EP0790459B1 - Kabelklemme für Lampenfassungen mit einem Halter in Form eines Rohres oder Stange für einen sehr leichten Zusammenbau - Google Patents

Kabelklemme für Lampenfassungen mit einem Halter in Form eines Rohres oder Stange für einen sehr leichten Zusammenbau Download PDF

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Publication number
EP0790459B1
EP0790459B1 EP19970102257 EP97102257A EP0790459B1 EP 0790459 B1 EP0790459 B1 EP 0790459B1 EP 19970102257 EP19970102257 EP 19970102257 EP 97102257 A EP97102257 A EP 97102257A EP 0790459 B1 EP0790459 B1 EP 0790459B1
Authority
EP
European Patent Office
Prior art keywords
tube
power cord
lamp holder
cord clamp
passage
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
EP19970102257
Other languages
English (en)
French (fr)
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EP0790459A3 (de
EP0790459A2 (de
Inventor
Aldo Arditi
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.)
ARDITI SpA
Original Assignee
ARDITI 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
Priority claimed from ITMI960124 external-priority patent/IT240456Y1/it
Priority claimed from IT96MI000814 external-priority patent/IT241065Y1/it
Application filed by ARDITI SpA filed Critical ARDITI SpA
Publication of EP0790459A2 publication Critical patent/EP0790459A2/de
Publication of EP0790459A3 publication Critical patent/EP0790459A3/de
Application granted granted Critical
Publication of EP0790459B1 publication Critical patent/EP0790459B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/58—Means for relieving strain on wire connection, e.g. cord grip, for avoiding loosening of connections between wires and terminals within a coupling device terminating a cable
    • H01R13/582—Means for relieving strain on wire connection, e.g. cord grip, for avoiding loosening of connections between wires and terminals within a coupling device terminating a cable the cable being clamped between assembled parts of the housing
    • H01R13/5825—Means for relieving strain on wire connection, e.g. cord grip, for avoiding loosening of connections between wires and terminals within a coupling device terminating a cable the cable being clamped between assembled parts of the housing the means comprising additional parts captured between housing parts and cable
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V27/00—Cable-stowing arrangements structurally associated with lighting devices, e.g. reels 
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R33/00—Coupling devices specially adapted for supporting apparatus and having one part acting as a holder providing support and electrical connection via a counterpart which is structurally associated with the apparatus, e.g. lamp holders; Separate parts thereof
    • H01R33/05—Two-pole devices
    • H01R33/22—Two-pole devices for screw type base, e.g. for lamp

