EP0821388B1 - Einrichtung zur Befestigung einer Ablenkeinheit auf dem Hals einer Kathodenstrahlröhre - Google Patents

Einrichtung zur Befestigung einer Ablenkeinheit auf dem Hals einer Kathodenstrahlröhre Download PDF

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Publication number
EP0821388B1
EP0821388B1 EP97401693A EP97401693A EP0821388B1 EP 0821388 B1 EP0821388 B1 EP 0821388B1 EP 97401693 A EP97401693 A EP 97401693A EP 97401693 A EP97401693 A EP 97401693A EP 0821388 B1 EP0821388 B1 EP 0821388B1
Authority
EP
European Patent Office
Prior art keywords
separator
tube
neck
coils
deflection coils
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
EP97401693A
Other languages
English (en)
French (fr)
Other versions
EP0821388A1 (de
Inventor
Nacerdine Azzi
Jean-Philippe Descombes
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.)
Thomson Tubes and Displays SA
Original Assignee
Thomson Tubes and Displays SA
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 Thomson Tubes and Displays SA filed Critical Thomson Tubes and Displays SA
Publication of EP0821388A1 publication Critical patent/EP0821388A1/de
Application granted granted Critical
Publication of EP0821388B1 publication Critical patent/EP0821388B1/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
    • H01J29/46—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 beam deflection system electronic devices for cathode ray tube, and more particularly device ensuring the immobilization of said system on the neck of the tube.
  • Such a deflection system also called deviator, is generally consisting of a pair of vertical deflection coils, a pair of horizontal deflection coils and a substantially shaped ring frustoconical magnetic material for concentrating the flow created by the coils.
  • Horizontal deflection coils are usually saddle shape; the vertical deflection coils can be shaped saddle or torus-shaped and in the latter case are wrapped around of the ring made of magnetic material.
  • the two pairs of deflection coils are electrically isolated by a separator, generally of plastic material, which furthermore allows to improve the mechanical rigidity of the deflection device, to position the coils relative to each other and adjust the set on the neck of the tube.
  • the separator consists of a main body, in one or several parts, substantially funnel-shaped, and partly flexible back that fits the neck of the tube and is intended to fix the position of the deflection system along the longitudinal axis of the tube; this fixation is usually operated by means of a fixation collar arranged above the flexible rear part.
  • the coils deflectors are installed on the separator and adjusted in position, the to each other so as to generate the fields of deflection, vertical and horizontal, in accordance with the ray tube cathodic that the deflector is intended to equip.
  • the deviator is then placed on the neck of the tube, its position on the main axis Z of the tube is set so that, in the absence of a deflection field, the three electron beams from the electron gun converge on the screen of the said tube.
  • the deviator is kept in this position usually thanks to a clamp on the back ring of the separator, part designed to have the necessary flexibility to allow the introduction of the deflector and its subsequent tightening on the neck of the tube.
  • Such a deflection system is described in EP 0 690 470.
  • this design requires leaving the outer surface free ring of the separator, at the rear end of the deflection coils, surface on which will be arranged the clamping collar ensuring the maintenance definitive in position along the Z axis of the deflector.
  • the main defect that induces this structure is the final length that must present the separator and therefore the deviator to integrate the support functions of deflection and fixing coils on the neck of the tube.
  • the length of deviator influences the length of the neck of the tube that will support it. That is even more sensitive for the deviators including the deflection coils vertical are saddle-shaped, which extend along the Z axis on a length greater than that of the toroidal coils.
  • the deflector comprises a pair of vertical deflection coils, a pair of deflection coils horizontal, at least one of these two pairs being saddle-shaped, a rigid separator insulating from each other the pairs of coils of deflection, a ferromagnetic material ring of substantially truncated cone disposed over at least a portion of the coils of deflection and a fastening element for securing to the separator to fix the back of the deflator on the neck of the tube, the fixing element comprising a flexible part which extends between the separator and the neck of the tube, in a region partly situated under the vertical deflection coils, characterized in that the flexible part is in the form of a substantially frustoconical ring ( 22) and cooperates with a shoulder (20) disposed on the rear inner surface of the separator (2) so as to fix the separator on the neck of the tube by the hoop effect.
  • FIG. 1 represents a deflection system also called deflector, comprising a pair of horizontal deflection coils 3 in the form of saddle, a pair of vertical deflection coils 4 also shaped seat, isolated from the previous by a separator 2; a ring in ferromagnetic material 5 is disposed around the coils 3 and 4.
