JP2003259497A - Manufacturing method of speaker - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a manufacturing method of a speaker capable of easily manufacturing the speaker provided with a diaphragm integrated with a center cap. <P>SOLUTION: In a first process, a voice coil bobbin with a gauge inserted into a center hole is inserted to an inner circumferential frame 10a of a butterfly damper 10 stuck a fixing sheet 20 which fixes so as not to prevent an arm section 10c from being elastically deformed, and is attached to the magnetic circuit. The outer circumferential frame 10b is fixed to the frame. The inner circumferential frame 10a is fixed to the voice coil bobbin. In a second process, the gauge is pulled out, and a diaphragm integrated with a center cap is fixed to the voice coil bobbin and the frame. In a third process, the fixing sheet 20 stuck on the butterfly damper 10 is removed. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a speaker manufacturing method, and more particularly to a speaker manufacturing method having a damper.

[0002]

2. Description of the Related Art Conventionally, a so-called cone type speaker is known as an example of a speaker for converting an electric signal into acoustic energy. FIG. 6 shows an example thereof. As shown in FIG. 6, in a cone type speaker, a voice coil 102 is wound around a central portion of a diaphragm (cone) 101 formed by, for example, a part of a substantially conical shape. A cylindrical voice coil bobbin 103 is provided integrally with the diaphragm 101.

The diaphragm 101 is fixed to one end of a ring-shaped edge 108 having both appropriate compliance and rigidity, and the voice coil bobbin 103 is fixed to one end of a damper 109. Further, the other ends of the edge 108 and the damper 109 are fixed to a frame 112 formed integrally with the magnetic circuit 107 to elastically support the diaphragm 101 and the voice coil bobbin 103.

As a result, the edge 108 and the damper 10 are
9 is a voice coil 102 and a voice coil bobbin 10.
3 is arranged at a predetermined position 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 107, and the diaphragm 101 has a predetermined amplitude in a predetermined direction. The piston is elastically supported within the range so that it can vibrate.

Both ends of the voice coil 102 are connected to one ends of a pair of conductive lead wires 111, and the other ends of the pair of lead wires 111 are connected to each other.
It is connected to a pair of terminals 110 provided on the frame 112.

Therefore, the voice coil 102 is moved to the magnetic circuit 10 in response to the voice current supplied from the terminal 110 to the voice coil 102 via the conductive lead wire 111.
7 is driven along the piston vibration direction of the diaphragm 101 within the magnetic gap of the diaphragm 101.
But voice coil 102 and voice coil bobbin 103
It vibrates integrally with and converts electric signals into acoustic energy and emits sound waves.

Further, the center cap 113 has a diaphragm 1 so as to close a central hole provided in the central portion of the diaphragm 101.
01 is fixed on 01 and integrally provided with the diaphragm 101, the structural strength of the diaphragm 101 and the voice coil 102 is reinforced, and the divided vibration of the diaphragm 101 and the voice coil 102 is suppressed as much as possible.

Further, since the center cap 113 vibrates integrally with the diaphragm 101, the phase of the interference of sound waves caused by a part of the acoustic radiation power (mainly in the high frequency range) and the shape of the diaphragm 101 is corrected. And has a role of varying the acoustic characteristics, and corrects the influence of the acoustic characteristics caused by the central hole provided in the central portion of the diaphragm 101 as necessary.

The conventional cone type speaker is constructed in this way, and is formed, for example, by the manufacturing method shown in FIGS. 7 and 8 below. 8A to 8D are views showing a method of manufacturing the cone type speaker shown in FIG. 6 in the order of steps.
FIG. 9 is a diagram showing a pre-process of FIG. 8. The steps will be described below in order.

First, the pre-process will be described with reference to FIG. Figure 7
FIG. 7 is a sectional structural view showing a process in which the coil gauge 114 is incorporated into a frame ASSY formed by attaching the frame 112 to the magnetic circuit 107. Figure 7 (a)
Is the structure of the coil gauge 114. Coil gauge 1
14, a cylindrical coil holding portion 114b made of a resin film or the like having a predetermined thickness is fixed to a cylindrical side surface of a main body portion 114a made of metal or the like.