Definitions

  • the present invention relates to a power cord clamp for lamp holders with a support formed by a tube or stem, featuring very easy assembly.
  • Conventional lamp holders with a support formed by a tube or stem are generally constituted by a body made of electrically insulating material, wherein there is provided a seat for the lamp and wherein the electrical connection terminals for the electric power supply cord of the lamp holder are arranged.
  • the support of these lamp holders is provided by means of an externally threaded tube which is connected, by using its external thread, to a threaded hole formed in the lamp holder, generally in the portion of the lamp holder known as dome and located opposite with respect to the region wherein the lamp seat is formed.
  • the electric power cord enters the lamp holder through the supporting tube or stem, which can be metallic or made of synthetic material.
  • lamp holders use power cord clamps, i.e., devices having the purpose of avoiding the sliding of the power cord with respect to the lamp holder, in order to prevent any traction stresses on the cord from being transmitted to the electrical terminals, causing the separation of the power cord and therefore constituting a potential source of accidents.
  • power cord clamps i.e., devices having the purpose of avoiding the sliding of the power cord with respect to the lamp holder, in order to prevent any traction stresses on the cord from being transmitted to the electrical terminals, causing the separation of the power cord and therefore constituting a potential source of accidents.
  • Power cord clamps currently used for these lamp holders are generally substantially disk-shaped and are meant to be accommodated completely inside the lamp holder.
  • the disk-like body of these power cord clamps is centrally provided with a passage for the power cord which is delimited by two opposite wings which allow the cord to pass only in one direction, jamming against the lateral surface of the power cord when a force is applied to said cord in the opposite direction, stopping it.
  • these lamp holders if they use a supporting tube or stem made of metallic material, entail the drawback of requiring the use of an insulating bushing to be fitted on the end of the tube inside the lamp holder, in order to prevent damage to the power cord as a consequence of movements of said cord with respect to the tube which might cause the electrical connection of the tube to the electrical power supply wires of the lamp holder.
  • lamp holders and related power cord clamps could be found in the following documents: FR-A-2509514, US-A-4386817 and US-A-5276280.
  • DE 295 16 288 U discloses a lamp holder and related power cord clamp of the same kind of the one set forth in the preamble of claim 1.
  • a principal aim of the present invention is to obviate the above-described drawbacks by providing a power cord clamp for lamp holders with a support formed by a tube or stem which is highly reliable as regards the locking of the power cord.
  • an object of the present invention is to provide a power cord clamp which can be very simply and rapidly assembled to the lamp holder.
  • Another object of the present invention is to provide a power cord clamp which avoids the need to use insulating bushing even in the case of lamp holders having a metal tube.
  • a further object of the present invention is to provide a power cord clamp having a reduced bulk and competitive production costs.
  • a power cord clamp for lamp holders with a support formed by a tube or stem comprising a body having at least one elongated region which can be inserted in the end of the tube or stem which is connected to the lamp holder, said elongated region being crossed longitudinally by a passage for the electric power supply cord of the lamp holder, said body having, in the region crossed by said passage, at least one portion which can flex towards or away from the longitudinal axis of said passage, said flexible portion being provided, on its side directed towards said passage, with power cord clamping means which can engage the cord as a consequence of the flexing of said portion towards the axis of said passage caused by the engagement of the outer surface of the flexible portion against the inner surface of the tube or stem when said elongated region is inserted in said tube or stem, characterized in that said elongated region has no lateral openings, the flexibility of said portion being increased by a reduction in the thickness of said body in the region crossed by said
  • the power cord clamp comprises a body, generally designated by the reference numeral 1, which is preferably made of molded synthetic material and has an elongated and preferably substantially cylindrical region 2 which is crossed coaxially by a passage 3 for the electric power cord 4 of a lamp holder, generally designated by the reference numeral 5, of the type with a support provided by a tube 6 or stem.
  • the region 2 has at least one lateral portion, preferably two lateral portions 7a and 7b, which are formed in two diametrically opposite regions of the skirt of the region 2 and can flex towards or away from the axis of the passage 3.
  • Each one of the portions 7a and 7b is provided, on its face directed towards the passage 3, with cord clamping means which can engage the cable 4 as a consequence of the flexing of the corresponding portion 7a, 7b towards the axis of the passage 3.
