JP2012044288A - Electrodynamic speaker, manufacturing jig therefor, and manufacturing method therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the number of necessary manufacturing jigs, simplify the manufacturing method, and reduce the manufacturing cost for an electrodynamic type speaker using a speaker diaphragm integrally formed with a dust cap that closes one end of a voice coil bobbin. A method of manufacturing an electrodynamic speaker that can be made is provided.
A manufacturing jig includes a base that contacts an outer surface of a bottom portion of a yoke, a plurality of extending from the base and engaging with a through hole of the yoke, and a front end side of the manufacturing jig passing through the through hole and the magnetic gap. A plurality of convex portions, a first engaging portion that engages with a through hole of the yoke, a second engaging portion that engages with a side surface portion of the magnet, and a side surface of the plate A third engagement portion that engages with the first engagement portion, a fourth engagement portion that engages with the inner surface of the bobbin of the voice coil, and a fifth engagement portion that engages with one end of the bobbin. The third engaging portion and the fourth engaging portion are formed integrally with the front and back sides, and the fifth engaging portion is formed between the second engaging portion and the third engaging portion.
[Selection] Figure 4

Description

  The present invention relates to an electrodynamic speaker using a speaker diaphragm integrally formed with a dust cap that closes one end of a voice coil bobbin, a manufacturing jig thereof, and a manufacturing method thereof.

  In an electrodynamic speaker, an assembly structure is often used in which an inner peripheral end of a speaker diaphragm (particularly, a cone diaphragm) is bonded to a cylindrical side surface of a cylindrical voice coil bobbin with an adhesive. In the process of manufacturing the electrodynamic speaker, the position of the magnetic circuit of the voice coil in the magnetic gap is determined by a voice coil holder inserted on the inner diameter side of the voice coil bobbin. Therefore, when a dust cap that closes one end of the voice coil bobbin is employed, the voice coil holder can be removed after the speaker diaphragm is bonded to the voice coil bobbin in the step of manufacturing the electrodynamic speaker. On the other hand, in an electrodynamic speaker using a speaker diaphragm in which a dust cap is integrally formed, the manufacturing process as described above cannot be performed, so various devices for accurately positioning the voice coil have been made. .

  Conventionally, there is a method for manufacturing a speaker for positioning a voice coil with high accuracy by the applicant of the present invention (Patent Document 1). Specifically, this speaker manufacturing method is a speaker manufacturing method for assembling a speaker using a voice coil positioning jig, and the voice coil positioning jig defines the position of the voice coil within the magnetic gap. And a support part to which the film part is attached. The voice coil positioning jig is arranged so that the tip of the film part is disposed in the magnetic gap and the support part is disposed in the through hole defined in the magnetic circuit. After the first step of arranging the tool from the front side of the magnetic circuit, the second step of arranging the voice coil in the magnetic gap so as to be arranged outside the film portion, and after the vibration system is attached The third step of taking out the film part from the magnetic gap by pushing the support part into the front side of the magnetic circuit, and the support part magnetically through the through hole By being pulled to the rear side of the road, and a fourth step of the film unit is taken out the magnetic circuit back side through the through hole.

  Conventionally, a hole is provided in the lower part of the yoke that constitutes the magnetic circuit, and a jig for holding the voice coil at the center of the magnetic gap is inserted through the hole, and the voice coil is positioned along the jig. There is a method of assembling a speaker (Patent Document 2). Conventionally, in a full drive speaker in which a diaphragm holding a voice coil is assembled to a frame equipped with a magnetic circuit through an edge and a damper so as to freely vibrate, it is located outside the voice coil mounting portion of the diaphragm. There is a full-surface driving type speaker in which a damper and an edge are overlapped (Patent Document 3). The assembly jig 7 disclosed in FIG. 3 used in the assembly procedure is composed of a base plate 71 and positioning posts 72 protruding in a desired number at predetermined locations on the base plate 71.

