JP4597230B2 - Speaker device, electric device, and manufacturing method thereof - Google Patents

Description

  The present invention relates to a loudspeaker, an electric device, a device, and a method for manufacturing the same that vibrate a diaphragm with a voice coil disposed in a magnetic circuit.

  Conventionally, speaker devices can be broadly classified into two types, an inner magnet type and an outer magnet type (see, for example, Patent Document 1). As described in Patent Document 1, an internal magnet type speaker device has a magnet disposed between a yoke formed of a magnetic material in a substantially dish shape and a disk-shaped top plate. A cylindrical voice coil integrally provided on one surface of the diaphragm is disposed in the magnetic gap between the periphery of the yoke and the periphery of the top plate so as to be movable in the axial direction. On the other hand, an outer-magnet type speaker device has a flange portion projecting outwardly in a hook shape at one axial end of a center pole formed in a substantially cylindrical shape of a yoke, and a ring-shaped top corresponding to the flange portion. A ring-shaped magnet is disposed between the plate and the plate. A cylindrical voice coil integrally provided on one surface of the diaphragm is disposed in the magnetic gap between the outer peripheral surface of the center pole of the yoke and the inner peripheral surface of the top plate so as to be movable in the axial direction. .

JP-A-58-53299 (page 3, upper left column-page 4, lower right column, FIGS. 3 and 6)

  By the way, portable electric devices such as mobile phones, PHS (Personal Handyphone System), PDA (Personal Digital Assistant), and notebook personal computers have been widely used in recent years, and a reduction in size and weight of the speaker is expected.

  An object of the present invention is to provide a speaker device, an electric device, and a manufacturing method thereof that can be easily reduced in thickness in view of the above-described actual situation.

  The invention according to claim 1 is disposed between the magnet main body, the yoke magnetically coupled to one magnetic pole of the magnet main body, the vibration part, the edge part, and the vibration part and the edge part. A diaphragm having a raised portion, a magnetic body magnetically coupled to the yoke, and disposed opposite to the magnet body, and a voice coil wound around the raised portion, The magnetic body includes an inner tube portion, an outer tube portion, and a bridging portion disposed so as to cover the edge portion between the inner tube portion and the outer tube portion, and the inner tube portion The shape extends from the bridging portion along the upper portion, the vibration portion is disposed inside the inner cylinder portion, and a magnetic gap is formed between the inner cylinder portion and the magnet body. The speaker device is characterized in that the upright portion is disposed through the magnetic gap. It is.

  According to a twenty-fourth aspect of the present invention, there is provided an electric apparatus comprising the speaker device according to any one of the first to twenty-third aspects.

  The invention according to claim 25 is disposed between the magnet body, the yoke magnetically coupled to one magnetic pole of the magnet body, the vibration part, the edge part, and the vibration part and the edge part. A loudspeaker device manufacturing method comprising: a diaphragm having an upright part; and a voice coil supported by the diaphragm, wherein the inner cylinder part, the outer cylinder part, and the inner cylinder part and the outer cylinder part A magnetic body provided with a bridging portion disposed in a state of covering the edge portion between the magnetic body and the magnetic body, the magnetic body being attached to the yoke in a state of being magnetically coupled to face the magnet body; The vibrating portion of the diaphragm is disposed at an inner position of the inner cylinder portion, and the upright portion of the diaphragm is substantially along the inner cylinder portion of the magnetic body, and the inner cylinder portion of the magnetic body and the magnet The vibration placed in a state of passing through the magnetic gap formed with the main body It is a manufacturing method of the speaker device, wherein the method of manufacturing a speaker apparatus comprising: the step of arranging the plate, the.

  Hereinafter, a first embodiment which is an embodiment of a speaker device of the present invention will be described with reference to the drawings. In addition, although this Embodiment illustrates about a small speaker apparatus, it is not this limitation.

[First Embodiment]
(Configuration of speaker device)
FIG. 1 is a plan view showing the speaker device. FIG. 2 is a side view showing the speaker device. FIG. 3 is a cross-sectional view showing the speaker device. In FIGS. 1 to 3, reference numeral 100 denotes a speaker device. The speaker device 100 is used for a portable electric device such as a mobile phone, a PHS (Personal Handyphone System), a PDA (Personal Digital Assistant), and a notebook personal computer. It is a small-sized device that outputs sound signals by sound generation. The speaker device 100 includes a magnet unit 200, a magnetic body 300, a diaphragm 400, and a voice coil 500.

  The magnet unit 200 includes a magnet main body 210, an inner yoke 220, and an outer yoke 230. The magnet body 210 is formed of a magnetic material in a substantially ring shape, and different magnetic pole surfaces are formed on the inner peripheral surface and the outer peripheral surface. That is, the magnet main body 210 is magnetized, for example, so as to have an N pole on the inner peripheral surface and an S pole on the outer peripheral surface. The magnet unit 200 and the magnetic body 300 constitute a magnetic circuit.

  The inner yoke 220 is formed in a substantially ring shape from a magnetic material such as a steel plate containing iron as a main component. The inner yoke 220 has an axial dimension that is substantially the same as or slightly longer than that of the magnet body 210, and one end surface in the axial direction is flush with one end surface of the magnet body 210 or is slightly displaced in the axial direction. The magnet body 210 is fitted and fixed in the state. The inner yoke 220 may be integrally joined to the magnet body 210 with an adhesive or the like.

  The outer yoke 230 is formed in a substantially ring shape with a magnetic material like the inner yoke 220. The outer yoke 230 has an outer periphery fitting portion 231 whose inner diameter is substantially the same as the outer diameter of the magnet body 210. At one end in the axial direction of the outer periphery fitting portion 231, a flange portion 232 that protrudes outward in a bowl shape is formed in a series. Further, a positioning fitting portion 233 that is bent in a cylindrical shape coaxial with the outer peripheral fitting portion 231 is bent in a series on the outer peripheral edge of the flange portion 232. The outer yoke 230 has a magnet body in a state where one end surface in the axial direction opposite to the side on which the flange portion 232 is provided is flush with the one end surface in the axial direction of the magnet body 210 or slightly shifted in the axial direction. The magnet part 200 is assembled and formed integrally in a state in which 210 is fitted and fixed to the inner peripheral surface. The magnet unit 200 is in a state in which a magnetic pole surface, that is, an N pole is formed on the inner peripheral surface of the inner yoke 220. The outer yoke 230 may be integrally joined to the magnet body 210 with an adhesive or the like.

  The magnetic body 300 is formed in a substantially ring shape with a magnetic material like the inner yoke 220 and the outer yoke 230, for example. The magnetic body 300 has an outer cylinder portion 310 as an outer frame portion formed in a substantially cylindrical shape whose outer diameter is substantially the same as the inner diameter of the positioning fitting portion 233 of the outer yoke 230. At one end of the outer cylinder portion 310 in the axial direction, a bridging portion 320 that is bent in an approximately arc shape on the inner peripheral side is formed in series. Further, an inner cylinder portion 330 as an inner frame portion formed in a substantially cylindrical shape whose outer diameter is smaller than the inner diameter of the inner yoke 220 of the magnet portion 200 by a predetermined dimension on the inner peripheral edge of the bridging portion 320. It is bent. A plurality of substantially circular through holes 321 may be formed in the bridging portion 320.

