Speaker equipment and manufacture of speaker equipment

【0001】

[Technical field to which the invention belongs]

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

【0002】

[Conventional technology]

Conventionally, a so-called electrokinetic type cone type speaker unit is known as an example of a speaker device for converting an electric signal into sound energy. FIG. 11 is an example thereof, and as shown in the figure, in the cone type speaker unit, for example, the voice coil 102 is wound around the center of the diaphragm (cone) 101 formed of a part of a substantially conical shape. The cylindrical voice coil bobbin 103 is provided integrally with the diaphragm 101.

【0003】

Further, the diaphragm 101 and the voice coil bobbin 103 are fixed to one end of the ring-shaped edge 108 and the damper 109 having appropriate compliance and rigidity, and the other end of the edge 108 and the damper 109 is integrated with the magnetic circuit 107. The diaphragm 101 and the voice coil bobbin 103 are elastically supported by being fixed to the frame 112 formed in the above.

【0004】

As a result, the edge 108 and the damper 109 position the voice coil 102 and the voice coil bobbin 103 in the magnetic gap of the magnetic circuit 107 composed of the magnet 104, the plate 105, the pole yoke 106, etc. without contacting the magnetic circuit. The diaphragm 101 elastically supports the magnet in a predetermined direction within a predetermined amplitude range so that the magnet can vibrate.

【0005】

Further, both ends of the voice coil 102 are connected to one end of a pair of lead wires 111 having conductivity, and the other ends of the pair of lead wires 111 are connected to a pair of terminals 110 provided in the frame 112. There is.

【0006】

Therefore, in response to the voice current supplied from the terminal 110 to the voice coil 102 via the conductive lead wire 111, the voice coil 102 moves along the piston vibration direction of the diaphragm 101 in the magnetic gap of the magnetic circuit 107. When driven, the diaphragm 101 vibrates integrally with the voice coil 102 and the voice coil bobbin 103 to convert an electric signal into acoustic energy and emit a sound wave.

【0007】

Further, the center cap 113 is fixed on the diaphragm 101 so as to close the central hole provided in the central portion of the diaphragm 101, and is provided integrally with the diaphragm 101 to form the diaphragm 101 and the voice coil 102. The structural strength is reinforced, and the split vibration of the diaphragm 101 and the voice coil 102 is suppressed as much as possible.

【0008】

Further, since the center cap 113 vibrates integrally with the diaphragm 101, the acoustic characteristics are corrected by phase-correcting the interference of sound waves caused by the shape of the diaphragm 101 or when it bears a part of the acoustic radiation power (mainly in the treble range). The effect of the acoustic characteristics caused by the central hole provided in the central portion of the diaphragm 101 is corrected as necessary.

【0009】

The conventional electrokinetic type cone type speaker unit is configured in this way, and is formed by, for example, the manufacturing methods shown in FIGS. 12 and 13 below. 13 (a) to 13 (d) are diagrams showing the manufacturing method of the cone type speaker unit shown in FIG. 11 in the order of processes, and FIG. 12 is a diagram showing the previous process of FIG. Hereinafter, the steps will be described in order.

【0010】

First, the pre-process will be described with reference to FIG. FIG. 12 is a cross-sectional structure diagram showing the structure of the coil gauge 114 together with the pre-process in which the coil gauge 114 is preliminarily incorporated into the frame assembly formed by attaching the frame 112 to the magnetic circuit 107 in advance.

【0011】

FIG. 12A shows the structure of the coil gauge 114. The coil gauge 114 is a cylindrical coil holding portion 114b made of a resin film or the like having a predetermined thickness on the cylindrical side surface of the main body portion 114a made of, for example, metal or the like. Is stuck.

【0012】

The outer diameter of the cylindrical side surface of the main body 114a (that is, the inner diameter of the coil holding portion 114b) D1 is substantially equal to the diameter of the center pole located at the center of the pole yoke 106, and the coil holding portion 114b is shown in FIG. 12 (c). As shown, it is sized so that it can be held detachably fitted by the center pole.

【0013】

Further, as shown in FIG. 12B, the outer diameter D2 of the holding portion 114b is substantially equal to the inner diameter D3 of the voice coil bobbin 103, and the coil holding portion 114b can hold the voice coil bobbin 103 so that it can be detached and fitted. The dimensions are set as follows.

