JPH0362292B2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a method for manufacturing a coil, and in particular, eliminates stress in the wire material that tends to occur at the beginning of winding a coil using ultra-fine wire, thereby increasing the reliability of the product. The present invention relates to a method of manufacturing a superfine wire coil.

(Prior art) A method of manufacturing a coil using a conventional winding machine involves the steps of winding the wire at the beginning and end of winding onto a conductive terminal pin (hereinafter referred to as a pin), and winding it around a member to be wound. In each case, apply an appropriate tension depending on the wire material, and after winding the coil, solder the exposed part of the terminal to connect the wound part of the coil and the exposed part of the terminal at the beginning and end of winding. The wire between the parts is in a taut state under some tension as shown in FIG.

In particular, the tension is stronger between the coil and the terminal part at the beginning of winding.

As shown in Fig. 8, the wire rod at the winding start position 1s of the coil is first wound around the winding core member of the member to be wound, and is located at the lowest layer of the coil, and then becomes the upper layer of the coil. , 1i are sequentially wound, as the wire is wound around the upper layer, the winding start position 1s of the coil is gradually drawn into the center of the coil, and the wire between the terminal binding part and the winding start position 1s is gradually drawn into the coil center. This is because the tension applied to 1b becomes stronger.

(Problems to be Solved by the Invention) Recently, as electronic components have become smaller and smaller, the wires used in coils have become increasingly thin.

However, when the thickness of the wire becomes 4/100 mm, it is possible to manufacture coils using conventional manufacturing methods, but after mounting the finished product on an electronic package, etc., the part between the coil part and the pin on the winding start side is Accidents have occurred in which wires have broken.

For example, at the position indicated by 1g in Figures 4 and 8, the tension in the wire at the start of winding is too strong as described above, and the tension is caused by slight external distortion of the wire-wound member when subjected to vibration. However, the tension on the wire is applied and the wire breaks.

As described above, the conventional coil manufacturing method has a problem in that when ultrafine wire is used, the wire is likely to break near the beginning of winding after the product is completed.

Furthermore, although such accidents do not occur with the finished coil alone, they often occur after it is mounted on a board or package. Therefore, not only the coil, but other parts also affect the board and the entire package, causing significant damage.

In order to overcome these drawbacks, several methods have recently been proposed to provide slack in the wire between the terminal pin tangle and the coil winding start position.

One of them is to provide a removable protruding part that partially protrudes from the surface of the brim at the end of the coil bobbin, and connect the lead wire of the winding to a terminal provided on the brim by straddling this protruding part. In this method, the protruding parts are removed after being wrapped and fixed.

This method has the disadvantage that each coil bobbin must be machined to be thin, and the small protruding parts must be pulled out against friction caused by the tension of the windings, making the equipment and manufacturing process complicated. There is.

Another method is to set the position at which the winding is tied to the terminal pin away from the terminal support part, and then after the winding is tied, the position at which the winding is tied is brought closer to the support part of the terminal before being fixed.

Although this method is simple and effective, the structure of the correction tool, which is shown as a tool for bringing the barbed part closer to the terminal support part, is complicated, and the correction tool is supported along the extension line of the spindle. However, there are drawbacks such as the need for extra space to use correction tools.

The object of the present invention is to eliminate such drawbacks, and to make it possible to use a simple correction tool by simply adding it to a conventional device without requiring any extra space.
To provide a method for manufacturing an ultra-fine wire coil that eliminates abnormal tension in the wire at the start of winding and prevents the wire from breaking at that part for some reason after completion.

(Means for Solving the Problems) In order to achieve the above-mentioned object, the method for manufacturing an ultra-fine wire coil of the present invention involves hooking the winding start side of the wire 1 to a pin 4 provided on a member to be wound. When attaching the pin 4 to a position away from the support part 4a, after making the coil, it is shaped like a rod and has a split groove 5 along the longitudinal direction at the tip.
a, the tip is divided into two by the split groove 5a, and the groove width is widened in the middle of the split groove 5a.
Using the correcting tool 5 for correcting the position of the hair, move the correcting tool 5 so that the tip of the pin 4 is inserted into the hole 5b, and then insert the tip between the two divided tips 5c and 5d of the correcting tool 5. Fixing tool 5 so that pin 4 is caught
, and further move the correction tool 5 along the pin 4, and move the curling part 1a of the wire 1 along the pin 4.
By moving the wire closer to the support part of the wire rod 1, the wire rod 1 is slackened at the part wrapped around the pin 4 and at the winding start position of the coil wound on the wire-wound member.

