EP2980828B1 - An improved lamp assembly - Google Patents

An improved lamp assembly Download PDF

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Publication number
EP2980828B1
EP2980828B1 EP15178889.0A EP15178889A EP2980828B1 EP 2980828 B1 EP2980828 B1 EP 2980828B1 EP 15178889 A EP15178889 A EP 15178889A EP 2980828 B1 EP2980828 B1 EP 2980828B1
Authority
EP
European Patent Office
Prior art keywords
lamp
base
shell
dimples
lamp assembly
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.)
Active
Application number
EP15178889.0A
Other languages
German (de)
French (fr)
Other versions
EP2980828A1 (en
Inventor
Frank Broeders
Marc Willems
Bennie Izaak Pieter Simpelaar
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.)
Flowil International Lighting Holding BV
Original Assignee
Flowil International Lighting Holding BV
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 Flowil International Lighting Holding BV filed Critical Flowil International Lighting Holding BV
Publication of EP2980828A1 publication Critical patent/EP2980828A1/en
Application granted granted Critical
Publication of EP2980828B1 publication Critical patent/EP2980828B1/en
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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J5/00—Details relating to vessels or to leading-in conductors common to two or more basic types of discharge tubes or lamps
    • H01J5/50—Means forming part of the tube or lamps for the purpose of providing electrical connection to it
    • H01J5/54—Means forming part of the tube or lamps for the purpose of providing electrical connection to it supported by a separate part, e.g. base
    • H01J5/56—Shape of the separate part
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J5/00—Details relating to vessels or to leading-in conductors common to two or more basic types of discharge tubes or lamps
    • H01J5/50—Means forming part of the tube or lamps for the purpose of providing electrical connection to it
    • H01J5/54—Means forming part of the tube or lamps for the purpose of providing electrical connection to it supported by a separate part, e.g. base
    • H01J5/58—Means for fastening the separate part to the vessel, e.g. by cement
    • H01J5/60—Means for fastening the separate part to the vessel, e.g. by cement for fastening by mechanical means
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J9/00—Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
    • H01J9/24—Manufacture or joining of vessels, leading-in conductors or bases
    • H01J9/34—Joining base to vessel
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01K—ELECTRIC INCANDESCENT LAMPS
    • H01K1/00—Details
    • H01K1/42—Means forming part of the lamp for the purpose of providing electrical connection, or support for, the lamp
    • H01K1/46—Means forming part of the lamp for the purpose of providing electrical connection, or support for, the lamp supported by a separate part, e.g. base, cap
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21K—NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
    • F21K9/00—Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
    • F21K9/20—Light sources comprising attachment means
    • F21K9/23—Retrofit light sources for lighting devices with a single fitting for each light source, e.g. for substitution of incandescent lamps with bayonet or threaded fittings