  • the assembly is disposed on the neck 8 of a cathode ray tube 6, Z main axis, to deflect the electron beams from the barrel 7, along the X and Y axes, so that they explore the screen surface 9 of the tube.
  • the coils of deflection are arranged on the separator body and their relative positioning is precisely tuned to generate deflection fields of desired conformation. Once this setting accomplished, the reels must remain in place until the later stage final immobilization on the separator, a step generally carried out by gluing of the coils on the separator body.
  • the deflector is then installed on the neck 8 of the tube in a position precise to adjust the position of horizontal deflection centers and vertical. This adjustment made; immobilization of the deflector along the Z axis is definitely ensured thanks to a clamp 11 arranged on the rear portion 10 of the separator and exerting a force substantially radial on this part 10 to press against the neck of the tube.
  • the vertical and horizontal deflection coils 4 and 3 are saddle-shaped, their respective length along the Z axis is substantially the same.
  • the separator 2 shifts the coils 4 with respect to the coils 3 so that the rear part of the vertical deflection coils extends more towards the cylindrical end of the tube than the deflection coils horizontal.
  • the length of the Vertical deflection windings is barely larger than the length along the Z axis of ring 5. It may happen that for needs related to desired performance, that the length of said ring 5 is such that the rear part of the vertical deflection coils extends, in this case also, more towards the cylindrical end of the tube than the coils of horizontal deflection.
  • the invention uses the free space conductor 13, partly located under the rear end of the coils of vertical deflection at the rear of horizontal deflection coils; according to the invention, the element action zone making the attachment of the deflector on the neck of the tube is located in space 13.
  • the fastening element 21 has at least two parts: a first part 23 intended to make the element 21 integral with the separator and a part 22 intended to ensure the attachment of the separator on the neck of the tube.
  • Part 22 is a substantially frustoconical ring pierced with openings radial 31 showing a series of teeth 30.
  • the inner surface of the ring is cylindrical, of diameter 35, slightly greater than diameter of the neck of the tube.
  • the fastening element is for example in flange 23 formed with apertures 24 in a parallel direction to the axis of revolution of the ring 22.
  • FIG. 2 is an exemplary embodiment of the invention using a clamping member as shown in Figures 3A and 3B.
  • the end cylindrical of the separator 2 has a shoulder 20 of surface 28 substantially frustoconical and a collar 25 aperture opening 26 in a direction parallel to the Z axis.
  • the flange 25 comprises at least two openings 26, diametrically opposed coming opposite openings 24 located on the flange 23 of the fastener.
  • the separator is fixed after adjusting the Z position of the deflector on the neck of the tube by insertion of the fastening element 21 on the collar and translation to the deflector; the frustoconical portion 22 of the element 21 enters the free area between the separator and the collar of the tube, at least partly under the rear of vertical deflection coils 4; part 22 passes under the shoulder 20 bringing, taking into account the complementary frustoconical shapes the surfaces 27 and 28, respectively elements 20 and 21 in contact with each other.
  • the forced approximation of the clamping element 21 against the shoulder 20, given the radial flexibility of the teeth 30, pushes the said teeth against the surface 8 of the neck of the tube ensuring the maintenance in position from the back of the diverter by fret effect.
  • the shape of the shoulder 20 not being necessarily complementary to that of Part 22.
  • the shoulder 20 is in ring shape of semi circular section.
  • the shoulder 20 will also push back the flexible portion 22, substantially frustoconical against the glass surface of the tube ensuring a clamping by fret effect.
  • At least two pawns 51 integral with the separator body extend towards the rear of the latter in a direction parallel to the Z axis. These pins are intended to cooperate with non-return washers 52 arranged in the openings 24 of the flange 25 of the fastening element 21 to prevent any movement of withdrawal when the pin 51 has penetrated into the opening of the washer 52.
  • the shoulder 20 may alternatively be made in one piece with the plastic material injection separator in the mold of manufacture of said separator, either it can be a patch and by example glued to the back of the separator. In the latter case the material may be different from that of the separator and chosen according to its own qualities. As shown in Figure 4, splines 40 can be practiced on the surface 28 to reduce the mass of the annular shoulder 20.
  • the fastening element 21 can be made integrally by injection plastic material in a mold; in one embodiment alternative element 21 can be made of at least two parts in different material. In the latter case the material constituting the flange can be chosen for these qualities of high mechanical rigidity plastic or metal, for example, while Part 22 may be material chosen to obtain good flexibility and / or to improve the contact with the glass neck of the tube to prevent slipping on this collar after immobilization (eg rubber or silicone).

