JP2005159982A - Speaker apparatus and manufacturing method thereof - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a speaker apparatus capable of enhancing a heat dissipation efficiency of a magnetic circuit. <P>SOLUTION: The speaker apparatus is provided with the magnetic circuit including a pot type yoke with a bottom, a flat magnet plate with an opening formed thereon, and a flat plate. The magnet and the plate are integrated by an adhesive element while the center axes of the magnet and the plate are respectively aligned to each other. The integrated magnet and plate are fixed to the pot type yoke by an adhesive element. When the speaker apparatus is driven, a voice coil generates heat, which is delivered to the magnet and the plate. Since the plate is located at a position closer to the voice coil than the position of the magnet, the temperature of the plate is highest. However, the opening is formed on the magnet in the speaker apparatus, the heat delivered to the plate is dissipated externally through the opening. Thus, the heat dissipation efficiency or the like of the magnetic circuit can be enhanced. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a structure of a magnet and a plate in a speaker device.

  2. Description of the Related Art Conventionally, there is known a speaker device including a magnetic circuit including a pot type yoke having an opening at the center, a flat magnet having no opening, and a flat plate. In such a speaker device, a flat-plate magnet is disposed on the pot type yoke, and a plate is disposed on the magnet so as to constitute an inner magnet type magnetic circuit.

  As a speaker device having this type of magnetic circuit, for example, a speaker realizing a high magnetic efficiency of the magnetic circuit is known (see, for example, Patent Document 1). In this speaker, a flat magnet is disposed on a yoke having an opening, and a flat top plate is disposed on the magnet to constitute a magnetic circuit.

  However, when the speaker is driven, the voice coil generates heat, and the heat is transmitted to a magnetic circuit such as a plate or a magnet. Generally, since the plate is disposed at a position closer to the voice coil than the magnet, the temperature is highest in the magnetic circuit. However, the above speaker has a problem that heat transferred from the voice coil to the plate cannot be efficiently radiated.

  In such a speaker manufacturing process, the magnetic circuit is manufactured by fixing the yoke and the magnet with an adhesive, and further fixing the magnet and the plate with an adhesive. However, once the components of the magnetic circuit have been assembled, it has not been possible to confirm the applied state or dry state of the adhesive later. Therefore, a magnetic circuit having an inappropriate adhesion state may be attached to the speaker, resulting in a problem that the quality of the speaker is deteriorated.

JP 2003-209898 A

  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 heat dissipation efficiency of a magnetic circuit and a manufacturing method thereof.

  The invention according to claim 1 is a speaker device comprising a magnet, a pot type yoke having a bottom portion on which the magnet is placed, and a plate placed on the magnet. And an opening is formed in the magnet and the bottom, and the openings are in communication with each other.

  The invention according to claim 3 is a speaker device, comprising a magnet, a pot type yoke having a bottom portion on which the magnet is placed, and a magnetic circuit having a plate placed on the magnet. And an opening is formed in the plate.

  The invention according to claim 7 is a method of manufacturing a speaker device, wherein the magnet and the plate are bonded via an adhesive element in a state in which the central axes of the flat magnet and the flat plate are aligned. The step of attaching, the step of checking the adherability of the magnet and the plate through the opening formed in the magnet, and the opening formed in the magnet and the opening formed in the pot type yoke. In this state, the magnet and the pot type yoke are bonded through a step of attaching the lower surface of the magnet and the upper surface of the pot type yoke via an adhesive element, and an opening formed in the pot type yoke. And a step of inspecting the suitability of the method.

  The invention according to claim 8 is a method of manufacturing a speaker device, in which the magnet and the plate are bonded via an adhesive element in a state in which the central axes of the flat magnet and the flat plate are aligned. A lower surface of the magnet in a state in which the center axis of the magnet and the pot type yoke is made to coincide with each other, the step of inspecting the adequacy of the adhesion state of the magnet and the plate through the opening formed in the plate Attaching the upper surface of the pot type yoke with an adhesive element, and inspecting the adherability of the magnet and the pot type yoke through an opening formed in the pot type yoke. It is characterized by having.

