JP2005159985A - Speaker apparatus and manufacturing method thereof - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a speaker apparatus capable of enhancing caulking strength between a pot type yoke and a frame or the like. <P>SOLUTION: The speaker apparatus includes the pot type yoke with a bottom and a main body part, and the frame. The bottom has a mount part, on the upper side of which a magnet and a plate are mounted. The main body part includes a cylindrical part connected to the bottom, a flange with a prescribed area, and a plurality of projections formed on its upper side. On the other hand, the frame has a flat region being a flat face and a plurality of openings are formed in the flat region so as to be correspondent to the positions of the projections. The plurality of projections are inserted into the plurality of openings of the frame, and the upper ends of the projections are deformed by a caulking tool. Thus, the frame is clamped by the projections deformed by caulking and the upper face of the flange so that the coupling between the pot type yoke and the frame is very high. Thus, the caulking strength between the pot type yoke and the frame can be improved and a heavy magnetic circuit system can be supported in a stable state. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a structure of a yoke of a speaker device.

  Conventionally, various speaker devices are known in which a magnetic circuit system such as a yoke is caulked to a vibration system such as a frame to improve the coupling strength between them.

  For example, a speaker device is known in which a part of an outer peripheral edge of a cylindrical yoke is crushed so that the cylindrical yoke is crimped to a frame. In addition, as this type of speaker device, for example, a crimping portion is provided on the outer periphery of the yoke, the crimping portion is inserted into a hole portion of the frame, and the crimping portion is expanded in the hole portion. A speaker unit formed by coupling a yoke and a frame is known (for example, see Patent Document 1).

  Also, the yoke is fixed to the frame by providing a plurality of protrusions on the yoke, inserting the protrusions into openings of a predetermined shape formed on the frame, and rotating the yoke and the frame relatively. A speaker device is known.

  A resin frame type speaker is known in which a dowel formed on a plate is inserted into a fixed region of a frame and caulked to join the frame and the plate (see, for example, Patent Document 2).

  However, in the case of the above speaker device in which a part of the outer peripheral edge of the yoke is crimped to the frame, since only a part of the outer peripheral edge of the yoke is crimped to the frame, the coupling strength between the yoke and the frame is not so high. . Moreover, in the case of such a speaker device, it is necessary to prepare a dedicated caulking jig.

  Further, in the case of the above speaker device in which the yoke and the frame are relatively rotated to fix the yoke to the frame, the yoke rotates in the direction opposite to the rotation direction when affected by vibration, and the yoke is the frame. May leave. Therefore, it cannot be said that such a speaker device has such a strong coupling strength between the yoke and the frame as the above speaker device. Moreover, in the case of such a speaker device, since it is necessary to relatively rotate the yoke and the frame, work is required if performed manually, and a dedicated device is required for automation.

JP 2002-10392 A JP-A-11-205896

  Examples of problems to be solved by the present invention include the above. It is an object of the present invention to provide a speaker device capable of improving the caulking strength between the pot type yoke and the frame and a manufacturing method thereof.

  The invention according to claim 1 is a speaker device, comprising a magnet, a bottom portion on which the magnet is placed, a cylindrical portion extending from the outer periphery of the bottom portion to the vicinity of the top surface position of the magnet, and the cylindrical portion A crucible-shaped yoke including a flange portion extending outward from the upper end of the magnet, a magnetic circuit having a plate placed on the magnet, and a frame attached to the flange portion, A convex portion is formed on the upper surface of the flange portion, and an opening is formed in the frame at a position corresponding to the convex portion. The convex portion is inserted into the opening, and the convex The magnetic circuit is attached to the frame with the portion deformed.

The invention according to claim 5 is a method of manufacturing a speaker device, the step of forming a pot type yoke having a flange portion and a convex portion formed on the upper surface of the flange portion;
A step of attaching the frame to the flange portion by deforming the convex portion with a caulking device in a state where the frame is placed on the upper surface of the flange portion.

