EP0438630B1 - Explosion-protected lamp holder - Google Patents

Explosion-protected lamp holder Download PDF

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Publication number
EP0438630B1
EP0438630B1 EP90115613A EP90115613A EP0438630B1 EP 0438630 B1 EP0438630 B1 EP 0438630B1 EP 90115613 A EP90115613 A EP 90115613A EP 90115613 A EP90115613 A EP 90115613A EP 0438630 B1 EP0438630 B1 EP 0438630B1
Authority
EP
European Patent Office
Prior art keywords
lamp
accordance
socket mount
lamp fitting
pins
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP90115613A
Other languages
German (de)
French (fr)
Other versions
EP0438630A1 (en
Inventor
Manfred Leischner
Eberhard Langer
Dr. Peter Völker
Dieter Pilz
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.)
R Stahl Schaltgeraete GmbH
Original Assignee
R Stahl Schaltgeraete GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from DE19893943065 external-priority patent/DE3943065C1/en
Application filed by R Stahl Schaltgeraete GmbH filed Critical R Stahl Schaltgeraete GmbH
Publication of EP0438630A1 publication Critical patent/EP0438630A1/en
Application granted granted Critical
Publication of EP0438630B1 publication Critical patent/EP0438630B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01RELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R33/00Coupling 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
    • H01R33/965Dustproof, splashproof, drip-proof, waterproof, or flameproof holders
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21VFUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V25/00Safety devices structurally associated with lighting devices
    • F21V25/12Flameproof or explosion-proof arrangements
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01RELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R33/00Coupling 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
    • H01R33/05Two-pole devices
    • H01R33/06Two-pole devices with two current-carrying pins, blades or analogous contacts, having their axes parallel to each other
    • H01R33/08Two-pole devices with two current-carrying pins, blades or analogous contacts, having their axes parallel to each other for supporting tubular fluorescent lamp