【0014】

The coil gauge 114 has such a structure, and the voice coil bobbin 103 around which the voice coil 102 is wound is fitted and mounted in advance as shown in FIG. 12 (b), and then in FIG. 12 (c). As shown, the pre-process for holding the voice coil bobbin 103 is performed by fitting and mounting it on the center pole of the magnetic circuit 107.

【0015】

As a result, the voice coil bobbin 103 and the voice coil 102 are held in the magnetic gap of the magnetic circuit 107 without contacting the center pole and the plate 105 of the pole yoke 106, and are positioned with respect to the pole yoke 106 and the plate 105. ..

【0016】

Next, each step shown in FIG. 13 will be described. First, as shown in FIG. 13A, the damper 109 was placed at a predetermined position of the frame assembly described above, and then the voice coil bobbin 103 and the voice coil 102 were fitted and mounted by the previous step shown above. After inserting the coil gauge 114 into the center hole of the damper 109, the coil gauge 114 is fitted and mounted on the center pole of the pole yoke 106.

【0017】

Next, the inner peripheral side and the outer peripheral side of the damper 109 are fixed to the voice coil bobbin 103 and the frame assembly, respectively, with an adhesive or the like. At this time, both ends of the voice coil 102 are pulled out longer toward the upper surface of the damper 109.

【0018】

Next, as shown in FIG. 13 (b), the diaphragm 101 to which the edge 108 is attached in advance is placed from above the frame assembly to position the voice coil 102, and then using an adhesive or the like, the diaphragm 101 is placed. The outer peripheral portion of the edge 108 is attached and fixed to the frame assembly, and the inner peripheral portion of the diaphragm 101 is attached and fixed to the voice coil bobbin 103.

【0019】

At this time, since the movement of the voice coil bobbin 103 is restricted by the coil gauge 114, the position of the voice coil 102 and the diaphragm 101 does not shift during the fixing operation of the diaphragm 101.

【0020】

Next, as shown in FIG. 13 (c), both ends of the voice coil 102 are soldered to eyelets or the like provided in advance on the diaphragm 101, and then the coil gauge 114 is pulled out from the voice coil bobbin 103.

【0021】

Next, as shown in FIG. 13 (d), the center cap 113 is fixed to the central portion of the diaphragm 101 using an adhesive or the like, and a pair of lead wires 111 are used on the back surface side of the diaphragm 101. A cone-type speaker unit is formed by connecting both ends of the voice coil 102 and a pair of terminals 110, respectively.

【0022】

In this way, when manufacturing a cone-type speaker unit, it is necessary to accurately maintain the relative positions of the diaphragm 101 and the damper 109 until they are adhered to and fixed to the voice coil bobbin 103, and the coil gauge 114 is necessary. Therefore, the central portion of the diaphragm 101 is provided with a central hole having a diameter slightly larger than the maximum outer diameter of the coil gauge 114.

【0023】

Since the structural strength of the diaphragm 101 is reduced due to the opening of the center hole, the center cap 113 is usually used to reinforce the diaphragm 101, but originally, the diaphragm 101 is provided under a certain thickness. In order to form the diaphragm with high rigidity, it is desirable that the entire diaphragm 101 is integrally molded including the shape of the center cap 113.

【0024】

That is, it is desirable that the diaphragm 101 has high rigidity and the sound waves radiated from each region of the diaphragm are radiated in the same phase as possible without interfering with each other. There is an integrated diaphragm such as a flat diaphragm made of a material having.

【0025】

FIG. 14 is a diagram showing an example of a flat speaker unit using a flat diaphragm together with a part of the manufacturing process thereof. In FIG. 14, the same reference numerals are given to the parts equivalent to those in FIGS. 11 to 12.

【0026】

The manufacturing method of this flat speaker unit is performed in the following process order. That is, first, as shown in FIG. 14A, the damper 109 is placed at a predetermined position of the frame assembly formed by attaching the frame 115 for the flat speaker unit to the magnetic circuit 107 in advance, and then first. The coil gauge 114 fitted and mounted on the voice coil bobbin 103 and the voice coil 102 is inserted into the center hole of the damper 109 and then fitted and mounted on the center pole of the pole yoke 106 by the previous step shown in 1.

【0027】

Next, the inner peripheral side and the outer peripheral side of the damper 109 are fixed to the voice coil bobbin 103 and the frame assembly, respectively, with an adhesive or the like. At this time, both ends of the voice coil 102 are pulled out longer toward the upper surface of the damper 109.