  • the cord clamping means comprise at least one tooth 8a, 8b, which protrudes from the face of the corresponding portion 7a, 7b directed towards the longitudinal axis of the passage 3.
  • the tooth 8a of the portion 7a faces the tooth 8b of the portion 7b.
  • the portions 7a, 7b have, on their outward face, at least one raised portion 9a, 9b which can engage the inner surface of the tube 6 when the region 2 is inserted in the tube 6 to cause the flexing of the portions 7a, 7b towards the axis of the passage 3 and therefore cause the engagement of the teeth 8a, 8b with the cord 4.
  • the raised portions 9a, 9b protrude so as to form a conical surface the apex whereof is directed towards the end of the body 1 which is meant to be inserted in the tube 6, so that the flexing of the portions 7a and 7b towards the axis of the passage 3 is gradual during the insertion of the region 2 in the tube 6.
  • the flexible portions 7a, 7b have a thickness gradually increasing starting from their end which is directed towards the end of said body 1 meant to be inserted in the tube 6.
  • the region 2 has a substantially cylindrical shape, except for the raised portions 9a and 9b, and has no lateral openings, so as to ensure an excellent insulation degree of the cord 4 inserted through the passage 3.
  • the flexibility of the portions 7a, 7b is enhanced through a reduction in the thickness of the walls of the body 1 that delimit the passage 3 proximate to the portions 7a, 7b.
  • the outside diameter of the region 2, except for the portions 7a, 7b, is such as to allow an insertion of the region 2 with a slight play inside the tube 6.
  • the body 1 has, at the axial end of the region 2 which lies opposite to the end that can be inserted in the tube 6, two resting tabs 10a and 10b, protruding laterally on opposite sides at right angles to the axis of the passage 3.
  • the tabs 10a and 10b are also provided, on their side lying opposite with respect to the region 2, with feet 11 which can be engaged inside the lamp holder 5.
  • the body 1 of the power cord clamp can have, at the axial end of the region 2 which is opposite with respect to the end that can be inserted in the tube 6, two protective wings 20a and 20b, which protrude between the resting tabs 10a and 10b, also preferably along opposite directions which are substantially perpendicular to the axis of the region 2.
  • Said wings 20a and 20b, the shape whereof can vary according to requirements, have the purpose of further increasing the safety of the electrical insulation of the power cord 4 from any metallic part inside the dome of the lamp holder, allowing to classify the lamp holder in a higher insulation class.
  • the lamp holder 5 is preferably constituted by a dome 12 provided at its top, in a per se known manner, with a threaded hole 13 meant to couple to the tube 6.
  • the dome 12 also has a pair of flexible wings 14a and 14b which can engage in a snap-together fashion locators 15a and 15b formed correspondingly in the lamp holder body 16.
  • the seat 17 for the lamp is formed in the lamp holder body 16, which also accommodates the terminals for electrical connection to the cord 4, which are not illustrated for the sake of simplicity.
  • Seats 18 are formed in the lamp holder body 16, in the region thereof facing the tube 6, and are meant to couple to the feet 11 of the resting tabs 10a and 10b of the body 1 of the power cord clamp.
  • the lamp holder is assembled to the power cord clamp according to the invention as follows.
  • the electric power supply cord 4 is inserted through the tube 6 and through the passage 3 formed in the power cord clamp according to the invention, and the electrical conductors are connected to the terminals located inside the lamp holder body.
  • the power cord clamp according to the invention is slid along the power cord 4 and moved against the body 16 of the lamp holder until its feet 11 engage in the seats 18 specifically provided in the lamp holder body.
  • Assembly is completed by sliding the dome 12 of the lamp holder, together with the tube 6, along the cord 4 until the wings 14a and 14b engage, in a snap-together fashion, the locators 15a and 15b.
  • this final operation also achieves the insertion of the region 2 of the power cord clamp according to the invention inside the tube 6.
  • the portions 7a and 7b engage the inner surface of the tube 6, flexing towards the axis of the passage 3 and therefore engaging the cord 4 and blocking it.
  • the locking of the power cord 4 by means of the power cord clamp according to the invention is achieved automatically when the dome 12 is assembled to the body 16 of the lamp holder 5.
  • the power cord clamp according to the invention fully achieves the intended aim and objects, since it significantly simplifies the operations for the assembly of the lamp holder and ensures considerable strength of the clamping of the electric cord.
  • Another advantage of the power cord clamp according to the invention is that it avoids contact of the power cord with the end of the tube which is connected to the dome of the lamp holder, assuredly eliminating any possibility of damage to the power cord, even if the tube is made of metallic material, without requiring the use of electrically insulating bushings.
  • the materials employed, as well as the dimensions, may be any according to requirements and to the state of the art.