Definitions

  • the invention is based on an explosion-proof lamp holder for two-pin base lamps, with the features of the preamble of claim 1.
  • an explosion-proof lamp in which the commercially available, non-protected two-pin fluorescent lamps can be used.
  • the known lamp contains two sockets which are axially displaceably mounted in the housing of the lamp.
  • the two sockets are biased towards each other by assigned springs that are supported in the luminaire housing.
  • you insert the fluorescent lamp they will counteract the Spring force pressed apart by hand. After releasing, the springs inevitably push the sockets onto the lamp pins.
  • the electrical connection to the lamp pins is made via spring clips, which are available in every lamp holder and can be opened via a complex Bowden cable mechanism arranged in the lamp housing.
  • the open position of the spring clips is locked by means of a special mechanism as soon as the sockets in the luminaire housing are pressed back against their spring force into their external positions for inserting and removing the fluorescent lamp. In this way it is ensured that the lamp pins and the spring clips neither prevent the socket from being pushed onto the lamp pins, nor that there is blunt butt contact between the ends of the lamp pins and the spring clips. The latter is prohibited for reasons of explosion protection.
  • DE-C-3910872 describes an explosion-proof version which is also pushed onto the pins of the fluorescent lamp by means of a pretensioning spring.
  • This version contains two sockets with lamella contacts, in front of which a disc with calibrated bores is rotatably mounted. The disk can be rotated back and forth between two end positions, the bushings of the socket being closed in one end position, while in the other end position the two bores in the disk are aligned with the bushings.
  • the holder is guided in the luminaire housing and can be moved longitudinally retracted by hand against the action of the spring and then inserted the fluorescent lamp with its pins into the holes in the disc.
  • the fluorescent lamp is rotated about its longitudinal axis, the ends of the lamp pins sliding along the front of the lamp holder.
  • the springs slide the sockets onto the lamp pins.
  • the new lamp holder has the advantage that no complicated and expensive sliding guides for the lamp holder are necessary in the lamp housing, which tend to jam when dirty or with unfavorable tolerances.
  • plug sockets preferably with lamella contacts, are advantageously arranged in both bores.
  • the sockets are directly axially immovable in the socket carrier and are always moved with it.
  • the sockets are guided in a longitudinally displaceable manner in the socket carrier.
  • the socket carrier only rotates about its own axis and does not perform any longitudinal movement.
  • a simple solution for the screw drive is obtained if an external thread is provided on the socket carrier, which, depending on the embodiment, interacts either with an internal thread in the housing or an internal thread of a nut which is longitudinally displaceable on the socket carrier and on which the socket holder sits.
  • the screw drive is preferably designed with multiple gears.
  • a locking mechanism is preferably provided according to another invention, which has only two stable end positions. In all positions between the end positions, the locking mechanism endeavors to turn the socket carrier into the nearest end position, ie either into the end position in which the Sockets are pushed completely onto the lamp pins or the end position in which they are retracted from the lamp pins as far as possible. It is thereby achieved that after the dead center has been exceeded, in the sense of inserting the fluorescent lamp, the necessary safe contact between the socket and the lamp is inevitably established, while in the other case the fluorescent lamp is turned back into the removal position.
  • the screw drive converts, as mentioned above, even small torques that can be exerted by the locking mechanism into relatively strong axial forces for moving the sockets on the lamp pins.
  • the locking mechanism preferably contains a cam track and at least one cam follower that runs on the cam track in a spring-loaded manner. If tilting moments are to be largely excluded, it is expedient to use two cam followers diametrically opposite one another with respect to the axis of the socket carrier, so that the socket carrier remains free of transverse forces.
  • the driver member In order to close the sockets when the fluorescent lamp is removed, the driver member is rotatably mounted on the socket carrier according to the invention and closes the sockets in one of its two end positions, while in the other end position the light pins resting on the driver member are aligned with the sockets.
  • a suitable simple driving element consists of a disk which is rotatably mounted in front of the front of the socket carrier and which contains a slot which runs along a diameter and is open towards an edge side of the disk in order to enable the lamp pins to be inserted radially. Means a spring, the disc is biased to the position in which the slot is rotated relative to the sockets.
  • This disc is particularly easy if it carries a cylindrical pin on its back, which is rotatably mounted in a bore of the socket carrier, which lies between the holes for the sockets.
  • the new lamp holder is designed in such a way that the insertion and removal of the standard fluorescent lamps with a two-pin base is practically the same as that of lamp holders from the non-Ex area.
  • the electrical contact with the lamp pins is not caused by a grinding movement in place. fixed contacts in the lamp holder, but the rotary movement of the fluorescent lamp is used to inevitably push the sockets contained in the socket holder onto the lamp pins.
  • the angle of rotation of the fluorescent lamp is necessarily limited to a rotational stroke between two end positions, which makes the handling of the lamp holder after the main registration of the lamp holders distinguishes from the non-Ex area.
  • the fluorescent lamp can only be rotated in one direction after removal from the lamp holder after the main login. Which direction is the right one depends on which side of the fluorescent lamp the fitter happens to be on.
  • the display device connected to the socket carrier provides the user or the fitter with an unambiguous indication of the end position of the socket carrier and the direction in which it is to be rotated in order to either insert the fluorescent lamp into the socket or to get it out.
  • the display device contains a display element that can be adjusted together with the socket carrier. Depending on the end position, a display symbol symbolizing the possible direction of rotation can be seen in at least one display window. Depending on the angle of rotation or the design of the display element, two display windows can also be provided, which are arranged in such a way that the display symbol symbolizing the direction of rotation can be recognized only in one of the display windows.
  • the display element with the display symbols is formed by the locking disc of the locking mechanism, which in any case participates in the rotary movement of the socket carrier.
  • the display symbols are arranged on the outer peripheral surface of the locking disk.
  • the lamp holder 1 shows a lamp holder 1 which meets the requirements of explosion protection for commercially available fluorescent lamps with a two-pin base.
  • the lamp holder 1 contains an approximately cuboid housing 2 in which there is a through hole 3.
  • the bore 3 passes through the housing 2 from its approximately planar front 4 to its rear 5, which runs approximately parallel to the front 4.
  • a side 6 extending between the two sides 4 and 5 carries fastening devices 7 for attaching the lamp holder 1 in a lamp housing (not shown further).
  • the through hole 3 contains a two-start internal thread 8 with a rectangular cross-section and serves as a seat for an approximately cylindrical socket carrier 9, which carries a complementary external thread 11 on its outer peripheral surface.
  • the two threads 8 and 11 together form a screw drive 12, with the aid of which the socket carrier 9 is axially movable in the housing 2 when it rotates about its longitudinal axis 13.
  • the through-bore 3 has a section 14 adjoining the rear side 5, which has a larger diameter than the thread 8 and is internally cylindrical smooth.
  • a locking mechanism 15 which is formed by an approximately star-shaped locking disc 16 and two plungers 17 which cooperate with the locking disc 16.
  • the locking disk 16 contains a total of four radially outwardly projecting teeth or arms 18, between which a trough 19 is provided.
  • the troughs 19 and the prongs 18 are distributed equidistantly along the circumference of the locking disk 16 and, each for themselves, have the same distance from the axis of rotation 13.
  • the locking disk 16 is in one piece molded on the back of the socket carrier 9.
  • the plungers 17 are arranged radially with respect to the locking disk 16, and their cross section is adapted to the shape of the pockets 21. They have on their front side facing the locking disk 16 a partially cylindrical elevation 22 which runs along the outer peripheral surface of the locking disk 16; the two plungers 17 are interchangeable.
  • two blind holes 23 are contained, in which helical compression springs 24 are arranged.
  • the compression springs 24 are supported at the other end on a base surface 25 of the pocket 21 remote from the locking disk 16 and press the plungers 17 forward until they come into contact with the locking disk 16.
  • the depth of the bore section 14, measured parallel to the axis of rotation 13 is deeper by the thickness of the locking disk 16 than it corresponds to the stroke of the socket carrier 9.
  • a correspondingly deep expansion, i.e. Expansion in the direction parallel to the axis of rotation 13, also have the two plungers 17th
  • a cover 26 is fastened on the rear side 5 by means of screws (not illustrated), the fastening screws of which are screwed into the internal thread 27 of the housing 2.
  • the cover 26 has an extension of the socket carrier 9 an archway-shaped opening 28 shown in FIG. 1.
  • the inner structure of the socket carrier 9 results from FIG. 2, from which it can also be seen how the flat locking disk 16 is integrally formed on the rear side thereof.
  • the socket carrier 9 is provided with two mutually parallel through bores 29 which run from its end face 31 to through the locking disk 16 and to the rear side 32 thereof which is parallel to the end face 31. Both bores 29 are parallel to the axis of rotation 13 and are arranged such that their axes lie in a common plane with the axis of rotation 13 and have the same radial distance from it. The center distance of the two bores 29 corresponds to the center distance of lamp pins 33, which protrude axially from an end face of a fluorescent lamp 34.
  • the bores 29 are cylindrical in their section 35 starting at the end face 31 and merge in the area of the locking disk 16 into a square-section section 36, which in turn is adjoined by a cylindrical area 37 of larger diameter, which directly adjoins the rear side 32.
  • Each of the sockets 38 consists of a cylindrical section 41, which on its front side, which is adjacent to the end face 31, contains a coaxial blind bore 42 in which a multi-lamellar contact sleeve 43 is arranged.
  • each socket 38 is provided with a square shoulder 44, which has a square cross section and is in the assembled state in the square recess 36 in order to secure the socket 38 against rotation about its longitudinal axis.
  • a groove 45 is inserted into the square set 44, which holds a snap ring 46 which projects beyond the square 44.
  • This snap ring 46 lies in the assembled state in the cylindrical region 37 and effects the axial securing of the socket 38.
  • a cover 47 screwed onto the rear side 32 of the locking disk 16 fixes the two sockets 38 and contains corresponding square openings 48 for the passage of the square attachments 44.
  • a cylindrical pin 53 of a drive plate 54 is rotatably mounted in the middle between the two bores 29 in which a cylindrical pin 53 of a drive plate 54 is rotatably mounted.
  • the drive plate 54 is shown in FIG. 3 from the rear and lies flat on the end face 32.
  • the outer diameter of the driving disk is slightly smaller than the core diameter of the external thread 11 and it has a slot 55 which runs parallel to a diameter and extends beyond the axis of rotation 13 and cuts through the edge of the disk 54 on one side.
  • the cylindrical pin 53 is integrally formed, which consists of a section 56 with a large diameter and a longer pin section 57 with a smaller diameter.
  • the section 57 extends completely through the bore 52 into the space behind the cover 47, where it is provided with an annular groove 58 and a snap ring 59 seated therein.
  • a clock spring 61 On the pin section 57, between the section 56 with the larger diameter and a shoulder projecting into the bore 52, sits a clock spring 61 which is inserted at one end in the socket carrier 9 and at the other end in the pin section 56.
  • the driving plate 54 is rotationally limited on the end face 31, for which purpose two flat pins 62 protrude on the end face 31, which engage in kidney-shaped recesses 63 which are provided on the back of the driving plate 54.
  • two stops 64 are finally arranged on the front side 4 next to the bore 3, which cooperate with the end face of the fluorescent lamp 34.
  • the lamp holder 1 described so far is used together with another lamp holder of basically the same construction in a lamp housing.
  • the only difference that exists between the two lamp sockets within a lamp housing is that one of the sockets has a screw drive 12 with a right-hand thread and the other has a screw drive with a left-hand thread, as is readily understandable from the following description of the function, and the rest are mirror-symmetrical.
  • the slot 55 is aligned with a groove 66 of the housing 2, which extends radially with respect to the bore 3 and, as can be seen in FIG. 1, passes through the wall opposite the wall 6.
  • the axial depth of the groove 66 is dimensioned such that its groove base is approximately aligned with the end face 31 or springs back slightly relative to the latter.
  • the insertion of the fluorescent lamp 34 into the explosion-proof lamp holder 1 takes place in a manner similar to the insertion of such lamps in non-explosion-proof sockets by the two lamp pins 33 are inserted at one end of the lamp 34 through the groove 66. They then slide further through the slot 55 aligned with the groove 66 until finally a further insertion movement is limited by the fact that the lamp pin 33 which has penetrated first has arrived at the end of the slot 55.
  • the fluorescent lamp 34 is now rotated about its longitudinal axis.
  • the driving disk 54 is rotated on the socket carrier 9 until the peg-shaped extensions 62 in the kidney-shaped recesses 63 have reached the other system against the force of the clock spring 61. In this position, the slot 55 runs over the center of the two bores 29.
  • the lamp pins 33 could be inserted into the sockets 38 by axial movement of the fluorescent lamp 34. However, because of the stops 64, this axial movement is not possible and the lamp pins 33 initially remain without contact with the sockets 38, on the bores 42 of which they are aligned.
  • the socket pins 9 are now rotated by the lamp pins 33 via the driving disk 54.
  • the screw drive 12 converts the rotary movement into an axial feed movement of the socket carrier 9, the sockets 38 of which are pushed axially in the direction of the lamp pins 33 in accordance with the rotary movement.
  • the plungers 17 are pressed back against the action of the compression springs 24 by the locking disk 16 into the pockets 21.
  • the locking mechanism 15 has the tendency to turn the locking disc 16 back into the starting position until the dead center of the locking mechanism 15 is exceeded, which is characterized in that the cylindrical elevations 22 come to rest on the tips of the teeth 18. After the dead center has been exceeded, the locking mechanism 15 tends to continue to rotate the locking disc 16 into the other stable position in the direction of movement until the partially cylindrical elevations 22 lie in the adjacent depressions 19.
  • the angle of rotation between the two stable positions of the locking mechanism 15 is 90 °. During this 90 ° rotation, the socket carrier 9 is advanced so far that the lamella contacts 43 contained in the sockets 38 are pushed fully or completely onto the associated lamp pins 33.
  • the lamp pins 33 are held in alignment with the sockets 38 by the drive plate 54 or the slot 55 contained therein.
  • both the locking mechanism 15 and the coil spring 61 act in the sense that when the fluorescent lamp 34 is released, it is rotated back into a position in which its lamp pins 33 can slide out again through the groove 66. Only after the dead center has been exceeded does the catch mechanism 15 act in the sense of the automatic completion of the rotary movement of the fluorescent lamp 34 when it is inserted. If the fluorescent lamp 34 is released after the dead center, the catch mechanism 15 snaps into the other end position, which is synonymous with the maximum axial advance of the socket carrier 9 in the direction of the stop 64 or the end face of the fluorescent lamp 34.
  • the lamp In order to achieve this end position, the lamp must be rotated by an angle of rotation which is equal to the sum of the angles of rotation in the locking mechanism 15 plus the angle of rotation of the drive plate 54 between the two angular ranges delimited by the kidney-shaped recesses 63. In the exemplary embodiment explained, this is approximately 135 °.
  • FIG. 5 shows the socket holder fully retracted when the lamp pins 33 located in the slot 55 can run freely over the end face 31, while FIG. 6 illustrates the state in which the sockets 38 are completely pushed onto the lamp pins 33.
  • the lamp holder 1 is therefore provided with a display device 71 which comprises the locking disk 16 and two display windows 72 and 73 located in the housing 2.
  • the housing 2 is provided on its side opposite the side 6 with a partially cylindrical elevation 74 which is concentric with the through bore 3 for the socket carrier 9.
  • the partially cylindrical elevation 74 which bulges convexly from the housing 2, extends from the front side 4 to the cover 26.
  • the two display windows 72 and 73 are located in the partially cylindrical elevation 74 recessed, which have an extent, measured parallel to the longitudinal axis of the bore 3, which is equal to the possible stroke of the socket carrier 9 plus the strength of the Locking disc 16 is.
  • the rectangular display windows 72 and 73 are symmetrical with respect to a vertical axis which passes through the longitudinal axis of the bore 3 and is perpendicular to the side 6 of the housing 2; both display windows 72 and 73 are separated from one another by a web 75.
  • the locking disk 16 forms the display element which interacts with the display windows 72 and 73.
  • the prongs 18 ' is provided on its outer peripheral surface with two display symbols 76 and 77 in the form of arrows.
  • the two arrows 76 and 77 point in different directions, but both are parallel to the circumferential direction with respect to the rotational movement of the socket carrier 9.
  • the mode of operation and the interaction of the display device 71 are as follows:
  • the catch mechanism 15 is in the position shown in FIG. 5.
  • the locking disc 16 is the lid 26 immediately adjacent and the prongs 18 'is below the display window 72, so that the arrow 77 can be seen through the display window 82 therethrough.
  • This arrow points to the right in FIG. 1 and indicates that, starting from this end position, the socket carrier 9 can be rotated through 90 ° to the right. If the user wants to use the fluorescent lamp 34, he only has to follow the direction of rotation indicated by the arrow 77. By rotating in this direction, the socket carrier 9 is screwed into the thread 8 to the front 4, the prongs 18 'moving from the display window 72 to the display window 73.
  • the locking disk 16 performs a translatory movement from the cover 26 in the direction of the front side 4.
  • the prongs 18 'are behind the display window 83 which is now the view of the arrow 76 releases that points in the opposite direction in the sense of a left turn.
  • Under the display window 82 is now another prong 18 of the locking disc 16, which has no display symbols, so that the display is clear.
  • the user receives a clear indication of the direction in which the fluorescent lamp 34 is to be rotated in order to remove it from the lamp holder 1 to be able to.
  • the socket carrier 9 itself is axially immovable.
  • the axial movement is instead provided by the sockets 38, which are longitudinally displaceable in the socket carrier 9.
  • the bore 3 is a stepped bore and widens in the direction of the rear side 5 at 82.
  • the stepped bore 3 has the socket carrier 9 which is smooth-walled on the outside in this area and runs with a radially projecting collar 83 in the extension 82.
  • a holding plate 74 screwed onto the rear side 5 secures the socket carrier 9 against axial displacement in the housing 2.
  • the socket carrier 9 is extended beyond the holding plate 54 and carries the external thread there 11, on which a nut 85, which contains the internal thread 8, is screwed on.
  • the nut 85 forms, together with the external thread 11, the aforementioned screw drive 12. It is provided with a tubular extension 86 pointing away from the housing 2, on the free end of which a washer 87 is screwed on by screws (not shown).
  • the two sockets 38 are axially displaceable in the socket carrier 9 and protrude beyond the rear end thereof. They end in a thrust piece 88 which is rotatably and axially secured in a bore 89 of the disk 87 which is concentric with the socket carrier 9.
  • the socket carrier 9 When the fluorescent lamp 34 is rotated about its longitudinal axis, the socket carrier 9 is also rotated, which converts the screw drive 12 into an axial movement of the nut 75, which is guided so as to be non-rotatable but axially displaceable. This axial movement is transmitted to the two sockets 38 which, as before, contain the lamella contacts 43 in their front end.