The outer diameter D1 of the cylindrical side surface of the main body 114a (that is, the inner diameter of the coil holding portion 114b) is equal to the pole yoke 106.
7 is substantially equal to the diameter of the center pole located in the central part of the coil, and the coil holding portion 114b is dimensioned so that it can be detachably fitted and held by the center pole as shown in FIG. 7 (c). Also, the outer diameter D of the holding portion 114b
2 is a voice coil bobbin 1 as shown in FIG.
03 is substantially equal to the inner diameter D3 of the coil holding portion 114
b is dimensioned so that it can hold the voice coil bobbin 103 so that it can be disengaged.

The coil gauge 114 has such a structure, and as shown in FIG. 7B, the voice coil 102 is previously prepared.
The voice coil bobbin 103 wound around is fitted and attached, and then, as shown in FIG. 7C, the voice coil bobbin 103 is held by fitting and attached to the center pole of the magnetic circuit 107. Is done.

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 coming into contact with the center pole of the pole yoke 106 and the plate 105.
Positioning with respect to the pole yoke 106 and the plate 105 is performed.

Next, each step shown in FIG. 8 will be described. First, as shown in FIG. 8A, the above-mentioned frame ASS
After placing the damper 109 at a predetermined position of Y and then inserting the coil gauge 114 fitted with the voice coil bobbin 103 and the voice coil 102 through the center hole of the damper 109 by the preceding step shown above. , Pole yoke 10
Fit and attach to the 6 center pole.

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 ASSY, respectively, with an adhesive or the like. At this time, both ends of the voice coil 102 are pulled out to the upper surface side of the damper 109 for a long time.

Next, as shown in FIG. 8B, the diaphragm 101 to which the edge 108 is attached in advance is attached to the frame A.
It is placed from above the SSY to perform positioning with respect to the voice coil 102, and then the edge 10
The outer peripheral part of 8 is fixed to the frame ASSY and the inner peripheral part of the diaphragm 101 is fixed to the voice coil bobbin 1.
Attach to 03 and fix.

At this time, the voice coil bobbin 103 is
Since the movement is restricted by the coil gauge 114, the positional displacement between the voice coil 102 and the diaphragm 101 does not occur during the fixing work of the diaphragm 101. Next, as shown in FIG. 8C, 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.

Next, as shown in FIG. 8D, a center cap 11 is attached to the central portion of the diaphragm 101 using an adhesive or the like.
3 is fixed, and a pair of lead wires 111 are used to connect both ends of the voice coil 102 and the pair of terminals 110 on the back surface side of the diaphragm 101, thereby forming a cone-type speaker.

As described above, in the case of manufacturing a cone type speaker, it is necessary to maintain the relative position of each other with high accuracy until the diaphragm 101 and the damper 109 are bonded and fixed to the voice coil bobbin 103. 11
4 is required. Therefore, the central portion of the diaphragm 101 is provided with a center hole having a diameter slightly larger than the maximum outer diameter of the coil gauge 114.

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

[0021]

However, in the speaker provided with the diaphragm 101 integrated with the center cap 113 described above, the diaphragm 101 is formed as in the manufacturing process described above.
It is impossible to remove the coil gauge 114 after fixing the to the voice coil bobbin 103. Therefore, before attaching the diaphragm 101, it is necessary to remove the coil gauge 114 and position and fix the diaphragm 101 to the voice coil bobbin 103 which is only floatingly supported by the damper 109. Therefore, the voice coil bobbin 103
When the diaphragm 101 is fixed, there is a possibility that the two will be misaligned and cannot be fixed according to the positioning at the time of bonding.

As a result, the voice coil 102 of the speaker
Since the relative position of the magnetic circuit 107 and the voice coil 102 or the voice coil bobbin 103 contacts the pole yoke in the gap of the magnetic circuit 107, the electric signal supplied to the voice coil 102 is faithfully converted into acoustic energy. It becomes difficult to reproduce.

