EP0250822A2 - Tube d'image avec unité de déviation - Google Patents

Tube d'image avec unité de déviation Download PDF

Info

Publication number
EP0250822A2
EP0250822A2 EP87107142A EP87107142A EP0250822A2 EP 0250822 A2 EP0250822 A2 EP 0250822A2 EP 87107142 A EP87107142 A EP 87107142A EP 87107142 A EP87107142 A EP 87107142A EP 0250822 A2 EP0250822 A2 EP 0250822A2
Authority
EP
European Patent Office
Prior art keywords
picture tube
deflection unit
ring
neck
thermoplastic material
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP87107142A
Other languages
German (de)
English (en)
Other versions
EP0250822B1 (fr
EP0250822A3 (en
Inventor
Heinz Lehner
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nokia Deutschland GmbH
Original Assignee
Nokia Deutschland GmbH
Standard Elektrik Lorenz AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nokia Deutschland GmbH, Standard Elektrik Lorenz AG filed Critical Nokia Deutschland GmbH
Publication of EP0250822A2 publication Critical patent/EP0250822A2/fr
Publication of EP0250822A3 publication Critical patent/EP0250822A3/de
Application granted granted Critical
Publication of EP0250822B1 publication Critical patent/EP0250822B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J29/00—Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
    • H01J29/46—Arrangements of electrodes and associated parts for generating or controlling the ray or beam, e.g. electron-optical arrangement
    • H01J29/82—Mounting, supporting, spacing, or insulating electron-optical or ion-optical arrangements
    • H01J29/823—Mounting, supporting, spacing, or insulating electron-optical or ion-optical arrangements around the neck of the tube
    • H01J29/826—Deflection arrangements

Definitions

  • the invention relates to a picture tube with a deflection unit fastened thereon according to the preamble of claim 1.
  • the deflection unit for a picture tube sits on the picture tube neck and lies against the cone of the picture tube. After the deflection unit has been mounted on the picture tube, it must be precisely adjusted with respect to the picture tube so that a perfect image is obtained. Then the deflection unit must be attached to the picture tube so that it can no longer move. When attaching the deflection unit to the picture tube, the pressure and the temperature must not be too high or too high, as this can damage the picture tube.
  • the deflection unit on the picture tube can be mechanical or attached by gluing.
  • the deflection unit can be attached to the picture tube with a clamp that can be tightened by a screw. When the screw is loosened, the deflection unit can be moved on the picture tube neck and after adjustment, the deflection unit can be fixed by tightening the screw.
  • excessive pressure must not be applied to avoid cracking of the picture tube neck.
  • a suitable adhesive must be introduced between the deflection unit and the picture tube. This is difficult and usually requires special channels to apply the adhesive.
  • a cold-curing adhesive has the advantage that the temperature effect on the picture tube is low, but the disadvantage that on the one hand the adjustment process must be completed before the adhesive hardens, and on the other hand the deflection unit must be held in position until the adhesive has hardened.
  • the softening temperature When using a heat-softening adhesive, the softening temperature must not be too high to avoid impairing the picture tube. On the other hand, when the picture tube is in operation, it must not heat up so much that the adhesive softens and the deflection unit shifts.
  • thermoplastic material are to be cemented between the deflection unit and the picture tube, which connect the two parts to one another.
  • a hot glue with a melting temperature of around 150 ° C is used for this.
  • the picture tube must be kept at 50 ° C when applying the hot glue.
  • the deflection unit must also be provided with corresponding channels into which the hot glue can be introduced.
  • DE-OS 25 51 288 it is also known to attach a deflection unit on a picture tube in such a way that a ring is first attached to the cone of the picture tube by means of an adhesive, which has four hollow approaches.
  • the deflection unit is provided on its circumference with radially outwardly projecting flags and is used with these in hollow formations of a second annular plastic part and both parts are then placed together on the pins of the first, glued-on annular part and connected to one another by filling in an adhesive.
  • This embodiment requires several complicatedly shaped parts that have to be connected to one another.
  • the object of the invention is to fasten a deflection unit on a picture tube with a few simple parts quickly and safely.
  • a ring made of thermoplastic material is first attached to the picture tube neck.
  • the attachment can be done by gluing, for example by means of a so-called double-sided adhesive tape.
  • a cold-curing adhesive can also be used for this, since the fastening of the ring is independent of the adjustment of the deflection unit.
  • the deflection unit itself has a tubular extension formed on its coil former from the same thermoplastic material from which the ring attached to the tube neck is made. It is preferably an amorphous or partially crystalline thermoplastic.
  • the deflection unit is now pushed over the tube neck until the tubular extension comes to rest on the ring attached to the tube neck.
  • the deflection unit can now be moved in the longitudinal direction in an adjusting device and also rotated until it has reached its optimal position. Now, by means of a short welding process, preferably by spot welding, the ring sitting on the tube neck is welded to the tubular extension of the coil body of the deflection unit, as a result of which the deflection unit is immediately firmly seated relative to the picture tube.
  • the deflection unit 4 is partially seated on the picture tube neck 2 and partially abuts the picture tube cone 3.
  • the coil body 5 of the deflection unit 4 has a tubular extension 6, which consists of thermoplastic material.
  • the material is preferably an amorphous or partially crystalline thermoplastic.
  • a ring 7 made of the same thermoplastic material as the extension 6 is attached to the picture tube neck 2, preferably by gluing.
  • the ring 7 made of thermoplastic material is attached to the tube neck 2 by gluing.
  • a cold-curing adhesive can be used, for example, or a double-sided adhesive tape.
  • the deflection unit 4 is then pushed onto the picture tube in such a way that the tubular extension 6 of the bobbin 5 of the deflection unit 4 comes to rest on the ring 7.
  • the deflection unit 4 is displaced in the longitudinal direction in a suitable adjusting device or rotated about its axis with respect to the picture tube until its optimal position is reached.
  • the approach 6 are connected to the ring 7 by a short welding process, so that the deflection unit 4 is now fixed in its position with respect to the picture tube 1.
  • the tubular extension 6 can be slotted in the direction of the tube axis.
  • Fig. 2 which shows an enlarged section of the parts shown in circle A of Fig. 1, the adhesive layer 8 can also be seen, with which the ring 7 is attached to the picture tube neck 2 and a weld 9, with which the approach 6 and the ring 7 are interconnected.
  • thermoplastic material from which the tubular extension 6 and the ring 7 are made can have a relatively high melting point because only a brief heating is required to weld the two parts, and this does not have any adverse effect on the picture tube.
  • the welding at 9 of FIG. 2 can be achieved, for example, by pressing in a heated stamp at several points on the circumference.
  • the ring 7 preferably has a surface which is curved in the direction of the tube axis or the tube neck. This can be seen particularly well from FIG. 2.
  • the deflection unit can be moved in all directions, and after the two parts made of thermoplastic material have been welded, the picture tube and deflection unit can be taken out of the adjustment holder immediately, since the thermoplastic material quickly solidifies due to its high melting point. Nevertheless, there is no impermissibly high thermal effect on the picture tube, because only a brief and local heating is necessary and the welding takes place on the surface of the ring 7 facing away from the picture tube.
  • thermoplastic material As a result of the relatively high melting point of the thermoplastic material, there is no fear of displacement of the deflection unit due to heating during the operation of the picture tube.

