JP5067356B2 - Speaker device - Google Patents

Description

  The present invention relates to a speaker device including a pair of speaker units.

  As one of the speaker units, an electrodynamic device comprising a frame, a diaphragm supported by the frame, and a magnetic circuit for driving the diaphragm in the axial direction of the speaker unit to generate vibrations thereof. There is a speaker device in which a pair of speaker units of this type are arranged on a support such as a baffle plate or a housing at intervals from each other.

  Conventionally, for such a speaker device, in order to reduce deterioration of sound quality caused by vibration in the axial direction of the speaker unit of the magnetic circuit generated along with vibration of the diaphragm of each speaker unit that controls generation of sound waves, It has been proposed to provide a displacement limiting means for limiting the displacement in the axial direction of the magnetic circuit of each speaker unit. This displacement limiting means limits the displacement of the magnetic circuit using the support as a reaction force support (see Patent Document 1 below).

By the way, the restriction of the displacement of the magnetic circuit by the displacement restricting means causes the displacement restricting means itself or the support supporting the deformation to be deformed, and the vibration of the displacement restricting means or the support generated along with the deformation is caused by the speaker unit. There was a problem of adversely affecting the quality of the sound emitted.
Japanese Patent Laid-Open No. 7-30990

  An object of the present invention is to improve sound quality in a speaker device in which means for limiting the displacement of these magnetic circuits is provided for a pair of speaker units.

(Characteristics of the invention described in claim 1)
The invention according to claim 1 relates to a speaker device, a pair of identical speaker units each including a frame, a diaphragm supported by the frame, and a magnetic circuit for generating vibration in the diaphragm, and both speakers A support for supporting the unit, the support having both speaker units oriented in the same direction and spaced apart from each other on the support, and the speaker unit generated in response to vibration of the diaphragm of both speaker units A set of displacement limiting means for limiting the displacements of both magnetic circuits in the axial direction of the pair, the pair of displacement limiting means attached to the support so as to be symmetrical with each other, and both displacement limiting means And a rigid coupling means that extends perpendicularly to the plane of symmetry and that couples both displacement limiting means to each other.

  According to the first aspect of the present invention, the displacement limiting means limits the displacement of the magnetic circuit caused by the vibration of each diaphragm when driving both speaker units oriented in the same direction. By limiting the displacement of the magnetic circuit, the vibration of the frame that supports the magnetic circuit is suppressed, and the deterioration of the quality of sound emitted from each speaker unit is reduced.

  Both displacement limiting means and the support to which they are attached are deformed to counter an external force that causes displacement in the magnetic circuit. These deformations take the same form with respect to the plane of symmetry since both displacement limiting means are arranged symmetrically with respect to each other on the common support. In addition, since both of the displacement limiting means have a rigidity for connecting them and extend perpendicular to the plane of symmetry, the both displacement limiting means are the coupling points of both the displacement limiting means and the coupling means, At the symmetry point, they are pushed or attracted to each other via the coupling means. Along with this, the deformation of both displacement limiting means at the coupling point is canceled out, so that a part of the external force received by the displacement limiting means is consumed. As a result, the degree of deformation of the support is reduced, and deterioration of the quality of sound emitted from each speaker unit is further reduced.

(Features of the invention described in claim 2)
The invention according to claim 2 relates to another speaker device, and, like the invention according to claim 1, includes a frame, a diaphragm supported by the frame, and a magnetic circuit for generating vibration in the diaphragm. A pair of identical speaker units, a support for supporting both speaker units, the support units having both speaker units disposed in the same direction and spaced from each other, and A set of displacement limiting means for limiting the displacement of both magnetic circuits in the axial direction of the speaker unit caused by the vibration of the diaphragm, respectively, which are attached to the support so as to be symmetrical with each other, And a pair of displacement limiting means having a pair of contact parts or common parts in contact with each other.

  According to the second aspect of the invention, as in the first aspect of the invention, the displacement of the magnetic circuit caused by the vibration of each diaphragm when driving both speaker units directed in the same direction is different. Limited by the displacement limiting means. By restricting the displacement of the magnetic circuit, the vibration of the frame supporting the magnetic circuit is reduced and suppressed, and the deterioration of the quality of sound emitted from each speaker unit is reduced.

  As in the first aspect of the invention, both the displacement limiting means and the support to which they are attached are deformed to counter an external force that causes displacement in the magnetic circuit. Since the displacement limiting means are arranged symmetrically with respect to each other on the common support, they have the same form with respect to the symmetry plane. Further, since both the displacement limiting means have a pair of contact portions that are in contact with each other or a common portion common to both of the displacement limiting means, the both displacement limiting means are pushed or attracted to each other at these contact portions, or they are common to each other. It exerts a force to antagonize each other. Accordingly, the deformation of both displacement limiting means in the abutting portion is canceled out, or the deformation in the common portion does not substantially occur, thereby consuming a part of the external force received by the displacement limiting means. Is done. As a result, the degree of deformation of the support, that is, the degree of vibration, and the deterioration of the quality of sound emitted from each speaker unit due to the occurrence of the vibration are further reduced.

(Characteristics of the invention described in claim 3)
The invention according to claim 3 relates to still another speaker device, and includes a pair of identical speaker units each including a frame, a diaphragm supported by the frame, and a magnetic circuit for generating vibration in the diaphragm; A pair of supports for supporting both speaker units, the pair of supports disposed on both supports so that the speaker units face each other or facing each other, and vibrations of the diaphragms of both speaker units A set of displacement limiting means for respectively limiting the displacement of both magnetic circuits in the axial direction of the speaker unit, and a set of displacement limiting means attached to both supports so as to be symmetrical with each other; And a coupling means extending perpendicularly to the symmetry plane of both displacement limiting means and having rigidity for coupling both displacement limiting means to each other.

  According to the third aspect of the present invention, displacement of the magnetic circuit caused by vibration of each diaphragm during driving of the speaker units supported by both supports and facing or facing each other is each displacement limiting means. Limited by. By restricting the displacement of the magnetic circuit, the vibration of the frame supporting the magnetic circuit is reduced and suppressed, and the deterioration of the quality of sound emitted from each speaker unit is reduced.

  Each displacement limiting means and each support to which it is attached deforms to counteract external forces that cause displacement in the magnetic circuit. These deformations take the same form with respect to the plane of symmetry, since the two speaker units are arranged so as to face or face each other on both supports and the two displacement limiting means are arranged symmetrically with respect to each other. In addition, since both of the displacement limiting means have a rigidity for connecting them and extend perpendicular to the plane of symmetry, the both displacement limiting means are the coupling points of both the displacement limiting means and the coupling means, At the symmetry point, they are pushed or attracted to each other via the coupling means. Along with this, the deformation of both displacement limiting means at the coupling point is canceled out, so that a part of the external force received by the displacement limiting means is consumed. As a result, the degree of deformation of each support body is reduced, and deterioration of the quality of sound emitted from each speaker unit is further reduced.

(Characteristic of the invention described in claim 4)
According to a fourth aspect of the present invention, in addition to including the constituent elements of the first or third aspect of the invention, the coupling means is composed of one or a plurality of rod-shaped members.