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

Abstract

An explosion protected socket unit for use with electrical light bulbs has a main housing (3) with a bore to receive a bush element (11) that contains the receiving elements for the two pins of a light bulb. The bore is formed with a thread section (8) that matches a mating section on the bush. The bush also has a profiled surface (19) that engages with spring-loaded pins (17) in the housing to fix the positions. When the bulb is inserted and rotated axial movement occurs until the pins engage the enclosed contacts.

Description

Die Erfindung geht aus von einer explosionsgeschützten Lampenfassung für Zweistiftsockellampen, mit den Merkmalen des Oberbegriffs des Anspruches 1.The invention is based on an explosion-proof lamp holder for two-pin base lamps, with the features of the preamble of claim 1.

Aus der EP-A-0250712 ist eine explosionsgeschützte Leuchte bekannt, in der die handelsüblichen, nichtgeschützten Zweistiftsockel-Leuchtstofflampen verwendet werden können. Die bekannte Leuchte enthält zwei Fassungen, die in dem Gehäuse der Leuchte axial verschieblich gehaltert sind. Durch zugeordnete Federn, die sich im Leuchtengehäuse abstützen, sind die beiden Fassungen in Richtung aufeinander zu vorgespannt. Beim Einsetzen der Leuchtstofflampe werden sie entgegen der Federkraft von Hand auseinandergedrückt. Nach dem Loslassen schieben die Federn die Fassungen zwangsläufig auf die Lampenstifte.From EP-A-0250712 an explosion-proof lamp is known in which the commercially available, non-protected two-pin fluorescent lamps can be used. The known lamp contains two sockets which are axially displaceably mounted in the housing of the lamp. The two sockets are biased towards each other by assigned springs that are supported in the luminaire housing. When you insert the fluorescent lamp, they will counteract the Spring force pressed apart by hand. After releasing, the springs inevitably push the sockets onto the lamp pins.

Die elektrische Verbindung zu den Lampenstiften wird über Federklemmen hergestellt, die in jeder Lampenfassung vorhanden sind und die über einen in dem Leuchtengehäuse angeordneten aufwendigen Bowdenzugmechanismus geöffnet werden können. Mittels einer besonderen Mechanik wird die geöffnete Stellung der Federklemmen verriegelt, sobald die Fassungen in dem Leuchtengehäuse entgegen der Federkraft in ihre außen liegenden Stellungen zum Einsetzen und Entnehmen der Leuchtstofflampe zurückgedrückt sind. Auf diese Weise wird sichergestellt, daß die Lampenstifte und die Federklemmen weder ein Aufschieben der Fassung auf die Lampenstifte behindern, noch daß eine stumpfe Stoßberührung zwischen den Stirnenden der Lampenstifte und den Federklemmen zustandekommt. Letzteres ist aus Gründen des Explosionsschutzes verboten.The electrical connection to the lamp pins is made via spring clips, which are available in every lamp holder and can be opened via a complex Bowden cable mechanism arranged in the lamp housing. The open position of the spring clips is locked by means of a special mechanism as soon as the sockets in the luminaire housing are pressed back against their spring force into their external positions for inserting and removing the fluorescent lamp. In this way it is ensured that the lamp pins and the spring clips neither prevent the socket from being pushed onto the lamp pins, nor that there is blunt butt contact between the ends of the lamp pins and the spring clips. The latter is prohibited for reasons of explosion protection.

