56.

  The back plates 58, 60, and 62 are all fan-shaped having two sides that are orthogonal to each other, and are arranged substantially parallel to the rear from the baffle plates 52, 54, and 56, respectively. One side of the two sides of the back plate 58 and one side of the two sides of the back plate 60 are coupled behind the coupling portion of the baffle plates 52 and 54 so that the back plates 58 and 60 form an angle of approximately 90 °. Has been. The other side of the two sides of the back plate 60 and the one side of the two sides of the back plate 62 are behind the joint portion of the baffle plates 54 and 56 so that the back plates 60 and 62 form an angle of approximately 90 °. It is combined with. The other side of the two sides of the back plate 58 and the other side of the two sides of the back plate 62 are joined to the baffle plates 52 and 56 so that the back plates 58 and 62 form an angle of approximately 90 °. It is joined behind. Baffle plates 52, 54, and 56 are coupled to the front portions of the back plates 58, 60, and 62 through warped portions 64, 66, and 68, respectively.

  As shown in FIGS. 10 to 12, the back plates 58 to 62 are configured such that the rear back plates 58 a to 62 a and the front back plates 58 b to 62 b are joined at the joint J. This is to simplify the assembly operation as described above with reference to FIG. Note that the back plates 58 to 62 can all be plates without the joint J.

  The baffle plates 52 to 56, the back plates 58 to 62, and the warped portions 64 to 68 constitute a sealed cabinet, and the speaker 16 is disposed in a sealed space in the cabinet. Since the back plates 58 to 62 are coupled so as to form an angle of 90 ° by two each, the speaker device 50 can connect the corners of the rear portions (rear portions of the cabinets) of the coupled back plates 58 to 62 to the three rooms of the room. It can be easily installed on the floor 36 in the room so as to be arranged at the corner where the ridge lines 25, 27, 29 intersect. In such an installation state, the sound radiated from the speaker 16 is guided along the two walls 26 and 28 and the floor 36 of the room on the side where the baffle plates 52 to 56 form an angle of 90 ° by two. It becomes like this. Therefore, reflection of sound from the walls 26 and 28 and the floor 36 does not occur, and the original frequency characteristics of the speaker can be obtained at the listening point. As shown in FIG. 8, the speaker device 50 can be arranged at the corner of the ceiling instead of the speaker device 10, and the same effect as the case where it is arranged at the corner of the floor 36 can be obtained.

  In the embodiment shown in FIG. 9, the back plates 58, 60 and 62 are all fan-shaped, but may be shaped like a triangle as indicated by alternate long and short dash lines 58 ', 60' and 62 '. In this case, the baffle plates 52 to 56 have the same shape as the back plates 58 to 62, respectively. The cabinet can be created for wood processing or plastic molding.

  FIG. 13 shows a modification of the embodiment shown in FIG. 9, and the same parts as those in FIGS.

  13 is that the rear back plates 58a, 60a and 62a constituting the back plates 58, 60 and 62 are omitted. In this case, the speaker 16 is disposed immediately before the corner where the three ridge lines 25, 27, 29 of the room intersect, and the back plates 58b, 60b, 62b are placed along the walls 26, 28 and the floor 36 constituting the corner, respectively. A sealed cabinet is configured, and the speaker 16 is arranged in a sealed space in the cabinet. According to such a configuration, the back plates 58a, 60a, and 62a are not necessary, and the same effects as the speaker device of FIG. 9 can be obtained.

  The speaker device shown in FIG. 13 can be arranged at the corner of the ceiling 38 instead of the speaker device 10 shown in FIG. 8, and the same effect as that obtained when arranged at the corner of the floor 36 can be obtained. The speaker device shown in FIG. 13 is suitable for installation in a small-sized room such as a soundproof room for music practice in the same manner as the speaker device described above with reference to FIGS.

  In addition, in the speaker device described above with reference to FIGS. 1 to 13, the coupling between the baffle plates, the coupling between the back plates, or the coupling between the warped portion of the baffle plate and the back plate may be either an integral coupling or a bonding by bonding. Good. Moreover, the installation method by a metal fitting or adhesion | attachment etc. can be utilized for installation of a speaker apparatus.

