WO2010016208A1

WO2010016208A1 - Speaker, and manufacturing method and manufacturing device therefor

Info

Publication number: WO2010016208A1
Application number: PCT/JP2009/003639
Authority: WO
Inventors: 矢野博; 榎本光高; 佐野浩司; 川邊昌志; 伊藤哲
Original assignee: パナソニック株式会社
Priority date: 2008-08-07
Filing date: 2009-07-31
Publication date: 2010-02-11

Abstract

A manufacturing device for a speaker is provided with a first to a third guide. A frame is guided by the first guide and mounted on the manufacturing device. A yoke is guided by the second guide, and the frame and the yoke are coupled. A plate to which a magnet is joined is guided by the second guide, and the magnet and the yoke are coupled. A voice coil is guided by the third guide and mounted on the manufacturing device. The voice coil and a diaphragm are coupled. The fame and the diaphragm are coupled. The frame, the yoke, the plate, the magnet, the voice coil, and the diaphragm are then extracted from the manufacturing device. By the above manufacturing method, the gap between the plate and the yoke of the speaker can be narrowed, the speaker can be manufactured with good yield, and the manufacturing cost can be reduced.

Description

Speaker, manufacturing method and manufacturing apparatus thereof

The present invention relates to a speaker used in various audio equipment and video equipment, a manufacturing method thereof, and a manufacturing apparatus thereof.

In recent years, with the demand for miniaturization and thinning of electronic devices such as mobile phones, there is an increasing demand for miniaturization and thinning of speakers mounted on such electronic devices. The speaker is generally difficult to assemble by a machine, and is performed manually by an operator who requires skill. As the speakers are reduced in size and thickness, the influence of component displacement due to manual work increases, and the yield decreases. In particular, it is necessary to narrow the gap between the plate and the yoke in order to compensate for the performance degradation due to the reduction in the size of the magnet that is a component of the speaker. When this gap is narrowed, the voice coil comes into contact with the plate and the yoke, and the yield of the speaker is lowered.

Patent Document 1 describes that a yield is improved by assembling a speaker with a jig.

¡Parts such as magnetic circuit parts and vibration parts are assembled using different jigs in different processes. Since the voice coil is inserted between the plate and the yoke without using a jig, it is difficult to narrow the gap between the voice coil and the plate or the gap between the voice coil and the yoke. is there. In addition, a speaker for molding these components requires a costly manufacturing apparatus such as a mold.

JP 2007-336145 A

The speaker manufacturing apparatus includes first to third guide portions. The frame is guided by the first guide portion and placed on the manufacturing apparatus. The yoke is guided by the second guide portion to couple the frame and the yoke. The plate to which the magnet is joined is guided by the second guide portion to couple the magnet and the yoke. The voice coil is guided by the third guide portion, and the voice coil is placed on the manufacturing apparatus. Connect the voice coil and the diaphragm. Connect the frame and the diaphragm. Thereafter, the frame, yoke, plate, magnet, voice coil, and diaphragm are extracted from the manufacturing apparatus.

This manufacturing method can narrow the gap between the speaker plate and the yoke, can manufacture the speaker with a good yield, and can reduce the manufacturing cost.

FIG. 1A is an exploded perspective view of a speaker according to Embodiment 1 of the present invention. 1B is a cross-sectional view of the speaker according to Embodiment 1. FIG. 2A is a rear view of the frame of the speaker according to Embodiment 1. FIG. 2B is a side view of the frame shown in FIG. 2A. FIG. 2C is a top view of the frame shown in FIG. 2A. FIG. 2D is a front view of the frame shown in FIG. 2A. FIG. 2E is a bottom view of the frame shown in FIG. 2A. 3A is a cross-sectional view of the frame shown in FIG. 2C taken along line 3A-3A. 3B is a cross-sectional view of the frame shown in FIG. 2C taken along line 3B-3B. 3C is a cross-sectional view of the frame shown in FIG. 2C taken along line 3C-3C. 4A is a top view of the yoke of the speaker according to Embodiment 1. FIG. 4B is a side view of the yoke shown in FIG. 4A. 4C is a front view of the yoke shown in FIG. 4A. FIG. 5A is a top view of the speaker plate according to Embodiment 1. FIG. FIG. 5B is a side view of the plate shown in FIG. 5A. FIG. 5C is a front view of the plate shown in FIG. 5A. 6A is a top view of the voice coil of the speaker according to Embodiment 1. FIG. 6B is a side view of the voice coil shown in FIG. 6A. 6C is a front view of the voice coil shown in FIG. 6A. FIG. 7 is a top view of the diaphragm of the speaker according to the first embodiment. 8A is a top view of the protector of the speaker according to Embodiment 1. FIG. FIG. 8B is a side view of the protector shown in FIG. 8A. FIG. 8C is a front view of the protector shown in FIG. 8A. 9A is a top view of the speaker manufacturing apparatus according to Embodiment 1. FIG. FIG. 9B is a side view of the manufacturing apparatus shown in FIG. 9A. FIG. 9C is a front view of the manufacturing apparatus shown in FIG. 9A. FIG. 10 is a top view of the manufacturing apparatus shown in FIG. 9A. FIG. 11 is an enlarged view of the manufacturing apparatus shown in FIG. 9A. FIG. 12 is a top view of the yoke of the speaker according to Embodiment 2 of the present invention. FIG. 13 is a top view of a speaker plate according to the second embodiment. FIG. 14A is a top view of the speaker manufacturing apparatus according to the second embodiment. 14B is a front view of the manufacturing apparatus shown in FIG. 14A. FIG. 15 is an exploded perspective view of the speaker according to the third embodiment. 16A is a top view of the manufacturing apparatus shown in FIG. 16B is a side view of the manufacturing apparatus shown in FIG. 16C is a front view of the manufacturing apparatus shown in FIG. FIG. 17 is an enlarged view of the manufacturing apparatus shown in FIG. 16A. 18 is an enlarged view of the manufacturing apparatus shown in FIG. 16A.

