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EP3032164A1 - Rohrförmige Beleuchtungsvorrichtung und Endkappe für solch eine Beleuchtungsvorrichtung - Google Patents

Rohrförmige Beleuchtungsvorrichtung und Endkappe für solch eine Beleuchtungsvorrichtung Download PDF

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Publication number
EP3032164A1
EP3032164A1 EP14197539.1A EP14197539A EP3032164A1 EP 3032164 A1 EP3032164 A1 EP 3032164A1 EP 14197539 A EP14197539 A EP 14197539A EP 3032164 A1 EP3032164 A1 EP 3032164A1
Authority
EP
European Patent Office
Prior art keywords
end cap
tooth
slot
lighting device
tubular
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.)
Ceased
Application number
EP14197539.1A
Other languages
English (en)
French (fr)
Inventor
designation of the inventor has not yet been filed The
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.)
Koninklijke Philips NV
Original Assignee
Koninklijke Philips NV
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 Koninklijke Philips NV filed Critical Koninklijke Philips NV
Priority to EP14197539.1A priority Critical patent/EP3032164A1/de
Publication of EP3032164A1 publication Critical patent/EP3032164A1/de
Ceased legal-status Critical Current

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Classifications

    • 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
    • F21V23/00—Arrangement of electric circuit elements in or on lighting devices
    • F21V23/06—Arrangement of electric circuit elements in or on lighting devices the elements being coupling devices, e.g. connectors
    • 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
    • F21K9/27—Retrofit light sources for lighting devices with two fittings for each light source, e.g. for substitution of fluorescent tubes
    • 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
    • F21K9/27—Retrofit light sources for lighting devices with two fittings for each light source, e.g. for substitution of fluorescent tubes
    • F21K9/272—Details of end parts, i.e. the parts that connect the light source to a fitting; Arrangement of components within end parts
    • 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
    • F21K9/60—Optical arrangements integrated in the light source, e.g. for improving the colour rendering index or the light extraction
    • F21K9/65—Optical arrangements integrated in the light source, e.g. for improving the colour rendering index or the light extraction specially adapted for changing the characteristics or the distribution of the light, e.g. by adjustment of parts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/10—Light-emitting diodes [LED]

