JPS5940724Y2 - Trance - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to improvements in transformers among electronic components constituting an electronic flash device.

2. Description of the Related Art Various types of electronic flash devices that are miniaturized for portability and flash camera devices that integrate a coulometric flash device and a camera have been put into practical use.

Nowadays, the former type of electronic flash device is required to be more compact, and the latter type of flashmatic camera device as well, when the electronic flash device is built into the camera, the device itself becomes larger, so the proportion of the built-in electronic flash device is reduced as much as possible. There is a strong desire to reduce the size of the device, and at the same time, there is a strong desire to reduce the cost of the device itself.

As a result of considering the above-mentioned demands, the present applicant has developed a technology to integrate and flatten electrical components such as resistors, capacitors, semiconductors, etc. that make up the electrical circuit of an electronic flash device using hybrid thick film technology, thereby miniaturizing and reducing costs. I tried to measure it.

However, as is well known, the electrical components of electronic flash devices include transformers called converter transformers that boost the voltage of a low voltage source and trigger transformers that generate trigger pulses that trigger flash discharge tubes. Since these transformers cannot be integrated using hybrid thick film technology, the effects of integration and flattening of other components as described above cannot be fully utilized.

In other words, the above-mentioned transformers are generally completed by using manufactured parts such as core bobbins and coils, so it is impossible to integrate them using the hybrid thick film technology as mentioned above, and the coil windings are also difficult to integrate. Due to constraints caused by the method and the shape of the core itself, the shape is close to a regular cube, making it difficult to downsize and reduce costs.

In other words, for example, among transformers, a converter transformer has a single-layer coil to which a large current is supplied from a low-voltage power supply via a transistor, and a converter transformer that converts the voltage of the low-voltage power supply to 300 to 4
It is mainly composed of a group of coils such as a secondary coil for boosting the voltage to a high voltage of 00V, and an auxiliary coil for driving the above-mentioned transistors, etc.The winding method is usually to first install a wire with a diameter of several tens of micrometers on a bobbin. The next coil is wound on top of the iooom, and the auxiliary coil and second coil are wound on top of it to the same extent.

In addition, the trigger transformer consists of a single-layer coil in which the energy of a capacitor in which trigger energy is stored is discharged via a switch, and a secondary coil that boosts the energy consumed in this secondary coil to several tens of KV.
As with the converter transformer, the winding method is usually such that the two coils described above are wound one on top of the other.

For this reason, the shape inevitably became large, and the effect of miniaturization by hybrid thick film technology for other parts was prevented.

Further, normally, when the coils are wound one on top of the other as described above, an insulating member is required to insulate the coils, leading to an increase in cost.

The present invention was made taking into consideration the points mentioned above.
The coils that were previously wound one on top of the other are wound separately, and the single-layer coil, which has an extremely small number of turns compared to the secondary coil, is wound in a single layer, making the entire transformer thinner and even with the same number of turns. Thin type that allows you to shorten the length of the coil used and also makes it extremely easy to wrap the curls.
The purpose is to provide an inexpensive transformer and fully utilize the integration effect of other components using hybrid thick film technology.

Hereinafter, the transformer according to the present invention will be described with reference to the drawings.

FIG. 1 is an exploded vertical sectional view showing an embodiment of the transformer according to the present invention, in which 1 is a bobbin around which a coil such as a primary coil is wound, 2 is a secondary coil 3 is a primary coil,
4 is an auxiliary coil; 5 and 6 are three recesses in the bobbin 1 forming tanks a, b, and c; the separation wall I is a lower core having a magnetic core 8; 10 is a through hole through which the magnetic core 8 of the lower core I passes. The husband is showing.

As is clear from FIG. 1, the bobbin 1 is separated into three tanks a, b, and c by separation walls 5 and 6, with the secondary coil 2 in tank a and the primary coil 3 in tank b. However, the auxiliary coil 4 is wound around the C tank, and then the magnetic core 8 of the lower core 7 is passed through the through hole 10 of the bobbin 1, and a magnetic path is formed between it and the upper core 9. The transformed transformer is completed.

Incidentally, the separation walls 5 and 6 are integrally formed with the bobbin 1 as described above, and needless to say have an insulating effect.

Therefore, simply by winding each coil around the corresponding one of the bobbin 1, dielectric breakdown and short circuit can be completely prevented.

Also, when looking at the configuration of the separation walls 5 and 6 that form various types of a @ b * C on the bobbin 1, the limits of the separation walls 5 and 6 that form the b tank and the c tank, and the separation wall 6 and The gap between the bobbin 1 and the lower part thereof is approximately equal to the wire diameters of the coils used as the secondary coil 3 and the auxiliary coil 4.

Therefore, the secondary coil 3 and the auxiliary coil 4 are wound in a single layer in the B tank and C tank of the bobbin 1 as shown in the figure.

