JP2002008930A - Transformer system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To utilize two differing transformer either as a composite transformer or as a single component. SOLUTION: In a set-up transformer body 41, legs 45a to 45c of an E-shaped core 45 are exposed over its upper surface, and an I-shaped core 43 is assembled on the transformer body 41 to form a set-up transformer 15 as a single component. In a trigger transformer 24, a core made of ferrite material with a winding par is wound by a coil, and it functions independently. Instead of the I-shaped core 43, a lower flange is brought into contact with legs 45a to 45c of the E-shaped core 45, and the trigger transformer 24 is assembled on the set-up transformer body 41, so that a composite transformer as a single component which combines the set-up transformer 15 and the trigger transformer 24 can be obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] 1. Field of the Invention [0002] The present invention relates to a transformer system such as an oscillation transformer and a trigger transformer used for a strobe device.

[0002]

2. Description of the Related Art There is known a film unit with a lens in which an unexposed photographic film is pre-loaded in a unit body incorporating a simple photographing mechanism, and a film unit with a built-in strobe device is also known. This strobe device emits light from a strobe discharge tube by discharging a trigger capacitor in synchronization with opening and closing of shutter blades, and a step-up transformer for boosting a low voltage of a battery to, for example, about 300 V to charge a main capacitor and a trigger capacitor. For generating a trigger voltage of, for example, about 4 kV.

On the other hand, as described in JP-A-61-255006 and JP-A-1-227410,
Using a bobbin integrally formed with two winding sections, one coil section is wound around each coil constituting the first transformer, and the other winding section is wound around each coil constituting the second transformer. Thus, there is known a composite transformer having the first and second transformers as one component.

In the structure disclosed in Japanese Patent Application Laid-Open No. 61-255006, an E-type core is arranged on one side of the winding section of the bobbin, and an I-type core is arranged between the winding sections to form a first transformer. A third magnetic core is formed on the other winding section side with the bobbin hollow or centered on the other winding section side to form a second magnetic path.
Is described in which a step-up transformer and a trigger transformer of a strobe device are used as a composite transformer. As described above, if the two transformers are made into one composite transformer, these can be handled as one component, and there are advantages such as simplification of mounting on a circuit board and space saving.

[0005]

In a film unit with a lens, the specifications of a strobe device vary depending on the type of the film unit, and combinations of the specifications of a step-up transformer and a trigger transformer may be different. That is, even if the specifications of the step-up transformer are the same, the specifications of the trigger transformer are different, or conversely, even if the specifications of the trigger transformer are the same, the specifications of the step-up transformer may be different. In such a case, if the above-described composite transformer is used, the same number of composite transformers as the number of combinations of the step-up transformer and the trigger transformer must be prepared, and the manufacturing process of the composite transformer becomes complicated and irrational. There was a problem that would be.

[0006] Further, when a boosting transformer or a trigger transformer is independently mounted, such as a flash unit of a film unit with a lens which is currently commercially available, the specifications of these transformers are the same as those of the composite transformer. However, a boosting transformer or a trigger transformer having the same specifications as those of the composite transformer must be prepared. Therefore, further complexity of the manufacturing process,
In addition to irrationalization, there is a problem that components such as a bobbin and a core must be prepared separately from the composite transformer.

Further, in the configuration of the composite transformer,
When increasing the capacity of the second transformer, a third core may be used in addition to the bobbin, the E-type core and the I-type core constituting the first transformer, or the number of turns of the second transformer may be increased. It is disadvantageous for simplifying the manufacturing process and reducing the manufacturing cost.

The present invention has been made to solve the above problems, and can simplify and rationalize the manufacturing process for manufacturing transformers of various specifications and mounting forms, reduce the number of parts, and reduce the manufacturing cost. It is intended to provide a transformer system.

