JP3879755B2 - Speaker manufacturing method - Google Patents

Description

  The present invention relates to a method for manufacturing a speaker, and more particularly to a method for positioning a voice coil.

5A and 5B are cross-sectional views showing a manufacturing process of a speaker when a conventional general voice coil positioning jig is used. In the conventional manufacturing method, as shown in FIGS. 5A and 5B, a voice coil positioning jig called a voice coil holder 501 is a front side (magnetic circuit) of a magnetic circuit 508 including a top plate 508a, a permanent magnet 508b, and a pole piece 508c. 508 is inserted into the magnetic gap 507 from the frame 509 bonding surface side), and the voice coil bobbin 502 is vertically positioned and centered. After the voice coil bobbin 502, the diaphragm 504, the damper 505, and the like are bonded and fixed, the voice coil holder 501 is extracted on the front side of the magnetic circuit, and finally a center cap 506 is attached. According to this method, since the voice coil holder 501 needs to be pulled out in the front direction of the magnetic circuit, the center cap integrated diaphragm (that is, the diaphragm in which the diaphragm and the center cap are integrally formed), or the center cap, There is a problem that it cannot be adopted when manufacturing a speaker having a structure in which the diaphragm and the diaphragm are assembled in the previous process (the process before arranging the voice coil in the magnetic gap).

In order to solve this problem, there is a method in which a hole is defined in the bottom of the pole piece, a voice coil centering and vertical positioning jig is inserted into the hole from the back side of the magnetic circuit, and the voice coil is positioned. Proposed. Furthermore, a centering jig is set in advance on the top of the pole piece, the vibration system is inserted and bonded, and after drying, the centering jig is pushed up from the through hole defined in the magnetic circuit, and is placed on the inner periphery of the voice coil. A method of bonding and fixing has been proposed (for example, Patent Document 1). According to these methods, the center cap integrated diaphragm or the speaker having a structure in which the center cap and the diaphragm are assembled in the previous process can be employed. However, according to the former method, since the support area for the vertical positioning of the voice coil bobbin provided on the jig is small, it is unstable to support the voice coil bobbin. Furthermore, since the magnetic gap between the voice coil and the pole piece is about 0.2 mm, the portion necessary for centering provided in the jig is thin. Therefore, the part is easily deformed, and it is not easy to insert the jig at a desired position. Furthermore, when the jig is inserted and removed, the mechanical load on the voice coil is heavy at the fitting portion between the jig and the voice coil, and the jig fragment is broken or broken due to breakage. It has a problem that it remains in the area and causes a quality defect. Further, the latter assembling method has a problem that an unnecessary sound (for example, noise or distortion) is emitted because the centering jig is directly part of the diaphragm. For this reason, the jig must take into consideration the material and shape, but in reality, the material and shape do not have a degree of freedom of selection, and it is difficult to prevent unnecessary sounds from being emitted.

JP 61-232797

  The present invention has been made to solve the above-described conventional problems. The object of the present invention is a speaker using a center cap-integrated diaphragm, or a structure in which a center cap and a diaphragm are assembled in a previous process. It is an object of the present invention to provide a method for manufacturing a speaker that can easily and accurately position a voice coil, has high quality, and has excellent characteristics.

  The speaker manufacturing method of the present invention includes a step of disposing a voice coil positioning jig in the magnetic gap from the front side of the magnetic circuit, a step of disposing the voice coil in the magnetic gap, and the voice coil positioning jig. A step of positioning the voice coil, and a step of taking out the voice coil positioning jig to the back side of the magnetic circuit through a through hole defined in the magnetic circuit.

Since the voice coil positioning jig is disposed in the magnetic gap from the front side of the magnetic circuit, the voice coil and the voice coil positioning jig can be inserted into the magnetic gap very easily. This is because the voice coil and the voice coil positioning jig have the same insertion direction into the magnetic gap. Moreover, since the voice coil positioning jig is taken out from the back side of the magnetic circuit through the through hole defined in the magnetic circuit, the diaphragm integrated with the center cap or the diaphragm with the center cap bonded in the previous process is bonded. After that, the voice coil positioning jig can be taken out from the magnetic circuit. According to this method, the center cap and the diaphragm can be integrated by using the center cap-integrated diaphragm or the one in which the center cap and the diaphragm are bonded and assembled in the previous process. The strength of the part can be improved. Furthermore, it is possible to prevent noise, distortion, and the like that are generated when the cone split vibration is transmitted to the cap portion.

