JP2007329639A - Speaker apparatus and method for manufacturing the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To assemble a speaker apparatus by simple processes, without using jigs, adhesives, etc., to position a plate and a magnet with high accuracy, to provide a small speaker apparatus having comparatively high strength, and so on. <P>SOLUTION: The speaker apparatus 1 has an external magnet type magnetic circuit 10 with a magnet 14 and a plate 15 placed on a yoke 13, in this order, and a frame 16 for supporting a diaphragm 17. Along with forming the frame 16, having an inner circumference in approximately the same shape as that of the outer circumference of the plate 15 in a method for manufacturing the speaker, the frame 16 and the yoke 13 are integrally formed by insertion molding. Positioning of the plate 15 is performed by the outer circumference of the plate 15 and the inner circumference of the frame 16, by fitting the plate 15 into the frame 16 along with putting the unmagnetized ring-shaped magnet 14, and the plate 15 on the yoke 13, in this order. The magnet 14 is magnetized, and the yoke 13, the magnet 14 and the plate 15 are fixed by its magnetic force. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a speaker device manufacturing method and a speaker device.

  A method for assembling a speaker device including a general outer magnet type magnetic circuit and a dome-shaped diaphragm will be described.

  First, using a jig, a ring-shaped magnet is placed on the yoke via an adhesive, etc., and a ring-shaped plate is placed on the magnet via an adhesive, etc. Fix the magnet and plate. At this time, the magnet and the plate are positioned with respect to the yoke so as to form a gap between the center pole of the yoke and the plate. Next, a voice coil bobbin and a diaphragm are arranged in the gap so that the voice coil is positioned, and fixed to the speaker frame via the edge portion of the diaphragm.

  As described above, when assembling the speaker device, it is necessary to perform a complicated process such as positioning using a jig or bonding and fixing a yoke, magnet, or plate using an adhesive. For example, using an adhesive Therefore, a method of assembling a speaker device more easily is desired.

  For example, in Patent Document 1, a yoke part constituting a magnetic circuit of a microspeaker, a magnet fixed to an upper part of an outer peripheral edge of the yoke part, and an upper plate fixed to the upper part of the magnet are separately coupled to a speaker frame. There is disclosed a magnetic circuit integrally coupled with a speaker frame manufactured by injection molding without requiring a process.

JP 2002-218590 A

  However, in the magnetic circuit described in Patent Document 1 described above, the yoke, the magnet, and the plate are integrally formed with the frame by injection molding without using an adhesive or the like. It is difficult to change the plates and magnets.

  By the way, the strength of the yoke is relatively low when, for example, the yoke is simply processed into a metal flat plate to form a central convex portion and a stepped flange portion in order to reduce the weight and thickness of the speaker device. There is a risk of becoming. If the strength of the yoke is relatively low, the sound quality of the reproduced sound from the speaker device may be reduced.

  This invention makes it an example of a subject to cope with such a problem. That is, without using a jig or an adhesive, a plate or magnet is assembled by a simple process to produce a speaker device, and a high-quality speaker device in which the plate or magnet is positioned with high accuracy is provided. It is an object of the present invention to provide a small speaker device having a relatively high strength.

  In order to achieve such an object, the present invention comprises at least the configurations according to the following independent claims.

  According to the first aspect of the present invention, an outer magnet type magnetic circuit in which a ring-shaped magnet and a plate are placed in order on a yoke, an outer peripheral side of the outer magnet type magnetic circuit, and a diaphragm are supported. A method of manufacturing a speaker device having a frame, and at least forming the frame having an inner periphery substantially the same shape as the outer periphery of the plate, and integrally forming the frame and the yoke by insert molding; The unmagnetized ring-shaped magnet and the plate are placed on the yoke in order, and the plate is fitted to the frame. The outer periphery of the plate and the inner periphery of the frame are used to place the plate relative to the frame. A step of positioning, magnetizing the magnet, and the magnetic force of the magnet, the yoke, the magnet, and the front Characterized by a step of fixing the plate.

  According to a fifth aspect of the present invention, an outer magnet type magnetic circuit in which a ring-shaped magnet and a plate are placed in order on a yoke, an outer peripheral side of the outer magnet type magnetic circuit, and a diaphragm are supported. A speaker device having a frame, wherein the frame and the yoke are integrally formed by insert molding, and at least an outer periphery of the ring-shaped plate is formed in substantially the same shape as an inner periphery of the frame, Is fitted to the frame, the outer periphery of the plate is regulated and positioned by the inner periphery of the frame, and the yoke, the magnet, and the plate are fixed by the magnetic force of the magnet.