Definitions

  • This invention relates to a tubular lighting device, and also to an end cap for such a lighting device.
  • SSL Solid state lighting
  • Tubular lighting devices are widely used in office lighting applications. Traditionally, fluorescent tube lighting has been used. There are therefore many existing lighting fittings designed for receiving a fluorescent light tube.
  • a traditional fluorescent light tube has a pair of connector pins at each end. To fit the light tube into a light fitting, the two pins are aligned with a slot in the fitting, pushed into place, and then rotated by 90 degrees to complete the mechanical and electrical connection.
  • the fluorescent light tubes are generally circular in cross section and they emit light substantially radially uniformly in all directions.
  • the light fitting generally comprises a reflector arrangement to redirect the light to create a desired lighting profile.
  • Typical tubular LED lamps comprise an end cap which carries the external pin connector, and the end cap connects to the internal driver board and LED board within the tubular housing of the lamp.
  • LED lighting offers many more design options, including more efficient directional lighting.
  • a tubular LED lamp with a directional light output i.e. one which is not uniform in all radial directions
  • a particular orientation of the external connector pins with respect to the tubular housing of the lamp is required.
  • CN 103256569A discloses a rotary LED lamp holder having an internal wire connection between external connector pins and the LED lamp.
  • the use of a twisting wire presents potential problems of wear and tear and therefore premature failure.
  • an end cap for a tubular lighting device comprising:
  • the relative rotation provided between the two parts of the end cap enables the rotational position of the external electrical connector to be adjusted, so that a tubular lighting device having the end caps can be mounted in a desired rotational position relative to the lighting fitting. This may be important for light sources which have a directional output, for example non-circular tubular lighting device.
  • the plug and socket design enables simple assembly, and it enables rotation while maintaining good electrical contact and avoiding wear and tear.
  • the internal rotatable plug and socket electrical connector may comprise a pin with at least two electrical contact rings at different positions along the length of the pin and each surrounding the pin, and at least two corresponding spring contacts which are biased towards the electrical contact rings.
  • This pin can be in the form of a jack plug, for example similar to a headphone jack plug.
  • This is rotatable while maintaining electrical contact.
  • the spring contacts together define a socket arrangement.
  • other rotatable connectors maybe used, such as a coaxial connector with a central pin and a surrounding concentric annular electrical contact.
  • the pin may be coupled to the second part of the end cap and project along the axis of relative rotation, and the spring contacts are then coupled to the first part of the end cap.
  • the pin may be coupled to the first part of the end cap and project along the axis of relative rotation, and the spring contacts are then coupled to the second part of the end cap.
  • the external electrical connector may comprise a pin arrangement which is electrically connected to the rotatable electrical connector.
  • the external connector pin arrangement is designed to mate with the light fitting.
  • the external electrical connector for example comprises two pins projecting in parallel with the axis of relative rotation, spaced apart on each side of the rotation axis. This means the pin positions depend on the rotational orientation.
  • This is the standard connector arrangement for a tubular light such as a T5 tubular light fitting.
  • the first part may comprise a first tooth or slot arrangement and the second part may comprise a second tooth or arrangement, wherein the first and second tooth or slot arrangements interlock to define a plurality of rotational orientations.
  • These teeth and/or slots can be used to provide locking of the end cap with the chosen rotational position, instead of relying on friction alone.
  • the number of teeth/slots will be selected to give a desired range and number of adjustments.
  • one of the first and second tooth or slot arrangements comprises a single tooth or slot and the other of the first and second tooth arrangements comprises a plurality of slots or teeth.
  • a slot on one part engages with one of a plurality of teeth on the other part, or else a tooth on one part engages with one of a plurality of slots on the other part.
  • the end cap may comprise a mechanically actuated button for decoupling the first and second tooth or slot arrangements to allow the relative rotation between the first and second parts. This provides a secure way of fixing the end cap in a chosen rotational position.
  • the mechanically actuated button may be spring-loaded, wherein the button is adapted to be depressed to decouple the first tooth or slot arrangement from the second tooth arrangement, and is adapted to be released to recouple the first and second tooth or slot arrangements. This provides an easy to use adjustment mechanism for the user.
  • the first and second parts may instead be slidable relative to each other along a direction parallel to the axis of relative rotation between first and second configurations, wherein in the first configuration the first and second tooth or slot arrangements are decoupled to allow the relative rotation between the first and second parts, and in the second configuration the first and second tooth or slot arrangements are interlocked to prevent the relative rotation between the first and second parts.