【0028】

Next, as shown in FIG. 14B, after connecting both ends of the voice coil 102 and the pair of terminals 110 using a pair of lead wires 111, the coil is connected to the voice coil bobbin 103 fixed to the damper 109. Remove the gauge 114.

【0029】

Next, as shown in FIG. 14 (c), a flat diaphragm 117 having a flat shape to which an edge 116 is attached in advance is placed from above the frame assembly to position the voice coil 102, and then an adhesive or the like is used. Is used to attach and fix the outer peripheral portion of the edge 116 to the frame assembly, and attach and fix the back surface side of the diaphragm 117 to the voice coil bobbin 103.

【0030】

Since the flat speaker unit is manufactured as described above, it is not necessary to reinforce the diaphragm with the center cap 113 as in the case of the above-described method for manufacturing the cone type speaker unit.

【0031】

As described above, the connection work of the lead wire 111 in the flat speaker unit is performed before fixing the diaphragm 117. In the case of the cone type speaker unit, the diaphragm 101 has a substantially conical shape. Since it is formed in a part of the speaker unit, a sufficient space is secured on the back surface side of the diaphragm 101 so that the lead wire 111 can be easily connected even after the diaphragm 101 is fixed. In this case, since the diaphragm 117 has a flat shape, the space between the diaphragm 117 and the damper 109 is narrow, which makes it difficult to connect the lead wire 111.

【0032】

[Problems to be Solved by the Invention]

However, as described above, in the manufacturing process of this type of speaker unit, the diaphragm 117 is positioned and fixed to the voice coil bobbin 103 which is simply suspended and supported by the damper 109 by removing the coil gauge 114. , The voice coil bobbin 103 and the diaphragm 117 may be misaligned during the fixing work, and may not be fixed as they were initially positioned.

【0033】

As a result, the relative positions of the voice coil 102 of the speaker unit and the magnetic circuit 107 are displaced, and the voice coil 102 and the voice coil bobbin 103 come into contact with the pole yoke within the gap of the magnetic circuit 107, so that the electricity supplied to the voice coil 102 is supplied. It becomes difficult to faithfully convert the signal into acoustic energy and reproduce it.

【0034】

Therefore, in the conventional flat speaker unit, the compliance of the damper 109 and the edge 116 is set within a certain range, and the flat speaker unit is manufactured within a range that does not interfere with the fixing work of the voice coil bobbin 103 and the diaphragm 117. Was there.

【0035】

However, the compliance of damper 109 and edge 116 is the lowest resonance frequency (f) of the flat speaker unit.₀) To expand the low-frequency reproduction range, or to increase the amplitude of the voice coil 102 to increase the sound pressure of the diaphragm 117, it is necessary to set a large value. Although it is possible to improve the acoustic characteristics such as the reproduction frequency band and the maximum sound pressure of the speaker unit, there is a limit to the compliance setting of the damper 109 and the edge 116 as long as the above-mentioned manufacturing method is used, and the acoustic characteristics of the speaker unit. Was difficult to improve.

【0036】

The present invention has been made in view of the above-mentioned problems, and provides a speaker device that can be easily manufactured and has good acoustic characteristics, and a method for manufacturing the speaker device.

【0037】

[Means for solving problems]<u style="single"> One feature of the speaker device of the present invention is</u>A positioning part for positioning the diaphragm was provided on the back surface side of the diaphragm.<u style="single">It is in.</u>【0038】

Also,<u style="single">this</u>The positioning unit positions the diaphragm with respect to the magnetic circuit by fitting with a jig protruding through the central hole of the magnetic circuit.<u style="single">。</u>【0039】

Also,<u style="single">Other features of the present invention are described above.</u>In the speaker device, the diaphragm is supported at a predetermined position by a jig that fits with the positioning portion.

【0040】

Also,<u style="single">Other features of the speaker device of the present invention</u>Is<u style="single">For one thing</u>A positioning member for positioning the diaphragm is fixed on the back surface side of the diaphragm.<u style="single">It is in.</u>【0041】

Also,<u style="single">this</u>The positioning member is characterized by being provided with a diaphragm positioning portion that positions the diaphragm with respect to the magnetic circuit by fitting with a jig protruding through a central hole of the magnetic circuit.