  According to one embodiment of the present invention, a speaker device manufacturing method includes an outer magnet type magnetic circuit in which a ring-shaped magnet and a plate are placed in order on a yoke, and an outer magnet type magnetic circuit formed on the outer peripheral side of the outer magnet type magnetic circuit and vibrating. A method of manufacturing a speaker device having a frame for supporting a plate, the step of forming an inner peripheral frame that is at least approximately the same shape as the outer periphery of the plate, and integrally forming the frame and the yoke by insert molding; Placing a non-magnetized ring-shaped magnet and plate on the yoke in order, fitting the plate to the frame, and positioning the plate with respect to the frame by the outer periphery of the plate and the inner periphery of the frame; Magnetizing and fixing the yoke, magnet and plate by the magnetic force of the magnet.

  In the speaker device according to an embodiment of the present invention, the frame and the yoke are integrally formed by insert molding by the manufacturing method described above, and at least the outer periphery of the ring-shaped plate is substantially the same shape as the inner periphery of the frame. The plate is fitted into the frame, the outer periphery of the plate is regulated and positioned by the inner periphery of the frame, and the yoke, magnet, and plate are fixed by the magnetic force of the magnet.

  In the above-described method for manufacturing a speaker device according to an embodiment of the present invention, first, at least an inner frame having substantially the same shape as the outer periphery of the plate is formed, and the frame and the yoke are integrally formed by insert molding. In addition, an unmagnetized ring-shaped magnet and a plate are sequentially placed on the yoke, and the plate is fitted to the frame, and the plate is positioned with respect to the frame by the outer periphery of the plate and the inner periphery of the frame. The plate can be positioned with respect to the frame with high accuracy without using a tool. In addition, since the speaker device can be manufactured without using a jig, the equipment cost can be reduced as compared with the conventional case.

  In addition, when assembling the outer magnet type magnetic circuit, the magnet is fitted to the frame and positioned with respect to the frame by the outer periphery of the magnet and the inner periphery of the frame, for example, with high accuracy without using a jig. The magnet can be positioned with respect to the frame.

  Also, since the yoke, magnet, and plate are fixed by magnetizing an unmagnetized magnet and the magnetic force of the magnet, an external magnet type magnetic circuit can be assembled with high accuracy without using an adhesive.

  In addition, after magnetizing the magnet, the diaphragm on which the voice coil is placed is fixed to the frame so that the voice coil is positioned in the magnetic gap of the external magnetic type magnetic circuit assembled with high precision. Even when the magnetic circuit is assembled without using the agent, the diaphragm can be arranged with high accuracy in a state where the plate and the magnet are arranged at the prescribed position without deviating from the prescribed position with respect to the yoke. .

  The yoke is formed in a substantially flat plate shape with a metal material, and has a convex portion having a hole and a flange portion formed on the outer peripheral side of the convex portion. By forming the reinforcing member on the back surface side and the hole of the convex portion, a small speaker device with relatively high strength can be manufactured.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a cross-sectional view for explaining a speaker device according to an embodiment of the present invention.
The speaker device 1 according to the present embodiment includes a convex portion 11 formed at a central portion, and a yoke including a flange portion 12 that is formed on the outer peripheral side of the convex portion 11 and extends radially outward. 13, a ring-shaped magnet 14 placed on the flange portion 12 of the yoke 13, and a ring-shaped plate 15 placed on the magnet 14. The yoke 13, the magnet 14, and the plate 15 form an outer magnet type magnetic circuit (magnetic circuit) 10.

  In the magnetic circuit 10, a magnetic gap 10 g is formed between the inner periphery of the plate 15 and the side surface of the convex portion 11 of the yoke 13. The yoke 13 and the plate 15 are made of a metal material such as iron. The magnet 14 is formed of, for example, a permanent magnet such as neodymium, samarium / cobalt, alnico, or ferrite magnet.

  In the present embodiment, the outer diameters of the ring-shaped magnet 14 and the plate 15 are formed so as to substantially match. Further, the inner diameters of the ring-shaped magnet 14 and the plate 15 are formed so as to substantially coincide with each other. The outer diameters of the magnet 14 and the plate 15 are formed so as to be substantially the same as the outer diameter of the yoke 13 or smaller than the outer diameter of the yoke 13.