  In the magnetic body 300, the end surface of the outer cylinder portion 310 opposite to the side on which the bridging portion 320 is provided contacts the flange portion 232 of the outer yoke 230 of the magnet portion 200, and the outer cylinder portion 310 is in contact with the magnet portion 200. The outer yoke 230 is connected to the positioning fitting portion 233 with an adhesive or the like. In addition, it is not restricted to the adhesion | attachment by an adhesive agent, You may connect by engaging the nail | claw part formed by cutting and raising, joining by welding, etc. The magnetic body 300 is connected to the outer yoke 230 of the magnet part 200, and the outer peripheral surface of the inner cylindrical part 330 faces the inner peripheral surface of the inner yoke 220 via a magnetic gap G having a predetermined gap size. A magnetic pole surface, that is, an S pole is formed on the outer peripheral surface of the inner cylindrical portion 330 to constitute a magnetic circuit.

  The vibration plate 400 is formed in a substantially thin film shape, for example, with a magnesium thin plate or a resin film whose surface has been subjected to an anti-corrosion treatment, and has a curved vibration portion 410 at a substantially center. On the periphery of the vibration part 410, a substantially cylindrical upright part 420 is bent and formed in a series on the side opposite to the side on which the vibration part 410 is curved. The upright portion 420 is formed such that the inner diameter is larger than the outer diameter of the magnetic inner cylinder portion 330 and the outer diameter is smaller than the inner diameter of the inner yoke 220 of the magnet portion 200. Further, at one end in the axial direction of the upright portion 420, a curved edge portion 430 that is curved in the same direction as the vibrating portion 410 in the outer circumferential direction is formed in a series of arcs. In addition, a holding portion 440 that protrudes outward in a bowl shape is formed in a series at the outer peripheral edge of the edge portion 430. The diameter of diaphragm 400 is formed to be approximately the same as the inner diameter of positioning fitting portion 233 of outer yoke 230 of magnet unit 200. Further, the width dimension in the radial direction of the holding part 440 is formed to be approximately the same as the thickness dimension of the outer cylinder part 310 of the magnetic body 300. In addition, you may comprise the vibration part 410, the edge part 430, and the standing part 420 separately, respectively. Moreover, the vibration part 410 and the upright part 420 may be comprised integrally, and the edge part 430 and the upright part 420 may be comprised integrally.

  When the diaphragm 400 is coupled to the magnet unit 200 of the magnetic body 300, the clamping unit 440 is clamped between the flange unit 232 of the outer yoke 230 of the magnet unit 200 and one end of the outer cylinder unit 310. The magnetic body 300 is assembled while being positioned and held. The assembled vibration plate 400 is positioned so that the upright portion 420 is movable in the axial direction without contacting between the inner yoke 220 of the magnet portion 200 and the inner cylindrical portion 330 of the magnetic body 300. The magnetic body 300 is disposed in a state of being located on the inner peripheral side of the inner cylindrical portion 330.

  The voice coil 500 is wound, for example, by winding a wire directly around the outer peripheral surface of the upright portion 420 of the diaphragm 400. It should be fixed with an adhesive or the like. Then, both ends of the wire are drawn out to the side opposite to the side to which the magnetic body 300, which is the lower side in FIG. 2, is connected, and serve as an input end of the audio signal. In addition, a voice coil may be fixed to the inner peripheral surface of the upright portion 420.

(Assembly operation of speaker device)
Next, the assembly operation of the speaker device 100 will be described with reference to the drawings. 4A and 4B are explanatory views showing the assembly operation of the speaker device 100. FIG. 4A is an explanatory view showing a positioning process of the magnet main body 210, the inner yoke 220 and the outer yoke 230, and FIG. 4B is a positioning process of the diaphragm 400. (C) is an explanatory view showing the assembly process of the magnetic body 300, (D) is an explanatory view showing a completed state of the speaker device 100.

  First, an assembly jig 600 formed in advance is placed at a predetermined assembly position. As shown in FIG. 4, the assembly jig 600 is formed of, for example, a synthetic resin and has a mounting portion 610 on a substantially circular plate. A substantially cylindrical gap positioning portion 620 having a central axis passing through the center of the placement portion 610 is integrally projected on one surface of the placement portion 610. Further, the gap positioning portion 620 may be formed with a plurality of notches 621 that are recessed along the axial direction in a state of being divided into a plurality of portions.

  Then, as shown in FIG. 4 (A), the magnet part 200 that is assembled and formed integrally with the assembly jig 600 in advance is placed in a state where the gap positioning part 620 of the assembly jig 600 is fitted to the inner periphery. Place on top. Thereafter, an adhesive (not shown) is applied to the upper surface of the flange portion 232 of the outer yoke 230 of the magnet portion 200 placed on the placement portion 610.

  Further, as shown in FIG. 4B, the upright portion 420 of the diaphragm 400 around which the voice coil 500 is wound is inserted into a state where the outer periphery of the voice coil 500 is fitted to the inner periphery of the gap positioning portion 620. Let At this time, since the plurality of cut portions 621 are provided in the gap positioning portion 620, the frictional force is relatively reduced and the gap is relatively smoothly fitted. Further, the adhesive 440 that is applied in advance is superposed on the holding portion 440 that is the peripheral portion of the diaphragm 400 so as to be placed on the flange portion 232 while being fitted to the positioning fitting portion 233 of the outer yoke 230 of the magnet portion 200. To be joined.

  Thereafter, as shown in FIG. 4C, the end of the outer cylindrical portion 310 of the magnetic body 300 is fitted to the positioning fitting portion 233 of the outer yoke 230 of the magnet portion 200, while on the flange portion 232. The diaphragm 400 is fitted until it comes into contact with the holding portion 440 of the diaphragm 400, and the holding portion 440 of the diaphragm 400 is held by the flange portion 232 and the outer cylinder portion 310. In this state, the flange part 232 and the outer cylinder part 310 are joined by the adhesive previously applied.

  Then, as shown in FIG. 4D, the assembly jig 600 is attached from the side opposite to the side where the magnetic body 300 is joined so that the gap positioning portion 620 is pulled out from between the magnet portion 200 and the voice coil 500 of the diaphragm 400. The speaker device 100 is assembled and formed.

(Effects of speaker device)
As described above, in the first embodiment, the holding portion 440 at the peripheral portion of the diaphragm 400 integrally provided with the voice coil 500 is positioned and held, and the magnet portion 200 is formed on one magnetic pole surface of the magnet portion 200. The outer cylinder part 310 of the magnetic body 300 is joined via the outer yoke 230 that constitutes the outer periphery of the magnetic body 300, and the bridging part 320 that continues from the outer cylinder part 310 of the magnetic body 300 to the inner peripheral side covers the edge part 430 of the diaphragm 400. The magnetic gap that interposes the voice coil 500 in the radial direction of the magnet part 200 so that the inner coil part 330 of the magnetic body 300 continuing to the bridging part 320 faces the inner peripheral side of the voice coil 500 is movable. G is formed to form a magnetic circuit. For this reason, the magnetic body 300 enters a dome shape from the outer peripheral side of the diaphragm 400 to the inner peripheral side of the voice coil 500 through the surface of the edge portion 430, and the magnet unit 200 is positioned on the outer peripheral side of the voice coil 500. Since the amplitude of the vibration plate 400 is relatively narrow particularly in the case where it is used for a portable electric device, even if the distance between the edge portion 430 and the magnetic body 300 is reduced, the vibration portion 410 is sufficiently formed. Sound generation by vibration is obtained, the dimension in the thickness direction can be reduced, and a reduction in thickness can be easily obtained. In addition, since the magnetic body 300 is located in a dome shape on the surface side where the sound is generated, by characterizing the shape of the inner cylindrical portion 330, for example, acoustic characteristics such as horn effect and tube resonance can be easily performed without using other members. The versatility can be improved.