  In one embodiment of the present invention, a speaker device includes a magnet, a magnetic circuit having a pot type yoke having a bottom portion on which the magnet is placed, and a plate placed on the magnet. Openings are formed in the magnet and the bottom, and the openings are in communication with each other.

  In the above speaker device, the magnet and the plate are integrated via an adhesive element. Furthermore, the integrated magnet and plate are fixed to the pot type yoke via an adhesive element. Thus, in this speaker device, a magnetic circuit is constituted by the magnet, the plate, the pot type yoke and the like. When this speaker device is driven, the voice coil generates heat, which is transmitted to the magnet and the plate. At this time, since the plate is disposed at a position closest to the voice coil, the temperature is highest in the magnetic circuit.

  However, in this magnetic circuit, openings are formed in the magnet and the pot type yoke, and these openings communicate with each other, so that the heat transmitted to the plate is radiated to the outside through the openings. The As a result, the heat dissipation efficiency of the magnetic circuit can be improved.

  Further, by forming an opening in the magnet, it is possible to reduce the weight of the magnetic circuit and hence the speaker device. Since the opening is formed at the center of the magnet, there is almost no decrease in the magnetic flux density in the magnetic circuit.

  In addition, since the opening is formed in the magnet, when assembling the magnet and the plate of the speaker device, it is easy to visually check the application state of the adhesive element between the magnet and the plate and the dry state of the adhesive element through the opening. Can be confirmed. Therefore, when the adhesion state is poor, the magnet and the plate are separated and reassembled in an appropriate state to improve the quality of the magnetic circuit and consequently the quality of the speaker device. Can do. Also, if an opening is formed at the bottom of the pot type yoke, when the magnet and the pot type yoke are fixed via an adhesive element, the adhesion state between the lower surface of the magnet and the upper surface of the pot type yoke is visually observed through the opening. Can be easily confirmed. As a result, the quality of the magnetic circuit can be improved as described above.

  The opening formed in the pot type yoke can be used as a positioning hole when the pot type yoke is attached to the frame. Moreover, it uses as a process of attaching the various components of process S5 of FIG. 7, and process S15 of FIG. FIG. 16 shows a jig G used in this process. After attaching the frame 8 to the main body 52 of the yoke 5, when attaching various components such as a damper, a diaphragm, a cap, and a resin packing (not shown), a center erected at the center of the disk G1 of the jig G The positioning is performed by inserting the positioning pin G2 into the opening 51ab formed in the mounting portion 51a of the yoke 5. The disk G1 and the pin G2 rotate to rotate the yoke 5, the frame 8, and the like, apply an adhesive, and bond various components such as edges. Therefore, by using the opening, the pot type yoke can be attached to the frame with high accuracy, and the workability of the attaching work can be improved.

  In one aspect of the above speaker device, the opening of the magnet is larger than the opening formed in the bottom. Therefore, it is possible to improve the heat dissipation efficiency of the magnetic circuit when driving the speaker device.

  In another embodiment of the present invention, a speaker device includes a magnet, a crucible yoke having a bottom portion on which the magnet is placed, and a magnetic circuit having a plate placed on the magnet, An opening is formed in the plate.

  In the above speaker device, since the opening is formed in the plate, the heat transmitted from the voice coil to the magnet when the speaker device is driven can be efficiently radiated through the opening.

  In one aspect of the speaker device, an opening is formed in the magnet, and the opening of the magnet communicates with the opening of the plate. In another aspect of the speaker device, an opening is formed in the pot type yoke, and the opening of the pot type yoke communicates with the plate and the opening of the magnet. According to these aspects, the heat dissipation efficiency of the magnetic circuit can be further improved.

  In the other one aspect | mode of said speaker apparatus, the thickness of the center axis vicinity containing the said opening is thinner than the thickness of an outer peripheral part. That is, the plate is hollowed out at the center so that the magnetic flux density of the magnetic circuit is not affected. Therefore, the weight of the magnetic circuit can be reduced.