  The speaker device 1 includes a substantially cylindrical frame 16 on the outer peripheral side of the magnetic circuit 10, and the frame 16 supports the diaphragm 17. Further, a cover 18 in which a plurality of sound emitting holes 18 a are formed is fixed to the frame 16 so as to be positioned on the acoustic radiation side of the diaphragm 17. The frame 16 is formed so that the inner periphery thereof is substantially the same shape as the outer periphery of the ring-shaped plate 15. In this case, it is preferable to form the frame so that the inner periphery of the frame and the outer periphery of the plate 15 are in contact with each other. In the present embodiment, the outer diameter of the plate 15 and the inner diameter of the frame 16 are formed so as to substantially match.

  The plate 15 is fitted to the frame 16, the outer periphery of the plate 15 is regulated and positioned by the inner periphery of the frame 16, and the yoke 13, the magnet 14, and the plate 15 are fixed by the magnetic force of the magnet 14.

  As will be described later, in the speaker device 1 according to the present embodiment, a substantially cylindrical frame 16 having an inner periphery that is substantially the same shape as the outer periphery of the plate 15 is formed, and the frame 16 and the yoke 13 are at least formed by insert molding. It is integrally formed.

  The yoke 13 according to the present embodiment is formed in a substantially flat plate shape with a metal material, and a hole portion 11 a is formed in a substantially central portion of the convex portion 11. A concave portion is formed on the back surface side of the convex portion 11, and a reinforcing member 60 is formed in the concave portion and the hole 11a by insert molding. A concave portion is formed on the back side in the central portion of the reinforcing member 60, and a terminal portion 19 is provided in the concave portion. The terminal portion 19 is electrically connected to a voice coil 17A, which will be described later, by a conductive wire.

  The diaphragm 17 includes a dome-shaped central diaphragm portion 171, a voice coil bobbin portion 172, and an edge portion 173. The central diaphragm portion 171, the voice coil bobbin portion 172, and the edge portion 173 are integrally formed. As a forming material of the diaphragm 17, various forming materials such as resin, metal, ceramics, and paper can be employed.

The central diaphragm portion 171 according to the present embodiment is formed in a substantially dome shape, and a concave portion 171a is formed in the central portion for thinning.
The voice coil bobbin portion 172 is formed on the outer peripheral side of the central diaphragm portion 171 and the voice coil 17A is disposed. As shown in FIG. 1, the voice coil bobbin portion 172 according to the present embodiment is formed in a U-shaped cross section along the radial direction, and the voice coil 17A is disposed at the bottom thereof. The voice coil 17A is disposed between the magnetic gaps 10g of the magnetic circuit 10 so as to vibrate along the axial direction of the apparatus.

  The edge portion 173 is formed on the outer peripheral side of the voice coil bobbin portion 172, and the outer peripheral end portion 173 a is fixed to the step portion 16 a of the frame 16. The edge portion 173 according to the present embodiment is formed so that the outer peripheral end portion 173 a is fitted to the step portion 16 a of the frame 16.

  The diaphragm 17 is positioned with respect to the frame 16 by fitting the end portion of the edge portion 173 to the step portion 16 a of the frame 16.

  A dome-shaped diaphragm 17 is formed above the convex portion 11 of the yoke 13. A voice coil bobbin part 172 having a U-shaped cross section is formed on the outer peripheral edge of the diaphragm 17, and the voice coil bobbin part 172 is supported by an edge 18. The diaphragm 17, the voice coil bobbin portion 172, and the edge 18 are integrally formed, and a voice coil 17 </ b> A is formed inside the concave portion of the voice coil bobbin portion 172.

  In the speaker device 1 configured as described above, when a sound signal is input as an electrical signal from an external device to the terminal unit 19, the electrical signal is input to the voice coil 17A via a conductive wire (not shown). In the voice coil 17A to which the electric signal is input, an electromagnetic force is generated along the axial direction by the interaction with the magnetic flux between the magnetic gaps 10g, and this electromagnetic force is used as a driving force to vibrate the diaphragm 17.

