JP2008182482A - Speaker device - Google Patents

Abstract

A speaker device capable of forming an optimum sound field according to user's preference is provided.
A speaker device includes a woofer 1 and a tweeter 2 having different sound ranges, and these are arranged coaxially. A diffuser 3 for diffusing sound waves from the woofer 1 is connected to one end of a rotating shaft 31. The rotating shaft 31 is screwed into the yoke of the woofer 1. Thereby, when the diffuser 3 is rotated, the rotation shaft 31 screwed into the yoke is rotated, and the diffuser 3 is raised or lowered in the axial direction. Further, the penetrating shaft penetrates the inside of the rotating shaft 31, and the tweeter 2 is attached to one end thereof. The holding portion existing on the lower side of the yoke holds the other end of the penetrating shaft and the other end of the rotating shaft 31. Accordingly, the holding portion rises or falls in the axial direction together with the through shaft and the turning shaft 31 according to the turning of the turning shaft 31, and the diffuser 3 and the tweeter 2 associated therewith also rise or fall.
[Selection] Figure 2

Description

  The present invention relates to a speaker device in which a plurality of speakers having different sound ranges are arranged on the same axis.

Conventionally, an omnidirectional speaker device has been proposed in which a speaker is provided in an opening of a hollow cylindrical body and diffuses sound waves in the peripheral direction of the speaker device (see, for example, Patent Document 1). In this omnidirectional speaker device, the horizontal axis directivity is 360 degrees omnidirectional, and the directional characteristics are good. There is also known an omnidirectional speaker system in which a low-frequency woofer and a high-frequency tweeter are coaxially arranged (see, for example, Patent Document 2). In this omnidirectional speaker system, the low-frequency speaker and the high-frequency speaker are arranged on the same axis, so that the sound localization is clearer than the speaker device in which these are distributed. There is.
JP 2001-224089 A Japanese Patent Laid-Open No. 5-56493

  However, the omnidirectional speaker system described in Patent Document 2 has a problem that a tweeter is fixed on the woofer, so that the user cannot create his / her favorite sound field. Further, in the omnidirectional speaker system described in Patent Document 2, there is a problem that the vibration of the bass woofer is transmitted to the tweeter provided on the upper side and the sound quality is deteriorated. That is, the tweeter vibrates as the cone paper of the bass woofer vibrates, and as a result, there is a problem that a clear sound cannot be output. Patent Document 1 does not describe any means for solving such a problem.

  The present invention has been made in view of such circumstances, and an object of the present invention is to provide a diffuser for diffusing sound waves from the first speaker, and to set the height of the diffuser and the second speaker relative to the first speaker. An object of the present invention is to provide a speaker device capable of forming an optimum sound field according to the user's preference by being configured to be adjustable.

  Another object of the present invention is to provide a cord connected to the second speaker by restricting the rotation of the through shaft to which the second speaker is attached with respect to the rotation of the rotation shaft connected to the diffuser. An object of the present invention is to provide a speaker device that is less likely to get tangled.

  Another object of the present invention is to provide a support portion installed inside the cylindrical body and screw the rotation shaft into the support portion, thereby further reducing the influence of vibration of the first speaker. Is to provide a simple speaker device.

  The speaker device according to the present invention includes a diffuser for diffusing sound waves from the first speaker and one end connected to the diffuser in a speaker device in which a first speaker and a second speaker having different sound ranges are arranged on the same axis. A cylindrical rotation shaft that is screwed into the yoke of the first speaker and rotates together with the diffuser, and a through-shaft that is attached to the one end of the second speaker and penetrates the rotation shaft. And a holding portion for holding the other end of the penetrating shaft and the other end of the rotating shaft.

  In the speaker device according to the present invention, a guide groove provided in the yoke, a guide shaft guided by the guide groove and protruding from the holding portion, and the other end of the through shaft fixed by the holding portion. And a fixing part.

  The speaker device according to the present invention is characterized in that the rotating shaft includes a screw groove that is screwed into a yoke of the first speaker, and a stopper that restricts screwing to the yoke.

  The speaker device according to the present invention includes a convex portion that protrudes in a direction that intersects the axial direction of the through shaft, and a step portion that is provided inside the rotation shaft and contacts the convex portion. To do.

  The speaker device according to the present invention includes a cylindrical body that houses the first speaker.

  The speaker device according to the present invention is a speaker device in which a first speaker and a second speaker having different sound ranges are arranged on the same axis, and a cylindrical body that houses the first speaker, and a support that is laid on the cylindrical body , A diffuser for diffusing sound waves from the first speaker, and one end connected to the diffuser, passing through the yoke of the first speaker, screwed into the support portion, and rotated together with the diffuser A cylindrical rotating shaft, a second shaft attached to one end, a penetrating shaft penetrating through the rotating shaft, and a holding portion for holding the other end of the penetrating shaft and the other end of the rotating shaft It is characterized by providing.