  • the invention also provides a tubular lighting device, comprising:
  • the light source for example comprises an LED arrangement
  • the tubular housing may have a non-circular cross sectional shape, for example an oval shape, in cross section perpendicular to the tubular housing elongate axis.
  • the invention provides an end cap for a tubular lighting device which comprises first and second parts which are rotatable relatively to each other. One part carries an external connector and the other part connects to a tubular lighting device housing. The two parts are electrically connected together via an internal rotatable plug and socket electrical connector, internal to the end cap.
  • Figure 1 shows a basic known tubular LED lamp 10, comprising a tubular housing 12 having an end cap 14 at each end (only one is shown).
  • the end cap carries external connectors 16 in the form of two pins offset to each side from a central axis of the end cap 14, parallel to the elongate axis of the tubular housing 12.
  • the end cap 14 connects electrically to the internal driver board and LED board inside the tubular housing 12.
  • the lamp has a directional output and in this example has a non-circular cross sectional shape. Note that even with a circular tubular shape, the light output may still be directional.
  • the directional output means there is a preferred angular orientation, which in the example shown is with the long axis of the elliptical cross section in a vertical direction.
  • Figure 2 shows the lamp fitted to a fitting 20 which is suitable for the lamp design.
  • the two pins 16 are aligned with a slot 22 of the fitting, and then the lamp is slid into place (left image). It is then rotated by 90 degrees to complete the electrical and mechanical connection (right image).
  • Figure 3 shows a light fitting with a slot at 45 degrees to the vertical. As shown, after inserting the lamp of Figure 1 (left image) and twisting it (right image), the light output beam 23 is not downwardly directed as desired.
  • Figure 4 shows how to address this problem, by providing an end cap which allows rotation of the external connector 16. Before or during fitting, the end cap is twisted so that after installation, the light output beam 23 faces downwardly as shown in the right image. The left image shows the twisting having taken place to the desired orientation, before insertion into the slot.
  • Figure 5 shows an end cap 14 applied to a tubular housing 12 of a lighting device.
  • the end cap has a first part 14a having the external electrical connector 16 for making mechanical and electrical connection to the light fitting.
  • a second part 14b is for making mechanical connection to the end of the tubular housing 12 and electrical connection to the light source (not shown) inside the tubular housing 12.
  • the first and second parts are rotatable relatively to each other, and electrically connected together via an internal rotatable plug and socket electrical connector.
  • the relative rotation enables the rotational position of the external electrical connector to be adjusted.
  • Figure 6 shows a first example of the internal parts of the design in Figure 5 .
  • the internal connector comprises a male pin part 20 and a female socket part.
  • the male pin part 20 has two electrical contact rings at different positions along the pin length, in the form of a jack plug.
  • the female socket comprises first and second corresponding spring contacts 22 and 24 which are biased towards the electrical contact rings. This is the form of a female jack socket.
  • the first spring contact 22 is coupled to a ring 26 for fixing to one of the external connector pins 16 and the second spring contact 24 is coupled to a ring 28 for fixing to the other of the external connector pins 16.
  • rotatable connectors may be used, such as a coaxial connector with a central pin and one or more surrounding concentric annular electrical contacts.
  • a first solid member functioning as a male plug part
  • a second solid member functioning as a female socket part
  • the two parts can rotate relatively to each other. This provides an arrangement which is not prone to wearing, as the electrical contact is formed between two solid metal surfaces which can be biased against each other, or can be a tight fit with each other.
  • the pin 20 is coupled to the second part 14b of the end cap and projects along the axis of relative rotation, and the spring contacts 22, 24 are then coupled to the first part 14a of the end cap.
  • the pin maybe coupled to the first part 14a of the end cap and project along the axis of relative rotation and the spring contacts 22, 24 are then coupled to the second part of the end cap.
  • the second part 14b has a toothed wheel 30. This can engage with a corresponding single tooth, or set of teeth, or another complete toothed wheel (not shown) in the first part 14a to define a set of possible relative rotational positions.
  • Figure 7 shows more clearly the spring contacts 22,24 each connected to a respective pin 16, and it shows the contact rings of the pin 20 as cross hatched areas.
  • the adjustment of the relative rotational position of the two parts 14a, 14b is carried out manually. There are various possible ways to implement the manual adjustment.
  • Figures 8 and 9 show a second design with a push button which is pushed radially in.
  • Figure 8 shows the second design in an unlocked position during which adjustment can be made and
  • Figure 9 shows the design in a locked position.
  • Each of Figures 8 and 9 shows a plan view, an end view in cross section and a side view in cross section.
  • the first part 14a has a first tooth or slot arrangement, which in this example comprises an array of slots 40.