Landscapes

  • Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)

Claims (14)

  1. Stromkabelklemme für Lampenhalterungen mit einem von einem Rohr oder Schaft gebildeten Träger, umfassend einen Körper (1), der mindestens einen langgestreckten Bereich (2) aufweist, der in das Ende des Rohrs (6) oder Schafts, das mit der Lampenhalterung (5) verbunden ist, eingeführt werden kann, wobei der mindestens eine langgestreckte Bereich (2) in Längsrichtung von einem Durchlass (3) für das elektrische Stromversorgungskabel (4) der Lampenhalterung (5) durchsetzt wird, wobei der Körper (1) in dem vom Durchlass (3) durchsetzten Bereich mindestens einen Teil (7) aufweist, der sich zur Längsachse des Durchlasses (3) hin oder von dieser weg biegen kann, wobei der mindestens eine biegsame Teil (7) auf seiner zum Durchlass (3) hin gewandten Seite mit Stromkabelklemmeinrichtungen versehen ist, die infolge des Biegens des mindestens einen biegsamen Teils (7) zur Achse des Durchlasses (3) hin, das durch den Eingriff der äußeren Oberfläche des mindestens einen biegsamen Teils (7) gegen die innere Oberfläche des Rohrs (6) oder Schafts bewirkt wird, wenn der mindestens eine langgestreckte Bereich (2) in das Rohr (6) oder den Schaft eingeführt wird, mit dem Kabel (4) in Eingriff treten können, dadurch gekennzeichnet, dass der mindestens eine langgestreckte Bereich (2) keine seitlichen Öffnungen aufweist, wobei die Biegsamkeit des mindestens einen biegsamen Teils (7) durch eine Verringerung der Dicke des Körpers (1) in dem vom Durchlass (3) durchsetzten Bereich in der Nähe des mindestens einen biegsamen Teils (7) vergrößert wird.
  2. Stromkabelklemme nach Anspruch 1, dadurch gekennzeichnet, dass der Körper (1) aus geformtem Kunststoffmaterial besteht und dass der mindestens eine langgestreckte Bereich (2) eine im Wesentlichen zylindrische Gestalt aufweist und koaxial vom Durchlass (3) durchsetzt wird.
  3. Stromkabelklemme nach Anspruch 2, dadurch gekennzeichnet, dass der mindestens eine biegsame Teil (7) zwei biegsame Teile (7a, 7b) umfasst, die in zwei diametral entgegengesetzten Bereichen der Einfassung des im Wesentlichen zylindrischen Bereichs (2) angeordnet sind.
  4. Stromkabelklemme nach Anspruch 3, dadurch gekennzeichnet, dass die Kabelklemmeinrichtungen mindestens einen Zahn (8) umfassen, der aus der Seite der biegsamen Teile (7a, 7b) übersteht, welche zum Durchlass (3) hin gewandt ist.
  5. Stromkabelklemme nach Anspruch 3, dadurch gekennzeichnet, dass die biegsamen Teile (7a, 7b), auf ihrer Außenseite, mindestens einen erhöhten Teil (9a, 9b) aufweisen, der beim Einführen des Körpers (1) in das Rohr (6) mit der inneren Oberfläche des Rohrs (6) in Eingriff treten kann, um das Biegen der biegsamen Teile (7a, 7b) zur Achse des Rohrs (6) hin zu bewirken.
  6. Stromkabelklemme nach Anspruch 5, dadurch gekennzeichnet, dass der erhöhte Teil (9) entlang einer konischen Oberfläche übersteht, deren Spitze zu dem Ende des Körpers (1) hin gerichtet ist, das in das Rohr (6) eingeführt werden kann, um beim Einführen des im Wesentlichen zylindrischen Bereichs (2) in das Rohr (6) das allmähliche Biegen der biegsamen Teile (7a, 7b) zu bewirken.
  7. Stromkabelklemme nach Anspruch 3, dadurch gekennzeichnet, dass die biegsamen Teile (7a, 7b) eine Dicke aufweisen, die beginnend von ihrem Ende, das zu dem Ende des Körpers (1) hin gerichtet ist, das in das Rohr (6) eingeführt werden soll, allmählich zunimmt.
  8. Stromkabelklemme nach Anspruch 2, dadurch gekennzeichnet, dass der Körper (1) an dem axialen Ende des im Wesentlichen zylindrischen Bereichs (2), das in Bezug zu dem axialen Ende, das in das Rohr (6) eingeführt werden kann, entgegengesetzt ist, zwei Auflagezungen (10a, 10b) aufweist, die mit Füßen (11) versehen sind, welche mit dem Inneren der Lampenhalterung (5) in Eingriff treten können.
  9. Stromkabelklemme nach Anspruch 8, dadurch gekennzeichnet, dass die Auflagezungen (10a, 10b), auf entgegengesetzten Seiten, seitlich in einer Richtung überstehen, die zur Achse des Durchlasses (3) im Wesentlichen senkrecht ist.
  10. Stromkabelklemme nach Anspruch 2, dadurch gekennzeichnet, dass der Körper (1) an dem axialen Ende des zylindrischen Bereichs (2), das zu dem axialen Ende, das in das Rohr (6) eingeführt werden kann, entgegengesetzt liegt, zwei Schutzflügel (20a, 20b) aufweist, um die elektrische Isolierung des elektrischen Stromversorgungskabels (4) innerhalb der Lampenhalterung zu verstärken.
  11. Stromkabelklemme nach Anspruch 10, dadurch gekennzeichnet, dass die Schutzflügel (20a, 20b) zwischen den Auflagezungen (10a, 10b) liegen.
  12. Lampenhalterung (5) mit einem von einem Rohr (6) oder Schaft gebildeten Träger, dadurch gekennzeichnet, dass sie eine Stromkabelklemme (1) nach einem oder mehreren der vorangehenden Ansprüche umfasst, die mindestens teilweise in das Ende des Rohrs (6) oder Schafts, das mit der Lampenhalterung (5) verbunden ist, eingeführt ist.
  13. Lampenhalterung (5) nach Anspruch 12, dadurch gekennzeichnet, dass sie im Inneren, in dem Bereich, der dem Rohr (6) gegenüberliegt, mit Sitzen (18) versehen ist, mit denen die Füße (11) der Auflagezungen (10a, 10b) der Stromkabelklemme (1) in Eingriff gebracht werden können.
  14. Lampenhalterung (5) nach Anspruch 12, dadurch gekennzeichnet, dass sie einen Lampenhalterungskörper (16), in dem die Lampenfassung (17) vorgesehen ist, die elektrischen Verbindungsanschlüsse und eine mit einem axialen Ende des Rohrs (6) oder Schafts verbundene Kappe (12) umfasst, wobei die Kappe (12) mittels einer Zusammenrastkupplung (14a, 14b und 15a, 15b) mit dem Lampenhalterungskörper (16) verbunden ist.
EP19970102257 1996-02-19 1997-02-12 Kabelklemme für Lampenfassungen mit einem Halter in Form eines Rohres oder Stange für einen sehr leichten Zusammenbau Expired - Lifetime EP0790459B1 (de)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
ITMI960124 IT240456Y1 (it) 1996-02-19 1996-02-19 Serracavo per portalampade con supporto a tubetto,o tige,ad elevatasemplicita' di assemblaggio
ITMI960124U 1996-02-19
ITMI960814U 1996-12-11
IT96MI000814 IT241065Y1 (it) 1996-12-11 1996-12-11 Serracavo per portalampade con supporto a tubetto o tige ad elevatasemplicita' di assemblaggio

