JPH01264207A - Trigger transformer for flash discharge light-emitting device - Google Patents

Abstract

PURPOSE:To reduce a difference in electric potential and a distribution capacity as much as possible to improve voltage resistance and efficiency and further to enables mass production by a method wherein a coil fixed to a terminal pin provided on the square jaw at the side of a bobbin is formed in a specific configuration. CONSTITUTION:A coil 16 is wound on a square cylinder 12a of a bobbin 12 having square jaws 12b, 12c. The coil end of a primary coil 14 is secured to terminal pins 13a, 13b. A secondary coil 15 is secured at its one end with the terminal pin 13a and at the other end with the terminal pin 13c. The square cylinder 12a is divided into four sections of a-d, and each section is wound, the primary coil 14 and the secondary coil 15 being formed. First, the primary coil 14 having a triangular cross area where winding pitches are reciprocated for the section a is formed. Then, a multi-layer winding is made for the section b. Following this, similarly, a multi-layer winding is made in the order of sections c, d, the secondary coil 15 being formed. As a result, not only line voltage difference and distribution capacitor are reduced, but coils can be reliably wound between sections.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application J This invention relates to a trigger transformer for a flash discharge light emitting device used as an illuminator for photographic photography.

``Prior Art'' Most trigger transformers for flash discharge light emitters that have been widely known in the past are wound as shown in FIG.

That is, FIG. 6 shows an example of a trigger transformer, and this trigger transformer includes a core iron core 1 having a flange portion 2.3 and a winding portion 4, and a multilayer structure formed by winding wires around the winding portion 4. It consists of a coil 5 and a terminal pin 6.7 implanted on the outside of the flange 2.3.

The coil 5 is made up of a primary coil and a secondary coil. When forming a secondary coil with a large number of windings, first, the winding pitch is advanced from the flange part 2 toward the flange part 3, and the first layer wound directly on the surface of the winding part 4 is applied to the flange part. First, the winding pitch is advanced in the opposite direction to the above, and the winding is wound from the collar part 3 to the collar part 2, and the second layer is formed around the first layer of the collar. The winding pitch is advanced from part 2 toward flange part 3 to form a third layer around the second layer.

Similarly, the fourth layer and the fifth layer 11. . 0. A secondary coil is formed by winding the

Of the coil ends of the secondary coil wound in this way, the high voltage side is fixed to the terminal pin 6, and the low voltage side is fixed to the terminal pin 7.The 9th coil is fixed to the secondary coil. A several-turn coil is wound on the outside of an insulating tape provided around the coil, and the end of the coil is pulled out as an external connection terminal. In addition, those with a structure in which a terminal pin for fixing the coil end of the secondary coil is embedded in the flange 2, and
There is a structure in which the coil 5 is wound around a cylindrical bobbin, and this bobbin has a columnar core iron core inside.

``Problems to be Solved by the Invention'' In the trigger transformer described above, the induced electromotive force acts most strongly on the coil in the 2nd layer, which is closest to the winding part 4;
Third layer 0. . ,. The effect of this induced electromotive force gradually decreases as the distance from the winding portion 4 increases. This causes a potential difference and distributed capacitance between each winding, especially between layers.

As is well known, the distributed capacitance acts not only to lower the Q of the coil but also to increase the potential difference between the lines, so if the output voltage of the trigger transformer is increased, the potential difference increases, causing corona discharge and dielectric breakdown. provoke.

It is an object of the present invention to propose a trigger transformer that reduces the above-mentioned potential difference and distributed capacitance as much as possible to improve withstand voltage and efficiency, is suitable for mass production, and is convenient for installation.

"Means for Solving the Problems" In order to achieve the above object, the present invention includes a prismatic core core made of ferrite material, a prismatic cylindrical bobbin in which the core core is housed, and a winding material wound around the bobbin. In the trigger transformer for a flash discharge light emitting device, the bobbin is integrally provided with rectangular flanges on both sides, and is implanted on the outer surface of one of the rectangular flanges so as to protrude in the longitudinal direction of the L core iron core. A low-voltage terminal bin is provided on the other rectangular flange, and a high-voltage terminal bin is embedded in a convex portion formed on the outer surface of the other rectangular flange so as to protrude substantially perpendicularly to the longitudinal direction of the core core. The coil includes a segmented winding formed in a triangular cross-sectional layer by reciprocating the winding pitch, and a segmented winding coil continued on the triangular cross-sectional layer by reciprocating the winding pitch, and the coil end is formed into each of the above-mentioned sections. We propose a trigger transformer that is fixed to a terminal bin.

``Function'' The trigger transformer configured as described above not only reduces line potential difference and distributed capacitance, but also has a flange between each section because the coil is wound at an angle. Even if it is not, it is possible to wind the wire reliably, and the trigger transformer form does not become large.

Further, since the trigger transformer is wound on a bobbin having a square flange, the bobbin can be held more reliably during the winding process than a bobbin having five circular parts, making the trigger transformer suitable for mass production.

Furthermore, the above-mentioned trigger transformer can be installed by inserting the low voltage terminal pin provided on one square flange into a printed circuit board, etc., but in this case, the high voltage terminal pin protrudes laterally from the other square flange. This makes it easier to connect the terminal bin to other electrical components, and
Since the high-voltage terminal bin and the low-voltage terminal bin are sufficiently spaced apart, there is no risk of electrical leakage between these terminal bins.

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

FIG. 1 is a sectional view of the trigger transformer, and FIG. 2 is a front view of the trigger transformer.