  According to the fourth aspect of the present invention, it is possible to transmit the deformation restraining forces respectively generated in the two displacement limiting means to the other one of the displacement limiting means via the rod-like member.

(Characteristics of the invention described in claim 5)
According to a fifth aspect of the present invention, there is provided a support member in which each displacement limiting means is fixed to a support body of each speaker unit, including the constituent elements of the first aspect of the present invention. And a pressing member that is supported by the support member and presses the magnetic circuit of each speaker unit in the axial direction of each speaker unit.

  According to invention of Claim 5, the displacement to the axial direction of the said speaker unit which arises in the said magnetic circuit is restrict | limited by the said press member. At this time, the reaction force of the pressing member against the magnetic circuit is borne by the support via the support member that supports the pressing force. Further, the pressing force (preload) exerted on the magnetic circuit by the pressing member limits the magnitude of displacement that can be generated in the magnetic circuit to a smaller value.

(Characteristic of the invention described in claim 6)
According to a sixth aspect of the present invention, the components of the invention according to the first or second aspect of the invention are provided, and each of the support members of the speaker units is made of a baffle plate or a casing.

  According to the sixth aspect of the present invention, in the speaker device in which both speaker units are supported by the baffle plate or the housing, it is possible to reduce deterioration in sound quality.

(Characteristics of the invention described in claim 7)
The invention according to claim 7 is characterized in that each of the support members of both speaker units is made of a baffle plate, in addition to the constituent elements of the invention according to claim 3.

  According to the seventh aspect of the present invention, in the speaker device in which both speaker units are respectively supported by the pair of baffle plates, it is possible to reduce deterioration in sound quality.

(Characteristic of the invention described in claim 8)
The invention described in claim 8 is characterized by comprising the constituent elements of the invention described in claim 1 or 2 and further comprising a set of deformation limiting means. The both deformation limiting means limit the deformation of the support body in the axial direction of the speaker unit caused by the vibration of the diaphragms of both speaker units, and the support body is symmetrical with respect to the symmetry plane with respect to each other. And a pair of abutting portions or common portions that are in contact with each other.

  According to the eighth aspect of the present invention, both deformation limiting means are deformed to counteract deformation of the support to which they are attached, and limit deformation of the support. The deformations of both deformation limiting means are arranged in plane symmetry with respect to the support common to them, and therefore have the same form with respect to the plane of symmetry. In addition, since both deformation limiting means have a pair of contact parts or common parts that are in contact with each other, the two deformation restriction means push or attract each other at these contact parts, or force that mutually antagonizes at these common parts. Give each other up. Accordingly, the deformation of both deformation limiting means at the abutting portion is canceled out, or the deformation at the common portion does not substantially occur, so that one of the external forces that the deformation limiting means receives from the support body. Parts are consumed. As a result, the degree of deformation of the support, that is, the degree of vibration, and the deterioration of the quality of sound emitted from each speaker unit due to the occurrence of the vibration are further reduced.

(Characteristic of the invention described in claim 9)
The invention according to claim 9 is a pair of identical speaker units each having a frame, a diaphragm supported by the frame, and a magnetic circuit for generating vibration in the diaphragm, and a support for supporting both speaker units. A support body in which both speaker units are arranged in opposite directions and spaced apart from each other, and both magnetic circuits in the axial direction of the speaker unit that are generated in accordance with vibrations of diaphragms of both speaker units A set of displacement limiting means for limiting each of the displacements, and a set of displacement limiting means attached to the support so as to be point-symmetric with each other.

  According to the ninth aspect of the present invention, both speaker units are supported on one support body in opposite directions, and both speaker units are driven in a so-called opposite phase. Both displacement limiting means limit the displacement of the magnetic circuit caused by the vibration of each diaphragm when driving both speaker units. By restricting the displacement of the magnetic circuit, the vibration of the frame supporting the magnetic circuit is reduced and suppressed, and the deterioration of the quality of sound emitted from each speaker unit is reduced.

  Further, both the displacement limiting means and the support to which they are attached are deformed to counter an external force that causes displacement in the magnetic circuit. Because of the symmetrical arrangement, the deformation of the one displacement limiting means and the support caused by driving one speaker unit (deformation A) is the same as that of the other displacement limiting means and the support. At the same time, the deformation of the other displacement limiting means and the deformation of the supporting body (deformation B) caused by driving the other speaker unit is the same as that of the one displacement limiting means and the supporting body. The deformation B of FIG. Here, since both the speaker units are driven in opposite phases, the deformation A and the deformation B are in a form in which the deformations are opposite to each other, that is, in the opposite form. For this reason, one displacement limiting means and the deformation A of the support due to the drive of one speaker unit are canceled out by one displacement limiting means and the deformation B of the support due to the driving of the other speaker unit. Further, the other displacement limiting means and the deformation B of the support due to the drive of the other speaker unit are canceled by the one displacement limiting means and the deformation A of the support due to the driving of the one speaker unit. . As a result, most of the external force received by both displacement limiting means is consumed as thermal energy. As a result, the degree of deformation of the support, that is, the degree of vibration, and the deterioration of the quality of sound emitted from each speaker unit due to the occurrence of the vibration are further reduced.

(Characteristics of the invention described in claim 10)
The invention according to claim 10 is provided with the constituent elements of the invention according to claim 9, and further, the support body in the axial direction of the speaker unit that is caused by the vibration of the diaphragms of both speaker units. A pair of deformation limiting means for limiting the deformation of the first and second deformation limiting means, which are attached to the support so as to be point-symmetric with respect to the center of point symmetry.

  According to the invention described in claim 10, both deformation limiting means function in the same manner as the displacement limiting means, and limit deformation of the support. That is, both deformation limiting means are deformed to counteract external forces that cause displacement of the support to which they are attached, and both deformation limiting means are arranged symmetrically with respect to each other on the common support. Therefore, deformation of one of the speaker units and deformation of the support (deformation C) for one speaker unit results in deformation (deformation C) of the same form with respect to the other deformation restriction and the support. At the same time, deformation of the other deformation limiting unit and deformation of the support (deformation D) for the other speaker unit results in deformation (deformation D) of the same form with respect to the one deformation limiting unit and the support. Here, since both the speaker units are driven in opposite phases, the deformation C and the deformation D take the opposite form. For this reason, one deformation limiting means and the deformation C of the support due to the drive of one speaker unit are canceled by one deformation limiting means and the deformation D of the support due to the driving of the other speaker unit. And the deformation D of the other deformation caused by the drive of the other speaker unit and the deformation D of the support are canceled out by the deformation restriction of the one deformation caused by the drive of the one speaker unit and the deformation C of the support. . As a result, most of the external force received by both deformation limiting means is consumed. As a result, the degree of deformation of the support, that is, the degree of vibration, and the deterioration of the quality of sound emitted from each speaker unit due to the occurrence of the vibration are further reduced.

(Characteristics of Invention of Claim 11)
The invention according to claim 11 is provided with the components of the invention according to any one of claims 8 to 10, and each displacement limiting means is a support member fixed to the support body of each speaker unit. And a pressing member that is supported by the support member and presses the magnetic circuit of each speaker unit in the axial direction of each speaker unit.

