JPS61167300A - Method for producing small sized speaker - Google Patents

Abstract

PURPOSE:To remove troubles caused by poor shaping of lead wires or the effect due to the presence of shaping tools by previously forming a lead wire length shaping tool at the time of frame formation and removing the shaping tool after length adjustment and shaping of the lead wires. CONSTITUTION:In a small-sized speaker such as headphone, a magnetic circuit 2 is provided at the center of a frame 1, an attachment seat 1a for attaching a diaphragm 4 is mounted at the periphery and a terminal TM7 is provided on the central wall surface. On the front surface of the frame 1, the periphery of the diaphragm 4 is secured on the seat 1a with a voice coil 5 facing to the magnetic circuit 2. The rear end of a lead wire 6 connected at one end to the coil 5 is passed through a space between the diaphragm 4 and the frame 1 so as to be inserted and secured to the TM7. A shaping tool 9 is removable and projects to the front side from the back side between the TM7 and the circuit 2. The lead wire 6 is engaged halfway by the shaping tool 9 the lead wire 6 is adjusted in length and shaped. The shaping tool 9 is then removed.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention mainly relates to a method of manufacturing a small speaker used in headphones, telephones, etc.

[Prior art]

Usually, this type of small speaker is constructed as shown in Fig. 6.7.

FIG. 6 is a vertical cross-sectional view showing the configuration of a conventional small speaker, and FIG. 7 is a rear view of the same, in which a case 63 with a magnetic circuit 62 fixed is fitted into a hole bored in the center of a disc-shaped frame 61. At the same time, the diaphragm 64 is fixed to the mounting seat 61a provided on the front peripheral edge of the frame 61, with the voice coil 65 provided on the back surface facing the outer periphery of the magnetic circuit 62, and the voice coil 65 is A terminal fitting 67 of a terminal 67 whose one end is connected and the other end of a lead wire 66 made of flexible wire is fixed to the radially intermediate portion of the frame 61
It is configured by soldering to a.

By the way, when manufacturing a small speaker as described above, the frame 61 is integrally molded from synthetic resin using the following process, and then a case 63 with a magnetic circuit 62 fixed thereto is attached to the center of the frame 61, and a case 63 with a diameter A terminal pool 67 made of synthetic resin with a terminal fitting 67a fixed thereto is fixed to the wall in the middle of the direction, a diaphragm, and a voice coil 65 are fixed to the rear side of the diaphragm 4. Then, the other end of the lead wire 66 whose one end is connected to the voice coil 65 is first passed through the hole 67b at the tip of the terminal fitting 67a caulked to the terminal 67 from the front side of the frame 6I.
In this state, the diaphragm 64 is fixed to the front side of the main body L and -muro 1 with its voice coil 65 facing the magnetic circuit 62. Then, while adjusting the length of the lead wire 6G, it is soldered to the terminal fitting 67a.

However, with such a configuration, it is difficult to properly determine the length of the lead wire 66, and if it is too short, the lead wire will break, or if it is too long, it will come into contact with the diaphragm and cause abnormal noise, leading to inconveniences such as variations in quality. There were drawbacks such as.

For this reason, in recent years, the configuration as shown in FIG. 8 or 9 is often used. FIG. 8 shows a frame 71 with windows 71b, 71b located on both sides of a terminal 77, one end of which is connected to the voice coil through the windows 71b, 71b, and the other end of a lead wire 76 made of flexible wire connected to the frame 71. After pulling it out to the back side of the terminal, adjusting its length appropriately, and shaping the area from the voice coil to the window 71b, it is soldered to the terminal fitting 77a.

On the other hand, in the case shown in FIG. 9, the coil end of the voice coil 85 is used as a lead wire 86 and is fixed along the back surface of the diaphragm 84. The terminal fitting 8 of the terminal 87 is guided to the outer side of the frame 81 through a holder 811) provided on the mounting seat 81a on the periphery of the frame 81, and is provided on the back side along the outer peripheral surface of the mounting seat 81a.
7a.

[Problem that the invention seeks to solve]

In the conventional speaker as described above, for example, in the case of the configuration shown in FIG. 8, the window hole 71b.

