DE6950356U - HOLDER FOR THE CONVERGENCE MAGNETS ON A MULTI-BEAM COLOR TUBE. - Google Patents

Description

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Licentia Patent-Verwaltungs-GiabH

6 Frankfurt / Main 70, Theodor-Stem-Kai 1

Hanover, December 18, 1969 PT-lip / bü Η 69/103

Bracket for the convergence magnets on one

tube

In the case of multi-beam color picture tubes, for example the shadow mask tube, in the fire receiver, a convergence magnet is arranged on the tube neck for each electron beam, and its pole pieces are in contact with the tube neck. The convergence magnets are attached, for example, to a plate surrounding the neck of the picture tube. So that the pole pieces always rest close to the neck of the picture tube, the convergence magnets are resiliently arranged radially to the neck of the picture tube. This is achieved, for example, by using springs.

The innovation relates to a particularly simple holder for such Convergence magnets. The innovation is that: the holder consists of a box-shaped, the magnets receiving on the carrier is loosely resting receiving part, which is resilient at its four corners via part-circular, radially to the picture tube neck Bracket is connected to holding parts attached to the carrier.

The manufacturing support of the bracket according to the innovation is special simply because the entire bracket can be manufactured as a plastic injection-molded part. In addition, there is a flawless Shift in the radial direction without the risk of tilting.

The innovation is explained using the drawing. 1 shows the arrangement of the convergence magnets on the neck of the picture tube, 2,3 the design of the holder.

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- 2 - H 69/105

1 shows the basic principle of a convergence device for a three-beam color picture tube. There each of the three electron beams R ₉ G ₉ B is guided through a pair of poles 1, 2, 3, which are fed through the tube neck 4 by the convergence magnets 5 »6.7 magnetic fields. Through these magnetic fields, which can act both statically and dynamically, the individual electron beams are shifted in the directions of the arrows. The magnets 5, 6, 7 are arranged on a plate 8 surrounding the picture tube neck 4 so as to be resiliently displaceable in the radial direction 9 such that the pole pieces of the magnets always rest on the tube neck 4.

Fig. 2 shows the trained according to the innovation holder of the convergence magnets on the plate 8. The U-shaped magnets 5-7 are inserted into a box-shaped receiving part 10 in the direction 11 through bores 12 and through receiving shafts 13 therethrough. The convergence coils 19 (FIG. 1) lie in the chambers 16, 17 and around the ends of the shafts ka »13. The receiving part 10 is stored flat on the plate 8 without being fastened. On the plate 8 holding parts 14 are attached. The corners of the receiving part 10 are each connected to one end of the holding part 14 via a resilient bracket 15. Preferably, the receiving part 10, the holding part 14 and Bracket 15 made as a uniform plastic injection-molded part. the Brackets 15 cause a resilient mounting of the receiving element 10 on the plate 8 in the sighting 11 »because the bracket I5 on all attack four corners of the part 10, a perfect guidance in the direction of arrow 11 is achieved without significant tilting. The holding parts 14 can also be provided with contact pins. The plate 8 is preferably a printed circuit board,

exhibits. The shafts 13 are provided with constrictions 18 at the end resting on the picture tube neck 4, which stop for the ends of magnets 5-7 and prevent the relative hard cores lie on the glass of the neck of the picture tube.

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- 3 - H 69/103

The holder is arranged on the plate 8 so that when the tube neck is not inserted, the follower shoes of the magnets 5-7 form a circle, the diameter of which is slightly smaller than the minimum diameter of the picture tube neck, when the plate 8 with the magnets 5-7 is attached The magnets 5-7 are then pushed onto the tube neck through the tube neck against the spring action of the bracket 15 radially outward. The spring travel achieved by the bracket 15 is so great that tolerances in the diameter of the picture tube neck are compensated for.

695

Claims (2)

- 4 - H 69/103 protection claims 1. Holder ang for the convergence magnets on a Mei ^ iststrahl color picture tube, in which di, s convergence magnets are mounted on a support arranged on the neck of the picture tube so as to be resiliently displaceable radially to the neck of the picture tube, characterized in that the holder consists of a box-shaped, the magnets (5- 7) the receiving part (10) lying loosely on the carrier (8) consists of φ which is connected at its four corners via part-circular, radially to the picture tube neck (4) resilient brackets (15) with holding parts (14) attached to the carrier (8) . ^ / 2. Arrangement according to claim 1, characterized in that the receiving part (10), bracket (15) and holding part (14) are made as a single plastic injection-molded part // 3 «Arrangement according to claim 1, characterized in that the neck parts (14) contain / 4. Arrangement according to claim 1, characterized in that the carrier is a plate (8) which surrounds the picture tube neck (4) and its plane is perpendicular to the picture tube axis. 5ο bracket according to claim. 4, characterized in that the plate (8) is provided with printed conductor tracks on its side opposite the convergence magnets (5-7). t / 6ο bracket according to spoke 1, characterized in that the. Brackets (15) have a semicircular shape, the open ends of which point approximately radially to the picture tube axis.