Definitions

  • the present invention relates to an improved lamp assembly. Particularly, present invention relates to a screw-able self locking interface between base and glass bulb of the lamp.
  • lamps utilize lamp base shells to facilitate insertion into and removal from a complementary lamp socket and to establish electrical contact between the lamp and the socket.
  • Several structures have been developed to prevent the lamp base shell from separating from the lamp base, particularly when the lamp is removed from-the socket at the end of its useful life.
  • US Patent No. 6,969,947 relates to a lamp that utilizes a lead free lamp base locking ring to secure a lamp base shell to the light source, lamp, or bulb, which eliminates the need for lead solder and/or welding to mechanically hold the base to a light transmissive envelope (also referred to as a body or bulb).
  • US Publication No. 20120187818 is directed to an LED light bulb equipped with light transparent shell fastening structure and particularly to an improved fastening structure to couple a light transparent shell with a heat sink.
  • the light transparent shell includes a sphere and a neck extended from the sphere to wedge in the wedged groove.
  • the sphere and neck have an inner wall surrounded to form a space to hold the light source baseboard and an outer wall on another side opposite to the inner wall.
  • the neck has a longitudinal shell retaining portion on the outer wall corresponding and fastening to the first holding portion and at least one transverse shell retaining portion.
  • US5382869A disclosing a lamp base inner shell comprising a base and a wall extending from the periphery of said base, the wall having a plurality of slots extending from the free end thereof towards the base, the slots defining a number of tabs, at least one tab having an inwardly-extending projection, characterized in that at least one slot extends substantially to said base.
  • the inner shell is used to electrically connect and secure a lamp base shell to a lamp tube.
  • any of the prior art patents does not provide any kind of lock mechanism for the base inner shell. Additionally, with a right turn screw, at end of life, turning out an old lamp out of the fixture can lead to loss of the screw connection if the lock mechanism breaks.
  • Primary object of the present invention is to provide an improved lamp assembly having a screw-able self locking interface between a plastic housing and a glass bulb base.
  • Another object of the present invention is to provide an easy, clean and cost effective connection process without cement, glue or welding.
  • Yet another object of the present invention is to provide left turn screw for mechanical fixation for turning a lamp out of the fixture so as to prevent the lamp base shell from separating from the lamp base.
  • Yet another object of the present invention is to prevent sudden separation of glass bulb from the plastic base shell.
  • Still another object of the present invention is to provide an improved lamp base which is cost effective and provides an efficient assembly line operation.
  • Still another object of the present invention is to provide a simple and cost effective base end structure for electric lamps or similar devices.
  • Lamp assemblies according to the present invention are defined by claims 1 to 3. Preferred embodinments are set out in the dependent claims 4 to 9.
  • the present invention is directed to an improved lamp assembly.
  • the lamp structure of instant invention comprising a glass lamp secured into base shell to form an improved lamp assembly.
  • fig. 1a indicating lower part of glass lamp (10), base (11) of which is provided with a plurality of dimples (12).
  • FIG. 1b shows base shell (13) in accordance with the present invention.
  • Said base shell is having multitude of knops (15) to be clicked in the corresponding glass dimples (12).
  • the lamp base shell further comprises a cylindrical body having left turn screw (14), in which top of the cylindrical body is mounted with a number of knops along its circumference. Said base shell is secured to the lamp base (11) manually by placing it over the base (11) until the dimples (12) are mated with the corresponding knops (15) in the lamp base shell (13).
  • the lamp base shell (13) is provided with left turn screw (14) for mechanical fixation for turning the lamp (10) out of the fixture so as to prevent the lamp base shell (13) from separating from the base (17) as shown in fig 2b .
  • the base (17) constitutes a housing, which is preferably made of plastic. The plastic is again high temperature plastic to sustain high temperature during operation of the lamp i.e. when the lamp is switched on.
  • the lamp base shell (13) has saw teeth (16) on the other side where lamp is not attached. Said saw teeth are disposed along the circumference of the lamp base shell (13) as locking mechanism for use in a ratchet mechanism with the base (17), in which the base (17) has the provision of a number of click fingers (18) for ratchet mechanism as in fig. 2a and 2b .
  • a plurality of holes (19) are provided in the base (17) and click fingers (18) on the lamp base shell (13) for ratchet mechanism as shown in fig. 3 .
  • a multitude of holes (20) can be provided in the lamp base shell (13) and click fingers (18) are located on the base (plastic housing) (17) for ratchet mechanism as shown in fig.4 .

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Fastening Of Light Sources Or Lamp Holders (AREA)