Let us now consider the above-mentioned single-layer winding of the primary coil 3 and the auxiliary coil 4, which is a major feature of the present invention.

First, if we think about the winding process, we can see that by winding the coil along the separation walls 5 and 6, the primary winding 3 and auxiliary coil 4 of the transformer can be naturally formed. It is clear from the way 6 is set up,
Needless to say, this curling work is a very simple work that is suitable for mass production.

By the way, considering the single-layer winding itself, if the number of turns is the same, the diameter of the rolled-up state will naturally be larger than when winding to form a plurality of layers at a predetermined diameter.

The above-mentioned primary coil 3 and auxiliary coil 40 are wound in a single layer.
Considering the number of turns, it is extremely small compared to the 20 turns of the secondary coil, so in the wound state, the effect of being able to wind it thinly as in the present invention is greater than that of increasing the diameter. This means that it can be applied to the integration of other parts using hybrid thick film technology.

In other words, when considering the case where transformers are adapted to electrical components such as resistors integrated using hybrid thick-film technology, it is extremely important not only to miniaturize the entire device, but also to make it thin. The above-mentioned single-layer winding of the present invention is an extremely effective means for reducing the thickness.

Furthermore, when considering the length of the coil to be used, it is definitely shorter than when winding the secondary coil, secondary coil, and auxiliary coil overlapping each other, and the insulation effect of the separation walls 5 and 6 mentioned earlier Coupled with the fact that there is no need to use a separate insulator, costs can be reduced.

FIG. 2 is an exploded longitudinal cross-sectional view showing another embodiment of the transformer according to the present invention. In the figure, parts with the same numbers as those in FIG. 1 have the same functions.

This embodiment is intended to be thinner than the embodiment shown in Fig. 1 and to improve work efficiency.
The auxiliary coil shown in is printed on the insulating substrate 11,
This is configured as a printed coil 12.

Therefore, the bobbin 1 is wound with the secondary coil 2 and one layer of the coil 3, and there are two tanks formed, tank A and tank B, as shown in the figure, and of course the separation wall is shown by number 5 in the diagram. One separation wall is enough.

Therefore, the manufacturing and cost of the bobbin 1 itself is reduced, and the work of winding the secondary coil 2 and the secondary coil 3 described above is easier than in the embodiment shown in FIG. 1. Furthermore, the auxiliary coil 12 is printed, so naturally it can be made thin as a whole, and can be fully adapted to other electrical components integrated using hybrid thick film technology.

The transformer shown in Figure 2 has the above-mentioned tanks a and b.
The bobbin 1 with each coil wound around the tank is placed on the insulating substrate 11 on which the printed coil 12 is applied.1. Needless to say, the magnetic core 8 of the lower core 7 is inserted through the through hole 13 of the insulating substrate 110 and the through hole 10 of the bobbin 10 and brought into close contact with the upper core 9 to complete the process.

The embodiments of the transformer according to the present invention have been described above with reference to FIG. 1 and FIG. Although it is compatible with transformers, it is only necessary to remove the above auxiliary coil for the trigger transformer.
It is clear that a configuration including a similar two-layer coil winding can be used, and the explanation will be omitted.

However, the trigger transformer normally generates a high-frequency attenuation motion of about 0.5 to 2 MHz, and the lower core 7 and upper core 9 described above are not particularly necessary, and only the coil group can sufficiently excite one photodischarge tube. High pressure can be generated.

As described above, the present invention eliminates the need for special insulating members by winding the coils such as the secondary coil and the secondary coil around the bobbin tank formed by the separation wall integrally formed with the bobbin. , and by configuring the gap in the tank formed by the separation wall to be approximately equal to the wire diameter of the coil used, any coil can be wound in a single layer, thereby providing a transformer that can be configured extremely thinly,
In electronic flash devices, etc., when electrical components such as resistors and semiconductors are integrated using hybrid thick film technology, the effect of this integration can be fully utilized due to the thinness described above, which has extremely high practical value. It is.

[Brief explanation of drawings]

FIGS. 1 and 2 are exploded longitudinal sectional views showing embodiments of a transformer according to the present invention, respectively. 1...Bobbin, 5, 6...Separation wall, 7
...Lower edge core, 8...Magnetic core, 9...
...Upper core, 10...Through hole, 11...
...Insulating board, 12...Printed coil, 1
3...Through hole.

Claims (2)

[Scope of utility model registration request] (1) A bobbin is provided with a plurality of recesses separated by a separation wall having an insulating effect, a coil is wound in each of these recesses, and the width of at least one recess is set to a predetermined wire diameter of the coil. The transformer consists of a single layer of coils that are wound approximately equally in this recess. (2) The transformer according to claim 1 of the utility model registration claim, characterized in that the second coil is wound in a single layer.