  In addition, a magnetic circuit is provided in the center part, a diaphragm mounting seat is provided in the peripheral part, and a peripheral part of the diaphragm is provided on the front surface of the frame provided with a terminal on the side surface of the intermediate part with the voice coil facing the magnetic gap. In the method of manufacturing a small speaker that is fixed to the mounting seat and the other end of the lead wire having one end connected to the voice coil is inserted and fixed to the terminal through the diaphragm and the frame, the back side is located between the terminal and the magnetic circuit. Using a frame with a removable shaping tool exhausted from the front to the front side, lock the lead wire to which the other end is fixed to the terminal with the shaping tool on the way, and after shaping the lead wire, remove the shaping tool There is a manufacturing method of a small speaker characterized in that (Patent Document 4).

Japanese Patent No. 3879755 (FIGS. 1A to 4B) JP-A-55-141896 (FIGS. 1 to 3) JP 61-193599 A (FIGS. 1 to 8) JP-A-61-167300 (FIGS. 1 to 5)

  However, in the method for manufacturing a speaker having a structure described in Patent Documents 1 to 3, the voice coil is only positioned with high accuracy, and the manufacturing of the magnetic circuit cannot be simplified. In a conventional speaker manufacturing method, a magnetic gap of a magnetic circuit must be formed with a predetermined size using a gap gauge or the like separately. In addition, when the connecting wire (or the tinsel wire) that connects the voice coil and the terminal (terminal board) must be shaped into a predetermined shape, a dedicated jig such as a shaping rod must be prepared separately. There is a problem of not becoming. In the case of a small electrodynamic speaker, it may be difficult to insert a shaping rod for shaping the tinsel wire into a predetermined shape.

  The present invention has been made to solve the above-described problems of the prior art, and an object of the present invention is to provide an electrodynamic motor using a speaker diaphragm in which a dust cap that closes one end of a voice coil bobbin is integrally formed. An object of the present invention is to provide a method for manufacturing an electrodynamic speaker that can reduce the number of necessary manufacturing jigs, simplify the manufacturing method, and reduce the manufacturing cost.

  The electrodynamic speaker of the present invention includes a yoke having a plurality of through holes in the bottom, a magnet connected to the inner surface of the bottom of the yoke, and a magnetic gap connected to the magnet and communicating with the through hole between the magnets. A magnetic circuit having a defining plate, and a voice coil having a coil disposed in the magnetic gap.

  The electrodynamic speaker of the present invention further includes a frame coupled to the magnetic circuit, a terminal attached to the frame, and a connection line connected to the terminal and the coil of the voice coil, and the frame is coupled to the magnetic circuit. A magnetic circuit fixing portion, a terminal mounting portion to which a terminal is attached, and a shaping jig insertion hole that is provided in the vicinity of the terminal mounting portion and penetrates the magnetic circuit fixing portion.

  An electrodynamic speaker manufacturing jig of the present invention is an electrodynamic speaker manufacturing jig used for manufacturing the above electrodynamic speaker, and the manufacturing jig is an outer surface of the bottom of the yoke. And a plurality of convex portions extending from the base and engaging with the through hole of the yoke and having a tip end side passing through the through hole and the magnetic gap. Each of which engages with the through hole of the yoke, a second engagement portion that engages with the side surface portion of the magnet, a third engagement portion that engages with the side surface portion of the plate, and a voice The coil includes a fourth engagement portion that engages with the inner surface of the bobbin of the coil, and a fifth engagement portion that engages with one end of the bobbin, and the third engagement portion and the fourth engagement portion are integrated with each other. And a fifth engagement portion is formed between the second engagement portion and the third engagement portion.

