EP1014418A1 - Elektrische Verbindungsanordnung für eine Kathodenstrahlröhre und eine Herstellungsverfahren dafür - Google Patents

Elektrische Verbindungsanordnung für eine Kathodenstrahlröhre und eine Herstellungsverfahren dafür Download PDF

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Publication number
EP1014418A1
EP1014418A1 EP98830782A EP98830782A EP1014418A1 EP 1014418 A1 EP1014418 A1 EP 1014418A1 EP 98830782 A EP98830782 A EP 98830782A EP 98830782 A EP98830782 A EP 98830782A EP 1014418 A1 EP1014418 A1 EP 1014418A1
Authority
EP
European Patent Office
Prior art keywords
clip
connection device
stiffening element
cable
electrical connection
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.)
Withdrawn
Application number
EP98830782A
Other languages
English (en)
French (fr)
Inventor
Pasquale Forte
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.)
Eldor Corporation SpA
Original Assignee
Eldor Corporation SpA
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 Eldor Corporation SpA filed Critical Eldor Corporation SpA
Priority to EP98830782A priority Critical patent/EP1014418A1/de
Publication of EP1014418A1 publication Critical patent/EP1014418A1/de
Withdrawn legal-status Critical Current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
    • H01J29/92—Means forming part of the tube for the purpose of providing electrical connection to it
    • H01J29/925—High voltage anode feedthrough connectors for display tubes