  The speaker device according to the present invention includes a guide groove provided in the support part, a guide shaft guided by the guide groove and protruding from the holding part, and the other end of the penetrating shaft fixed by the holding part. And a fixing portion.

  The speaker device according to the present invention includes a second diffuser that is attached to the diffuser and diffuses sound waves from the second speaker.

  In the speaker device according to the present invention, the first speaker is a low-frequency woofer, and the second speaker is a high-frequency tweeter.

  In the speaker device according to the present invention, the first speaker is provided at one end opening of the cylindrical body, and the diffuser and the second speaker protrude from the one end opening of the cylindrical body. .

  In the present invention, the speaker device includes a first speaker and a second speaker having different sound ranges, and these are arranged on the same axis. The first speaker is, for example, a woofer for low sounds, and the second speaker is, for example, a tweeter for high sounds. A diffuser for diffusing sound waves from the first speaker is connected to one end of the rotating shaft. The rotating shaft is screwed into the yoke of the first speaker. As a result, when the diffuser is rotated, the rotation shaft that is screwed into the yoke is rotated, and the diffuser is raised or lowered in the axial direction.

  The penetrating shaft penetrates the inside of the cylindrical rotating shaft, and a second speaker is attached to one end thereof. The holding part existing below the yoke holds the other end of the penetrating shaft and the other end of the rotating shaft. Accordingly, the holding unit rises or lowers in the axial direction together with the penetrating shaft and the turning shaft according to the turning of the turning shaft, and the diffuser and the second speaker associated therewith also rise or fall.

  In the present invention, the yoke is provided with a guide groove, and a guide shaft guided by the guide groove correspondingly projects from the holding portion. As a result, the holding portion does not rotate, but moves up or down in the axial direction by movement of the guide shaft by the guide groove. Moreover, the fixing part provided in the holding part fixes the other end of the through shaft. Accordingly, the through shaft fixed to the holding portion also rises or falls in the axial direction without rotating.

  In the present invention, the rotation shaft is provided with a thread groove that is screwed to the yoke of the first speaker, and a stopper that restricts screwing to the yoke. As a result, the rotation shaft rotates in accordance with the thread groove to rise or fall, and the screwing is restricted by the stopper, so that the lowering is restricted.

  In the present invention, a convex portion is provided so as to project in a direction intersecting the axial direction of the through shaft, and a step portion that contacts the convex portion is provided inside the rotation shaft. Since the convex part of the penetrating shaft comes into contact with the step portion inside the rotating shaft, the vertical movement of the penetrating shaft follows the vertical movement of the rotating shaft.

  In the present invention, the cylindrical body accommodates the first speaker, and a support portion is installed on the cylindrical body. The rotating shaft is not screwed to the yoke, but penetrates the yoke and is screwed to the support portion. Further, the through shaft to which the second speaker is attached at one end passes through the inside of the rotating shaft. The holding unit holds the other end of the penetrating shaft and the other end of the rotating shaft, and moves in the axial direction of the penetrating shaft and the rotating shaft. Accordingly, when the diffuser is rotated, the rotation shaft is raised or lowered by screwing at the support portion, the through shaft held by the holding portion is also raised or lowered, and the second speaker attached to the through shaft Also rises or falls.

  In the present invention, since the rotation shaft is screwed to the yoke of the first speaker, when the diffuser is rotated, the rotation shaft screwed to the yoke rotates, and the diffuser is axially moved. Will go up or down. The penetrating shaft passes through the inside of the cylindrical rotating shaft, and a second speaker is attached to one end thereof, and the holding unit holds the other end of the penetrating shaft and the other end of the rotating shaft. Accordingly, the holding portion rises or falls in the axial direction together with the penetrating shaft and the turning shaft in accordance with the turning of the turning shaft, and the diffuser and the second speaker associated therewith also rise or fall. Accordingly, the diffuser and the tweeter move up and down simply by rotating the diffuser by the user, and a desired sound field can be created according to the up and down movement.

  In the present invention, the yoke is provided with a guide groove, and a guide shaft guided by the guide groove correspondingly projects from the holding portion. As a result, the holding portion does not rotate, but moves up or down in the axial direction by movement of the guide shaft by the guide groove. Moreover, the fixing | fixed part provided in a holding | maintenance part fixes the other end of a penetration axis | shaft. Accordingly, the through shaft fixed to the holding portion also rises or falls in the axial direction without rotating. As a result, the pivot shaft moves in the vertical direction while rotating, whereas the penetrating shaft to which the second speaker is attached moves in the vertical direction without rotating, so it is connected to the second speaker. It is possible to avoid the situation where the code gets tangled.

  In the present invention, the rotation shaft is provided with a thread groove that is screwed to the yoke of the first speaker, and a stopper that restricts screwing to the yoke. As a result, the rotation shaft rotates in accordance with the thread groove to rise or fall, and the screwing is restricted by the stopper, so that the lowering is restricted. Thereby, it can prevent that the diffuser connected with a rotating shaft moves below more than necessary. As a result, it is possible to avoid contact between the diffuser and the first speaker existing below the diffuser.