  An electrodynamic speaker manufacturing jig of the present invention is the above electrodynamic speaker manufacturing jig used for manufacturing the above electrodynamic speaker, wherein the manufacturing jig extends from the base. And a plurality of shaping rod portions that engage with the molding jig insertion hole of the frame and whose tip side shapes the connection line, and each of the plurality of shaping rod portions is a frame shaping jig. It further has a sixth engagement portion that engages with the insertion hole, and a seventh engagement portion that protrudes from the shaping jig insertion hole and contacts the connection line.

  Moreover, the manufacturing method of the electrodynamic speaker of the present invention is a manufacturing method for manufacturing the above electrodynamic speaker, the step of forming a magnetic circuit using the above electrodynamic speaker manufacturing jig, A step of disposing the coil of the voice coil in the magnetic gap of the magnetic circuit, and a step of removing the plurality of convex portions of the manufacturing jig from the magnetic circuit.

  The manufacturing method of the electrodynamic speaker of the present invention is the above manufacturing method of manufacturing the above electrodynamic speaker, the step of connecting a frame to a magnetic circuit, and the manufacturing process of the above electrodynamic speaker. A step of shaping the connecting line into a predetermined position and shape using a tool, and removing the plurality of convex portions of the above-mentioned electrodynamic speaker manufacturing jig from the through hole of the magnetic circuit, and a plurality of shaping rod portions Removing from the forming jig insertion hole of the frame.

  The operation of the present invention will be described below.

  The electrodynamic speaker of the present invention includes a yoke having a plurality of through holes in the bottom, a magnet connected to the inner surface of the bottom of the yoke, and a magnetic gap connected to the magnet and communicating with the through hole between the magnets. A magnetic circuit having a defining plate, and a voice coil having a coil disposed in the magnetic gap. The electrodynamic speaker manufacturing jig of the present invention includes a base that contacts the outer surface of the bottom of the yoke, and extends from the base to engage with the through-hole of the yoke. A plurality of convex portions passing through the magnetic gap. Therefore, in the method for manufacturing an electrodynamic speaker of the present invention, even if the electrodynamic speaker uses a speaker diaphragm in which a dust cap is integrally formed, a manufacturing jig is inserted into the through hole from the back side of the magnetic circuit. By inserting the convex portion, the voice coil can be accurately positioned.

  In this manufacturing jig, each of the plurality of convex portions is provided on the first engaging portion that engages with the through hole of the yoke, the second engaging portion that engages with the side surface portion of the magnet, and the side surface portion of the plate. A third engagement portion that engages, a fourth engagement portion that engages with the inner surface of the bobbin of the voice coil, and a fifth engagement portion that engages with one end of the bobbin. The joining portion and the fourth engaging portion are formed integrally with the front and back sides, and the fifth engaging portion is formed between the second engaging portion and the third engaging portion. Accordingly, not only can the voice coil be accurately positioned by the third engagement portion, the fourth engagement portion, and the fifth engagement portion, but also the first engagement portion, the second engagement portion, and the third engagement portion. This makes it possible to position the magnet and the plate, and there is an advantage that it is not necessary to preprocess the magnetic circuit separately using a gap gauge or the like. It is only necessary to place the magnetic circuit components and the vibration system components in order on the manufacturing jig, and finally, the plurality of convex portions of the manufacturing jig may be removed from the magnetic circuit. Therefore, the manufacturing method becomes easy and the manufacturing cost can be reduced.

  Preferably, the electrodynamic speaker of the present invention further includes a frame connected to the magnetic circuit, a terminal attached to the frame, and a connection line connected to the terminal and the coil of the voice coil, and the frame is connected to the magnetic circuit. What is necessary is just to have the magnetic circuit fixing | fixed part to connect, the terminal attaching part which attaches a terminal, and the shaping jig insertion hole which adjoins the terminal attaching part and penetrates a magnetic circuit fixing | fixed part.