Definitions

  • the present invention relates to an electrical connection device, in particular for cathode tube power supply, and to a method of manufacturing the same.
  • the device in accordance with the present invention is intended for anchoring and connecting high-voltage electric terminals to cathode tubes incorporated into electric apparatuses such as monitors or television sets, for example.
  • connection devices are available on the market that are arranged to power high-voltage cathode-ray tubes.
  • These devices substantially consist of a body of silicone material substantially having the shape of a suction cup and provided at the upper part thereof with a hollow tubular portion arranged for fitting a suitably insulated electric wire carrying high voltage.
  • the hollow tubular portion has an insertion opening for receiving the electric cable and an exit opening turned Internally of the cavity defined by the suction cup under engagement conditions so that live terminals are at the inside of the cavity.
  • the device further has a metal fork positioned at the exit opening which is electrically connected with a conductor by welding and is mechanically connected by clipping of a head portion thereof to the insulating sheath of the conductor itself.
  • the elastic fork is further fitted into a rest housing formed in the silicone support body at the exit opening of the tubular portion.
  • the metal fork itself has two opposite projecting teeth intended for being engaged in a corresponding undercut provided on the surface of the cathode tube.
  • the connection carried out by means of the teeth is both a mechanical anchoring and an electrical connection.
  • the deformable element of silicone material offers an electrical insulation of the uncovered metal portions and, on the other hand, due to the sealing action exerted by the suction cup, prevents moisture or dust from penetrating into the region where the electric contact is established between the device and the cathode tube.
  • the process for manufacturing the devices of known type involves a first step in which the deformable silicone element is made in the form of a suction cup by moulding.
  • a metal fork is rigidly engaged with the cable and the electrical connection is carried out by a welding operation between the metal wire inside the cable and the fork.
  • the assembly is then covered with a connecting small tube.
  • the cable with the clip and small tube is fitted into the suction cup through a hole until it comes out from the opposite side.
  • the connecting end portion thus made is then introduced into the housing formed in the silicone material of the suction cup.
  • the geometric precision in coupling the parts substantially depends on the manual skill of the assembling operator.
  • the steps of clipping the metal fork, the welding step and the final step of inserting the electric terminal into the silicone housing can be hardly made automatic and therefore are to be made manually, so that qualified staff is required and the production speeds are greatly reduced.
  • the device once assembled is of difficult disassembling and therefore the material-recycling operations when the operating life of the device is over, are very problematic.
  • a still further object of the invention is to create a modular device which can be easily assembled and disassembled so as to ensure easy recycling of the materials.
  • an electrical connection device in particular for cathode-tube power supply, has been generally identified by reference numeral 1.
  • the electrical connection device of the invention is preferably used for establishing high-voltage power supply connections with monitors and/or television sets.
  • the device is arranged to be associated with a surface of attachment of a cathode tube to be power supplied in such a manner that an electric insulation of the uncovered portions of the electrical connections is ensured, as well as the absence in time of dust, dirt and moisture at the connection region.
  • the device is made up of a support body 2 of insulating, in particular thermoplastic, material with which electrical connection means 3 capable of power supplying the electric apparatus with which the device is connected, is operatively associated.
  • the support body 2 substantially in the form of a suction cup, comprises a deformable element 4 which has at least one bell-shaped portion 5.
  • the bell-shaped portion 5 substantially has a frustoconical conformation under undeformed conditions, whereas when the device is associated with the electric apparatus to be power supplied, it is deformed and its lower surface 5a is brought into contact with the attachment surface 6 of the cathode tube (see Fig. 3, in particular).
  • the device 1 and attachment surface 6 define a cavity 7 substantially insulated from the surrounding atmosphere.
  • the deformable element 4 is preferably made of silicone material having the necessary deformability and insulation features.
  • the support body 2 On top of the bell-shaped portion 5, at the region of smaller radial bulkiness of same, the support body 2 has a stiffening element 8 preferably made of plastic material (thermoplastic material, in particular).
  • This second element is much stiffer than the silicone material, which makes the support body 2 more rigid at the upper region 2a thereof.
  • the stiffening element 8 seen in side view in Fig. 2, consists of a first portion 8a of a disk-shaped conformation which is substantially buried in the deformable element 4.
  • This portion 8a has a plurality of through windows 9 spaced apart the same distance from each other at the peripheral region thereof, which windows are such made that they promote gripping of the stiffening element 8 on the deformable element 4.
  • the stiffening element 8 also has an anchoring portion 10 defined at the lower part thereof and turned towards the lower surface 2b of the support body 2.
  • the anchoring portion 10 is intended for receiving a clip 11 (shown in Fig. 5) in engagement therewith, which clip is part of the electrical connection means 3.
  • the anchoring portion 10 is defined by a fitting housing capable of receiving, by snap-fitting for example, or also by interference fit, an attachment head 12 of clip 11 the shape of which at least partly matches the shape of the fitting housing.
  • the stiffening element 8 is then provided with a hollow tubular portion 13 arranged to receive a cable 14 of the electrical connection means 3.
  • the hollow portion 13 has an insertion opening 13a at the outside of the cavity 7 defined by the support body 2 and attachment surface 6 and an exit opening 13b opening into the cavity 7 itself.
  • exit opening 13b of the hollow tubular portion 13 is placed close to an inner wall 10a of the fitting housing 10 of the anchoring portion 8.
  • the electrical connection means 3 in engagement at least with the stiffening element 8 is made up of said clip 11 and cable 14.
  • cable 14 is connected, at one end thereof, with power supply means and transfers high voltage from said means carrying it to clip 11. Said clip, under engagement conditions with the apparatus to be power supplied, transfers current to the apparatus circuits.
  • Clip 11 of metal material, is provided with an attachment head 12 having at least one tab 15 projecting from its overall dimensions and intended for snap-fitting in a respective recess 22 formed in the fitting housing 10 of the stiffening element 8.
  • two tabs 15 are present and they are disposed on opposite surfaces 12a, 12b of the attachment head 12, as shown in Fig. 3.
  • the attachment head 12 then comprises an insertion slit 16 on another side surface 12c thereof for receiving, by interference fit, a metal wire 17 carrying voltage of cable 14.
  • the insertion slit 16 when clip 11 is in engagement with the stiffening element 8, is at the inside of the fitting housing 10.
  • slit 16 appears at the exit opening 13b of the hollow tubular portion 13.
  • the insertion slit 16 is delimited by at least one tab 18 which is elastically deformable along the insertion direction 19 of cable 14.
  • Clip 11 itself then has a locking portion 20 that, when the attachment head 12 is in engagement with the fitting housing 10, is at the outside of the fitting housing itself.
  • the locking portion 20 is arranged to be engaged in an undercut 23 of the attachment surface 6 for ensuring both a mechanical connection and an electrical connection with the apparatus to be power supplied (Fig. 3).
  • the locking portion 20 consists of two opposite teeth 21 defined by a thin plate bent towards the outside of clip 11.
  • the two teeth are snap-fitted into an appropriate recess of the attachment surface, so that they abut against respective portions of the recess itself preventing separation of the connection device from the cathode tube.
  • thickness of the stiffening portion 8, above all close to clip 11, is adapted to ensure a correct insulation of the external environment from voltage passing through the electrical connection means 3.
  • stiffening element 8 preferably made by moulding is arranged.
  • the deformable element 4 is subsequently associated with the stiffening element 8 generally by overmoulding techniques.
  • the process further comprises a step in which, starting from a thin metal sheet, a blank of the electric clip 11 is made by die cutting; the same blank is subsequently bent following preestablished folding lines so as to obtain the clip in its three-dimensional shape.
  • the insertion direction 19, which is substantially coincident with the axis of the hollow portion 13 causes an elastic deformation of tabs 18 defining slit 16 towards the inside of the attachment head 12.
  • the invention achieves important advantages.
  • the lower cost of the material forming the stiffening element as compared with the silicone material greatly reduces expenses for manufacturing the device.
  • connection Due to the absence of welding between the parts forming the electrical connection means, reliability of the connection is greatly improved because said connection is ensured by a mechanical operation of inserting the cable into the tubular portion.
  • stiff element enables snap-fitting of the clip directly on the support body.
  • Combination of the two last-mentioned technical features also ensures an easy assembling of the parts that can be carried out in a completely automatic manner, and at the same time a ready disassembling capable of greatly promoting the material recycling operations.

