EP3495727B1 - Sicherheits-endkappenanordnung für led leuchtröhre - Google Patents

Sicherheits-endkappenanordnung für led leuchtröhre Download PDF

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Publication number
EP3495727B1
EP3495727B1 EP17206276.2A EP17206276A EP3495727B1 EP 3495727 B1 EP3495727 B1 EP 3495727B1 EP 17206276 A EP17206276 A EP 17206276A EP 3495727 B1 EP3495727 B1 EP 3495727B1
Authority
EP
European Patent Office
Prior art keywords
endcap
switch button
safety
cover element
spring
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
EP17206276.2A
Other languages
English (en)
French (fr)
Other versions
EP3495727A1 (de
Inventor
Tom HILGERINK
Martijn Jeroen Dekker
Charlie Minter
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.)
Silicon Hill BV
Original Assignee
Silicon Hill 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 Silicon Hill BV filed Critical Silicon Hill BV
Priority to EP17206276.2A priority Critical patent/EP3495727B1/de
Priority to CN201880079180.3A priority patent/CN111448421B/zh
Priority to PCT/EP2018/084050 priority patent/WO2019110829A1/en
Publication of EP3495727A1 publication Critical patent/EP3495727A1/de
Application granted granted Critical
Publication of EP3495727B1 publication Critical patent/EP3495727B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F21V25/00—Safety devices structurally associated with lighting devices
    • F21V25/02—Safety devices structurally associated with lighting devices coming into action when lighting device is disturbed, dismounted, or broken
    • F21V25/04—Safety devices structurally associated with lighting devices coming into action when lighting device is disturbed, dismounted, or broken breaking the electric circuit
    • 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
    • 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
    • F21V23/04—Arrangement of electric circuit elements in or on lighting devices the elements being switches
    • 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
    • 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
    • H01R13/02—Contact members
    • H01R13/22—Contacts for co-operating by abutting
    • H01R13/24—Contacts for co-operating by abutting resilient; resiliently-mounted
    • H01R13/2407—Contacts for co-operating by abutting resilient; resiliently-mounted characterized by the resilient means
    • H01R13/2421—Contacts for co-operating by abutting resilient; resiliently-mounted characterized by the resilient means using coil springs
    • 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
    • H01R33/74—Devices having four or more poles, e.g. holders for compact fluorescent lamps
    • H01R33/76—Holders with sockets, clips, or analogous contacts adapted for axially-sliding engagement with parallely-arranged pins, blades, or analogous contacts on counterpart, e.g. electronic tube socket
    • H01R33/7692—Holders with sockets, clips, or analogous contacts adapted for axially-sliding engagement with parallely-arranged pins, blades, or analogous contacts on counterpart, e.g. electronic tube socket for supporting a tubular fluorescent lamp
    • 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
    • F21Y2103/00—Elongate light sources, e.g. fluorescent tubes
    • F21Y2103/10—Elongate light sources, e.g. fluorescent tubes comprising a linear array of point-like light-generating elements
    • 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]
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/02—Operating parts, i.e. for operating driving mechanism by a mechanical force external to the switch
    • H01H3/20—Operating parts, i.e. for operating driving mechanism by a mechanical force external to the switch wherein an auxiliary movement thereof, or of an attachment thereto, is necessary before the main movement is possible or effective, e.g. for unlatching, for coupling

Definitions

  • the present invention relates to a safety endcap assembly for use in a light emitting diode (LED) lamp arrangement, which is arranged to replace a fluorescent lamp in a luminaire.
  • LED light emitting diode
  • LED-based lamps which can be used as one-for-one replacements for fluorescent tube lamps, have emerged in recent years.
  • Such LED-based replacement lamps typically include an elongate housing, with LEDs mounted on a circuit board inside the housing. An endcap is arranged at each longitudinal end of the housing for connecting the LED circuit board to the luminaire.
  • Arcing is an electrical breakdown of a gas that produces an ongoing electrical discharge. This occurs when two or more conductors in a circuit are not properly contacted. When there is a small gap between these conductors, the voltage across them could break down the gas resistance and create a current-as a small scale lightning. This current is typically high enough to increase the temperature of the components of the LED lamp, e.g. the circuit board of LEDs. This increase of temperature entails the risk of the melting of the LED lamp and the risk of fire and burn hazards.
  • Patent publication DE 10 2915 204 716 discloses a tube lamp with an resilient end cap and pressure element to address the problem of the lamp falling out of the fixture and arcing between the lamp and the fixture.