[0009]

To achieve the above object, according to the first aspect of the present invention, a first coil comprising a bobbin and at least a first primary coil and a secondary coil wound around the bobbin. A first transformer main body for a first transformer having a portion, a central leg inserted into the bobbin, and an end of each leg exposed at one end surface of the bobbin; An I-shaped core that can be brought into contact with the end of each leg, a plate-shaped core having one surface that can be brought into contact with an end of each leg of the E-shaped core, A second transformer having a wound core having a winding integrally formed on the other surface and a second coil having at least a second primary coil and a secondary coil wound around the winding; Are the system components,
The second transformer is formed so that one surface of the core portion is brought into contact with an end of each leg portion of the E-shaped core so as to form a closed magnetic path of the first coil portion together with the E-shaped core. By assembling with the first transformer main body, it is possible to configure a composite transformer in which the first transformer and the second transformer are integrated, and the I-type core is attached to an end of each leg of the E-type core. The first transformer as a single component can be configured by being assembled to the first transformer main body so as to form a closed magnetic path of the first coil portion together with the E-shaped core by being brought into contact with the E-shaped core. This makes it possible to use the second transformer as it is.

[0010] In the invention according to claim 2, the winding portion of the core with the winding portion is used as the core of the second coil portion. Also,
In the invention described in claim 3, the first transformer and the second transformer are used in a strobe device, and the first transformer is a step-up transformer for stepping up a voltage supplied from a power supply battery. The second transformer is a trigger transformer for applying a trigger voltage to a strobe discharge tube.

[0011]

FIG. 2 shows an example of a film unit with a lens. The film unit with a lens is composed of a unit main body 2 in which various photographing mechanisms are incorporated, and an exterior paper 3 partially covering the unit main body 2. An unexposed photographic film is loaded into the unit main body 2 at the time of manufacture. I have.

On the front surface of the unit body 2, there are provided a photographing lens 4, an object side window of a finder 5, a strobe light emitting section 6, and a strobe operation member 7 for turning on and off a strobe device. In addition, on the upper surface, a shutter button 8,
There are provided a counter window 9 for displaying the number of remaining photographable frames and a display window 10 for displaying the completion of flash charging. Further, on the back side of the unit main body 2, a hoisting knob 11 that is rotated and operated every time one frame is shot is exposed.

In the strobe device, various electric components, a strobe light emitting section 6 and the like are assembled on a printed circuit board to form a unit. FIG. 3 shows an example of a circuit of this strobe device. The strobe device uses, for example, an AA battery 12 as a power source. When the strobe operation member 7 is slid and the charging switch 13 is turned on, the oscillation transistor 14 oscillates by the positive feedback action from the step-up transformer 15. The step-up transformer 15 includes three coils each of which is inductively coupled (hereinafter, referred to as a primary coil, a secondary coil, and a tertiary coil).
16 to 18.

Each of the coils 16 to 18 is connected to a corresponding pin-shaped terminal 19a to 19e.
19e is mounted on the printed circuit board by soldering to the printed circuit board, and is electrically connected to other circuit components.

As the oscillation transistor 14 repeatedly oscillates, the primary current flowing through the primary coil 18 is repeatedly increased and decreased, and an AC voltage is generated at the secondary coil 18. When an AC voltage is generated, the secondary coil 18 allows a secondary current to flow in one direction only through a diode 21 connected to the secondary coil 18 and supplies the current to the main capacitor 26. Thereby, the low voltage of the battery 12 is boosted to, for example, 300 V, and the main capacitor 22 is charged. In addition, the trigger capacitor 23 is charged with the secondary current together with the charging of the main capacitor 22.

The tertiary coil 17 amplifies the amplitude of the base current of the oscillation transistor 14 so that the oscillation of the oscillation transistor 14 can be performed stably until the main capacitor 23 reaches a predetermined charging voltage. Things.

The trigger transformer 24 has a primary coil 25 and a secondary coil 26 inductively coupled to each other. As will be described later in detail, the primary coil 25 is connected to the terminals 27a and 27a.
7b, and to other circuit components via these terminals 27a and 27b. Also, the secondary coil 26
Has one end connected to terminal 27b and the other end connected to terminal 27b.
Used as c.