  In one embodiment of the present invention, a speaker device includes a magnet, a bottom portion on which the magnet is placed, a cylindrical portion extending from the outer periphery of the bottom portion to the vicinity of the upper surface position of the magnet, and an upper end of the cylindrical portion. A flange portion extending outward from the flange portion, a magnetic circuit having a plate placed on the magnet, and a frame attached to the flange portion, the flange portion A convex portion is formed on the upper surface of the frame, an opening is formed in the frame at a position corresponding to the convex portion, the convex portion is inserted into the opening, and the convex portion is The magnetic circuit is attached to the frame in a deformed state.

  In the above speaker device, a plurality of convex portions are formed on the upper surface of the flange portion of the pot type yoke. And these convex parts are inserted in the opening part of a flame | frame, and the magnetic circuit is attached to the flame | frame with the upper end part of those convex parts deform | transformed.

  Therefore, as compared with a conventional speaker device in which a part of the outer peripheral edge portion of the yoke is crushed or the like and the yoke is crimped to the frame, the speaker device has a very large coupling between the pot type yoke and the frame. Therefore, it is possible to improve the caulking strength between the pot type yoke and the frame, and it is possible to hold a heavy magnetic circuit in a stable state.

  Further, the above caulking mechanism can be applied to an external magnet type speaker device. In general, an external magnet type speaker device has a configuration in which a plate is attached to a frame instead of a pot type yoke. Therefore, if a plurality of convex portions are formed on the plate at the same position as the plurality of convex portions formed on the pot type yoke as described above, the convex portions formed on the plate can also be formed on the outer magnet type speaker device. The plate can be attached to the frame by crimping the part. As a result, the frame can be shared as a standard part for the inner-magnet-type and outer-magnet-type speaker devices, and the caulking jig (including the caulking blade) can be shared.

  In one aspect of the speaker device described above, the frame is sandwiched between the convex portion in which the upper end portion is deformed and the upper surface of the flange portion. Therefore, the frame is securely fixed by the flange portion and the deformed convex portion. Thereby, the caulking strength between the pot type yoke and the frame can be improved, and a heavy magnetic circuit can be held in a stable state.

  In the other one aspect | mode of said speaker apparatus, the said flame | frame and the said flange part are closely_contact | adhered. Thereby, since a gap does not occur between the frame and the flange portion, the coupling strength between the frame and the flange portion can be increased.

  In another aspect of the above speaker device, an opening for positioning a caulking blade of the caulking device and a caulking portion of the convex portion is formed in the bottom portion. According to this aspect, for example, by inserting a positioning projection provided on the caulking device into the opening, the caulking blade of the caulking device can be accurately positioned at the caulking portion of the convex portion of the pot type yoke. it can.

  In another embodiment of the present invention, a method of manufacturing a speaker device includes a step of forming a pot type yoke having a flange portion and a convex portion formed on the upper surface of the flange portion, and a frame on the upper surface of the flange portion. And mounting the frame on the flange portion by deforming the convex portion with a caulking device.

  According to the above method for manufacturing a speaker device, first, the flange portion and the pot type yoke having a plurality of convex portions formed on the upper surface of the flange portion are formed. And the upper end part of the convex part formed in the upper surface of a flange part is deform | transformed using a crimping apparatus (for example, jig | tool for crimping etc.). In addition, if a positioning mechanism is provided in the crimping device, the crimping site on the upper surface of the convex portion can be accurately crimped. Therefore, in a state where the frame is placed on the upper surface of the flange portion, the frame can be attached to the flange portion by deforming the upper end portion of the convex portion with the caulking device. In the speaker device manufactured by this method, since the coupling strength between the pot type yoke and the frame is increased, the caulking strength between the pot type yoke and the frame can be improved, and a heavy magnetic circuit is in a stable state. Can be held in.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. In the present invention, a plurality of convex portions are provided on the flange portion of the pot type yoke, and each of the convex portions is crimped to the frame by a caulking jig, and the pot type yoke is attached to the frame. Thereby, the caulking strength between the pot type yoke and the frame is improved.