In der DE-C-3910872 ist eine explosionsgeschützte Fassung beschrieben, die ebenfalls mittels einer Vorspannfeder auf die Stifte der Leuchtstofflampe aufgeschoben wird. Diese Fassung enthält zwei mit Lamellenkontakten versehene Buchsen, vor denen eine Scheibe mit kalibrierten Bohrungen drehbar gelagert ist. Die Scheibe kann zwischen zwei Endstellungen hin- und hergedreht werden, wobei in der einen Endstellung die Buchsen der Fassung verschlossen sind, während in der anderen Endstellung die beiden Bohrungen in der Scheibe mit den Buchsen fluchten.DE-C-3910872 describes an explosion-proof version which is also pushed onto the pins of the fluorescent lamp by means of a pretensioning spring. This version contains two sockets with lamella contacts, in front of which a disc with calibrated bores is rotatably mounted. The disk can be rotated back and forth between two end positions, the bushings of the socket being closed in one end position, while in the other end position the two bores in the disk are aligned with the bushings.

Zum Einsetzen der Leuchtstofflampe wird die in dem Leuchtengehäuse längsverschieblich geführte Fassung entgegen der Wirkung der Feder von Hand zurückgezogen und sodann die Leuchtstofflampe mit ihren Stiften in die Bohrungen der Scheibe eingeführt. Wenn letzteres am beiden Seiten der Leuchtstofflampe geschehen ist, wird die Leuchtstofflampe um ihre Längsachse gedreht, wobei die Stirnenden der Leuchtenstifte auf der Vorderseite der Lampenfassung entlanggleiten. Sobald die Lampenstifte mit den Steckbuchsen fluchten, schieben die Federn die Fassungen auf die Lampenstifte auf.To insert the fluorescent lamp, the holder is guided in the luminaire housing and can be moved longitudinally retracted by hand against the action of the spring and then inserted the fluorescent lamp with its pins into the holes in the disc. When the latter has happened on both sides of the fluorescent lamp, the fluorescent lamp is rotated about its longitudinal axis, the ends of the lamp pins sliding along the front of the lamp holder. As soon as the lamp pins are aligned with the sockets, the springs slide the sockets onto the lamp pins.

Ausgehend hiervon ist es Aufgabe der Erfindung, eine Lampenfassung für explosionsgeschützte Leuchten zu schaffen, die keine Feder benötigt, um die Steckbuchsen auf die Lampenstifte aufzuschieben.Proceeding from this, it is an object of the invention to provide a lamp holder for explosion-proof lights which does not require a spring in order to push the sockets onto the lamp pins.

Diese Aufgabe wird erfindungsgemäß durch die Lampenfassung mit den Merkmalen des Anspruches 1 gelöst.This object is achieved by the lamp holder with the features of claim 1.

Infolge des verwendeten Schraubtriebs ergibt sich beim Drehen der Leuchtstofflampe eine zwangsläufige Axialbewegung der Steckbuchsen, wobei deren Vorschubkraft entsprechend der Gewindesteigung verstärkt wird. Auch große Kräfte zum Aufschieben und Abziehen der Buchsen lassen sich ohne weiteres mit der neuen Lampenfassung aufbringen.As a result of the screw drive used, there is an inevitable axial movement of the sockets when the fluorescent lamp is rotated, the feed force being increased in accordance with the thread pitch. Even large forces for pushing on and pulling off the sockets can be easily applied with the new lamp holder.

Außerdem hat die neue Lampenfassung den Vorteil, daß in dem Leuchtengehäuse keine komplizierten und aufwendigen Schiebeführungen für die Lampenfassung notwendig sind, die bei Verschmutzen oder bei ungünstigen Toleranzen zum Verklemmen neigen.In addition, the new lamp holder has the advantage that no complicated and expensive sliding guides for the lamp holder are necessary in the lamp housing, which tend to jam when dirty or with unfavorable tolerances.

Um eine gleichmäßigere Strombelastung der Lampenwendel in derLampe bzw. eine Verdoppelung der Kontaktstellen an den Stiften zu erreichen, sind vorteilhafterweise in beiden Bohrungen Steckbuchsen, vorzugsweise mit Lamellenkontakten, angeordnet.In order to achieve a more uniform current load on the lamp filament in the lamp or a doubling of the contact points on the pins, plug sockets, preferably with lamella contacts, are advantageously arranged in both bores.

Um die notwendige Axialbewegung der Steckbuchsen zu erzeugen, kommen grundsätzliche zwei unterschiedliche Lösungen in Frage. Bei der einen Lösung sitzen die Steckbuchsen unmittelbar axial unverschieblich im Buchsenträger und werden immer zwangsläufig mit diesem bewegt. Bei der anderen Ausführungsform sind die Steckbuchsen in dem Buchsenträger längsverschieblich geführt. Bei dieser Ausführungsform dreht sich der Buchsenträger nur um seine eigene Achse und vollführt keine Längsbewegung.In order to generate the necessary axial movement of the sockets, two different solutions are possible. In one solution, the sockets are directly axially immovable in the socket carrier and are always moved with it. In the other embodiment, the sockets are guided in a longitudinally displaceable manner in the socket carrier. In this embodiment, the socket carrier only rotates about its own axis and does not perform any longitudinal movement.

Eine einfache Lösung für den Schraubtrieb wird erhalten, wenn auf dem Buchsenträger ein Außengewinde vorgesehen ist, das, je nach Ausführungsform, entweder mit einem Innengewinde in dem Gehäuse oder einem Innengewinde einer auf dem Buchsenträger längsverschieblichen Mutter zusammenwirkt, an der die Buchsenhalter sitzen.A simple solution for the screw drive is obtained if an external thread is provided on the socket carrier, which, depending on the embodiment, interacts either with an internal thread in the housing or an internal thread of a nut which is longitudinally displaceable on the socket carrier and on which the socket holder sits.

Damit eine Drehbewegung des Buchsenträgers um etwa 90° ausreicht, um den notwendigen Axialhub zu erzeugen, ist bevorzugt der Schraubtrieb mehrgängig ausgeführt.In order that a rotary movement of the bush carrier by approximately 90 ° is sufficient to generate the necessary axial stroke, the screw drive is preferably designed with multiple gears.

Damit auch bei wenig achtsamer Handhabung der Leuchtstofflampe beim Einsetzen die Steckbuchsen vollständig auf die Lampenstifte aufgeschoben werden, ist gemäß weiterer Erfindung vorzugsweise ein Rastwerk vorgesehen, das nur zwei stabile Endlagen aufweist. In allen Stellungen zwischen den Endlagen ist das Rastwerk bestrebt, den Buchsenträger in die jeweils nächstliegende Endlage zu drehen, d.h. entweder in jene Endlage, in denen die Steckbuchsen vollständig auf die Lampenstifte aufgeschoben sind oder jene Endlage, in der sie von den Lampenstiften maximal zurückgezogen sind. Dadurch wird erreicht, daß nach Überschreiten des Totpunktes im Sinne eines Einsetzens der Leuchtstofflampe der notwendige sichere Kontakt zwischen der Fassung und der Leuchte zwangsläufig hergestellt wird, während im anderen Falle die Leuchtstofflampe in die Entnahmestellung zurückgedreht wird. Der Schraubtrieb setzt dabei, wie vorerwähnt, auch kleine Drehmomente, die von dem Rastwerk ausgeübt werden können, in verhältnismäßig starke Axialkräfte zum Bewegen der Steckbuchsen auf den Lampenstiften um.So that even with little careful handling of the fluorescent lamp when inserting the sockets are pushed completely onto the lamp pins, a locking mechanism is preferably provided according to another invention, which has only two stable end positions. In all positions between the end positions, the locking mechanism endeavors to turn the socket carrier into the nearest end position, ie either into the end position in which the Sockets are pushed completely onto the lamp pins or the end position in which they are retracted from the lamp pins as far as possible. It is thereby achieved that after the dead center has been exceeded, in the sense of inserting the fluorescent lamp, the necessary safe contact between the socket and the lamp is inevitably established, while in the other case the fluorescent lamp is turned back into the removal position. The screw drive converts, as mentioned above, even small torques that can be exerted by the locking mechanism into relatively strong axial forces for moving the sockets on the lamp pins.

Das Rastwerk enthält vorzugsweise eine Nockenbahn und wenigstens einen Nockenfolger, der federvorgespannt auf der Nockenbahn läuft. Wenn Kippmomente weitgehend ausgeschlossen werden sollen, ist es zweckmäßig, zwei bezüglich der Achse des Buchsenträgers diametral gegenüberliegende Nockenfolger zu verwenden, damit der Buchsenträger querkraftfrei bleibt.The locking mechanism preferably contains a cam track and at least one cam follower that runs on the cam track in a spring-loaded manner. If tilting moments are to be largely excluded, it is expedient to use two cam followers diametrically opposite one another with respect to the axis of the socket carrier, so that the socket carrier remains free of transverse forces.