  • EP 3 069 077 discloses a safety end cap assembly comprising a switch button which is displaceable between an open position in which the switch is in its open state and a closed position in which the switch is in its closed state, wherein a spring mechanism urges the switch button towards its open position.
  • a first aspect of the invention concerns a safety endcap assembly according to claim 1.
  • the safety endcap assembly is arranged at an end of an LED lamp having a plurality of LEDs.
  • the safety endcap assembly comprises:
  • the switch button is a physical element which is arranged to be moved (e.g. by a user) to a certain position, i.e. the first position, to disconnect the contact element from the LEDs to block the electrical connection between the contact element and the LEDs.
  • the switch button preferably comprises a plate-like portion.
  • the plate-like portion may have a circular shape (e.g. a disk-like shape) or any other shape, such as a rectangular, triangular, polygonal or irregular shape.
  • the switch button may be made of an insulating material such as plastic.
  • the movement of the switch button may include (but is not limited to) a rotation movement, a displacement movement, or a combination thereof.
  • the switch button is arranged to disconnect the contact element from the LEDs when the switch button is in the first position.
  • the switch button may be arranged in such a way that, as long as the switch button is in the first position, the contact element is disconnected from the LEDs. In this way, a safe user operation during installation can be achieved. As long as the switch button is in the first position, the user can trust that the lamp will not conduct electrical current.
  • This feature also allows an arrangement of an arcing prevention mechanism, e.g. moving the switch button to the first position to disconnect the electrical connection when the risk of arcing increases.
  • the safety endcap assembly further comprises:
  • the first spring mechanism comprises a spring which can be any type of elastic objects that store mechanical energy.
  • the spring include a coil spring, rubber, a gas spring, etc. In this way, the mechanical energy stored in the spring can be used to move the endcap cover element relative to the endcap base element to urge the endcap cover element towards the protracted position.
  • the switch opening mechanism may use one or more of any mechanisms described in US 2016/0290606 A1 .
  • the first spring mechanism makes it possible to move the endcap cover element in accordance with the gradual shape change of the fixture, and once this movement reaches the predetermined distance, the switch opening mechanism can disconnect the contact element from the LEDs to reduce the risk of arcing.
  • the switch opening mechanism is configured such that in case the switch button is in the second position, and the endcap cover element moves from the retracted position towards the protracted position over the predetermined distance, the switch button is switched to the first position within 0.5 second.
  • This time period may be achieved, for example, using a spring biased against the switch button in the second position. The short time period makes it possible to reliably control the risk of arcing.
  • the contact element is connected to the connector pin via a spring which defines a variable length.
  • the variable length includes a first length, in which the spring is less compressed i.e. when the spring is in an uncompressed natural state in an abscence of external force, and a second length, in which the spring is in a compressed state, i.e. when the endcap cover element is in the retracted position and the switch button is in the second position; and the first length, the second length and the predetermined distance are arranged to satisfy a following inequality: D ⁇ A ⁇ B , where D is the predetermined distance, A is the first length, and B is the second length.
  • the spring may be any type of elastic objects that store mechanical energy, such as a coil spring, rubber, a gas spring, etc.
  • the predetermined distance (which triggers the switch opening mechanism) is smaller than the tolerance of the safety endcap assembly within which the contact element and the LEDs can still be reliably connected, the risk of arcing can be further reduced.
  • the safety endcap assembly comprises two connector pins, two contact elements, and two springs. Each spring connects a connector pin to a respective contact element.
  • This two-pin configuration is similar to conventional fluorescent lamps, thus allowing a simple manner for the user to install the LED lamp arrangement into the luminaire.
  • the switch button comprises a hole, wherein, in the first position, the hole is not aligned with the contact element (and preferably also the connector pin) in the axis, and in the second position, the hole is aligned with the contact element (and preferably also the connector pin) in the axis.
  • the contact element may extend through the hole of the switch button (e.g. to come into contact with an electrode which is connected to the LEDs.
  • the contact element can be physically blocked to prevent an electrical connection or a small gap with an electrode which connects to the LEDs, and can thus reliably reduce the risk of arcing by moving the switch button to the first position.
  • the switch button comprises a first surface and a second surface, wherein the first surface and the second surface are substantially perpendicular to a direction in which the contact element extends (e.g. the axis of the connector pin).
  • a distance between the first surface and the second surface is preferably at least 0.4 mm. This distance ensures that the risk of arcing is low when the contact element is blocked in the first position of the switch button.
  • the switch button comprises a hole forming a third surface extending from the first surface or from the second surface (e.g. extending from the first surface to the second surface).
