JPH0419772Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a two-stage step-up transformer used in strobe devices and the like.

[Conventional technology]

Camera strobe devices incorporate two types of step-up transformers: an oscillation transformer and a trigger transformer. Both of these transformers have the function of the oscillation transformer boosting the power supply voltage to, for example, 350 volts and outputting it to the trigger transformer, which then boosts the voltage to, for example, 5 kilovolts, and is known as a two-stage step-up transformer. .

Conventionally, oscillation transformers and trigger transformers each use a coil wound around the shaft of a synthetic resin bobbin with a plurality of protruding metal terminals, and a core disposed within the shaft. Both transformers, which were formed separately in this way, were mounted in their respective predetermined positions. Here, since the trigger transformer has a smaller diameter than the oscillation transformer,
Although it is possible to improve the space factor by winding the coil directly onto the core without using a bobbin, it is extremely difficult to protrude a metal terminal from the ferrite core of the trigger transformer, so it is difficult to use a bobbin. The use of is considered unavoidable.

[Problem that the invention attempts to solve]

However, in the conventional two-stage step-up transformer described above, the oscillation transformer and trigger transformer are formed separately, which increases the number of assembly steps, and furthermore, both transformers are relatively large components. Therefore, there was a problem that the implementation work became complicated. In addition, since a special bobbin is used for the trigger transformer, the number of parts increases, which hinders high-density mounting, and there are other problems that need to be improved.

Therefore, in order to simply integrate the oscillation transformer and the trigger transformer, which were conventionally formed separately, by using a common bobbin so that the respective coil winding axes are parallel, we decided to A conceivable configuration is to integrate both transformers by connecting the side plates of the bobbin covering the transformers, but with this configuration, it is not possible to wind the coils of both transformers in a manner suitable for mass production.

The present invention was developed in view of the above points, and its purpose is to provide a two-stage step-up transformer that can reduce assembly man-hours, facilitate mounting work, and improve mounting density. There is a particular thing.

[Means for solving problems]

To achieve the above object, the present invention includes a first transformer, such as an oscillation transformer, that boosts the input voltage, and a second transformer, such as a trigger transformer, that further boosts the output voltage of the first transformer. A two-stage step-up transformer consisting of a transformer, which is a non-magnetic support made of synthetic resin or the like that is integrated with a bobbin around which the coil of either the first or second transformer is wound. For example, an extending portion having a recessed stepped portion may be provided, and the extending portion may sandwich the other transformer so that the coil winding axes of the first and second transformers are parallel to each other. A metal terminal is provided protruding from the support body, and the lead-out terminal of each coil of the two transformers is connected to the metal terminal.

[Effect]

According to the above means, for example, in the case of an oscillation transformer and a trigger transformer in a strobe device, the side plate of the bobbin of the oscillation transformer corresponding to the first transformer, or the frame holding this bobbin, etc., is attached to the second transformer. By providing an extension for mounting the corresponding trigger transformer, a two-stage step-up transformer that integrates both of these transformers can be obtained. In comparison, the number of assembly steps can be reduced, and since this integration improves handling, mounting work can be easily performed.

〔Example〕

Hereinafter, embodiments of the present invention will be described in detail based on the drawings.

1 and 2 relate to an embodiment of the present invention, in which FIG. 1 is a perspective view of a two-stage step-up transformer for a strobe, and FIG. 2 is a sectional view thereof.

This two-stage step-up transformer consists of an oscillation transformer and a trigger transformer, and the reference numeral 1 in the figure comprehensively indicates the oscillation transformer, 2 its coil, and 3
5 and 6 are the side plates of the bobbin 3 that support both ends of the shaft 4, and 5a and 6a are the side plates of the side plates 5 and 6, respectively. The extension part, 8 is the core, while the code 9 comprehensively indicates the trigger transformer, 10 is the coil thereof, 11 is the core around which the coil 10 is wound,
This core 11 is inserted into a predetermined position within the bobbin 3 along the stepped portions 5b and 6b formed on the extending portions 5a and 6a, respectively.
It is supported and fixed between 6a. Further, the bobbin 3 is provided with a protruding metal terminal 12 for connecting the lead portion 2a or 10a of the coil 2 or 10 for conduction to the outside, and each coil 2 or 10 is provided with two conductive wires. There are a total of eight metal terminals 12 on the bobbin 3.
is provided.