  The diaphragm 400 is formed by providing a series of substantially cylindrical upstanding portions 420 from the vibrating portion 410 and providing a series of peripheral edge portions 430 from the upstanding portion 420. For this reason, the voice coil 500 can be directly wound around the outer peripheral surface of the upright portion 420 of the diaphragm 400, so that the productivity can be improved and the diaphragm can be used without using a bobbin around which the voice coil 500 is wound. 400 can be integrally provided, and the configuration can be simplified, and the size and weight can be reduced and the cost can be reduced easily. Further, the standing portion 420 can easily obtain a state in which the magnetic body 300 wraps around the inner periphery of the voice coil 500, and can easily be reduced in thickness without making the diaphragm 400 and the magnetic body 300 complex. Manufacturability can be easily improved. A voice coil wound in advance may be fixed to the inner peripheral surface of the upright portion 420 with a fixing member such as an adhesive.

  Further, a gripping portion 440 that protrudes outward from the outer peripheral edge of the edge portion toward the outer peripheral edge of the diaphragm 400 and is positioned and held by the magnetic body 300, that is, held by the outer yoke 230 of the magnet portion 200, is provided. It is provided in a series. For this reason, the diaphragm 400 can be easily positioned and held by the magnetic body 300, that is, the diaphragm 400 can be easily positioned and held by holding the diaphragm 400 with the outer yoke 230 constituting the magnet unit 200. Manufacturability can be easily improved with a simple configuration.

  Further, since the peripheral edge portion of the diaphragm 400 is held by the outer yoke 230 of the magnet portion 200 at one end face of the outer cylinder portion 310 of the magnetic body 300, the positioning and holding of the diaphragm 400 can be suppressed while suppressing an increase in the radial dimension. Can be easily reduced in size.

  The diaphragm 400 can be easily positioned by forming the diameter of the diaphragm 400 to be substantially the same as the inner diameter of the positioning fitting portion 233 of the outer yoke 230 of the magnet unit 200, such as a boss for positioning. The voice coil 500 can be easily positioned at a predetermined position of the magnetic gap G without providing a special configuration, and the productivity can be easily improved with a simple configuration.

  Further, the inner yoke 220 is fitted to the inner circumference side of the ring-shaped magnet body 210 having different poles in the radial direction, that is, different magnetic pole faces on the outer circumference surface and the inner circumference surface, and the outer yoke 230 is fitted on the outer circumference side. Thus, the magnetic circuit before the magnetic body 300 is attached is integrally formed. For this reason, as a configuration for positioning and holding the peripheral portion of the vibration plate 400, it is possible to obtain a simple configuration in which the magnetic body 300 and the outer yoke 230 are clamped and fixed. It is easy to obtain a magnetic circuit by forming the magnetic gap G in a state in which the magnetic wrap around and is located on the inner peripheral side of the voice coil 500 with a simple configuration.

  Furthermore, as a configuration of the magnetic body 300 that covers the edge portion 430 of the diaphragm 400 continuously to one magnetic pole surface of the magnet portion 200 and goes around to the inner peripheral side of the voice coil 500, the magnetic body 300 is joined to the outer yoke 230 of the magnet portion 200. A bridge that covers the edge portion 430 of the diaphragm 400 between the end portion of the outer cylinder portion 310 and the end portion of the inner cylinder portion 330 that is smaller in diameter than the outer cylinder portion 310 and whose outer peripheral surface faces the inner periphery of the voice coil 500. The unit 320 is connected in series. For this reason, it can be easily formed with a simple configuration, for example, by pressing a steel plate, the manufacturability can be easily improved, and a thin shape can be easily obtained.

  In addition, a positioning fitting portion 233 is provided on the outer yoke 230 of the magnet portion 200, and when the magnetic body 300 is coupled, the magnetic body 300 is positioned and fitted so that the centers are positioned concentrically with each other. For this reason, the assembly work for obtaining the predetermined magnetic gap G can be easily performed, and the productivity can be easily improved with a simple configuration. Further, the diaphragm 400 can be positioned by the positioning fitting portion 233, and the productivity can be easily improved with a simpler configuration.

  Then, a through hole 321 is provided in the bridging portion 320 of the magnetic body 300 facing the edge portion 430 of the diaphragm 400. For this reason, since the air between the bridging portion 320 and the edge portion 430 communicates with the outside through the through hole 321, the edge portion 430 of the diaphragm 400 vibrates in conjunction with the movement of the voice coil 500 during sound generation. At this time, it is possible to prevent the air between the bridging portion 320 and the edge portion 430 from being pressurized and depressurized to restrict the vibration of the edge portion 430, and to obtain a good vibration of the diaphragm 400, and to reproduce the audio signal well Output is obtained.

[Second Embodiment]
Next, a second embodiment, which is another embodiment of the speaker device of the present invention, will be described with reference to FIG. The second embodiment shown in FIG. 5 is obtained by changing the magnetization direction of the magnet unit 200 in the first embodiment. FIG. 5 is a cross-sectional view showing the speaker device according to the second embodiment. In the second embodiment, the same components as those in the first embodiment are denoted by the same reference numerals and description thereof is omitted. The same applies to the third embodiment described below.

(Configuration of speaker device)
In FIG. 5, reference numeral 700 denotes a speaker device. The speaker device 700 includes a magnet unit 800, a magnetic body 900, and a diaphragm 400 and a voice coil 500 similar to those in the first embodiment.

  The magnet unit 800 includes a magnet body 810, a connecting yoke 820, and a magnetic pole forming yoke 830. The magnet body 810 is formed of a magnetic material in a substantially ring shape, and different magnetic pole faces are formed on both end faces in the axial direction. That is, the magnet body 810 is magnetized so that, for example, the axial end surface on the upper side in FIG. 5 is an N pole and the axial end surface on the lower side in FIG.

  The connecting yoke 820 is formed in a substantially ring shape from a magnetic material such as a steel plate containing iron as a main component. The connecting yoke 820 has an inner diameter and an outer diameter that are substantially the same as those of the magnet body 810, and is integrally joined to one end surface, which is an upper surface in the axial direction, with an adhesive or the like. Further, the connecting yoke 820 is formed to be inclined so that the inner peripheral surface expands toward one side in the axial direction. The connecting yoke 820 is integrally joined to the magnet main body 810 with an adhesive, for example, so that the inner peripheral surface expands upward. In this joined state, the corner of the magnet body 810 and the corner of the connecting yoke 820 are continuous, and the inner peripheral surface of the magnet body 810 and the inner peripheral surface of the connecting yoke 820 are continuous at an obtuse angle. . In addition, when the area which contacts the magnet main body 810 of the clamping part 440 is fully ensured, the connection yoke 820 may be abbreviate | omitted and the clamping part 440 may be contact | abutted directly to the magnet main body 810. FIG.

  The magnetic pole forming yoke 830 is formed in a substantially ring shape from a magnetic material like the connecting yoke 820. The magnetic pole forming yoke 830 has a ring-shaped holding plate portion 831 whose inner diameter is smaller than the inner diameter of the magnet body 810 and whose outer diameter is substantially the same as the outer diameter of the magnet body 810. A substantially cylindrical magnetic pole forming portion 832 having a central axis that is coaxial with the central axis of the clamping plate portion 831 is formed in a series at the inner peripheral edge of the clamping plate portion 831. Further, the upper end surface, which is one end in the axial direction, of the magnetic pole forming portion 832 is formed in a state of being inclined outward. The magnetic pole forming yoke 830 is integrally joined with an adhesive so that the outer peripheral edge is continuous with the outer peripheral edge of the magnet main body 810 and the holding plate portion 831 and the connecting yoke 820 hold the magnet main body 810. In this joined state, the magnetic pole forming portion 832 is separated from the inner peripheral surface of the magnet main body 810, and the distal end portion is gradually separated from the magnet main body 810 and the connecting yoke 820 by the inclined end surface which is the distal end surface. The opposing corners are in an obtuse angle.