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  • Connector Housings Or Holding Contact Members (AREA)
EP98830782A 1998-12-23 1998-12-23 Elektrische Verbindungsanordnung für eine Kathodenstrahlröhre und eine Herstellungsverfahren dafür Withdrawn EP1014418A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP98830782A EP1014418A1 (de) 1998-12-23 1998-12-23 Elektrische Verbindungsanordnung für eine Kathodenstrahlröhre und eine Herstellungsverfahren dafür

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP98830782A EP1014418A1 (de) 1998-12-23 1998-12-23 Elektrische Verbindungsanordnung für eine Kathodenstrahlröhre und eine Herstellungsverfahren dafür

Publications (1)

Publication Number Publication Date
EP1014418A1 true EP1014418A1 (de) 2000-06-28

Family

ID=8236930

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98830782A Withdrawn EP1014418A1 (de) 1998-12-23 1998-12-23 Elektrische Verbindungsanordnung für eine Kathodenstrahlröhre und eine Herstellungsverfahren dafür

Country Status (1)

Country Link
EP (1) EP1014418A1 (de)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2507546A1 (de) * 1975-02-21 1976-09-02 Klar & Beilschmidt Fabrik Bildroehren-hochspannungsstecker
DE8702252U1 (de) * 1987-02-13 1987-06-25 Roederstein Spezialfabriken für Bauelemente der Elektronik und Kondensatoren der Starkstromtechnik GmbH, 8300 Landshut Hochspannungsbauteil
WO1987007087A1 (en) * 1986-05-06 1987-11-19 Thole Thomas V Connector assembly for anode socket
DE9111382U1 (de) * 1991-09-13 1991-12-12 Nokia Unterhaltungselektronik (Deutschland) GmbH, 7530 Pforzheim Hochspannungsanschluß

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2507546A1 (de) * 1975-02-21 1976-09-02 Klar & Beilschmidt Fabrik Bildroehren-hochspannungsstecker
WO1987007087A1 (en) * 1986-05-06 1987-11-19 Thole Thomas V Connector assembly for anode socket
DE8702252U1 (de) * 1987-02-13 1987-06-25 Roederstein Spezialfabriken für Bauelemente der Elektronik und Kondensatoren der Starkstromtechnik GmbH, 8300 Landshut Hochspannungsbauteil
DE9111382U1 (de) * 1991-09-13 1991-12-12 Nokia Unterhaltungselektronik (Deutschland) GmbH, 7530 Pforzheim Hochspannungsanschluß

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