JP3033031B2 - Small transformer winding method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a winding method for mass-producing a small transformer having a plurality of coils.

[0002]

2. Description of the Related Art Many conventional small transformers include a cylindrical bobbin having flanges at both ends, a coil wound on the bobbin, and a core assembled inside the bobbin.
It consists of terminal pins that are implanted on the flange of the bobbin and that have their coil ends fastened. A trigger transformer of a flash discharge light emitting device used as a photographing illuminator includes a secondary coil wound a number of times by a very thin wire, and a winding having a larger wire diameter than the secondary coil. And a primary coil wound several tens times with a wire. The above-mentioned bobbin is assembled with an I-shaped core made of a ferrite material to constitute a trigger transformer.

[0003]

As in the above-described trigger transformer, a small transformer in which a primary coil and a secondary coil are wound with wires having different wire diameters has a secondary coil having a small wire diameter. After winding by an automatic winding machine, a primary coil having a large wire diameter is wound by another automatic winding machine, and conversely, a secondary coil is wound after a primary coil is wound first. In this way, every time the wire diameter of the coil to be wound is different, the winding part, which is a semi-finished product of a small transformer, is transferred to another automatic winding machine and wound. A transfer step and a step of newly setting the transferred winding parts in the automatic winding machine are added, and this is an important problem in improving the winding efficiency. In addition, providing an automatic winding machine every time a coil having a different wire diameter is wound has a problem that the space and cost of the winding machine equipment are increased. Although an automatic winding machine capable of winding a plurality of coils having different wire diameters by one unit has been developed, it is not used much at present because of its complicated structure and high cost.

An object of the present invention is to develop a winding method for a small transformer capable of efficiently winding a plurality of coils having different wire diameters in view of the above-mentioned circumstances.

[0005]

In order to achieve the above-mentioned object, the present invention provides a method of sequentially winding a number of small transformers, wherein at least two coils of the preceding small transformer are wound. When one of the single-wound coils approaches the end of the winding after being fixed to the first terminal pin of the small transformer, the winding length of the other coil that continuously winds these windings is compared with the winding length of the other coil. long enough formed by folding a length to form a twisted wire, one co a portion of the twisted Te
After winding as-yl moiety, and fastened to the second terminal pins as the winding end of one coil, after fastened by passing the strands to a third terminal pin Subsequently, with its more lines other of by winding a coil fastened to the winding end to the second terminal pins, subsequently, it was fastened to a first terminal pin of small transformer and then winding the strands, the small transformer <br/> After pulling out to form the beginning of winding of one coil,
Preceding a second small transformer which winding, a stranded wire handed between a third terminal pin, small Tran was windings in advance
Wire drawn between the transformer and the next small transformer to be wound
And a winding method for a small transformer characterized by sequentially winding the same in the following manner.

[0006]

According to this winding method, one coil is wound by a single-wire wire, and the other coil is wound by a stranded wire formed by folding the above-described wire. When one of the coils wound by the single-wire wire approaches the end of the winding, the single wire is formed into a stranded wire having a fixed length. The winding end of one coil is wrapped around the second terminal pin as a stranded wire,
Thereafter, the stranded wire is transferred to the third terminal pin without being cut off, and is stripped. The strand wrapped around the third terminal pin is subsequently wound as the other coil, and the winding end is wrapped around the second terminal pin which is wound around the winding end of one coil. The stranded wire wound on the second terminal pin is wound on the first terminal pin of the small transformer to be newly wound to form one winding start portion. The small transformer wound in this way is composed of a stranded wire passed between the second and third terminal pins , a previously wound small transformer, and a next wound wire.
Cut the stranded wires passed between the small transformers .

[0007] By winding as described above, one of the coils becomes a single stranded wire at the start and end of winding, and
Further, the other coil is wound with a stranded wire of the same wire as the one coil.

The small transformer wound as described above can be wound on various small transformers having a plurality of coils having different wire diameters by using coils having the same wire diameter.
In addition, since each coil can be wound continuously, winding by one automatic winding machine becomes possible.

[0009]

Next, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view of a trigger transformer provided in a flash discharge light emitting device as a photographing illuminator, FIG. 2 is a longitudinal sectional view of the trigger transformer, and FIG. 3 is a simplified circuit diagram of the trigger transformer. .