【0042】

Also,<u style="single">Other features of the present invention are described above.</u>The speaker device is characterized in that the positioning member is provided with a joint portion to be joined to the coil.

【0043】

Also,<u style="single">As mentioned above</u>The speaker device of the above is characterized by having a power supply damper provided with a power supply unit electrically connected to a coil.

【0044】

Also,<u style="single">As mentioned above</u>In the speaker device of the above, the diaphragm is characterized in that a center cap is integrally formed.

【0045】

Also,<u style="single">Book</u>The invention is a process of fixing a magnetic circuit and a frame, a process of positioning a coil with respect to a center pole of the magnetic circuit, a process of connecting a damper between the coil and the frame, and a process of healing from the center hole of the center pole. The process of projecting the tool, the process of fitting the positioning part provided on the back side of the diaphragm and the jig to position the diaphragm with respect to the center pole, and connecting the positioned diaphragm to the coil and frame. It comprises a method of manufacturing a speaker apparatus, which comprises the process of performing.

【0046】

Also,<u style="single">The features of the present invention are described above.</u>In the method of manufacturing a speaker device, the damper comprises a power feeding damper provided with a power feeding unit, and has a step of electrically connecting the power feeding unit and the coil.

【0047】

Also,<u style="single">As mentioned above</u>In the method of manufacturing a speaker device, the diaphragm is characterized in that a center cap is integrally formed. Further, in the above-mentioned manufacturing method of the speaker device, the entire diaphragm is integrally formed, and the damper includes the feeding line to the coil.<u style="single">It is formed</u>Characterized by<u style="single">。</u>【0048】

[Action]

Since the present invention is configured as described above, the jig protruding through the central hole of the magnetic circuit is fitted with the positioning portion provided on the back surface of the diaphragm, so that the positioning member of the positioning portion becomes the diaphragm. Is positioned at a predetermined position with respect to the magnetic circuit, the coil is joined to the joint provided in the positioning part, and the power supply part provided in the power supply damper is joined to the joint part so that the power supply part is electrically connected to the coil. Therefore, the diaphragm can be reliably positioned and fixed to the magnetic circuit, and the coil and diaphragm can be fixed without breaking the positional relationship between the coil and diaphragm that were initially positioned. be able to. Therefore, it is possible to easily manufacture a speaker device in which the coil and the diaphragm are well positioned with respect to the magnetic circuit, and the speaker device has better acoustic characteristics as compared with the conventional speaker device in which the entire diaphragm is integrally formed. Can be provided.

【0049】

BEST MODE FOR CARRYING OUT THE INVENTION

Next, an embodiment suitable for the present invention will be described below with reference to the drawings. FIG. 1 is a cross-sectional structural view of a main part of an electrokinetic type cone-type speaker unit showing an example of a speaker device according to an embodiment of the present invention. In the figure, the diaphragm 1 is formed so as to have a parabolic shape having substantially the same thickness in cross section, for example, by integrally molding paper or resin.

【0050】

Therefore, the diaphragm 1 is composed of a curved surface that is closed over the entire surface in a substantially circular region to which a ring-shaped edge 2 having appropriate compliance and rigidity is attached. No circular opening is formed for the insertion.

【0051】

Further, in the vicinity of the center on the back surface side of the diaphragm 1, for example, a holder 3 made of ABS resin or the like is fixed and integrally formed with the diaphragm 1.

【0052】

Further, the holder 3 is fitted into a voice coil ASSY (hereinafter referred to as a coil) formed by winding a voice coil 4 and fixing it to a cylindrical voice coil bobbin 5, and the diaphragm 1, voice coil 4, and voice are fitted. It is fixed and formed integrally with the coil bobbin 5.

【0053】

Further, the holder 3 and the voice coil bobbin 5 are fixed to the inner peripheral side of the ring-shaped damper 6 having appropriate compliance and rigidity. Further, the outer peripheral sides of the edge 2 and the damper 6 are fixed to a frame 11 integrally formed with a magnetic circuit 10 composed of a magnet 7, a plate 8, a pole yoke 9, and the like, respectively.

【0054】

The pole yoke 9 formed by the magnetic circuit 10 has a shape in which a substantially cylindrical center pole is erected in the center of a circular plate on which the magnet 7 is placed, and a cylindrical center hole 9a coaxial with the center pole. Is formed through.