  • the third surface preferably forms an angle less than 60 degrees with respect to the first surface or the second surface.
  • the third surface can form an edge which is sharp enough to cut into a contact between the contact element and an electrode connecting to the LEDs. This allows the switch button to force itself into the first position for disconnecting the contact element from the LEDs to reduce the risk of arcing.
  • the switch opening mechanism comprises:
  • the second spring mechanism may comprise a spring which may be any type of elastic objects that store mechanical energy.
  • the spring include a coil spring, rubber, a gas spring, etc. In this way, the mechanical energy stored in the second spring mechanism can be used to force the switch button into the first position when the risk of arcing increases.
  • the switch opening mechanism may comprise an cantilevered beam or a torsion spring (e.g. in the second spring mechanism). In this way, the switch opening mechanism can be implemented in an simple and inexpensive manner.
  • the switch opening mechanism may comprise an elongated protrusion or recess (e.g. in the switch arresting mechanism) for arresting the switch button, wherein the protrusion or recess has a length substantially equal to the predetermined distance.
  • This physical implementation of the predetermined distance can allow the switch opening mechanism to be triggered reliably.
  • the switch button in the protracted position, is covered by the endcap cover element, and in the retracted position the switch button is exposed. This increases the user safety during the installation.
  • the safety endcap may further be configured such that the LEDs are only connected to the connector pin when the endcap cover element is in the retracted position and the switch button is in the second position. This mechanism adds another layer of security.
  • a second aspect of the invention concerns an LED lamp arrangement configured to be fit in a lamp fixture, the LED lamp arrangement comprising:
  • the switch button comprises a hole, wherein, when the endcap cover element is in the retracted position and the switch button is in the second position, the contact element extends through the hole of the switch button to come into contact with the electrode.
  • the switch button comprises a first surface and a second surface, wherein the first surface and the second surface are substantially perpendicular to the axis, and wherein the contact between the contact element and the electrode is arranged in a space between the first surface and the second surface.
  • the switch button may comprise a hole forming a third surface extending from the first surface to the second surface, wherein the third surface forms an edge arranged to break the contact between contact element and the electrode.
  • the switch button may comprise a portion which forms a blade, and the contact between the contact element and the electrode and the blade defined by the switch button may be arranged in substantially the same cross-section.
  • the LED tube assembly does not fit in the lamp fixture; and with the endcap cover element in its retracted position the LED tube assembly fits in the lamp fixture. This increases the user safety.
  • a third aspect of the invention comprises a method for operating an LED lamp arrangement comprising a safety endcap assembly according to the first aspect of the invention, in a luminaire, the method comprising:
  • Fig. 1 shows an embodiment of the LED lamp arrangement 1 according to the invention.
  • the LED lamp arrangement 1 comprises a housing 3, a plurality of LEDs arranged in the housing 3, a first endcap assembly 9 and a second endcap assembly 25.
  • the second endcap assembly 25 is a safety endcap assembly 200 according to the invention.
  • the LED lamp 1 is an elongated tube, in which the housing 3 has an elongate shape.
  • the LED lamp 1 may also have other shapes, such as a circular shape.
  • Figs. 2A-2C show an embodiment of the safety endcap assembly 200 according to the invention. This embodiment may be used in the LED lamp arrangement 1 as shown in Fig. 1 .
  • the safety endcap assembly 200 comprises two connector pins 205, 207 a switch button 213, an endcap base element 201 to be arranged at an end of the housing 3 of the LED lamp 1, and an endcap cover element 203.
  • the endcap base element 201 and an endcap cover element 203 may be arranged to move relative to each other.
  • the endcap cover element 203 is arranged to slide along a circumferential wall 201b of the endcap base element 201.
  • the relative movement between the endcap base element 201 and the endcap cover element 203 defines a protracted position (as shown in Fig. 2A ), and a retracted position (as shown in Figs. 2B and 2C ). In the protracted position, the endcap cover element 203 is more away from the endcap base element 201; in the retracted position, the endcap cover element 203 is closer to the endcap base element 201.
  • the switch button 213 is moveable in two or more positions, including a first position and a second position.
  • the movement may include (but is not limited to) a rotation movement.
  • the switch button 213 can be rotated from the first position (as shown in Figs. 2A and 2B ) to the second position (as shown in Fig. 2C ).
  • the safety endcap is configured such that the LEDs are only connected to the connector pins 205, 207 when both of the following conditions are met: (1) the endcap cover element 203 is in the retracted position, and (2) the switch button 213 is in the second position.
