JP2008182481A - Speaker system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a low-cost speaker system which includes a plurality of speakers differing in register and is flexibly adaptive to use states of sound. <P>SOLUTION: The speaker system has a tweeter (second speaker) 2 fitted to a fitting shaft (fitting portion) 6 provided coaxially with a woofer 1 (first speaker) in front of the woofer 1, and includes a first diffuser 3 which diffuses the sound from the first speaker and further equipped detachably with a second diffuser 4 which diffuses the sound from the second speaker. A movable shaft portion 62 of the fitting shaft 6 is bent around a hinge portion 61 as a fulcrum to tilt the tweeter 2. The second diffuser 4 is mounted while the second speaker is set in the same direction as that of the first speaker and then the speaker system functions as coaxial nondirectional speakers. While the second diffuser 4 is detached, the second speaker is set in a specified direction and then the speaker system functions as a directional speaker outputting sound in the specified direction. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a speaker device including a plurality of speakers having different sound ranges, and more particularly to an omnidirectional speaker device including a plurality of speakers coaxially.

  Conventionally, in the acoustic field, directional speakers that emit sound waves in a specific direction have been widely used. On the other hand, omnidirectional speakers that generate omnidirectional sound waves by diffusing the generated sound waves have also been put into practical use. Has been. An omnidirectional speaker has a wide range of listening to sound, and can three-dimensionally represent the localization of sound, giving a sense of presence to the listener.

Patent Document 1 discloses an example of an omnidirectional speaker device. The speaker device disclosed in Patent Document 1 has a low-frequency speaker and a high-frequency speaker coaxially provided in an opening of a cylindrical casing that is upright, so that sound waves can be output uniformly to the periphery of the speaker device. It is configured. Since the low-frequency speaker and the high-frequency speaker are arranged on the same axis, the sound localization is clearer than the speaker device in which the low-frequency speaker and the high-frequency speaker are distributed. There is an advantage.
Japanese Patent Laid-Open No. 5-56493

  Since the omnidirectional speaker can flow a uniform sound over a wide range, it is suitable for applications in which the same sound such as background music (BGM) or announcement is uniformly flowed over a wide range. On the other hand, high-quality audio within a narrow range, such as when individual announcements are played at specific locations, or when audio is viewed by the viewer located in front of the monitor when viewing images using the monitor. A directional speaker that emits a sound wave in a specific direction is suitable for the use of flowing sound. As described above, depending on the use situation of sound, there are a situation where an omnidirectional speaker is more suitable and a situation where a directional speaker is more suitable. Therefore, it is desirable to use different speakers depending on the situation. However, if both types of speakers are prepared so as to be able to flexibly cope with the use situation of voice, there is a problem that the cost increases. In particular, there is a problem that an individual user has a large financial burden and requires a large space for the speaker.

  The present invention has been made in view of such circumstances, and an object of the present invention is to flexibly adapt to the use situation of sound by being configured to be used as both a directional speaker and a non-directional speaker. And providing a low-cost speaker device.

  Another object of the present invention is to provide a speaker device that can suppress deterioration of sound due to vibration transmitted between the speakers in a speaker device having a plurality of speakers coaxially.

  The speaker device according to the present invention includes a first speaker, a second speaker having a different sound range from the first speaker, and the second speaker in front of the first speaker. And a mounting portion attached thereto, wherein the second speaker can be changed in direction.

  In the present invention, the second speaker is arranged in front of the first speaker to configure the speaker device, and the direction of the second speaker can be changed. By tilting the second speaker to an arbitrary angle, the direction of the second speaker can be directed to a specific direction.

  The speaker device according to the present invention is disposed between the first speaker and the second speaker, and the first diffuser for diffusing sound waves from the first speaker and the direction of the second speaker is the first speaker. It is further provided with a second diffuser that is detachably provided at a position facing the second speaker when set in the same direction as the speaker, and diffuses sound waves from the second speaker.

  In the present invention, the first diffuser for diffusing the sound from the first speaker is provided between the first speaker and the second speaker, and the sound from the second speaker facing the same direction as the first speaker. The 2nd diffuser which diffuses is detachably provided. When the second speaker is mounted with the second speaker set in the same direction as the first speaker, the sound from the first speaker and the second speaker is diffused. In a state where the second diffuser is removed and the second speaker is directed in a specific direction, the sound from the second speaker is emitted in a specific direction.