[Configuration of speaker device]
1 and 2 schematically show a schematic configuration of a speaker device 100 according to an embodiment of the present invention. In addition, the speaker apparatus 100 of a present Example can be used suitably as a vehicle-mounted speaker. FIG. 1A shows a plan view of the speaker device 100. FIG.1 (b) has shown sectional drawing along the cutting line AA 'of the speaker apparatus 1 in Fig.1 (a). FIG. 2A shows a rear view of the speaker device 100. FIG. 2B shows a side view of the speaker device 100 in FIG. Hereinafter, the configuration and the like of the speaker device 100 according to the present embodiment will be described with reference to FIGS.

  As shown in FIG. 1B, the speaker device 100 mainly includes a frame 8, a diaphragm 1, a damper 2, a voice coil bobbin 3 and a voice coil 4, a pot type yoke 5, a magnet 6 and A magnetic circuit system 11 having a plate 7 and other various members are provided. The speaker device 100 is a speaker device of a type generally called double voice or dual voice, and can emit sound with a high volume output.

  First, each component of the vibration system 10 will be described.

  The diaphragm 1 is a so-called cone-shaped diaphragm, and is bonded to and joined to a separate edge portion 1a or integrally formed with the edge portion 1a. Various materials such as paper, polymer, and metal can be applied to the diaphragm 1 according to various applications. The outer peripheral edge portion of the diaphragm 1, that is, the lower end portion of the edge portion 1 a is fixed to the upper surface of the outer peripheral edge portion of the frame 8. Since various components of the speaker device 100 are fixed to the frame 8 and also serve to support the speaker device 100, it is preferable to use a strong metal material. On the other hand, the inner peripheral edge of the diaphragm 1 is fixed in the vicinity of the upper end of the outer peripheral wall of the voice coil bobbin 3.

  The damper 2 is made of, for example, a cloth material in which a plurality of corrugations are formed. In the speaker device 100 of this example, a plurality of dampers 2 are provided. As a result, the voice coil bobbin 3 having a large driving force can be movably supported. The inner peripheral edge of each damper 2 is fixed to the outer peripheral wall of the voice coil bobbin 3. On the other hand, the outer peripheral edge of each damper 2 is fixed to the inner surface of the frame 8.

  The voice coil bobbin 3 has an opening on the lower surface and has a substantially cylindrical shape. A voice coil 4 is wound around the outer wall of the lower end portion of the voice coil bobbin 3. The outer peripheral wall of the lower end portion of the voice coil bobbin 3 is opposed to the inner peripheral wall of the pot type yoke 5 having an opening on the upper surface with a certain distance. On the other hand, the inner peripheral wall of the voice coil bobbin 3 is opposed to the outer peripheral wall of the annular plate 7 and the outer peripheral wall of the annular magnet 6 having a size slightly smaller than the annular plate 7 with a certain distance therebetween. . As a result, a gap (magnetic gap 20) is formed between the outer peripheral wall of the plate 7 and the inner peripheral wall of the pot type yoke 5.

  The voice coil 4 is composed of two independent voice coils 4a and 4b (see FIG. 3). Two sets of electrical signals for one channel are input to the two voice coils from the amplifier side. For example, when the speaker device 100 is used for the L channel, the same L channel audio signal is input to the two voice coils 4a and 4b, respectively. The voice coil 4 has two sets of plus / minus lead terminals, and each lead terminal is electrically connected to the two sets of tinsel wires 9 at predetermined positions of the diaphragm 1. The positive lead terminal is an input terminal for an L channel signal, and the negative lead terminal is an input terminal for a ground (GND) signal.

  Next, each component of the magnetic circuit system 11 will be described.

  The magnetic circuit system 11 is configured as an internal magnet type magnetic circuit system. This magnetic circuit includes an annular magnet 6, an annular plate 7 disposed so as to overlap the upper portion of the magnet 6, and a pot type yoke 5 that accommodates them. In the magnetic circuit system 11, the magnet 6 and the plate 7 constitute a magnetic circuit, and the magnetic flux of the magnet 6 is concentrated in the magnetic gap 20 formed between the outer peripheral surface of the plate 7 and the inner peripheral surface of the pot type yoke 5. ing. The pot type yoke 5 is attached to the frame 8 in a crimped state. Thereby, the magnet 6 and the plate 7 which are the components of the magnetic circuit system 11 are held in a stable state. The configuration of the pot type yoke 5 having a feature in the caulking mechanism will be described later.