【0055】

Further, the edge 2 and the damper 6 have a cross-sectional shape that can obtain a predetermined amplitude, and both elastically support the diaphragm 1, the holder 3, the voice coil 4, and the voice coil bobbin 5.

【0056】

As a result, the edge 2 and the damper 6 arrange the voice coil 4 and the voice coil bobbin 5 at predetermined positions in the magnetic gap of the magnetic circuit 10 without contacting the magnetic circuit, and the diaphragm 1 is predetermined in the predetermined direction. It is elastically supported so that the piston can vibrate within the amplitude range.

【0057】

Further, both ends of the voice coil 4 are connected to one end side of each of a pair of feeder lines (not shown) provided in the damper 6, and further, the other end side of each of the pair of feeder lines is provided on the frame 11. Each of the pair of terminals 12 is electrically connected.

【0058】

Therefore, the voice coil 4 moves in the piston vibration direction of the diaphragm 1 in the magnetic gap of the magnetic circuit 10 according to the voice current supplied from the terminal 12 to the voice coil 4 via the power supply line provided in the damper 6. By being driven along the line, the diaphragm 1 vibrates integrally with the holder 3, the voice coil 4, and the voice coil bobbin 5, converts an electric signal into acoustic energy, and emits a sound wave. The cone-type speaker unit according to the embodiment of the present invention generally has such a structure.

【0059】

Next, the detailed structure of each main part of the cone type speaker unit will be described. First, the details of the diaphragm 1 will be described. FIG. 2 is a detailed cross-sectional view showing an example of the diaphragm 1, (a) shows the cross-sectional shape of the diaphragm 1 with the edge 2 attached, and (b) is the cross-sectional shape of the arrow A in (a). An enlarged view of each part is shown. As shown in FIG. 2B, holder mounting portions 1a and 1b formed of ring-shaped protrusions are provided coaxially with the central axis X of the diaphragm 1 on the back surface side of the diaphragm 1.

【0060】

Next, the details of the holder 3 will be described. FIG. 3 is a structural view showing an example of the holder 3, (a) shows a view seen from the top surface, (b) shows a view seen from the side surface, and (c) shows a view seen from the bottom surface. , (D) show a cross-sectional view seen from the side surface side.

【0061】

As can be seen from FIG. 3, guides 3a and 3b formed of ring-shaped protrusions and circular guide holes 3c are provided coaxially with the central axis Y on the bottom surface side of the holder 3. The shape and dimensions of the inner surface side of the guide 3a are set so that the jig 14 used in the manufacturing process described later of the cone type speaker unit can be detached and fitted.

【0062】

Further, the shape and dimensions of the guide 3b are set so that the inner surface side fits with the voice coil bobbin 5. Further, the shape and dimensions of the guide hole 3c are set so as to fit with the holder mounting portion 1a of the diaphragm 1. Further, the maximum outer diameter of the holder 3 is regulated so that the holder 3 can be mounted on the diaphragm 1 inside the holder mounting portion 1b.

【0063】

FIG. 4 is a diagram showing a state in which the diaphragm 1 and the jig 14 are fitted to the holder 3. As can be seen from the figure, the surfaces of the diaphragm 1 and the holder 3 in contact with each other are set in size and shape so that the guide holes 3c are in close contact with each other when the guide holes 3c are fitted with the guides 3a.

【0064】

Further, the surfaces of the diaphragm 1 and the holder 3 in contact with each other are fixed by an adhesive or the like as described above. In this case, the adhesive of the holder mounting portion 1b protrudes to the outside of the holder mounting portion 1b. It also has the role of restricting the mass balance of the diaphragm 1 including the adhesive so that it does not become extremely asymmetric with respect to the central axis X.

【0065】

Further, as shown in FIG. 4, when the diaphragm 1 and the holder 3 are fitted and fixed, the central axis X of the diaphragm 1 and the central axis Y of the holder 3 coincide with each other. They maintain coaxiality with each other with high accuracy and become one.

【0066】

Next, the details of the damper 6 will be described. 5A and 5B are structural views showing an example of the damper 6, in which FIG. 5A shows a view seen from above and FIG. 5B shows a partially represented perspective view. As shown in the figure, the damper 6 is a pair of feeder lines 6a having conductivity made of copper foil or the like on the surface of a so-called corrugation damper in which a cloth is impregnated with resin and heat-molded to form concentric irregularities. 6b is attached and formed in a ring shape.

