CA1199360A - Coilform contact strip of a deflection system for television tubes - Google Patents

Abstract

Abstract of the Disclosure Coilform Contact Strip of a Deflection System for Television Tubes The contact strip is injection-molded in one piece to-gether with the coilform, and the contact members are either slipped into guide grooves provided for in the contact strip, mounted with a flap in the coilform, or injection-molded in the coilform.

Description

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H.Lehner-3 Coilform Contact Strip of a DeFlection System for Television Tubes The invention relates to a contact strip provided with metallic contact members mounted to a coilform of the de-flecting systems for television picture tubes.

Such arrangements for contacting the deflection coils of deflecting systems in television picture tubes are known.
In the prior art arrangements the contact strip is designed as a separate web-shaped plastic part in which U-shaped wire clips are injection-molded. Each such contact strip has two openings with which it is slipped on to two resilient members provided with barbed hooks injec-tion-molded to the coilform, and snapped thereon.

This conventional arrangement for contacting deflection coils of deflecting systems has proved suitable as such.
It is desirable, however, to increase the number of con-tact members on the contact strip and to design it in such a way that the contact members are not only suitable for establishing a soldered connection, but also for the connection oF plugs. Owing to the insufficient stability of the contact pins and of the contact strip~ the prior ar-t arrangement is unsuitable to this end.

It is the object of the invention to design the contact strip on a coilform of deflecting systems for television picture tubes in such a way that besides a more cost-effective way of manufacture there is also achieved a quality improvement in the sense mentioned hereinbefore.

According to the invention, this object is achieved in -.~ 3 that said coilform is of one piece construction and i.s axially slideable onto the neck of a cathode ray -tubei said contact strip is injection molded in one piece with said coil-form, and contact members are mounted on said contact s-trip.

The invention will now be explained with reference to Figures 1 to 4 of the accompanying drawinys, in which:
Figure 1 is a top view on to the rear side of the coil-form, Figure 2 is a sideview of the coilform as shown in Figure ];
Figure 3 shows one type of embodiment of the contact members, Figure 4 shows a further type of embodiment of the con-tact members, and Figure 5 shows a still further type of embodiment of the contac-t members.

Figure 1 shows the rear side of the coilform 1. This rear side of the coilform can be recogniz.ed on the built-in deflecting system, when looking at the rear side of the television picture tube. The neck of the television picture -tube is then positioned in the open-ing 2 of the coilform, and the coilform itself together with the deflecting system is clamped on to the neck of the tube. Figure 2 shows the coilform as shown in Figure 1, but in a side view.
As can be seen from Figures 1 and 2, the contact strips 3 - without the contact members - are injection-molded in one piece toge-ther with the coilform 1 consisting of a plastic material. In the type of embodiment of the contact .Lehner-3 strip 3 as shown in Fig.1, -this is shown to have guide grooves 4. As is evident from Fig.3, such an embodiment of the contact strip 3 is appropriate in cases where con-tact members 5 are used which are of U-shaped design and, at the bottom, are provided with a mouth-shaped opening.
Contac-t members 5 of such design can be easily inserted by machine into the guide grooves 4 of the contac-t strip 30 In cases where the web 6 of the mouth-shaped opening - as is shown in Fig.3, is provided with a barbed hook-shaped end, the slipped on contact members 5 become hooked into one another.

However, the contact members 5 may also be designed in the way as shown ir, Fig.4. This type of contact member is like-wise of U-shaped design and provided on its bottom with a flap 7. In cases where the U-shaped contact member is pro-vided with a flap 7, such contact members S can be inserted with their flap 7 into corresponding openings provided for in the contact strip, and the portions of the flaps pro-jecting on the rear side of the contact strip may be twisted.

In the example of embodiment as shown in Fig.5, however~
the contact members 5 consist of U-shaped pins 8 which are injection-molded into the contact strip 3. This is accomplished, for example, in such a way that a number of wires corresponding to the number of contact members, is inserted in an endless manner into the injection-molding tool. These wires are then coated together with the con-tact strip 3, cut to length, and bent in a U-shaped manner.

Claims (4)

THE EMBODIMENTS OF THE INVENTION IN WHICH AN EXCLUSIVE
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:

1. In a cathode ray tube deflection assembly including a coilform form for a deflection winding, and a contact strip, the improvement wherein:
said coilform is of one piece construction and is axially slideable onto the neck of a cathode ray tube;
said contact strip is injection molded in one piece with said coilform; and contact members are mounted on said contact strip.

2. The assembly of claim 1 wherein:
said contact strip includes guide grooves; and each of said contact members includes a portion adapted to engage one of said guide grooves.

3. The assembly of claim 1 wherein:
said contact strip includes a web shaped portion having openings therein; and each of said contact members includes a portion adapted to be inserted into one of said openings and thereafter deformed so that each said contact member is supported on said contact strip.

4. The assembly of claim 1 wherein:
each of said contact members is a pin which is injection molded in said contact strip.