  Next, various components will be described.

  Various components include members such as a dust cap 12, a packing 13, a buffer member 14, and a wire harness 15.

  The dust cap 12 has a dome shape. The outer peripheral edge of the dust cap 12 is fixed in the vicinity of the inner peripheral edge of the diaphragm 1. For this reason, the dust-proof cap 12 functions to prevent foreign matters such as dust from entering the magnetic circuit system 11 and the like.

  The packing 13 has a ring shape and is an insulating member. As a material of the packing 13, for example, a material such as a resin is suitable. The lower surface of the packing 13 is fixed to the upper surface of the outer peripheral edge of the frame 8.

  The shock-absorbing member 14 has a function as a shock-absorbing material when the speaker device 100 is attached to a predetermined position of the vehicle, and also functions to prevent external vibration from being transmitted to the main body of the speaker device 100. It is a member. For this reason, as a material of the buffer member 14, for example, a member such as a sponge having cushioning properties is suitable. Further, the buffer member 14 has a rod shape, and an adhesive is applied to one side or a double-sided tape is attached. The buffer member 14 is attached to the upper surface of the packing 13 via its adhesive or double-sided tape in a state of being deformed in an annular shape.

  The wire harness 15 is a four-wire wiring, and outputs an electrical signal for one channel output from the amplifier to the voice coil 4 via each tinsel wire 9. One end of the wire harness 15 is connected to the connection terminal 16 by the solder 17, and the other end of the wire harness 15 is connected to the connector terminal 18. Thereby, the wire harness 15, the tinsel wire 9, and the voice coil 4 are electrically connected.

  Next, a method for supplying an electric signal to the speaker device 100 will be briefly described with reference to FIG. The electric signal is supplied to the speaker device 100 through the acoustic source 30, the amplifier 31, the amplifier 32, and the like. The sound source 30 corresponds to a CD (Compact Disc) player, an MD (Mini Disc) player, or the like. The acoustic source 30 outputs audio signals for one channel of the L channel (or R channel) to the amplifiers 31 and 32, respectively (signal S1). For example, when the speaker device 100 is used for the L channel, the amplifier 31 and the amplifier 32 amplify the output L channel audio signal with a predetermined amplification factor, and pass through each of the tinsel wires 9 and the like. , Output to each of the voice coils 4a and 4b. For this reason, the speaker device 100 can emit a high-volume output.

  In the speaker device 100 described above, when an electric signal is input from the amplifier side to the wire harness 15, the electric signal is transmitted to the voice coil 4 via the connection terminal 16, the tinsel wire 9, and the lead terminal of the voice coil 4. Supplied. As a result, a driving force is generated in the voice coil 4 in the magnetic gap 20, and the diaphragm 1 is vibrated in the axial direction of the speaker device 100. Thus, the speaker device 100 generates sound in the direction of the arrow 50 shown in FIGS. 1 (b) and 2 (b).

[Configuration of acupoint type yoke]
Next, with reference to FIGS. 4 to 6, the configuration of the pot type yoke 5 having the caulking mechanism that characterizes the present invention will be described in detail. FIG. 4 is an enlarged cross-sectional view of a region E1 in FIG. FIG. 5A shows a plan view of the pot type yoke 5. FIG. 5B is a cross-sectional view taken along the cutting line CC ′ of the pot type yoke 5 in FIG. FIG. 6 shows a rear view of the frame 8.

  As shown in FIG. 4, the pot type yoke 5 of the present invention is attached to the frame 8 in a state where a plurality of convex portions 52c formed on the flange portion 52b are crimped by a crimping jig (not shown). Thereby, the magnet 6 and the plate 7 which are the components of the magnetic circuit system 11 are held in a stable state.

  The pot type yoke 5 has a bottom 51 and a main body 52, which are connected to each other.