Next, a method for manufacturing the speaker device 1 having the above configuration will be described with reference to the drawings.
2 and 3 are views for explaining a method of manufacturing the speaker device shown in FIG. 2A is a cross-sectional view of the yoke of the speaker device shown in FIG. 1, and FIG. 2B is a cross-sectional view for explaining an insert molding process of the yoke and the frame. (C) is a figure for demonstrating the process of mounting a magnet and a plate on a yoke, and FIG.2 (D) is a figure for demonstrating the state which mounted the magnet and the plate on the yoke.

  3A is a cross-sectional view for explaining the diaphragm 17 and the frame 16, and FIG. 3B is a cross-sectional view showing a state in which the diaphragm 17 is fixed to the frame 16. FIG. C) is a cross-sectional view for explaining the speaker device 1 in which the cover 18 is fixed on the frame 16.

  First, as shown in FIG. 2A, a yoke 13 having a convex portion 11 and a flange portion 12 is prepared. The yoke 13 is formed in a substantially flat plate shape by, for example, a metal material, and forms the convex portion 11 having the hole 11a and the flange portion 12 by metal processing such as press processing.

  Next, as shown in FIG. 2B, the frame 16 and the yoke 13 are integrally formed by insert molding. At this time, at least an inner peripheral frame 16 having substantially the same shape as the outer periphery of the ring-shaped plate 15 is formed. Further, an inner peripheral frame 16 having substantially the same shape as the outer periphery of the magnet 14 is formed. In this embodiment, as shown in FIG. 1, the magnet 14 and the plate 15 are formed so that the outer diameters thereof substantially coincide with each other, and the frame 16 has an inner diameter as shown in FIGS. It is formed in a cylindrical shape so as to substantially match the outer diameters of the magnet 14 and the plate 15.

  Next, as shown in FIGS. 2 (C) and 2 (D), an unmagnetized ring-shaped magnet 14 and plate 15 are placed in order on the flange portion 12 of the yoke 13, and the plate 15 is framed. The plate 15 is positioned with respect to the frame 16 by the outer periphery of the plate 15 and the inner periphery of the frame 16.

  That is, since the plate 15 is fitted to the frame 16 in a state where the outer periphery of the plate 15 and the inner periphery of the frame 16 are in contact or substantially in contact with each other, the plate 15 is positioned with respect to the frame 16 with high accuracy. The

  Similarly, since the magnet 14 is fitted to the frame 16 in a state where the outer periphery of the magnet 14 and the inner periphery of the frame 16 are in contact with each other or substantially in contact with each other, the magnet 14 is attached to the frame 16 with high accuracy. Positioned.

  With the magnet 14, the plate 15, and the frame 16 configured as described above, the magnet 14 and the plate 15 can be positioned with high accuracy with respect to the frame 16 without using a jig.

  Next, in the state shown in FIG. 3C, the unmagnetized magnet 14 is magnetized by a magnetizing device (not shown) or the like. The yoke 13, the magnet 14, and the plate 15 are fixed by the magnetic force of the magnetized magnet 14. Since the yoke 13, the magnet 14, and the plate 15 are fixed by the magnetic force of the magnet 14 magnetized as described above, the outer magnet type magnetic circuit 10 can be assembled with high accuracy without using an adhesive.

  Next, as shown in FIGS. 3A and 3B, the diaphragm 17 on which the voice coil 17A is arranged is fixed to the frame 16 with an adhesive or the like. In the present embodiment, a step portion 16 a is formed on the frame 16, and the outer peripheral end portion 173 a of the diaphragm 17 is disposed so as to be fitted to the step portion 16 a of the frame 16. In this state, the voice coil 17 </ b> A is disposed so as to freely vibrate between the magnetic gaps 10 g of the magnetic circuit 10. That is, the diaphragm 17 can be fixed to the frame 16 by positioning the diaphragm 17 with respect to the frame 16 without using a jig.

  Further, the reinforcing member 60 is provided with a terminal portion 19, and the voice coil 17 </ b> A and the terminal portion 19 are electrically connected by a conductive wire by a conductive wire (not shown).

  Next, as shown in FIG. 3C, the cover 18 in which a plurality of sound emission holes 18 a are formed is fixed to the frame 16 so as to be positioned on the acoustic radiation side of the diaphragm 17.

  Through the manufacturing process described above, the speaker device 1 according to this embodiment is manufactured.

  FIG. 4 is a cross-sectional view for explaining the magnet 14, the plate 15, and the frame 16. Specifically, FIG. 4A is a diagram for explaining the inner and outer diameters of the magnet 14 and the plate 15, and the inner diameter of the frame 16, and FIG. 4B is the magnet shown in FIG. It is a figure for demonstrating the state which fitted 14 and the plate 15 to the flame | frame 16. FIG.