Publications (3)

Publication Number Publication Date
EP0790459A2 EP0790459A2 (de) 1997-08-20
EP0790459A3 EP0790459A3 (de) 1998-12-30
EP0790459B1 true EP0790459B1 (de) 2003-05-02

Family

ID=26331347

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19970102257 Expired - Lifetime EP0790459B1 (de) 1996-02-19 1997-02-12 Kabelklemme für Lampenfassungen mit einem Halter in Form eines Rohres oder Stange für einen sehr leichten Zusammenbau

Country Status (3)

Country Link
EP (1) EP0790459B1 (de)
DE (1) DE69721356T2 (de)
ES (1) ES2198510T3 (de)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT243709Y1 (it) * 1998-01-08 2002-03-06 Vlm Spa Portalampada a bloccaggio rapido del cavo
IT247852Y1 (it) * 1999-05-07 2002-09-10 Verda Srl Serracavo per apparecchiature elettriche
IT250199Y1 (it) * 2000-10-20 2003-07-24 Arditi Spa Portalampada con bloccaggio rapido del cavo di alimentazione elettrica
US6808292B2 (en) 2003-01-13 2004-10-26 Bun Wong Lamp holder
DE10319656A1 (de) * 2003-04-29 2004-11-18 Walther-Werke Ferdinand Walther Gmbh Steckvorrichtung
DE102006018787A1 (de) * 2006-04-20 2007-11-15 Bjb Gmbh & Co.Kg Elektrisches Anschlusselement
CN105846274A (zh) * 2015-01-13 2016-08-10 信锦企业股份有限公司 扩充机的制造方法
CN108493714A (zh) * 2018-03-08 2018-09-04 广州市科卡通信科技有限公司 一种改进型计算机装置
JP6689469B1 (ja) * 2019-04-10 2020-04-28 三菱電機株式会社 電磁接触器
EP4198384B1 (de) * 2021-12-17 2024-06-26 Ling Mei Te Lighting Co., Ltd Lampenhalterung mit festem draht

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE7936017U1 (de) * 1979-12-21 1980-03-27 Richard Hirschmann Radiotechnisches Werk, 7300 Esslingen Kabelabfangung
FR2509514B2 (fr) * 1980-12-03 1986-04-18 Midi Moulages Plast Piece perfectionnee pour l'isolation d'une douille d'appareil electrique et utilisation de celle-ci pour isoler une douille a vis
DE3813233C2 (de) * 1987-04-24 1997-04-17 Murjahn Kg Vlm Glühlampenfassung
GB9011231D0 (en) * 1990-05-18 1990-07-04 Ranton & Co Ltd Lampholders
US5276280A (en) * 1992-04-30 1994-01-04 Ball Charles R Electrical cable connector
IT234157Y1 (it) * 1994-10-13 2000-02-23 Vlm Spa Portalampada a montaggio automatico rapido

Also Published As

Publication number Publication date
EP0790459A3 (de) 1998-12-30
DE69721356T2 (de) 2004-03-25
ES2198510T3 (es) 2004-02-01
DE69721356D1 (de) 2003-06-05
EP0790459A2 (de) 1997-08-20

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