  In another embodiment of the present invention, a method for manufacturing a speaker device includes attaching a magnet and the plate via an adhesive element in a state where a central axis of a flat magnet and a flat plate are aligned. The process, the step of inspecting the adequacy of the adhesion state of the magnet and the plate through the opening formed in the magnet, and the opening formed in the magnet and the opening formed in the pot type yoke are communicated with each other. In this state, the adhering state of the magnet and the pot type yoke is determined by attaching the lower surface of the magnet and the upper surface of the pot type yoke through an adhesive element, and through the opening formed in the pot type yoke. And inspecting.

  According to the above method for manufacturing a speaker device, after adhering a magnet and a plate through an adhesive element, the appropriateness of the application state of the adhesive element and the dry state of the adhesive element is visually checked through an opening formed in the magnet. Can be easily confirmed. Therefore, when the adhesion state is inappropriate, the magnet and the plate are separated, and the magnet and the plate are reassembled in an appropriate state, thereby improving the quality of the magnetic circuit and consequently the quality of the speaker device. Can be improved.

  In addition, since the opening formed in the magnet and the opening formed in the pot type yoke are in communication with each other, the lower surface of the magnet and the upper surface of the pot type yoke are attached via an adhesive element. The suitability of the adhesion state between the magnet and the pot type yoke can be easily confirmed visually through the opening formed in the pot type yoke. Thereby, the quality of a magnetic circuit etc. can be improved like the above-mentioned.

  In another embodiment of the present invention, a method for manufacturing a speaker device includes attaching a magnet and the plate via an adhesive element in a state where a central axis of a flat magnet and a flat plate are aligned. A step of inspecting the adequacy of the adhesion state of the magnet and the plate through an opening formed in the plate, and a state where the center axis of the magnet and the pot type yoke is aligned, A step of adhering the upper surface of the pot type yoke through an adhesive element, and a step of inspecting the adherability of the magnet and the pot type yoke through an opening formed in the pot type yoke.

  According to the above method for manufacturing a speaker device, after the magnet and the plate are bonded via the adhesive element, the adhesive state between the magnet and the plate is applied and the adhesive element is dried through the opening formed in the plate. Can be easily confirmed visually. Therefore, when the adhesion state is inappropriate, the magnet and the plate are separated, and the magnet and the plate are reassembled in an appropriate state, thereby improving the quality of the magnetic circuit and consequently the quality of the speaker device. Can be improved.

  The opening formed in the plate can be used as a positioning hole when the pot type yoke is attached to the frame. Therefore, by using the opening, the pot type yoke can be attached to the frame with high accuracy, and the workability of the attaching work can be improved.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. The present invention aims to improve the heat dissipation efficiency of a magnetic circuit by providing an opening in a magnet and / or plate.

[First embodiment]
In the speaker device according to the first embodiment of the present invention, an opening is provided in the magnet to improve the heat dissipation efficiency of the plate having the highest temperature in the magnetic circuit system.

  1 and 2 schematically show a schematic configuration of a speaker device 100 according to a first embodiment of the present invention. The speaker device 100 of the first embodiment can be suitably used as a vehicle-mounted speaker. FIG. 1A shows a plan view of the speaker device 100. FIG. 1B shows a cross-sectional view along the cutting line A-A ′ of the speaker device 1 in FIG. 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 flat plate 7 and the outer peripheral wall of the flat magnet 6 having a size slightly smaller than that of the flat plate 7 with a certain distance therebetween. doing. 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 a flat magnet 6, a flat plate 7 disposed so as to overlap the upper portion of the magnet 6, and a pot type yoke 5 that accommodates them. An opening 6 a is formed at the center of the magnet 6. 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 detailed configuration of the magnetic circuit system 11 including the magnet 6 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 magnetic circuit system 11 including magnets]
Next, the configuration of the magnetic circuit system 11 including the magnet 6 capable of improving the heat dissipation efficiency of the plate 7 will be described in detail with reference to FIGS. 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). Yes. Thereby, the magnet 6 and the plate 7 which are the components of the magnetic circuit system 11 are held in a stable state.

  First, before describing the configuration of the magnet 6 that characterizes the present invention, the configuration of the pot type yoke 5 that is a component of the magnetic circuit system 11 will be described in detail.