  In the speaker device according to the present invention, the attachment portion has a fixed shaft portion that extends forward from the center of the first speaker coaxially with the first speaker, and the first diffuser is connected to the fixed shaft portion. It is provided in a state of being penetrated without contact.

  In the present invention, the fixed shaft portion of the mounting portion to which the second speaker is mounted is provided in a non-contact state with respect to the first diffuser, so that the first speaker passes through the first diffuser and the mounting portion. Thus, vibration transmitted to the second speaker is reduced.

  In the speaker device according to the present invention, the attachment portion includes a hinge portion provided at one end of the fixed shaft portion, and the second speaker is attached to one end, and the other end is connected to the fixed shaft via the hinge portion. And a movable shaft part that can be refracted with the hinge part as a fulcrum.

  In the present invention, the attachment portion includes a hinge portion and a movable shaft portion connected to the fixed shaft portion via the hinge portion, and the movable shaft portion to which the second speaker is attached is attached to the fixed shaft portion with the hinge portion as a fulcrum. The second speaker can be tilted with respect to the axial direction.

  In the speaker device according to the present invention, the attachment portion includes a ball joint provided at one end of the fixed shaft portion, the second speaker attached to one end, and the other end connected to the fixed shaft via the ball joint. And a movable shaft portion that is swingable about the ball joint as a fulcrum.

  In the present invention, the attachment portion includes a ball joint and a movable shaft portion connected to the fixed shaft portion via the ball joint, and the movable shaft portion to which the second speaker is attached is in any direction with the ball joint as a fulcrum. It swings and the second speaker can be directed in an arbitrary direction.

  The speaker device according to the present invention is characterized in that the second speaker is a speaker that emits a higher sound range than the first speaker.

  Furthermore, in the present invention, the sound emitted from the second speaker is a sound in a higher sound range than the first speaker and has high directivity.

  In the present invention, the speaker device functions as a coaxial omnidirectional speaker by attaching the second diffuser with the direction of the second speaker set to be the same as the direction of the first speaker. By removing and directing the second speaker in a specific direction, it functions as a directional speaker that emits sound in a specific direction. In other words, it is possible to execute an optimal voice usage method according to the voice usage situation, and prepare both types of speakers, omnidirectional speakers and directional speakers, so that the voice usage situation can be flexibly handled. Therefore, it is possible to realize a low-cost speaker device that can flexibly cope with the use state of voice. In particular, for an individual user, the financial burden for the speaker device that can flexibly cope with the use situation of voice is reduced, and the space required for the speaker device can be reduced.

  In the present invention, since the attachment portion is in a non-contact state with the first diffuser, vibration transmitted from the first speaker to the second speaker through the first diffuser and the attachment portion is reduced, and the vibration causes the second speaker to be reduced. It is possible to suppress the deterioration of sound quality due to the disturbance of the sound from.

  In the present invention, the hinge portion is provided in the mounting portion for attaching the second speaker, so that the second speaker can be tilted at an arbitrary inclination with respect to the axial direction, and the sound is heard in a specific direction. It is possible to easily realize the function of the directional speaker that emits.

  In the present invention, the ball joint is provided in the mounting portion for attaching the second speaker, so that the second speaker can be directed in an arbitrary direction without moving the speaker device itself. It is possible to easily adjust so as to emit sound in the desired direction.

  Furthermore, in the present invention, by directing the second speaker that emits high directivity high-range sound in a specific direction, the speaker device is a directional speaker having good directivity of sound in the specific direction. The present invention has excellent effects such as being able to function.

Hereinafter, the present invention will be specifically described with reference to the drawings showing embodiments thereof.
FIG. 1 is a schematic perspective view showing an outline of the speaker device of the present invention. The speaker device includes a housing 5, a woofer (first speaker) 1 that is a speaker that emits mid to low-frequency sound, a tweeter (second speaker) 2 that is a speaker that emits high-frequency sound, and a sound wave from the woofer 1. The first diffuser 3 diffuses the second diffuser 4, the second diffuser 4 diffuses the sound wave from the tweeter 2, and the stand 51. The second speaker only needs to be a speaker that emits sound in a higher frequency range than the first speaker. The first speaker is a subwoofer for ultra-low sounds, the second speaker is a squawker for medium sounds, and the like. The first speaker and the second speaker may be configured in combination.