(Embodiment 1)
FIG. 1A is an exploded perspective view of a speaker 1 according to Embodiment 1 of the present invention. FIG. 1B is a cross-sectional view of the main part of the speaker 1. The speaker 1 includes a frame 2, a yoke 3, a magnet 4, a plate 5, a voice coil 6, a diaphragm 7, and a protector 8. The yoke 3 is mounted in the frame 2. The lower surface of the magnet 4 is bonded onto the yoke 3, and the lower surface of the plate 5 is bonded to the upper surface of the magnet 4. A magnetic gap 301 A is formed between the end portion 205 C of the plate 5 and the side wall 32 A of the yoke 3. Further, a magnetic gap 301B is formed between the end portion 205D of the plate 5 and the side wall 32B of the yoke 3. The voice coil 6 is disposed in the

magnetic gaps

301A and 301B. A magnetic circuit 1 A is formed by the yoke 3, the magnet 4 and the plate 5.

A jig 10 that is a manufacturing apparatus for manufacturing the speaker 1 includes a pedestal 100 A having a mounting surface 100 and mounting

portions

11 and 12 provided on the mounting surface 100. Each component of the speaker 1 is guided by the mounting

portions

11 and 12. The speaker 1 is elongated in the longitudinal direction 1B.

Next, each component of the speaker 1 will be described.

2A, 2B, 2C, 2D, and 2E are a rear view, a side view, a top view, a front view, and a bottom view of the frame 2, respectively. The side view of the opposite side of the frame 2 shown in FIG. 2B is the same as FIG. 2B. 3A is a cross-sectional view of the frame 2 taken along line 3A-3A shown in FIG. 2C. 3B is a cross-sectional view taken along line 3B-3B of frame 2 shown in FIG. 2C. 3B is a cross-sectional view taken along line 3C-3C of frame 2 shown in FIG. 2C.

The frame 2 is made of resin and has a substantially rectangular parallelepiped shape as shown in FIGS. 2A to 2E. As shown in FIG. 2C, the outer surface 23 of the frame 2 has

portions

23A and 23B in the longitudinal direction 1B and

portions

23C and 23D perpendicular to the longitudinal direction 1B. When viewed from the top, the

portions

23C and 23D of the outer surface 23 are shorter than the

portions

23A and 23B. Therefore, the frame 2 has a rectangular shape having a long side composed of the

portions

23A and 23B and a short side composed of the

portions

23C and 23D. .

2C and 2E, an opening 212A is provided at the center of the frame 2. The frame 2 has an inner surface 21 facing the opening 212A. The inner side surface 21 of the frame 2 includes

end portions

22A and 22B that are located on opposite sides in the longitudinal direction 1B, and

portions

21A and 21B that extend in the longitudinal direction 1A and face each other. The

end portions

22A and 22B of the inner surface 21 are positioned along the

portions

23A and 23B of the outer surface 23, respectively, and are guided by the mounting

portions

11 and 12 of the jig 10, respectively.

The frame 2 has

lock claws

24A and 24B provided on the

portions

23A and 23B of the outer surface 23, respectively, as shown in FIGS. 2A and 2D.

As shown in FIG. 2C, the frame 2 has

lock portions

25A and 25B provided on the

portions

21A and 21B of the inner surface 21, respectively. As shown in FIG. 3A, the lock portion 25A has

lock claws

26A and 26B. The lock portion 25A has a locking portion 28A provided at the tip of the lock claw 26A and a locking portion 28B provided at the tip of the lock claw 26B. Similarly, as shown in FIG. 3C, the lock portion 25B includes

lock claws

26C and 26D, and locking

portions

28C and 28D provided at the tips of the

lock claws

26C and 26D, respectively.