  In the present invention, a convex portion is provided so as to project in a direction intersecting the axial direction of the through shaft, and a step portion that contacts the convex portion is provided inside the rotation shaft. Since the convex part of the penetrating shaft comes into contact with the step portion inside the rotating shaft, the vertical movement of the penetrating shaft follows the vertical movement of the rotating shaft.

  In the present invention, the cylindrical body accommodates the first speaker, and a support portion is installed on the cylindrical body. The rotating shaft is not screwed to the yoke, but penetrates the yoke and is screwed to the support portion. Further, the through shaft to which the second speaker is attached at one end passes through the inside of the rotating shaft. The holding unit holds the other end of the penetrating shaft and the other end of the rotating shaft, and moves in the axial direction of the penetrating shaft and the rotating shaft. Accordingly, when the diffuser is rotated, the rotation shaft is raised or lowered by screwing at the support portion, the through shaft held by the holding portion is also raised or lowered, and the second speaker attached to the through shaft Also rises or falls. In this case, the pivot shaft connected to the diffuser is screwed to the support portion, not the yoke, so that the vibration of the first speaker relative to the second speaker can be further reduced. Has an excellent effect.

Embodiment 1
Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic perspective view showing an outline of the speaker device. The speaker device includes a housing 5 (cylinder), a first speaker 1, a second speaker 2, a diffuser 3, a second diffuser 4, and a stand 510. In the following description, it is assumed that the first speaker 1 is a low-frequency woofer 1 and the second speaker 2 is a high-frequency tweeter 2. However, the present invention is not limited to this. For example, the first speaker 1 or the second speaker 2 may be applied in combination as appropriate.

  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 510, 510, 510 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 woofer 1 is placed in the opening on the upper side of the housing 5, and the diffuser 3, the tweeter 2, and the second diffuser 4 are coaxially connected to the woofer 1 along the longitudinal direction of the housing 5 from the opening on the upper side of the housing 5. It protrudes. The diffuser 3 includes a diffusion plate 32 that diffuses sound waves from the woofer 1, and a rotating shaft 31 is connected to the diffusion plate 32. The diffusion plate 32 and the rotation shaft 31 connected to the diffusion plate 32 have a substantially funnel shape. As will be described later, a part of the shaft of the rotating shaft 31 is screwed into the yoke of the woofer 1, and ascends or descends in the axial direction along with the rotation. The diffusion plate 32 connected to one end of the rotating shaft 31 has a circular shape in a plan view and a substantially V shape in a side view, and the sound wave from the diaphragm 11 of the woofer 1 intersects the axial direction of the rotating shaft 31. It spreads in the direction to do.

  The rotation shaft 31 is a hollow cylinder, and a through shaft (not shown) passes through the inside as will be described later. One end of the penetrating shaft is attached to the tweeter 2, and the other end is fixed to a holding portion described later. The tweeter 2 is supported by the penetrating shaft with the sound wave output surface facing upward. A second diffuser 4 having substantially the same shape as the 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, 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 provided on the upper side of the tweeter 2 and a substantially V shape in a side view, and diffuses sound waves from the tweeter 2 in a direction intersecting the axial direction of the rotating shaft 31.

  When the diffuser 3 is gripped and rotated counterclockwise, the rotation shaft 31 connected to the diffusion plate 32 of the diffuser 3 also rotates and rises accordingly. FIG. 2 is a schematic perspective view of the speaker device showing a state where the diffuser 3 is raised. As the rotating shaft 31, the diffuser 3 and the second diffuser 4 rotate, they rise. Further, the tweeter 2 does not rotate, but rises as the rotating shaft 31, the diffuser 3 and the second diffuser 4 rise. The rotating shaft 31 has a configuration in which the outer diameter decreases with the stopper 312 in the middle as a boundary, and a screw groove 311 is formed on the lower side where the outer diameter is smaller than the upper side of the stopper 312.

  A thread corresponding to the thread groove 311 is formed in the yoke as will be described later. When lowering the diffuser 3 or the like, the diffuser 3 is rotated clockwise. The rotating shaft 31 connected to the diffuser 3 also rotates and descends clockwise according to the screw groove 311. Thereby, the rotating shaft 31, the diffuser 3, and the second diffuser 4 are lowered while rotating. In addition, the tweeter 2 does not rotate and descends as the rotating shaft 31, the diffuser 3 and the second diffuser 4 descend. When the rotation of the rotation shaft 31 proceeds and the stopper 312 comes into contact with the yoke, the rotation for lowering is restricted and the state shown in FIG. 1 is restored.