In a preferred embodiment, the voice coil positioning jig has a film part that defines the position of the voice coil, and in the step of arranging the voice coil positioning jig, the tip of the film part is in the magnetic gap. Inserted.

Since the film can be easily deformed, the voice coil positioning jig has a film part, so it can be easily inserted into the magnetic gap, removed from the magnetic gap, and taken out from the speaker through the through hole of the magnetic circuit. It becomes. Furthermore, for the same reason, it can be applied to assembling various speakers with one kind of jig, leading to a reduction in manufacturing cost. Furthermore, the voice coil positioning jig of the present invention can be used in place of the voice coil positioning jig used in the conventional assembling method, and its versatility is extremely high.

  In a preferred embodiment, the film portion of the voice coil positioning jig has a plurality of films stacked in the same direction, and the position of the voice coil is defined by the plurality of stacked films.

  When the voice coil positioning jig is inserted and removed, the film portion is in a curved state, and a load is applied to the film. As a result, the film may be damaged. However, by forming the film portion by superposing a plurality of films, the burden of deformation of the film during bending can be eliminated by the shift between the films, and the burden of deformation of the film can be reduced. As a result, the durability of the film is improved, and at the same time, the insertion and removal of the voice coil positioning jig becomes extremely easy.

In a preferred embodiment, the voice coil positioning jig has a support portion to which the film portion is attached, and is inserted into the magnetic gap in the step of taking out the voice coil positioning jig to the back side of the magnetic circuit. The film portion thus taken out is taken out to the back side of the magnetic circuit by taking out the support portion.

Since the voice coil positioning jig has the support part, the operator can take out the film part from the magnetic circuit very easily by picking the support part and taking it out from the magnetic circuit. In addition, even if the through-holes defined in the magnetic circuit are small and the film part is difficult to take out to the back side of the magnetic circuit, the film disposed in the magnetic gap by making the dimensions of the support part correspond to the magnetic circuit The part can be taken out by the support part.

The speaker manufacturing method of the present invention further includes a step of attaching a voice coil positioning jig to the gap gauge, a step of defining a magnetic gap by the gap gauge to which the voice coil positioning jig is attached, and forming a magnetic circuit; Removing the voice coil positioning jig from the gap gauge, removing the gap gauge from the magnetic circuit in a state where the voice coil positioning jig is disposed in the magnetic gap, and removing the voice coil from the magnetic gap. Placing the voice coil with the voice coil positioning jig, and placing the voice coil positioning jig on the back side of the magnetic circuit through a through hole defined in the magnetic circuit. A step of removing.

By attaching the film part of the voice coil positioning jig to the gap gauge, the spread of the film part can be fixed, so that the film part can be inserted into the magnetic gap very easily. In addition, since the step of defining the magnetic gap by the gap gauge and the step of inserting the voice coil positioning jig into the magnetic gap are made common, the manufacturing process becomes extremely easy.

In a preferred embodiment, the gap gauge has a notch groove portion and a claw portion, the voice coil positioning jig has a film portion that defines the position of the voice coil, and the voice gauge positioning jig is attached to the gap gauge. In the step of attaching the tool, the film part is inserted into the notch groove part, and the film part is engaged with the claw part by relatively rotating the gap gauge and the voice coil positioning jig.

By defining a notch groove and a claw inside the gap gauge, the film part of the voice coil positioning jig is inserted into the gap gauge along the notch groove, and is slid to the claw. By engaging, the voice coil positioning jig can be attached to the gap gauge. Therefore, even when the film is wrinkled (for example, curved) due to repeated use, the film portion can be engaged by the notch groove portion and the claw portion and can be disposed at a predetermined position. Furthermore, since the film part is protected by the notch groove part and the claw part, it is possible to prevent damage to the film part tip caused by contact with the magnetic circuit at the time of insertion into the magnetic gap.

According to another aspect of the present invention, a speaker is provided. The speaker includes a diaphragm, a center cap formed integrally with the diaphragm, a voice coil, and a voice coil positioning jig disposed in the magnetic gap from the front side of the magnetic circuit from the back side of the magnetic circuit. A pole piece having a through hole for taking out the magnetic circuit including a permanent magnet.