  In this case, the manufacturing jig for the electrodynamic speaker according to the present invention includes a plurality of shaping rods that extend from the base and engage with the molding jig insertion hole of the frame, and whose tip side shapes the connection line. And a part. Further, each of the plurality of shaping rod portions includes a sixth engagement portion that engages with the shaping jig insertion hole of the frame, and a seventh engagement portion that protrudes from the shaping jig insertion hole and contacts the connection line. Have. Therefore, in the method for manufacturing an electrodynamic speaker according to the present invention, even with a small electrodynamic speaker, the connecting rod can be shaped into a predetermined shape by inserting the shaping rod portion of the production jig into the frame. .

  Even an electrodynamic speaker using a speaker diaphragm with an integrated dust cap that closes one end of the voice coil bobbin reduces the number of manufacturing jigs required, simplifies the manufacturing method, and reduces manufacturing costs. An electrodynamic speaker that can be manufactured at low cost can be provided.

It is a figure explaining the electrodynamic speaker 1 by preferable embodiment of this invention. Example 1 It is a figure explaining the manufacturing jig | tool 20 by preferable embodiment of this invention. Example 1 It is a figure explaining the manufacturing process of the electrodynamic speaker 1 by preferable embodiment of this invention. Example 1 It is a figure explaining the manufacturing process of the electrodynamic speaker 1 by preferable embodiment of this invention. Example 1 It is a figure explaining the manufacturing process of the electrodynamic speaker 1 by preferable embodiment of this invention. Example 1

  Hereinafter, although the electrodynamic speaker by preferable embodiment of this invention is demonstrated, this invention is not limited to these embodiment.

  FIG. 1 is a diagram illustrating an electrodynamic speaker 1 according to a preferred embodiment of the present invention. Specifically, FIG. 1A is a perspective view of the electrodynamic speaker 1 viewed from the front side, and FIG. 1B is a speaker diaphragm 2 and an edge 3 constituting the electrodynamic speaker 1. It is a perspective view at the time of removing. FIG. 2 is a diagram for explaining a manufacturing jig 20 used in the process of manufacturing the electrodynamic speaker 1. Specifically, the first jig portion 21 a and the second jig portion of the manufacturing jig 20 are illustrated. 21b is an enlarged perspective view of each of FIGS. Further, FIGS. 3 to 5 are diagrams for explaining a manufacturing process of the electrodynamic speaker 1.

  In the following, the first jig portion 21a and the second jig portion 21b of the manufacturing jig 20 integrally formed by the base portion 22 are separately illustrated. The configuration of the base portion 22 is not limited as long as it connects the first jig portion 21a and the second jig portion 21b in a predetermined positional relationship, and is not illustrated. Further, as will be described later, a part of the structure of the electrodynamic speaker 1, an internal structure, and the like are omitted.

  The electrodynamic speaker 1 of this embodiment is an electrodynamic speaker having a substantially circular inverted dome-shaped speaker diaphragm 2 having a diameter of about 5 cm. The outer peripheral end of the speaker diaphragm 2 is supported by an edge 3, and the outer peripheral end of the edge 3 is fixed to the frame 6. Further, the bobbin of the voice coil 4 is connected to the central portion of the speaker diaphragm 2 from the back side, and is bonded with an adhesive. A circular coil wound around the bobbin 4 a of the voice coil 4 is disposed in an annular magnetic gap 14 of the magnetic circuit 10 fixed to the frame 6. The bobbin 4 a of the voice coil 4 is held at the center by the damper 5, the inner peripheral end of the damper 5 is connected to the bobbin of the voice coil 4, and the outer peripheral end of the damper 5 is fixed to the frame 6. A terminal 7 is attached to the side surface of the frame 6 and is connected to the coil 4 b of the voice coil 4 by a connection wire 8 such as a tinsel wire, so that an audio signal current is supplied to the voice coil 4.