  3 is a schematic longitudinal sectional view showing a longitudinal section of the speaker device, FIG. 4 is a perspective view showing a longitudinal section of the speaker device, and FIG. 5 is an exploded perspective view showing longitudinal sections of components constituting the speaker device. 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. The bottom yoke 12 provided at the bottom of the woofer 1 includes a bottom plate 121, a center pole 122, and a screw thread 123. The donut-shaped bottom plate 121 is provided with a screw hole 124 through which the rotation shaft 31 is inserted at the center, and a center pole 122 is projected upward from the center of the bottom plate 121.

  The center pole 122 has a cylindrical shape, and a screw hole 124 passes through the inside. A screw thread 123 is formed around the screw hole 124, that is, on the inner peripheral surface of the center pole 122. A screw groove 311 provided on a peripheral surface below the stopper 312 of the rotating shaft 31 is screwed into the screw thread 123. That is, the inner diameter of the center pole 122 and the outer diameter of the peripheral surface on which the screw groove 311 on the lower side of the rotation shaft 31 is formed have substantially the same diameter so as to be screwed together. Although the thread 123 is provided on the inner peripheral surface of the center pole 122 of the yoke 12 and the screw groove 311 is provided on the lower peripheral surface of the rotating shaft 31, the inner periphery of the center pole 122 of the yoke 12 is conversely arranged. A screw groove 123 may be provided, and a screw thread 311 may be provided on the lower peripheral surface of the rotation shaft 31.

  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 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 51 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 51.

  Next, the configuration of the diffuser 3 and the through shaft 6 will be described. The diffuser 3 includes a rotation shaft 31, a screw groove 311, a guide tube 33, a stopper 312, a step portion 331, a tip surface 330, a connection recess 35, an edge 36, and a diffusion plate 32. 64, a tip screw portion 62, and a convex portion 61. The rotating shaft 31 has a cylindrical shape connected to the diffusion plate 32 on the upper side (one end), and a guide tube 33 for inserting the through shaft 6 is formed in the tube. The rotation shaft 31 is formed so that the outer diameter of the cylinder is reduced by a predetermined length at a stopper 312 in the middle from the upper side to the lower side (the other end). On the lower outer peripheral surface of the stopper 312 of the rotating shaft 31, a screw groove 311 is formed to be screwed with the screw thread 123 on the inner peripheral surface of the center pole 122 of the yoke 12.

  As described above, the outer diameter of the rotation shaft 31 in which the screw groove 311 is formed is equal to the outer diameter of the inner peripheral surface of the center pole 122 so as to be engaged with the screw thread 123 that is the inner peripheral surface of the center pole 122 of the yoke 12. It is created to be approximately the same. Further, the outer diameter of the rotation shaft 31 above the stopper 312 is made larger than the outer diameter of the inner peripheral surface of the center pole 122 so that the screwing to the screw thread 123 is terminated at an appropriate position. . When the rotating shaft 31 is rotated clockwise, the diffuser 3 is lowered, and when the stopper 312 comes into contact with the upper surface 126 of the center pole 122, the screwing is restricted and the lowering is also finished.

  The upper end of the cylindrical rotation shaft 31 is integrally connected to the diffusion plate 32, and the rotation shaft 31 and the diffusion plate 32 form a substantially funnel shape having a substantially Y-shaped cross section. 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 connecting rod 41 are provided at appropriate positions of the edge 36, in four places in the present embodiment, with the opening facing upward.

  A tip screw portion 62 for attaching the tweeter 2 is provided on the upper side (one end) of the through shaft 6. A screw thread is formed on the outer peripheral surface of the tip screw portion 62. A screw groove 22 for screwing the tip screw portion 62 is formed on the bottom surface of the central portion of the yoke 21 of the tweeter 2 toward the upper side. The screw thread 22 formed in the yoke 21 of the tweeter 2 is screwed into the tip screw portion 62 of the through shaft 6, whereby the attachment of the tweeter 2 to the through shaft 6 is completed.

  The penetrating shaft 6 has a cylindrical shape with a longer length in the longitudinal direction than the rotating shaft 31, and a convex portion 61 is projected at a substantially central portion. The penetrating shaft 6 may be formed in a cylindrical shape like the rotating shaft 31, and the cord for the tweeter 2 may be passed inside the cylinder. The convex portion 61 has a donut shape having an outer diameter longer than the outer diameter of the penetrating shaft 6 by a predetermined length, and a step portion 331 provided on the lower surface of the convex portion 61 and a substantially central portion of the guide tube 33 of the rotating shaft 31. And abut. The convex portion 61 is provided so as to project in a direction intersecting with the central axis of the penetrating shaft 6 and increasing the outer diameter of the penetrating shaft 6. On the other hand, in order to support the convex portion 61, the step portion 331 is a direction intersecting with the central axis of the rotation shaft 31 and a direction in which the inner diameter of the rotation shaft 31 decreases (the outer diameter of the guide tube 33 decreases). Projecting in the direction of When the step portion 331 is raised or lowered by the rotation of the rotation shaft 31, the protruding portion 61 comes into contact with the step portion 331, so that the through shaft 6 is raised or lowered without turning.