Landscapes

  • Vessels, Lead-In Wires, Accessory Apparatuses For Cathode-Ray Tubes (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
EP87107142A 1986-06-26 1987-05-18 Tube d'image avec unité de déviation Expired - Lifetime EP0250822B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3621363 1986-06-26
DE19863621363 DE3621363A1 (de) 1986-06-26 1986-06-26 Bildroehre mit ablenkeinheit

Publications (3)

Publication Number Publication Date
EP0250822A2 true EP0250822A2 (fr) 1988-01-07
EP0250822A3 EP0250822A3 (en) 1990-04-04
EP0250822B1 EP0250822B1 (fr) 1993-08-04

Family

ID=6303718

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87107142A Expired - Lifetime EP0250822B1 (fr) 1986-06-26 1987-05-18 Tube d'image avec unité de déviation

Country Status (3)

Country Link
EP (1) EP0250822B1 (fr)
JP (1) JPS636733A (fr)
DE (2) DE3621363A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0521555A1 (fr) * 1991-07-02 1993-01-07 Koninklijke Philips Electronics N.V. Tube-image muni d'un dispositif de deviation

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3663751A (en) * 1970-04-16 1972-05-16 Westinghouse Electric Corp Potted elctrical component assembly
JPS5325232B2 (fr) * 1972-04-10 1978-07-25
JPS5093036A (fr) * 1973-12-17 1975-07-24
DE2650907A1 (de) * 1976-11-06 1978-05-18 Licentia Gmbh Fernsehbildroehre mit einer daran befestigten ablenkeinheit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0521555A1 (fr) * 1991-07-02 1993-01-07 Koninklijke Philips Electronics N.V. Tube-image muni d'un dispositif de deviation

Also Published As

Publication number Publication date
DE3786847D1 (de) 1993-09-09
EP0250822B1 (fr) 1993-08-04
EP0250822A3 (en) 1990-04-04
JPS636733A (ja) 1988-01-12
DE3621363A1 (de) 1988-01-14

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