Um bei entnommener Leuchtstofflampe die Steckbuchsen zu verschließen, ist erfindungsgemäß das Mitnehmerglied auf dem Buchsenträger drehbar gelagert und verschließt in einer seiner beiden Endstellungen die Steckbuchsen, während in der anderen Endstellung die an dem Mitnehmerglied anliegenden Leuchtenstifte mit den Steckbuchsen fluchten. Ein hierfür geeignetes einfaches Mitnehmerglied besteht aus einer vor der Vorderseite des Buchsenträgers drehbar gelagerten Scheibe, die einen längs eines Durchmessers verlaufenden Schlitz enthält, der zu einer Randseite der Scheibe hin offen ist, um ein radiales Einführen der Leuchtenstifte zu ermöglichen. Mittels einer Feder ist die Scheibe in jene Stellung vorgespannt, in der der Schlitz gegenüber den Steckbuchsen verdreht ist.In order to close the sockets when the fluorescent lamp is removed, the driver member is rotatably mounted on the socket carrier according to the invention and closes the sockets in one of its two end positions, while in the other end position the light pins resting on the driver member are aligned with the sockets. A suitable simple driving element consists of a disk which is rotatably mounted in front of the front of the socket carrier and which contains a slot which runs along a diameter and is open towards an edge side of the disk in order to enable the lamp pins to be inserted radially. Means a spring, the disc is biased to the position in which the slot is rotated relative to the sockets.

Die Lagerung dieser Scheibe wird besonders einfach, wenn sie an ihrer Rückseite einen zylindrischen Zapfen trägt, der in einer Bohrung des Buchsenträgers drehbar gelagert ist, die zwischen den Bohrungen für die Steckbuchsen liegt.The storage of this disc is particularly easy if it carries a cylindrical pin on its back, which is rotatably mounted in a bore of the socket carrier, which lies between the holes for the sockets.

Um eine wechselweise Beschädigung oder Abnutzung der Vorderseite des Buchsenträgers und der freien Enden der Lampenstifte zu verhindern sowie eine Zentrierung der Lampen beim Einsetzen in die Leuchte zu verbessern, befindet sich bevorzugt an der Vorderseite des Gehäuses der Lampenfassung ein Abstandshalter mit einer Gleitfläche für die benachbarte Stirnseite der Leuchtstofflampe. Hierdurch werden die Lampenstifte zwangsläufig in einem kleinen Abstand über die Vorderseite des Euchsenträgers gehalten und können nicht auf diesem streifen.In order to prevent alternate damage or wear to the front of the socket carrier and the free ends of the lamp pins and to improve the centering of the lamps when inserted into the lamp, there is preferably a spacer on the front of the housing of the lamp holder with a sliding surface for the adjacent end face the fluorescent lamp. As a result, the lamp pins are inevitably held at a small distance from the front of the oak holder and cannot graze on it.

Die neue Lampenfassung ist so gestaltet, daß das Einsetzen und Herausnehmen der handelsüblichen Leuchtstofflampen mit Zweistiftsockel praktisch in der gleichen Weise geschieht, wie man dies von Lampenfassungen aus dem Nicht-Ex-Bereich her gewohnt ist. Allerdings wird bei der neuen Fassung der elektrische Kontakt mit den Lampenstiften nicht durch eine Schleifbewegung an orts. festen Kontakten in der Lampenfassung hergestellt, sondern die Drehbewegung der Leuchtstofflampe wird dazu ausgenutzt, um in dem Buchsenträger enthaltene Steckbuchsen zwangsläufig auf die Lampenstifte aufzuschieben.The new lamp holder is designed in such a way that the insertion and removal of the standard fluorescent lamps with a two-pin base is practically the same as that of lamp holders from the non-Ex area. However, in the new version, the electrical contact with the lamp pins is not caused by a grinding movement in place. fixed contacts in the lamp holder, but the rotary movement of the fluorescent lamp is used to inevitably push the sockets contained in the socket holder onto the lamp pins.

Infolge des Gewindes ist notwendigerweise der Drehwinkel der Leuchtstofflampe auf einen Drehhub zwischen zwei Endlagen begrenzt, was die Handhabung der Lampenfassung nach der Hauptanmeldung von den Lampenfassungen aus dem Nicht-Ex-Bereich unterscheidet. Die Leuchtstofflampe kann zum Herausnehmen aus der Lampenfassung nach der Hauptanmeldung jeweils nur in einer Richtung gedreht werden. Welche Richtung die richtige ist, hängt davon ab, auf welcher Seite der Leuchtstofflampe sich der Monteur jeweils zufälligerweise befindet.As a result of the thread, the angle of rotation of the fluorescent lamp is necessarily limited to a rotational stroke between two end positions, which makes the handling of the lamp holder after the main registration of the lamp holders distinguishes from the non-Ex area. The fluorescent lamp can only be rotated in one direction after removal from the lamp holder after the main login. Which direction is the right one depends on which side of the fluorescent lamp the fitter happens to be on.

Die mit dem Buchsenträger verbundene Anzeigeeinrichtung liefert dem Benutzer bzw. dem Monteur eine eindeutige Angabe, in welcher Endstellung sich der Buchsenträger befindet und in welche Richtung er zu drehen ist, um entweder die Leuchtstofflampe in die Fassung einzusetzen oder auf dieser herauszubekommen.The display device connected to the socket carrier provides the user or the fitter with an unambiguous indication of the end position of the socket carrier and the direction in which it is to be rotated in order to either insert the fluorescent lamp into the socket or to get it out.

Die Anzeigeeinrichtung enthält im einfachsten Falle ein Anzeigeelement, das gemeinsam mit dem Buchsenträger verstellbar ist. In wenigstens einem Anzeigefenster ist, je nach Endstellung, ein die mögliche Drehrichtung symbolisierendes Anzeigesymbol erkennbar. Je nach Drehwinkel bzw. Ausbildung des Anzeigeelementes können auch zwei Anzeigefenster vorhanden sein, die derart angeordnet sind, daß lediglich in einem der Anzeigefenster das die Drehrichtung symbolisierende Anzeigesymbol erkennbar ist.In the simplest case, the display device contains a display element that can be adjusted together with the socket carrier. Depending on the end position, a display symbol symbolizing the possible direction of rotation can be seen in at least one display window. Depending on the angle of rotation or the design of the display element, two display windows can also be provided, which are arranged in such a way that the display symbol symbolizing the direction of rotation can be recognized only in one of the display windows.

Insgesamt sehr einfache Verhältnisse ergeben sich, wenn das Anzeigeelement mit den Anzeigesymbolen von der Rastscheibe des Rastwerkes gebildet ist, die ohnehin die Drehbewegung des Buchsenträgers mitmacht. Die Anzeigesymbole sind in diesem Falle auf der Außenumfangsfläche der Rastscheibe angeordnet.Overall, very simple conditions result when the display element with the display symbols is formed by the locking disc of the locking mechanism, which in any case participates in the rotary movement of the socket carrier. In this case, the display symbols are arranged on the outer peripheral surface of the locking disk.

Die mögliche Drehrichtung läßt sich am einfachsten und unmißverständlichsten dadurch symbolisieren, daß als Anzeigesymbole Pfeile verwendet werden, die in die mögliche Drehrichtung weisen.The simplest and most unmistakable way of symbolizing the possible direction of rotation is to use arrows as display symbols which point in the possible direction of rotation.

Im übrigen sind Weiterbildungen der Erfindung Gegenstand von Unteransprüchen.For the rest, further developments of the invention are the subject of dependent claims.