  According to the eleventh aspect of the invention, as in the fifth aspect, the displacement in the axial direction of the speaker unit that occurs in the magnetic circuit is limited by the pressing member. At this time, the reaction force of the pressing member against the magnetic circuit is borne by the support via the support member that supports the pressing force. Further, the pressing force (preload) exerted on the magnetic circuit by the pressing member limits the magnitude of displacement that can be generated in the magnetic circuit to a smaller value.

(Characteristic of the invention described in claim 12)
The invention described in claim 12 includes the constituent elements of the invention described in any one of claims 8 to 11, and each deformation limiting means includes a support member fixed to the support, And a pressing member that is supported by a supporting member and presses the supporting body in the axial direction of each speaker unit.

  According to invention of Claim 12, the displacement which arises in the said support body is restrict | limited by the said press member. At this time, the reaction force of the pressing member against the support body is borne by the support body via the support member that supports the reaction force. Further, the pressing force (preload) exerted on the support by the pressing member limits the magnitude of displacement that can be generated on the support to a smaller value.

  According to the present invention, the deformation of both displacement limiting means of the speaker device provided with the displacement limiting means for limiting the displacement of these magnetic circuits for the pair of speaker units cancels each other, or further the support for the speaker unit By suppressing the deformation of the support by means for limiting the deformation of the sound, the deformation of the support is suppressed, and the deterioration of the quality of the sound emitted from each speaker unit is further reduced, thereby improving the sound quality. be able to.

  Referring to FIG. 1, a loudspeaker apparatus according to an embodiment of the present invention is indicated generally by the reference numeral 1. The speaker device 1 includes a pair of speaker units 3 and a support 5 that supports both speakers 3. Both loudspeakers 3 are attached to and supported by the support 5 in the same direction (leftward in FIG. 1) and spaced from each other (spaced in the vertical direction in FIG. 1).

  Both speaker units 3 are the same. That is, both speaker units 3 are the same in all types, sizes, performances, and the like. Each speaker unit 3 belongs to a type called an electrodynamic type, and includes a frame 7 having a bowl shape as a whole, and a diaphragm 9 and a magnetic circuit 11 respectively supported by the frame 7. Both speaker units 3 are driven in a so-called same phase under the action of the magnetic circuit 11. That is, the diaphragms 9 of both speaker units 3 vibrate the same amount of displacement in the same direction with respect to the axis L of both speaker units 3, and both speaker units 3, more specifically both diaphragms 9 Sound is emitted toward the front in the direction of the axis L (leftward in FIG. 1).

  In the illustrated example, the support 5 of the speaker unit 3 is formed of a hermetically sealed casing. The speaker unit 3 extends through and is fixed to the outer wall defining the front surface (the left surface in FIG. 1) of the housing through the frame 7, and the diaphragm 9 is attached to the housing. The magnetic circuit 11 is located inside the housing. The support 5 may be, for example, a bass reflex type housing, a baffle plate, a bent baffle plate, a rear open baffle plate or the like (not shown) instead of the hermetic type housing.

  The speaker device 1 includes a displacement limiting means 13 for limiting the displacement of the magnetic circuit 11 that causes the deterioration of the quality of sound emitted from the speaker device. The displacement of the magnetic circuit 11 is caused by vibrating in the direction of the axis L together with the frame 7 under the influence of the vibration of the diaphragm 9 when each speaker unit 3 is driven. The displacement limiting means 13 can be composed of a supporting member 15 and a pressing member that is supported by the supporting member and exerts a pressing action on the magnetic circuit 11, for example, a bolt 17.

  The support member 15 of the displacement limiting means 13 is formed by bending a band-shaped metal plate having relatively high rigidity into a U-shape as a whole, and is connected to a pair of parallel side portions 19 facing each other and both side portions 19. It has the bottom part 21 orthogonal and the open top part 23 facing this bottom part. The support member 15 also has a pair of flange portions 25 extending perpendicularly from the tips of the side portions 19 and substantially defining an open top portion 23.

  The support member 15 surrounds the frame 7 and the magnetic circuit 11 of the speaker unit 3 behind them (rightward in FIG. 1). More specifically, the two flange portions 25 of the support member 15 are disposed so as to be positioned above and below the speaker unit 3 and are disposed so as to face the inner wall of the housing, and are fixed to the housing. The portion 19 and the bottom portion 21 surround the periphery of the speaker unit 3 with a space between the frame 7 and the magnetic circuit 11. Thereby, the support body 5 and the support member 15 prescribe | regulate the rectangular planar shape as a whole.

  The bolt 17 is screwed to the bottom portion 21 of the support member 15 in the middle in the length direction thereof, extends on the axis L of the speaker unit 3 toward the magnetic circuit 11 and is in contact with the magnetic circuit. When the magnetic circuit 11 vibrates in the direction of the axis L as the speaker unit 3 is driven, the bolt 17 that is in contact with the magnetic circuit 11 has the support member 15 as a reaction force support and the magnetic circuit 11 is on the axis L. , And more specifically, it stops or restricts the magnetic circuit 11 from being displaced in one direction toward the bottom 21 of the support member 15. As a result, vibrations of the magnetic circuit 11 and the frame 7 that supports the magnetic circuit 11 are suppressed, and deterioration of sound quality in the speaker device 1 can be reduced. In addition, it is possible to connect the front-end | tip part which contact | connects the magnetic circuit 11 of the volt | bolt 17 with respect to the magnetic circuit 11 so that rotation around the axis line L is possible. According to this, the displacement of the magnetic circuit 11 can be limited not only in the one direction of the axis L but also in another direction (opposite direction).

  Further, the bolt 17 screwed into the bottom portion 21 of the support member 15 can be rotated to change the screwing position of the support member 15 with respect to the bottom portion 21 and advance toward the magnetic circuit 11, whereby the bolt A compression force (pressing force) can be applied in the direction of the axis L to the magnetic circuit 11 and the frame 7 via 17. By placing both the magnetic circuit 11 and the frame 7 in a compressed state, the range in which they can vibrate, that is, the magnitude of the displacement of the magnetic circuit 11 can be made smaller. The vibration suppression of both of the frames 4 is further promoted, and the sound quality deterioration is further reduced. Note that the support member 15 that supports the bolt 17 may have another bent shape such as a semicircular shape instead of the U-shaped bent shape shown in the figure. Further, instead of the illustrated example in which both support members 15 have the same size, one of them can be larger or smaller than the other one. However, in this case, since the areas of the parts that are pressed or attracted to each other are different, the degree of displacement restriction is inferior to that of the same size in which such differences do not occur.

  By the way, when the bolt 17 restricts the displacement of the magnetic circuit 11, that is, when the bolt 17 receives an external force from the vibrating magnetic circuit 11 and exerts a reaction force against it against the magnetic circuit 11, a support for supporting the bolt 17. The member 15 is flexed or deformed at every moment. This modification is the same because both support members 15 have the same shape and are supported by the support 5 in the same manner with respect to the same speaker unit 3 in the illustrated example. Further, the influence of the deformation generated in the support member 15 extends to the support body 5 in an integral relationship with the support member 15, and as a result, the support body 5 is bent or deformed, that is, vibrated. The vibration of the support 5 also adversely affects the sound quality of the speaker device 1 and causes it to deteriorate.