  In the above-described embodiment, the magnet 14 and the plate 15 are formed in such a shape that the inner diameter and the outer diameter of the magnet 14 and the outer diameter substantially coincide with each other. However, the present invention is not limited to this form. For example, as shown in FIGS. 4 (A) and 4 (B), there are different dimensional tolerances for the outer peripheral dimensions of the magnet 14 and the plate 15 for the convenience of component molding. For example, when the magnet 14 and the plate 15 having the same inner diameter and outer diameter are simply assembled, the inner circumference of the magnet 14 may protrude from the inner circumference of the plate 15 due to dimensional tolerance.

  For this reason, it is preferable to form the inner diameter 141 of the ring-shaped magnet 14 so as to be larger than the dimensional tolerance of the magnet 14 and the plate 15 than the inner diameter 151 of the ring-shaped plate 15. In the present embodiment, as shown in FIG. 4, the inner diameter 141 is formed to be larger than the inner diameter 151 by a specified length d.

  Next, as shown in FIG. 4B, when the magnet 14 and the plate 15 having the above-described configuration are sequentially placed on the yoke 13, even if the plate 15 and the magnet 14 are displaced due to dimensional tolerances, the inner circumference of the magnet 14 will be described. However, it can be formed so that it is always located radially outside the inner periphery of the plate 15. That is, even if there is a dimensional tolerance, the magnet 14 and the plate 15 can be arranged on the yoke 13 with high accuracy, and the high-quality magnetic circuit 10 can be manufactured.

  FIG. 5 is a cross-sectional view of a speaker device 1a according to another embodiment of the present invention. In the above-described embodiment, the magnet 14 and the plate 15 are formed in such a shape that the inner diameter and the outer diameter thereof are substantially the same. For example, as shown in FIG. 5, the outer diameters of the magnet 14a and the plate 15a are different. Also good. In the present embodiment, the outer diameter of the plate 15 is larger than the outer diameter of the magnet 14. At this time, the frame 16 </ b> A forms an inner peripheral portion in contact with the outer periphery of the magnet 14 and a portion in contact with the outer periphery of the plate 15. With the above configuration, the magnet 14a and the plate 15a can be aligned with respect to the frame 16A with high accuracy without using a jig.

  FIG. 6 is a diagram for explaining a magnetizing apparatus 200 that magnetizes the unmagnetized magnet 14 of the magnetic circuit 10.

  When magnetizing the unmagnetized magnet 14 shown in FIG. 2 (D), for example, as shown in FIG. The magnetizing device 200 is composed of a relatively large coil. For example, as shown in FIG. 6, the magnetic circuit 10 is disposed in the concave portion 200 </ b> A, and a large voltage and a large current are applied by the power supply device 210 through the conductive wire 220. Supply. The power supply device 210 is composed of, for example, an assembly of relatively large capacitors, and can store a large voltage of about 2000 V and a large current of about 5000 A necessary for magnetization in the capacitor. In the power supply device 210, when a switch (not shown) is turned on, the stored power flows to the coil of the magnetizing device 200 via the conductive wire 220, and a strong magnetic field is generated by the coil. The magnet 14 of the magnetic circuit 10 installed in the concave portion 200A is magnetized by the strong magnetic field.

  As described above, the manufacturing method of the speaker device 1 according to the present embodiment includes the outer magnet type magnetic circuit 10 in which the ring-shaped magnet 14 and the plate 15 are placed on the yoke 13 in order, and the outer magnet type magnetic circuit. 10 is a manufacturing method of the speaker device 1 having a frame 16 that is formed on the outer peripheral side of the plate 10 and supports the diaphragm 17, and forms an inner peripheral frame 16 that is at least substantially the same shape as the outer periphery of the plate 15. A step of integrally forming the frame 16 and the yoke 13 by insert molding, an unmagnetized ring-shaped magnet 14 and a plate 15 are sequentially placed on the yoke 13 and the plate 15 is fitted to the frame 16; The step of positioning the plate 15 with respect to the frame 16 by the outer periphery of the plate 15 and the inner periphery of the frame 16, and the magnet 1 And fixing the yoke 13, the magnet 14, and the plate 15 by the magnetic force of the magnet 14, so that the plate 15 can be positioned with respect to the frame 16 with high accuracy without using a jig, for example. can do.