  The housing 5 is manufactured from a metal such as wood, aluminum, a translucent resin, or glass, and has a hollow cylindrical shape. In the present embodiment, the case 5 is described as having a substantially circular cylindrical shape in cross section. However, the present invention is not limited to this and may have an elliptical shape in cross section. Furthermore, the shape is not limited to a cylindrical shape, and may be a hollow triangular prism shape or a hollow polygonal column shape. A plurality of stands 51, 51, 51 are fixed to the outer peripheral surface of the housing 5 with screws or an adhesive on the lower side of the housing 5. The casing 5 is installed with stands 51, 51, 51 in the longitudinal direction.

  The woofer 1 is placed in the opening on the upper side of the housing 5, and a part of the first diffuser 3, the tweeter 2 and the second diffuser 4 are disposed on the same axis of the woofer 1 along the longitudinal direction of the housing 5. 5 protrudes from the upper opening. The first diffuser 3 has a substantially funnel shape, for example, and includes a support shaft 31 and a diffusion plate 32. As will be described later, one end (front end) of the support shaft 31 is fixedly installed on the yoke of the woofer 1, and the other end of the support shaft 31 is connected to the diffusion plate 32. The diffuser plate 32 has a circular shape in plan view and a substantially inverted triangle in side view, and diffuses sound waves from the diaphragm 11 of the woofer 1 in a direction intersecting the axial direction of the support shaft 31.

  The support shaft 31 is a hollow cylinder, and an attachment shaft (attachment portion) 6 having the tweeter 2 attached to one end is provided through the inside of the support shaft 31. The other end of the mounting shaft 6 is fixed to the yoke of the woofer 1. The tweeter 2 is supported by the mounting shaft 6 with the sound wave output surface facing upward. A second diffuser 4 having substantially the same shape as the first diffuser 3 is provided above the tweeter 2. The second diffuser 4 includes connecting rods 41, 41... And a diffusion plate 42. One end of the connecting rod 41 is detachably attached to the outer periphery of the diffusion plate 32 of the first diffuser 3, and the other end is fixed to the outer periphery of the diffusion plate 42. Note that the second diffuser 4 can be removed by releasing the connection between the connecting rod 41 and the outer periphery of the diffusion plate 32. The diffusing plate 42 has a circular shape in a plan view and a substantially inverted triangular shape in a side view provided on the upper side of the tweeter 2, and diffuses sound waves from the tweeter 2 in a direction intersecting the axial direction of the mounting shaft 6.

  2 is a schematic partial longitudinal sectional view showing the longitudinal section of the speaker device of the present invention, FIG. 3 is a perspective sectional view showing the longitudinal section of the speaker device of the present invention, and FIG. 4 is a component constituting the speaker device. It is a disassembled perspective sectional view which shows the longitudinal cross-section. The woofer 1 includes a yoke 12, a magnet 13, a top blade 14, a frame 15, a coil bobbin 16, a damper 17, an edge 18 and a diaphragm 11. An annular yoke 12 provided on the bottom of the woofer 1 as viewed from the bottom is formed in a flange shape, and is formed in a cylindrical shape with a bottom plate 121 positioned at the bottom of the woofer 1, and projects upward from the center of the bottom plate 121. The center pole 122 is configured. The flange-shaped bottom plate 121 and the cylindrical center pole 122 are formed with a vertical through hole including a central axis, and a thread groove 123 is formed on the inner surface of the through hole. As will be described later, the through hole and the screw groove 123 are formed to have a size capable of fixing the mounting shaft 6.

  On the bottom plate 121, a donut-shaped magnet 13, a top blade 14, a frame 15, and a damper 17 are placed. The coil bobbin 16 is provided on the outer peripheral surface of the center pole 122 and is wound around the outer periphery of the center pole 122 by a voice coil (not shown). The center pole 122 penetrates the concentric magnet 13 and the top blade 14 on the outer periphery together with the coil bobbin 16 on the outer periphery, and the coil bobbin 16 penetrates the frame 15 and the damper 17 on the outer periphery.

  The upper side of the coil bobbin 16 is connected to the diaphragm 11, and the coil bobbin 16 and the diaphragm 11 form a substantially funnel shape having a substantially Y shape in cross section. The diaphragm 11 has a substantially V-shaped cross-sectional view in which the radius in a plan view increases as it extends upward, and an annular edge 18 having a semicircular cross-sectional view is provided around the outer periphery where the radius is maximum. An annular holding plate 151 having a rectangular shape in cross section is further provided on the outer peripheral side of the edge 18. An annular step 52 having an L-shaped cross section is provided on the outer peripheral surface of the upper opening of the cylindrical housing 5, and the holding plate 151 of the woofer 1 is placed on the step 52.