The primary coil 25 has a synchro switch 2
8, a trigger capacitor 23 is connected. The sync switch 28 is turned on when the shutter is fully opened. When the sync switch 28 is turned on, the electric charge stored in the trigger capacitor 23 is discharged, and this discharge current flows through the primary coil 25. Then, the secondary coil 2
6, a trigger voltage of, for example, 4 kV is generated. This trigger voltage is applied to the strobe discharge tube 31 via the trigger electrode 29 connected to the terminal 27c of the secondary coil 26.
As a result, the strobe discharge tube 31 discharges the electric charge stored in the main condenser 22 therein and emits strobe light. The strobe light is emitted from the strobe light emitting unit 6 toward the subject.

The neon tube 32 is connected to the main capacitor 22 via a resistor, and lights up when the main capacitor 22 is charged to a predetermined specified charging voltage. The neon tube 32 is disposed at a position where the display window 10 is desired.
The photographer can know that the charging is completed by checking the lighting of the neon tube 32 through the display window 10.

The above-described step-up transformer 15 and trigger transformer 24 may be formed as a single unit as a composite transformer integrally combining these transformers, or may be formed as independent units, depending on the type of film unit with a lens (type of strobe device). Is mounted on the printed circuit board of the strobe device. Also, the specifications of each transformer, such as the number of turns of each coil and the turn ratio, differ depending on the specifications of the strobe device, for example, the specified charging voltage and trigger voltage of the main capacitor 22.

FIG. 1 shows the configuration of a transformer system embodying the present invention. This transformer system comprises a step-up transformer main body 41 for the step-up transformer shown in FIG.
The trigger transformer 24 shown in FIG. 1B and the I-shaped core 43 shown in FIG. 1C are used as system components. In addition,
In this example, the boost transformer main body 41 is a first transformer main body, and the trigger transformer 24 is a second transformer.

As shown in FIG.
Comprises an E-shaped core 45, a bobbin 46, and a coil part 47. As is well known, the E-shaped core 45 has a shape having legs 45a to 45c at both ends and a central portion thereof, and is integrally formed of a ferrite material. The bobbin 46 connects the upper flanges 48a and 48b and the lower flange 49 with a trunk 50,
The bases 51a and 51b are integrally formed on the bottom surface of the flange 49. The body 50 has a hollow opening on the upper and lower surfaces, and has two parallel partition plates 52 in the hollow.
a and 52b are provided integrally at a predetermined interval.

FIG. 5 shows the bottom side of the bobbin 46 as shown in FIG.
The pedestal 51a has the three terminals 19a to 19c described above,
The pedestal 51b is provided with two terminals 19d and 19e, respectively, projecting downward. The coil 47 includes a primary coil 16, a secondary coil 17,
It comprises a tertiary coil 18.

The secondary coil 17 is formed by being wound around the outer periphery of the body 50, and both ends thereof are connected to the terminal 19d.
And the terminal 19e. The primary coil 16
The outer periphery of the body 50 is formed by being wound around the upper layer of the secondary coil 17, and both ends thereof are connected to the terminals 19a and 19b. The tertiary coil 27 is formed by being wound around an upper layer of the primary coil 16 on the outer periphery of the body 50, and both ends thereof are connected to the terminal 19 c and the terminal 1.
9d. Note that an insulating layer can be provided between the coils and on the outermost periphery of the coil portion 47 as necessary.

The terminals 19a to 19e are passed through through holes of the printed circuit board when soldering the printed circuit board with the step-up transformer 15 as a single component or a composite transformer in which the step-up transformer 15 and the trigger transformer 24 are integrated. Attached. Thus, the boost transformer 15 or the composite transformer as a single component is fixed to the printed circuit board, and the coils 16 to 18 of the boost transformer 15 are electrically connected to other circuit components.