Further, as shown in FIG. 3B, projecting

portions

27A and 27B project from the bottom surface 222B of the inner surface 21 of the frame 2 toward the center of the frame 2, respectively. The locking portions 28 A, 28 B, 28 C, 28 D protrude toward the center of the frame 2 from the inner surface 21 of the frame 2. The frame 2 has a mounting portion 29 having a track shape provided between the outer surface 23 and the inner surface 21.

4A, 4B, and 4C are a top view, a side view, and a front view of the yoke 3, respectively. The yoke 3 is made of a magnetic material such as iron. As shown in FIG. 4B, the yoke 3 has a bottom plate 203 having an upper surface 203A and a lower surface 203B. As shown in FIG. 4A, when viewed from above, the bottom plate 203 has

end portions

203C and 203D extending in the longitudinal direction 1B and

end portions

203E and 203F extending at right angles to the longitudinal direction 1B. The

end portions

203C and 203D are longer than the

end portions

203E and 203F. As described above, the bottom plate 203 has a substantially rectangular shape having a long side composed of the

end portions

203C and 203D and a short side composed of the

end portions

203E and 203F when viewed from above.

The yoke 3 has a guide body portion 31 that protrudes from the

end portions

203E and 203F of the bottom plate 203, as shown in FIG. 4A. The guide body portion 31 has

convex portions

31A and 31B protruding from the

end portions

203E and 203F, respectively.

As shown in FIG. 4B, the yoke 3 includes a side wall 32A extending upward from the

end portions

203C and 203D of the bottom plate 203, and a side wall 32B provided on the front side portion of the long side portion.

As shown in FIG. 4B, the yoke 3 is provided with a recess 33 surrounded by the upper surface 203A of the bottom plate 203 and the

side walls

32A and 32B. A recess 34 is provided on the upper surface 203 A of the bottom plate 203, that is, on the bottom surface of the recess 33. As shown in FIG. 4B,

step portions

35A and 35B are provided at portions of the lower surface 203B of the bottom plate 203 facing the

side walls

32A and 32B, respectively.

The magnet 4 has a rectangular parallelepiped shape that is elongated in the longitudinal direction 1B, as shown in FIG. 1A. The upper surface and the lower surface of the magnet 4 have a substantially rectangular shape that is elongated in the longitudinal direction.

5A, 5B, and 5C are a top view, a side view, and a front view of the plate 5, respectively. The plate 5 has a substantially rectangular parallelepiped shape extending elongated in the longitudinal direction 1B. As shown in FIGS. 5A and 5C, the plate 5 has ends 205C and 205D that are elongated in the longitudinal direction 1B, and ends 205E and 205F that extend perpendicular to the longitudinal direction 1B and are shorter than the

ends

205C and 205D. A substrate 205 is provided. As described above, the plate 5, that is, the substrate 205 has a rectangular shape having a long side formed by the

end portions

205C and 205D and a short side formed by the end portions 205E and 105F. The upper surface 205A and the lower surface 205B of the plate 5, that is, the substrate 205 have a rectangular shape. The lower surface 205B of the plate 5 and the upper surface of the magnet 4 have substantially the same rectangular shape.

As shown in FIG. 5A, the plate 5 has a guide body portion 51 protruding from the

end portions

205E and 205F. The guide body 51 has

convex portions

51A and 51B that protrude from the

end portions

205E and 205F, respectively. When viewed from the top, the convex portion 51 A has the same shape as the convex portion 31 A of the yoke 3. Similarly, the protrusion 51B has the same shape as the protrusion 31B of the yoke 3 when viewed from above. The spacing between the

convex portions

51A and 51B is the same as the spacing between the

convex portions

31A and 31B of the yoke 3. As shown in FIG. 1B, the end portion 205C of the plate 5 faces the side wall 32A of the yoke 3 via the magnetic gap 301A, and the end portion 205D faces the side wall 32B of the yoke 3 via the magnetic gap 301B. Yes.

6A, 6B, and 6C are a top view, a side view, and a front view of the voice coil 6, respectively. The voice coil 6 is composed of a single conducting wire wound so as to form a gap 61 at the center. As shown in FIG. 6A, the voice coil 6 has a track shape that is elongated in the longitudinal direction 1B when viewed from above. That is, the track shape of the voice coil 6 includes linear

straight portions

62A and 62B extending in the longitudinal direction 1B and

curved end portions

63A and 63B connecting the

linear portions

62A and 62B. As shown in FIG. 6C, the voice coil 6 has a height t1 from the lower surface 6B to the upper surface 6A.

FIG. 7 is a top view of the diaphragm 7. The diaphragm 7 has a track shape that is elongated in the longitudinal direction 1B. The outer peripheral portion 71 of the diaphragm 7 has the same track shape as the track shape of the mounting portion 29 of the frame 2. The diaphragm 7 has an inner peripheral portion 72 having the same track shape as that of the voice coil 6.