  • the advantage of this arrangement is two-fold. First, this provides a double security to the user. As long as the switch button 213 is in the first position, the user can feel free to install the lamp without having to worry about the electrical shock. Second, a mechanism can be added to move the switch button 213 from the second position to the first position (thereby disconnecting the LEDs from the connector pins) when there is an increasing risk of arcing. In this way, the risk of arcing can be reduced.
  • the switch button 213 is hidden, for example covered by a circumferential wall of the endcap cover element 203. This way provides an additional layer of safety for the installation, because it reduces the risk that user accidentally rotates the switch button 213.
  • the safety endcap assembly comprises two connector pins 205, 207.
  • the LED lamp arrangement 1 has two pins on each side, i.e. four pins in total, just like a typical fluorescent lamp. In this way the user can install the LED lamp in a simple manner just like in the case of fluorescent lamps.
  • the safety endcap assembly may have only one connector pin.
  • Figs. 3A-3D shows an operation of a similar embodiment of the safety endcap assembly according to the invention.
  • the safety endcap assembly in this embodiment may comprise one or more features of the embodiment in Figs. 2A - 2C .
  • Fig. 3A shows a default state in this embodiment.
  • the default state may be the state before the LED lamp is installed onto the fixture 302, 303 of the luminaire 301.
  • the default state corresponds to the state Fig. 2A , i.e. the endcap cover element 203 is in the protracted position, and the switch button 213 is in the first position. In this state, the LEDs are disconnected from the connector pins 205, 207.
  • Fig. 3B shows a state in which the LED lamp is placed into the luminaire.
  • this states is similar to the state in Fig. 2B , i.e. the endcap cover element 203 is in the retracted position, and the switch button 213 is in a first position.
  • the switch button 213 remains in the first position (as the case in Figs. 3A and Fig. 3B )
  • the LEDs remains disconnected during the installation. In this way, the user does not need to worry about the electrical shock when he puts the lamp into the fixture, which corresponds to the transition from Figs. 3A to 3B .
  • Fig. 3C shows a state in which the LEDs are ready to operate.
  • this state is similar to the state in Fig. 2C , i.e. the endcap cover element 203 is in the retracted position, and the switch button 213 is in a second position.
  • the connector pins 205, 207 are connected to the LEDs for conducting the current.
  • Fig. 3D shows a state after a certain time of use and a switch opening mechanism has been triggered to avoid arcing.
  • the switch opening mechanism may use one or more of the same mechanisms as described in US 2016/0290606 A1 .
  • the fixture 302, 303 of the luminaire no longer maintains its shape, e.g. due to a pressure applied on the fixture 302, 303. Accordingly, the endcap cover element 203 moves from the retracted position towards the protracted position over a certain distance.
  • the safety endcap assembly according to the invention is designed such that, when this distance reaches a predetermined threshold, the switch button 213 automatically switches back to the first position, thereby disconnecting the LEDs. In this way, the LEDs can be disconnected before the deformation of the luminaire reaches the point at which arcing starts to occur.
  • Fig. 4 shows another embodiment of the safety endcap assembly 200 according to the invention. This embodiment may comprise one or more features as described above under Figs. 1, 2A - 2C , 3A - 3D , and may further comprise some more details as will be described below.
  • each connector pin 205, 207 is connected to an electrically conductive connection spring 221, 223.
  • Each spring 221, 223 is in turn connected to an electrically conductive contact element 217, 219. This makes it possible for the connector pin 205 to establish an electrical connection with the LEDs via the connection spring 221, 223 and the contact element 217, 219.
  • the connection springs 221, 223 and the contact elements 217, 219 extend through holes 218, 220 in the endcap cover element 203 towards the switch button 213.
  • the switch button 213 also comprises two holes. When the switch button is in the second position, the two holes are aligned with the contacting elements 218, 220. This allows the contacting elements 217, 219 to extends through the holes of the switch button 213 to come into contact with electrodes 229, 231, which are electrically connected to the LEDs.
  • the safety endcap assembly 200 further comprises a spring 45 for pushing the endcap cover element 203 and a spring 215 for rotating the switch button 213.
  • the spring 45 functions to urge the endcap cover element 203 towards the protracted position
  • the spring 215 functions to urge the switch button 213 towards the first position.
  • Spring 215 is activated when the endcap cover element 203 moves from the retracted position towards the protracted position over a predetermined distance.
  • spring 45 gradually moves the endcap cover element 203 towards the protracted position as the fixture 302, 303 deforms, and when this movement reaches the predetermined distance, the spring 215 is activated and moves the switch button 213 to the first position, thereby disconnecting the LEDs from the connector pins 205, 207 to avoid arcing.