In view of the above problems, an object of the present invention is to provide a method of manufacturing a speaker that can easily manufacture a speaker including a center cap-integrated diaphragm.

[0024]

The invention according to claim 1 made in order to solve the above problems, an inner peripheral portion to which a voice coil bobbin is fixed, an outer peripheral portion to which a frame is fixed, and the inner peripheral portion. And a method of manufacturing a speaker including a damper having an elastically deformable portion provided between the outer peripheral portions, wherein the voice coil bobbin is provided with a gauge for positioning the voice coil bobbin with respect to a magnetic circuit, A fixing sheet that fixes the elastically deforming portion so as not to elastically deform is passed through the inner peripheral portion of the damper that is releasably attached, and the magnetic circuit is attached, and the outer peripheral portion is a frame and the inner peripheral portion is the aforesaid. The first step of fixing each to the voice coil bobbin, and after the first step, remove the gauge from the voice coil bobbin and cover the voice coil bobbin. A second step of fixing a vibration plate integrally formed with a tar cap to the voice coil bobbin and the frame, and a third step of peeling off the fixing sheet attached to the damper after the second step. The present invention resides in a method of manufacturing a speaker.

According to the first aspect of the present invention, even if the work of fixing the diaphragm to the voice coil and the frame is performed with the gauge removed, the fixing sheet fixes the elastic deformation portion of the damper so as not to deform. Since the elastically deformable portion of the damper is deformed during the fixing work and the voice coil bobbin moves, the diaphragm cannot be fixed to the voice coil as originally positioned.

The invention according to claim 2 is the method for manufacturing a speaker according to claim 1, wherein the damper has an inner peripheral frame and an outer peripheral frame formed as the inner peripheral part and the outer peripheral part, respectively. The deformation part is an arm-shaped damper, wherein the arm-shaped elastic deformation part includes a peripheral part, an inner peripheral connecting part that connects one end of the peripheral part and the inner peripheral frame, and the peripheral part. The damper has an outer peripheral connecting portion that connects the other end of the side portion and the outer peripheral frame, and the damper is provided with a plurality of the arm-like elastically deforming portions, and the inner peripheral connecting portion of one of the arm-like elastically deforming portions is provided. Next to, when using the one provided with the outer peripheral connecting portion of the other arm-shaped elastically deformable portion, the fixed sheet, the inner peripheral connecting portion of the one arm-like elastically deformable portion,
A speaker manufacturing method is characterized in that a speaker is attached so as to cover both of the other arm-like elastically deforming portion provided adjacently and the outer peripheral connecting portion.

According to the second aspect of the present invention, the fixing sheet includes the inner peripheral connecting portion of one arm-like elastically deforming portion and the outer peripheral connecting portion of the other arm-like elastically deformable portion provided next to it. By sticking so as to cover both, both ends of the peripheral portion are fixed, so that the elastic deformation portion is fixed more firmly.

The invention according to claim 3 is the method for manufacturing a speaker according to claim 2, wherein the peripheral portion is along the outer periphery of the inner peripheral frame and the inner periphery of the outer peripheral frame. And the manufacturing method of the speaker.

According to the invention described in claim 3, the peripheral portion is
Along the outer circumference of the inner peripheral frame and the inner circumference of the outer peripheral frame. Therefore, by the fixing member, the inner peripheral connecting portion of the one arm portion,
By connecting the outer peripheral connecting portion of another arm portion provided next to the arm portion, the fixing of the arm portion to the outer peripheral frame is further strengthened.

According to a fourth aspect of the present invention, in the method for manufacturing the speaker according to the first aspect, the damper is a corrugation damper in which the elastically deformable portion has an uneven shape, and the fixing sheet is the A speaker manufacturing method is characterized in that an uneven elastic deformation portion having the same unevenness is used.

According to the fourth aspect of the present invention, by using the fixing sheet having the same unevenness as the uneven elastic deformation portion of the corrugation damper, the entire elastic deformation portion of the corrugation damper is fixed. The fixing of the elastically deforming portion becomes even stronger.