  The first diffuser 3 includes a support shaft 31 and a diffusion plate 32. The support shaft 31 has a cylindrical shape, and a threaded portion 34 projects from the lower end, and the central portion is a vertical through hole including the central axis. On the outer peripheral surface of the screw portion 34, a screw thread for screwing into the screw groove 123 of the center pole 122 is formed. The outer peripheral radius of the threaded portion 34 is made to be substantially the same as the inner peripheral surface radius of the center pole 122 so as to be screwed into the screw groove 123 which is the inner peripheral surface of the center pole 122 of the yoke 12. The radius of the outer peripheral surface of the support shaft 31 is formed larger than the radius of the inner peripheral surface of the center pole 122 so that the screwing of the screw portion 34 into the screw groove 123 is terminated at an appropriate position. That is, the radius decreases in the order of the outer peripheral surface radius of the support shaft 31, the inner peripheral surface radius of the center pole 122, and the outer peripheral surface radius of the screw portion 34.

  When the first diffuser 3 is fixed to the yoke 12 of the woofer 1, the support shaft 31 is inserted from the upper side of the woofer 1 toward the through hole of the center pole 122, and the screw portion 34 is screwed into the screw groove 123 of the center pole 122. To do. When the screwing progresses, the head of the center pole 122 comes into contact with the bottom surface of the support shaft 31 whose radius increases, and the fixing of the first diffuser 3 is completed. In the present embodiment, the attachment method using the screw portion 34 and the screw groove 123 has been described as an example. However, the present invention is not limited to this, and may be fixed using an adhesive or the like. Alternatively, a hook may be provided, a hole may be provided instead of the screw groove 123, and the hook may be locked in the hole to fix the both.

  The opening at the other upper end of the cylindrical support shaft 31 is connected to the diffusion plate 32, and the support shaft 31 and the diffusion plate 32 form a substantially funnel shape having a substantially Y-shaped cross-sectional view. The diffusing plate 32 has a substantially V-shaped cross-sectional view in which the radius in plan view increases as it extends upward, and an annular edge 36 is provided around the outer periphery where the radius is maximum. Connection recesses 35 for supporting the connection rod 41 are provided at appropriate positions (four positions in the present embodiment) of the edge 36 with the opening facing upward.

  The attachment shaft 6 is connected to the fixed shaft portion 63 via the hinge portion 61, a fixed shaft portion 63 formed in a columnar shape having substantially the same diameter, a hinge portion 61 provided at one end on the upper side of the fixed shaft portion 63. The movable shaft portion 62 and the support portion 64 provided at the lower end of the fixed shaft portion 63 are included. The movable shaft portion 62 is a portion to which the tweeter 2 is attached, and a tip screw portion 621 for being screwed to the tweeter 2 is formed at one end. The hinge part 61 is a mechanism for connecting the other end of the movable shaft part 62 to the end of the fixed shaft part 63 so that the movable shaft part 62 can be refracted with respect to the fixed shaft part 63. The movable shaft part 62 is a hinge part. Refraction is possible with 61 as a fulcrum. The hinge portion 61 is configured to apply friction to a connecting portion between the movable shaft portion 62 and the fixed shaft portion 63 so that the angle of the movable shaft portion 62 with respect to the fixed shaft portion 63 can be held at an arbitrary angle. . In addition, the hinge part 61 may be provided with an angle holding mechanism such as a fixing screw that fixes the angle of the movable shaft part 62 with respect to the fixed shaft part 63 at an arbitrary angle.

  The support portion 64 is a portion that is fixed to the yoke 12 of the woofer 1 and supports the mounting shaft 6, and is formed in a columnar shape having a diameter larger than that of the fixed shaft portion 63. A screw portion 643 for screwing to 123 is formed. The inner diameter of the center pole 122 and the outer diameter of the screw portion 643 are substantially the same so that the screw portion 643 can be screwed into the screw groove 123. The support portion 64 includes a flat washer 642 and a head 641 having a diameter larger than the inner diameter of the center pole 122.