Landscapes

  • Vessels, Lead-In Wires, Accessory Apparatuses For Cathode-Ray Tubes (AREA)
  • Formation Of Various Coating Films On Cathode Ray Tubes And Lamps (AREA)

Claims (9)

  1. Ablenkeinheit für Elektronenstrahlen für Kathodenstrahlröhren mit einem Paar von Vertikalablenkspulen (4), einem Paar von Horizontalablenkspulen (3), wobei wenigstens eines der Paare die Form eines Sattels hat, einem festen Trennteil (2), das die beiden Paare von Ablenkspulen voneinander trennt, einem Ring (5) aus ferromagnetischem Material mit einer im Wesentlichen kegelstumpfförmigen Form auf wenigstens einem Teil der Ablenkspulen und einem Befestigungselement (21), verbunden mit dem Trennteil zur Befestigung der hinteren Ablenkeinheit auf dem Röhrenhals, wobei das Befestigungselement einen flexiblen Teil enthält, der sich zwischen dem Trennteil und dem Röhrenhals in einem Bereich teilweise unter den Vertikalablenkspulen erstreckt,
    dadurch gekennzeichnet, dass
    der flexible Teil die Form eines im Wesentlichen kegelstumpfförmigen Rings (22) hat und mit einer Schulter (20) auf der Innenfläche des hinteren Teils des Trennteils (2) derart zusammen wirkt, dass das Trennteil (2) durch Reibungswirkung auf dem Röhrenhals befestigt ist.
  2. Ablenkeinheit für Elektronenstrahlen für Kathodenstrahlröhren nach Anspruch 1, dadurch gekennzeichnet, dass der flexible Teil deformiert wird, wenn er in Berührung mit dem hinteren Teil (2) des Trennteils gelangt, um das Trennteil auf dem Röhrenhals durch Reibungswirkung zu befestigen.
  3. Ablenkeinheit nach einem der Ansprüche 1 oder 2, dadurch gekennzeichnet, dass der Teil (22) des Befestigungselements in Form eines im Wesentlichen kegelstumpfförmigen Teils in im Wesentlichen radialen Richtungen deformierbar ist.
  4. Ablenkeinheit nach einem der Ansprüche 2 bis 3, dadurch gekennzeichnet, dass das Befestigungselement (21) aus wenigstens zwei verschiedenen Materialien besteht.
  5. Ablenkeinheit nach einem der Ansprüche 2 bis 4, dadurch gekennzeichnet, dass Kerben (31) auf dem im Wesentlichen kegelstumpfförmigen Teil (22) des Befestigungselements (21) vorgesehen sind.
  6. Ablenkeinheit nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass Rillen (40) auf der Innenfläche der Schulter (20) vorgesehen sind.
  7. Einheit nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass die Ausbildung der Befestigungsmittel (21) und des Trennteils (2) als ein Stück durch wenigstens zwei Mutter/Schrauben-Verbindungen erfolgt.
  8. Einheit nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass die Verbindung des Befestigungselements mit dem Trennteil aus wenigstens zwei Zapfen (51) besteht, die sich entlang der Achse Z erstrecken und jeder in die Öffnung einer Sicherungsscheibe (52) eingreift.
  9. Kathodenstrahlröhre mit einer Einheit nach wenigstens einem der vorangehenden Ansprüche.
EP97401693A 1996-07-25 1997-07-15 Einrichtung zur Befestigung einer Ablenkeinheit auf dem Hals einer Kathodenstrahlröhre Expired - Lifetime EP0821388B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR9609398 1996-07-25
FR9609398A FR2751786B1 (fr) 1996-07-25 1996-07-25 Dispositif de fixation d'un deviateur sur le col d'un tube a rayons cathodiques
US08/844,814 US5923117A (en) 1996-07-25 1997-04-22 Deflection yoke securing device