8A, 8B, and 8C are a top view, a side view, and a front view of the protector 8, respectively. The protector 8 has a top plate 208 that is elongated in the longitudinal direction 1B. As shown in FIG. 8A, the top plate 208 has

end portions

208C and 208D having linear shapes extending in the longitudinal direction 1B and

end portions

208E and 208F having curved shapes connected to the

end portions

208C and 208D, as shown in FIG. 8A. It consists of. An outer peripheral portion 208 G of the top plate 208 of the protector 8 has substantially the same track shape as the outer peripheral portion 71 of the diaphragm 7. As shown in FIGS. 8B and 8C, the protector 8 has

side walls

218A and 218B extending downward from the

ends

208C and 208D, respectively. The protector 8 includes

lock portions

81A and 81B provided on the

side walls

28A and 218B, respectively. The lock portion 81A is provided with a hole 181A in which the lock claw 24A of the frame 2 is hooked. Further, the lock portion 81B is provided with a hole 181B in which the lock claw 24B of the frame 2 is hooked. The protector 8 covers the diaphragm 7 and protects the diaphragm 7.

9A, 9B, and 9C are a top view, a side view, and a front view of a jig 10 that is a manufacturing apparatus for manufacturing the speaker 1, respectively.

9A to 9C, the jig 10 includes a pedestal 100A having a mounting surface 100 that is a plane, and guide

portions

101, 102, and 103.

The guide unit 101 will be described. The guide part 101 has convex parts 101 A and 101 B that protrude upward from the placement surface 100. The

convex portions

101A and 101B have outer

peripheral portions

101L and 101M that are in contact with the placement surface 100, respectively. The outer

peripheral portions

101L and 101M have

portions

101N and 101P that face each other.

FIG. 10 is an enlarged top view of the mounting portion 11. The outer peripheral portion 101L of the convex portion 101A includes a portion 101N facing the convex portion 101B and a portion 101C. A portion 101C of the outer peripheral portion 101L includes a portion 101D on the opposite side of the portion 101N, and

portions

101E and 101F on the opposite side connected to the

portions

101C and 101L. The

portions

101E and 101F extend along the longitudinal direction 1B. A portion 101C of the outer peripheral portion 101L of the convex portion 101A has the same shape as the shape of the end portion 22A of the inner surface 21 of the frame 2.

FIG. 11 is an enlarged top view of the mounting portion 12. The outer peripheral portion 101M of the convex portion 101B is composed of a portion 101P facing the convex portion 101A and a portion 101G. A portion 101G of the outer peripheral portion 101M includes a portion 101H on the opposite side of the portion 101P and

portions

101J and 101K on the opposite sides connected to the

portions

101H and 101P. The

portions

101J and 101K extend in the longitudinal direction 1B. A portion 101G of the outer peripheral portion 101M of the convex portion 101B has the same shape as the end portion 22B of the inner side surface 21 of the frame 2.

The relationship between the

convex portions

101A and 101B and the frame 2 will be described. The distance L1 between the portion 101D of the outer peripheral portion 101L of the convex portion 101A and the portion 101H of the outer peripheral portion 101M of the convex portion 101B is the same as the length in the longitudinal direction 1B of the

portions

21A and 21B of the inner surface 21 of the frame 2. The length L2 of the portion 101D of the outer peripheral portion 101L of the convex portion 101A is the same as the length in the direction perpendicular to the longitudinal direction 1B of the portion 21C of the inner side surface 21 of the frame 2. In other words, the distance L2 between the

portions

101E and 101F of the outer peripheral portion 101L of the convex portion 101A is the same as the length in the direction perpendicular to the longitudinal direction 1B of the portion 21C of the inner surface 21 of the frame 2. Further, the length L2 of the portion 101H of the outer peripheral portion 101M of the convex portion 101B is the same as the length of the portion 21D of the inner side surface 21 of the frame 2. In other words, the distance L2 between the

portions

101J and 101K of the outer peripheral portion 101M of the convex portion 101B is the same as the length of the portion 21D of the inner surface 21 of the frame 2.

Next, the guide unit 102 will be described. The guide portion 102 includes a concave portion 102A provided in a portion 101N facing the convex portion 101B of the outer peripheral portion 101L of the convex portion 101A, and a concave portion provided in a portion 101P facing the convex portion 101A of the outer peripheral portion 101M of the convex portion 101B. 102B. The concave portion 102A has the same shape as the convex portion 31A provided in the yoke 3. The concave portion 102 B has the same shape as the convex portion 31 B provided on the yoke 3. The interval between the

recesses

102A and 102B is the same as the interval between the

projections

31A and 31B, and the same as the interval between the

projections

51A and 51B provided on the plate 5.

Next, the guide unit 103 will be described. The guide portion 103 includes a convex portion 103A that protrudes upward from the upper surface 601A of the convex portion 101A, and a convex portion 103B that protrudes upward from the upper surface 601B of the convex portion 101B. As shown in FIG. 9C, the convex portion 103A has a height t2 from the upper surface 601A of the convex portion 101A to the upper surface 603B of the convex portion 103A. Similarly, the convex portion 103B also has a height t2 from the upper surface 601B of the convex portion 101B to the upper surface 603B of the convex portion 103B. That is, the guide part 103 has a height t 2 from the upper surface of the guide part 101 to the upper surface of the guide part 103. The height t2 of the guide portion 103 is smaller than the height t1 of the voice coil 6.