【0067】

The pair of feeder lines 6a and 6b may be formed by impregnating a cloth with resin and heat-molding them, and then arranging them radially along concentric irregularities with an adhesive, a dumping agent, or the like, or heat-molding them in advance. It may be formed on a cloth in advance and unevenly formed by heat molding. Further, a central hole 6c for inserting a coil is provided in the central portion of the damper 6. The cone type speaker unit in the embodiment of the present invention is configured as described above.

【0068】

Next, a method of manufacturing the cone type speaker unit according to the embodiment of the present invention will be described below. 6 and 7 are views showing an example of a method for manufacturing a cone-type speaker unit according to the embodiment of the present invention in order of steps, and FIG. 6 is a pre-process of FIG. 7. Hereinafter, the steps will be described in order.

【0069】

First, the pre-process will be described with reference to FIG. FIG. 6 is a cross-sectional structure diagram showing a pre-process in which the coil gauge 13 is preliminarily incorporated into the frame assembly formed by attaching the frame 11 to the magnetic circuit 10 in advance, together with the structure of the coil gauge 13.

【0070】

FIG. 6A shows the structure of the coil gauge 13, and the coil gauge 13 has a predetermined thickness on the cylindrical side surface of the main body portion 13a made of, for example, metal, like the conventional coil gauge 114 described above. A cylindrical coil holding portion 13b made of a resin film or the like is fixed.

【0071】

The outer diameter of the cylindrical side surface of the main body 13a (that is, the inner diameter of the coil holding portion 13b) D4 is substantially equal to the outer diameter of the center pole located at the center of the pole yoke 9, and the coil holding portion 13b is shown in FIG. 6 (c). ), The size is set so that the center pole can hold it so that it can be detached and fitted.

【0072】

Further, as shown in FIG. 6B, the outer diameter D5 of the coil holding portion 13b is substantially equal to the inner diameter D6 of the voice coil bobbin 5, and the coil holding portion 13b holds the voice coil bobbin 5 so that it can be detached and fitted. The dimensions are set so that it can be done.

【0073】

The coil gauge 13 has such a structure, and the voice coil bobbin 5 around which the voice coil 4 is wound is fitted and mounted in advance as shown in FIG. 6 (b), and then in FIG. 6 (c). As shown, the pre-process for holding the voice coil bobbin 5 is performed by fitting and mounting it on the center pole of the magnetic circuit 10.

【0074】

As a result, the voice coil bobbin 5 and the voice coil 4 are held in the magnetic gap of the magnetic circuit 10 without contacting the center pole and the plate 8 of the pole yoke 9, and are positioned with respect to the pole yoke 9 and the plate 8. ..

【0075】

Next, each step shown in FIG. 7 will be described. First, as shown in FIG. 7A, the damper 6 was placed at a predetermined position of the frame assembly described above, and then the coil described above was fitted and mounted by the previous step shown in FIG. After inserting the coil gauge 13 into the center hole 6c of the damper 6, the coil gauge 13 is fitted and mounted in the center hole 9a of the pole yoke 9 to arrange the coil at a predetermined position.

【0076】

Next, the inner peripheral side and the outer peripheral side of the damper 6 are adhered to the voice coil bobbin 5 and the frame assembly, respectively, with an adhesive or the like. At this time, both ends of the voice coil 4 are pulled out to the upper surface side of the damper 6 for a long time.

【0077】

Next, after the damper 6 is fixed to the voice coil bobbin 5 and the frame ASSY, the voice coil 4 is electrically connected to the pair of feeder lines 6a and 6b in the vicinity of the center hole 6c of the damper 6, and a pair of feed lines 6a and 6b are electrically connected to each other. The other end side of the feeder lines 6a and 6b (that is, the outer peripheral side of the damper 6) is electrically connected to the pair of terminals 12, respectively.

【0078】

In this state, the diaphragm 1 is not yet fixed to the damper 6 and the voice coil bobbin 5, so that the connection processing at both ends of the feeder lines 6a and 6b needs to be performed in a narrow space between the damper and the diaphragm as in the past. Since the voice coil bobbin 5 can be fixed to the coil gauge 13 in a state where the voice coil bobbin 5 is fixed to the coil gauge 13, the voice coil bobbin 5 can be easily, stably and surely performed. After the feeder lines 6a and 6b are connected to the voice coil 4 and the terminal 12, the coil gauge 13 is pulled out from the voice coil bobbin 5 to be separated.