Publications (2)

Publication Number Publication Date
EP0821388A1 EP0821388A1 (de) 1998-01-28
EP0821388B1 true EP0821388B1 (de) 2005-06-01

Family

ID=26232871

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97401693A Expired - Lifetime EP0821388B1 (de) 1996-07-25 1997-07-15 Einrichtung zur Befestigung einer Ablenkeinheit auf dem Hals einer Kathodenstrahlröhre

Country Status (5)

Country Link
US (1) US5923117A (de)
EP (1) EP0821388B1 (de)
JP (1) JP3976846B2 (de)
CN (1) CN1294612C (de)
FR (1) FR2751786B1 (de)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6404118B1 (en) * 2000-12-09 2002-06-11 Samsung Electro-Mechanics Co., Ltd. Deflection yoke with a coil separator firmly engaged to the printed circuit board for preventing fluctuation
US20080203888A1 (en) * 2004-12-31 2008-08-28 Thomson Licensing S.A. Cathode Ray Tube Deflection Yoke Securing Device
US20080061672A1 (en) * 2004-12-31 2008-03-13 Baran Anthony S Cathode Ray Tube Deflection Yoke Securing Device
JP4763522B2 (ja) 2006-06-14 2011-08-31 株式会社ブリヂストン タイヤ検査装置
JP4512578B2 (ja) 2006-10-27 2010-07-28 株式会社ブリヂストン 分離フィルタ決定装置及びタイヤ検査装置

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4016363A (en) * 1976-03-15 1977-04-05 Rca Corporation Method for adhering components platform to cathode-ray tube and product thereof
JPS58198833A (ja) * 1982-05-14 1983-11-18 Hitachi Ltd カラ−ブラウン管
NL8304215A (nl) * 1983-12-07 1985-07-01 Philips Nv Afbuigspoelenstel voor een beeldweergeefbuis.
US4616265A (en) * 1984-12-21 1986-10-07 Rca Corporation Deflection yoke assembly and mounting arrangement
JPH081788B2 (ja) * 1985-04-10 1996-01-10 松下電器産業株式会社 偏向ヨーク
KR930000341Y1 (ko) * 1990-10-24 1993-01-25 삼성전관 주식회사 편향 요크
KR930004295Y1 (ko) * 1990-12-06 1993-07-10 삼성전관 주식회사 편향 요크
KR940005605Y1 (ko) * 1991-08-29 1994-08-19 주식회사 금성사 칼라브라운관의 편향요크 유동 방지 장치
KR950011706B1 (ko) * 1992-11-10 1995-10-07 삼성전관주식회사 투사형 수상관용 편향요크 및 포커스 마그네트의 고정구조
EP0734627A4 (de) * 1993-12-16 1999-11-17 Thomson Consumer Electronics Verfahren zur montage eines ablenkjochs und halterung dafür
DE69414698T2 (de) * 1994-07-01 1999-04-08 Thomson Tubes & Displays Elektronenstrahl-Ablenksystem für Kathodenstrahlröhren
ATE163107T1 (de) * 1994-07-01 1998-02-15 Thomson Tubes & Displays Elektronenstrahl-ablenksystem für kathodenstrahlröhren
CA2157104C (en) * 1994-08-29 2002-03-12 Masanobu Honda Deflection yoke and color cathode ray tube comprising the deflection yoke

Also Published As

Publication number Publication date
EP0821388A1 (de) 1998-01-28
US5923117A (en) 1999-07-13
FR2751786B1 (fr) 1998-10-16
FR2751786A1 (fr) 1998-01-30
JP3976846B2 (ja) 2007-09-19
JPH10106453A (ja) 1998-04-24
CN1173038A (zh) 1998-02-11
CN1294612C (zh) 2007-01-10

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