EP0512452B1 - Vorrichtung zum Montieren einer Schattenmaske in einer Farbbildröhre - Google Patents

Vorrichtung zum Montieren einer Schattenmaske in einer Farbbildröhre Download PDF

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Publication number
EP0512452B1
EP0512452B1 EP19920107490 EP92107490A EP0512452B1 EP 0512452 B1 EP0512452 B1 EP 0512452B1 EP 19920107490 EP19920107490 EP 19920107490 EP 92107490 A EP92107490 A EP 92107490A EP 0512452 B1 EP0512452 B1 EP 0512452B1
Authority
EP
European Patent Office
Prior art keywords
shadow mask
engaging hole
panel
mounting
panel pin
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.)
Expired - Lifetime
Application number
EP19920107490
Other languages
English (en)
French (fr)
Other versions
EP0512452A1 (de
Inventor
Ho Seog Seo
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.)
LG Electronics Inc
Original Assignee
Gold Star Co Ltd
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 Gold Star Co Ltd filed Critical Gold Star Co Ltd
Publication of EP0512452A1 publication Critical patent/EP0512452A1/de
Application granted granted Critical
Publication of EP0512452B1 publication Critical patent/EP0512452B1/de
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
    • H01J29/02—Electrodes; Screens; Mounting, supporting, spacing or insulating thereof
    • H01J29/06—Screens for shielding; Masks interposed in the electron stream
    • H01J29/07—Shadow masks for colour television tubes
    • H01J29/073—Mounting arrangements associated with shadow masks

Definitions

  • the present invention concerns a device for mounting a shadow mask in a color television tube, which obviates a possible screen damage during assembly.
  • a color television tube comprises a panel 1, funnel 11, electron gun 13 enclosed in the neck portion 12 of the funnel, and shadow mask mounted in the inside of the panel, as shown in Fig. 1.
  • the shadow mask 3 comprises the effective main portion with a plurality of slits or perforations for passing electron beams, and skirt portion formed almost perpendicularly to the periphery of the effective main portion.
  • the skirt portion has a plurality of frames 4 welded thereto for supporting the shadow mask. Attached to the outside of the frames is a resilient support member 10 with an engaging hole 14 to mount the shadow mask 3 to face the inside of the panel 1. The resilient support member is caught by a panel pin projected on the inside of the panel 1.
  • the resilient support member 10 attached to the frames 4 is pressed inwardly and moved toward the panel 1, so that the engaging hole 14 is aligned with the panel pin 2. Then, if the resilient support member 10 is released to return to the original position by its resilient force, the panel pin 2 is firmly inserted into the engaging hole 14.
  • the engaging holes 14 may not only be aligned with the panel pins as shown in Fig. 2, but also the shadow mask 3 may contact the screen of the panel 1 so as to damage the phosphor layers of the screen.
  • a device for mounting a shadow mask in a color television tube is known from US-A-3 501 663. From this prior art it is known to provide an engaging hole for receiving a panel pin projecting from the skirt of a panel to support the shadow mask. It is also known to provide a resilient sloped portion for guiding said panel pin which returns to the original position when the panel pin is inserted into the engaging hole. Moreover, this prior art shows a guide groove being formed on the surface of said sloped portion for smoothly guiding said panel pin towards said engaging hole.
  • a device for mounting a shadow mask in a color television tube comprises the following features:
  • a device for mounting a shadow mask in a color television tube comprises a plurality of frames 4 attached to the skirt portion of the shadow mask and a resilient support member 5 with an engaging hole 6 attached to the frame.
  • the engaging hole 6 of the resilient support member 5 receives a panel pin 2 projected on the panel 1.
  • the resilient support member 5 has a sloped guide surface 7 and guide groove 8. Behind the engaging hole 6 is provided a stopper 9 to prevent the panel pin from being excessively moved behind the engaging hole so as to properly align it with the engaging hole.
  • the guide groove 8 is formed to have an arcuate cross section and the slope smaller than that of the sloped guide surface so as to smoothly guide the panel pin 2 to the engaging hole 6.
  • the depth of the guide groove 8 is at least equal to or greater than the engaging surface of the panel pin so as to provide an enough space for guiding the panel pin.
  • the shadow mask 3 In operation, if the shadow mask 3 is moved toward the panel 1, the panel pin 2 formed on the panel 1 presses the sloped guide surface 7 of the resilient support member 5 guided by the guide groove 8 to the engaging hole 6. Then, if a further moving of the shadow mask aligns the panel pin 2 with the engaging hole 6, the sloped guide surface 7 which has been pressed by the panel pin resiliently recovers its original position so as to fix the panel pin 2 into the engaging hole 6.
  • the stopper 9 is to prevent the panel pin 2 from being excessively moved behind the engaging hole, as shown in Fig. 3B.
  • the stopper 9 may be separately prepared and welded to the surface of the resilient support member 5 behind the engaging hole 6 as shown in Fig. 4, or otherwise integrally formed with the resilient support member by bending a portion of the free end thereof as shown in Fig. 5.
  • the inventive device does not need the manually pressing of the resilient support member and prevents the shadow mask from being excessively moved toward the panel screen, thus facilitating the assembly of the shadow mask as well as preventing any possible screen damage and misalignment of the shadow mask.