In these drawings, the bobbin 50 has flanges 50b and 50c at both ends of a rectangular tubular winding portion 50a, and four terminal pins 51 to 54 are planted on a thick portion of one flange 50b. The two terminal pins 51 and 52 are a common terminal pin and a low-voltage terminal pin, and the other terminal pins 53 and 54 are idle terminals. The other flange 50c has a convex portion 50d.
Are formed integrally, and the high voltage side terminal pins 55
Are implanted and fixed to be horizontal as shown in the figure. After winding the secondary coil 56 on the winding part 50a of the bobbin 50, the primary coil 57 is wound with the same winding wire as the secondary coil 56. Secondary coil 56
, Using a single wire of, for example, about 0.04 mm (diameter), and the primary coil 57 wound with a plurality of (for example, three) same wires as the secondary coil 56. It is. One end of the secondary coil 56 is drawn out from the guide groove 50e and fixed to the high voltage side terminal pin 55, and the other end is drawn out from the guide groove 50f and fixed to the common terminal pin 51. On the other hand, one end of the primary coil 57 is
0g, and is fixed to the low voltage side terminal pin 52, and the other end is fixed to the above-mentioned common terminal pin 51 in common with the other end of the secondary coil 56. The bobbin 50 equipped with the coils 56 and 57 has the winding portion 50
The trigger-transformer is formed by mounting a pillar-shaped ferrite core 58 in a. Insulation tape around the outside of the coil
Loop 59 is wound.

The above-mentioned trigger transformer is wound by an automatic winding machine shown as an example in FIG. This automatic winding machine includes a rotary table 61 having a radially arranged winding jig 60 and a flyer 62 provided to face the winding jig 60. The wire reel is connected to the flyer 62 via a tension device 63 and a twisting machine 64.
The winding wire 66 is sent from the screw 65.
The above automatic winding machine mounts the bobbin 50 on the winding jig 60,
Winding is performed while rotating the rotary table 61 intermittently by 1/4 turn.

FIG. 5 is a plan view of the rotary table 61. In FIG. 5, the winding jig 6 located on the lower side is shown.
The bobbin 50 is attached to 0. The bobbin 50 set as described above is moved to the right side position facing the flyer 62 by rotating the rotary table 61 1/4. In this rotation position, the secondary coil 56 and the primary coil 57 are wound around the winding portion 50a of the bobbin 50 by turning the flyer 62. In this winding process, the winding wire 66 is wound by a single wire a predetermined number of times to form the secondary coil 56. When the secondary coil 56 nears the end of the winding, the winding is temporarily stopped and the twist is stopped. The strand is formed by the machine 64.

Here, the twisting machine 64 forms a stranded wire by the method shown in principle in FIGS. That is, the winding wire 66 is folded back using the pair of hanging pins 67 and 68 arranged at a predetermined interval. That is, the bobbin 50
The drawn wire 66 is hung on the outside of one hook pin 67 and then hung on the outside of the other hook pin 68 to form the wound wire 66 on the tension device 63 side. By this operation, the winding wire 66 becomes three double wires between the hanging pins 67 and 68.
Thereafter, the hanging pins 67 and 68 are turned in a direction (pin axial direction) orthogonal to the winding wire 66 to pull out the three double wires, and when more finished, the hanging pins 67 and 68 are pulled out from the winding wire 66. By this operation, a stranded wire 69 having a predetermined length as shown in FIG. 8 is formed.

When the automatic winding machine is restarted after the wire 69 is formed as described above, the secondary coil 56 is continuously wound, and the stranded wire 69 is wound as the secondary coil 56 by two to three turns. After being drawn, the stranded wire 69 is pulled out from the guide groove 50f and is wrapped around the common terminal pin 51. The stranded wire 69 tied to the common terminal pin 51 is transferred to the low-voltage side terminal pin 52 without being cut, and tied. The strand 69 laid on the low-voltage terminal pin 52 is a guide groove 50g.
From the primary coil 57. The primary coil 57 is wound around the secondary coil 56 with a stranded wire 69, pulled out from the guide groove 50f, and
It is tied to 1. After the secondary coil 56 and the primary coil 57 are wound as described above, the rotary table 61 is turned
It rotates and moves to the winding of the bobbin 50 which is newly sent to the flyer position. The twisted wire 69 wrapped around the low voltage side terminal pin 52 is rotated by 1/4 of the rotary table 61 without cutting, and the flyer 62 is moved by the high pressure side terminal pin 55 of the newly sent bobbin 50 to the wire 69. Then, the strand 69 is drawn into the bobbin 50 through the guide groove 50e. At this stage of operation, the crossover portion passed between the already wound bobbin and the bobbin to be wound is cut off. Then, the secondary coil 5 of the bobbin 50 to be newly wound
6 is wound. After the first two or three turns are wound by the stranded wire 69, the wire is wound with a single wire wire 66. That is, when the secondary coil 56 is wound two to three turns, the stranded wire 69 ends and becomes a single wire. When the winding of the secondary coil 56 nears the end, the automatic winding machine is temporarily stopped, and the twisting machine 64 forms a double wire of the stranded wire 69 shown in FIG. 8, and the winding is performed in the same manner as described above. . In the bobbin 50 in which the winding of the primary coil 56 and the secondary coil 57 has been completed, finally, the crossover passed between the common terminal pin 51 and the low-voltage side terminal pin 52 is cut off.