In der Zeichnung sind Ausführungsbeispiele des Gegenstandes der Erfindung dargestellt. Es zeigen:

Fig. 1
ein erstes Ausführungsbeispiel der Lampenfassung in einer perspektivischen Explosionsdarstellung,
Fig. 2
einen Querschnitt durch den Buchsenträger nach Fig. 1,
Fig. 3
eine Draufsicht auf die Rückseite der Mitnehmerscheibe,
Fig. 4
eine Draufsicht auf die Rückseite der Lampenfassung nach Fig. 1, unter Veranschaulichung des Rastwerkes,
Fig. 5 und 6
das Lampengehäuse nach Fig. 1 in einem Längsschnitt parallel zu der Drehachse des Buchsenträgers, unter Veranschaulichung unterschiedlicher Stellungen des Buchsenträgers und
Fig. 7
ein weiteres Ausführungsbeispiel der erfindungsgemäßen Lampenfassung.
Exemplary embodiments of the subject matter of the invention are shown in the drawing. Show it:
Fig. 1
a first embodiment of the lamp holder in a perspective exploded view,
Fig. 2
2 shows a cross section through the socket carrier according to FIG. 1,
Fig. 3
a plan view of the back of the drive plate,
Fig. 4
2 shows a top view of the back of the lamp holder according to FIG. 1, illustrating the locking mechanism,
5 and 6
1 in a longitudinal section parallel to the axis of rotation of the socket carrier, illustrating different positions of the socket carrier and
Fig. 7
a further embodiment of the lamp holder according to the invention.

Fig. 1 zeigt eine die Vorschriften des Explosionsschutzes erfüllende Lampenfassung 1 für handelsübliche Leuchtstofflampen mit Zweistiftsockel. Die Lampenfassung 1 enthält ein etwa quaderförmiges Gehäuse 2, in dem sich eine durchgehende Bohrung 3 befindet. Die Bohrung 3 durchsetzt das Gehäuse 2 von dessen etwa planer Vorderseite 4 bis zu dessen Rückseite 5, die etwa parallel zu der Vorderseite 4 verläuft. Eine sich zwischen den beiden Seiten 4 und 5 erstreckende Seite 6 trägt Befestigungseinrichtungen 7 zum Anbringen der Lampenfassung 1 in einem nicht weiter gezeigten Leuchtengehäuse.1 shows a lamp holder 1 which meets the requirements of explosion protection for commercially available fluorescent lamps with a two-pin base. The lamp holder 1 contains an approximately cuboid housing 2 in which there is a through hole 3. The bore 3 passes through the housing 2 from its approximately planar front 4 to its rear 5, which runs approximately parallel to the front 4. A side 6 extending between the two sides 4 and 5 carries fastening devices 7 for attaching the lamp holder 1 in a lamp housing (not shown further).

Die Durchgangsbohrung 3 enthält ein zweigängiges Innengewinde 8 mit Rechteckquerschnitt und dient als Sitz für einen etwa zylinderförmigen Buchsenträger 9, der an seiner Außenumfangsfläche ein komplementäres Außengewinde 11 trägt. Die beiden Gewinde 8 und 11 bilden zusammen einen Schraubtrieb 12, mit dessen Hilfe der Buchsenträger 9 bei einer Drehung um seine Längsachse 13 in dem Gehäuse 2 axial beweglich ist.The through hole 3 contains a two-start internal thread 8 with a rectangular cross-section and serves as a seat for an approximately cylindrical socket carrier 9, which carries a complementary external thread 11 on its outer peripheral surface. The two threads 8 and 11 together form a screw drive 12, with the aid of which the socket carrier 9 is axially movable in the housing 2 when it rotates about its longitudinal axis 13.

Wie insbesondere Fig. 4 erkennen läßt, weist die Durchgangsbohrung 3 einen an die Rückseite 5 angrenzenden Abschnitt 14 auf, der einen größeren Durchmesser als das Gewinde 8 hat und der innen zylindrisch glatt ausgebildet ist. In dem Abschnitt 14 befindet sich ein Rastwerk 15, das von einer etwa sternförmigen Rastscheibe 16 sowie zwei mit der Rastscheibe 16 zusammenwirkenden Stößeln 17 gebildet ist. Die Rastscheibe 16 enthält insgesamt vier radial nach außen wegstehende Zacken oder Arme 18, zwischen denen jeweils eine Mulde 19 vorgesehen ist. Die Mulden 19 und die Zacken 18 sind längs dem Umfang der Rastscheibe 16 äquidistant verteilt und haben, jeder für sich, denselben Abstand von der Drehachse 13. Die Rastscheibe 16 ist einstückig an der Rückseite des Buchsenträgers 9 angeformt.As can be seen in particular in FIG. 4, the through-bore 3 has a section 14 adjoining the rear side 5, which has a larger diameter than the thread 8 and is internally cylindrical smooth. In the section 14 there is a locking mechanism 15 which is formed by an approximately star-shaped locking disc 16 and two plungers 17 which cooperate with the locking disc 16. The locking disk 16 contains a total of four radially outwardly projecting teeth or arms 18, between which a trough 19 is provided. The troughs 19 and the prongs 18 are distributed equidistantly along the circumference of the locking disk 16 and, each for themselves, have the same distance from the axis of rotation 13. The locking disk 16 is in one piece molded on the back of the socket carrier 9.

Seitlich neben dem Bohrungsabschnitt 14 befinden sich in dem Gehäuse 2 zwei im Querschnitt etwa rechteckige Taschen 21, die sich bezüglich der Drehachse 13 diametral gegenüberliegen und sich in Richtung auf den Bohrungsabschnitt 14 öffnen. In diesen Taschen 21 sind bezüglich der Rastscheibe 16 radial geführt die Stößel 17 angeordnet, die in ihrem Querschnitt an die Gestalt der Taschen 21 angepaßt sind. Sie tragen an ihrer der Rastscheibe 16 zugekehrten Vorderseite eine teilzylindrische Erhöhung 22, die auf der Außenumfangsfläche der Rastscheibe 16 entlangläuft; die beiden Stößel 17 sind gegeneinander austauschbar.On the side next to the bore section 14 there are two pockets 21 which are approximately rectangular in cross section and which are diametrically opposed with respect to the axis of rotation 13 and open in the direction of the bore section 14. In these pockets 21, the plungers 17 are arranged radially with respect to the locking disk 16, and their cross section is adapted to the shape of the pockets 21. They have on their front side facing the locking disk 16 a partially cylindrical elevation 22 which runs along the outer peripheral surface of the locking disk 16; the two plungers 17 are interchangeable.

In jedem der beiden Stößel 17 sind zwei Sackbohrungen 23 enthalten, in denen schraubenförmige Druckfedern 24 angeordnet sind. Die Druckfedern 24 stützen sich andernends an einer von der Rastscheibe 16 abliegenden Grundfläche 25 der Tasche 21 ab und drücken die Stößel 17 bis zur Anlage mit der Rastscheibe 16 vor.In each of the two plungers 17, two blind holes 23 are contained, in which helical compression springs 24 are arranged. The compression springs 24 are supported at the other end on a base surface 25 of the pocket 21 remote from the locking disk 16 and press the plungers 17 forward until they come into contact with the locking disk 16.

Damit die mit dem Buchsenträger 9 einstückig verbundene Rastscheibe 16 dessen Axialbewegung nicht behindert, ist die Tiefe des Bohrungsabschnittes 14, gemessen parallel zu der Drehachse 13, um die Dicke der Rastscheibe 16 tiefer ausgebildet, als es dem Hub des Buchsenträgers 9 entspricht. Eine entsprechend tiefe Ausdehnung, d.h. Ausdehnung in Richtung parallel zu der Drehachse 13, haben auch die beiden Stößel 17.So that the locking disk 16 connected in one piece to the socket carrier 9 does not hinder its axial movement, the depth of the bore section 14, measured parallel to the axis of rotation 13, is deeper by the thickness of the locking disk 16 than it corresponds to the stroke of the socket carrier 9. A correspondingly deep expansion, i.e. Expansion in the direction parallel to the axis of rotation 13, also have the two plungers 17th

Um die Stößel 17 in den Taschen 21 zu halten, ist auf der Rückseite 5 mittels nicht veranschaulichter Schrauben ein Deckel 26 befestigt, dessen Befestigungsschrauben in Innengewinde 27 des Gehäuses 2 eingeschraubt werden. Der Deckel 26 besitzt in Verlängerung des Buchsenträgers 9 eine in Fig. 1 ersichtliche torbogenförmige Öffnung 28.In order to hold the plunger 17 in the pockets 21, a cover 26 is fastened on the rear side 5 by means of screws (not illustrated), the fastening screws of which are screwed into the internal thread 27 of the housing 2. The cover 26 has an extension of the socket carrier 9 an archway-shaped opening 28 shown in FIG. 1.