  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 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, as described above, in the step of attaching various components in step S5 of FIG. 7 and step S15 of FIG. 13, it is used as a positioning opening as shown in FIG. Therefore, by using the opening 51ab, the pot type yoke 5 can be attached to the frame 8 with high accuracy, and the workability of the attaching work can be improved. In addition, in the manufacturing process of the magnetic circuit system 11, the opening 51ab is formed after the magnet 6 is attached to the pot type yoke 5 via the adhesive element, and then the application state of the adhesive element (for example, the adhesive element is surely attached to the necessary portion). Is used as a hole for visually confirming the dry state of the adhesive element. Therefore, when the adhesion state is poor, the magnet 6 and the pot type yoke 5 are separated and reassembled in an appropriate state, thereby improving the quality of the magnetic circuit and consequently the quality of the speaker device. Improvements can be made.

  Moreover, in this example, the weight of the pot type yoke 5 is reduced by forming the opening 51ab in the mounting portion 51a. Since the opening 51ab is formed at the center of the magnet 6, the magnetic flux density of the magnetic circuit system 11 hardly decreases.

  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 which is a component of the vibration system 10 includes a flat region 8a (in a broken line region) in which flatness is ensured and a plurality of openings formed in the flat region 8a. 8b.

  As shown in FIG. 4, the pot type yoke 5 having such a configuration has the convex portion 52 c 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, the speaker device 100 of the present invention has a very strong coupling between the pot type yoke 5 and the frame 8 and holds the heavy magnetic circuit system 11 in a stable state.

  As described above, in the speaker device 100 having the magnetic circuit system 11 including the magnet 6, the magnet 6 and the plate 7 are bonded and integrated by an adhesive element such as an adhesive. Further, the integrated magnet 6 and plate 7 are fixed to the pot type yoke 5 with an adhesive element. In this way, in the speaker device 100, the magnet 6, the plate 7, the pot type yoke 5, and the like constitute an internal magnet type magnetic circuit system 11.

  When the speaker device 100 is driven, the voice coil 4 generates heat, and the heat is transmitted to the magnet 6 and the plate 7. At this time, since the plate 7 is disposed at a position closest to the voice coil 4, the temperature is highest in the magnetic circuit system 11. However, in this magnetic circuit system 11, openings 6a and 51ab are respectively formed in the magnet 6 and the pot type yoke 5, and these openings 6a and 51ab are in communication, that is, the positions of the openings coincide. Therefore, the heat transmitted to the plate 7 is radiated to the outside through the openings 6a and 51ab (see arrow 66). Thereby, the heat dissipation efficiency of the magnetic circuit system 11 can be improved.

  Further, by forming the opening 6 a in the magnet 6, it is possible to reduce the weight of the magnetic circuit system 11, and hence the speaker device 100. Since the opening 6a is formed at the center of the magnet 6, the magnetic flux density of the magnetic circuit system 11 hardly decreases.

  Further, since the opening 6a is formed in the magnet 6, when the magnet 6 and the plate 7 of the speaker device 100 are assembled, the application state and adhesion of the adhesive element between the magnet 6 and the plate 7 are passed through the opening 6a. The suitability of the dry state of the element can be easily confirmed visually. Therefore, when the adhesion state is poor, the magnet 6 and the plate 7 are separated and reassembled in an appropriate state, thereby improving the quality of the magnetic circuit system 11 and consequently the quality of the speaker device 100. Can be improved.

[Method of Manufacturing Speaker Device 100]
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. FIG. 11A shows a plan view of a mounting jig 500 used when the magnet 6 and the plate 7 are integrated. FIG. 11B shows a state before the magnet 6 and the plate 7 are integrated using the mounting jig 500 as a side view. FIG. 11C shows a state after the magnet 6 and the plate 7 are integrated using the mounting jig 500 as a side view.