By making the voice coil positioning jig a speaker that can be taken out from the back side of the magnetic circuit, it is possible to manufacture a speaker with a structure that assembles the center cap integrated diaphragm or the center cap and diaphragm in the previous process. In addition, the strength of the diaphragm can be improved, and further, the occurrence of distortion and noise can be suppressed. Therefore, it is possible to provide a method for manufacturing a speaker having excellent characteristics, extremely easy to manufacture, and stable in quality.

According to the present invention, the voice coil positioning jig can be arranged from the front side of the magnetic circuit and can be taken out to the back side of the magnetic circuit through the through hole defined in the magnetic circuit. This makes it possible to manufacture a center cap integrated diaphragm, or a speaker with a structure in which the center cap and the diaphragm are assembled in the previous process, thereby improving the strength of the diaphragm and further suppressing distortion and noise. Therefore, it is possible to provide a speaker having excellent characteristics.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings, but the present invention is not limited to these embodiments.

1A to 1F are speaker cross-sectional views for explaining a method of assembling a speaker according to a preferred embodiment of the present invention. Here, the magnetic circuit 108 and the frame 106 can be assembled by a conventional general speaker manufacturing method. The vibration system includes a center cap-integrated diaphragm 101, a voice coil bobbin 102, a voice coil 103 wound around the voice coil bobbin 102, an edge 104, and a damper 105, which are assembled in advance in the previous process. . The center cap-integrated diaphragm 101 may be a diaphragm and a center cap assembled by bonding or the like in the previous step. First, as shown in FIG. 1A, the film portion 201 a of the voice coil positioning jig 201 is disposed in the magnetic gap 107 from the front side of the magnetic circuit 108. The magnetic circuit front portion referred to here indicates a side surface (that is, the side on which the diaphragm is attached) to which the frame 106 is bonded in the magnetic circuit 108.

2A and 2B are oblique views showing the voice coil positioning jig of the present embodiment. The voice coil positioning jig 201 has a film part 201a and a support part 201b. The film part 201a is for positioning the voice coil. The film portion 201a typically has one or a plurality of films formed in a strip shape (that is, an elongated rectangular shape) (in FIG. 2A, the film portion 201a has two films). The film portion 201a has a thickness that defines the distance between the pole piece 108c and the voice coil bobbin 102, and is typically 0.2 mm to 0.6 mm. Any appropriate material can be adopted as the material for forming the film, but typically, ABS, PP, PE and the like are used. The support part 201b is a part to which the film part 201a is attached, and is picked when the operator takes out the voice coil positioning jig 201 from the magnetic circuit 108 and pulled out to the back side of the magnetic circuit 108. The support part 201b is formed in a rod shape, and the film part 201a is fixed by a screw 201c at one end of the support part 201b, and radially in four directions around the fixing point (that is, the two films intersect). (See Fig. 2 (a)). Further, the thickness of the support portion 201b is such a dimension that it can be easily taken out from the through hole 108d in the magnetic circuit rear surface direction. Preferably, as shown in FIG.2 (b), as for the film part 201a, the film of multiple sheets (3 sheets in this example) is piled up in the same direction. The total thickness of the plurality of films defines the distance between the pole piece 108c and the voice coil bobbin 102. In other words, the voice coil is positioned by superimposing a plurality of films. By superimposing a plurality of films, the burden on the film due to deformation when the film is curved can be eliminated by displacement between the films. As a result, the durability of the film is improved and the insertion and removal of the voice coil positioning jig is extremely easy.

Next, as shown in FIGS. 1B and 1C, an adhesive is applied to the outer periphery of the edge 104 and the outer periphery of the damper 105, the entire vibration system is inserted into the frame from the front surface of the magnetic circuit, and the edge 104 and the damper 105 are Adhere to the frame 106. At the same time, the voice coil bobbin 102 around which the voice coil is wound is inserted into the magnetic gap 107, and the voice coil bobbin 102 is positioned at a predetermined position by the thickness of the film part 201a of the voice coil positioning jig 201. Furthermore, since the vibration system is assembled in advance, the entire vibration system is simultaneously disposed at a predetermined position. Further, the entire vibration system is supported by the edge 104 and the damper 105, whereby the vertical position of the voice coil bobbin 102 is automatically determined. Further, when the vibration system is heavy with a speaker having a large diameter and the vibration system cannot be sufficiently supported by the edge 104 and the damper 105, it is preferable to use a vertical positioning jig as appropriate.