  The outer diameter of the through shaft 6 is smaller than the inner diameter of the rotating shaft 31 (the outer diameter of the guide tube 33) and the inner diameter below the step portion 331. In addition, the outer diameter of the convex portion 61 is smaller than the inner diameter of the rotating shaft 31, but is configured to be larger than the inner diameter below the step portion 331 so as to allow contact with the step portion 331. The convex portion 61 may be formed integrally with the through-shaft 6 or may be fixed with an adhesive or the like at an appropriate position after being inserted into the through-shaft 6 using an annular rubber member or the like.

  A threaded portion 64 projects from the lower side (the other end) of the through shaft 6 and is fixed to the yoke 12 by a fixing portion (hereinafter referred to as a nut 65) with the holding portion 7 interposed. A thread groove is formed on the outer peripheral surface of the threaded portion 64 so as to be able to be screwed with the nut 65. The holding portion 7 holds the rotating shaft 31 and the penetrating shaft 6, and includes a disk portion 73, a center hole 72 in which a screw groove is formed on the inner peripheral surface, and a guide shaft 71. The disk part 73 is a thin disk having a concentric circular shape in a plan view in which a center hole 72 for inserting the screw part 64 is formed in a substantially central part. The screw part 64 is screwed into the center hole 72 of the disk part 73, and the screw part 64 is screwed by the nut 65 on the lower surface thereof.

  Guide shafts 71, 71 project from the upper surface of the disk portion 73 in the same direction as the projecting direction of the center pole 122. Corresponding to these guide shafts 71, 71, guide grooves 125, 125 are formed in the center pole 122 from the bottom surface of the yoke 12 toward the projecting direction of the center pole 122. The guide shafts 71 and 71 are guided by the guide grooves 125 and 125, and finally, the upper surface of the disk portion 73 comes into contact with the bottom surface of the bottom plate 121, and the movement stops. The groove depth of the guide groove 125 allows the disk portion 73 to move downward along the guide shaft 71, and the upper surface of the disk portion 73 and the bottom surface of the bottom plate 121 come into contact with each other when moved upward. Thus, the length may be slightly longer than the guide shaft 71.

  The tip surface 330 of the rotating shaft 31 is in contact with the upper surface of the disk portion 73. Even when the rotating shaft 31 rotates, the tip end surface 330 freely rotates on the upper surface of the disk portion 73. Along with the rotation of the rotation shaft 31, the through shaft 6 also rises or falls together due to the fixing of the screw portion 64 by the center hole 72 and the nut 65 and the support by the step portion 331 of the convex portion 61. The disc portion 73 does not rotate by the insertion of the guide grooves 125, 125 of the shafts 71, 71, and similarly, the through shaft 6 and the tweeter 2 connected thereto via the center hole 72 and the screw portion 64 also rotate. There is no.

  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. Connecting rods 41 are suspended at appropriate positions of the edge 43, that is, at four positions in the present embodiment. The distal end of the connecting rod 41 is inserted into a connecting recess 35 provided on the edge 36 of the diffuser 3.

  Next, a procedure for attaching the woofer 1, the diffuser 3, the through shaft 6, the tweeter 2, and the like to the housing 5 will be described with reference mainly to FIG. First, the rotating shaft 31 of the diffuser 3 is screwed into the screw hole 124 opened above the center pole 122 of the woofer 1. The screw groove 311 of the rotation shaft 31 is screwed into a screw thread 123 formed on the inner peripheral surface of the center pole 122, and is rotated clockwise. The rotation shaft 31 descends with the rotation, and as the descent proceeds, the stopper 312 of the rotation shaft 31 and the upper surface 126 of the center pole 122 come into contact with each other, and the rotation is restricted (state of FIG. 4).

  Next, the through shaft 6 is inserted into the guide tube 33 of the diffuser 3. The insertion is stopped when the insertion of the through shaft 6 proceeds and the convex portion 61 contacts the step portion 331. In this case, the lower portion of the through-shaft 6 than the convex portion 61 protrudes from the bottom surface of the bottom plate 121 by a predetermined length. The guide shafts 71 and 71 of the holding part 7 are inserted toward the guide grooves 125 and 125 from the lower side of the woofer 1. As the insertion proceeds, the screw portion 64 contacts the upper side of the center hole 72. The through shaft 6 is screwed into the center hole 72. When the screwing is advanced, the upper surface of the disk portion 73 comes into contact with the distal end surface 330 of the rotating shaft 31, and the screw portion 64 protrudes from the lower side of the center hole 72 by a predetermined length.