71b is required to be relatively large in order to shape the lead wire 76 made of flexible wire, which affects the characteristics of the speaker itself, and also because the lead wire 76 is led out through the window holes 71b, 71b. There have been problems such as the inability to secure a dustproof net or the like, which tends to cause deterioration of characteristics due to intrusion of dust.

In addition, in the case of the configuration shown in FIG. 9, the lead wire 86 is fixed to the diaphragm 84, which not only affects the characteristics but also causes problems due to peeling, and requires time and effort to arrange the lead wire 86. was there.

[゛Means for solving problems]

The present invention has been made in view of the above circumstances, and its object is to form a shaping tool for adjusting and shaping the length of the lead wire made of flexible wire in advance near the terminal when shaping the frame. Adjust the length of the lead wire □ during the assembly process.

After the shaping has been performed easily and accurately, the shaping tool can be removed, and problems caused by incorrect lead wire lengths and poor shaping can be easily resolved, and the effects of the shaping and the presence of the tool remain. An object of the present invention is to provide a method of manufacturing a small speaker in which the size of the speaker is reduced.

The method for manufacturing a small speaker ('1) according to the present invention is to attach the voice coil to the front surface of a frame, which has a magnetic circuit in the center, a diaphragm mounting seat in the periphery, and a terminal on the wall of the middle part. Manufacture of a small speaker, in which the peripheral edge of the diaphragm is fixed on the mounting seat in a state facing the circuit, and the other end of the lead wire, one end of which is connected to the voice coil, is inserted and fixed into the terminal through the space between the diaphragm and the frame. In this method, a frame having a removable shaping tool protruding from the back side to the front side is used between the terminal and the magnetic circuit, and the lead wire, which is not fixed at the other end to the terminal, is inserted in the middle of the frame. The method is characterized in that the lead wire is fixed to a shaping tool, the lead wire is shaped, and then the shaping tool is removed.

〔Example〕

The present invention will be specifically described below based on drawings showing its implementation state. 15Q is a schematic sectional view showing the manufacturing process of the small speaker according to the present invention, FIG. 2 is a schematic back view, and FIG. 3 is a subdivision enlarged perspective view showing how the lead wire is shaped by a shaping tool. In the figure, 1 is a voice coil, 6 is a flexible wire lead wire, and 7 is a terminal.

The frame 1 is made of synthetic resin and has a disk shape, and has a mounting seat 1a on the front side peripheral edge that protrudes forward and fixes the peripheral edge of the guyaflame 4, and a magnetic circuit 2 in the center.
There is a hole 1b for the camp 3 to which the
c, and a frame l in this hole 1c.
A gap 8 is provided near the center of the body, and a shaping tool 9 is positioned within the gap 8 and suspended by connecting portions 9a, 9a. A case 3 with a magnetic circuit 2 fixed thereto is placed in the hole 1a of the frame 1, and a terminal fitting 7a is placed in the hole 1c.
, 7a are respectively fitted or fixed with an adhesive. The terminal 7 is made of an insulating material, has a fan shape in plan view, and has two terminal fittings 7a, 7.
a is caulked, and the caulked portion has a hole 7b with a diameter large enough to pass the terminal 7 through N and the lead wire 6;
7b is open.

The gap 8 in the frame l is formed as an arcuate slit along the edge of the terminal 7 fixed in the hole 1c on the center side of the frame 1, and the shaping tool 9 is plate-shaped and is formed at the center of the frame l. It is curved in an arc shape so as to be concentric with the air gap 8, and one half (upper half)
protrudes toward the front side of the frame l, that is, the diaphragm 4 side, and the other half (lower half) protrudes toward the rear side, and both sides in the width direction are formed so as to pass between this and the peripheral wall of the gap 8. It is integrally supported by the frame l at connecting parts 9a, 9a which can be easily cut.

There are no particular limitations on the length of upward and downward protrusion of this orthopedic tool 9, the radius in the circumferential direction, and the shape.
For example, the height of the upward protrusion is such that one end is connected to the voice coil 5.
When the lead wire 6 connected to the terminal 7 is soldered to the terminal fitting 7a of the terminal 7 over the upper edge of the shaping tool 9,
Any material may be used as long as it can be maintained at a height that does not come into contact with the diaphragm 4 even when it vibrates.