  • the spring 45 is a coiled spring
  • the spring 215 is a torsion spring.
  • spring 215 may be implemented as a coil spring configured to generate a torque on the switch button 213.
  • springs 45 and 215 may also be replaced by one or more of other components which perform similar functions.
  • grooves may be arranged on a side surface of the switch button 213 to rotate the switch button as the spring 45 pushes the endcap cover element 203.
  • the electrodes 229, 231 are arranged in the safety endcap assembly. These electrodes may alternatively be arranged outside the safety endcap assembly, e.g. as a part of the LED circuit board in the LED lamp arrangement 1.
  • Figs. 5A - 5G show several states and a corresponding operation of an embodiment of the safety endcap assembly according to the invention.
  • the safety endcap assembly in this embodiment may comprise one or more features as described under Fig. 4 .
  • Fig. 5A shows a state in which the endcap cover element 203 is in the protracted position and the switch button 213 is in the first position (similar to Figs. 2A and 3A ). In this state, the connection springs 221, 223 are not compressed, and the contact elements 217, 219 are not in contact with the front surface of the switch button 213.
  • Fig. 5B shows a state in which endcap cover element 203 is in the retracted position and the switch button 213 in the first position (similar to Figs. 2B and 3B ).
  • the connection springs 221 and 223 are compressed to push the contact elements 217, 219 against the front surface of the switch button 213, because the holes of the switch button 213 are not aligned with the contact elements 217.
  • Fig. 5C shows a state in which the endcap cover element 203 is in the retracted position and the switch button 213 in the second position (similar to Figs. 2C and 3C ). In this position, the holes of the switch button 213 are aligned with the contact elements. The tips of the contact elements 217, 219 are thus pushed through the holes by the connection springs 221, 223, allowing the contact elements 217, 219 to come into contact with the electrodes 229, 231, thereby connecting to the LEDs.
  • the safety endcap assembly 200 further comprises a switch arresting mechanism 239 that locks the switch button 213 in the second position.
  • the switch arresting mechanism 239 is a lock as shown in Figs. 5D and 5E .
  • the lock comprises a protrusion arranged to engage with the switch button 213 when the endcap cover element 203 is in the retracted position.
  • the lock may comprise a recess.
  • the lock has a length substantially equal to the predetermined distance. This allows the switch arresting mechanism 239 to continue to arrest the switch button 213 as the endcap cover element 203 moves, until the movement reaches the predetermined distance.
  • the spring 45 is arranged to assert a spring force between the endcap base element 201 and the endcap cover element 203. As the luminaire fixture changes its shape, the spring 45 pushes the endcap cover element 203 away from the endcap base element 201, as shown in Arrow I.
  • the mechanical lock 239 is arranged in the endcap cover element 203 and the switch 213 is arranged in the endcap base element 203.
  • the switch button 213 As shown in Fig. 5G , as the endcap cover element 203 moves over a predetermined distance D, the switch button 213 is no longer locked by the switch arresting mechanism 239. As a result, the spring 215 rotates the switch button 213 from the second position to the first position (as shown in Arrow J).
  • the spring force provided by spring 215 is arranged to overcome the spring force generated by the springs 221, 223, to allow the switch button 213 to break the contact between the electrodes 229, 231 and the contact elements 217, 219 so as to disconnect these elements.
  • Figs. 6A - 6B show an embodiment of a safety endcap assembly which can tolerate the deformation of the fixture of a luminaire.
  • the figures show a connector pin 207, a spring 223, a switch button 213, an electrode 231 and a switch arresting mechanism 239. These elements may have the same structure and/or function as in Figs. 5A - 5G . This embodiment may also comprise any other elements described above.
  • spring 223 defines a variable length. Due to different degrees of the compression of the connection springs 221, 223, the distance between the connector pins 205, 207 and the contact elements 217, 219 can vary. In this way, as the endcap cover element 203 moves towards the protracted position (e.g. due to the deformation of the luminaire fixture), the contact elements 217, 219 can remain in contact with the electrodes 229, 231 to tolerate the deformation.
  • variable length defined by the connection springs 221, 223 include a first length (A) which corresponds to the natural state of the springs 221, 223 in the absence of an external force, as shown in Fig. 6A , and a second length (B) which corresponds to the compression state of the springs 221, 223 when the endcap cover element 203 is in the retracted position and the switch button 213 is in the second position, as shown in Fig. 6B .