As shown in FIG. 10, the convex portion 103 A has a curved portion 103 C having the same shape as the end portion 63 A of the voice coil 6. As shown in FIG. 11, the convex portion 103 B has a curved portion 103 D having the same shape as the end portion 63 B of the voice coil 6. The spacing between the

curved portions

103C and 103D of the

convex portions

103A and 103B is the same as the spacing between the

end portions

63A and 63B of the voice coil 6.

Next, a method for manufacturing the speaker 1 using the jig 10 which is a manufacturing apparatus will be described. A jig 10 which is a manufacturing apparatus having guide portions 101 to 103 is prepared.

First, the frame 2 is guided by the guide portion 101 configured by the convex portions 101 A and 101 B provided on the jig 10, and the frame 2 is placed on the placement surface 100 of the jig 10. That is, the end 22A of the inner surface 21 of the frame 2 is fitted into the portion 101C of the outer peripheral portion 101L of the convex portion 101A from above, and is guided and moved to the placement surface 100 along the convex portion 101A. At the same time, the end portion 22B of the inner surface 21 of the frame 2 is fitted from above into the portion 101G of the outer peripheral portion 101M of the convex portion 101B, and is guided and moved to the placement surface 100 along the convex portion 101B.

Next, the yoke 3 is guided by the guide portion 102 constituted by the recesses 102 A and 102 B provided in the jig 10, and the yoke 3 is coupled to the frame 2. In this step, an adhesive is first applied to the stepped

portions

35A and 35B of the yoke 3. The convex portion 31A of the yoke 3 is fitted into the concave portion 102A from above, and is guided and moved downward along the concave portion 102A. At the same time, the convex portion 31B of the yoke 3 is fitted into the concave portion 102B from above, and is guided and moved downward along the concave portion 102B. Thereafter, the stepped

portions

35A and 35B of the yoke 3 and the projecting

portions

27A and 27B of the frame 2 are joined by the adhesive applied to the stepped

portions

35A and 35B. At this time, the

lock portions

25A and 25B of the frame 2 press the outer surfaces of the

side walls

32A and 32B of the yoke 3 toward the opening 212A of the frame 2, respectively. The locking portions 28 A and 28 B are in contact with the upper surface of the side wall 32 A of the yoke 3 to lock the yoke 3. Similarly, the locking portions 28 C and 28 D are in contact with the upper surface of the side wall 32 B of the yoke 3 to lock the yoke 3. Thereby, it is possible to prevent the yoke 3 from being displaced with respect to the frame 2 until the adhesive is dried.

Next, the plate 5 to which the magnet 4 is coupled is guided by the guide portion 102 provided in the jig 10, and the magnet 4 and the yoke 3 are coupled. In this step, first, the upper surface of the magnet 4 and the bottom surface of the plate 5 are bonded and fixed by an adhesive. An adhesive is applied to the lower surface of the magnet 4. Thereafter, in a state where the magnet 4 is positioned below the plate 5, the convex portion 51A of the plate 5 is fitted into the concave portion 102A from above and guided and moved downward along the concave portion 102A. 51B is fitted into the recess 102B from above and guided and moved downward along the recess 102B. Then, the lower surface of the magnet 4 is fitted and joined in the recess 34 of the yoke 3 and is fixed by an adhesive. As described above, since the plate 5 and the yoke 3 joined to the magnet 4 are both guided by the guide portion 102, the distance between the magnetic gap 301 A between the side wall 32 A of the yoke 3 and the plate 5, and the side wall of the yoke 3. A magnetic circuit 1A in which the gap of the magnetic gap 301B between 32B and the plate 5 is always kept constant can be manufactured.

Next, the voice coil 6 is guided by the guide portion 103 constituted by the

convex portions

103A and 103B provided on the jig 10, and placed on the

upper surfaces

601A and 601B of the guide portion 101. In this step, the end portion 63A of the voice coil 6 is fitted into the convex portion 103A from above so that the curved portion 103C of the convex portion 103A and the inner surface of the end portion 63A of the voice coil 6 are in contact with each other along the convex portion 103A. Guided downward and moved. At the same time, the end portion 63B of the voice coil 6 is fitted into the convex portion 103B from above so that the curved portion 103D of the convex portion 103B and the inner surface of the end portion 63B of the voice coil 6 are in contact with each other, and downward along the convex portion 103B. Guided and moved. Then, the lower surfaces of the

end portions

63A and 63B of the voice coil 6 are placed on the upper surfaces of the

convex portions

101A and 101B. Since the height t1 of the voice coil 6 is larger than the height t2 from the

upper surfaces

601A and 601B of the guide portion 101 to the

upper surfaces

603A and 603B of the guide portion 103, the voice coil 6 is the upper surface of the

convex portions

103A and 103B of the guide portion 103. Projects upward from 603A and 603B.