【0079】

Next, as shown in FIG. 7B, the jig 14 is inserted through the center hole 9a from the bottom surface of the pole yoke 9 and protrudes from the center pole.

【0080】

FIG. 8 shows a schematic cross-sectional structure of the jig 14. The jig 14 is made of a material having excellent wear resistance, processing accuracy, and processability, such as Delrin, and has a predetermined height at the center of the disc-shaped base 14a as shown in FIG. A cylindrical upright portion 14b is provided and integrally formed.

【0081】

As can be seen from the figure, the upright portion 14b is formed so that the outer diameter (D7) near the root on the base 14a side can be detached and fitted to the center hole 9a of the pole yoke 9. The outer diameter (D8) near the tip of the upright portion 14b is set so that the inner surface side of the guide 3a of the holder 3 can be detached and fitted.

【0082】

Further, the upright portion 14b has a step portion 14c having a surface parallel to the base 14a, and as shown in FIG. 4, when the inner surface side of the guide 3a of the holder 3 fits into the upright portion 14b, the guide 3a It is formed so as to support the holder 3 by contacting the bottom surface of the holder 3. The jig 14 is formed as described above.

【0083】

Further, in FIG. 7 (b), as shown in the damper FIG. 7 (b), after the jig 14 is projected from the center pole of the pole yoke 9, it is projected from the innermost peripheral portion of the damper 6 and the damper 6. After applying the adhesive all around the side surface of the voice coil bobbin 5, the guide 3a of the holder 3 is fitted into the upright portion 14b and placed on the step portion 14c.

【0084】

As a result, the guide 3a is supported by the step portion 14c while the coil maintains the predetermined position shown in FIG. 7A with respect to the magnetic circuit, and the guide 3b is fixed to the damper 6 and the coil.

【0085】

Next, in FIG. 7 (c), after applying the adhesive to the place where the edge 2 of the frame assembly is attached and the place where the diaphragm 1 is attached on the surface of the holder 3, the vibration to which the edge 2 is attached in advance. The plate 1 (see FIG. 2) is placed from above, and the holder mounting portion 1a of the diaphragm 1 is fitted into the center hole 3c of the holder 3 to fix the diaphragm 1 to the holder 3, and the outer peripheral portion of the edge 2. Is fixed to the frame assembly. As a result, the diaphragm 1 is fixed to the holder 3 in a state of being positioned at a predetermined position. Next, when the jig 14 is separated from the holder 3 and then pulled out from the center hole 9a, a cone-type speaker unit is formed.

【0086】

In the above-described embodiment, the diaphragm 1 is composed of a curved surface that is closed over the entire surface within a substantially circular region to which the edge 2 is attached, but the present invention is not limited to this. That is, the diaphragm may have an opening as long as the diaphragm is provided with guides 1a, 1b, etc. for positioning the diaphragm with respect to the magnetic circuit in the manufacture of the speaker device. Further, if necessary, an opening may be provided in the diaphragm to close the opening later. Further, in the above-described embodiment, the damper 6 and the voice coil 4 are fixed to the holder 3 and then the holder 3 and the diaphragm 1 are fixed to each other. However, the holder 3 and the diaphragm 1 are fixed in advance. After that, the damper 6 and the voice coil 4 may be fixed to the holder 3.

【0087】

Further, in the above-described embodiment, the center cap is not particularly provided, but if necessary, a center cap as seen in the prior art may be used in combination. In that case, the center cap attachment step can be performed at any time after the step of attaching the diaphragm.

【0088】

Further, the pair of feeder lines 6a and 6b of the damper 6 used in the cone type speaker unit are provided on the surface of the heat-molded cloth, but the present invention is not limited to this, and for example, as shown in FIG. The feeder lines 15a and 15b of the above may be formed radially from the center hole 15c in a state of being woven into the cloth. FIG. 9 is a structural diagram showing another example of the damper 15 used in the speaker device according to the present invention, (a) shows a view seen from above, and (b) shows a partially represented perspective view. ..