  The radius of the mounting shaft 6 is configured to decrease in the order of the support portion 64, the fixed shaft portion 63, and the tip screw portion 621. The length of the screw portion 643 in the longitudinal direction is such that the sum of the length of the screw portion 643 and the length of the screw portion 34 of the first diffuser 3 is the length of the screw groove 123 that is the inner peripheral surface of the center pole 122. The length may be approximately equal to or less than the length in the direction. For example, when the length in the longitudinal direction of the screw groove 123 which is the inner peripheral surface of the center pole 122 is 5 cm, the length in the longitudinal direction of the screw portion 643 is 4 cm, and the length in the longitudinal direction of the screw portion 34 of the first diffuser 3 is The length may be 1 cm.

  The fixed shaft 63 extends forward from the center of the woofer 1 coaxially with the woofer 1 in a state where the mounting shaft 6 is fixed to the yoke 12. These are penetrated so as not to contact the inner surface. Therefore, the radius of the fixed shaft portion 63 is set smaller than the inner peripheral surface radius of the center pole 122 and the inner peripheral surface radius of the support shaft 31. Thereby, the influence of the vibration by the support shaft 31 of the 1st diffuser 3 with respect to the attachment shaft 6 and the tweeter 2 is reduced. The length of the fixed shaft portion 63 in the longitudinal direction is such that when the screw portion 643 is completely screwed into the screw groove 123 and the tweeter 2 is attached to the movable shaft portion 62, the hinge portion 61 is a fulcrum as will be described later. The tweeter 2 may be set so as not to contact the first diffuser 3 even when the tweeter 2 is tilted. In the present embodiment, the support shaft 31 of the first diffuser 3 is cylindrical. However, the present invention is not limited to this, and any other shape may be used as long as it does not contact the mounting shaft 6. For example, a hollow polygonal tube shape may be used.

  The tweeter 2 includes a yoke 21 and a screw groove 22. A screw groove 22 is formed on the inner peripheral surface of the central portion of a donut-shaped yoke 21 provided on the bottom surface of the tweeter 2. The radius of the screw groove 22 is set to be substantially the same as the radius of the tip screw portion 621 so as to be able to be screwed with the tip screw portion 621 formed at the tip of the movable shaft portion 62 of the mounting shaft 6. When the movable shaft portion 62 of the mounting shaft 6 is refracted with the hinge portion 61 as a fulcrum, the tweeter 2 can be tilted with respect to the shaft of the speaker device.

  A procedure for attaching the attachment shaft 6 and the tweeter 2 after the first diffuser 3 is screwed to the woofer 1 will be described. The mounting shaft 6 is inserted from the lower side of the yoke 12 into the through hole of the center pole 122 with a flat washer 642 interposed. The movable shaft portion 62 and the fixed shaft portion 63 penetrate without screwing into the thread groove 123, and further penetrate through the center of the support shaft 31 of the first diffuser 3 so as not to come into contact when the screwing is completed. As the mounting shaft 6 is inserted, the screw portion 643 and the screw groove 123 are engaged with each other and the head 641 is rotated, whereby the screwing proceeds in the upward direction. When the screwing proceeds and the head 641 comes into contact with the yoke 12 via the flat washer 642, the screwing is completed. In this state, the support portion 64 of the attachment shaft 6 contacts and penetrates the center pole 122 of the yoke 12, and the fixed shaft portion 63 penetrates without contacting the support shaft 31 of the first diffuser 3, and the movable shaft portion 62 projects from the tip opening of the support shaft 31. The tip screw portion 621 formed on the movable shaft portion 62 is screwed into the screw groove 22 of the tweeter 2 so that the tweeter 2 is attached to the attachment shaft 6.

  The second diffuser 4 includes a diffusion plate 42, a connecting rod 41, and an edge 43. The second diffuser 4 has a bowl shape, and an annular edge 43 is provided around the outer periphery of the diffusion plate 42. A connecting rod 41 is suspended from appropriate positions of the edge 43 (four places in the present embodiment). The tip of the connecting rod 41 is inserted into a connecting recess 35 provided on the edge 36 of the first diffuser 3. Thereby, the attachment to the 1st diffuser 3 of the 2nd diffuser 4 is completed. In addition, the 2nd diffuser 4 can be removed from a speaker apparatus by pulling out the connection rod 41 from the connection recessed part 35. FIG.

  The woofer 1, the first diffuser 3, the mounting shaft 6, the tweeter 2, and the second diffuser 4 integrated by the above procedure are inserted from the upper opening of the housing 5 with the yoke 12 of the woofer 1 downward, and the holding plate By mounting 151 on the stepped portion 52, the speaker device of the present invention as shown in FIG. 1 is completed. A vibration absorbing gel or the like may be inserted between the holding plate 151 and the stepped portion 52.