  In the present invention, both displacement limiting means 13 are arranged symmetrically with respect to a plane (symmetric plane) S perpendicular to the front surface of the casing constituting the support 5, that is, so as to be plane symmetric. The two speaker units 3 are also arranged symmetrically with respect to the symmetry plane S, that is, symmetrically with respect to the plane. For example, the side 19 of one (upper) support member 15 and the other (lower) support member facing the side 19 are the same in the form or mode of deformation that occurs in both support members 15. Focusing on the 15 side portions 19, the upper and lower side portions 19 facing each other are simultaneously convex or concave toward the other side portion 19 at a point that is equidistant with respect to the symmetry plane S, that is, a symmetry point. To the same deformation.

  In the present invention, both displacement limiting means 13 are further coupled to each other via a coupling means 27 having rigidity. In the example shown in FIG. 1, the coupling means 27 includes three rod-shaped members 29 made of, for example, steel. Each rod-shaped member 29 extends between the support members 15 perpendicular to the symmetry plane S, and is fixed to both side portions 19 of the support members 15 opposite to each other at both ends thereof. The number of the rod-shaped members 29 can be one or any plural number. Further, the coupling means 13 may be composed of, for example, one or a plurality of plate-like members (not shown), blocks (not shown), etc. instead of using the rod-like members.

  Each bar-shaped member 29 extends perpendicularly to the plane of symmetry S, and both fixing portions or coupling sites 31 for both support members 15 at both ends thereof are on the symmetry point, and each bar-shaped member 29 is rigid as described above. Have For these reasons, the opposite side portions 19 of the two support members 15 are pressed or attracted to each other via the respective rod-shaped members 29 at the joint portions 31 with the respective rod-shaped members 29 at the time of deformation. As a result, these deformations are canceled at both side portions 19, that is, a part of both support members 15, whereby a part of the external force from the magnetic circuit 11 that causes these deformations is converted into heat energy and consumed. The As a result, the degree of deformation of the support 5 caused by the deformation of both support members 15 can be made smaller, and the adverse effect on the sound quality of the speaker device 1 can be further reduced.

  Reduction of deformation in both displacement limiting means 13 arranged symmetrically with respect to the symmetry plane S can also be achieved by making both displacement limiting means 13 contact each other as shown in FIG.

  In the example shown in FIG. 2, the upper and lower opposite side portions 19 of the support members 15 form contact portions with respect to each other and are fixed to each other. According to this, when the same deformation | transformation arises in both the supporting members 15, the mutually opposing both sides 19 mutually press or attract each other in these contact parts. Thereby, the deformation of both side portions 19 is canceled out. The both side portions 19 can be fixed by, for example, mutual fastening using bolts and nuts, mutual adhesion by using an adhesive, or the like. Further, the both side portions 19 may simply contact each other without fixing the both side portions 19. However, in this case, when the same deformation occurs in both the support members 15, the deformation of the side portions 19 is canceled only when the opposite side portions 19 press against each other at these contact portions.

  3 and 4 show a speaker device 1 according to still another example. In the speaker device 1 of this example, a pair of identical speaker units (speaker units positioned above in FIG. 3) (hereinafter referred to as “upper speaker units”) 3 are respectively supported by a pair of support bodies 5. These diaphragms 9 face each other. Further, on both supports 5, a pair of identical speaker units (positioned downward as viewed in FIG. 3) are arranged so that these diaphragms 9 face each other, that is, both magnetic circuits 11 face each other. Speaker unit) (hereinafter referred to as “upper speaker unit”) 3 is supported. Both supports 5 are each made of a baffle plate, and are arranged in parallel with a distance from each other. As for the upper speaker unit 3 and the lower speaker unit 3, as long as the upper speaker units 3 are the same and the lower speaker units 3 are the same, the upper speaker unit 3 and the lower speaker unit 3 are the same. And may be different from each other.

  The upper speaker units 3 have a common axis L (FIG. 4) extending horizontally, and the lower speaker units 3 also have a common axis (not shown) extending horizontally. The pair of upper speaker units 3 and the pair of lower speaker units 3 are arranged symmetrically with respect to a common symmetry plane S (FIG. 4) orthogonal to both axes of the pair of speaker units. Reference numerals 33 and 35 denote two pairs of acoustic reflectors that are selectively attached to both supports 5.

  Also in the speaker device 1 shown in FIG. 3 and FIG. 4, the displacement limiting means 13 composed of the support member 15 and the bolt 17 which is the pressing member are applied to each pair of the speaker units 3. A member 15 is attached to each support 5. However, in this example, both flange portions 25 that are attachment portions of the support member 15 to the support 5 extend toward the other in the example shown in FIGS. The other side extends in the opposite direction. The displacement limiting means 13 applied to the upper speaker units 3 and the displacement limiting means 13 applied to the lower speaker units 3 are also symmetrical with respect to the symmetry plane S.

  Further, also in the speaker device 1 shown in FIGS. 3 and 4, the two displacement limiting means 13 for the upper speaker units 3 are coupled to each other by the coupling means 27 similar to that described above perpendicular to the symmetry plane S, Further, the two displacement limiting means 13 for the lower speaker units 3 are coupled to each other by the coupling means 27 similar to the above described orthogonal to the symmetry plane S.

  More specifically, the coupling means 27 includes a plurality of rod-like members 29 similar to those described above. Both displacement limiting means 13 for the upper speaker units 3 are coupled to each other by two rod-shaped members 29 at both flange portions 25 of both support members 15 constituting the displacement limiting means. Further, the two displacement limiting means 13 for the lower speaker units 3 are plural (four in the illustrated example) and 2 at the bottom 21 and the two flanges 25 of the two support members 15 constituting the displacement limiting means. The rod-shaped members 29 are connected to each other. In the illustrated example, each rod-shaped member 29 that mutually couples the supporting members 15 at the flange portions 25 has both ends extending through the support body 5 and the flange portions 25 and nuts at both ends. 37 is screwed, and further has a function of fixing the support member 15 to the support body 5 and a function of a spacer for maintaining the mutual distance between the support bodies 5.

  In the example of the speaker device 1 shown in FIG. 3 and FIG. 4, both the upper speaker units 3 facing each other and the lower speaker units 3 facing each other are supported by both supports 5. As another example of the speaker device 1 in place of this example, only the opposing speaker units 3 are supported by the support members 5 or only the facing speaker units 3 are respectively supported by the support members 5. It can be supported.

  From the above, in the example of the speaker device 1 shown in FIGS. 3 and 4, the deformation of the support 5 caused by the deformation of the both support members 15 is substantially the same as in the speaker device 1 shown in FIG. 1. And the adverse effect on the sound quality of the speaker device 1 is further reduced.