It is a cross-sectional view for explaining the principle of the speaker device according to the present invention. 1 is a perspective view showing a speaker device according to a first embodiment of the present invention. It is a front view of the speaker apparatus of FIG. FIG. 4 is a transverse sectional view taken along line A-A ′ of FIG. 3. It is sectional drawing which expands and shows the speaker and speaker attachment part of FIG. It is a perspective view which shows the speaker apparatus which concerns on the 1st modification of 1st Embodiment. It is sectional drawing which follows the B-B 'line of FIG. It is a perspective view which shows the speaker apparatus which concerns on the 2nd modification of 1st Embodiment. It is a perspective view which shows the speaker apparatus based on 2nd Embodiment of this invention. FIG. 10 is a cross-sectional view taken along line C-C ′ of FIG. 9. FIG. 10 is a cross-sectional view taken along line D-D ′ of FIG. 9. FIG. 10 is a cross-sectional view taken along line E-E ′ of FIG. 9. It is sectional drawing which shows the speaker apparatus which concerns on the modification of 2nd Embodiment. It is a cross-sectional view which shows the example which has arrange | positioned the conventional speaker apparatus in the vicinity of the wall in the room. It is a characteristic view which shows the frequency characteristic in the listening point which considered the sound reflection from a wall in the example of arrangement | positioning of FIG. It is a characteristic view which shows the frequency characteristic in the listening point which considered the sound reflection from another wall in the example of arrangement | positioning of FIG. FIG. 17 is a characteristic diagram illustrating a frequency characteristic obtained by synthesizing the frequency characteristics of FIGS. 15 and 16. FIG. 15 is a layout diagram illustrating a state in which speaker devices are respectively disposed at two mirror image positions related to the speaker device of FIG. 14. It is a layout view showing a state where the speaker device is embedded in the corner of the room.

Explanation of symbols

  10, 50: Speaker device, 12, 14, 52, 54, 56: Baffle plate, 16, 16 (1) to 16 (N): Speaker, 18, 20, 58, 60, 62: Back plate, 22, 24 64, 66, 68: Warpage, 26, 28: Room wall, 30, 70: Speaker mounting plate, 32, 34: Cover plate, 36: Room floor, 38: Room ceiling.

Claims (7)