As shown in FIG. 1, the E-shaped core 45 has a central leg 45b having a partition plate 52a and a partition plate 5a.
2b, the legs 45a, 45c at both ends are arranged on the outer periphery of the coil 47, and the bobbin is so arranged that the ends of the legs 45a to 45c are exposed from between the flanges 48a and 48b, respectively. 46 is assembled from the bottom side. The E-shaped core 45 is fixed to the bobbin 46 with an adhesive or the like.

The step-up transformer main body 41 includes a leg 45
When the I-shaped core 43 or the core 53 with a winding portion described later comes into contact with the ends of the E-shaped core 45a to 45c.
And I-shaped core 43 or E-shaped core 45 and core 5 with winding
3 forms a closed magnetic circuit and functions as the step-up transformer 15.

When the step-up transformer 15 is used as a single component, the bobbin 46 is held in a state where the I-shaped core 43 is in contact with the ends of the legs 45a to 45c exposed between the flanges 48a and 48b. Is fixed with an adhesive or the like. The I-shaped core 43 is formed by forming a ferrite material into a plate shape.

As shown in FIG. 6, the trigger transformer 24
Consists of a core 53 with a winding portion and a coil portion 54. The wound core 53 has a shape in which an upper flange 53a and a lower flange 53b are connected by a cylindrical body 53c as a winding part, and is integrally formed of a ferrite material. The above-mentioned terminals 27a and 27b are provided on the lower flange 53b. The coil unit 54 includes a primary coil 25 and a secondary coil 26 for a trigger transformer.

The secondary coil 26 is formed by being wound around the outer periphery of the body 53c, one end of which is connected to the terminal 27b, and the other end of which is drawn out above the core 53 with the winding as the terminal 27c. Also, the primary coil 25 is
On the outer periphery of c, it is formed by being wound around the upper layer of the secondary coil 26, and both ends thereof are connected to terminals 27a and 27b. Note that, similarly to the step-up transformer main body 41, an insulating layer may be provided between the coils and on the outermost periphery of the coil portion 54.

The trigger transformer 24 functions by itself with the body 53c made of a ferrite material as a core. Since the diameter of the body 53c is increased, and the winding diameter of the primary coil 25 and the secondary coil 26 is increased accordingly, sufficient capacity can be obtained even if the number of turns of each coil 25, 26 is reduced. Can be secured.

When the above-described trigger transformer 24 is used as a single component, the trigger transformer 24 is placed on a printed circuit board with the flange 53b facing downward, and the terminal 27
The terminals 27a and 27b are soldered to lands provided on a printed circuit board, respectively, and the terminals 27c are connected to the trigger electrodes 29 via lead wires or conductive metal plates. Instead of using the other end of the secondary coil 26 itself as a terminal, a pin-shaped terminal is provided similarly to a conventional trigger transformer, and the other end of the secondary coil 26 is connected to the pin-shaped terminal. Alternatively, it may be connected to the trigger electrode 29 via a switch.

The flange 53b of the core 53 with the winding portion is a core for forming a closed magnetic circuit of the step-up transformer 15 together with the E-shaped core 45. That is, when a composite transformer is configured, the flange 53b functions as an I-shaped core of the step-up transformer 15.

When manufacturing a composite transformer in which the step-up transformer 15 and the trigger transformer 24 are integrated, the flange 53b
The trigger transformer 24 is fixed to the upper portion of the step-up transformer main body 41 with an adhesive or the like in a state where the bottom surface of the trigger transformer 24 is in contact with the ends of the legs 45a to 45c of the E-shaped core 45. Thereby, by the contact between the legs 45a to 45c of the E-shaped core 45 and the flange 53b, a closed magnetic path of the step-up transformer 15 is formed by the flange 53b and the E-shaped core 45.

In this example, since the ends of the legs 45a to 45c are arranged at positions slightly lower than the upper surfaces of the flanges 48a and 48b, a convex portion 56 is provided on the bottom surface of the core 53 with a winding. Each of the projections 56 has a leg 45a to 45c of the E-shaped core 45.
And each is in contact. Of course, for example, when the ends of the legs 45a to 45c coincide with the upper surfaces of the flanges 48a and 48b, the bottom surface of the core 53 with the winding portion may be a flat surface, and the ends of the legs 45a to 45c may be flat. Tsuba 4
When projecting from the upper surfaces of the cores 8a and 48b, a groove may be formed in the bottom surface of the core 53 with the winding portion, and the core 53 may be contacted in the groove.