Next, after the adhesive is dried, as shown in FIGS. 1D to 1F, the voice coil positioning jig 201 is placed on the back side of the magnetic circuit 108 (the pole piece of the magnetic circuit 108) through the through hole 108d defined in the magnetic circuit 108. 108c bonding surface side). Specifically, the support part 201b of the voice coil positioning jig 201 is once pushed into the front side of the magnetic circuit 108 to the extent that it does not hit the center cap integrated diaphragm 101, and the film of the voice coil positioning jig 201 is inserted from the magnetic gap 107. The part 201a is pulled out (FIG. 1D). Then, by pulling out the support portion 201b of the voice coil positioning jig 201 from the through hole 108d to the back side of the magnetic circuit 108, the film portion 201a attached to the support portion 201b is simultaneously passed through the through hole 108d. (FIGS. 1E and 1F). Therefore, after the voice coil positioning, the entire voice coil positioning jig 201 can be taken out from the back side of the magnetic circuit 108. According to this method, by using a jig having a structure that can be taken out from the through hole 108d to the back surface of the magnetic circuit, a center cap-integrated diaphragm or a speaker having a structure in which the center cap and the diaphragm are assembled in the previous process can be easily obtained. Can be manufactured.

  Next, another preferred embodiment of the present invention will be described with reference to FIGS. The description of the same parts as in the previous embodiment is omitted. In this example, the process of forming a magnetic circuit using a gap gauge and the process of inserting a voice coil positioning jig into the magnetic gap are shared. 3A is a perspective view showing the gap gauge 301, and FIG. 3B shows a state where the voice coil positioning jig 201 is attached to the gap gauge 301. FIG. The gap gauge 301 includes a ring portion 304 for defining the width of the magnetic gap 107, a flange portion 305, and a convex portion 306. A notch groove portion 302 and a claw portion 303 are provided inside the ring portion 304 of the gap gauge 301. By inserting the film part 201a into the notch groove part 302 and relatively rotating the gap gauge 301 and the voice coil positioning jig 201 (that is, sliding the film part 201a toward the claw part 303), the film part 102 is It has a structure that can be engaged with the claw portion 303.

First, the voice coil positioning jig 201 is attached to the gap gauge 301 as shown in FIG. Specifically, after inserting the film part 201a into the notch groove part 302, by rotating the support part 201b in the direction of the arrow X, the film part 201a is slid to the claw part 303 side and engaged with the claw part 303, The voice coil positioning jig 201 is attached to the gap gauge 301. As a result, the magnetic gap 107 is defined by the gap gauge 301, and at the same time, the voice coil positioning jig can be disposed in the magnetic gap 107.

Next, as shown in FIG. 4A, the magnetic circuit 108 is formed using the gap gauge 301 to which the voice coil positioning jig 201 is attached. Specifically, when the top plate 108a, the permanent magnet 108b and the pole piece 108c are bonded, a gap gauge 301 is inserted between the pole piece 108c and the top plate 108a from the front side of the magnetic circuit to define the magnetic gap.

Next, as shown in FIG. 4B, by removing the voice coil positioning jig 201 from the gap gauge 301, only the gap gauge 301 is connected to the magnetic circuit in a state where the voice coil positioning jig 201 is disposed in the magnetic gap 107. Remove from 108. Specifically, the gap gauge 301 is rotated in a direction in which the film part 201a is detached from the claw part 303 of the gap gauge 301 (in the direction opposite to the arrow X in FIG. 3B), and the voice coil positioning jig 201 is removed from the gap gauge 301. And pull out the gap gauge 301 toward the front surface of the magnetic circuit. As a result, the film portion 201a of the voice coil positioning jig 201 is placed at a predetermined position of the magnetic gap 107, and the voice coil can be positioned. Next, the frame 106 is bonded to the top plate 108a. The subsequent steps of the speaker manufacturing method are the same as in the above embodiment.