  In the speaker device of the present invention shown in FIG. 1, the tweeter 2 faces upward, and the second diffuser 4 is disposed in front of the tweeter 2. When the speaker device is operated in this state, the sound wave emitted from the woofer 1 is diffused in the horizontal direction by the first diffuser 3, the sound wave emitted from the tweeter 2 is diffused in the horizontal direction by the second diffuser 4, and the speaker device is It functions as a coaxial omnidirectional speaker. At this time, since the attachment shaft 6 is not in contact with the first diffuser 3, vibration transmitted from the woofer 1 to the tweeter 2 through the first diffuser 3 and the attachment shaft 6 is reduced, and the sound from the tweeter 2 is caused by the vibration. It is possible to suppress deterioration of sound quality due to disturbance.

  FIG. 5 is a schematic perspective view showing the speaker device with the tweeter 2 tilted with the second diffuser 4 removed, and FIG. 6 is a schematic cross-sectional view of the speaker device with the tweeter 2 tilted with the second diffuser 4 removed. FIG. 7 is a perspective sectional view showing a longitudinal section of the speaker device in which the second diffuser 4 is removed and the tweeter 2 is tilted. As described above, the second diffuser 4 can be removed from the speaker device, and the movable shaft portion 62 of the mounting shaft 6 to which the tweeter 2 is attached is refracted with the hinge portion 61 as a fulcrum, whereby the tweeter 2 is It is possible to face in a direction inclined at an arbitrary angle with respect to the axial direction.

  By tilting the tweeter 2 to an arbitrary angle with the hinge 61 as a fulcrum and adjusting the position of the speaker around the axis, the tweeter 2 can be set in a specific direction such as the position of the listener. When the speaker device is operated in this state, the tweeter 2 functions as a directional speaker that emits sound in a specific direction. The high-frequency range sound emitted from the tweeter 2 has high directivity, and since the sound is not diffused by the diffuser, the tweeter 2 functions as a directional speaker having good directivity. Even in this state, the woofer 1 functions as an omnidirectional speaker, but the mid to low range sound emitted from the woofer 1 is inferior in directivity compared to the high range. Because of its low nature, the speaker device can emit sound with a directivity almost equivalent to that of a conventional directional speaker.

  As described above in detail, the speaker device of the present invention functions as a coaxial omnidirectional speaker by mounting the second diffuser 4 with the tweeter 2 facing in the same direction as the woofer 1. By removing and directing the tweeter 2 in a specific direction, it functions as a directional speaker that emits sound in a specific direction. That is, the speaker device of the present invention is used as an omnidirectional speaker in applications where the sound is evenly distributed over a wide range, such as when playing BGM, and when the viewer is made to listen to the sound during video viewing, etc. It can be used as a directional speaker in applications where high quality audio is played within a narrow range. As described above, since the speaker device of the present invention can be used as an omnidirectional speaker or a directional speaker, it is possible to execute an optimal audio usage method according to the audio usage status. Since it is not necessary to prepare both types of speakers so as to be able to flexibly cope with the voice usage situation, it is possible to flexibly deal with the voice usage situation and realize a low-cost speaker device. In particular, for an individual user, a financial burden for flexibly responding to a voice usage state is reduced, and a space necessary for the speaker device can be reduced. Furthermore, since the functions of the omnidirectional speaker and the directional speaker can be realized by a single speaker device, the use efficiency of the speaker device is improved as compared with the case where both types of speakers are prepared and used properly.

  In the present embodiment, the configuration in which the tweeter 2 can be tilted by providing the hinge portion 61 on the mounting shaft 6 is shown, but the present invention is not limited to this, and the speaker device of the present invention has other configurations. The tweeter 2 may be tilted. For example, the speaker device may have a configuration in which the hinge portion 61 is provided with a mechanism that can rotate around the axis of the fixed shaft portion 63. In the case of this form, the tweeter 2 can be more easily directed in a specific direction.