The two-stage step-up transformer having the above configuration has side plates 5 and 6 of the bobbin 3 for the oscillation transformer 1 extended, and an extension part 5 for supporting and fixing the trigger transformer 9.
By providing transformers a and 6a, both transformers 1,
9 is integrated, and all the metal terminals 12 for external lead-out are protruded from this bobbin 3, so there is no need for a bobbin dedicated to the trigger transformer, which reduces the number of parts and makes mounting easier. Since the work only needs to be done once, the number of assembly steps can be reduced compared to the case where the oscillation transformer and the trigger transformer are formed separately and mounted separately. Also,
If the oscillation transformer and trigger transformer are formed separately, each component is relatively large and the mounting work becomes complicated.
If both transformers 1 and 9 are integrated as in this embodiment, handling is improved and mounting work can be easily performed. Furthermore, by integrating both transformers 1 and 9, the space factor is improved, so
It is also possible to increase the packaging density.

In the above embodiment, the coil 10 of the trigger transformer 9 is wound directly around the core 11, and this is installed between the extensions 5a and 6a of the bobbin 3, but if necessary, a synthetic resin bobbin may be used. The coil 10 may be wound around the bobbin, and the bobbin may be installed between the extension parts 5a and 6a.

Further, in the above embodiment, only a two-stage step-up transformer that is a combination of an oscillation transformer and a trigger transformer for a strobe is described, but it goes without saying that the present invention is also applicable to other two-stage step-up transformers. .

[Effect of idea]

As detailed above, in the two-stage step-up transformer according to the present invention, the first transformer and the second transformer are integrated, for example, the oscillation transformer and the trigger transformer are integrated using the bobbin of the former. Since the metal terminals are integrated through a common support and are electrically connected to the lead portions of the coils of both transformers and protrude from the support, the number of parts and assembly man-hours can be reduced. , has excellent mass productivity, and because it is integrated via a non-magnetic support, there is no magnetic interference between both transformers, and the handling and space factor are improved.
It has various effects, such as making mounting work easier and enabling high-density mounting.

[Brief explanation of the drawing]

The drawings relate to an embodiment of the present invention, in which FIG. 1 is a perspective view of a two-stage step-up transformer for a strobe, and FIG. 2 is a sectional view thereof. 1...Oscillation transformer, 2,10...Coil, 2
a, 10a...Lead part, 3...Bobbin, 4...
Shaft portion, 5, 6...Side plate (support body), 5a, 6a...
...Extending portion, 8, 11...Core, 9...Trigger transformer, 12...Metal terminal.

Claims (1)

[Claims for Utility Model Registration] (1) A first transformer that boosts the input voltage, and a second transformer that further boosts the output voltage of the first transformer.
a non-magnetic support integrated with a bobbin around which the coil of either the first or second transformer is wound, and a metal terminal protruding from the support. The extending portion extending from the support body clamps the other transformer so that the coil winding axes of the first and second transformers are parallel to each other, and each coil of the two transformers is drawn out. A two-stage step-up transformer whose terminals are connected to the metal terminals mentioned above. (2) The two-stage step-up transformer according to claim 1, wherein the first and second transformers are an oscillation transformer and a trigger transformer, respectively. (3) A two-stage step-up transformer according to claim 1 or 2 of the utility model registration, in which the other transformer is sandwiched by a stepped portion recessed in the extending portion of the support. (4) The two-stage step-up transformer according to claim 1 or 3, wherein the support integrated with the bobbin is made of synthetic resin.