[0032]

BEST MODE FOR CARRYING OUT THE INVENTION First Embodiment Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 (a) is a plan view of a butterfly damper to which a fixing sheet used in the method for manufacturing a speaker of the present invention is attached, and FIG. 1 (b) shows a butterfly damper before the fixing sheet is attached. It is a top view. As shown in the figure, the butterfly damper 1
Reference numeral 0 denotes a ring-shaped inner peripheral frame 10a, a ring-shaped outer peripheral frame 10b provided outside the inner peripheral frame 10a, and an inner peripheral frame 1
A plurality of arm portions 10c connecting between 0a and the outer peripheral frame 10b and elastically deforming (corresponding to the arm-like elastically deforming portion in claims)
With.

Each of the arm portions 10c has an inner peripheral frame 10a.
Perimeter 10c1 along the outer periphery and the inner periphery of the outer peripheral frame 10b
And an inner peripheral connecting portion 10c2 connecting one end of the peripheral creeping portion 10c1 to the inner peripheral frame 10a, and an outer peripheral connecting portion 10c3 connecting the other end of the peripheral creeping portion 10c1 to the outer peripheral frame 10b. . Further, as shown in the figure, in the butterfly damper 10, the outer peripheral connecting portion 10c3 of the other arm portion 10c is arranged next to the inner peripheral connecting portion 10c2 of the one arm portion 10c.

The butterfly damper 10 has an inner peripheral connecting portion 10c2 of one arm portion 10c and an inner peripheral connecting portion 1 thereof.
0c2 and the outer peripheral connecting portion 10 of the other arm portion 10c adjacent to
The fixing sheet 20 is releasably attached with a material such as a double-sided tape so as to cover both c3 and c3. The fixed sheet 20 is formed of a hard material that does not deform even when a force is applied.

As described above, by sticking the rigid fixing sheet 20 to the arm portion 10c, the arm portion 10c can be fixed so as not to be elastically deformed even when a force is applied. Further, as shown in FIG. 1, the fixing sheet 20 is divided into two or more pieces and attached, so that the fixing sheet 20 can be easily peeled off.

Next, a method of manufacturing a speaker using the butterfly damper with a fixing member having the above-described structure will be described with reference to FIGS.
This will be described with reference to. In this figure, the same parts as those of the conventional speaker described above with reference to FIGS. 6 to 8 are designated by the same reference numerals, and detailed description thereof will be omitted. First, as shown in FIG. 2, a frame 112 is attached to a magnetic circuit 107 composed of a magnet 104, a plate 105 and a pole yoke 106 to form a frame ASSY. Next, the butterfly damper 1 to which the fixing sheet 20 is attached
0 is placed at a predetermined position on the frame ASSY.

Then, as in the conventional case described above, the coil gauge 114 fitted with the voice coil bobbin 103 and the voice coil 102 is inserted into the inner peripheral frame 10a of the butterfly damper 10 and then fitted to the central plate 105. Put them together.
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 coming into contact with the pole yoke 106 and the plate 105, and positioned with respect to the pole yoke 106 and the plate 105.

Next, the inner peripheral frame 10a and the outer peripheral frame 10b of the butterfly damper 10 are fixed to the voice coil bobbin 103 and the frame ASSY with an adhesive, respectively. This is the end of the first step in the claims. Then, the coil gauge 11
4 is pulled out from the voice coil bobbin 103.

After that, as shown in FIG.
08 is attached and the center cap 1
The diaphragm 101 integrally formed with the frame 13 is attached to the frame ASS.
It is placed from above Y and positioned with respect to the voice coil 102. Then, using an adhesive or the like, the edge 10
The outer peripheral portion of 8 is attached and fixed to the frame ASSY, and the inner peripheral portion of the diaphragm 101 (center cap 1
13) is attached to the voice coil bobbin 103 and fixed. This is the end of the second step in the claims.