  • connection springs 221, 223 are configured such that the first length A, the second length B and the predetermined distance D (e.g. the length of the protrusion or recess in the switch opening mechanism 239) satisfy to the following inequality: D ⁇ A ⁇ B .
  • the contact element 217, 219 and the electrodes 229, 231 can remain in contact with each other.
  • the switch button 213 can act to disconnect the contact element 217, 219 from the electrodes 229, 231 before arcing occurs.
  • Figs. 7A and 7B show two embodiments of the switch button 213, a contact element 219 and an electrode 231 according to the invention. These elements may be used in the safety endcap assembly as described above.
  • the holes of the switch button 213 is arranged in substantially the same position in the longitudinal axis as the contact between the respective contact elements 217, 219 and electrodes 229, 231, to ensure that the switch button 213 can cut into the contact.
  • the switch button 213 comprises a first surface 213a, a second surface 213b, and a third surface 213 which defines the hole of the switch button 213.
  • the third surface 213 extends from the first surface 213a towards the second surface 213b.
  • the third surface 213c forms an angle ⁇ with respect to the first surface 213a. This angle ⁇ is preferably less than 60 degrees.
  • the third surface 213c and the first surface 213a or second surface 213b define a blade or an edge, as shown in Fig. 7B .
  • the blade or edge makes it easier for the switch button 213 to cut into the position, to ensure that the of the third surface 213c comes into contact with the tip of the contact element 217, 219, to assert a force to push back the contact elements 217, 219 in the direction hey extend.
  • the decrease of the angle ⁇ increases the force component in this direction, so smaller angle ⁇ (e.g. less than 60 degrees) makes it easier for the switch button 213 to force itself between the contact elements 217, 219 and the electrodes 229, 231.
  • the tip of the contact elements 217, 219 are preferably dome shaped.
  • the sloped portion will hit the dome shaped tip of the contact elements 217, 219 and assert a force in the direction of the connection springs 221, 223. The more towards the top of the dome, the easier the switch button 213 can push back the contact elements 217, 219.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Optics & Photonics (AREA)
  • Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)
  • Push-Button Switches (AREA)

Claims (15)

  1. Sicherheitsendkappenbaugruppe (25, 200), um an einem Ende einer LED-Lampe (1), die mehrere LEDs aufweist, angeordnet zu werden, wobei die Sicherheitsendkappenbaugruppe (25, 200) Folgendes umfasst:
    - ein Endkappenbasiselement (201), um an einem Ende eines Gehäuses (3) der LED-Lampe angeordnet zu werden;
    - einen Verbindungsstift (205, 207), der sich entlang einer Achse erstreckt;
    - ein Endkappenabdeckelement (203), das relativ zu dem Endkappenbasiselement (201) entlang der Achse zwischen einer ausgefahrenen Position, in der das Endkappenabdeckelement (203) weiter von dem Endkappenbasiselement (201) entfernt liegt, und einer eingezogenen Position, in der das Endkappenabdeckelement (203) näher an dem Endkappenbasiselement (201) liegt, bewegbar ist;
    - ein Kontaktelement (217, 219) zum elektrischen Verbinden des Verbindungsstifts (205, 207) mit den LEDs;
    - einen Schalterknopf (213), der zwischen einer ersten Position und einer zweiten Position bewegbar ist, wobei der Schalterknopf (213) so angeordnet ist, dass er ein Kontaktelement (217, 219) von den LEDs trennt, wenn sich der Schalterknopf (213) in der ersten Position befindet, und wobei die Sicherheitsendkappenbaugruppe ferner Folgendes umfasst:
    - einen ersten Federmechanismus (45) zum Drücken des Endkappenabdeckelements in Richtung der ausgefahrenen Position; und
    - einen Schalteröffnungsmechanismus, der derart konfiguriert ist, dass, falls sich der Schalterknopf in der zweiten Position befindet und sich das Endkappenabdeckelement über eine vorbestimmte Distanz von der eingezogenen Position in Richtung der ausgefahrenen Position bewegt, der Schalterknopf in die erste Position bewegt wird, um die elektrische Verbindung zwischen dem Kontaktelement (217, 219) und den LEDs zu blockieren,
    dadurch gekennzeichnet, dass
    das Kontaktelement (217, 219) mit dem Verbindungsstift (205, 207) über eine Feder (221, 223) verbunden ist, wobei die Feder (221, 223) eine variable Länge definiert, einschließlich einer ersten Länge, die einem natürlichen Zustand der Feder (221, 223) bei Fehlen einer äußeren Kraft entspricht, und einer zweiten Länge, die einem Kompressionszustand der Feder (221, 223) entspricht, wenn sich das Endkappenabdeckelement (203) in der eingezogenen Position befindet und sich der Schalterknopf (213) in der zweiten Position befindet, wobei die erste Länge, die zweite Länge und die vorbestimmte Distanz so angeordnet sind, dass sie eine folgende Ungleichung erfüllen: D < A − B ,
    Figure imgb0004
     wobei D die vorbestimmte Distanz ist, A die erste Länge ist und B die zweite Länge ist.