First and second baffle plates whose rear portions are coupled so as to form an angle of approximately 90 ° in an upright state, the front portions of the first and second baffle plates being respectively outward from the front portion. First and second warped portions that warp, and a joint portion that joins the first and second baffle plates is provided with a speaker hole;
A speaker mounted on the first and second baffle plates so as to emit sound from the speaker hole to the side forming the 90 ° angle of the first and second baffle plates;
The first and second back plates are arranged substantially parallel and spaced rearward from the first and second baffle plates, respectively, and the rear portions are at an angle of approximately 90 ° in the upright state. The first and second baffle plates are coupled to the front portions of the first and second back plates through the first and second warped portions, respectively. When,
The upper and lower openings of the cylindrical body constituted by the first and second baffle plates, the coupling portion, the first and second back plates, and the first and second warped portions are respectively closed. A speaker device comprising a first cover plate and a second cover plate, wherein the speaker is arranged in a sealed space formed by the cylindrical body and the first cover plate and the second cover plate. First and second baffle plates whose rear portions are coupled so as to form an angle of approximately 90 ° in an upright state, the front portions of the first and second baffle plates being respectively outward from the front portion. First and second warped portions that warp, and a joint portion that joins the first and second baffle plates is provided with a speaker hole;
A speaker mounted on the first and second baffle plates so as to emit sound from the speaker hole to the side forming the 90 ° angle of the first and second baffle plates;
The first and second back plates are arranged substantially parallel and spaced rearward from the first and second baffle plates, respectively, and the rear portions are at an angle of approximately 90 ° in the upright state. The first and second baffle plates are coupled to the front portions of the first and second back plates through the first and second warped portions, respectively. When,
One of an upper part and a lower part of a cylindrical body constituted by the first and second baffle plates, the coupling portion, the first and second back plates, and the first and second warped portions. A lid plate that closes the other of the upper and lower openings of the cylindrical body in a state where the opening is blocked by the ceiling or floor of the room, the cylindrical body, the ceiling or floor of the room, and the lid plate A speaker device configured to arrange the speaker in a sealed space formed by First and second baffle plates whose rear portions are coupled so as to form an angle of approximately 90 ° in an upright state, the front portions of the first and second baffle plates being respectively outward from the front portion. First and second warped portions that warp, and a joint portion that joins the first and second baffle plates is provided with a speaker hole,
A speaker mounted on the first and second baffle plates so as to emit sound from the speaker hole to the side forming the 90 ° angle of the first and second baffle plates;
First and second back plates disposed substantially in parallel rearward from the first and second baffle plates, respectively, wherein the front portions of the first and second back plates are respectively A combination of the first and second baffle plates via first and second warped portions;
The first and second baffle plates when the first and second back plates are respectively placed along the first and second walls constituting the corner of the room and the speaker is disposed immediately before the corners. One opening of the upper part and the lower part of the cylindrical body constituted by the coupling part, the first and second back plates, the first and second warped parts, and the first and second walls is formed. A lid plate that closes the other opening of the upper and lower portions of the cylindrical body in a state of being blocked by the ceiling or floor of the room, and the cylindrical body, the ceiling or floor of the room, and the lid plate A speaker device configured to arrange the speaker in a sealed space to be formed.   The first and second warped portions warp continuously and smoothly on the surfaces of the first and second baffle plates, respectively, on the side of the first and second baffle plates forming an angle of 90 °. The speaker device according to claim 1, wherein the speaker device has a surface. First to third baffle plates each having two orthogonal sides, the first and second baffle plates having two sides orthogonal to each other such that the first and second baffle plates form an angle of approximately 90 °. One side of the second baffle plate is coupled to one side of the second baffle plate and the second baffle plate and the second baffle plate form an angle of approximately 90 °. The other one of the two orthogonal sides and one of the two orthogonal sides of the third baffle plate are coupled so that the first and third baffle plates form an angle of approximately 90 °. The other one of the two orthogonal sides of the first baffle plate and the other one of the two orthogonal sides of the third baffle plate are coupled, and the first to third baffle plates The front part is provided with first to third warp parts that warp outward from the front part, respectively, The corner portion formed by the binding of 3 of the baffle plate to the one speaker hole is provided,
A speaker mounted on the first to third baffle plates so as to emit sound from the speaker hole to the side forming the 90 ° angle of the first to third baffle plates;
1st-3rd back board which is arrange | positioned and spaced apart substantially parallel back from said 1st-3rd baffle board, respectively, and each has 2 sides orthogonal, Comprising: This 1st and 2nd back board Of the first back plate and one of the two orthogonal sides of the second back plate so that the first and second sides of the first back plate and the second back plate are orthogonal to each other. The second and third back plates are coupled behind the coupling portion of the baffle plate so that the second and third back plates form an angle of approximately 90 °, and the other one of the two orthogonal sides of the second back plate and the first side. One of two orthogonal sides of the back plate of 3 is joined behind the joint of the second and third baffle plates, and the first and third back plates form an angle of approximately 90 °. Thus, the other side of the two orthogonal sides of the first back plate and the other side of the orthogonal two sides of the third back plate are the first and first sides. The first to third baffle plates are coupled to the front portions of the first to third back plates via the first to third warped portions, respectively. The speaker is disposed in a sealed space formed by the first to third baffle plates, the first to third back plates, and the first to third warped portions. The speaker device. First to third baffle plates each having two orthogonal sides, the first and second baffle plates having two sides orthogonal to each other such that the first and second baffle plates form an angle of approximately 90 °. One side of the second baffle plate is coupled to one side of the second baffle plate and the second baffle plate and the second baffle plate form an angle of approximately 90 °. The other one of the two orthogonal sides and one of the two orthogonal sides of the third baffle plate are coupled so that the first and third baffle plates form an angle of approximately 90 °. The other one of the two orthogonal sides of the first baffle plate and the other one of the two orthogonal sides of the third baffle plate are coupled, and the first to third baffle plates The front part is provided with first to third warp parts that warp outward from the front part, respectively, The corner portion formed by the binding of 3 of the baffle plate to the one speaker hole is provided,
A speaker mounted on the first to third baffle plates so as to emit sound from the speaker hole to the side forming the 90 ° angle of the first to third baffle plates;
1st to 3rd back plates arranged substantially in parallel rearward from the 1st to 3rd baffle plates, respectively, wherein the front portions of the 1st to 3rd back plates are respectively The first to third baffle plates are coupled to each other via first to third warped portions, and the speaker is placed immediately before the corner where two ridge lines of the room intersect each other at a right angle. The first and second back plates and the third back plate are arranged along the first and second walls and the ceiling or the floor, which are arranged and the corners, respectively. The speaker is disposed in a sealed space formed by two baffle plates, the first to third back plates, the first to third warped portions, the first and second walls, and the ceiling or floor. A speaker device configured as described above.   The first to third warpage portions warp continuously and smoothly on the surfaces of the first to third baffle plates on the side forming the 90 ° angle of the first to third baffle plates, respectively. The speaker device according to claim 5 or 6 having a surface.

Images