【0089】

Further, in the above-described embodiment, the holder 3 and the jig 14 are fitted so that the upright portion 14b is inserted into the inner surface side of the guide 3a on the bottom surface side (the surface side facing the jig 14) of the holder 3. In addition to this, as shown in FIG. 10, for example, the holder 16 is fitted to the jig 17 by fitting the protrusion 16a of the holder 16 fixed to the diaphragm 1 into the recess 17a of the jig 17. It may be manufactured by supporting it in a predetermined position.

【0090】

In this case, since the area where the protrusion 16a and the recess 17a fit into each other can be set wider, the jig 17 can support the holder 16 in a more stable state. As shown in FIG. 10, the holder 16 has a structure in which a protrusion 16a is provided in the central portion instead of the guide hole 3c of the holder 3. Further, the jig 17 has a structure in which the jig 14 is further provided with a recess 17a.

【0091】

Further, in the method of manufacturing the speaker device using the holder 16 and the jig 17, the height of the guide of the holder 16 (corresponding to the guide 3b of the holder 3) to be fitted to the voice coil bobbin 5 is not set too high. Can be reliably supported. Therefore, the added mass can be reduced as much as possible without changing the radiation area of the diaphragm of the speaker device, and the acoustic conversion efficiency is increased.

【0092】

[Effect of the invention]

Since the present invention is configured as described above, the jig protruding through the central hole of the magnetic circuit is fitted with the positioning portion provided on the back surface of the diaphragm, so that the positioning member of the positioning portion can form the diaphragm. Position the magnetic circuit at a predetermined position, join the coil to the joint provided in the positioning part, and join the power supply part provided in the power supply damper to the joint part so that the power supply part is electrically connected to the coil. Therefore, the diaphragm can be reliably positioned and fixed to the magnetic circuit, and the coil and diaphragm should be fixed without breaking the positional relationship between the coil and diaphragm that were initially positioned. Can be done. Therefore, it is possible to easily manufacture a speaker device in which the coil and the diaphragm are well positioned with respect to the magnetic circuit, and the speaker device has better acoustic characteristics as compared with the conventional speaker device in which the entire diaphragm is integrally formed. Can be provided.

[Simple explanation of drawings]

FIG. 1 is a diagram showing an example of a speaker device according to an embodiment of the present invention.

FIG. 2 is a detailed cross-sectional view showing an example of a diaphragm.

FIG. 3 is a structural diagram showing an example of a holder.

FIG. 4 is a diagram showing a state in which a diaphragm and a jig are fitted to a holder.

FIG. 5 is a structural diagram showing an example of a damper.

FIG. 6 is a diagram showing an example of a method for manufacturing a cone-type speaker unit according to an embodiment of the present invention in order of steps. (Preliminary Process of Steps Shown in FIG. 7) FIG. 7 is a diagram showing an example of a method for manufacturing a cone-type speaker unit according to an embodiment of the present invention in order of steps.

FIG. 8 is a schematic cross-sectional structural view of a jig used for manufacturing the cone type speaker unit according to the embodiment of the present invention.

FIG. 9 is a structural diagram showing another example of a damper used in the speaker device according to the present invention.

FIG. 10 is a diagram showing a state in which a holder of a cone-type speaker unit according to another embodiment of the present invention is fitted with a jig.

FIG. 11 is a diagram showing an example of a conventional electrokinetic type cone type speaker unit.

FIG. 12 is a diagram showing a conventional method of manufacturing an electrokinetic type cone type speaker unit in process order. (Pre-process of the process shown in FIG. 13) [Fig. 13] Fig. 13 is a diagram showing a conventional method of manufacturing an electrokinetic type cone type speaker unit in order of process.

FIG. 14 is a diagram showing an example of a flat speaker unit using a flat diaphragm together with a part of the manufacturing process thereof.

[Explanation of symbols]

1 Vibration plate 1a Holder mounting part 1b Holder mounting part 2 Edge 3 Holder 3a Guide 3b Guide 3c Guide hole 4 Voice coil 5 Voice coil Bobbin 6 Damper 6a Feed line 6b Feed line 6c Center Hole 7 Magnet 8 Plate 9 Pole yoke 9a Center hole 10 Magnetic circuit 11 Frame 12 Terminal 13 Coil gauge 13a Main body 13b Coil holding part 14 Jigger 14a Base 14b Upright part 14c Step part 15 Damper 15a Feed line 15b Feed line 15c Center hole 16 Holder 16a Protrusion 17 Jigger 17a Recess