  2. Sicherheitsendkappenbaugruppe (25, 200) nach Anspruch 1, wobei der Schalterknopf (213) ein Loch umfasst, wobei, in der ersten Position, das Loch nicht mit dem Kontaktelement in der Achse ausgerichtet ist und, in der zweiten Position, das Loch mit dem Kontaktelement in der Achse ausgerichtet ist,
    wobei, wenn sich das Endkappenabdeckelement (203) in der eingezogenen Position befindet und sich der Schalterknopf (213) in der zweiten Position befindet, sich das Kontaktelement (217, 219) durch das Loch des Schalterknopfes erstreckt.
  3. Sicherheitsendkappenbaugruppe (25, 200) nach Anspruch 1 oder 2, wobei der Schalterknopf eine erste Oberfläche und eine zweite Oberfläche umfasst, wobei die erste Oberfläche und die zweite Oberfläche im Wesentlichen senkrecht zu der Achse sind und wobei eine Distanz zwischen der ersten Oberfläche und der zweiten Oberfläche mindestens 0,4 mm beträgt.
  4. Sicherheitsendkappenbaugruppe nach Anspruch 3, wobei der Schalterknopf (213) ein Loch umfasst, das eine dritte Oberfläche ausbildet, die sich von der ersten Oberfläche zu der zweiten Oberfläche erstreckt, wobei die dritte Oberfläche einen Winkel von weniger als 60 Grad in Bezug auf die erste Oberfläche oder die zweite Oberfläche ausbildet.
  5. Sicherheitsendkappenbaugruppe nach einem der vorhergehenden Ansprüche, wobei der Schalteröffnungsmechanismus Folgendes umfasst:
    - einen zweiten Federmechanismus (215) zum Drücken des Schalterknopfes in Richtung der ersten Position;
    - einen Schalterarretierungsmechanismus (239), der konfiguriert ist, um den Schalterknopf in der geschlossenen Position zu arretieren, wenn sich das Endkappenabdeckelement in der eingezogenen Position befindet, und um den Schalterknopf freizugeben, falls sich das Endkappenabdeckelement über die vorbestimmte Distanz von der eingezogenen Position in Richtung der ausgefahrenen Position bewegt.
  6. Sicherheitsendkappenbaugruppe nach einem der vorhergehenden Ansprüche, wobei der Schalteröffnungsmechanismus einen freitragenden Träger oder eine Torsionsfeder umfasst.
  7. Sicherheitsendkappenbaugruppe nach einem der vorhergehenden Ansprüche, wobei der Schalteröffnungsmechanismus einen länglichen Vorsprung oder eine längliche Aussparung zum Arretieren des Schalterknopfes (213) umfasst, wobei der Vorsprung oder die Aussparung eine Länge aufweist, die im Wesentlichen gleich der vorbestimmten Distanz ist.
  8. Sicherheitsendkappenbaugruppe (25, 200) nach einem der vorhergehenden Ansprüche, wobei die Sicherheitsendkappe derart konfiguriert ist, dass die LEDs nur dann mit dem Verbindungsstift (205, 207) verbunden sind, wenn sich das Endkappenabdeckelement (203) in der eingezogenen Position befindet und sich der Schalterknopf (213) in der zweiten Position befindet.
  9. Sicherheitsendkappenbaugruppe nach einem der vorhergehenden Ansprüche, wobei, in der ausgefahrenen Position, der Schalterknopf durch das Endkappenabdeckelement abgedeckt ist und, in der eingezogenen Position, der Schalterknopf freiliegt.
  10. LED-Lampenbaugruppe, die konfiguriert ist, um in eine Halterung einer Leuchte zu passen, wobei die LED-Lampenbaugruppe Folgendes umfasst:
    - ein Gehäuse;
    - mehrere LEDs, die in dem Gehäuse angeordnet sind;
    - eine Sicherheitsendkappenbaugruppe nach einem der Ansprüche 1-9 an mindestens einem Ende des Gehäuses; und
    - eine Elektrode (229, 231) zum elektrischen Verbinden des Kontaktelements (217, 219) mit den LEDs.