  As shown in FIG. 5, in the magnetic body 900, the gripping hook portions 910 are bent in series in a bowl shape toward the outer side at the lower edge of the outer yoke 230 in the magnetic body 300 of the first embodiment. It is formed into a shape. Note that the gripping hook portion 910 is formed so that the outer diameter of the magnetic body 900 is substantially the same as the outer diameter of the magnet portion 200.

  In the magnetic body 900, the gripping hook portion 910 is integrally connected to the upper surface of the connecting yoke 820 of the magnet portion 200 with, for example, an adhesive. In addition, it is not restricted to the adhesion | attachment by an adhesive agent, You may connect by engaging the nail | claw part formed by cutting and raising, joining by welding, etc. In the magnetic body 900, the outer peripheral surface of the inner cylindrical portion 330 is opposed to the inner peripheral surface of the magnetic pole forming portion 832 of the magnetic pole forming yoke 830 through a magnetic gap G having a predetermined gap size in a state where it is connected to the magnet portion 200. To do. Thus, a magnetic pole surface, that is, an N pole is formed on the outer peripheral surface of the inner cylindrical portion 330, and an S pole is formed on the inner peripheral surface of the magnetic pole forming portion 832, thereby forming a magnetic circuit. Since the inner peripheral surface of the connecting yoke 820 of the magnet unit 200 is inclined and the tip surface of the magnetic pole forming unit 832 of the magnetic pole forming yoke 830 is inclined, the magnetic flux is transferred from the tip of the magnetic pole forming unit 832 to the connecting yoke 820 and the magnet body 810. Is suppressed from leaking.

  Further, the holding part 440 of the diaphragm 400 is wider than that of the first embodiment, and the diameter dimension of the diaphragm 400 is formed to be approximately the same as the outer diameter of the magnet part 200. That is, the width dimension of the holding part 440 in the radial direction is formed by subtracting the inner diameter of the outer cylinder part 310 of the magnetic body 900 from the outer diameter of the magnetic body. Thus, the outer peripheral surface of the edge portion 430 is positioned on the inner peripheral surface of the outer cylindrical portion 310 when the magnetic body 900 is bonded to the magnet portion 200.

(Assembly operation of speaker device)
Next, the assembly operation of the speaker device 700 will be described.
An assembly jig 600 similar to that of the first embodiment described above is arranged at a predetermined assembly position. Then, the magnet portion 800 that is assembled and integrated integrally with the assembly jig 600 is placed on the placement portion 610 so that the gap positioning portion 620 of the assembly jig 600 is fitted to the inner periphery. Thereafter, an adhesive (not shown) is applied to the upper surface of the connecting yoke 820 of the magnet unit 800.

  Thereafter, the upright portion 420 of the diaphragm 400 around which the voice coil 500 is wound is inserted into a state where the outer periphery of the voice coil 500 is fitted to the inner periphery of the gap positioning portion 620. And the clamping part 440 used as the periphery of the diaphragm 400 is superimposed on the connection yoke 820 of the magnet part 800, and it joins with the adhesive previously apply | coated. Thereafter, an adhesive is further applied to the upper surface of the holding part 440.

  Then, the gripping part 910 of the magnetic body 900 is attached to the gripping part 440 of the diaphragm 400 adhered to the magnet part 800 so that the outer peripheral edge is flush with the outer peripheral edge of the gripping part 440 and the outer peripheral edge of the magnet part 800. Superimpose and bond with pre-applied adhesive. When the magnetic body 900 is joined, the outer peripheral surface of the edge portion 430 of the vibration plate 400 is positioned at the lower end edge of the outer cylinder portion 310 of the magnetic body 900. As a result, the voice coil 500 is placed at a predetermined position between the inner cylinder portion 330 and the magnetic pole forming portion 832 of the magnet portion 200. Thereafter, the assembly jig 600 is removed in the same manner as in the first embodiment, and the speaker device 700 is assembled and formed.

(Effects of speaker device)
As described above, in the second embodiment, similarly to the first embodiment, the magnetic body 900 is joined to one magnetic pole surface of the magnet unit 800 via the connecting yoke 820, and the diaphragm 400. The edge portion 430 is covered and provided so as to wrap around the inner peripheral side of the voice coil 500. For this reason, similarly to the first embodiment, the thickness can be easily reduced. Further, by characterizing the shape of the inner cylindrical portion 330 of the magnetic body 900, for example, acoustic characteristics such as horn effect and tube resonance can be easily adjusted without using other members, and versatility can be improved.

  Further, a gripping hook portion 910 that is clamped and fixed to the magnetic body 900 by the magnet portion 800 is provided. For this reason, the magnetic body 900 can be reliably joined, a favorable magnetic circuit can be obtained, and the diaphragm 400 can be reliably fixed.

  Then, the diaphragm 400 is formed so that the diameter dimension is substantially the same as the outer diameter of the magnet part 200, and the width dimension in the radial direction of the holding part 440 is changed from the outer diameter of the magnetic body to the inner diameter of the outer cylinder part 310 of the magnetic body 900. The dimension is formed by subtracting. For this reason, when the magnetic body 900 is joined to the magnet portion 200, the outer peripheral surface of the edge portion 430 is positioned on the inner peripheral surface of the outer tube portion 310, and the voice coil 500 is not provided with a special configuration. Can be easily arranged at a predetermined position.

  Furthermore, since the outer diameter of the magnetic body 900 is the same as the outer diameter of the magnet portion 800, the center of the magnetic body 900 and the magnet portion 800 can be easily positioned on the concentric axis, improving the manufacturability. In addition, it is possible to assemble and form an appropriate magnetic gap G by a simple operation of confirming the state of the outer peripheral edge when the magnetic body 900 is joined.

  Since the inner peripheral surface of the connecting yoke 820 of the magnet unit 800 is inclined, the magnetic flux can be prevented from leaking from the magnetic pole forming unit 832 to the connecting yoke 820, and a good magnetic circuit can be obtained with a simple configuration. Furthermore, since the tip end surface of the magnetic pole forming portion 832 is also inclined, the leakage of magnetic flux can be prevented and a better magnetic circuit can be obtained. Further, since the inner peripheral edge of the connecting yoke 820 is joined to the inner peripheral edge of the magnet main body 810 in a continuous manner, the corner of the magnet main body 810 is not exposed, and the magnetic flux is transferred from the tip of the magnetic pole forming portion 832 to the corner of the magnet main body 810. Can be further prevented, and a better magnetic circuit can be obtained.

[Third Embodiment]
Next, a third embodiment, which is another embodiment of the speaker device of the present invention, will be described with reference to FIGS. In the third embodiment shown in FIG. 6, the ring-shaped magnet portion 200 in the first embodiment described above is changed to a rod-shaped magnet. FIG. 6 is a plan view showing the speaker device according to the third embodiment, and FIG. 7 is a cross-sectional view taken along one-dot chain line AA in FIG.

(Configuration of speaker device)
In FIG. 6, 100A is a speaker device, and this speaker device 100A includes a magnet unit 200A, a magnetic body 300A, a diaphragm 400A, and a voice coil 500A.

  The magnet unit 200A includes a magnet body 210A, an inner yoke 220A, and an outer yoke 230A. The magnet body 210A is formed of a magnetic material in the form of a rod having a longitudinal direction, and has different magnetic poles on the inner surface (the surface facing the center position of the speaker device 100A) and the outer surface (the surface facing the outside of the speaker device 100A). A surface is formed. That is, the magnet main body 210A is magnetized, for example, in a state of N pole on the inner side and S pole on the outer side, and a magnetic circuit is formed between the magnet part 200A and the magnetic body 300A.

