DE7026703U - UNIT FOR HIGH VOLTAGE. - Google Patents

Description

The invention relates primarily to structural units for high voltage, in particular to those on picture tubes for television sets and to arrangements for high voltage of a similar type.

In recent times, to generate the very high voltage on picture tubes, combined network units, which contain rectifier elements and capacitors, with associated cable connections have been used, which in some respects cannot be satisfactory.

For voltages of around 30,000 volts, parts come into question that, when assembled tightly, act as voltage multipliers in so-called. Cascades (step groups) have to work. Here, too, there is (as is often the case) the requirement for spatial dimensions that are as compact as possible, with the problem of cooling playing an essential role.

In view of the very rapid progress in the field of dry rectifiers, in particular rod-shaped selenium rectifiers, with progressive downsizing there are some things that bring the problem of operational safety - even with excessive temperatures and disruptive chemical reactions - to the fore.

If deficiencies and failures occur in the contaminated parts of the cascade groups, their elimination is very difficult in the responsible departments, or, in most cases, cannot be carried out because soldering in places that are difficult to access must not be risked.

The aim of the invention is therefore to eliminate these inhibiting disadvantages in the particularly endangered groups of high voltage, which, for reasons of absolute safety, are hardly accessible to technical improvements of the heavily loaded device standards. Accordingly, errors and failures of units must be expected in practice, with the adaptation to this finding being the focus of the present invention.

The unit for high voltage in the application for picture tubes thus represents a unit which (inevitably) is provided (or loaded) with cable connections for different currents and voltages, with additional connection parts on these cables (according to the current views!) A "safe" must have firmly soldered connection. This fixed form of connections and connections is based on the false assumption that security can only be achieved in this way.

The structural unit for high voltage, in particular for picture tubes with a cable connection to the connection parts of the picture tube according to the invention, is characterized in that one or more cable connections on the structural unit are designed as detachable plug-in contacts. For this purpose, the structural unit according to the invention has contact sockets at one or more connection points, which interact with, for example, tubular contact parts on the cables of the supply lines and form detachable plug connections.

Without any fundamental dismantling, there is thus the simple possibility of testing faulty connecting parts or the entire component separately or replacing them, so that testing or replacement (without special tools) can be carried out on the spot. The separation of the cable connection is done, for example, in the simplest way by pulling out the cable.

According to one feature, the contact sockets are inserted somewhat recessed on the structural unit, so that there is no possibility of contact from the outside.

The structural units according to the invention also have further advanced features in their arrangement and design, which are explained in more detail below. Two exemplary embodiments are described on the basis of the figures, with further features also representing a further development of the invention on the basis of the figures.

1 shows a unit for high voltage with a multiplier cascade and connection sockets, FIG. 2 shows a unit constructed as a roundabout with a multiplier cascade and connection sockets of your choice.

The structural unit according to FIG. 1 shows that the capacitors 5-5 (four capacitors) and the rod rectifiers 6-6 in the flat structure on the holder 1 have a so-called. Form a multiplier cascade (or a group for increasing the voltage). The combination of the parts is known per se, but the effect of the arrangement and its safety is largely dependent on the arrangement, which is carried out here in full consideration of all circumstances.

The flat structure (1) is secured against external influences by a potting compound (e.g. resin), whereby the air holes 7-7 between the rectifiers 6-6 are used for ventilation and cooling. In this arrangement, the alternating voltage is input at the connection or at the socket 3. After a full cycle, rectification and voltage multiplication, the high voltage at the contact socket 2, which is designed as a plug contact, can be taken by means of the cable connection K. In a simple manner, the cable end is provided with a tubular contact sleeve, so that reliable contact is made by inserting the cable. (2)

A lower DC voltage (focusing and the like) -4 can advantageously be transmitted in the same way via a plug contact to a cable connection, this connection also being easily detachable via plug contacts. In some cases contact sockets are provided with a plug-in contact for the rectified voltage (connections 2 and 4), so that a solderable contact is selected at connection 3 (which is not so susceptible).

As shown in Fig. 1, the holder 1 can be supplemented below with fastening by feet 8-8, solder pins for printed circuit boards can be provided as well. If you choose, hook feet that engage resiliently in the base plate can also be advantageous. Overall, a very small and manageable structural unit with a very sufficient cooling surface is achieved which, in addition, can easily be replaced by the means according to the invention. The unit is ideal for all types of television sets and makes it much easier to set up the high-voltage power supply.

In another construction, a cylindrical basic shape, which is shown in Fig. 2 as a plan view, can be selected according to the invention. The problem here is to still achieve particularly effective cooling of the elements with a clear structure (and small dimensions).

The focus of the arrangement is the assembly body 11, made of insulating material or plastic, which at the same time acts as a carrier and insulator for the adjacent parts in a new way. As can be seen in FIG. 2, the assembly support 11 has an almost cylindrical surface area provided with indentations, which is at the same time particularly advantageous for holding and fastening the parts. The highly stressed elements, such as selenium rod rectifiers 16, are arranged in corresponding indentations of the carrier 11 - on its inner surface - in such a way that they lie directly on the central air and cooling passage 17 and are effectively cooled by ventilation.

The construction of the structural unit takes place here as a rondelle around the carrier 11 (outside the outer sleeve), so that during the assembly an assembly coil is created that is easily accessible from all sides and forms a handy unit.

After insertion into the outer sleeve, the structural unit can advantageously be potted with cast resin (or the like), whereby the connection contacts for the voltages 12-14-13 and associated contact devices such as sockets can be permanently inserted in the cast resin. As in the first example, it is advantageous to equip the high voltage and the control voltage (focus, etc.) with sockets (12) for receiving contact plugs, thus for easily detachable connections. Capacitors 15-15 lying up to the outside of the roundabout - likewise in indentations of the carrier 11 - have an easily accessible, cooled layer in the same way, so that an optimal arrangement of all parts is achieved in every respect. There are also further air passages 17 inserted within the potting compound. It is advantageous to design the inner passage 17 as an inner tube, advantageously in such a way that the good air supply at the lower end is achieved by spacing.

As shown in these two exemplary embodiments of the invention, the obstructive dangers of failure and interference in the high voltage area are eliminated in the most effective manner with the means according to the invention, which counteract the failure of the high voltage, so that all units and connections can be checked immediately (and, if necessary, substitution 1) is easily possible.

The invention promotes not only technical but also economic concerns in the field of high-voltage units, with an acceleration and improvement of repairs and safety being achieved.

Claims (6)

1. Unit for high voltage, especially for picture tubes, as a cascade arrangement for voltage increase and rectification, characterized in that one or more cable connections on the unit (which lead to the picture tube) are designed as detachable plug contacts with contact sockets (2-3-4 Fig. 1) are. 2. Assembly according to claim 1, characterized in that the associated cable ends are provided with plug contacts (e.g. tubular sleeves). 3. Unit for high voltage as a cascade arrangement according to claims 1-2, characterized in that the cable connections (sockets 2-3-4) are arranged essentially in the upper part of the unit, further characterized in that the unit with the cascade arrangement is easily exchangeable . 4. The structural unit as claimed in claims 1-3, characterized in that the cascade arrangement as a whole has a cylindrical structure, for example with a central holder (11) which has a jacket provided with indentations. 5. Assembly according to claims 1-4, characterized in that continuous air openings (7-17) are provided for cooling, preferably in the area of the dry rectifier (6-16). 6. Unit with a cascade arrangement for high voltage according to claim 1-3, characterized in that the contact sockets (2-3) are embedded in the potting compound, further characterized in that they are inserted somewhat recessed (Fig. 1).