  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 integrated (step S3). Such a method will be described with reference to FIG. As shown in FIG. 11A, the mounting jig 500 has an opening 501, a first pedestal 502 on which the magnet 6 is placed, and a second pedestal 504 on which the plate 7 is placed. The opening 501 is used for positioning by inserting a protrusion R1 standing at the center of the disc-shaped turntable R shown in FIGS. 11B and 11C into the opening 501. Further, when the magnet 6 and the plate 7 are attached via an adhesive element such as an adhesive, the holes are used for visually confirming the application state of the adhesive element and the dry state of the adhesive element. However, the adhesion state between the magnet 6 and the plate 7 can also be confirmed visually through the opening 6 a of the magnet 6 without using the opening 501. The adhesive is applied while rotating the turntable R and rotating the magnet 6.

  As shown in FIG. 11B, first, the magnet 6 is placed on the first pedestal 502 so that the upright wall 503 of the mounting jig 500 and a part of the side wall of the magnet 6 are in close contact with each other. Thereby, the central axis of the opening 501 of the mounting jig 500 and the central axis of the magnet 6 coincide with each other. Next, an adhesive element (not shown) is applied on the magnet 6. Next, the plate 7 is placed on the second pedestal 504 so that the upright wall 505 of the mounting jig 500 and a part of the side wall of the plate 7 are in close contact with each other. As a result, as shown in FIG. 11C, the upper surface of the magnet 6 and the lower surface of the plate 7 are pasted in a state where the central axis of the opening 501, the central axis of the magnet 6, and the central axis of the plate 7 coincide with each other. Worn. Next, the magnet 6 and the plate 7 integrated from the mounting jig 500 are taken out.

  Next, whether or not the application state of the adhesive element between the magnet 6 and the plate 7 is appropriate is visually confirmed through the opening 6 a of the magnet 6. At this time, if the application state of the adhesive element is poor, the magnet 6 and the plate 7 are separated, and the plate 7 and the magnet 6 are pasted again by the method described above. When the application state of the adhesive element is appropriate or appropriate, the dry state of the magnet 6 and the plate 7 is visually confirmed through the opening 6a of the magnet 6 after a predetermined time has elapsed. Then, the adhesive element is completely dried, and the magnet 6 and the plate 7 are integrated to complete this process.

  Next, returning to FIG. 7, the magnet 6 and the plate 7 integrated in the pot type yoke 5 are accommodated (step S4). Specifically, the integrated magnet 6 and plate 7 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. The lower surface and the upper surface of the placement portion 51a are fixed by 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. And the application | coating state of the adhesive element of the lower surface of the plate 7 and the upper surface of the mounting part 51a is confirmed visually through opening 51ab of the pot type yoke 5. FIG. At this time, when the application state of the adhesive element is poor, the integrated magnet 6 and plate 7 are separated from the pot type yoke 5 again, and the adhesive element is applied again to the mounting portion 51a. Then, the integrated magnet 6 and plate 7 are again fixed to the upper surface of the mounting portion 51a of the pot type yoke 5 via an adhesive element. If the application state of the adhesive element is appropriate or appropriate, after a predetermined time has elapsed, the plate 7 and the mounting portion 51a of the pot type yoke 5 are placed through the opening 51ab of the pot type yoke 5. And visually confirm the dry state of the adhesive element. Then, the adhesive element is completely dried, and the integrated magnet 6 and plate 7 and the mounting portion 51a of the pot type yoke 5 are completely fixed, thereby completing this process.

  Next, various other components of the speaker device 100 are attached to the frame 8 or the like (step S5). Thus, the speaker device 100 shown in FIGS. 1 and 2 is manufactured.

[Second Embodiment]
In the speaker device according to the second embodiment of the present invention, an opening is provided in the plate so as to improve the heat dissipation efficiency of the magnet which is a component of the magnetic circuit system.

  FIG. 12A schematically shows a cross-sectional view of the speaker device 600 according to the second embodiment of the present invention. The speaker device 600 of the second embodiment can be suitably used as a vehicle-mounted speaker, like the speaker device 100 of the first embodiment. FIG. 12B shows an enlarged cross-sectional view of the region E2 in FIG. In the following, with reference to FIGS. 12A and 12B, the specific configuration and effects of the speaker device 600 of this embodiment will be mainly described. In the following, the same components as those of the speaker device 100 of the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.