As mentioned above, although preferable embodiment of this invention was described, this invention is not limited to these embodiment. For example, the structure supporting lifting unit and the film is separated or support portion and the film portion are integrally formed of the same material structure or support portion and the film portion are two-color formation or insert formed by different material structure,,, In addition, any voice coil positioning jig having a structure that can be taken out to the back side of the magnetic circuit through a through hole defined in the magnetic circuit may be used. Furthermore, the film part of the voice coil positioning jig may be such that the width of the film part is continuously reduced from the fixed part of the film part to the tip of the film part. Furthermore, the film part of the voice coil positioning jig may be formed in a thread shape.

  The assembling method of the present invention can be used for manufacturing a speaker of any application and size. In particular, a speaker using a center cap-integrated diaphragm or a speaker having a structure in which a center cap and a diaphragm are assembled in a previous process is used. It can be suitably used for production.

It is speaker sectional drawing for demonstrating the manufacturing method of the speaker by preferable embodiment of this invention. It is speaker sectional drawing for demonstrating the manufacturing method of the speaker by preferable embodiment of this invention. It is speaker sectional drawing for demonstrating the manufacturing method of the speaker by preferable embodiment of this invention. It is speaker sectional drawing for demonstrating the manufacturing method of the speaker by preferable embodiment of this invention. It is speaker sectional drawing for demonstrating the manufacturing method of the speaker by preferable embodiment of this invention. It is speaker sectional drawing for demonstrating the manufacturing method of the speaker by preferable embodiment of this invention. It is a perspective view which shows the voice coil positioning jig | tool (b) which has the film part which piled up the voice coil positioning jig | tool (a) used in preferable embodiment of this invention, and a plurality of films. FIG. 6 is a perspective view showing a gap gauge (a) having a notch groove portion and a claw portion on the inner side and a state (b) in which a voice coil positioning jig is attached to the gap gauge used in another preferred embodiment of the present invention. is there. It is speaker sectional drawing for demonstrating the manufacturing method of the speaker by another preferable embodiment of this invention. It is speaker sectional drawing for demonstrating the manufacturing method of the speaker by another preferable embodiment of this invention. It is speaker sectional drawing which shows the manufacturing method of the conventional speaker. It is speaker sectional drawing which shows the manufacturing method of the conventional speaker.

Explanation of symbols

101 Center cap integrated diaphragm 102 Voice coil bobbin 103 Voice coil 104 Edge 105 Damper 106 Frame 107 Magnetic gap 108 Magnetic circuit 201 Voice coil positioning jig 201a Film part 201b Support part 301 Gap gauge 302 Notch groove part 303 Claw part

Claims (4)

A speaker manufacturing method for assembling a speaker using a voice coil positioning jig,
The voice coil positioning jig has a film part that defines the position of the voice coil in the magnetic gap, and a support part to which the film part is attached,
A first coil coil positioning jig is arranged from the front side of the magnetic circuit so that the tip of the film part is arranged in the magnetic gap and the support part is arranged in the through hole defined in the magnetic circuit . And the process of
The voice coil, to be positioned outside of the film portion, and a second step of placing in the magnetic gap,
A third step of removing the film part from the magnetic gap by pushing the support part to the front side of the magnetic circuit after the vibration system is attached ;
And a fourth step in which the film part is taken out to the back side of the magnetic circuit through the through hole by the support part being pulled out to the back side of the magnetic circuit through the through hole . Production method.   2. The speaker according to claim 1, wherein the film portion of the voice coil positioning jig includes a plurality of films stacked in the same direction, and the position of the voice coil is defined by the plurality of stacked films. Production method. The first step includes
Attaching a voice coil positioning jig to the gap gauge;
A step of defining a magnetic gap to form the magnetic circuit by the gap gauge the voice coil positioning jig is attached,
The method further comprises the step of detaching the gap gauge from the magnetic circuit while the voice coil positioning jig is disposed on the magnetic circuit by removing the voice coil positioning jig from the gap gauge. Or the manufacturing method of the speaker of 2. The gap gauge, possess a notch groove for inserting the film, and a claw portion for engaging said film unit,
The speaker manufacturing method according to claim 3, wherein the gap gauge and the voice coil positioning jig are attached and detached by relatively rotating the gap gauge and the voice coil positioning jig .

Images