At this time, the fixing sheet 20 fixes the arm portion 10c in the butterfly damper 10 so as not to elastically deform. As a result, since the movement of the voice coil bobbin 103 is restricted, the voice coil 102 and the diaphragm 101 are not displaced during the fixing work of the diaphragm 101.
Then, after the fixing sheet 20 is peeled off from the window provided on the frame 112 (corresponding to the third step in the claims), the lead wires 111 connected to both ends of the voice coil 102 are provided on the frame 112 in advance. The speaker is formed by soldering to 110. The frame 112
If the lead wire 111 interferes with the removal of the fixing member 20 from the window provided in, the lead wire may be soldered to the terminal 110 after the first step.

In the first embodiment described above, the fixing sheet 20 is attached so as to cover the inner peripheral connecting portion 10c2 and the outer peripheral connecting portion 10c3. However, for example, only the peripheral creeping portion 10c1 in the arm portion 10c is covered. The fixing sheet 20 may be attached to the.

However, when the fixing sheet 20 is attached so as to cover only the peripheral portion 10c1, the arm portion 10c on the inner peripheral connecting portion 10c2 side of the fixing sheet 20 moves to some extent when downward force is applied, so that the above description is given. So that the inner connecting portion 10
The fixation can be made stronger by sticking the fixing sheet 20 so as to cover both c2 and the outer peripheral connecting portion 10c3.

Second Embodiment Further, in the above-described first embodiment, the butterfly damper is used as the damper, and the fixing sheet 20 is attached to the butterfly damper. However, as shown in FIG. 4, the inner peripheral frame 10a-
It is also conceivable that the fixing sheet 20 is attached to a corrugation damper having corrugation portions 10d (corresponding to elastically deforming portions in the claims) provided in an uneven shape between the outer peripheral frames 10b. Also in this case, by sticking the hard fixing sheet 20 to the corrugation portion 10d, it is possible to fix the corrugation portion 10d so as not to be elastically deformed even when a force is applied.

Further, as the fixed sheet 20, FIG.
As shown in the A-A sectional view of FIG.
By using the same unevenness as the above, the contact area between the corrugation portion 10d and the fixing sheet 20 can be increased, and the corrugation portion 10d can be fixed more firmly.

In the first embodiment, the butterfly damper is used as the damper. However, in the present invention, the shape of the arm portion that connects the outer peripheral frame and the inner peripheral frame is not limited to the above-mentioned butterfly damper, and for example, the arm portion as shown in FIG. It can also be applied to existing dampers. In the case of this spiral damper, for example, as shown in FIGS. 5B and 5C, the fixing sheet 20 is attached and fixed so as to cover the outer peripheral frame 10b and the arm portion 10c.

[0046]

As described above, according to the first aspect of the invention, even if the work of fixing the diaphragm to the voice coil and the frame is performed with the gauge removed, the elasticity of the damper is fixed by the fixed sheet. Since the deformation part is fixed so that it does not deform, the elastic deformation part of the damper deforms during the fixing work, causing the voice coil bobbin to move. Since it is not impossible to fix the speaker, it is possible to obtain a speaker manufacturing method that can easily manufacture a speaker including a center cap-integrated diaphragm.

According to the second aspect of the present invention, the fixing sheet includes the inner peripheral connecting portion of one arm-like elastically deforming portion and the outer peripheral connecting portion of the other arm-like elastically deforming portion provided adjacently. By sticking so as to cover both, both ends of the peripheral portion are fixed, so that the elastic deformation portion is fixed more firmly, so that a method of manufacturing a speaker in which positional displacement is less likely to occur can be obtained.

According to the third aspect of the invention, the outer peripheral frame can be formed by connecting the inner peripheral connecting portion of one arm portion and the outer peripheral connecting portion of the other arm portion provided next to each other by the fixing member. Since the fixing of the arm portion to the is further strengthened, it is possible to obtain the method for manufacturing the speaker in which the positional deviation is further suppressed.

According to the fourth aspect of the present invention, by using the fixing sheet having the same unevenness as the uneven elastic deformation portion of the corrugation damper, the entire elastic deformation portion of the corrugation damper is fixed. Since the elastically deformable portion is fixed more firmly, it is possible to obtain a method of manufacturing a speaker in which positional displacement is less likely to occur.