The specifications such as the number of turns of each coil of the boost transformer main body 11 and the trigger transformer main body 12 and the winding ratio are as follows.
Although it is determined according to the specification of the corresponding strobe device, a combination of the boost transformer main body 11 and the I-type core 43 and a combination of the boost transformer main body 11 and the trigger transformer main body 12 are possible regardless of the specification. ing.

Next, the operation of the above-mentioned transformer system will be described. The step-up transformer main body 41, the trigger transformer 24, and the I-type core 43 are manufactured separately.
At this time, regardless of whether the step-up transformer main body 41 and the trigger transformer 24 are mounted as a composite transformer or each transformer is mounted as an independent component, they are manufactured as the same type if they have the same specifications. You.

That is, even when there is a film unit with a lens mounted as a composite transformer and a film unit with a lens in which the step-up transformer 15 and the trigger transformer 24 are mounted as independent components,
For example, if the specifications of these two types of step-up transformers 15 are the same, one type of step-up transformer
1 may be manufactured, and if the specifications of the trigger transformer 24 are the same, one type of trigger transformer 24 may be manufactured.

Also, for example, even when two types of composite transformers are required, if the specifications of the step-up transformers 15 of these composite transformers are the same, one type of the step-up transformer main body 41 and two types of the trigger transformers 24 If the specifications of the trigger transformer 24 are the same, 2
What is necessary is just to manufacture a kind of step-up transformer main body 41 and one kind of trigger transformer 24.

As a result, parts can be efficiently shared for various types of strobe devices having different mounting forms and transformer specifications, and the transformer manufacturing process can be simplified and streamlined. it can.

The manufactured step-up transformer main body 41, trigger transformer 24, and I-type core 43 are classified and stocked for each specification, and are supplied to the next step in response to a request from the strobe device manufacturing process.

Step-up transformer 15 and trigger transformer 24
When there is a request for parts from the manufacturing process of a strobe device in which is mounted as a composite transformer, the boosting transformer main body 15 and the trigger transformer 24 corresponding to the specifications of the strobe device are supplied to the assembling process.

In this assembling step, as shown in FIG. 7, the protrusion 56 on the bottom surface of the trigger transformer 24 is
The trigger transformer 24 is mounted on the upper surface of the step-up transformer main body 41 so as to be fitted between the flange 8a and the flange 48b, and these are fixed.

Thus, the coil portion 47 including the primary coil 16, the secondary coil 17, and the tertiary coil 18 and the terminals 19a to 19 of the coils 16 to 18 are inductively coupled to each other.
e, a step-up transformer 15 including an inductively coupled primary coil 25 and a secondary coil 26, and a trigger transformer 24 including terminals 27a to 27c of the respective coils 25 and 26. The transformer 60 is completed.

As shown in FIG. 8, the cross section of the composite transformer 60 is in a state where the flanges 53 b of the core 53 with the winding portion are in contact with the legs 45 a to 45 c of the E-shaped core 45, and are wound around the body 50. Each of the coils 16 to 18 has a closed magnetic path formed by the E-shaped core 45 and the wound core 53.

The wound core 53 is connected to the I
Since the composite transformer 60 is also used as the mold core, the composite transformer 60 can be configured with a small number of parts. In addition, since the trigger transformer 24 is directly fixed to the step-up transformer main body 41, there is no need to arrange a dedicated I-shaped core in the step-up transformer 15 between the trigger transformer 24 and the step-up transformer main body 41. This is smaller than a conventional composite transformer, which is advantageous in reducing the size of the strobe device and the size of the lens-fitted film unit.