  • the slots do not cover a full 360 degree angle, and in this example there are five slots which cover only 90 degrees.
  • the second part 14b has a second tooth or slot arrangement which in this example comprises a single tooth 42.
  • the tooth 42 can move be moved radially in and out by means of a button 44.
  • the tooth 42 engages radially outwardly with an aligned slot 40, and is biased radially outwardly by a spring 46.
  • the button 44 can be pushed in against the spring bias to release the tooth 42 from the slot 40 and thereby enable the relative rotation between the two parts 14a, 14b.
  • Figure 8 shows the tooth 42 in the depressed position so that the two parts 14a, 14b are unlocked and Figure 9 shows the tooth in the spring biased engaged position so that the two parts are locked.
  • Figure 10 shows a third design in which a release button 50 is pushed in an axial direction to release the two parts 14a, 14b to allow relative rotation.
  • Figure 10 shows the push button 50 depressed so that the two parts 14a, 14b are unlocked.
  • Figure 11 shows the design of Figure 10 in the same depressed position and shows a plan view, an end view in cross section and a side view in cross section.
  • the end of the push button 50 carries a tab which functions as a single tooth 42, which again engages with one of the slots 40 in the first part 14a to prevent relative rotation.
  • the button is biased to the engaged position by the elasticity of the material from which the end cap is made, such as a plastics material.
  • Figure 12 shows the same design with the push button 50 sprung back to its locked position.
  • Figure 13 shows the design of Figures 10 and 12 in the same locked position and again shows a plan view, an end view in cross section and a side view in cross section.
  • the tooth 42 projects axially into one of the slots 40 to prevent relative rotation.
  • Figure 14 shows a first configuration in which the first and second tooth or slot arrangements are decoupled to allow the relative rotation between the first and second parts 14a, 14b.
  • Figure 15 shows a second configuration in which the first and second tooth or slot arrangements are interlocked to prevent the relative rotation between the first and second parts 14a, 14b.
  • the first part 14a has an outer sleeve 60 which overlaps a collar of the second part 14b.
  • the first part 14a in this example has a single tooth 42 for engaging with one slot of a slot ring 40 which forms part of the second part 14b.
  • the sleeve 60 of the first part 14a has a ribbed inner surface which engages with a ribbed outer surface of the collar. In this way, the sleeve 60 is a snap fit into the two different positions as shown in Figures 14 and 15 . In each of these positions, a projection engages with a recess where the sleeve and collar are coupled. The engagement is enough that a force is needed to slide the sleeve between the two positions which is greater that will be experienced in normal use. The sleeve resists complete removal as a result of a one-way step part 62.
  • This step part allows the first part 14a to be a push fit over the second part 14b during assembly (and the toothed ring 40 will deform radially inwardly during this assembly), but it then resists removal of the first part 14a.
  • the first part 14a In the locked configuration of Figure 15 , the first part 14a reaches a stop 64 defined by the interaction between the ribbed inner and outer surfaces.
  • Figure 16 shows the internal connections made by the first part 14a between the pins 16 and the first and second spring contacts 22, 24.
  • the double external pin is 180 degree symmetric in any case, so that all possible relative orientations can be achieved with 180 degree relative rotation and by selecting which way around to insert the pins 16 into the slot.
  • the twisting movement to lock the lamp into the fitting i.e. the twisting that takes place between the left and right parts of Figure 2
  • the twisting movement to lock the lamp into the fitting may be allowed in both rotational directions.
  • all possible relative orientations can be achieved with only a 90 degree range of relative rotation between the first and second parts 14a, 14b, by choosing the orientation to insert into the slots and the direction to rotate the fitting.
  • a frictional engagement may instead be used, or a ratchet mechanism which allows clicked rotation in one angular direction.
  • a polygonal male part may engage with a polygonal female part.
  • a hexagon feature on one part may engage with a hexagon feature on the other part to define six possible angular orientations.
  • the internal plug and socket is generally a concentric arrangement which allows full 360 degree relative rotation between the plug and socket parts.
  • a tubular lighting device using the end cap has a tubular housing, a light source within the tubular housing and an end cap at each end of the tubular housing.
  • the light source for example comprises an LED arrangement
  • the tubular housing may have a non-circular cross sectional shape, for example an oval shape, in cross section perpendicular to the tubular housing elongate axis. However, it may have a circular cross section but a light output which is not rotationally symmetric.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Optics & Photonics (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
EP14197539.1A 2014-12-12 2014-12-12 Rohrförmige Beleuchtungsvorrichtung und Endkappe für solch eine Beleuchtungsvorrichtung Ceased EP3032164A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP14197539.1A EP3032164A1 (de) 2014-12-12 2014-12-12 Rohrförmige Beleuchtungsvorrichtung und Endkappe für solch eine Beleuchtungsvorrichtung