  The speaker diaphragm 2 is a reverse dome-shaped diaphragm having a smooth concave recess when the electrodynamic speaker 1 is viewed from the front, and a connecting portion to which the bobbin 4a of the voice coil 4 is attached to the center rear surface side. Is stipulated. The speaker diaphragm 2 does not have a central hole for attaching a dust cap for inserting a voice coil holder which is a manufacturing jig. Since the speaker diaphragm 2 has a so-called dust cap integrally formed, the driving force generated by the coil can be transmitted more smoothly through the bobbin 4a of the voice coil 4, and transmission loss of the driving force can be prevented. The back side of the speaker diaphragm 2 is the side to which the bobbin 4a of the voice coil 4 of the speaker diaphragm 2 is bonded. Since the connecting portion is formed not on the front side but on the back side of the speaker diaphragm 2, the connecting portion is not exposed on the front side, so that the aesthetic appearance of the speaker diaphragm 2 is extremely excellent.

  The speaker diaphragm 2 and the edge 3 are connected to the voice coil 4 and the frame 6 of the electrodynamic speaker 1 shown in FIG. The In the manufacturing process of the electrodynamic speaker 1 having the speaker diaphragm 2 in which the conventional dust cap is integrally formed, the center of the voice coil 4 can be accurately held by the damper 5 even if the voice coil holder is removed. Must do so. In the manufacturing process of the electrodynamic speaker 1 of this embodiment, the voice coil holder can be removed after the speaker diaphragm 2 and the edge 3 are connected to the voice coil 4 and the frame 6 as described later.

  The voice coil 4 is formed of a bobbin 4a formed in a cylindrical shape, and a coil 4b wound around one end thereof and supplied with an audio current. The other end of the bobbin 4a around which the coil 4b is not wound is connected to the back side of the speaker diaphragm 2 with an adhesive. The coil 4b of the voice coil 4 is disposed in a circular magnetic gap 14 of the magnetic circuit 10 described later. In the electrodynamic speaker 1, when an audio current is supplied to the coil 4b of the voice coil 4, a driving force is applied to the voice coil 4 disposed in the magnetic gap 14, and the voice coil 4 moves in the front-rear direction (shown in FIG. 1). The connected speaker diaphragm 2 also vibrates in the front-rear direction. The speaker diaphragm 2 is flexibly supported by the compliance of the edge 3 and the damper 5.

  The magnetic circuit 10 of this embodiment includes a plate 13 that fits inside the bobbin 4 a of the voice coil 4, a magnet 12, and a yoke 11 that is fixed to the magnet 12 and defines a magnetic gap 14 between the plate 13. It is an inner magnet type magnetic circuit provided. The magnet 12 is connected to the inner surface of the bottom of the yoke 11, and a DC magnetic field is formed in the magnetic gap 14. The outer edge portion of the yoke 11 of the magnetic circuit 10 is engaged with the magnetic circuit fixing portion of the frame 6. The yoke 11 has a plurality of through holes 11a at the bottom, and the through holes 11a and the circular magnetic air gap 14 communicate with each other so that a convex part 23 of a manufacturing jig to be described later passes.

  The frame 6 of the present embodiment has a substantially basket-shaped base formed from a resin excellent in moldability, and includes an edge fixing portion provided on the front side of the base and a magnetic circuit fixing portion provided on the back side of the base. And a connecting part for connecting the edge fixing part and the magnetic circuit fixing part. In the magnetic circuit fixing portion of the frame 6, a circular hole is formed in which the outer edge portion of the yoke 11 of the magnetic circuit 10 is engaged. A terminal mounting portion to which the terminal 7 to which the connection line 8 is connected is formed at the connecting portion of the frame 6, and as shown in FIG. 5A, the terminal mounting portion is attached to the magnetic circuit fixing portion of the frame 6. A shaping jig insertion hole 6a is provided in the vicinity of the portion and penetrating therethrough.