[Brief description of drawings]

FIG. 1 (a) is a plan view of a butterfly damper to which a fixing sheet used in the method for manufacturing a speaker of the present invention is attached, and FIG. 1 (b) shows a butterfly damper before the fixing sheet is attached. It is a top view.

FIG. 2 is a drawing for explaining the manufacturing method of the speaker of the present invention.

FIG. 3 is a drawing for explaining the manufacturing method of the speaker of the present invention.

FIG. 4 is a diagram showing an embodiment of a corrugation damper to which a fixing sheet used in the method for manufacturing a speaker of the present invention is attached.

FIG. 5 is a plan view of a spiral damper.

FIG. 6 is a diagram showing an example of a conventional cone type speaker.

FIG. 7 is a diagram showing a method of manufacturing a conventional cone type speaker in the order of steps. (Pre-process of the process shown in FIG. 8)

FIG. 8 is a diagram showing a conventional method of manufacturing a cone type speaker in the order of steps.

[Explanation of symbols]

10a inner frame 10b peripheral frame 10c Arm part (arm-like elastic deformation part) Around 10c1 lap 10c2 Inner peripheral connection 10c3 Perimeter connection 10d Corrugation part (concave / convex elastic deformation part) 20 Fixed sheet 101 diaphragm 103 voice coil bobbin 107 Magnetic circuit 112 frames 113 Center cap 114 coil gauge (gauge)

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Masaru Ito             1105 Nikko Niigata, Tendo City, Yamagata Prefecture             Tohoku Pioneer Corporation F-term (reference) 5D012 AA05 BA06 BA08 BB01 CA07                       CA14 FA10 HA01 HA02

Claims (4)

[Claims] 1. A speaker including a damper having an inner peripheral portion to which a voice coil bobbin is fixed, an outer peripheral portion to which a frame is fixed, and an elastically deformable portion provided between the inner peripheral portion and the outer peripheral portion. A manufacturing method, wherein a fixing sheet for fixing the voice coil bobbin equipped with a gauge for positioning the voice coil bobbin with respect to a magnetic circuit so as not to elastically deform the elastically deformable portion is releasably attached. A first step of attaching the magnetic circuit through the inner peripheral portion of the damper, fixing the outer peripheral portion to the frame, and the inner peripheral portion to the voice coil bobbin, and after the first step, from the voice coil bobbin. After removing the gauge, a diaphragm having a center cap integrally formed to cover the voice coil bobbin is attached to the voice coil bobbin and the flap. A second step of fixing to the over arm, the rear second step, the manufacturing method of the speaker, characterized in that a third step of peeling the fixed sheet affixed to the damper. 2. The method for manufacturing a speaker according to claim 1, wherein the damper has an inner peripheral frame and an outer peripheral frame formed as the inner peripheral part and the outer peripheral part, respectively, and the elastically deformable part has an arm shape. In the damper, the arm-shaped elastically deformable portion includes a peripheral creeping portion, an inner peripheral connecting portion that connects one end of the peripheral creeping portion and the inner peripheral frame, and the other end of the peripheral creeping portion. An outer peripheral connecting portion that connects the outer peripheral frame, and the damper is provided with a plurality of the arm-shaped elastically deformable portions, and another one of the arm-shaped elastically deformable portions is provided next to the inner peripheral connecting portion. When using the arm-like elastically deformable portion provided with the outer peripheral connecting portion, the fixing sheet is provided with the inner peripheral connecting portion of the one arm-like elastically deforming portion and the other provided adjacent to the inner peripheral connecting portion. Attached so as to cover both the arm-shaped elastically deformable part and the outer peripheral connecting part. Method for producing a speaker which is characterized by using what is kicked. 3. The method of manufacturing a speaker according to claim 2, wherein the peripheral portion is along the outer periphery of the inner peripheral frame and the inner periphery of the outer peripheral frame. . 4. The method of manufacturing a speaker according to claim 1, wherein the damper is a corrugation damper in which the elastically deformable portion has a concave and convex shape, and the fixing sheet has the concave and convex elastically deformable portion. A method for manufacturing a speaker, wherein a speaker having the same unevenness is used.