  The threaded portion 64 of the through shaft 6 protruding from the lower surface center hole 72 of the disk portion 73 is tightened with the nut 65, and the attachment of the rotating shaft 31 and the through shaft 6 of the diffuser 3 to the yoke 12 is completed. Thereafter, the tip screw portion 62 protruding above the through shaft 6 is inserted into the screw groove 22 of the tweeter 2 and the tweeter 2 is rotated clockwise, whereby the attachment of the tweeter 2 to the through shaft 6 is completed. Note that when the tweeter 2 is attached to the through shaft 6, the length of the through shaft 6 may be set so that the tweeter 2 does not contact the diffusion plate 32.

  The connecting rod 41 of the second diffuser 4 is inserted into the connecting recess 35 of the diffuser 3, and the attachment of the second diffuser 4 to the diffuser 3 is completed. The woofer 1, the diffuser 3, the through 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 151 is attached. The speaker device is completed by mounting on the stepped portion 51. A vibration absorbing gel or the like may be inserted between the holding plate 151 and the step portion 51.

  3 and 4, when the diffuser 3 is rotated counterclockwise, the penetrating shaft 6 and the tweeter 2 rise without rotating, and the diffuser 3, the rotating shaft 31, and the second diffuser 4 are rotated. Will rise. 6 is a schematic longitudinal sectional view showing a longitudinal section when the speaker device is raised, and FIG. 7 is a perspective view showing a longitudinal section when the speaker device is raised. When the diffuser 3 is rotated counterclockwise, the rotation shaft 31 itself is also rotated counterclockwise by the threaded engagement between the thread groove 311 of the rotation shaft 31 and the thread 123 on the circumferential surface of the center pole 122. To do. In addition, since the front end surface 330 of the rotating shaft 31 is not fixed on the upper surface of the disk part 73, and is only placed, the rotational motion is not hindered.

  As the rotation shaft 31 rises, the step portion 331 also rises while rotating. The convex portion 61 that comes into contact with the step portion 331 rises without rotating as the step portion 331 rises, and as a result, the through shaft 6 and the holding portion 7 fixed via the screw portion 64 and the nut 65 also rise. The holding part 7 is lifted without rotating as the guide shafts 71 and 71 are guided by the guide groove 125 of the center pole 122. Ascending of the holding unit 7 proceeds, and the rising stops when the upper surface of the disk part 73 of the holding unit 7 comes into contact with the bottom surface of the bottom plate 121 (the state shown in FIGS. 6 and 7).

  6 and 7, when the diffuser 3 is rotated clockwise, the diffuser 3 is rotated by using the screw groove 311 of the rotating shaft 31 and the screw thread 123 of the center pole 122. And descend. Since the front end surface 330 of the rotating shaft 31 pushes the upper surface of the disk portion 73 of the holding portion 7 downward, the holding portion 7 and the through shaft 6 and the tweeter 2 fixed thereto start to descend without rotating. When the rotation progresses and the stopper 312 of the rotation shaft 31 comes into contact with the upper surface 126 of the center pole 122, the rotation is restricted and the descent ends (states of FIGS. 3 and 4).

Embodiment 2
In the first embodiment, the rotation shaft 31 rotates, while the penetrating shaft 6 and the tweeter 2 do not rotate. However, as described in the second embodiment, the rotation shaft 31 rotates. In addition, the through shaft 6 and the tweeter 2 may be rotated. 8 is a schematic longitudinal sectional view showing a longitudinal section of the speaker device according to the second embodiment, FIG. 9 is a perspective view showing a longitudinal section of the speaker device according to the second embodiment, and FIG. 10 is according to the second embodiment. It is a disassembled perspective view which shows the longitudinal cross-section of the components which comprise a speaker apparatus.

  Unlike the first embodiment, the penetrating shaft 6 of the second embodiment is not provided with the convex portion 61. Further, the step portion 331 is not provided on the inner peripheral surface of the rotation shaft 31 corresponding to the convex portion 61. That is, the outer diameter of the guide tube 33 is uniform from the upper side to the lower side. Guide shafts 332 and 332 protrude from the distal end surface 330 of the rotation shaft 31 downward. On the other hand, guide grooves 74 and 74 for guiding the guide shafts 332 and 332 are provided on the upper surface of the disk portion 73 of the holding portion 7. The center pole 122 is not provided with a guide groove 125.

  Guide shafts 332 and 332 protruding from the rotation shaft 31 are inserted into the guide grooves 74 and 74 of the holding unit 7. On the other hand, the through shaft 6 is screwed to the holding portion 7 by the center hole 72, the screw portion 64 and the nut 65. Thereby, the rotation of the rotation shaft 31 is transmitted to the through shaft 6 through the rotation of the disk portion 73 by the insertion of the guide shaft 332 into the guide groove 74. As a result, the penetrating shaft 6 and the tweeter 2 are raised or lowered while rotating in accordance with the rising or lowering accompanying the rotation of the rotating shaft 31. In the second embodiment, the outer diameter of the inner peripheral surface of the rotating shaft 31 (the outer diameter of the guide tube 33) is set to the outside of the through shaft 6 so that the through shaft 6 does not contact the guide tube 33 of the rotating shaft 31. What is necessary is just to set larger than a diameter. Thereby, the part where the rotating shaft 31 and the through shaft 6 come into contact is only the holding portion 7, and the vibration of the diffuser 3 due to the sound wave of the woofer 1 is less likely to be transmitted to the through shaft 6 and thus the tweeter 2. A sound field can be formed.