The completed composite transformer 60 is sent to the manufacturing process of the strobe device, and is assembled to the printed circuit board by passing each terminal 19a to 19e through each through hole of the printed circuit board. After this, each terminal 19a to 19e
Are soldered to lands provided around each through hole on the surface of the printed circuit board opposite to the surface on which the composite transformer 60 is provided.

Each terminal 27 of the trigger transformer 24
For a and 27b, for example, one end of a lead wire is connected by soldering, the other end of each of these lead wires is passed through a through hole of a printed circuit board, and is soldered to a land on the opposite surface. Further, the terminal 27c is connected to the trigger electrode 29.

In this way, when mounted as a composite transformer 60, both the step-up transformer 15 and the trigger transformer 24 can be arranged in an area substantially equivalent to one step-up transformer, and between the components. Voids can be reduced. Also, the step-up transformer 15 and the trigger transformer 2
4, the number of steps can be reduced.

Each transformer 15 required by the strobe device,
When the combination of the 24 specifications is different, the combination of the transformers 15 and 24 having different specifications is changed to correspond to the combination, and the composite transformer 60 is manufactured in the same manner as described above. As a result, various composite transformers 60 having different specifications can be easily obtained.

On the other hand, when there is a request for parts from the manufacturing process of the strobe device in which the step-up transformer 15 is mounted as a single component, the step-up transformer main body 15 corresponding to the specification of the strobe device and an I / O common to each specification are provided. The mold core 43 is supplied to the assembling process. In this step, as shown in FIG.
And the flange 48b are fitted and fixed. Thereby, each coil 16-18 of the coil part 47, each coil 1
The step-up transformer 15 as a single component having 6 to 18 terminals 19 a to 19 e is completed.

As shown in the cross section of FIG. 10, in the step-up transformer 15 as a single component, each leg 45a of the E-shaped core 45
The E-type core 43 and the I-type core 43 form a closed magnetic path of each of the coils 16 to 18 wound around the body 50.

The completed step-up transformer 15 is supplied to a manufacturing process of a strobe device, and is assembled on a printed circuit board. As in the case of assembling the composite transformer 60, the terminals 19a to 19e are passed through the through holes of the printed circuit board, and the terminals 19a to 19e are soldered to the lands.

When the step-up transformer 15 is mounted as a single component, the trigger transformer 24 of the transformer system does not necessarily have to be used, and as will be described later, the trigger transformer 24 may be mounted as a single component. Similarly, it is not always necessary to use the step-up transformer 15 of this transformer system.

When there is a request for a component from the manufacturing process of a strobe device in which the trigger transformer 24 is mounted as a single component, the trigger transformer 24 corresponding to the specifications of the strobe device is directly supplied to the manufacturing process of the strobe device. . That is, as shown in FIG. 1C, the trigger transformer 24 is sent to the strobe device manufacturing process in a completed form as a single part.

As shown in FIG. 11, the trigger transformer 24 is mounted on the printed circuit board 6 with the flange 53b facing downward.
2, each terminal 27 a and 27 b is fixed to the land 63 by soldering, and the terminal 27 c is connected to the trigger electrode 29. The terminals 27a and 27b may be bent downward to pass through the through holes.

In the above embodiment, when the trigger transformer is integrated with the step-up transformer to be assembled as the composite transformer 60, each of the terminals indicated by the reference numerals 27a and 27b is connected to other circuit parts via a lead wire. But
For example, these terminals are bent to extend L long downward.
If it passes through the through hole of the printed circuit board as a letter shape, the connecting process of the lead wire can be omitted. In this case, when the trigger transformer is used as a single component, an extra portion of each terminal may be cut before or after assembling.

In the above embodiment, the step-up transformer,
Although the difference in the specifications of the trigger transformer has been described in terms of the number of turns of the coil and the turns ratio, various differences in the specifications such as the number of terminals of the transformer and the number of coils constituting the transformer may be used.