  As shown in FIG. 5 (b), the bottom 51 has a cross-sectional shape that is the reverse of the substantially concave shape. The bottom 51 includes a mounting portion 51a for mounting the magnet 6 and the plate 7, an opening 51ab formed at the center of the mounting portion 51a, and an outer peripheral edge connected to one inner peripheral edge 52d of the cylindrical portion 52a. 51b, which are integrally formed. The upper surface of the mounting portion 51a is a flat surface, and the diameter of the mounting portion 51a is substantially the same as the diameters of the magnet 6 and the plate 7 as shown in FIG. Thereby, the mounting part 51a mounts the magnet 6 and the plate 7 in a stable state. The magnet 6 and the plate 7 are fixed to the upper surface of the placement portion 51a via an adhesive element. The opening 51ab is used as a positioning hole when the crimping portion of the convex portion 52c of the pot type yoke 5 is accurately crimped to the frame 8 by a crimping jig. Further, it is used as a positioning opening in the step of attaching various components in step S4 of FIG.

  The main body 52 has a cylindrical part 52a, a flange part 52b, and a convex part 52c that protrudes upward from the upper surface of the flange part 52b, and these are integrally formed. The cylindrical portion 52a has a substantially cylindrical shape. One inner peripheral edge 52 d of the cylindrical part 52 a is connected to the outer peripheral edge 51 b of the bottom 51. As shown in FIGS. 4 and 5B, the cylindrical portion 52a extends upward from a position near the inner peripheral edge portion 52d to a position near the plate 7, and the flange portion 52b is cylindrical from the position. It extends outward in a direction substantially perpendicular to the portion 52a. Further, when viewed from above, the flange portion 52b has a shape as shown in FIG. 5A, a predetermined area, and a flat upper surface. The convex portion 52c has a cylindrical shape, and a plurality of convex portions 52c are formed on the upper surface of the flange portion 52b.

  On the other hand, as shown in FIG. 6, the frame 8 includes a flat region 8a (in a broken line region) in which flatness is ensured and a plurality of openings 8b formed in the flat region 8a.

  As described above, in the pot type yoke 5 having such a configuration, as shown in FIG. 4, the convex portion 52 c is crimped to the frame 8 by a crimping jig (not shown). As a result, the convex portion 52c is deformed, and the pot type yoke 5 is attached to the frame 8 with the frame 8 being sandwiched between the deformed convex portion 52c and the upper surface of the flange portion 52b. Note that the upper surface of the flange portion 52 b of the pot type yoke 5 is in close contact with the flat region 8 a of the frame 8.

  Therefore, when compared with a conventional speaker device, for example, a speaker device having a mechanism in which a part of the outer peripheral edge of the yoke is crushed and the yoke is caulked into the frame, the speaker device 100 of the present invention is different from the pot type yoke 5. Coupling with the frame 8 is extremely strong. Therefore, the caulking strength between the pot type yoke 5 and the frame 8 can be improved, and even the heavy magnetic circuit system 11 can be held in a stable state.

  Further, when the caulking mechanism of the present invention is applied to an outer magnet type speaker device, the following effects can be obtained. In the speaker device 100 of the present invention which is an internal magnet type, as described above, a plurality of convex portions 52c are formed on the flange portion 52b of the pot type yoke 5, and the convex portions 52c are caulked to the frame 8 so that the pot type yoke 5 is attached to the frame. 8 is attached. On the other hand, the outer-magnet type speaker device is generally configured to attach a plate to the frame instead of the pot type yoke 5. Therefore, if a plurality of protrusions are also formed on the plate at the same position as the plurality of protrusions 52c formed on the pot type yoke 5, the protrusions formed on the plate can be used as a frame in the outer magnet type speaker device. By caulking, the plate can be securely attached to the frame. As a result, the frame can be shared as a standard part for the inner-magnet-type and outer-magnet-type speaker devices, and the caulking jig (including the caulking blade) can also be shared.

[Method of manufacturing speaker device]
Next, a method for manufacturing the speaker device 100 will be described with reference to FIGS. FIG. 7 shows a flowchart of the manufacturing method of the speaker device 100. 8 and 9 show an example of the manufacturing process of the pot type yoke 5. FIG. 10 shows an example of a process (caulking process) for attaching the pot type yoke 5 to the frame 8.