By this process, the inner surface of the voice coil 6 is guided by the jig 10 that guides the yoke 3 and the plate 5, so that the conventional manufacturing is performed by combining the voice coil 6, the yoke 3, and the plate 5 without using the jig. Compared with the method, the distance between the inner surface of the voice coil 6 and the plate 5 can be made uniform, and the quality can be improved. Further, the distance between the inner surface of the voice coil 6 and the plate 5 can be narrowed compared to the conventional manufacturing method, and the magnetic flux density of the

magnetic gaps

301A and 301B can be increased, so that the performance of the speaker 1 is improved. Can do.

Next, the diaphragm 7 is coupled to the frame 2 and the voice coil 6. In this step, first, an adhesive is applied to the lower surface of the placement portion 29 of the frame 2 and the inner peripheral portion 72 of the diaphragm 7. The mounting portion 29 of the frame 2 and the lower surface of the outer peripheral portion 71 of the diaphragm 7 are joined and fixed by an adhesive, and at the same time, the upper surface 6A of the voice coil 6 and the lower surface of the inner peripheral portion 72 of the diaphragm 7 are fixed. Are bonded and fixed by an adhesive.

Next, the protector 8 is coupled to the frame 2. In this step, the

lock claws

24A and 24B of the frame 2 are respectively hooked on the

lock portions

81A and 81B of the protector 8, whereby the protector 8 is attached to the frame 2. Furthermore, the frame 2 and the protector 8 are joined and fixed by an adhesive, and the speaker 1 is completed. Thereafter, the speaker 1 is extracted from the jig 1.

As described above, the

magnetic gaps

301A and 301B between the plate 5 and the yoke 3 can be narrowed to improve the performance of the speaker 1, and the positional deviation can be prevented to improve the yield of the speaker 1, thereby reducing the manufacturing cost. Further, since the speaker 1 can be manufactured by fitting each component from above, there are few unnecessary processes, the manufacturing process can be automated, and the manufacturing cost can be further reduced. Further, since the process of molding the frame 2 and the yoke 3 is not necessary, the manufacturing cost of the speaker 1 can be further reduced.

In the above-described manufacturing method, the voice coil 6 is guided by the guide portion 103 of the jig 10, the voice coil 6 is placed on the upper surfaces 601 A and 601 B of the guide portion 101, and then the upper surface 6 A of the voice coil 6 and the diaphragm 7. The lower surface of the inner peripheral portion 72 is joined and fixed by an adhesive.

In the first embodiment, the voice coil 6 is guided by the guide portion 103 of the jig 10 after the lower surface of the inner peripheral portion 72 of the diaphragm 7 is bonded and fixed to the upper surface 6A of the voice coil 6 with an adhesive. The voice coil 6 may be placed on the

upper surfaces

601A and 601B of the guide portion 101. In this case, an adhesive is applied to the placement portion 29 of the frame 2 before the voice coil 6 is placed on the

upper surfaces

601A and 601B of the guide portion 101, and the voice coil 6 is attached to the

upper surfaces

601A and 601B of the guide portion 101. When mounted on the frame 2, the mounting portion 29 of the frame 2 and the lower surface of the outer peripheral portion 71 of the diaphragm 7 are joined and fixed by an adhesive. This process is suitable for manufacturing the speaker 1 in which the voice coil 6 vibrates with a large amplitude.

The jig 10 that is the manufacturing apparatus of the speaker 1 according to the first embodiment has the mounting portion 11 in which the

convex portions

101A and 103A and the concave portion 102A are integrally formed, and the

convex portions

101B and 103B and the concave portion 102B are integrally formed. The mounting part 12 is provided. The

guide portions

101, 102, and 103 may be provided on the jig 10 as separate members. In this case, the U-shaped convex portions that form the concave portions 102 A and 102 B of the guide portion 102 protrude from the placement surface 100. Further, a new placement portion protrudes from the placement surface 100 to the

projections

103A and 103B, and the height from the upper surface of the new placement portion to the projection 103A, and the projection 103B from the upper surface of the new placement portion. Is the same height t3.

In Embodiment 1, the guide part 102 is comprised by the recessed

parts

102A and 102B. The

convex portions

31A and 31B provided on the yoke 3 and the

convex portions

51A and 51B provided on the plate 5 are guided by the

concave portions

102A and 102B of the guide portion 102. The yoke 3 and the plate 5 may be guided by separate guide portions.