Further, in the above embodiment, the example of the step-up transformer and the trigger transformer for the strobe device mounted on the film unit with the lens has been described.
The present invention can be used for a strobe device mounted on a camera such as a compact camera, and can be used not only for a strobe device but also when two types of transformers are used.

[0060]

As described above, according to the present invention,
A first transformer main body having a bobbin, a first coil portion, and an E-shaped core, a second coil portion, and a wound core in which a winding portion around which the second coil portion is wound is formed integrally with the core portion. Each of the second transformer having the following structure and the I-shaped core is used as a system component, and the second transformer is mounted in a state where the core of the wound core is in contact with the ends of the legs of the E-shaped core. By assembling with the first transformer main body, a composite transformer in which the first transformer and the second transformer are integrated is obtained, and the I-type core is in contact with the end of each leg of the E-type core. Since the first transformer as a single component is obtained by assembling it into one transformer main body, and the second transformer can be used as a single component as it is, the first and second transformers are used as a composite transformer. Case Parts can be shared between the case where the first and second transformers are used as individual parts, and a composite transformer in which the first and second transformers having different specifications are arbitrarily combined can be obtained. Therefore, the manufacturing cost can be reduced, and the manufacturing process can be simplified and rationalized. Further, the number of components constituting the composite transformer can be reduced, and the size of the composite transformer can be reduced.

[0061]

[Brief description of the drawings]

FIG. 1 is a perspective view showing system components of a transformer system embodying the present invention.

FIG. 2 is a perspective view showing an appearance of a film unit with a lens.

FIG. 3 is a circuit diagram showing a circuit of a strobe device built in the film unit with a lens.

FIG. 4 is an exploded perspective view showing a configuration of a step-up transformer main body.

FIG. 5 is a perspective view showing a bottom surface side of a bobbin of the boosting transformer main body.

FIG. 6 is a perspective view showing a configuration of a trigger transformer.

FIG. 7 is a perspective view showing an appearance of a completed composite transformer.

FIG. 8 is a cross-sectional view showing a cross section of the composite transformer.

FIG. 9 is a perspective view showing a completed step-up transformer as a single component.

FIG. 10 is a cross-sectional view showing a cross section of the step-up transformer.

FIG. 11 is a perspective view showing a state in which a trigger transformer is attached to a printed circuit board as a single component.

[Explanation of symbols]

 15 Boost transformer 16-18, 25, 26 Coil 24 Trigger transformer 43 I-type core 45 E-type core 46 Bobbin 53 Core with winding 60 Composite transformer

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) G03B 17/04 H05B 41/02 Z // H05B 41/02 H01F 31/00 A CM

Claims (3)

[Claims] 1. A bobbin, a first coil portion including at least a first primary coil and a secondary coil wound around the bobbin, a central leg inserted into the bobbin, and an end of each leg is connected to the bobbin. A first transformer main body for a first transformer having an E-shaped core exposed at one end surface of the first core, an I-shaped core made to be capable of contacting an end of each leg of the E-shaped core, A plate-shaped core portion whose surface can be brought into contact with each end of each leg of the E-shaped core, and a wound core formed integrally with a wound portion formed on the other surface of the core portion; A second transformer having at least a second primary coil and a secondary coil wound around a winding portion, and a second transformer having a second coil portion as a system component. By contacting the end of each leg, The second transformer is assembled to the first transformer main body so as to form a closed magnetic path of the first coil portion, thereby forming a composite transformer integrating the first transformer and the second transformer. The first transformer may be configured to contact the I-shaped core with an end of each leg of the E-shaped core to form a closed magnetic path of the first coil together with the E-shaped core. A transformer system, wherein a first transformer as a single component can be configured by being assembled to a main body, and the second transformer can be used as it is. 2. The transformer system according to claim 1, wherein a winding portion of the core with a winding portion is a core of the second coil portion. 3. The first transformer and the second transformer are used in a strobe device, and the first transformer is
3. The step-up transformer for stepping up a voltage supplied from a power supply battery, wherein the second transformer is a trigger transformer for applying a trigger voltage to a strobe discharge tube. Transformer system.