In these figures, 11 is a prismatic core core made of ferrite material, 12 is a bobbin having a square cylindrical portion 12at< into which the core core 1 is inserted, and this bobbin 12 has square cylindrical portions 12at on both sides of the prismatic tube portion 12a. The collar portion], 2b, and 12c are integrally formed.

13a-13b are the low-voltage terminal pins embedded in the rectangular flange 12b of the core 11 so as to protrude in the longitudinal direction of the core 11, and 13c are orthogonal to the longitudinal direction of the core 11. This pin 13c is a high voltage terminal pin provided on the other square flange 12c so as to
It is implanted in the convex portion 12d formed in the.

16 is a transformer coil consisting of a primary coil 14 and a secondary coil 15. This coil 16 is wound around the rectangular tube portion 12a of the bobbin 12, and the coil ends of the secondary coil 14 are connected to terminal bins 13a, 13b. The secondary coil 1
One end of 5 is fixed to the terminal pin 13a, and the other end is fixed to the terminal pin 13c.

The above-mentioned coil 16 is segmentally wound according to the illustrated sections a" d. That is, in this embodiment, the rectangular tube portion 12a is divided into four sections a" d, and a wire is wound for each of these sections. A primary coil 14 and a secondary coil 15 are formed.

When winding, first, one section a is wound in multiple layers to form the primary coil 14, the first section is wound in multiple layers, and then sections c and d are similarly wound in multiple layers in order to form the secondary coil 1. -5 is formed.

FIGS. 3 to 5 are explanatory diagrams showing the winding process of the above-mentioned segmental winding.

First, referring to FIG. 3 showing the winding of section a, the 1N wire wound on the surface of the square tube part 12a is the square collar part 1.
The winding pitch is advanced in the direction away from 2b to the boundary of section a, and then the winding is transferred to the second layer.
The winding pitch is advanced in the direction of the square flange 2b so that the first winding of the layer does not protrude from the boundary of the section a, thereby forming a second layer coil wound around the first layer.

Next, the first winding is transferred to the third layer and wound within the range of section a.

Thereafter, fourth and fifth layer coils are formed in the same manner.

In this embodiment, the fifth layer coil of section a is at the position aQ shown in the figure, so the winding is pulled out from this position aQ and fixed to the terminal pin.

As shown in Fig. 4, the winding of the section is wound by advancing the winding pitch to the left from the winding position bΩ1 until it reaches the boundary of the section, forming the first layer coil, and then winding the winding at the section bΩ1. Move to the second layer, advance the winding pitch to the right, and form the second layer coil within the range. Next, the winding is transferred to the third layer and the winding pitch is advanced to the left.
Wind the fifth layer.

Since the final winding position of the section is the final winding position bΩ2 of the fifth layer, move the winding of this position iib Qx to the first winding position CΩ1 of the first layer of section C, as shown in Fig. 5. Wind the wire. The winding method for section C is the same as that for the above-mentioned section, and the same is true for section 1 d.

Note that the arrows shown in FIGS. 3 to 5 indicate the direction of movement of the winding pitch.

As described above, the primary coil 14 and the secondary coil 15 are formed by winding the sections a" and d, but as already mentioned, the winding start end and winding end of these coils are connected to each terminal pin 1.
3a, 13b, and 13c.

Now, when the wires are wound as described above, the potential difference and distributed capacitance not only between the first and fifth layer coils but also between each layer, that is, the potential difference and distributed capacitance appearing between the wires, are compared to conventional products. and becomes extremely small. Furthermore, since the boundary between the coils wound in each section and the next coil to be wound is inclined, winding deformation can be reliably prevented by providing the coil to be subsequently wound along this inclination.

As described above, in the trigger transformer according to the present invention, the potential difference and distributed capacitance between lines can be reduced without enlarging the form, and the withstand voltage and efficiency of the trigger transformer can be improved.

It should be noted that the present invention can be implemented with either a trigger transformer that is wound directly on an iron core or a trigger transformer that is wound on a bobbin, and the number of sections in which the wire is wound can be increased or decreased as necessary. When winding these sections, the winding method is not limited to the method of reciprocating the winding pitch as shown in the above embodiment, but any winding method can be used as long as the coils can be inclined.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of a trigger transformer showing an embodiment of the present invention, Fig. 2 is a bottom view of the trigger transformer, and Figs.
FIG. 5 is an explanatory diagram showing a method of forming the coil of the trigger transformer, and FIG. 6 is a simplified sectional view of the trigger transformer shown as a conventional example. 11... Core iron core 12... Bobbins 12b, 12c... Square collar portion 12d... Convex portions 13a, 13b... Terminal pin 13c for low voltage... Terminal pin 16 for high voltage... Coil patent applicant Kijima Musen Co., Ltd. Figure 1 Figure 2 13k) 11 = 1q〒 Figure 6

Claims (1)

[Claims] In a trigger transformer for a flash discharge light emitting device, which consists of a prismatic core iron core made of ferrite material, a prismatic cylindrical bobbin in which the core iron core is housed, and a coil wound around this bobbin, on both sides of the bobbin, A square flange is integrally provided, and a low voltage terminal pin is implanted on the outer surface of one of the square flange parts and protrudes in the longitudinal direction of the core iron core.
The other rectangular flange is provided with high voltage terminal pins that are implanted into convex portions formed on the outer surface of the flange and protrude substantially perpendicularly to the longitudinal direction of the core core, and the coil has a winding pitch. A trigger transformer comprising a segmented winding formed by reciprocating to form a triangular cross-sectional layer, and a segmented winding coil continuing to the triangular cross-sectional layer by reciprocating the winding pitch, and the coil ends are fixed to each of the above-mentioned terminal pins. .