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP14197539.1A EP3032164A1 (de) 2014-12-12 2014-12-12 Rohrförmige Beleuchtungsvorrichtung und Endkappe für solch eine Beleuchtungsvorrichtung

Publications (1)

Publication Number Publication Date
EP3032164A1 true EP3032164A1 (de) 2016-06-15

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Family Applications (1)

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EP14197539.1A Ceased EP3032164A1 (de) 2014-12-12 2014-12-12 Rohrförmige Beleuchtungsvorrichtung und Endkappe für solch eine Beleuchtungsvorrichtung

Country Status (1)

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EP (1) EP3032164A1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102017120067A1 (de) * 2017-08-31 2019-02-28 Ledvance Gmbh Lampe mit drehbarem Sockel
US11460154B2 (en) * 2019-01-31 2022-10-04 Xiamen Pvtech Co., Ltd. Holeless rotary lamp cap

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008136458A1 (ja) * 2007-05-01 2008-11-13 Sharp Kabushiki Kaisha 照明装置及び該照明装置を用いた灯器具
US20090091929A1 (en) * 2007-10-05 2009-04-09 Faubion Associates, Inc. Directional l.e.d. lighting unit for retrofit applications
JP2011070985A (ja) * 2009-09-28 2011-04-07 Idec Corp 発光装置
US20110085335A1 (en) * 2008-06-17 2011-04-14 Rohm Co., Ltd. Led lamp
DE102010017573A1 (de) * 2010-02-04 2011-08-04 DEWINCI GmbH, 46483 Lampe mit zwei parallel zueinander verlaufenden, drehbar an einem Sockel gelagerten Lampenkörpern mit Leuchtdioden
US8066411B1 (en) * 2009-07-15 2011-11-29 Reled Systems Llc LED lighting tube with rotational end caps
CN103256569A (zh) 2012-02-17 2013-08-21 重庆四联光电科技有限公司 旋转式led日光灯灯头
US20130250565A1 (en) * 2012-03-20 2013-09-26 Wen-Hsing Chiang Lamp module and connection mechanism thereof

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008136458A1 (ja) * 2007-05-01 2008-11-13 Sharp Kabushiki Kaisha 照明装置及び該照明装置を用いた灯器具
US20090091929A1 (en) * 2007-10-05 2009-04-09 Faubion Associates, Inc. Directional l.e.d. lighting unit for retrofit applications
US20110085335A1 (en) * 2008-06-17 2011-04-14 Rohm Co., Ltd. Led lamp
US8066411B1 (en) * 2009-07-15 2011-11-29 Reled Systems Llc LED lighting tube with rotational end caps
JP2011070985A (ja) * 2009-09-28 2011-04-07 Idec Corp 発光装置
DE102010017573A1 (de) * 2010-02-04 2011-08-04 DEWINCI GmbH, 46483 Lampe mit zwei parallel zueinander verlaufenden, drehbar an einem Sockel gelagerten Lampenkörpern mit Leuchtdioden
CN103256569A (zh) 2012-02-17 2013-08-21 重庆四联光电科技有限公司 旋转式led日光灯灯头
US20130250565A1 (en) * 2012-03-20 2013-09-26 Wen-Hsing Chiang Lamp module and connection mechanism thereof

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102017120067A1 (de) * 2017-08-31 2019-02-28 Ledvance Gmbh Lampe mit drehbarem Sockel
US10495264B2 (en) 2017-08-31 2019-12-03 Ledvance Gmbh Rotateable endcap / base for tube lamps
DE102017120067B4 (de) 2017-08-31 2022-09-15 Ledvance Gmbh Lampe mit drehbarem Sockel
US11460154B2 (en) * 2019-01-31 2022-10-04 Xiamen Pvtech Co., Ltd. Holeless rotary lamp cap

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