  First, the pot type yoke 5 is manufactured (step S1). Specifically, the main body 52 and the bottom 51, which are the components, are separately manufactured, and then the pot type yoke 5 is manufactured by connecting them. Such a manufacturing method will be described with reference to FIGS.

  FIG. 8A schematically shows a manufacturing process of the bottom 51 of the pot type yoke 5. The bottom 51 is manufactured by forging a base material made of a metal material such as iron. Specifically, the base material 300 is formed into a substantially concave cross-sectional shape similar to that of the bottom portion 51 by a plurality of forging steps (P10 to P12) as shown in step P14. In step P14, the outer peripheral edge 303 is cut, and the outer peripheral edge 51b and the opening 51ab are formed. Thus, the bottom 51 is manufactured.

  FIG. 8B schematically shows a process of manufacturing the main body 52 of the pot type yoke 5. The main body 52 is also basically manufactured by forging a base material made of a metal material. Specifically, the base material 800 is made into a material 805 having a substantially acupoint shape by a plurality of forging steps (P20 to P22) (see step P24). In this process P24, the convex part 52c is formed in the flange part 52b by forging, or by the set of molds M1 and M2 shown in FIG. 8C or FIG. 8D (first manufacturing method of convex part). . In step P26, the bottom portion 810 of the material 805 is punched out by press punching. Thereby, as shown to process P26 of FIG.8 (b), the bottom part 810 of the material 805 is isolate | separated.

  Next, in process P28, the bottom portion 810 is punched (shown by a broken line 820), and the bottom portion 51 is processed into a mountable state. Thus, the main body 52 is manufactured as shown in Step P28 of FIG.

  Next, as shown in FIG. 9B, the manufactured main body 52 and the manufactured bottom 51 are connected. Specifically, the bottom 51 is press-fitted into the main body 52 so that the inner peripheral edge 52d of the main body 52 abuts the outer peripheral edge 51b of the bottom 51 corresponding to the position, and the lower end of the main body 52 The bottom part 51 is fixed to the main body part 52 by caulking the part 825 (see step P28 in FIG. 8B). In this way, the above pot type yoke 5 is manufactured.

  Next, the 2nd manufacturing method of a convex part is demonstrated. FIG. 9A shows a second manufacturing method of the convex portion 52c. In this method, the convex portion 52c is formed simultaneously with the press punching step P26 of FIG. The state of this punching process is schematically shown in FIG. In FIG. 9A, the material 805 with the bottom 810 attached is pressed between the die 73 and the stripper plate 72, the punch 71 is moved in the direction of the arrow, and the bottom 810 is punched out. Thereby, as shown in step P26 of FIG. 8B, the bottom portion 810 of the material 805 is separated, and the convex portion 52c is formed. In the second manufacturing method of the convex portion 52c, the convex portion 52c is simultaneously formed on the flange portion 52b at the time of the punching process, so that the convex portion is formed on the die 73 as shown in FIG. 73a is formed, and the stripper plate 72 has a recess 72a. Therefore, when the bottom portion 810 is punched from the material 805, a plurality of convex portions 52c can be formed on the flange portion 52b.

  Next, the 3rd manufacturing method of a convex part is demonstrated. In the third manufacturing method of the convex portion 52 c, the convex portion 52 c is formed when the bottom portion 51 is press-fitted into the main body portion 52. That is, in the process P26 shown in FIG. 8B, that is, when the bottom portion 810 is punched from the material 805, the convex portion 52c is not formed, and the bottom portion 51 is press-fitted into the main body portion 52 as shown in FIG. At this point, the protrusion 52c is not formed. When the bottom 51 is press-fitted into the main body 52, the convex portion 52c is formed simultaneously. Therefore, when the convex part 52c is formed by the second manufacturing method, the die 73 and the stripper plate 72 used in the punching process in the process P26 have the convex part 73a and the concave part 72a as shown in FIG. Shall not have.