  When the speaker device 100 of the first embodiment and the speaker device 600 of the second embodiment are compared, the following points are different. That is, the former has an opening 6 a formed at the center of the magnet 6, but the latter has no opening formed in the magnet 26. In the former, no opening is formed in the plate 7, but in the latter, an opening 27 a is formed in the center of the plate 27.

  Therefore, the speaker device 600 of the second embodiment has the following effects. That is, when the speaker device 600 is driven, heat is generated in the voice coil 4, and the heat is transmitted to the magnet 26 and the plate 27. The heat transmitted to the magnet 26 is radiated to the outside through the opening 27a of the plate 27 and the opening 51ab of the pot type yoke 5 (see arrow 67). Thereby, the improvement of the heat dissipation efficiency of the magnet 26 which is a component of the magnetic circuit system can be achieved. In the present speaker device 600, no opening is formed in the magnet 26, but an opening may be formed in the magnet 26. As a result, the opening 51ab of the pot type yoke 5, the opening of the magnet 26, and the opening 27a of the plate 27 communicate with each other, and the heat radiation efficiency of the magnetic circuit system can be improved.

  Moreover, the following effects are produced when the plate 27 and the magnet 26 are assembled. That is, the plate 27 and the magnet 26 are attached via an adhesive element. At this time, since the opening 27a is formed in the plate 27, the application state of the adhesive element between the magnet 26 and the plate 27 and the dry state of the adhesive element can be easily confirmed visually through the opening 27a. Therefore, when the adhesion state is inappropriate, the magnet 26 and the plate 27 can be separated, and the magnet 26 and the plate 27 can be reassembled in an appropriate state. As a result, the quality of the magnetic circuit system can be improved, and hence the quality of the speaker device 600 can be improved.

  Furthermore, since the opening 27a is formed in the plate 27, the following effects are also produced. That is, when attaching the pot type yoke 5 to the frame 8, by inserting the positioning projection 402 of the crimping jig 400 into the opening 27 a of the plate 27, the crimping portion of the convex part 52 c of the pot type yoke 5 can be accurately determined. Can be positioned. As a result, the pot type yoke 5 can be crimped to the frame 8 with high accuracy, and the workability of the mounting work can be improved.

[Method for Manufacturing Speaker Device 600]
Next, a method for manufacturing the speaker device 600 will be described with reference to FIGS. In the following, the steps common to the method for manufacturing the speaker device 100 of the first embodiment will be described in a simplified manner. FIG. 13 shows a flowchart of a method for manufacturing the speaker device 600. FIG. 14 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 by the same method as in the first embodiment (step S11). Next, the magnet 26 and the plate 27 are integrated (step S12). Specifically, the magnet 26 and the plate 27 are bonded via an adhesive element using the mounting jig 500 described above. As a result, the magnet 26 and the plate 27 are integrated in a state where the central axis of the magnet 26 and the central axis of the plate 27 coincide.

  Next, the integrated magnet 26 and plate 27 are accommodated in the pot type yoke 5 by the same method as in the first embodiment (step S13). Next, the pot type yoke 5 is attached to the frame 8 (step S14). Specifically, first, as shown in FIG. 14A, 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. 14A, while the caulking jig 450 is lowered from the upper position, the positioning protrusion 452 is inserted into the opening 27a of the plate 27, and the upper surface of the convex portion 52c is formed. Accurate positioning of the caulking part. As a result, the caulking portion on the upper surface of the convex portion 52c and the caulking blade 451 having a conical tip are brought into contact with each other.

  Next, as shown in FIG. 14B, the convex portion 52 c is crimped to the frame 8 by the crimping blade 451 while the crimping jig 450 is further lowered from the position. Next, as shown in FIG. 14C, the caulking jig 450 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, various other components of the speaker device 600 are attached to the frame 8 or the like (step S15). Thus, the speaker device 600 shown in FIG.