Description

    FIELD OF INVENTION
  • The present invention relates to an improved lamp assembly. Particularly, present invention relates to a screw-able self locking interface between base and glass bulb of the lamp.
    • BACKGROUND/PRIOR ART
  • Most lamps utilize lamp base shells to facilitate insertion into and removal from a complementary lamp socket and to establish electrical contact between the lamp and the socket. Several structures have been developed to prevent the lamp base shell from separating from the lamp base, particularly when the lamp is removed from-the socket at the end of its useful life.
  • Prior art techniques use gluing, cementing and welding of lamp base shells to fix the shells to the glass base which is an additional process step. This needs more investments and therefore offers more expensive products. Further these are not clean processes and posses visual rejects of products. Moreover, gluing and cementing of plastic on glass lead to cracks in the glass due to the different expansion coefficients.
  • Now, reference may be made to the following Patents/Publication:
    US Patent No. 6,969,947 relates to a lamp that utilizes a lead free lamp base locking ring to secure a lamp base shell to the light source, lamp, or bulb, which eliminates the need for lead solder and/or welding to mechanically hold the base to a light transmissive envelope (also referred to as a body or bulb).
  • US Publication No. 20120187818 is directed to an LED light bulb equipped with light transparent shell fastening structure and particularly to an improved fastening structure to couple a light transparent shell with a heat sink. The light transparent shell includes a sphere and a neck extended from the sphere to wedge in the wedged groove. The sphere and neck have an inner wall surrounded to form a space to hold the light source baseboard and an outer wall on another side opposite to the inner wall. The neck has a longitudinal shell retaining portion on the outer wall corresponding and fastening to the first holding portion and at least one transverse shell retaining portion.
  • Till now, metal bases or ceramic bases are connected to glass due to the high temperatures of the glass bulbs.
  • Reference may be made to US5382869A disclosing a lamp base inner shell comprising a base and a wall extending from the periphery of said base, the wall having a plurality of slots extending from the free end thereof towards the base, the slots defining a number of tabs, at least one tab having an inwardly-extending projection, characterized in that at least one slot extends substantially to said base. The inner shell is used to electrically connect and secure a lamp base shell to a lamp tube.
  • However, any of the prior art patents does not provide any kind of lock mechanism for the base inner shell. Additionally, with a right turn screw, at end of life, turning out an old lamp out of the fixture can lead to loss of the screw connection if the lock mechanism breaks.
  • Therefore in view of the above prior arts there is a need to provide a means for locking between base of glass lamp and base shell. Now the availability of high temperature plastics makes it possible to make the interface in plastic for HID lamps.
  • Thus, in the present invention, an improved fixation method of glass bulb to base (plastic housing) is provided.
    • OBJECTS OF THE INVENTION
  • Primary object of the present invention is to provide an improved lamp assembly having a screw-able self locking interface between a plastic housing and a glass bulb base.
  • Another object of the present invention is to provide an easy, clean and cost effective connection process without cement, glue or welding.
  • Yet another object of the present invention is to provide left turn screw for mechanical fixation for turning a lamp out of the fixture so as to prevent the lamp base shell from separating from the lamp base.
  • Yet another object of the present invention is to prevent sudden separation of glass bulb from the plastic base shell.
  • Still another object of the present invention is to provide an improved lamp base which is cost effective and provides an efficient assembly line operation.
  • Still another object of the present invention is to provide a simple and cost effective base end structure for electric lamps or similar devices.
  • Other objects and advantages of the invention will appear to those skilled in the art to which it appertains as the description proceeds, both by direct recitation thereof and by implication from the context.
    • SUMMARY OF THE INVENTION
  • Lamp assemblies according to the present invention are defined by claims 1 to 3. Preferred embodinments are set out in the dependent claims 4 to 9.
    • BRIEF DESCRIPTION OF THE ACCOMPANYING DRAWINGS
  • Further objects and advantages of this invention will be more apparent from the ensuing description when read in conjunction with the accompanying drawings and wherein:
    • FIG. 1a and 1b show:
    base of the lamp and base shell structure according to the present invention;
    FIG. 2a shows:
    lamp base shell having knops on the ring and saw teeth structure in the base;
    FIG. 2b shows:
    click fingers in the base (plastic housing) for ratchet mechanism according to another embodiment of the present invention;
    Figure 3 shows:
    holes in the base and click fingers on the ring for ratchet mechanism according to another embodiment of the present invention;
    Figure 4 shows:
    holes in the ring for ratchet mechanism and left turn screw according to another embodiment of the present invention.
    DETAIL DESCRIPTION OF THE INVENTION WITH REFERENCE TO THE ACCOMPANYING DRAWINGS
  • The present invention is directed to an improved lamp assembly. The lamp structure of instant invention comprising a glass lamp secured into base shell to form an improved lamp assembly. Now, reference may be made to fig. 1a indicating lower part of glass lamp (10), base (11) of which is provided with a plurality of dimples (12).
  • Reference may be made to fig. 1b showing base shell (13) in accordance with the present invention. Said base shell is having multitude of knops (15) to be clicked in the corresponding glass dimples (12).
  • The lamp base shell further comprises a cylindrical body having left turn screw (14), in which top of the cylindrical body is mounted with a number of knops along its circumference. Said base shell is secured to the lamp base (11) manually by placing it over the base (11) until the dimples (12) are mated with the corresponding knops (15) in the lamp base shell (13). The lamp base shell (13) is provided with left turn screw (14) for mechanical fixation for turning the lamp (10) out of the fixture so as to prevent the lamp base shell (13) from separating from the base (17) as shown in fig 2b. The base (17) constitutes a housing, which is preferably made of plastic. The plastic is again high temperature plastic to sustain high temperature during operation of the lamp i.e. when the lamp is switched on.
  • The lamp base shell (13) has saw teeth (16) on the other side where lamp is not attached. Said saw teeth are disposed along the circumference of the lamp base shell (13) as locking mechanism for use in a ratchet mechanism with the base (17), in which the base (17) has the provision of a number of click fingers (18) for ratchet mechanism as in fig. 2a and 2b.
  • According to another embodiment of the present invention, a plurality of holes (19) are provided in the base (17) and click fingers (18) on the lamp base shell (13) for ratchet mechanism as shown in fig. 3.
  • According to still another embodiment of the present invention, a multitude of holes (20) can be provided in the lamp base shell (13) and click fingers (18) are located on the base (plastic housing) (17) for ratchet mechanism as shown in fig.4.
    • Advantageous Features
    • An easy, clean and cost effective connection process without cement, glue or welding.
    • Cost effective lamp assembly, which provides an efficient assembly line operation.
    • Simple and inexpensive base end structure for electric lamps or similar devices.