  Specifically, when both pairs of speaker units 3 are driven in the same phase, both support members 15 applied to the upper speaker units 3 are mutually coupled by the rod-shaped member 29 when they are deformed. In addition, in each of these flange portions 25, they are pressed against or attracted to each other via the rod-shaped member 29. As a result, the deformation of both flange portions 25 and the deformation of both support bodies 5 at the fixed portions of the flange portions are offset. In the example shown in FIG. 3 and FIG. 4, in order to cancel both deformations that are plane-symmetric with each other and that occur in both support bodies 5 around the fixing portion of the flange portion 25 that is affected by the deformation of both flange portions 25. Above and below both speaker units 3, both supports 5 are connected to each other by two other rod-shaped members 39. The rod-shaped member 39 is made of a material having rigidity similar to the rod-shaped member 29, and extends between the supports 5 perpendicular to the symmetry plane S. When deformation occurs in both the supports 5, they are pressed against or attracted to each other via the rod-shaped member 39 at the joint portion between these and the rod-shaped member 39.

  Further, the two support members 15 applied to the two oppositely opposite units 3 are deformed via the rod-like members 29 at the flange portions 25 and the bottom portion 21 mutually connected by the rod-like members 29 when they are deformed. Push or pull each other. As a result, the deformation of both flange portions 25 and both bottom portions 21 is offset. Further, in order to cancel out the deformation of both supports 5 caused by the deformation of both support members 15, the other two rod-shaped members are positioned at the lower position of the lower speaker 3 in the same manner as described above. They are connected to each other through 39. Reference numeral 41 denotes a connecting rod for connecting the acoustic reflectors 33 and 35 facing each other.

  As shown in FIG. 5, the present invention can be similarly applied to three or more identical speaker units 3 oriented in the same direction. In the example shown in FIG. 5, four speaker units 3 are arranged at equal intervals in the vertical direction and supported by a support body 5 made of a single flat baffle plate. As described above, the displacement limiting means 13 is applied to each speaker unit 3. In this example, as in the example shown in FIG. 2, in each pair of displacement limiting means 13 applied to each pair (three in total) of speaker units 3 that are vertically symmetrical and are adjacent to each other in the vertical direction, Both side portions 19 which are adjacent to each other in the vertical direction are in contact with each other.

  As another example of the support 5 for supporting three or more speaker units 3, a sealed casing as shown in FIG. 6 or a baffle plate having a fan-like planar shape as shown in FIG. Can do. Further, the three or more speaker units 3 can be arranged so as to be aligned in any direction other than the vertical direction.

  Further, instead of disposing the opposing side portions 19 of each pair of adjacent displacement restricting means 13 so as to contact each other, the side portions 19 are replaced with one or more rod-shaped members 29 as in the example shown in FIG. You may couple | bond together via the coupling means 27 which consists of (not shown).

  The speaker device 1 further restricts deformation of the support 5 in addition to a set of displacement limiting means 13 (FIG. 8) that are symmetrical with each other for limiting the displacement of the magnetic circuit 11 of both speaker units 3. It is possible to have a set of deformation limiting means 43 (FIG. 9).

  Both deformation limiting means 43 are arranged so as to be plane-symmetric with respect to the symmetry plane S of both displacement limiting means 13, and the speaker generated by the vibration of the diaphragm 9 of both speaker units 3 and the deformation of the displacement limiting means 13. It acts to limit the deformation of the support 5 in the axial direction of the unit. In the example shown in FIGS. 8 and 9, both displacement limiting means 13 have substantially the same configuration as in the example shown in FIG. 2 except for the points described below, and also have the same operational effects.

  That is, in this example, the support body 5 that supports the pair of speaker units 3 is disposed in the frame 45 and supported by the frame 45. The frame 45 is formed of angle steel extending along each ridgeline of the virtual rectangular parallelepiped, and has six open surfaces 47 and 49, which are six rectangular open surfaces, upper and lower open surfaces 51 and 53, and both side surfaces. Open surfaces 55 and 57 are provided.

  The support body 5 is formed of a rectangular baffle plate, and is disposed at an intermediate position between the two open surfaces 47 and 49 of the frame 45 in parallel with each other and extends in the vertical direction. The support 5 is also fixed to each part of the frame 45 that defines the open surfaces 47 to 57 using, for example, bolts (not shown). As in the example shown in FIG. 1 or FIG. 2, a pair of speaker units 3 are vertically arranged on the support 5 with a space therebetween, and these diaphragms 9 face the open front surface 47 of the frame 45, Further, the magnetic circuit 11 faces the open back surface 49 of the frame 45.

  In this example, as shown in FIG. 8, a pair of support members 15 that respectively support both bolts 17 that are both pressing members constituting both displacement limiting means 13 include four strip-like plates 59 made of steel, 61, 63, 65, that is, a belt-like plate (vertical plate) 59 extending in the vertical direction, a belt-like plate (upper horizontal plate) 61 at the uppermost position extending perpendicularly and horizontally to the vertical plate, and the horizontal plate A belt-like plate (intermediate horizontal plate) 63 at a lower position and extending in parallel therewith, and a belt-like plate (lower horizontal plate) 65 at a lowermost position and extending in parallel with both horizontal plates 61, 63; It is formed by.

  That is, an upper horizontal plate 61 (more precisely, a half length portion 61A) extending across the open upper surface 51 of the frame 45 and a vertical plate 59 (more accurately, its half length) The upper half length portion 59 </ b> A) and the intermediate horizontal plate 63 form a U-shaped support member 15 that forms part of the upper displacement limiting means 13. Further, the intermediate horizontal plate 63, the vertical plate 59 (more precisely, the lower half length portion 59B), and the lower horizontal plate 65 (more precisely, the half length) extending across the open lower surface 53. The portion 65 </ b> A) forms a U-shaped support member 15 that forms part of the lower displacement limiting means 13. Bolts 17 that are pressing members of the displacement limiting means 13 are screwed into the vertical plate 59, extend toward the magnetic circuit 11 of each speaker unit 3, and press the magnetic circuit.

  In the example shown in FIGS. 8 and 9, the upper half portion 59 </ b> A and the lower half portion 59 </ b> B of the vertical plate 59 constitute both support members 15, and the intermediate horizontal plate 63 constitutes both support members 15. It forms a common part. Instead of the single vertical plate 59, it can be composed of two independent upper and lower belt-like plates. Further, instead of the single intermediate horizontal plate 63, it may be composed of two belt-like plates that are overlapped with each other or further fixed to each other. It forms a pair of abutting portions in contact with each other in the displacement limiting means 13.

  The vertical plate 59 is disposed at a position that bisects the open back surface 49 of the frame 45 in the horizontal direction, and is fixed to the upper and lower portions of the frame 45 that defines the open back surface 49 of the frame 45 by bolts 67 at both ends thereof. It is opposed to the magnetic circuit 11 of both speaker units 3. The vertical plate 59 is further fixed to the pair of horizontal members 69 by bolts 71. Both lateral members 69 are each made of angle steel fixed to the frame 45 and extending in the horizontal direction. Both lateral members 69 are in a position that bisects the open back surface 49 of the frame 45 in the vertical direction, and are fixed to both side portions of the frame 45 that define the open back surface 49 by bolts (not shown) at both ends thereof.