  The manufacturing jig 20 is a manufacturing jig used for manufacturing the electrodynamic speaker 1 integrally including a first jig portion 21a and a second jig portion 21b illustrated in a base portion 22 formed of a resin such as POM. It is a tool. The first jig portion 21a of the manufacturing jig 20 has a base portion 22a that contacts the outer surface of the bottom portion of the yoke 11, and extends from the base portion 22a to engage with the through hole 11a of the yoke 11, and the tip side thereof is And four convex portions 23 that pass through the through-hole 11a and the magnetic gap 14. On the other hand, the second jig portion 21b of the manufacturing jig 20 extends from the base portion 22b and engages with the forming jig insertion hole 6a of the frame 6, and the tip side of the second jig portion 21b shapes the connecting wire 8. And a bar portion 24.

  The convex portion 23 of the first jig portion 21 a is a columnar portion including engaging portions that are stepwise with different thicknesses, and each convex portion 23 is formed in the through hole 11 a of the yoke 11. The first engaging portion 23a to be engaged, the second engaging portion 23b to be engaged with the side surface portion of the magnet 12, the third engaging portion 23c to be engaged with the side surface portion of the plate 13, and the bobbin of the voice coil 4 It has the 4th engaging part 23d engaged with the inner surface of 4a, and the 5th engaging part 23e engaged with the one end side of the bobbin 4a. In the convex portion 23, the third engagement portion 23c and the fourth engagement portion 23d are integrally formed on the front and back sides, and the fifth engagement portion 25e includes the second engagement portion 23b, the third engagement portion 23c, and the like. Formed between.

  The pair of shaping rod portions 24 of the second jig portion 21b protrudes from the shaping jig insertion hole 6a and contacts the connection line 8 with the sixth engagement portion 24a engaged with the shaping jig insertion hole 6a of the frame 6. And a seventh engaging portion 24b in contact therewith. Since the sixth engaging portion 24a is an elongated columnar portion, the other end opposite to the one end connected to the base 22b can be bent and deformed to some extent. The seventh engagement portion 24b includes a pair of protrusions that sandwich the connection line 8, and can shape the connection line 8 to an appropriate position as illustrated in FIG.

  With reference to FIG. 3, the process of forming the magnetic circuit 10 using the manufacturing jig 20 of the electrodynamic speaker 1 will be described. First, the yoke 11 is placed on the base portion 22a of the first jig portion 21a of the manufacturing jig 20 so that the convex portion 23 extending from the base portion 22a engages with the through hole 11a. Subsequently, the magnet 12 coated with an adhesive and the plate 13 are continuously placed. Since the convex portion 23 of the first jig portion 21 a has a second engagement portion 23 b that engages with the side surface portion of the magnet 12 and a third engagement portion 23 c that engages with the side surface portion of the plate 13. The positioning of the magnet 12 and the plate 13 with respect to the yoke 11 can be performed. When the adhesive is cured, a predetermined magnetic gap 14 is formed, so that it is not necessary to preprocess the magnetic circuit 10 using a gap gauge or the like separately.

  Next, with reference to FIG. 4, a process of arranging the coil 4 b of the voice coil 4 in the magnetic gap 14 of the magnetic circuit 10 and connecting the frame 6 to the magnetic circuit 10 will be described. With the magnetic circuit 10 placed on the base portion 22a of the first jig portion 21a of the manufacturing jig 20, the outer edge portion of the yoke 11 of the magnetic circuit 10 and the magnetic circuit fixing portion of the frame 6 are engaged. Combine and fix with adhesive. Further, the inner surface of the bobbin 4a of the voice coil 4 is engaged with the fourth engagement portion 23d of the convex portion 23 of the first jig portion 21a. At this time, as shown in FIG. 4B in which a part of the sectional view shown in FIG. 4A is enlarged, one end side below the bobbin 4a is connected to the second engaging portion 23b and the third engaging portion 23c. The coil 4b of the voice coil 4 can be accurately positioned at a predetermined position of the magnetic gap 14 of the magnetic circuit 10 because the fifth engagement portion 25e formed between the two is engaged. Therefore, when the inner peripheral end of the damper 5 is connected to the bobbin 4a of the voice coil 4 with an adhesive, and the outer peripheral end of the damper 5 is fixed to the frame 6 with an adhesive, the through hole 11a of the yoke 11 is formed from the back side of the magnetic circuit 10. The speaker diaphragm 2 and the edge 3 in which the dust cap is integrally formed can be bonded to the voice coil 4 and the frame 6 while the convex portion 23 of the manufacturing jig 20 is inserted.