  The speaker device of the present invention may have a configuration in which the mounting shaft 6 is provided with a ball joint instead of the hinge portion 61 and the movable shaft portion 62 is connected to the end of the fixed shaft portion 63 via the ball joint. FIG. 8 is a schematic partial longitudinal sectional view showing a partial cross-sectional structure of the speaker device of the present invention in which the mounting shaft is provided with a ball joint. A ball joint 65 is provided at the end of the fixed shaft portion 63 of the mounting shaft 6, and the movable shaft portion 62 is connected to the fixed shaft portion 63 via the ball joint 65. The ball joint 65 includes a ball portion 651 integrally connected to the opposite end of the distal end screw portion 621 of the movable shaft portion 62, a resin bearing 652 that encloses the ball portion 651, and a housing 653 that encloses the bearing 652. And the vicinity of the opening of the housing 653 opened to the movable shaft portion 62 side is caulked to the shaft core side. The bearing 652 may be formed of grease or rubber. The movable shaft portion 62 can swing in any direction with the ball joint 65 as a fulcrum. The bearing 652 is configured to apply friction between the ball portion 651 and the housing 653 so that the angle of the movable shaft portion 62 with respect to the fixed shaft portion 63 can be held at an arbitrary angle.

  In the speaker device of the present invention including the configuration shown in FIG. 8, the movable shaft 62 can be refracted at any angle in any direction with the ball joint 65 as a fulcrum, and the tweeter 2 attached to the movable shaft 62. Can be directed in any direction. Therefore, the tweeter 2 can be directed in an arbitrary direction without moving the speaker device itself, and a speaker device that can be easily adjusted to emit sound in a user's desired direction is realized. it can.

It is a typical perspective view which shows the outline | summary of the speaker apparatus of this invention. It is a typical fragmentary longitudinal cross-sectional view which shows the longitudinal cross-section of the speaker apparatus of this invention. It is a perspective sectional view showing the longitudinal section of the speaker device of the present invention. It is a disassembled perspective sectional view which shows the longitudinal cross-section of the components which comprise a speaker apparatus. It is a typical perspective view which shows the speaker apparatus which removed the 2nd diffuser and inclined the tweeter. It is a typical fragmentary longitudinal cross-sectional view which shows the longitudinal cross-section of the speaker apparatus which removed the 2nd diffuser and inclined the tweeter. It is a perspective sectional view showing the longitudinal section of the speaker device which removed the 2nd diffuser and inclined the tweeter. It is a typical partial longitudinal cross-sectional view which shows a partial cross-section of the speaker device of the present invention in which the mounting shaft is provided with a ball joint.

Explanation of symbols

1 Woofer (first speaker)
DESCRIPTION OF SYMBOLS 11 Diaphragm 12 Yoke 121 Bottom plate 122 Center pole 123 Thread groove 14 Top blade 15 Frame 2 Tweeter (2nd speaker)
DESCRIPTION OF SYMBOLS 3 1st diffuser 31 Support shaft 32 Diffusion plate 34 Screw part 35 Connection recessed part 4 2nd diffuser 41 Connection rod 42 Diffusion plate 5 Case 6 Mounting shaft (mounting part)
61 Hinge part 62 Movable shaft part 63 Fixed shaft part 64 Support part 65 Ball joint

Claims (6)

In a speaker device including a plurality of speakers having different sound ranges,
A first speaker;
A second speaker having a different sound range from the first speaker;
An attachment portion for attaching the second speaker to the front of the first speaker;
The speaker device is characterized in that the second speaker can be changed in direction. A first diffuser disposed between the first speaker and the second speaker and diffusing sound waves from the first speaker;
A second diffuser that is detachably provided at a position facing the second speaker when the second speaker is oriented in the same direction as the first speaker, and diffuses sound waves from the second speaker. The speaker device according to claim 1, further comprising: The mounting portion has a fixed shaft portion that extends forward from the center of the first speaker coaxially with the first speaker;
The speaker device according to claim 2, wherein the first diffuser is provided in a state of penetrating the fixed shaft portion in a non-contact manner. The mounting portion is
A hinge portion provided at one end of the fixed shaft portion;
The second speaker is attached to one end, the other end is connected to the fixed shaft portion via the hinge portion, and further includes a movable shaft portion that can be refracted with the hinge portion as a fulcrum. The speaker device according to any one of claims 1 to 3. The mounting portion is
A ball joint provided at one end of the fixed shaft portion;
The second speaker is attached to one end, the other end is connected to the fixed shaft portion via the ball joint, and further includes a movable shaft portion swingable with the ball joint as a fulcrum. The speaker device according to claim 1, wherein the speaker device is characterized in that:   The speaker device according to any one of claims 1 to 5, wherein the second speaker is a speaker that emits a higher sound range than the first speaker.

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