  The upper horizontal plate 61 is disposed at a position that bisects the open upper surface 51 of the frame 45 in the horizontal direction, and is fixed to the upper portion of the frame 45 that defines the open upper surface 51 by bolts 73 at both ends thereof. As a result, the upper horizontal plate 61 is connected and fixed to the vertical plate 59 via the frame 45. The upper horizontal plate 61 is further fixed to the support 5 with bolts 75 at the top of the support. As a result, the support member 15 in the upper displacement limiting means 13 is fixed to the support 5 at one of its both ends.

  The lower horizontal plate 65 is also in the same manner as the upper horizontal plate 61. That is, the lower horizontal plate 65 is arranged at a position that bisects the open lower surface 53 of the frame 45 in the horizontal direction, and at both ends thereof, bolts (see FIG. (Not shown). Thereby, the lower horizontal plate 65 is connected and fixed to the vertical plate 59 via the frame 45. The lower horizontal plate 65 is also fixed to the support 5 with bolts (not shown) at the bottom of the support. Thereby, the supporting member 15 in the lower displacement restricting means 13 is fixed to the supporting body 5 at one of both end portions thereof.

  Further, the intermediate horizontal plate 63 is on the symmetry plane S with respect to the both displacement limiting means 13, and is disposed and supported so as to face both the horizontal members 69 fixed to the frame 45 and these horizontal members 69. The body 5 is fixed to a pair of other lateral members 79 fixed by a plurality of bolts (however, typically only one bolt is shown) 77. More specifically, the intermediate horizontal plate 63 is sandwiched between both lateral members 69 and both lateral members 79 at both ends, and is fixed to these lateral members 69 and 79 by bolts 81. Thereby, the intermediate horizontal plate 63 is connected to and fixed to the vertical plate 59 via the frame 45. Thereby, both the supporting members 15 in the both displacement limiting means 13 are fixed to the supporting body 5 at the other one of these both end portions. The horizontal member 69 and the horizontal member 79 also reinforce both the support member 15 and the support body 5, respectively, and contribute to maintaining these forms.

  In both displacement limiting means 13 shown in FIG. 8 and FIG. 9, both supports that occur when both speaker units 3 are driven in the same phase and the magnetic circuits 11 of both speaker units 3 vibrate in their axial directions, respectively. The deformation of the member 15 or the cancellation or antagonism of the external force that causes the deformation occurs in the intermediate horizontal plate 63 that forms a common part of the two support members 15 and is consumed as thermal energy in the horizontal plate 63.

  Next, as shown in FIG. 9, both deformation limiting means 43 for limiting the deformation of the support 5 are respectively located on the front side or the front side of the support 5 as described above. They are mounted so as to be symmetrical with each other with respect to the symmetry plane S, and are opposed to both displacement limiting means 13 on the back side or the rear side of the support 5. Both deformation limiting means 43 include a pair of U-shaped support members 83 having the same structure as the pair of support members 15 in both displacement limit means 13, and are a pair of upper and lower pressing members supported by each support member 83. A certain pair of bolts 85 are provided.

  The pair of upper support members 83 includes an upper horizontal plate 61 (more precisely, the remaining half 61B) and a belt-like plate (vertical plate) 87 (more precisely, extending vertically from the open front surface 47 of the frame 45). Two upper and lower portions 87A and 87B), a lower horizontal plate 65 (more precisely, the remaining half portion 65B), and a belt-like plate extending in parallel with and between the upper and lower horizontal plates 61 and 65. (Intermediate horizontal plate) 89.

  The vertical plate 87 corresponds to the vertical plate 59 of the displacement limiting means 13 and is opposed thereto. Similarly to the vertical plate 59, the vertical plate 87 is arranged at a position that bisects the open front surface 47 of the frame 45 in the horizontal direction, and at both ends thereof, on the upper and lower portions of the frame 45 that defines the open front surface 47 of the frame 45. It is fixed by a bolt 91 and is opposed to the diaphragm 9 of both speaker units 3. The vertical plate 87 is further fixed to the pair of horizontal members 93 by bolts 95. Both lateral members 93 are each made of angle steel fixed to the frame 45 and extending in the horizontal direction, and correspond to both lateral members 69 on the back side. Both lateral members 93 are in a position that bisects the open front surface 47 of the frame 45 in the vertical direction, and are fixed to both sides of the frame 45 defining the open front surface 47 by bolts (not shown) at both ends thereof.

  The intermediate horizontal plate 89 corresponds to the intermediate horizontal plate 63 in the displacement limiting means 13 and is opposed thereto. Further, the intermediate horizontal plate 89 is on the symmetry plane S, is arranged so as to face both the horizontal members 93 fixed to the frame 45, and these horizontal members 93, and a plurality of bolts ( However, typically only one bolt is shown.) It is fixed to a pair of other transverse members 99 fixed via 97. More specifically, the intermediate lateral plate 63 is sandwiched between the lateral members 93 and the lateral members 99 at both ends, and is fixed to the lateral members 93 and 99 with bolts 101. Thereby, the intermediate horizontal plate 89 is connected to and fixed to the vertical plate 87 via the frame 45. Thereby, both the supporting members 83 in the both deformation limiting means 43 are fixed to the supporting body 5 at the other one of these both end portions. The transverse members 93 and 99 also reinforce both the support members 83 and the support body 5 and contribute to enhancing their deformation resistance or shape maintenance.

  Each pair of bolts 85, which are each pair of pressing members, are arranged vertically spaced from each other and screwed into the vertical plate 87, and are directed toward the upper and lower positions of each speaker unit 3. These tips extend in parallel with the axis of these, and their tips are in contact with the support 5. As a result, the bending or deformation (vibration) of the support 5 caused by the vibration of the frame 7 or the magnetic circuit 11 of the speaker unit 3 is limited, and the sound quality of the speaker unit 3 can be reduced based on the occurrence of the vibration. It has been.

  Preferably, like the bolts 17 in the displacement limiting means 13, each pair of bolts 85 is rotated around these axes to advance the screwing position with respect to the vertical plate 87, whereby each pair of bolts 85 is moved to the vertical plate. 87, that is, each support member 83 is used as a reaction force support, and a pressing force (preload) is applied to the support 5. As a result, the range in which the support 5 can be deformed or bent (vibrated) is narrowed, and the sound quality of the speaker unit 3 based on the occurrence of the vibration can be further reduced.

  The two deformation limiting means 43 of the support 5 further deforms so that the support 5 bends toward the two halves 87A and 87B of the vertical plate 87, and accordingly, the two support members 83 are symmetrical with each other. When deformation occurs, the external force causing the deformation antagonizes each other in the intermediate horizontal plate 89 constituting the common part of the two support members 83 and is consumed as heat energy. When the intermediate horizontal plate 89 is composed of a pair of plates that are in contact with each other and the plates constitute a pair of contact portions of the deformation limiting means 43 that are in contact with each other, the plates are pressed against each other, or the plates are fixed to each other. If they are, they attract each other and the external force is consumed. In addition, like the bolt 17 in the displacement limiting means 13, the tip of the deformation limiting means 43 that contacts the support 5 of each bolt 85 may be connected to the support 5 so as to be rotatable around the axis of the bolt. Is possible. According to this, the deformation of the support body 5 can be restricted in both directions of the axis of the bolt.