(Embodiment 2)
FIG. 12 is a top view of the yoke 703 of the speaker according to the second embodiment. FIG. 13 is a top view of the speaker plate 705 according to the second embodiment. 14A and 14B are a top view and a front view of a jig 710 which is a speaker manufacturing apparatus according to Embodiment 2. FIG. 12B, the same reference numerals are assigned to the same parts as those of the speaker 1 and the jig 10 shown in FIGS. As shown in FIGS. 14A and 14B, the jig 710 according to the second embodiment includes an attachment portion 711 provided on the placement surface 100 instead of the

attachment portions

11 and 12 of the jig 10 according to the first embodiment. 712 and a guide portion 702 instead of the guide portion 102 of the jig 10 according to the first embodiment. The guide portion 702 according to the second embodiment has

convex portions

702A and 702B instead of the

concave portions

102A and 102B of the guide portion 102 according to the first embodiment. The convex portion 702A protrudes from the portion 101N facing the mounting portion 712 of the outer peripheral portion 101L of the mounting portion 711 toward the mounting portion 702B. The convex portion 702B protrudes from the portion 101P facing the attachment portion 711 of the outer peripheral portion 101M of the attachment portion 712 toward the attachment portion 711. As shown in FIG. 12, the

end portions

203E and 203F of the bottom plate 203 of the yoke 73 are provided with

recesses

731A and 731B, respectively. As shown in FIG. 13, recesses 751 A and 751 B are provided at end portions 205 E and 205 F of the plate 705, respectively. The concave portion 731A of the yoke 703 and the concave portion 751A of the plate 705 are guided by the convex portion 702A of the guide portion 702. At the same time, the concave portion 731B of the yoke 703 and the concave portion 751B of the plate 705 are guided by the convex portion 702B of the guide portion 702.

(Embodiment 3)
FIG. 15 is an exploded perspective view of the speaker 1 according to the third embodiment of the present invention. 15, the same reference numerals are assigned to the same parts as those of the speaker 1 according to the first embodiment shown in FIGS. 1A to 11. The speaker 1 shown in FIG. 15 is manufactured by a jig 10A which is a manufacturing apparatus instead of the jig 10 which is the manufacturing apparatus shown in FIG. 1A. The jig 10A includes mounting

parts

11A and 12A provided on the mounting surface 100 of the base 100A, instead of the mounting

parts

11 and 12 of the jig 10 which is the manufacturing apparatus shown in FIG. 1A. 16A, 16B, and 16C are a top view, a side view, and a front view, respectively, of a jig 10A that is a manufacturing apparatus for manufacturing the speaker 1. FIG. FIG. 17 is a top view of the attachment portion 11A. FIG. 18 is a top view of the mounting portion 12A. 16A to 18, the same reference numerals are assigned to the same portions as those of the jig 10 that is the manufacturing apparatus according to the first embodiment shown in FIGS. 9 to 11. The jig 10A includes a guide portion 803 instead of the guide portion 103 of the jig 10 shown in FIG. 11 A of attachment parts have the

convex parts

803G and 803H which protrude from the upper surface 601A of the convex part 101A instead of the convex part 103A of the attachment part 11 by Embodiment 1. FIG. The concave portion 102A is located between the

convex portions

803G and 803H. The

convex portions

803G and 803H have

curved portions

103G and 103H having shapes that coincide with the inner surface of the end portion 63A of the voice coil 6, respectively. 12 A of attachment parts have the

convex parts

803J and 803K which protrude from the upper surface 601B of the convex part 101B instead of the convex part 103B of the attachment part 12 by Embodiment 1. FIG. The concave portion 102B is located between the

convex portions

803J and 803K. The

convex portions

803J and 803K have

curved portions

103J and 103K having shapes that coincide with the inner surface of the end portion 63B of the voice coil 6, respectively.

With the manufacturing method according to the present invention, the gap between the speaker plate and the yoke can be narrowed, the speaker can be manufactured with a good yield, and the manufacturing cost can be reduced. Therefore, the speaker manufactured by this manufacturing method is useful as a speaker used for small acoustic devices such as mobile phones and electronic devices.

1 Speaker 2 Frame 3 Yoke 4 Magnet 5 Plate 6 Voice Coil 7 Diaphragm 8 Protector 10 Jig (Manufacturing Equipment)
31 Guide body (first guide body)

31A Convex part

31B Convex part 51 Guide body part (second guide body part)

51A Convex part

51B Convex part

81A Lock part

81B Lock part 101 Guide part (first guide part)
102 Guide part (second guide part)
102A Concave part 102B Concave part 103 Guide part (third guide part)
103E Convex part 103F Convex part 203 Bottom plate 205 Substrate