  Next, with reference to FIG. 5, a process of shaping the connecting wire 8 into a predetermined shape by inserting the shaping rod portion 24 included in the second jig portion 21 b of the manufacturing jig 20 into the frame 6 will be described. Since the second jig portion 21b is integrally formed with the first jig portion 21a and the base portion 22, when the frame 6 is fixed to the magnetic circuit 10, the second jig portion 21b is inserted into the shaping jig insertion hole 6a of the frame 6. The sixth engaging portion 24a of the shaping rod portion 24 of the portion 21b is engaged. As a result, the distal end side of the sixth engagement portion 24 a protrudes to a position close to the terminal attachment portion of the frame 6, and the seventh engagement portion 24 b formed at the intermediate portion abuts the connection line 8. As shown in FIG. 5 (b), when the shaping rod portion 24 is bent and deformed so that the connection wire 8 is sandwiched between the pair of protrusions of the seventh engagement portion 24b, the connection wire 8 is brought into an appropriate position. Can be shaped. Even if the frame 6 of the electrodynamic loudspeaker 1 has a small size that makes it difficult to insert a shaping rod for shaping into a predetermined shape, the connecting wire 8 can be shaped into a predetermined shape. .

  In the electrodynamic speaker 1 shown in FIG. 5B, when the speaker diaphragm 2 and the edge 3 are bonded to the voice coil 4 and the frame 6 with an adhesive, the position of the coil 4 b of the voice coil 4 is changed to the position of the magnetic circuit 10. A loudspeaker vibration system can be constructed while maintaining high accuracy in the magnetic gap 14. Finally, when the adhesive is cured, a step of removing the convex portion 23 of the manufacturing jig 20 from the through hole 11a of the magnetic circuit 10 and removing the shaping rod portion 24 from the forming jig insertion hole 6 of the frame 6 is performed. As a result, the electrodynamic speaker 1 with less malfunction is realized. That is, if the components of the magnetic circuit 10 and the components of the vibration system are placed on the manufacturing jig 20 in order, the speaker diaphragm 2 in which the dust cap is integrally formed is used. Even if it exists, the magnetic air gap 14 of the magnetic circuit 10 can be formed with high accuracy and the voice coil 4 can be positioned. The electrodynamic speaker 1 can be manufactured by removing the manufacturing jig 20 at the end, reducing the number of preliminary processing and simplifying the manufacturing method, and reducing the manufacturing cost.

  The electrodynamic speaker 1 of this embodiment is a small electrodynamic speaker 1 having a substantially circular inverted dome-shaped speaker diaphragm 2, but a dust cap in which the voice coil holder cannot be removed from the front side. If it is an integral type speaker diaphragm 2, a plane diaphragm may be sufficient. Of course, in this method of manufacturing the electrodynamic speaker 1, the manufacturing jig 20 can be removed after the speaker diaphragm 2 is bonded to the bobbin 4a of the voice coil 4, so that the electrodynamic speaker 1 does not necessarily include the damper 5. May be. Of course, the speaker diaphragm 2 is not limited to a circular shape, and may be another diaphragm shape such as an elongated shape. As in the case of the present embodiment, an electrodynamic speaker having an excellent sound reproduction capability can be realized.

  Moreover, in the said Example, although the 1st jig | tool part 21a and the 2nd jig | tool part 21b of the manufacturing jig 20 are comprised integrally by the base 22, the 1st jig | tool part 21a is comprised with respect to the base 22. And the second jig portion 21b may be configured to be separable and used integrally in the manufacturing process of the electrodynamic speaker 1. If the base portion 22 is configured integrally, the manufacturing jig 20 is finally removed, and the electrodynamic speaker 1 can be completed.