Der innere Aufbau des Buchsenträgers 9 ergibt sich aus Fig. 2, aus der auch ersichtlich ist, wie die plane Rastscheibe 16 einstückig an dessen Rückseite angeformt ist.The inner structure of the socket carrier 9 results from FIG. 2, from which it can also be seen how the flat locking disk 16 is integrally formed on the rear side thereof.

Der Buchsenträger 9 ist mit zwei zueinander parallelen Durchgangsbohrungen 29 versehen, die von dessen Stirnseite 31 bis durch die Rastscheibe 16 hindurch und zu deren der Stirnseite 31 parallelen Rückseite 32 verlaufen. Beide Bohrungen 29 sind zu der Drehachse 13 parallel und sind so angeordnet, daß ihre Achsen in einer gemeinsamen Ebene mit der Drehachse 13 liegen und von dieser gleichen radialen Abstand haben. Der Mittenabstand der beiden Bohrungen 29 entspricht dem Mittenabstand von Lampenstiften 33, die an einer Stirnseite einer Leuchtstofflampe 34 axial hervorstehen.The socket carrier 9 is provided with two mutually parallel through bores 29 which run from its end face 31 to through the locking disk 16 and to the rear side 32 thereof which is parallel to the end face 31. Both bores 29 are parallel to the axis of rotation 13 and are arranged such that their axes lie in a common plane with the axis of rotation 13 and have the same radial distance from it. The center distance of the two bores 29 corresponds to the center distance of lamp pins 33, which protrude axially from an end face of a fluorescent lamp 34.

Die Bohrungen 29 sind in ihrem an der Stirnseite 31 beginnenden Abschnitt 35 zylindrisch und gehen im Bereich der Rastscheibe 16 in einen quadratisch vierkantigen Abschnitt 36 über, an den sich wiederum ein zylindrischer Bereich 37 größeren Durchmessers anschließt, der unmittelbar an die Rückseite 32 angrenzt.The bores 29 are cylindrical in their section 35 starting at the end face 31 and merge in the area of the locking disk 16 into a square-section section 36, which in turn is adjoined by a cylindrical area 37 of larger diameter, which directly adjoins the rear side 32.

In den so gestalteten Durchgangsbohrungen 29 sitzen zwei untereinander gleiche Steckbuchsen 38, die in den Bohrungen 29 Spiel haben.In the through bores 29 designed in this way there are two mutually identical sockets 38 which have play in the bores 29.

Jede der Steckbuchsen 38 besteht aus einem zylindrischen Abschnitt 41, der an seiner Vorderseite,die der Stirnseite 31 benachbart ist, eine koaxiale Sackbohrung 42 enthält, in der eine Multilamellenkontakthülse 43 angeordnet ist.Each of the sockets 38 consists of a cylindrical section 41, which on its front side, which is adjacent to the end face 31, contains a coaxial blind bore 42 in which a multi-lamellar contact sleeve 43 is arranged.

An ihrem rückwärtigen Ende ist jede Steckbuchse 38 mit einem Vierkantansatz 44 versehen, der quadratischen Querschnitt aufweist und sich im montierten Zustand in der vierkantigen Ausnehmung 36 befindet, um die Steckbuchse 38 gegen ein Drehen um ihre Längsachse zu sichern.At its rear end, each socket 38 is provided with a square shoulder 44, which has a square cross section and is in the assembled state in the square recess 36 in order to secure the socket 38 against rotation about its longitudinal axis.

In den Vierkantsatz 44 ist eine Nut 45 eingestochen, die einen Sprengring 46 hält, der über den Vierkant 44 übersteht. Dieser Sprengring 46 liegt im montierten Zustand in dem zylindrischen Bereich 37 und bewirkt die axiale Sicherung der Steckbuchse 38.A groove 45 is inserted into the square set 44, which holds a snap ring 46 which projects beyond the square 44. This snap ring 46 lies in the assembled state in the cylindrical region 37 and effects the axial securing of the socket 38.

Ein auf die Rückseite 32 der Rastscheibe 16 aufgeschraubter Deckel 47 legt die beiden Steckbuchsen 38 fest und enthält zum Durchtritt der Vierkantansätze 44 entsprechende vierkantige Öffnungen 48.A cover 47 screwed onto the rear side 32 of the locking disk 16 fixes the two sockets 38 and contains corresponding square openings 48 for the passage of the square attachments 44.

In dem Vierkantansatz 44 befinden sich bei beiden Steckbuchsen 38 jeweils eine Gewindesackbohrung 49 zur Aufnahme einer Klemmschraube 51.In the square neck 44 there is a threaded blind bore 49 for receiving a clamping screw 51 in each of the two sockets 38.

Mittig zwischen den beiden Bohrungen 29 liegt koaxial zu der Drehachse 13 eine Bohrung 52, in der ein zylindrischer Zapfen 53 einer Mitnehmerscheibe 54 drehbar gelagert ist. Die Mitnehmerscheibe 54 ist in Fig. 3 von der Rückseite her dargestellt und liegt flach auf der Stirnseite 32 auf. Der Außendurchmesser der Mitnehmerscheibe ist etwas kleiner als der Kerndurchmesser des Außengewindes 11 und sie hat einen parallel zu einem Durchmesser verlaufenden Schlitz 55, der sich bis über die Drehachse 13 erstreckt und den Rand der Scheibe 54 an einer Seite durchtrennt. An der Rückseite der Mitnehmerscheibe 54 ist der zylindrische Zapfen 53 einstückig angeformt, der aus einem Abschnitt 56 mit großem Durchmesser und einem längeren Zapfenabschnitt 57 mit kleinerem Durchmesser zusammensetzt. Der Abschnitt 57 ragt durch die Bohrung 52 vollständig hindurch, bis in den Raum hinter dem Deckel 47, wo er mit einer Ringnut 58 und einem darin sitzenden Sprengring 59 versehen ist. Auf dem Zapfenabschnitt 57 sitzt zwischen dem Abschnitt 56 mit dem größeren Durchmesser und einer in die Bohrung 52 vorspringenden Schulter eine Wickelfeder 61, die mit einem Ende in dem Buchsenträger 9 und mit dem anderen Ende in dem Zapfenabschnitt 56 steckt.In the middle between the two bores 29 there is a bore 52 coaxial to the axis of rotation 13, in which a cylindrical pin 53 of a drive plate 54 is rotatably mounted. The drive plate 54 is shown in FIG. 3 from the rear and lies flat on the end face 32. The outer diameter of the driving disk is slightly smaller than the core diameter of the external thread 11 and it has a slot 55 which runs parallel to a diameter and extends beyond the axis of rotation 13 and cuts through the edge of the disk 54 on one side. On the back of the drive plate 54, the cylindrical pin 53 is integrally formed, which consists of a section 56 with a large diameter and a longer pin section 57 with a smaller diameter. The section 57 extends completely through the bore 52 into the space behind the cover 47, where it is provided with an annular groove 58 and a snap ring 59 seated therein. On the pin section 57, between the section 56 with the larger diameter and a shoulder projecting into the bore 52, sits a clock spring 61 which is inserted at one end in the socket carrier 9 and at the other end in the pin section 56.

Die Mitnehmerscheibe 54 ist auf der Stirnseite 31 drehbegrenzt, wozu auf der Stirnseite 31 zwei flache Zapfen 62 vorstehen, die in nierenförmige Vertiefungen 63 eingreifen, die auf der Rückseite der Mitnehmerscheibe 54 vorgesehen sind.The driving plate 54 is rotationally limited on the end face 31, for which purpose two flat pins 62 protrude on the end face 31, which engage in kidney-shaped recesses 63 which are provided on the back of the driving plate 54.

Um ein Berühren der Stirnseite 31 durch die freien Enden der Lampenstifte 53 zu vermeiden, sind schließlich auf der Vorderseite 4 neben der Bohrung 3 zwei Anschläge 64 angeordnet, die mit der Stirnseite der Leuchtstofflampe 34 zusammenwirken.In order to avoid touching the end face 31 by the free ends of the lamp pins 53, two stops 64 are finally arranged on the front side 4 next to the bore 3, which cooperate with the end face of the fluorescent lamp 34.