  The inner yoke 220A is formed in a rod-like flat plate having a longitudinal direction with a magnetic material such as a steel plate containing iron as a main component. The inner yoke 220A has an axial dimension slightly longer than that of the magnet body 210A, and an adhesive or the like is attached to the inner surface of the magnet body 210A with one end face in the axial direction being flush with one end face of the magnet body 210A. It is fixed with the adhesive means.

  The outer yoke 230A is made of a magnetic material, like the inner yoke 220A. The outer yoke 230A includes linear portions 233A that face each other and an arc portion 234A that connects these linear portions 233A. The outer yoke 230A has an outer fixing portion 231A that is fixed to the magnet body 210A. At one end in the axial direction of the outer fixing portion 231A, a flange portion 232A protruding outward in a bowl shape is formed in a series. The linear portion 233A of the outer yoke 230A is fixed to the magnet body 210A in a state where one end surface in the axial direction opposite to the side where the flange portion 232A is provided is flush with one end surface in the axial direction of the magnet body 210A. The magnet portion 200A is assembled and formed integrally. The magnet unit 200 forms a magnetic pole surface, that is, an N pole, on the inner side surface of the inner yoke 220A, and forms a magnetic pole surface, that is, an S pole, on the outer surface of the outer yoke 230A. The speaker device 100A is provided with a pair of such bar-shaped magnet portions 200A at positions facing each other.

  The magnetic body 300A is formed of a magnetic material in a substantially rod shape. The magnetic body 300A has an outer frame portion 310A formed at the upper part in the axial direction of the outer yoke 230A. At the lower end in the axial direction of the outer frame portion 310A, a pressing portion 311A that protrudes outwardly in a hook shape is bent in a series. The other end of the outer frame portion 310A is formed with a series of bridging portions 320A bent inward in a substantially arc shape. Further, at the end of the bridging portion 320A opposite to the side on which the outer frame portion 310A is formed, an inner frame portion 330A formed in a substantially rod-like flat plate inside by a predetermined dimension from the inner surface of the inner yoke 220A of the magnet portion 200A. Are bent in series. In addition, a plurality of substantially circular through holes 321 are formed in the bridging portion 320A.

  In the magnetic body 300A, the pressing portion 311A of the outer frame portion 310A is in contact with the flange portion 232A of the outer yoke 230A of the magnet portion 200A and is fixed by an adhesive. In addition, it is not restricted to the adhesion | attachment by an adhesive agent, You may connect by engaging the nail | claw part formed by cutting and raising, joining by welding, etc. In the state where the magnetic body 300A is connected to the magnet portion 200A, the outer surface of the inner frame portion 330A faces the inner surface of the inner yoke 220A via a magnetic gap G having a predetermined gap size, and the inner frame portion 330A A magnetic pole surface, that is, an S pole is formed on the outer side surface to constitute a magnetic circuit.

  The vibration plate 400A is formed in a substantially thin film shape using, for example, a magnesium thin plate or a resin film whose surface is subjected to a touch-proof treatment. The diaphragm 400A is formed in an oval shape having a longitudinal direction in accordance with the rod-like shapes of the magnet part 200A and the magnetic body 300A, and the magnet part 200A and the magnetic body 300A are respectively located at positions corresponding to two sides along the longitudinal direction. Is arranged. A curved vibrating portion 410A is provided at the approximate center of the vibration plate 400A. A substantially cylindrical upright portion 420A is bent and formed in a series on the periphery of the vibrating portion 410A on the side opposite to the side on which the vibrating portion 410 is curved. The upright portion 420A is formed so as not to contact between the outer surface of the magnetic inner frame portion 330A and the inner surface of the inner yoke 220A of the magnet portion 200A. Further, at one end in the axial direction of the upright portion 420A, an edge portion 430A having a curved shape that curves in the same direction as the vibrating portion 410A is bent in a series of arcs. In addition, a holding portion 440A that protrudes outwardly in a hook shape is bent in a series on the outer periphery of the edge portion 430A. In addition, you may comprise the vibration part 410A, the edge part 430A, and the upright part 420A separately. Moreover, the vibration part 410A and the upright part 420A may be integrally configured, or the edge part 430A and the upright part 420A may be integrally configured.

  The voice coil 500 </ b> A is wound by winding a wire, for example, directly on the outer surface of the upright portion 420 of the diaphragm 400. It should be fixed with an adhesive or the like. Then, both ends of the wire are drawn out to the side opposite to the side to which the magnetic body 300 is connected, and serve as an input end for the audio signal.

Further, in the arc portion 234A where the magnet body 210A of the outer yoke 230A is not disposed, the diaphragm 400A is formed in an arc shape in the plane direction. The voice coil 500A has a straight line portion where the magnet main body 210A and the magnetic body 300A are disposed, and the diaphragm 400A is disposed along the rod-shaped magnet main body 210A and hits the arc portion 234A of the outer yoke 230A. It is formed in an arc shape according to the shape of the upright portion 420A.
The holding portion 440A of the vibration plate 400A is clamped and fixed between the flange portion 232A of the outer yoke 230A and the pressing portion 311A of the outer frame portion 310A in the linear portion 233A where the magnet body 210A and the magnetic body 300A are arranged. Then, it is fixed to the outer yoke 230A by means such as adhesion. Further, a holder that covers the outer yoke 230A and holds the diaphragm 400A in the arc portion may be used.

(Effects of speaker device)
Similar to the operation and effect of the first embodiment described above, the magnetic body 300A is joined to one magnetic pole surface of the magnet part 200A via the outer yoke 230A, covers the edge part 430A of the diaphragm 400A, and covers the voice coil 500. Provided to wrap around inside. Thus, similar to the first embodiment, the thickness can be easily reduced, and the shape of the inner frame portion 330A can be characterized to adjust the acoustic characteristics such as horn effect and tube resonance without using other members. it can.

  Further, since the rod-shaped magnet portion 200A is used in the third embodiment, it is easier to process and the processing cost is lower than that of the ring-shaped magnet. Thereby, in 3rd Embodiment, the effort and cost concerning a production can be reduced.

  Further, since the voice coil 500A is wound around the upright portion 420A of the diaphragm 400A in a shape having a straight line portion, the voice coil 500A straight line portion and the straight line portion of the rod-shaped magnet portion 200A are arranged in correspondence with each other. Can do. As a result, since the voice coil 500A can be kept at a constant distance from the magnetic pole surface of the magnet portion 200A without bending, a good magnetic circuit can be maintained.

  And since a pair of rod-shaped magnet part 200A is opposingly arranged, the magnetic circuit formed by these magnet parts 200A becomes a contrasting form, and the same left-right symmetrical by the electric signal which flows into voice coil 500A Since vibration can be obtained, good vibration of the diaphragm 400A can be obtained, and good reproduction output of an audio signal can be obtained.

  The diaphragm 400A is formed in an oval shape having a longitudinal direction and a direction orthogonal to the longitudinal direction in accordance with the shape of the voice coil 500A and the shape of the magnet portion 200A. It can be assembled easily, for example, it can be easily combined.

[Fourth Embodiment]
Next, a fourth embodiment, which is another embodiment of the speaker device of the present invention, will be described with reference to FIGS. 8 is a plan view showing the speaker device according to the fourth embodiment, FIG. 9 is a cross-sectional view taken along a dashed-dotted line BB in FIG. 8, and FIG. 10 is a cross-sectional view taken along a dashed-dotted line CC in FIG. It is.