Claims (9)

  1. A lamp assembly comprising a lamp base shell (13), forming a screwable self locking interface between a base (17) and a lamp base (11) of a glass lamp (10) provided with a plurality of dimples (12), characterized in that the lamp base shell (13) comprises
    - a cylindrical body having a left turn screw (14) the top of which is mounted with a plurality of knops (15) along its circumference to be clicked in the corresponding dimples (12) and
    - saw teeth (16) forming a locking mechanism for use in a ratchet mechanism with the base (17).
  2. A lamp assembly comprising a lamp base shell (13), forming a screwable self locking interface between a base (17) and a lamp base (11) of a glass lamp (10) provided with a plurality of dimples (12), characterized in that the lamp base shell (13) comprises
    - a cylindrical body having a left turn screw (14) the top of which is mounted with a plurality of knops (15) along its circumference to be clicked in the corresponding dimples (12) and
    - a plurality click fingers (18) forming a locking mechanism for use in ratchet mechanism with the base (17).
  3. A lamp assembly comprising a lamp base shell (13), forming a screwable self locking interface between a base (17) and a lamp base (11) of a glass lamp (10) provided with a plurality of dimples (12), characterized in that the lamp base shell (13) comprises
    - a cylindrical body having a left turn screw (14) the top of which is mounted with a plurality of knops (15) along its circumference to be clicked in the corresponding dimples (12) and
    - a multitude of holes (19) forming a locking mechanism for use in ratchet mechanism with the base (17).
  4. A lamp assembly as claimed in any of claims 1 to 3, characterized in that the lamp base shell (13) is preferably made of plastic.
  5. A lamp assembly as claimed in any of claims 1 to 4, characterized in that the plurality of dimples (12) on the lamp base (11) of the glass lamp (10) is mated with the corresponding plurality of knops (15) in the lamp base shell (13).
  6. A lamp assembly as claimed in any of the preceding claims, characterized in that the left turn screw (14) provides a mechanical fixation for turning the lamp out of the fixture so as to prevent the lamp base shell (13) from separating from its base (17).
  7. A lamp assembly as claimed in claim 1, characterized in that the base (17) constitutes a housing having a plurality of click fingers (18) for the ratchet mechanism.
  8. A lamp assembly as claimed in claim 2, characterized in that a plurality of holes (19) in the base (17) are provided for the ratchet mechanism.
  9. A lamp assembly as claimed in claim 3, wherein click fingers (18) are located on the base (17) for ratchet mechanism.
EP15178889.0A 2014-07-30 2015-07-29 An improved lamp assembly Active EP2980828B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IN2146DE2014 2014-07-30

Publications (2)

Publication Number Publication Date
EP2980828A1 EP2980828A1 (en) 2016-02-03
EP2980828B1 true EP2980828B1 (en) 2018-12-19

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ID=54007493

Family Applications (1)

Application Number Title Priority Date Filing Date
EP15178889.0A Active EP2980828B1 (en) 2014-07-30 2015-07-29 An improved lamp assembly

Country Status (1)

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EP (1) EP2980828B1 (en)

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4029387A (en) * 1975-11-24 1977-06-14 Eager John W Electric lamp base and method of assembly
US5382869A (en) 1992-11-24 1995-01-17 Osram Sylvania Inc. Lamp base inner shell
AUPM533494A0 (en) * 1994-04-27 1994-05-19 ACMA Technologies Pte. Limited Improvements in, or relating to lamps
US6969947B2 (en) 2000-06-29 2005-11-29 General Electric Company Lead free base locking mechanism
CN201804843U (en) * 2010-09-06 2011-04-20 中山市欧帝尔电器照明有限公司 Welding-free lamp holder
US8421320B2 (en) 2011-01-24 2013-04-16 Sheng-Yi CHUANG LED light bulb equipped with light transparent shell fastening structure
JP6045584B2 (en) * 2011-08-02 2016-12-14 フィリップス ライティング ホールディング ビー ヴィ Anti-theft lamp

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

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Publication number Publication date
EP2980828A1 (en) 2016-02-03

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