(Example) Next, an example of the present invention will be described with reference to the drawings.

FIG. 1 is an explanatory diagram (front view) showing a manufacturing method according to an embodiment of the present invention.

FIG. 2 is a perspective view showing an example of an ultrafine wire coil manufactured by the method of the embodiment shown in FIG.

FIG. 3 is a front view of the coil of FIG. 2.

First, before explaining the manufacturing method of the present invention, an example of a target product will be explained.

As shown in FIGS. 2 and 3, the coil that is the subject of this embodiment has a core (which also serves as a ferromagnetic bobbin) in which the members to be wound are a base 3 and a ferromagnetic bobbin that is bonded to the base 3 with an adhesive. It consists of two parts (hereinafter referred to as core).

The base 3 is provided with pins 4, 14, etc. that connect the winding start and winding end of the core to serve as conductive terminals.

The winding start of the coil 1c wound around the core 2 is 1s, and the winding end is 1f. Start of winding 1
The wire rod s is tied around a pin 4 to form a tied portion 1a, and the wire on the end 1f side of the winding is tied around another pin 14 to form a tied portion 1e.

The wire rod 1d between the winding end 1f of the coil 1c and the tangled portion 1e retains the tension that it was under when the tangled portion 1e was formed, and is in a taut state. 1s at the beginning of winding
The wire rod 1b between the tangled portion 1a is in a slack state, and it is an object of the present invention to make the slack in this portion by a simple method using a correction tool having a simple structure.

Next, an embodiment of the method for manufacturing an ultrafine wire coil according to the present invention will be described.

FIG. 6 is a perspective explanatory view showing the step of moving the rib portion in the embodiment of the method for manufacturing an ultra-fine wire coil according to the present invention.

FIG. 1 is an explanatory diagram showing the method of the embodiment of FIG. 6 in a front view.

FIG. 5 shows a correction tool 5 for correcting the position of the tangle, which is used in the process of FIG. 6 (corresponding to FIG. 1), in which a is a front view and b is a bottom view.

FIG. 7 is a perspective view of the main parts showing the state in which the correction tool 5 is attached to the winding machine. In addition, in Figure 7,
The nozzle holder 7 is partially cut away to make it easier to see the wire-wound member around which the coil is wound and the bobbin chuck 10 that holds the wire-wound member.

As shown in FIG. 5, the correction tool 5 used for correcting the position of the tangle, which is a feature of the manufacturing method according to the present invention, is rod-shaped and has a split groove 5a along the longitudinal direction at the tip; 6d is divided into two parts.
Furthermore, a hole 5b is provided in the middle of the split groove 5a to widen the groove width.

Note that the gap between the tips 5c and 5d is made smaller than the thickness of the pin 4. Therefore, since the material of the correction tool 5 has some elasticity, if the pin 4 is inserted into the hole 5b and the correction tool 5 is moved in the direction of the arrow in FIG. , pin 4
This allows the pin 4 to be sandwiched between the tips 5c and 5d.

As shown in FIG. 7, the correction tool 5 having such a structure is attached to the nozzle holder 7 of the winding machine along with the nozzle 6 by means of a holding plate 8 and screws 9, 9.

The nozzle holder 7 can be moved up and down, left and right, and back and forth by an automatic control mechanism (not shown), and can be moved from a position with the tip of the nozzle 6 facing downward to a position toward the bobbin chuck 10 as shown in FIG. You can change your posture to a horizontal orientation.

In addition, a bobbin chuck 1 that holds a member to be wound is provided.
0 can rotate at high speed while holding the member to be wound.

When making a coil, first place the nozzle holder 7 as described above while the base 3 of the member to be wound does not move.
The wire rod 1 passing through the nozzle 6 is wound around the conductive terminal pin 4 by a conventionally known method by making full use of the above-mentioned operation, thereby forming a tangled portion 1a at the winding start side.

As shown in FIGS. 1 and 6, this binding portion 1a is wound at a position slightly apart from the support portion 4a of the pin 4.

Next, the nozzle 6 is moved so that it is located near directly above the core 2, so that the wire rod fed out through the nozzle 6 is sequentially wound from one end of the cylindrical core of the core 2 to the other. While slowly reciprocating, the bobbin chuck 10 holding the member to be wound is rotated at high speed to wind the coil 1c.