(Configuration of speaker device)
In the speaker device of the third embodiment, the voice coil is formed in a substantially rectangular shape in a plane, which is the fourth embodiment. In FIG. 8, in the speaker device 100B, the voice coil 500B is formed in a rectangular shape, and rod-shaped magnet portions 200A and 200B are arranged at positions corresponding to the four sides of the rectangular shape. That is, a pair of rod-shaped magnet portions 200A opposed to the longitudinal direction of the rectangle are arranged, and a pair of opposed rod-shaped magnet portions 200B are arranged in a direction orthogonal to the longitudinal direction. These magnet parts 200B are arranged on both ends of the magnet part 200A and are designed to be smaller than the length of the magnet part 200A. The description of the magnet part 200A is omitted because it is the same as that of the third embodiment described above, and the direction perpendicular to the longitudinal direction in which the magnet part 200B is disposed will be described below.

  The magnet unit 200B includes a magnet body 210B, an inner yoke 220B, and an outer yoke 230B. The magnet body 210B is formed of a magnetic material in a rod shape, and magnetic pole surfaces that are the same as the magnet body 210A are formed on the inner surface and the outer surface. That is, for example, if the magnet body 210B is magnetized with the N pole on the inner surface of the magnet body 210A and the S pole on the outer surface, the magnet body 210B has the N pole on the inner surface and the S pole on the outer surface. Is magnetized.

  The inner yoke 220B is a member formed in the same manner as the inner yoke 220A described in the third embodiment. However, since the length of the magnet body 210B to be fixed is smaller than the length of the magnet body 210A, The longitudinal dimension of the inner yoke 220B is also set smaller than the longitudinal dimension of the inner yoke 220A.

  The outer yoke 230B includes linear portions 233A that face each other and an arc portion 234B that connects the linear portions 233A. The outer yoke 230B includes an outer fixing portion 231A that is fixed to the magnet body 210A and an outer fixing portion 231B that is fixed to the magnet body 210B. Flange portions 232A and 232B projecting outwardly in a hook shape are bent in a series at one end in the axial direction of the outer fixing portions 231A and 232B. At this time, the flange portion 232B in the arc portion 234A is formed larger outside than the flange portion in the straight portion 233A so that the holding portion 440A of the diaphragm 400B can be bonded and fixed to the flange portions 232A and 232B. Yes.

  An outer frame portion 310B of the magnetic body 300B is provided on the axially upper portion of the outer fixing portion 231B of the outer yoke 230B. At the lower end in the axial direction of the outer frame portion 310B, a pressing portion 311B that protrudes outwardly in a hook shape is bent in a series. The pressing portion 311B has a shape that protrudes greatly to the outside, and is formed so as to be joined to the flange portion 232B of the outer yoke 230B. At the other end of the outer frame portion 310B, a bridging portion 320B bent inward in a substantially arc shape is formed in series, and further, an inner frame portion 330B is bent in a series inside the bridging portion 320B. . In the magnetic body 300B, the outer peripheral surface of the inner frame portion 330B is opposed to the inner peripheral surface of the inner yoke 220B through a magnetic gap G having a predetermined gap size in a state of being connected to the outer yoke 230B of the magnet portion 200B. A magnetic pole surface, that is, an S pole is formed on the outer peripheral surface of the inner frame portion 330B to constitute a magnetic circuit.

  The diaphragm 400B is formed in a substantially thin film shape using, for example, a magnesium thin plate or cone paper whose surface has been subjected to anti-corrosion treatment. The diaphragm 400B is formed in an oval shape having a longitudinal direction in accordance with the rod-like shapes of the magnet part 200A and the magnetic body 300A. A vibration part 410B having a curved surface is provided at substantially the center of the vibration plate 400B. The vibrating portion 410B is formed in a substantially rectangular shape, and a substantially cylindrical upright portion 420B is bent and formed in a series on the periphery of the vibrating portion 410B on the side opposite to the side on which the vibrating portion 410B is curved. The upright portion 420B is formed so as not to contact between the outer side surfaces of the inner frame portions 330A and 330B of the magnetic body and the inner side surfaces of the inner yokes 220A and 220B of the magnet portions 200A and 200B. Further, at one end in the axial direction of the upright portion 420B, an edge portion 430B having a curved shape that curves in the same direction as the vibrating portion 410B is bent in a series of arcs. In addition, a holding portion 440B that protrudes outward in a hook shape is formed in a series on the outer periphery of the edge portion 430B. In addition, you may comprise the vibration part 410B, the edge part 430B, and the upright part 420B separately, respectively. Moreover, the vibration part 410B and the upright part 420B may be comprised integrally, and the edge part 430B and the upright part 420B may be comprised integrally.

(Effects of speaker device)
Similar to the operational effects of the first embodiment described above, the magnetic bodies 300A and 300B are joined to one of the magnetic pole surfaces of the magnet portions 200A and 200B via the outer yoke 230B to cover the edge portion 430B of the diaphragm 400B. Are provided so as to wrap around the voice coil 500B. Thus, similar to the first embodiment, it can be easily reduced in thickness, and the acoustic characteristics such as horn effect and tube resonance are prepared without using other members by characterizing the shapes of the inner frame portions 330A and 330B. Can be adjusted.

  In addition, the voice coil 500B is formed in a rectangular shape, a pair of rod-shaped magnet portions 200A facing each other in the longitudinal direction of the rectangle is provided, and a pair of rod-shaped magnet portions 200B facing each other in a direction orthogonal to the longitudinal direction. It is provided on both ends of the magnet part 200A. As a result, it is easier to create than when a ring-shaped magnet is used, and a magnetic circuit can be formed on the entire circumference of the voice coil 500B by the rod-shaped magnet, so that a good sound reproduction output can be obtained. be able to.

[Modification of Embodiment]
In addition, this invention is not limited to each embodiment mentioned above, The deformation | transformation shown below is included in the range which can achieve the objective of this invention.

  That is, the configuration of the magnet units 200 and 800 is not limited to the configuration described above, and can be changed as appropriate. For example, as described above, the connecting yoke 820 may not be provided. Further, the magnetic bodies 300 and 900 can be changed to any shape that is connected to one of the magnetic pole surfaces of the magnet portions 200 and 800 and goes around the inner periphery of the voice coil 500. For example, in the second embodiment, when the end portion of the outer cylindrical portion 310 of the magnetic body 900 can be sufficiently joined, the gripping hook portion 910 may not be provided, or the flange portion 232 may not be provided. . Furthermore, also in the first embodiment, the positioning fitting portion 233 may not be provided if positioning can be easily performed by an assembly jig or the like.

  For example, as shown in FIG. 11, the positioning yoke is not provided in the outer yoke 230 of the magnet unit 200 in the first embodiment, and the diaphragm 400 is held using the magnetic body 900 in the second embodiment. It may be fixed.

  For example, as shown in FIG. 11, the magnetic body 300 may be provided with a configuration capable of obtaining acoustic characteristics such as a bass reflex effect, a horn effect, and tube resonance. That is, taking FIG. 11 as an example, reference numeral 950 denotes a cover portion, and the cover portion 950 has a plate portion 951 formed in a substantially disc shape by, for example, a steel plate. On the periphery of the plate portion 951, a joint portion 952 that is bent to be inclined toward one surface and joined to the magnetic body 900 is provided. Further, a plurality of circular holes 953A are formed in the plate portion 951. A series of substantially cylindrical ducts 953 led out to the side where the joint portion 952 is bent are provided at the inner peripheral edge of the circular hole 953A. The cover portion 950 is attached to the magnetic body 900 integrally with the end portion of the joining portion 952 joined to the bridging portion 320 of the magnetic body 900 by welding or the like in a state where the duct 953 protrudes toward the diaphragm 400. . The through hole 321 provided in the magnetic body 900 is preferably provided in a state facing the space defined by the cover portion 950 and the diaphragm 400. According to such a configuration, the edge portion 430, the magnetic body 900, Can be used as a volume that resonates with the duct 953, so that the bass reflex effect can be produced, and more appropriate acoustic characteristics can be obtained.