Further, the length of the shaping tool 90 protruding toward the lower blade direction is set to such an extent that there is no problem in grasping the lower end of the shaping tool 9 and cutting the lower connecting portions 9a, 9a after completing the assembly of the speaker.

Furthermore, the width dimension is such that when both lead wires 6.6 are arranged between the voice coil 5 and the terminal fitting 7a of the terminal 7, each lead wire 6.6 does not come off to the side of the shaping tool 9.
It is sufficient if it is related to the "near" of "U1!7".

The diaphragm 4 has a truncated conical shape, and a voice coil 5 is fixed at the center of the back surface, and one end of a lead wire 6 made of a flexible wire is connected to the voice coil 5. Then, the other end of the lead wire 6 is passed through the terminal 7 and the hole 7b of the terminal fitting 7a, and the middle part of the lead wire 6 is locked to the upper edge of the shaping tool 9 as shown in FIG. With the diaphragm 4 facing around the magnetic circuit 2, the peripheral edge of the diaphragm 4 is fixed onto the mounting seat la around the frame 1, as shown in FIG.

After fixing the diaphragm 4 to the frame 1, while pulling the other ends of the lead wires 6, 6 drawn out to the back side of the frame 1 with appropriate tension, attach the terminal fitting 7a.

It is integrally soldered to 7a. When the soldering is completed, as shown in FIGS. 4 and 5, grasp the lower end of the shaping tool 9, that is, the end protruding toward the back side of the frame 1, and pull the shaping tool 9 downward to cut the connecting parts 9a and 9b. and remove the orthopedic tool 9. The means for removing the orthopedic tool 9 is not particularly limited, and in addition to cutting the connecting portions 9a, 9a with a cutter, a method of cutting off with heat may be used.

When the shaping tool 9 is removed, the lead wire 6.6 held by the shaping tool 9 loses its binding force.
The lead wire 6.
6 is subjected to appropriate bending and shaping, so it has strong independence and less deformation due to vibration.

Note that after the orthopedic tool 9 is removed, a slit-shaped void 8 is formed in the frame 1 as shown in FIG. It can also be easily sealed with a net.

〔effect〕

As described above, in the method of the present invention, the lead wire is connected to the terminal while being latched to the orthopedic tool integrally molded on the frame in advance, so the lead wire can be wired even if the inside cannot be seen. It is possible to always bend and form the shape into a constant shape, and there is no variation in quality, and the slack state of the lead wire can always be set to the optimum value, reliably preventing problems such as contact with the diaphragm. Further, the present invention has excellent effects such as the ability to shape the lead wires extremely easily and accurately during the manufacturing process.

[Brief explanation of drawings]

Fig. 1 is a schematic sectional view showing the manufacturing process of the method of the present invention, Fig. 2 is a rear view, Fig. 3 is a partially enlarged perspective view showing how the shaping tool is used, and Fig. 4 is a small speaker after manufacturing. FIG. 5 is a schematic half-cut rear view showing the structure of the same, FIG. 6 is a conventional cross-sectional view, FIG. 7 is a rear view thereof, and FIGS. It is a half-cut sectional view of the product. 1... Frame la... Mounting seat 1b... Hole
1c...hole 2...magnetic circuit 3...case 4.
...Diaphragm 5...Voice coil 6...Lead wire 7...Terminal 7a...Terminal fitting 7b
... Hole 8 ... Gap 9 ... Orthopedic tool 9a ...
Connecting part

Claims (1)

[Claims] 1. At the front of a frame that has a magnetic circuit in the center, a diaphragm mounting seat on the periphery, and a terminal on the wall in the middle, place the voice coil on the periphery of the diaphragm with the voice coil facing the magnetic circuit. is fixed on the mounting base, and the other end of the lead wire, one end of which is connected to the voice coil, is inserted and fixed to the terminal through the space between the diaphragm and the frame, in which the After the lead wire is shaped by using a frame having a removable shaping tool protruding from the back side to the front side, the lead wire whose other end is to be fixed to the terminal is latched to the shaping tool midway through the frame. , a method of manufacturing a small speaker characterized by removing a shaping tool.