  Next, referring to FIG. 10, a speaker device 1 according to another example of the present invention is shown. Unlike the speaker device 1 shown in FIGS. 1 to 9, this speaker device has a pair of identical speaker units 3 supported by a support 5 made of a baffle plate, facing in opposite directions and spaced from each other. (In the example shown in the figure, they are arranged at intervals in the vertical direction). Both speakers are driven in a so-called opposite phase. That is, the diaphragms 9 of both speaker units 3 vibrate the same amount of displacement in opposite directions with respect to the axis L of both speaker units 3, and both speaker units 3, more specifically, both diaphragms 9, respectively. Sound is emitted forward and backward in the direction.

  As shown in FIG. 10, the support 5 is supported by the same frame 45 as in FIGS. The frame 45 is not provided with a pair of reinforcing plates 103, but further provided with two pairs of reinforcing plates 105, and supports the constituent members of the supporting member 15 of the displacement limiting means 13 and the deformation limiting means 43 as will be described later. Except for the slight difference between the constituent members of the member 83, it is the same as in the example shown in FIGS.

  The speaker device 1 shown in FIG. 10 has a set of displacement limiting means 13 and a set of deformation limiting means 43 similar to those shown in FIGS. In this example, both speaker units 3 are arranged in opposite directions, a set of displacement limiting means 13 is arranged on the back side (49) and the front side (47) of the frame 45, and the front side ( 47) and a set of deformation limiting means 43 are arranged on the back side (49). The displacement limiting means 13 and the deformation limiting means 43 have the same configuration as in the examples shown in FIGS. 8 and 9 except for the following points.

  First, both the displacement limiting means 13 on the back side and the front side of the frame 45 are arranged as point objects, and both the deformation limiting means 43 on the front side and the back side of the frame 45 are also arranged as point objects. The centers of these point objects are the same, and are at the center of gravity of the rectangular baffle plate that is the support 5, that is, one point on the straight line connecting the intersections of the diagonal lines on both the front and back sides of the baffle plate. Both speaker units 3 are also arranged point-symmetrically with respect to the center of symmetry.

  Further, the support member 15 of the displacement limiting means 13 located at the upper position on the rear side (49) of the frame 45 has a half 65A of the lower horizontal plate 65, a lower half 59B of the vertical plate, and an intermediate horizontal plate 83. It is comprised by. The intermediate horizontal plate 83 is in common with a part of the support member 83 of the deformation limiting means 43 located at the lower position on the back side of the frame 45. Similarly, the support member 15 of the displacement restricting means 13 at the lower position on the front side (47) of the frame 45 has a half 65B of the lower horizontal plate 65, a lower half 87B of the vertical plate, and an intermediate horizontal plate 89. It is comprised by. The horizontal plate 89 is in common with a part of the support member 83 of the deformation limiting means 43 located at the upper position on the front side of the frame 45.

  According to the example shown in FIG. 10, when both speaker units 3 are driven in the opposite phase, both displacement limits are the same as when the speaker units are driven in the same phase in the examples shown in FIGS. The means 13 limits the displacement of both magnetic circuits 11 caused by the vibration of both diaphragms 9 in the axial direction of both speaker units 3. By limiting the displacement of the magnetic circuit 11, deformation or vibration of the frame 7 that supports the magnetic circuit 11 is reduced or suppressed, and deterioration of the quality of sound emitted from each speaker unit 3 is reduced.

  Depending on the vibration direction of the diaphragms 9 of the two speaker units 3, at any one point in time, the support member 15 of the upper displacement limiting means 13 and the support body 5 to which it is attached are arranged to limit the displacement of the magnetic circuit 11. Deflection or deformation (deformation A) occurs, and a deflection or deformation (deformation B) opposite to deformation A occurs in the support member 15 of the lower displacement limiting means 13 and the support body 5 to which the support member 15 is attached. 2, deformation B occurs in the upper displacement limiting means 13 and deformation A occurs in the lower displacement limiting means 13. The forms of both deformations A and B are point-symmetric with respect to the center of symmetry, on the premise of deformation resistance or form maintainability possessed by both the support member and the support constituting the displacement limiting means.

  That is, when both the speaker units 3 are not driven, each support member 15 and the support 5 have a shape that defines a rectangular outer shape as a whole, and both the speaker units 3 are in opposite phases. For example, the deformation A of the upper displacement limiting means 13 and the deformation B of the lower displacement limiting means 13 that occur when driven take the following forms.

  That is, in the deformation A, the upper half portion 59A of the vertical plate 59 of the support member 15 and the upper half portion of the support 5 opposite thereto are bent in opposite directions, and the horizontal plate above the support member 15 is used. The half 61A of 61 and the intermediate horizontal plate 63 (see FIG. 8) are bent toward each other. In short, both long sides of the rectangle swell and both short sides dent. On the other hand, the deformation B of the lower displacement limiting means 13 takes the following form. That is, the lower half 87B of the vertical plate 87 of the support member 15 and the lower half of the support 5 opposite thereto are bent toward each other, and the half of the horizontal plate 65 below the support member 15 The 65B and the intermediate horizontal plate 89 are bent in opposite directions. In short, both long sides of the rectangle are recessed and both short sides swell. Therefore, when both speaker units 3 are driven in opposite phases, both deformations A and B are simultaneously generated in the upper and lower displacement limiting means 13, and therefore both deformations A and B cancel each other, and the upper and lower displacement limiting means 13 The means 13 is not apparently deformed. As a result, deformation or deflection of the support 5 is further suppressed, and the sound quality of the speaker unit 3 can be further reduced.

  Both deformation limiting means 43 also function when both speaker units 3 are driven in opposite phases, and in the example shown in FIGS. 8 and 9, the speaker units are driven in the same phase. Similarly to the case, the deformation of the support 5 caused by the vibrations of both diaphragms 9 in the axial direction of both speaker units 3 is limited.

  In the both deformation limiting means 43, the support member 83 of the upper deformation limiting means 43 and the support body 5 to which the upper deformation limiting means 43 is attached at any one time depending on the vibration direction of the diaphragm 9 of both speaker units 3. And a deformation or deformation (deformation D) opposite to the deformation C occurs in the support member 83 of the lower deformation limiting means 43 and the support body 5 to which the support member 83 is attached. At the time, deformation D occurs in the upper deformation limiting means 43 and deformation C occurs in the lower deformation limiting means 43. The forms of both deformations C and D are point-symmetric with respect to the center of symmetry, on the premise of deformation resistance or form maintainability possessed by both the support member and the support constituting the deformation limiting means.

  That is, when both the speaker units 3 are not driven, each support member 83 and the support body 5 jointly define a rectangular outer shape, and both the speaker units 3 are driven in opposite phases. For example, the deformation C of the upper deformation limiting means 43 and the deformation D of the lower deformation limiting means 43 take the following forms.