  The second embodiment is configured as described above, and the other configurations and operations are the same as those of the first embodiment. Therefore, corresponding parts are denoted by the same reference numerals, and detailed description thereof is omitted.

Embodiment 3
The third embodiment relates to a form in which the rotary shaft 31 is screwed with a support portion which is further lower than the yoke 12. FIG. 11 is a schematic perspective view showing the structure of the support portion. A support portion 8 for screwing the rotation shaft 31 is installed at an appropriate position in the housing 5 below the yoke 12. In order to improve the passage of sound in the housing 5, the support portion 8 in the present embodiment extends support rods 81, 81, 81, 81 radially around the screw holes 83, and the end side is the housing. By attaching to the inner peripheral surface of the body 5 by a suitable means, it is set as the shape of the letter X of planar view. The support bar 81 is made of, for example, wood or plastic, and the end of the support bar 81 is fixed by adhesive, screwing, or fitting into the recess 52 that is recessed with the inner peripheral surface of the housing 5. In the present embodiment, a configuration in which the housing 5 is fixed by fitting into the recess 52 will be described.

  A screw hole 83 having the same central axis as the central axis of the inner peripheral surface of the center pole 122 described above, the central axis of the rotation shaft 31, and the central axis of the through shaft 6 is formed in the support portion 8. A screw thread 82 is formed on the inner peripheral surface of the screw hole 83 and is screwed into the screw groove 311 of the rotating shaft 31. The inner peripheral surface radius of the screw hole 83 is substantially the same as the outer diameter of the rotation shaft 31 so that the screw hole 83 can be screwed into the screw groove 311. Ends of the support rods 81, 81, 81, 81 having a rectangular shape in cross section of the support portion 8 having a screw hole 83 in the center are inserted into a recess 52 that is recessed in the inner peripheral surface of the housing 5. The support portion 8 is formed so that the sum of the length in the longitudinal direction of the support rod 81, the diameter of the screw hole 83, and the length in the longitudinal direction of the support rod 81 is longer than the inner peripheral surface diameter of the housing 5. The rod 81 is bent and its tip is inserted into the recess 52.

  FIG. 12 is an exploded perspective view showing a longitudinal section of components constituting the speaker device according to the third embodiment. The difference from the first embodiment is that the above-described support portion 8 is installed on the lower side of the yoke 12, and the rotating shaft 31 and the through shaft 6 are appropriately extended from the first embodiment. Point etc. As shown in FIG. 12, the screw holes 83 are provided with guide grooves 85 and 85 for guiding the guide shafts 71 and 71 of the holding portion 7 from the lower side of the screw holes 83, similarly to the center pole 122 described in the first embodiment. It is formed toward the upper side.

  The outer diameter of the inner peripheral cylinder of the cylindrical center pole 122 is set to be larger than the outer diameter of the rotating shaft 31 on the lower side of the stopper 312 and larger than the outer diameter of the upper side of the stopper 312. In this case, the rotation shaft 31 penetrates without contacting the inner peripheral surface of the center pole 122 of the yoke 12. The lowering is restricted at the position where the rotating shaft 31 is most lowered, that is, when the upper surface 126 of the center pole 122 and the stopper 312 are in contact. The screw hole 83 is formed with the same screw thread 82 as the screw thread 123 of the center pole 122 described in the first embodiment, and is screwed into the screw groove 311 of the rotating shaft 31.

  The threaded portion 64 of the through shaft 6 is screwed into the center hole 72 of the holding portion 7 as in the first embodiment, protrudes from the lower side, and is fixed to the supporting portion 8 by the nut 65. As in the first embodiment, when the rotation shaft 31 is rotated by screwing between the screw thread 82 and the screw groove 311 and the rotation shaft 31 is raised or lowered, the penetrating shaft 6 is inserted into the guide grooves 85 and 85. Through the center shaft 72, the screw portion 64 and the nut 65 by the disk portion 73, and the holding of the convex portion 61 in the step portion 331 without rotating. 6 and the tweeter 2 are raised or lowered in accordance with the raising or lowering of the rotating shaft 31 without rotating. The rotating shaft 31 does not contact the woofer 1 except that the rotating shaft 31 contacts the upper surface 126 of the center pole 122 by the stopper 312. Further, since the penetrating shaft 6 is in contact with the rotating shaft 31 only via the holding portion 7, it is possible to further reduce the influence of vibration on the tweeter 2 of the woofer 1.