  Next, returning to FIG. 7, the manufactured pot type yoke 5 is attached to the frame 8 (step S2). Specifically, first, as shown in FIG. 10A, while inserting the convex portion 52c of the pot type yoke 5 into the opening 8b of the frame 8, the upper surface of the flange portion 52b of the pot type yoke 5 and the frame 8 are inserted. Are brought into close contact with the flat region 8a. Next, as shown in FIG. 10A, while the caulking jig 400 is lowered from the upper position, the positioning projection 402 is inserted into the opening 51ab of the pot type yoke 5, and the protrusion 52c Accurate positioning of the crimped part on the top surface. Thereby, the crimping part of the upper surface of the convex part 52c and the crimping blade 401 with a conical tip are in contact.

  Next, as shown in FIG. 10 (b), the convex portion 52 c is crimped to the frame 8 by the crimping blade 401 while the crimping jig 400 is further lowered from the position. Next, as shown in FIG. 10C, the caulking jig 400 is retracted to the upper position. In this way, the pot type yoke 5 is attached to the frame 8, and the frame 8 is sandwiched by the deformed convex portion 52c and the upper surface of the flange portion 52b.

  Next, returning to FIG. 7, the magnet 6 and the plate 7 are accommodated in the pot type yoke 5 (step S3). Specifically, the magnet 6 and the plate 7 integrated by the adhesive element are placed so that the upper surface of the placement portion 51 a of the manufactured pot type yoke 5 and the lower surface of the magnet 6 are in contact with each other. At this time, the lower surface of the magnet 6 and the upper surface of the placement portion 51a are fixed via an adhesive element. At this time, the gap (gap) between the magnet 6 and the plate 7 integrated with a gap gauge (not shown) and the magnetic gap 20 formed between the pot type yoke 5 is made constant over the entire circumference. Next, various other components of the speaker device 100 are attached to the frame 8 or the like (step S4). Thus, the speaker device 100 shown in FIGS. 1 and 2 is manufactured.

The top view and sectional drawing of the speaker apparatus which concern on the Example of this invention are shown. The rear view and side view of the speaker apparatus which concern on the Example of this invention are shown. A method for supplying an electric signal to a speaker device is shown as a block diagram. Sectional drawing which expanded the coupling state of the pot type | mold yoke and a flame | frame is shown. The top view and sectional drawing of a pot type yoke are shown. The rear view of a flame | frame is shown. The flowchart of the manufacturing method of the speaker apparatus which concerns on the Example of this invention is shown. Sectional drawing of the manufacturing process of a pot type yoke is shown typically. Sectional drawing of the manufacturing process of a pot type yoke is shown typically. Sectional drawing of the process of crimping the convex part of a pot type yoke to a flame | frame is shown typically.

Explanation of symbols

5 Acupoint Type Yoke 6 Magnet 7 Plate 8 Frame 10 Vibration System 11 Magnetic Circuit System 51 Bottom 52 Body 8a Flat Area 8b Opening 52a Cylindrical 52b Flange 52c Protrusion 100 Speaker Device 200 Press Device 400 Caulking Jig

Claims (5)

Magnets,
A pot type yoke including a bottom portion on which the magnet is placed, a cylindrical portion extending from the outer periphery of the bottom portion to the vicinity of the upper surface position of the magnet, and a flange portion extending outward from the upper end portion of the cylindrical portion. When,
A magnetic circuit having a plate mounted on the magnet;
A frame attached to the flange portion,
A convex portion is formed on the upper surface of the flange portion, and an opening is formed in the frame at a position corresponding to the convex portion,
The speaker device, wherein the convex portion is inserted into the opening, and the magnetic circuit is attached to the frame in a state where the convex portion is deformed.   The speaker device according to claim 1, wherein the frame is sandwiched between the convex portion in a state in which an upper end portion is deformed and an upper surface of the flange portion.   The speaker device according to claim 1, wherein the frame and the flange portion are in close contact with each other.   The speaker device according to any one of claims 1 to 3, wherein an opening for positioning a caulking blade of the caulking device and a caulking portion of the convex portion is formed in the bottom portion. Forming a pot type yoke having a flange portion and a convex portion formed on the upper surface of the flange portion;
And a step of attaching the frame to the flange portion by deforming the convex portion with a caulking device in a state where the frame is placed on the upper surface of the flange portion.

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