  11. LED-Lampenbaugruppe nach Anspruch 10, wobei der Schalterknopf (213) ein Loch umfasst, wobei, wenn sich das Endkappenabdeckelement (203) in der eingezogenen Position befindet und sich der Schalterknopf (213) in der zweiten Position befindet, sich das Kontaktelement (217, 219) durch das Loch des Schalterknopfes erstreckt, um mit der Elektrode (229, 231) in Kontakt zu kommen.
  12. LED-Lampenbaugruppe nach Anspruch 10 oder 11, wobei der Schalterknopf eine erste Oberfläche und eine zweite Oberfläche umfasst (213), wobei die erste Oberfläche und die zweite Oberfläche im Wesentlichen senkrecht zu der Achse sind und wobei der Kontakt zwischen dem Kontaktelement (217, 219) und der Elektrode (229, 231) in einem Raum zwischen der ersten Oberfläche und der zweiten Oberfläche angeordnet ist.
  13. LED-Lampenbaugruppe nach Anspruch 12, wobei der Schalterknopf (213) ein Loch umfasst, das eine dritte Oberfläche ausbildet, die sich von der ersten Oberfläche zu der zweiten Oberfläche erstreckt, wobei die dritte Oberfläche eine Kante ausbildet, die so angeordnet ist, dass sie den Kontakt zwischen dem Kontaktelement (217, 219) und der Elektrode (229, 231) unterbricht.
  14. LED-Lampenbaugruppe nach einem der Ansprüche 10-13, wobei, mit dem Endkappenabdeckelement in seiner ausgefahrenen Position, die LED-Röhrenbaugruppe nicht in die Lampenhalterung passt; und, mit dem Endkappenabdeckelement in seiner eingezogenen Position, die LED-Röhrenbaugruppe in die Lampenhalterung passt.
  15. Verfahren zum Betreiben einer LED-Lampenbaugruppe in einer Leuchte, wobei die LED-Lampenbaugruppe eine Sicherheitsendkappenbaugruppe (25, 200) nach einem der Ansprüche 1-9 umfasst, wobei das Verfahren Folgendes umfasst:
    - Bewegen des Endkappenabdeckelements (203) in Richtung der ausgefahrenen Position gemäß einer Formänderung einer Halterung der Leuchte; und
    - Bewegen des Schalterknopfes (213) von der zweiten Position in die erste Position, wobei, falls sich der Schalterknopf in der zweiten Position befindet und sich das Endkappenabdeckelement über eine vorbestimmte Distanz von der eingezogenen Position in Richtung der ausgefahrenen Position bewegt, der Schalterknopf in die erste Position geschaltet wird, um die elektrische Verbindung zwischen dem Kontaktelement (217, 219) und den LEDs zu blockieren.
EP17206276.2A 2017-12-08 2017-12-08 Sicherheits-endkappenanordnung für led leuchtröhre Active EP3495727B1 (de)

Priority Applications (3)

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EP17206276.2A EP3495727B1 (de) 2017-12-08 2017-12-08 Sicherheits-endkappenanordnung für led leuchtröhre
CN201880079180.3A CN111448421B (zh) 2017-12-08 2018-12-07 用于led灯管的安全端盖组件
PCT/EP2018/084050 WO2019110829A1 (en) 2017-12-08 2018-12-07 Safety endcap assembly for a led tube

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WO2020155036A1 (zh) * 2019-01-31 2020-08-06 厦门普为光电科技有限公司 无孔式旋转灯头

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US8523394B2 (en) * 2010-10-29 2013-09-03 Ilumisys, Inc. Mechanisms for reducing risk of shock during installation of light tube
RU2608560C2 (ru) * 2011-03-30 2017-01-23 Филипс Лайтинг Холдинг Б.В. Торцевая крышка для трубчатого источника света
US8858019B2 (en) * 2012-12-20 2014-10-14 General Electric Company Light emitting diode (LED) lamp replacement safety switch for linear fluorescent lamps
NL2011780C2 (en) 2013-11-11 2015-05-13 Silicon Hill B V Safety and cap assembly for a led tube, and led tube assembly comprising a safety end cap assembly.
CN204114661U (zh) * 2014-10-08 2015-01-21 深圳市豪恩光电照明有限公司 安全灯具及安全灯头
CN105987360B (zh) * 2015-01-27 2020-11-03 朗德万斯公司 电连接头和包括该电连接头的照明装置
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CN111448421A (zh) 2020-07-24
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CN111448421B (zh) 2022-10-28

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