FIG. 9 is a simplified circuit diagram of the secondary coil 56 and the primary coil 57 showing the above-mentioned winding process. The portion M is transferred between the already wound bobbin and the bobbin to be wound. N is the terminal pins 51, 5
It is a crossover that was delivered between the two. Then, both the portions M and N are cut off as described above. The bobbin 50 wound in this manner is sequentially sent out, and the bobbin 50 sent to the left lateral position of the rotary table 61 is removed from the winding jig 60 in FIG. The coil end portion tied to the terminal pin is then soldered. When the bobbin 50 is sent to the upper position or the left side position of the rotary table 61, the insulating tape 59 is wound around the coil.

As can be seen from the above description, the stranded wire 69 formed by the twisting machine 64 has a common terminal with the winding end portion 70 of the secondary coil 56 of the bobbin 50 wound first, as shown in FIG. The connecting portion 71 of the pin 51, the connecting wire portion N between the terminal pins, and the connecting portion 7 of the low voltage side terminal pin 52
2. The winding part 73 as the primary coil 57, the tying part 74 of the common terminal pin 51, the connecting wire M between the bobbin already wound and the bobbin to be wound, and the bobbin 50 to be wound next It is formed to have a length including a buckling portion 75 to the high voltage side terminal pin 55 and a winding start portion 76 of the secondary coil 56. As shown in FIG. 3, the small transformer wound by the above method is fixed to the high voltage side terminal pin 55 and the secondary coil 56 wound from the black spot side is wound by a single wire 66. The two coil end portions of the secondary coil 56 are stranded. Further, the primary coil 57 fixed to the low voltage side terminal pin 52 and wound from the black spot side becomes an overall wire.

In the case of winding by the above-described winding method, if an insulating tape or the like is provided between the secondary coil 56 and the primary coil 57, the automatic winding machine must be provided with a tape winding mechanism. However, the winding machine becomes complicated and expensive. Therefore, the secondary coil 56 is sequentially wound obliquely from the flange 50c side and wound up to the flange 50b. Oblique lap winding: winding part 5
The winding method is repeated while repeating the winding pitch in an oblique direction with respect to the cylinder axis 0a.
No. 08 publication. Since the voltage of the obliquely wound secondary coil 56 becomes lower as it approaches the flange 50b, as shown in FIG. 10, the primary coil 57 is wound around the secondary coil excluding the high voltage portion of the secondary coil 56.

[0018]

As described above, according to the winding method of the present invention, various small transformers having a plurality of coils having different wire diameters can be wound using the same wire diameter. In addition, since each coil can be continuously wound, winding efficiency can be greatly improved, for example, winding can be performed by one automatic winding machine. Furthermore, since the winding can be reliably started from the winding start side determined by the transformer design, and since each coil end portion fixed to the terminal pin becomes a stranded wire, the fixing strength to the terminal pin is increased. Will be higher.

[Brief description of the drawings]

FIG. 1 is a partially cutaway perspective view showing a trigger transformer of a flash discharge light emitting device in which a winding method of the present invention is implemented.

FIG. 2 is a longitudinal sectional view of the trigger transformer.

FIG. 3 is a simplified circuit diagram of the trigger transformer.

FIG. 4 is a simplified diagram showing an example of an automatic winding machine.

FIG. 5 is a plan view showing a rotating table of the automatic winding machine.

FIG. 6 is an explanatory diagram illustrating the formation of twisted wires of the twisting machine.

FIG. 7 is an explanatory diagram similar to FIG. 6, for explaining the twisting of the twisting machine.

FIG. 8 is a simplified diagram showing a stranded wire formed by a twisting machine.

FIG. 9 is an explanatory diagram showing a winding process of the trigger transformer.

FIG. 10 is a longitudinal sectional view of a trigger transformer similar to FIG. 2 in which oblique lap winding is performed.

[Explanation of symbols]

 Reference Signs List 50 bobbin 50a winding part 51, 52, 55 terminal pin 56 secondary coil 57 primary coil 66 winding wire 69 stranded wire

Claims (1)

(57) [Claims] In a method of sequentially winding a number of small transformers , a single wire is connected to a first terminal pin of the small transformer among at least two coils of the small transformer which is wound in advance. When one of the wound coils approaches the end of the winding, the windings are folded back to a length that is sufficiently longer than the winding length of the other coil that continuously winds the windings to form a stranded wire. Part of stranded wire is one coil
After winding the portion was fixed to the second terminal pins as the winding end of one coil, the strands subsequent third
After wearing stopped by delivery of the terminal pins, compact with their twisted and fastened the other winding end of the coil by winding to the second terminal pins, subsequently, the next winding the strands after then fastened to the first terminal pins of the transformer, drawn to form a winding start of one of the coils of the small transformer, prior
The stranded wire passed between the second and third terminal pins of the small transformer wound and wound, and the small transformer wound earlier
Then excised and twisted drawn between small transformer windings, a winding method of small transformers, characterized by the following similarly sequentially winding.