[Modification]
In the speaker device 600 described above, only the opening 27 a is formed at the center of the plate 27. In addition, in order to further reduce the weight of the magnetic circuit system, the excess thickness of the plate 27 may be cut out so as not to reduce the magnetic flux density of the magnetic circuit system. FIG. 15A shows a plan view of the plate 277 in a state where the surplus meat is cut out. FIG. 15B shows a cross-sectional view along the cutting line DD ′ of the plate 277 shown in FIG.

  As shown in FIGS. 15A and 15B, the plate 277 has an opening 277a at the center thereof. Further, as shown in a region E3 in FIG. 15B, the plate 277 has a shape in which the shape of the truncated cone is inverted when viewed in cross section. That is, the central portion of the plate 277 is cut out so that the thickness in the vicinity of the central axis of the plate 277 is thinner than the thickness on the outer peripheral side. By thinning the vicinity of the central axis of the flat plate 277 in this way, the plate 277 can be reduced in weight without reducing the magnetic flux density. Therefore, if the plate 277 is applied to the magnetic circuit system of the speaker device 600, the magnetic circuit system can be reduced in weight, and thus the speaker device 600 can be reduced in weight.

The top view and sectional drawing of the speaker apparatus which concern on 1st Example of this invention are shown. The rear view and side view of the speaker apparatus which concern on 1st 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 1st Example 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. The top view etc. of the jig for attachment which integrates a magnet and a plate are shown. The top view etc. of the speaker apparatus based on 2nd Example of this invention are shown. The flowchart of the manufacturing method of the speaker apparatus which concerns on 2nd Example is shown. Sectional drawing of the process of crimping the convex part of a pot type yoke to a flame | frame is shown typically. The top view and sectional drawing of a plate which have the form where the surplus meat was hollowed out are shown. Sectional drawing containing the jig | tool of the process of attaching various components to a magnetic circuit and a frame is shown typically.

Explanation of symbols

5 Acupoint type yoke 6, 26 Magnet 7, 27, 277 Plate 8 Frame 10 Vibration system 11 Magnetic circuit system 51 Bottom 52 Body 8a Flat region 8b Opening 52a Cylindrical 52b Flange 52c Convex 100, 600 Speaker device 200 Press Device 400, 450 Caulking jig 500 Mounting jig

Claims (8)

Magnets,
A pot type yoke having a bottom for placing the magnet;
A magnetic circuit having a plate placed on the magnet, and
An opening is formed in the magnet and the bottom, and each opening is in communication.   The speaker device according to claim 1, wherein the opening of the magnet is larger than the opening formed in the bottom. Magnets,
A pot type yoke having a bottom for placing the magnet;
A magnetic circuit having a plate placed on the magnet, and
The speaker device, wherein an opening is formed in the plate. The magnet has an opening,
The speaker device according to claim 3, wherein the opening of the magnet communicates with the opening of the plate. An opening is formed in the pot type yoke,
The speaker device according to claim 4, wherein the opening of the pot type yoke communicates with the opening of the plate and the magnet.   The speaker device according to any one of claims 3 to 5, wherein the plate has a thickness in the vicinity of the central axis including the opening that is thinner than a thickness of an outer peripheral portion. A step of adhering the magnet and the plate through an adhesive element in a state in which the central axes of the flat plate magnet and the flat plate are matched,
Inspecting the adequacy of the adhesion state of the magnet and the plate through the opening formed in the magnet;
Attaching the lower surface of the magnet and the upper surface of the pot type yoke via an adhesive element in a state where the opening formed in the magnet and the opening formed in the pot type yoke communicate with each other;
And a step of inspecting the adherability of the magnet and the pot type yoke through an opening formed in the pot type yoke. A step of adhering the magnet and the plate through an adhesive element in a state in which the central axes of the flat plate magnet and the flat plate are matched,
Inspecting the adequacy of the adhesion state of the magnet and the plate through the opening formed in the plate;
A step of attaching the lower surface of the magnet and the upper surface of the pot type yoke via an adhesive element in a state where the central axes of the magnet and the pot type yoke are matched,
And a step of inspecting the adherability of the magnet and the pot type yoke through an opening formed in the pot type yoke.

Images