Claims

Preparing a manufacturing apparatus including a first guide portion, a second guide portion, and a third guide portion;
Placing the frame on the manufacturing apparatus with the frame guided by the first guide portion;
A yoke is guided by the second guide portion to couple the frame and the yoke;
A plate to which a magnet is joined is guided by the second guide portion to couple the magnet and the yoke;
Placing the voice coil on the manufacturing apparatus with the voice coil being guided by the third guide part;
Coupling the voice coil and the diaphragm;
Coupling the frame and the diaphragm;
After the step of coupling the frame and the yoke, the step of coupling the magnet and the yoke, and the step of coupling the frame and the diaphragm, the frame, the yoke, the plate, and the magnet Extracting the voice coil and the diaphragm from the manufacturing apparatus;
A method for manufacturing a speaker, comprising:
The speaker manufacturing method according to claim 1, wherein the step of coupling the voice coil and the diaphragm is performed between the steps of placing the voice coil on the manufacturing apparatus.
The speaker manufacturing method according to claim 1, wherein the step of coupling the voice coil and the diaphragm is performed between the step of coupling the frame and the diaphragm.
The frame has an opening;
The yoke has first guide body portions at both ends,
The plate has second guide body portions at both ends,
The step of placing the frame on the manufacturing apparatus includes the step of placing the frame on the manufacturing apparatus with an inner surface of the opening of the frame guided by the first guide portion,
The step of coupling the frame and the yoke includes the step of coupling the frame and the yoke by guiding the first guide body portion to the second guide portion,
The step of coupling the magnet and the yoke includes the step of coupling the magnet and the yoke by guiding the second guide body portion of the plate to the second guide portion,
2. The step of placing the voice coil on the manufacturing apparatus includes a step of placing the voice coil on the manufacturing apparatus with an inner surface of the voice coil guided by the third guide portion. The manufacturing method of the speaker of description.
The yoke further includes a bottom plate having a rectangular shape having a long side and a short side;
The first guide body portion of the yoke is provided at both ends of the bottom plate corresponding to the short side;
The plate further includes a rectangular substrate having a long side and a short side,
The speaker manufacturing method according to claim 4, wherein the second guide body portion of the plate is provided at both ends of the substrate corresponding to the short side.
The first guide part has two convex parts, and the second guide part has two concave parts,
The third guide portion has two convex portions,
The first guide body portion has two convex portions,
The speaker manufacturing method according to claim 4, wherein the second guide body portion has two convex portions.
The method for manufacturing a speaker according to claim 1, further comprising a step of coupling the frame and the protector so as to cover the diaphragm with a protector.
The speaker manufacturing method according to claim 1, wherein at least two of the first guide part, the second guide part, and the third guide part are integrally formed.
A manufacturing apparatus for manufacturing a speaker,
A first guide portion, a second guide portion, and a third guide portion;
The speaker is
A frame having an opening;
A yoke coupled to the inner surface of the frame;
A magnet coupled to the yoke;
A plate coupled to an upper surface of the magnet and forming a magnetic gap with the yoke;
A diaphragm coupled to the frame;
A voice coil coupled to the lower surface of the diaphragm and having a portion located within the magnetic gap;
With
The yoke has first guide body portions provided at both ends,
The plate has second guide body portions provided at both ends,
The first guide portion guides the frame and places the frame on the manufacturing apparatus,
The second guide portion guides the yoke to couple the frame and the yoke;
The second guide portion guides the plate to which the magnet is joined to couple the magnet and the yoke;
The third guide unit guides the voice coil, and places the voice coil on the manufacturing apparatus.
The frame has an opening;
The yoke has first guide body portions at both ends,
The plate has second guide body portions at both ends,
The first guide portion guides an inner surface of the opening of the frame and places the frame on the manufacturing apparatus,
The second guide part guides the first guide body part to couple the frame and the yoke;
The second guide portion guides the second guide body portion of the plate to couple the magnet and the yoke;
The manufacturing apparatus according to claim 9, wherein the third guide portion guides an inner surface of the voice coil to place the voice coil on the manufacturing apparatus.
The manufacturing apparatus according to claim 9, wherein at least two of the first guide portion, the second guide portion, and the third guide portion are integrally formed.
The first guide part has two convex parts,
The second guide portion has two recesses,
The manufacturing apparatus according to claim 9, wherein the third guide portion has two convex portions.
A frame having an opening;
A yoke coupled to the inner surface of the frame;
A magnet coupled to the yoke;
A plate coupled to an upper surface of the magnet and forming a magnetic gap with the yoke;
A diaphragm coupled to the frame;
A voice coil coupled to the lower surface of the diaphragm and having a portion located within the magnetic gap;
With
The yoke has first guide body portions provided at both ends,
The said plate has a 2nd guide body part provided in the both ends, The speaker.
The yoke further includes a bottom plate having a rectangular shape having a long side and a short side;
The first guide body portion of the yoke is provided at both ends of the bottom plate corresponding to the short side;
The plate further includes a rectangular substrate having a long side and a short side,
The speaker according to claim 13, wherein the second guide body portion of the plate is provided at both ends of the substrate corresponding to the short side.
The first guide body portion has two convex portions,
The speaker according to claim 13, wherein the second guide body portion has two convex portions.
The speaker according to claim 13, further comprising a protector coupled to the frame so as to cover the diaphragm.
The speaker according to claim 13, wherein the frame includes a lock portion that is provided on an inner surface and fixes the yoke.