  Moreover, since the speaker apparatus 1 can be produced without using a jig, the equipment cost can be reduced as compared with the conventional case.

  Further, when assembling the outer magnet type magnetic circuit 10, the magnet 14 is fitted to the frame 16 and positioned with respect to the frame 16 by the outer periphery of the magnet 14 and the inner periphery of the frame 16. Without using the magnet 14, the magnet 14 can be positioned with respect to the frame 16 with high accuracy.

  Further, since the magnet 13, which is not magnetized, is magnetized, and the yoke 13, the magnet 14, and the plate 15 are fixed by the magnetic force of the magnet 14, the outer magnet type magnetic circuit 10 can be made highly accurate without using an adhesive. Can be assembled.

  Further, after magnetizing the magnet 14, the diaphragm 17 on which the voice coil 17A is arranged is attached to the frame 16 so that the voice coil 17A is positioned in the magnetic gap of the outer magnet type magnetic circuit 10 assembled with high accuracy. By fixing, even when the magnetic circuit is assembled without using an adhesive, the plate 15 and the magnet 14 are arranged at the specified position with respect to the yoke 13 without deviating from the specified position. The diaphragm 17 can be disposed on the surface.

  The yoke 13 is formed of a metal material in a substantially flat plate shape, and has a convex portion 11 having a hole 11a and a flange portion 12 formed on the outer peripheral side of the convex portion 11, By forming the reinforcing member 60 on the back surface side of the convex portion 11 of the yoke 13 and the hole portion 11a at the time of molding, the small speaker device 1 having relatively high strength can be manufactured.

  Moreover, workability and productivity can be improved.

  In the magnetic circuit 10 described above, since the yoke 13, the magnet 14, and the plate 15 are not integrally injection-molded, it is easy to change the design of the yoke 14, the plate 15, and the like.

  Further, as described above, the outer magnet type magnetic circuit 10 in which the ring-shaped magnet and the plate are placed on the yoke 13 in this order, and the diaphragm 17 is formed on the outer peripheral side of the outer magnet type magnetic circuit 10. The speaker device 1 includes a frame 16 to be supported, and the frame 16 and the yoke 13 are integrally formed by insert molding, and at least the outer periphery of the ring-shaped plate 15 is formed in substantially the same shape as the inner periphery of the frame 16. Since the plate 15 is fitted to the frame 16 and the outer periphery of the plate 15 is regulated and positioned by the inner periphery of the frame 16, the yoke 13, the magnet 14, and the plate 15 are fixed by the magnetic force of the magnet 14. The high-quality speaker device 1 in which the plate 15 is positioned with high accuracy can be provided. Moreover, the small speaker apparatus 1 with comparatively large intensity | strength can be provided.

  The present invention is not limited to the embodiment described above. For example, you may implement the speaker apparatus and magnetic circuit which concern on this invention combining the embodiment mentioned above.

  In the embodiment described above, the diaphragm 17 includes the central diaphragm portion 171, the voice coil bobbin portion 172, and the edge portion 173, but is not limited to this form.

  In the above embodiment, the magnetic circuit 10 is formed without using an adhesive, but the present invention is not limited to this form. For example, the yoke 13, the magnet 14, and the plate 15 may be fixed with an adhesive. Even in this case, the magnetic circuit 10 can be assembled without using a jig.

  Further, when a punching taper for molding is provided on the inner periphery of the frame, the outer diameters of the plate 15 and the magnet 14 may be set differently depending on the taper shape even if there is no step.

  In the above-described embodiment, the magnet 13 and the plate 15 are assembled on the yoke 13 and then magnetized. However, the present invention is not limited to this embodiment. For example, the magnetized magnet 14 may be placed on the yoke 13.