  Note that the support portion 8 may be provided at any position inside the housing 5 as long as it is below the yoke 12. In addition to being installed at a substantially central portion in the longitudinal direction of the housing 5 as in the present embodiment, If the length of the body 5 in the longitudinal direction is short, the support portion 8 may be provided near the bottom opening of the housing 5. Moreover, although the support part 8 was comprised by the planar view X-shaped support rod 81, it is not restricted to this form, Other forms may be sufficient if it is a form which can support the tweeter 2. FIG. For example, the support portion 8 may be formed of a lattice-shaped or mesh-shaped disk having a screw hole 83 at the center.

  The third embodiment is configured as described above, and other configurations and operations are the same as those of the first embodiment. Therefore, the corresponding parts are denoted by the same reference numerals, and detailed description thereof is omitted.

It is a typical perspective view which shows the outline | summary of a speaker apparatus. It is a typical perspective view of the speaker apparatus which shows the state which the diffuser raised. It is a typical longitudinal section showing a longitudinal section of a speaker device. It is a perspective view which shows the longitudinal cross-section of a speaker apparatus. It is a disassembled perspective view which shows the longitudinal cross-section of the components which comprise a speaker apparatus. It is a typical longitudinal cross-sectional view which shows the longitudinal cross-section at the time of a speaker apparatus raise. It is a perspective view which shows the longitudinal cross-section at the time of speaker apparatus raise. 6 is a schematic longitudinal sectional view showing a longitudinal section of a speaker device according to Embodiment 2. FIG. 6 is a perspective view showing a longitudinal section of a speaker device according to Embodiment 2. FIG. FIG. 6 is an exploded perspective view showing a longitudinal section of a part constituting the speaker device according to the second embodiment. It is a typical perspective view which shows the structure of a support part. FIG. 6 is an exploded perspective view showing a longitudinal section of a part constituting the speaker device according to Embodiment 3.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Woofer 2 Tweeter 3 Diffuser 4 2nd diffuser 5 Case 6 Through-shaft 7 Holding part 8 Supporting part 11 Diaphragm 12 Yoke 14 Top blade 31 Rotating shaft 32 Diffusion plate 33 Guide cylinder 35 Connection concave 61 Protruding part 62 Tip thread part 64 Screw part 65 Nut 71 Guide shaft 72 Center hole 73 Disk part 74 Guide groove 81 Support rod 82 Screw thread 83 Screw hole 85 Guide groove 121 Bottom plate 122 Center pole 123 Screw thread 124 Screw hole 125 Guide groove 311 Screw groove 312 Stopper 330 Tip surface 331 Step 332 Guide shaft

Claims (10)

In the speaker device in which the first speaker and the second speaker having different sound ranges are arranged on the same axis,
A diffuser for diffusing sound waves from the first speaker;
A cylindrical rotation shaft, one end of which is connected to the diffuser, screwed into the yoke of the first speaker, and rotated together with the diffuser;
The second speaker is attached to one end, and a penetrating shaft that penetrates the inside of the rotating shaft;
A speaker device comprising: a holding portion that holds the other end of the penetrating shaft and the other end of the rotating shaft. A guide groove provided in the yoke;
A guide shaft guided by the guide groove and projecting from the holding portion;
The speaker device according to claim 1, further comprising: a fixing portion that fixes the other end of the through shaft at the holding portion. The pivot axis is
A thread groove screwed into the yoke of the first speaker;
The speaker device according to claim 1, further comprising: a stopper that limits screwing to the yoke. A convex portion projecting in a direction intersecting the axial direction of the penetrating shaft;
The speaker device according to claim 1, further comprising: a step portion provided inside the rotation shaft and in contact with the convex portion. The speaker device according to any one of claims 1 to 4, further comprising a cylindrical body that houses the first speaker. In the speaker device in which the first speaker and the second speaker having different sound ranges are arranged on the same axis,
A cylinder housing the first speaker;
A support section constructed on the cylinder,
A diffuser for diffusing sound waves from the first speaker;
A cylindrical rotation shaft connected at one end to the diffuser, penetrating through the yoke of the first speaker, screwed into the support portion, and rotated together with the diffuser;
The second speaker is attached to one end, and a penetrating shaft that penetrates the inside of the rotating shaft;
A speaker device comprising: a holding portion that holds the other end of the penetrating shaft and the other end of the rotating shaft. A guide groove provided in the support part;
A guide shaft guided by the guide groove and projecting from the holding portion;
The speaker device according to claim 6, further comprising: a fixing portion that fixes the other end of the through shaft at the holding portion. The speaker device according to claim 1, further comprising a second diffuser attached to the diffuser and diffusing sound waves from the second speaker. The first speaker is a bass woofer,
The speaker device according to claim 1, wherein the second speaker is a tweeter for high sounds. The first speaker is provided at one end opening of the cylindrical body,
The speaker device according to any one of claims 1 to 8, wherein the diffuser and the second speaker protrude from one end opening of the cylindrical body.

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