When the coil 1c finishes winding, the winding part 1
In the same manner as in step a, the end of the winding 1e is tied around the pin 14, and then the wire 1 is passed through the nozzle 6.
Cut between the tip and the barbed portion 1e.

Finally, in order to slacken the wire 1b between the previously formed winding start barb 1a and the winding start 1s of the coil 1c, the position of the winding start barb 1a is moved along the pin 4 to the pin support part 4a. move it closer.

For this purpose, first, the hole 5a of the correction tool 5 is moved onto the axis of the pin 4, and the correction tool 5 is moved so that the tip of the pin 4 is inserted into the hole 5a.

Next, pull up the correction tool 5 in the direction of the arrow Z shown in FIG.
In between.

Next, by moving the correction tool 5 in the direction shown by the arrow Y in FIG.
As a result, the winding start barbed portion 1a can be brought closer to the support portion 4a of the pin 4.

By doing this, the state of the wire 1b between the winding start 1s of the coil 1c and the winding start tether 1a changes from the state shown in FIG. 1 to the state shown in FIG. 3, causing slack, and almost no tension is applied. state.

Note that the operation of the correcting tool 5 for moving the tangled portion 1a at the beginning of winding may be repeated a plurality of times when it is necessary to arrange the tangled portion 1a in an attractive manner. Furthermore, if the winding machine is one that winds a plurality of coils at the same time, the movement of the winding start tether 1a, which is tied to the pin 4 attached to the same location on each member to be wound, is performed at the same time. can be done and
It is also possible to perform one step at a time.

Furthermore, in the above-described embodiments, the terminal pins are parallel to the central axis of the coil, but the present invention can be similarly applied to coils in which the angle of the terminal pins is changed.

(Effects of the Invention) As described above, in the present invention, the tangled portion at the beginning of winding is separated from the base of the pin when the tangled portion is first twisted, and after the coil is formed, the tip of this tangled portion is split into two. Using the ivy rod-shaped correction tool 5, the wire is slackened between the winding start tangle and the coil winding start position by sandwiching the pin between its two tip parts and bringing it closer to the base of the pin. Therefore, it is possible to produce a coil in which the abnormal tension generated in the wire at the beginning of winding as described above is removed. Using ultra-fine wires of about 4/100 mm, it is possible to create coils that will not cause any problems after mounting.

Moreover, the structure of the correction tool is simple, and it can be attached to the nozzle holder of a conventional winding machine with simple processing.
This has the advantage that no extra space is required at all.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram (front view) showing an ultrafine wire coil manufactured by a method according to an embodiment of the present invention. FIG. 2 is a perspective view showing an example of a product manufactured by the method of the embodiment shown in FIG. FIG. 3 is a front view of the ultrafine wire coil of FIG. 2. Figure 4 shows
FIG. 2 is a front view showing an example of a conventional coil. FIG. 5 is a front view and a bottom view of a correction tool for correcting the position of a hairline used in an embodiment of the method for manufacturing an ultra-fine wire coil according to the present invention. FIG. 6 is a perspective explanatory view showing the step of moving the rib portion in the embodiment of the method for manufacturing an ultra-fine wire coil according to the present invention. FIG. 7 is a perspective view of a main part showing a state in which a correction tool is attached to a winding machine. FIG. 8 is a cross-sectional view of a part of the coil for explaining the reason why abnormal tension occurs in the wire at the start of coil winding. 1... Wire rod, 2... Core, 3... Base, 4, 14
...pin, 5...correction tool, 6...nozzle, 7...nozzle holder, 8...pressing plate, 9...screw, 10...bobbin chuck.

Claims (1)

[Scope of Claims] 1. In a method for manufacturing a coil using an extra-fine wire, when the winding start side of the wire is tied around a conductive terminal pin provided on a member to be wound, the winding start side of the wire is lowered from the conductive terminal pin support part. After the coil is made, the tip is split into two parts by the split groove, and a hole is formed in the middle of the split groove to widen the groove width. Using a correction tool for correcting the position of the tangle, move the correction tool so that the tip of the conductive terminal pin is inserted into the hole, and further insert the conductive terminal pin between the two divided tips of the correction tool. By moving the correction tool so that the terminal pin is pinched, and further moving the correction tool along the conductive terminal pin, and bringing the tangled part of the wire closer to the support part of the conductive terminal pin. . A method of manufacturing an ultra-fine wire coil, in which the wire is slackened between a portion wrapped around the conductive terminal pin and a winding start position of the coil wound on the wire-wound member.