It is sectional drawing for demonstrating the speaker apparatus which concerns on one Embodiment of this invention. It is a figure for demonstrating the manufacturing method of the speaker apparatus shown in FIG. 2A is a sectional view of the yoke of the speaker device shown in FIG. 1, FIG. 2B is a sectional view for explaining an insert molding process of the yoke and the frame, and FIG. It is a figure for demonstrating the process mounted on a yoke, and FIG.2 (D) is a figure for demonstrating the state which mounted the magnet and the plate on the yoke. It is a figure for demonstrating the manufacturing method of the speaker apparatus shown in FIG. (A) is a cross-sectional view for explaining the diaphragm 17 and the frame 16, (B) is a cross-sectional view showing a state in which the diaphragm 17 is fixed to the frame 16, and (C) is a view on the frame 16. It is sectional drawing for demonstrating the speaker apparatus 1 to which the cover 18 was fixed to. 4 is a cross-sectional view for explaining a magnet 14, a plate 15, and a frame 16. FIG. (A) is a figure for demonstrating the internal diameter and outer diameter of the magnet 14 and the plate 15, and the internal diameter of the flame | frame 16, (B) is fitting the magnet 14 and the plate 15 shown to (A) to the flame | frame 16. It is a figure for demonstrating the state which carried out. It is sectional drawing of the speaker apparatus 1a which concerns on other embodiment of this invention. 2 is a diagram for explaining a magnetizing apparatus 200 that magnetizes an unmagnetized magnet 14 of a magnetic circuit 10. FIG.

Explanation of symbols

1 Speaker device 10 Magnetic circuit (outer magnet type magnetic circuit)
DESCRIPTION OF SYMBOLS 11 Convex part 12 Flange part 13 Yoke 14 Magnet 15 Plate 16 Frame 17 Diaphragm 17A, Voice coil 18 Cover 18A Sound emission part 19 Terminal part 60 Reinforcement member 171 Central diaphragm part 172 Voice coil bobbin part 173 Edge part 200 Magnetization Device 210 Power supply device 220 Conductive wire

Claims (9)

A method of manufacturing a speaker device comprising: an outer magnet type magnetic circuit in which a ring-shaped magnet and a plate are placed in order on a yoke; and a frame formed on the outer peripheral side of the outer magnet type magnetic circuit and supporting a diaphragm. Because
Forming at least the inner frame substantially the same shape as the outer periphery of the plate, and integrally forming the frame and the yoke by insert molding;
The unmagnetized ring-shaped magnet and the plate are placed on the yoke in order, and the plate is fitted to the frame. The outer periphery of the plate and the inner periphery of the frame are used to place the plate relative to the frame. A step of positioning;
Magnetizing the magnet, and fixing the yoke, the magnet, and the plate by the magnetic force of the magnet.   The method for manufacturing a speaker device according to claim 1, wherein the magnet is fitted to the frame and positioned with respect to the frame by an outer periphery of the magnet and an inner periphery of the frame.   After magnetizing the unmagnetized magnet, the diaphragm on which the voice coil is arranged is fixed to the frame so that the voice coil is positioned in the magnetic gap of the outer magnet type magnetic circuit. The manufacturing method of the speaker apparatus of Claim 1. The yoke is formed in a substantially flat plate shape with a metal material, and has a convex portion provided with a hole, and a flange portion formed on the outer peripheral side of the convex portion,
The method for manufacturing a speaker device according to claim 1, wherein a reinforcing member is formed on the back surface side of the convex portion and the hole portion by the insert molding. A speaker device comprising: an outer magnet type magnetic circuit in which a ring-shaped magnet and a plate are placed in order on a yoke; and a frame that is formed on the outer peripheral side of the outer magnet type magnetic circuit and supports a diaphragm. ,
By insert molding, the frame and the yoke are integrally formed, and at least the outer periphery of the ring-shaped plate is formed in substantially the same shape as the inner periphery of the frame, and the plate is fitted to the frame, and A speaker device, wherein an outer periphery of a plate is regulated and positioned by an inner periphery of a frame, and the yoke, the magnet, and the plate are fixed by a magnetic force of the magnet.   The speaker device according to claim 5, wherein the magnet is fitted to the frame and positioned with respect to the frame by an outer periphery of the magnet and an inner periphery of the frame.   The magnet is placed on the yoke in an unmagnetized state at the time of assembly, and magnetized in a state where the plate is placed on the magnet, whereby the yoke, the magnet, The speaker device according to claim 5, wherein the plate is fixed.   The yoke is formed of a metal material in a substantially flat plate shape, and has a convex portion having a hole and a flange portion formed on the outer peripheral side of the convex portion, and the convex portion of the yoke The speaker device according to claim 5, wherein a reinforcing member is formed on a back surface side of the substrate and the hole. The speaker device according to claim 5, wherein an inner diameter of the ring-shaped magnet is at least larger than a dimensional tolerance than an inner diameter of the ring-shaped plate.

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