  Further, the cover portion 950A in FIG. 6 has a plate portion 951A formed in a substantially rectangular shape. The peripheral edge of the plate portion 951A is joined to the magnetic body 300A and connects the magnetic bodies 300A facing each other. In particular, as in the third embodiment, the speaker device 100A in which the pair of rod-shaped magnet portions 200A are opposed to each other is weakened by pressure in a direction perpendicular to the longitudinal direction of the speaker device. By connecting between 300A, the speaker device 100A can be reinforced and the diaphragm 400A can be protected. Further, the hole 954 provided in the cover part 950A is a hole for transmitting sound vibration generated from the speaker device 100A to the outside.

  Thus, since the magnetic bodies 300 and 900 cover the edge portion 430 and wrap around the inner peripheral side of the voice coil 500, the cover portion 950 on the substantially disk can be easily attached, and the productivity is improved. The vibration plate 400 can be protected with a simple configuration. Furthermore, it is possible to easily impart acoustic characteristics with a simple configuration in which the substantially cylindrical horn portion 953 is provided in the cover portion 950. In addition, when using the cover part 950 only as a cover of the diaphragm 400, it is preferable to make the board part 951 into a structure that ensures sound propagation, for example, by using a punching metal or mesh structure.

  Furthermore, the structure which joins the magnetic bodies 300 and 900 and the magnet parts 200 and 800 may be any method. For example, as shown in FIG. 12, if a sufficient positioning coercive force is obtained, the width dimension of the gripping portion 440 of the diaphragm 400 is reduced, and the gripping hook portion 910 of the magnetic body 300 and the magnet portion 800 are connected. A part of the yoke 820 may be directly joined. In this case, for example, by providing a level difference in the thickness of the gripping part 440 in the gripping part 910, positioning can be facilitated and adhesion between the gripping part 910 and the connecting yoke 820 is improved. According to the configuration shown in FIG. 12, since the magnetic body 300 and the magnet portion 800 are directly joined, leakage of magnetic flux can be prevented and a good magnetic circuit can be obtained. A step corresponding to the thickness of the holding portion 440 may be provided on the connecting yoke 820 or on both sides.

  In addition, the magnetic body 300, 900 and the magnet part 200, 800 have been described by holding and positioning and holding the peripheral edge of the diaphragm 400, but not limited to the configuration of holding and holding by this clamping and fixing, For example, the magnetic body 300, 900 may be configured to position and hold the diaphragm 400, and the magnetic body 300, 900 may be directly positioned to hold the diaphragm 400.

  As described above, the speaker devices 100 and 700 are not limited to those used for portable electric devices.

  Further, when assembling and forming the speaker devices 100 and 700, the assembly jig 600 may not be used. The assembly jig 600 is not limited to the above configuration. For example, when using the magnetic body 900, you may use jigs, such as the structure which further provided the member which positions the outer peripheral surface of the magnet parts 200 and 800 in the state where the outer periphery of the magnetic body 900 continues. Furthermore, it is good also as a structure which does not have the notch | incision part 621, the positioning part 620 was formed in the substantially cylindrical shape, and was projected in multiple numbers on the circumference.

  Further, a dustproof member such as a net, a woven fabric, or a non-woven fabric may be provided on the side where the assembly jig 600 opposite to the side on which the magnetic bodies 300 and 900 are attached, which is the back side of the speaker devices 100 and 700. .

  Further, although the voice coil 500 is wound around the outer peripheral surface of the upright portion 420 of the diaphragm 400, for example, it may be wound around the inner peripheral surface of the upright portion 420.

  Further, in the third and fourth embodiments, the planar shape of the diaphragms 400A and 400B is an oval shape, but may be a rectangular shape, an elliptical shape, a substantially polygonal shape such as a triangular shape or a hexagonal shape, or the like. As long as it is formed in a closed shape. Similarly, for the voice coils 500A and 500B, for example, the shape in the planar direction may be a rectangular shape, an elliptical shape, a substantially polygonal shape such as a triangular shape or a hexagonal shape, that is, as long as it is formed in a closed shape. Good. When the voice coil is formed in a planar elliptical shape, an elliptical magnet may be used, or an arc-shaped magnet and a rod-shaped magnet may be used in combination. When the voice coil is formed in a substantially polygonal shape in a plane, a bar magnet can be installed at a position corresponding to each side.

  In addition, in the first and second embodiments, ring-shaped magnets are used, and in the third and fourth embodiments, rod-shaped magnets are used. However, these ring-shaped magnets and rod-shaped magnets are combined. The shape of these magnets is not particularly particular. For example, a speaker device that can form a magnetic circuit over a front circumference portion using an oval speaker device having a longitudinal direction using a rod-shaped magnet in a linear portion and a semicircular magnet in an arc portion. Also good.

  In the first, third, and fourth embodiments and FIGS. 3, 7, and 9, the magnet portions 200, 200A, and 200B include inner yokes 220, 220A, and 220B and magnet bodies 210, 210A, Although 210B and the outer yokes 230, 230A, 230B are formed so that one end surfaces in the axial direction are flush with each other, the present invention is not limited to this. That is, for example, as shown in FIG. 13, the magnet body 210 of the magnet portion 200 may be disposed slightly downward along the axial direction.

  In addition, the specific structure and procedure for carrying out the present invention can be appropriately changed to other structures and the like within a range in which the object of the present invention can be achieved.

[Effects of Embodiment]
As described above, the peripheral portion of the diaphragm 400 integrally provided with the voice coil 500 is positioned and held, the magnetic body 300 is made continuous with one magnetic pole surface of the magnet unit 200, and the edge portion 430 of the diaphragm 400 is covered. Thus, the magnetic body 300 is opposed to the inner peripheral side of the voice coil 500, and the magnetic coil G is formed in the radial direction of the magnet portion 200 so that the voice coil 500 is movable in the axial direction to form a magnetic circuit. For this reason, the magnetic body 300 enters a dome shape from the outer peripheral side of the diaphragm 400 to the inner peripheral side of the voice coil 500 through the surface of the edge portion 430, and the magnet unit 200 is positioned on the outer peripheral side of the voice coil 500. Since the amplitude of the vibration plate 400 is relatively narrow particularly in the case where it is used for a portable electric device, even if the distance between the edge portion 430 and the magnetic body 300 is reduced, the vibration portion 410 is sufficiently formed. Sound generation by vibration can be obtained, the dimension in the thickness direction can be reduced, and the thickness can be easily reduced. In addition, since the magnetic body 300 is positioned in a dome shape on the surface side where the sound is generated, for example, acoustic characteristics such as horn effect and tube resonance can be easily adjusted by the magnetic body 300 without using other members. Can be improved.