Landscapes

  • Electrodes For Cathode-Ray Tubes (AREA)

Claims (3)

  1. Vorrichtung zum Montieren einer Schattenmaske in einer Farbbildröhre, umfassend:
    a) einen ersten Teil, der zur Befestigung an dem Maskenrahmens ausgebildet ist, und einen zweiten Teil, der mit einer Eingriffsöffnung (6) zur Aufnahme eines Frontplattenstiftes (2) versehen ist, der an dem Rand einer Frontplatte (1) zur Befestigung der Schattenmaske absteht;
    b) einen elastischen Mittelteil zwischen dem ersten und zweiten Teil, wobei der Mittelteil eine schräge Führungsfläche (7) zum Führen des Frontplattenstiftes (2) aufweist, wobei der Mittelteil durch die Oberfläche gebogen wird, die den Frontplattenstift (2) vorwärtstreibt und aufgrund seiner elastischen Kraft in den ursprünglichen Zustand zurückkehrt, wenn der Frontplattenstift (2) in die Eingriffsöffnung (6) eingesetzt ist;
    c) wobei der Mittelteil ferner eine Führungsrille (8) umfaßt, die hinter der schrägen Führungsfläche (7) ausgebildet ist und zur reibungslosen Führung des Frontplattenstiftes (2) zu der Eingriffsöffnung (6) dient; und
    d) einen Anschlag (9), der hinter der Eingriffsöffnung (6) vorgesehen ist, um zu verhindern, daß der Frontplattenstift (2) übermäßig hinter die Eingriffsöffnung (6) bewegt wird, so daß er korrekt mit der Eingriffsöffnung (6) ausgerichtet wird.
  2. Vorrichtung zum Montieren einer Schattenmaske in einer Farbbildröhre nach Anspruch 1, wobei die Führungsrille (8) einen bogenförmigen Querschnitt und eine Neigung aufweist, die kleiner als jene der elastischen schrägen Führungsfläche ist.
  3. Vorrichtung zum Montieren einer Schattenmaske in einer Farbbildröhre nach Anspruch 1, wobei der Anschlag (9) einstückig mit der schrägen Führungsfläche (7) ausgebildet ist.
EP19920107490 1991-05-03 1992-05-04 Vorrichtung zum Montieren einer Schattenmaske in einer Farbbildröhre Expired - Lifetime EP0512452B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR910063003 1991-05-03
KR630391 1991-05-03

Publications (2)

Publication Number Publication Date
EP0512452A1 EP0512452A1 (de) 1992-11-11
EP0512452B1 true EP0512452B1 (de) 1996-04-10

Family

ID=19327517

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19920107490 Expired - Lifetime EP0512452B1 (de) 1991-05-03 1992-05-04 Vorrichtung zum Montieren einer Schattenmaske in einer Farbbildröhre

Country Status (1)

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EP (1) EP0512452B1 (de)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6265818B1 (en) * 1994-09-02 2001-07-24 Philips Electronics North America Corporation Stiffened support springs and CRT incorporating same
ITMI20022539A1 (it) * 2002-11-29 2004-05-30 Videocolor Spa Supporto per gruppo telaio/maschera di tubo a raggi catodici a colori
US20050171465A1 (en) 2004-02-03 2005-08-04 Smith Robert C. Pneumoperitoneum needle

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3501663A (en) * 1968-08-12 1970-03-17 Sylvania Electric Prod Parallax barrier protecting means for cathode ray tubes having patterned screens
GB1218726A (en) * 1968-08-12 1971-01-13 Sylvania Electric Prod Guide for parallax barrier
NL8801944A (nl) * 1988-08-04 1990-03-01 Philips Nv Werkwijze voor het vervaardigen van een kleurenbeeldbuis.

Also Published As

Publication number Publication date
EP0512452A1 (de) 1992-11-11

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