  That is, in the deformation C, the upper half portion 87A of the vertical plate 87 of the support member 83 and the upper half portion of the support body 5 opposed thereto are bent in opposite directions, and the horizontal plate above the support member 83. The half part 61B of 61 and the intermediate | middle horizontal board 89 take the form which mutually bends toward the other one. In short, both long sides of the rectangle swell and both short sides dent. On the other hand, the deformation D of the lower deformation limiting means 43 takes the following form. That is, the lower half portion 59B of the vertical plate 59 of the support member 83 and the lower half portion of the support body 5 opposite thereto are bent toward one another, and the half portion of the horizontal plate 65 below the support member 15 The 65B and the intermediate horizontal plate 89 are bent in opposite directions. In short, both long sides of the rectangle are recessed and both short sides swell. Therefore, when both the speaker units 3 are driven in opposite phases, both deformations C and D are simultaneously generated in the upper and lower deformation limiting means 43. For this reason, both deformations C and C cancel each other, and the upper and lower deformation limiting means 43 The means 43 is not apparently deformed. As a result, deformation or deflection of the support 5 is further suppressed, and the sound quality of the speaker unit 3 can be further reduced.

  In the example shown in FIG. 10, the arrangement of both deformation limiting means 43 can be omitted and only the both displacement limiting means 13 can be provided. FIG. 11 shows an example of the speaker device 1 in which only the two displacement limiting means 13 that are point-symmetric with respect to each other are arranged, in which the arrangement of the both deformation limiting means 43 is omitted. In the example shown in FIG. 11, the support body 5 made of a baffle plate that supports both speaker units 3 arranged in opposite directions is replaced with both displacement limiting means 13 instead of the frame 45 in FIG. 10. And a pair of leg members 107.

  Both displacement limiting means 13 are composed of a pair of support members 15 fixed to the support body 5 and bolts 17 constituting a pair of pressing members respectively supported by them, as in the above-described example. The illustrated displacement limiting means 13 includes a pair of upper and lower parallel plates 109, 111 and 113, 115 facing each other, and a belt-like plate disposed between and fixed to each pair of plates and extending in the vertical direction. Member 117. Each pair of plate bodies and plate members 117 jointly define a U-shaped side shape.

  One (lower) plate body 111 and upper plate body 113 in each pair are arranged so as to be orthogonal to and in contact with both surfaces of the support body 5 at substantially the intermediate position in the vertical direction of the support body 5, respectively. The upper plate body 109 and the lower plate body 115 are arranged so as to be orthogonal to and in contact with both surfaces of the support body 5 at the upper and lower portions of the support body 5, respectively. It is being fixed to the support body 5 by not shown. In order to reinforce the maintenance of the orthogonal state of each plate 109 to 115 with respect to the support 5, angle iron 119 is further arranged at the intersection of the support 5 and each plate 109 to 115 and fixed by bolts 121. ing. The lower plate body 111 is supported by both leg members 107.

  Each plate member 117 is located at a position facing the magnetic circuit 11 of each speaker unit 3 and is fixed to each plate body 109 to 115 via a bolt 123. Reference numerals 125 and 127 form spacers and reinforcing members for maintaining the mutual spacing between the upper and lower plate bodies 109, 111 and 113, 115, respectively.

  The both displacement limiting means 13 in the speaker device 1 shown in FIG. 11 acts and functions in the same manner as the both displacement limiting means 13 in the example shown in FIG. In order to avoid duplication of explanation, the detailed explanation is omitted.

  In any example of the one set of deformation limiting means 43, the width and thickness dimensions of the plate constituting the support member 83 are set to be different between the deformation means 43, or It is arbitrary to set so that there is a difference in the number of bolts 85 used.

  10 and 11, that is, the sound radiated from the speaker device 1 in which the pair of speaker units 3 are disposed in the opposite directions can be heard by the listener on the side surface of the speaker device 1. desirable. That is, as representatively shown in FIG. 10, it is desirable to hear the sound radiated from the speaker device 1 in the direction of arrow A. Further, although not shown in the figure, when listening to the sound by the stereo system using the pair of speaker devices 1, both the speaker devices 1 are directed to the listener, that is, both the speaker devices 1 are V. It is desirable to be located on both lines of the letter and the listener is located at the apex of the letter V. Furthermore, the listener can hear the sound from the speaker device 1 (FIGS. 1, 2, and 5 to 9) in which all of the plurality of speaker units 3 are directed in the same direction. 9 can be done.

It is sectional drawing which is an example of the speaker unit which has a set of displacement limiting means arrange | positioned by the speaker apparatus which concerns on this invention at plane symmetry. It is sectional drawing similar to FIG. 1 which shows the other example of a speaker apparatus. It is a perspective view which shows the further another example of the speaker apparatus by which both displacement restriction | limiting means are arrange | positioned mutually symmetrically. It is a top view which shows both the speaker units above the speaker apparatus shown in FIG. 3 in a cross section. It is sectional drawing of the speaker apparatus which has three or more speaker units supported by the flat baffle board. It is a perspective view of the speaker apparatus which has three or more speaker units supported by the airtight type housing | casing. It is a perspective view of the speaker apparatus which has three or more speaker units supported by the fan-shaped baffle board. It is a back perspective view which shows an example of the speaker apparatus which has a set of displacement limiting means and a set of deformation | transformation means which are mutually arrange | positioned by plane symmetry. It is a front perspective view of the speaker apparatus shown in FIG. It is a front perspective view which shows an example of the speaker apparatus which has a set of displacement limiting means and a set of deformation | transformation means arrange | positioned mutually point-symmetrically. It is a perspective view which shows an example of the speaker apparatus which has a set of displacement limiting means arrange | positioned mutually at point symmetry.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Speaker apparatus 3 Speaker unit 5 Support body of speaker unit 7 Frame in speaker unit 9 Diaphragm in speaker unit 11 Magnetic circuit 13 in speaker unit Displacement restricting means 15 in magnetic circuit Support member 17 in displacement restricting means Pressing member in displacement restricting means 27 Coupling means 29 Bar-shaped member 43 Deformation limiting means 63 in support body Common portion 83 in displacement restriction means Support member 85 in deformation restriction means Pressing member 89 in deformation restriction means Common portion L in deformation restriction means Axis S of speaker unit Symmetry plane

Claims (2)

A pair of identical speaker units having a frame, a diaphragm supported by the frame, and a magnetic circuit for generating vibration in the diaphragm;
A support that supports both speaker units, the support having both speaker units oriented in the same direction and spaced from each other;
A set of displacement limiting means for limiting the displacement of both magnetic circuits in the axial direction of the speaker unit caused by the vibration of the diaphragms of both speaker units, respectively, so as to be symmetrical with respect to the support. A set of attached displacement limiting means;
A coupling means extending perpendicularly to the plane of symmetry of both displacement limiting means and having rigidity for coupling both displacement limiting means to each other;
The speaker apparatus characterized by the above-mentioned. A pair of identical speaker units having a frame, a diaphragm supported by the frame, and a magnetic circuit for generating vibration in the diaphragm;
A support body for supporting both speaker units, the support body having both speaker units arranged in the same direction and spaced apart from each other;
A set of displacement limiting means for limiting the displacement of both magnetic circuits in the axial direction of the speaker unit, which occurs with the vibration of the diaphragms of both speaker units,
Attached to the support so as to be symmetrical with each other;
A pair of abutting portions that are in contact with each other to counteract the vibrations of both magnetic circuits, or a common part that cancels out the vibrations of both magnetic circuits
And a pair of displacement limiting means .

Images