It is a top view which shows the speaker apparatus in the 1st Embodiment of this invention. It is a side view which shows the speaker apparatus in the said 1st Embodiment. It is sectional drawing which shows the speaker apparatus in the said 1st Embodiment. It is explanatory drawing which shows the assembly operation | movement of the speaker apparatus in the said 1st Embodiment. (A): Explanatory drawing showing the magnet positioning step (B): Explanatory drawing showing the diaphragm positioning step (C): Explanatory drawing showing the magnetic material assembling step (D): Explanatory view showing the completed state of the speaker device Figure It is sectional drawing which shows the speaker apparatus in the 2nd Embodiment of this invention. It is a top view which shows the speaker apparatus in the 3rd Embodiment of this invention. It is sectional drawing which shows the speaker apparatus in the 3rd Embodiment of this invention. It is a top view which shows the speaker apparatus in the 4th Embodiment of this invention. It is sectional drawing which shows the speaker apparatus in the 4th Embodiment of this invention. It is another sectional drawing which shows the speaker apparatus in the 4th Embodiment of this invention. It is sectional drawing which shows the speaker apparatus in further another embodiment of this invention. It is sectional drawing which shows the speaker apparatus in further another embodiment of this invention. It is sectional drawing which shows the speaker apparatus in further another embodiment of this invention.

Explanation of symbols

100, 700, 100A, 100B Speaker device 200, 800, 200A, 200B Magnet section 210, 810, 210A, 210B Magnet body 220, 220A, 220B Inner yoke 230, 230A Outer yoke 233 Positioning fitting section 300 as positioning section, 900, 300A, 300B Magnetic body 310, 310A, 310B Outer cylinder part 320, 320A, 330B Bridged part 321 Through hole 330, 330A, 330B Inner cylinder part 400, 400A, 400B Vibration plate 410, 410A, 410B Vibration part 420, 420A , 420B Upright part 430, 430A, 430B Edge part 440, 440A, 440B Gripping part 500, 500A, 500B Voice coil 600 Assembly jig 610 Mounting part 620 Gap positioning part 621 Notch 820 connecting yoke 830 magnetic pole forming yoke 950,950A, 950B cover 953 horn section G magnetic gap

Claims (27)

A magnet body;
A yoke magnetically coupled to one magnetic pole of the magnet body;
A diaphragm having an oscillating portion, an edge portion, and an upright portion disposed between the oscillating portion and the edge portion;
A magnetic body that is magnetically coupled to the yoke and disposed opposite the magnet body;
A voice coil wound around the upright portion,
The magnetic body includes an inner cylinder part, an outer cylinder part, and a bridging part arranged to cover the edge part between the inner cylinder part and the outer cylinder part,
The inner cylinder part is a shape extending from the bridge part along the upright part,
The vibration part is arranged inside the inner cylinder part,
A magnetic gap is formed between the inner tube portion and the magnet body,
The upright portion is disposed so as to pass through the magnetic gap. The speaker device according to claim 1,
The speaker device, wherein the magnet body is disposed between the diaphragm and the yoke. The speaker device according to claim 2,
The bridge unit is disposed on a sound radiation surface side of the diaphragm. The speaker device according to claim 3,
The speaker device according to claim 1, wherein the yoke extends from a lower end of the magnet body toward the outer cylinder portion and surrounds the magnet body. The speaker device according to claim 4,
The upright part and the inner cylinder part are substantially parallel. The speaker device characterized by things. The speaker device according to claim 5,
The said edge part has an arch-shaped cross-sectional shape. The speaker apparatus characterized by the above-mentioned. The speaker device according to claim 6,
The speaker device, wherein the diaphragm is supported by the yoke or the outer cylinder portion. The speaker device according to any one of claims 1 to 7,
The yoke extends from the lower side of the magnet body toward the outer cylinder portion, surrounds the magnet body, and is magnetically coupled to the magnetic body;
A speaker device comprising: an inner yoke that contacts an inner side of the magnet main body and forms a magnetic gap with the inner cylinder portion. The speaker device according to claim 7,
The speaker device, wherein an outer peripheral portion of the diaphragm is sandwiched between the yoke and the outer tube portion. The speaker device according to claim 1,
A positioning device for positioning the diaphragm is formed on an outer periphery of the yoke or the magnetic body. The speaker device according to claim 10,
The said positioning part has a flange part. The speaker apparatus characterized by the above-mentioned. The speaker device according to claim 11,
The said flange part is extended and formed toward an outer side. The speaker apparatus characterized by the above-mentioned. The speaker device according to any one of claims 1 to 12,
The speaker device, wherein a positioning fitting portion for positioning the magnetic body is formed on an outer peripheral portion of the yoke. The speaker device according to claim 13,
The speaker fitting, wherein the positioning fitting portion has a cross-sectional shape. The speaker device according to claim 13,
The yoke includes a flange portion that extends outward on an outer peripheral portion;
The speaker fitting according to claim 1, wherein the positioning fitting portion is formed by bending from an extending front end side of the flange portion in a direction intersecting with the extending direction of the flange portion. The speaker device according to any one of claims 1 to 15,
The vibration part or the edge part is formed in a shape protruding in a sound radiation direction. The speaker device according to any one of claims 1 to 16,
The speaker body, wherein the magnet body is formed in a ring shape. The speaker device according to any one of claims 1 to 16,
The speaker body, wherein the magnet body is formed in a rod shape. The speaker device according to claim 18, wherein
The speaker device, wherein the voice coil is formed in a substantially polygonal shape, and the magnet main body is disposed at a position corresponding to each side of the substantially polygonal shape. The speaker device according to any one of claims 1 to 19,
The speaker device, wherein the diaphragm is provided with a series of pinching portions that protrude outward in an outer peripheral edge of the edge portion and are positioned and held by the magnetic body. The speaker device according to any one of claims 1 to 20,
The said magnetic body was equipped with the through-hole provided in the position facing the edge part of the said diaphragm. The speaker apparatus characterized by the above-mentioned. The speaker device according to any one of claims 1 to 21,
A speaker device comprising a cover portion attached to the magnetic body and covering a vibration portion of the diaphragm. The speaker device according to claim 22, wherein
The said cover part was equipped with the cylindrical horn part which has an axial direction in a predetermined direction. The speaker apparatus characterized by the above-mentioned. An electric apparatus comprising the speaker device according to any one of claims 1 to 23. A method of manufacturing a speaker device,
The speaker device
A magnet body;
A yoke magnetically coupled to one magnetic pole of the magnet body;
A diaphragm having an oscillating portion, an edge portion, and an upright portion disposed between the oscillating portion and the edge portion;
A voice coil supported by the diaphragm;
Comprising at least
A magnetic body comprising an inner tube portion, an outer tube portion, and a bridging portion disposed between the inner tube portion and the outer tube portion so as to cover the edge portion is magnetically opposed to the magnet body. An arrangement step of the magnetic body attached to the yoke in a connected state;
The vibrating part of the diaphragm is arranged at an inner position of the inner cylinder part, and the upright portion of the diaphragm is substantially along the inner cylinder part of the magnetic body, and the inner cylinder part of the magnetic body and the magnet body An arrangement step of a diaphragm arranged to pass through a magnetic gap formed between
A method for manufacturing a speaker device, comprising: A method of manufacturing a speaker device according to claim 25,
The arrangement step of the diaphragm includes
Using the assembly jig provided with a substantially flat plate-like placement portion, and a gap positioning portion provided in a substantially opening shape on one surface of the placement portion, the magnet body and the upright portion are connected to the assembly jig. A speaker device manufacturing method comprising a positioning step of positioning at a position sandwiching the gap positioning portion. A method of manufacturing a speaker device according to claim 25 or claim 26,
The yoke includes a positioning fitting portion on an outer peripheral portion thereof,
The step of arranging the magnetic body includes
A method for manufacturing a speaker device, comprising: an attaching step of fitting an outer peripheral edge of an outer peripheral cylindrical portion of the magnetic body to a positioning fitting portion of the yoke.

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