  The electrodynamic speaker of the present invention is not only a speaker built in video / audio equipment such as a display but also a game machine having a cabinet with a built-in speaker that reproduces sound, a game machine such as a slot machine, or a vehicle Especially suitable for speakers.

DESCRIPTION OF SYMBOLS 1 Electrodynamic type speaker 2 Speaker diaphragm 3 Edge 4 Voice coil 5 Damper 6 Frame 7 Gasket 10 Magnetic circuit 11 1st yoke 12 Pole piece 13 Magnet 14 Plate 15 2nd yoke 20 Voice coil holder 21 1st jig 22 2nd Jig part 23 Convex part 24 Shaping bar part

Claims (6)

  A yoke having a plurality of through holes in the bottom, a magnet connected to the inner surface of the bottom of the yoke, and a plate that is connected to the magnet and defines a magnetic air gap that communicates with the through holes between the magnets; And a voice coil in which a coil is disposed in the magnetic gap. A frame connected to the magnetic circuit; a terminal attached to the frame; and a connection line connecting the terminal and the coil of the voice coil;
A magnetic circuit fixing portion for connecting the magnetic circuit to the magnetic circuit; a terminal mounting portion for mounting the terminal; and a shaping jig insertion hole provided close to the terminal mounting portion and penetrating the magnetic circuit fixing portion. Having
The electrodynamic speaker according to claim 1. An electrodynamic speaker manufacturing jig used for manufacturing the electrodynamic speaker according to claim 1 or 2,
The manufacturing jig includes a base that contacts the outer surface of the bottom of the yoke, and extends from the base to engage with the through-hole of the yoke. A plurality of convex portions passing therethrough,
Each of the plurality of convex portions is engaged with a first engagement portion that engages with the through hole of the yoke, a second engagement portion that engages with a side surface portion of the magnet, and a side surface portion of the plate. A third engagement portion that engages, a fourth engagement portion that engages with the inner surface of the bobbin of the voice coil, and a fifth engagement portion that engages with one end of the bobbin. The three engaging portions and the fourth engaging portion are integrally formed on the front and back sides, and the fifth engaging portion is formed between the second engaging portion and the third engaging portion.
Electrodynamic speaker manufacturing jig. The electrodynamic speaker manufacturing jig according to claim 3, which is used to manufacture the electrodynamic speaker according to claim 2.
The manufacturing jig further includes a plurality of shaping rod portions that extend from the base portion and engage with the forming jig insertion hole of the frame, and whose tip side shapes the connection line,
Each of the plurality of shaping rod portions engages with the shaping jig insertion hole of the frame, and a seventh engagement portion protrudes from the shaping jig insertion hole and contacts the connection line. And further,
Electrodynamic speaker manufacturing jig. A manufacturing method for manufacturing the electrodynamic speaker according to claim 1 or 2,
Forming the magnetic circuit using the electrodynamic speaker manufacturing jig according to claim 3 or 4;
Disposing the coil of the voice coil in the magnetic gap of the magnetic circuit;
Removing a plurality of the convex portions of the manufacturing jig from the magnetic circuit,
A method for manufacturing an electrodynamic speaker. The manufacturing method according to claim 5, wherein the electrodynamic speaker according to claim 2 is manufactured.
Connecting the frame to the magnetic circuit;
The step of shaping the connection line into a predetermined position and shape using the electrodynamic speaker manufacturing jig according to claim 4;
The plurality of convex portions of the electrodynamic speaker manufacturing jig according to claim 3 are removed from the through holes of the magnetic circuit, and the shaping rod portions are inserted into the forming jig insertion holes of the frame. A step of removing from,
A method for manufacturing an electrodynamic speaker.