Die insoweit beschriebene Lampenfassung 1 wird zusammen mit einer weiteren im Grunde gleich aufgebauten Lampenfassung in einem Leuchtengehäuse verwendet. Der einzige Unterschied, der zwischen den beiden Lampenfassungen innerhalb eines Leuchtengehäuses besteht, liegt darin, daß eine der Fassungen einen Schraubtrieb 12 mit Rechts- und die andere einen Schraubtrieb mit Linksgewinde hat, wie dies aus der nachfolgenden Funktionsbeschreibung ohne weiteres verständlich ist und sie im übrigen spiegelsymmetrisch sind.The lamp holder 1 described so far is used together with another lamp holder of basically the same construction in a lamp housing. The only difference that exists between the two lamp sockets within a lamp housing is that one of the sockets has a screw drive 12 with a right-hand thread and the other has a screw drive with a left-hand thread, as is readily understandable from the following description of the function, and the rest are mirror-symmetrical.

Als Ausgangspunkt für die Funktionsbeschreibung sei angenommen, daß zunächst keine Leuchtstofflampe 34-eingesetzt ist. In diesem Ruhezustand ist der Buchsenträger 9 in das Gehäuse 2 zurückgeschraubt, und zwar so weit, daß die Vorderseite der Mitnehmerscheibe 54 mit der Vorderseite 4 bündig ist. In diesem Zustand stehen die beiden Bohrungen 29 auf einer Linie, die etwa unter 45° zu der Seite 6 verläuft. Gleichzeitig hat die Wickelfeder 61 die Mitnehmerscheibe 54 auf der Stirnseite 31 in die zugehörige Ruhestellung verdreht, in der der Schlitz 55 ebenfalls etwa unter 45° zu der Linie verläuft, die durch die beiden Buchsen 29 definiert ist. Die Mitnehmerscheibe 54 verschließt die Öffnungen der Steckbuchsen 38. Ein weiteres Verdrehen der Mitnehmerscheibe 54 wird durch das Zusammenwirken der nierenförmigen Ausnehmungen 53 mit den zapfenförmigen Fortsätzen 62 verhindert.As a starting point for the functional description, it is assumed that no fluorescent lamp 34 is initially used. In this idle state, the socket carrier 9 is screwed back into the housing 2, to the extent that the front side of the drive plate 54 is flush with the front side 4. In this state, the two bores 29 are on a line that extends approximately at 45 ° to the side 6. At the same time, the clock spring 61 has rotated the driving disk 54 on the end face 31 into the associated rest position, in which the slot 55 likewise extends at approximately 45 ° to the line defined by the two bushings 29. The drive plate 54 closes the openings of the sockets 38. Further rotation of the drive plate 54 is prevented by the interaction of the kidney-shaped recesses 53 with the peg-shaped extensions 62.

In der Ruhestellung der Fassung 1 fluchtet der Schlitz 55 mit einer Nut 66 des Gehäuses 2, die radial bezüglich der Bohrung 3 verläuft und, wie Fig. 1 erkennen läßt, die der Wand 6 gegenüberliegende Wand durchsetzt. Die axiale Tiefe der Nut 66 ist so bemessen, daß ihr Nutengrund etwa mit der Stirnseite 31 fluchtet bzw. gegenüber dieser geringfügig zurückspringt.In the rest position of the socket 1, the slot 55 is aligned with a groove 66 of the housing 2, which extends radially with respect to the bore 3 and, as can be seen in FIG. 1, passes through the wall opposite the wall 6. The axial depth of the groove 66 is dimensioned such that its groove base is approximately aligned with the end face 31 or springs back slightly relative to the latter.

Eine selbsttätige Verdrehung des Buchsenträgers 9 aus der erläuterten Position heraus wird durch das Rastwerk 15 verhindert, dessen Stößel 17 in einander diametral gegenüberliegenden Mulden 19 eingreifen.An automatic rotation of the socket carrier 9 out of the explained position is prevented by the locking mechanism 15, the plunger 17 of which engage in diametrically opposed recesses 19.

Das Einsetzen der Leuchtstofflampe 34 in die explosionsgeschützte Lampenfassung 1 geschieht in ähnlicher Weise wie das Einsetzen derartiger Leuchten in nicht explosionsgeschützte Fassungen, indem die beiden Lampenstifte 33 an einer Stirnseite der Lampe 34 durch die Nut 66 eingeführt werden. Sie gleiten anschließend weiter durch den mit der Nut 66 fluchtenden Schlitz 55, bis schließlich eine weitere Einführbewegung dadurch begrenzt wird, daß der zuerst eingedrungene Lampenstift 33 am Ende des Schlitzes 55 angekommen ist.The insertion of the fluorescent lamp 34 into the explosion-proof lamp holder 1 takes place in a manner similar to the insertion of such lamps in non-explosion-proof sockets by the two lamp pins 33 are inserted at one end of the lamp 34 through the groove 66. They then slide further through the slot 55 aligned with the groove 66 until finally a further insertion movement is limited by the fact that the lamp pin 33 which has penetrated first has arrived at the end of the slot 55.

Nach dieser bezüglich der Drehachse 13 radial gerichteten Einführbewegung der Leuchtstofflampe 34 erfolgt nun eine Drehung der Leuchtstofflampe 34 um ihre Längsachse. Dabei wird zunächst nur die Mitnehmerscheibe 54 auf dem Buchsenträger 9 verdreht, bis die zapfenförmigen Fortsätze 62 in den nierenförmigen Ausnehmungen 63 die andere Anlage entgegen der Kraft der Wickelfeder 61 erreicht haben. In dieser Stellung verläuft der Schlitz 55 über die Mitte der beiden Bohrungen 29. Ohne die Anschläge 64 könnten die Lampenstifte 33 durch Axialbewegung der Leuchtstofflampe 34 in die Steckbuchsen 38 eingeführt werden. Wegen der Anschläge 64 ist diese Axialbewegung aber nicht möglich und die Lampenstifte 33 bleiben zunächst ohne Kontakt mit den Steckbuchsen 38,auf deren Bohrungen 42 sie fluchtend ausgerichtet sind.After this insertion movement of the fluorescent lamp 34, which is directed radially with respect to the axis of rotation 13, the fluorescent lamp 34 is now rotated about its longitudinal axis. First, only the driving disk 54 is rotated on the socket carrier 9 until the peg-shaped extensions 62 in the kidney-shaped recesses 63 have reached the other system against the force of the clock spring 61. In this position, the slot 55 runs over the center of the two bores 29. Without the stops 64, the lamp pins 33 could be inserted into the sockets 38 by axial movement of the fluorescent lamp 34. However, because of the stops 64, this axial movement is not possible and the lamp pins 33 initially remain without contact with the sockets 38, on the bores 42 of which they are aligned.

Würde in dieser Stellung die Leuchtstofflampe losgelassen werden, würde unter der Wirkung der Wickelfeder 61 die Mitnehmerscheibe 54 in die Ruhestellung zurückschnappen, in der ihr Schlitz 55 mit der Nut 66 ausgerichtet ist. Gleichzeitig werden die Steckbuchsen 38 wieder verschlossen und von außen unzugänglich. Somit wäre der sichere Zustand wieder erreicht.If the fluorescent lamp were released in this position, under the action of the clock spring 61, the drive plate 54 would snap back into the rest position, in which its slot 55 is aligned with the groove 66. At the same time, the sockets 38 are closed again and are inaccessible from the outside. So the safe state would be reached again.

Wenn jedoch nach Erreichen der anderen Anlagestellung der Mitnehmerscheibe 54 entgegen der Kraft der Wickelfeder 61 nicht losgelassen wird, sondern in dieser Richtung weitergedreht wird, wird von den Lampenstiften 33 über die Mitnehmerscheibe 54 nunmehr der Buchsenträger 9 verdreht. Der Schraubtrieb 12 setzt die Drehbewegung in eine axiale Vorschubbewegung des Buchsenträgers 9 um, dessen Steckbuchsen 38 entsprechend der Drehbewegung axial in Richtung auf die Lampenstifte 33 vorgeschoben werden. Gleichzeitig damit werden die Stößel 17 gegen die Wirkung der Druckfedern 24 von der Rastscheibe 16 in die Taschen 21 zurückgedrückt.If, however, after reaching the other contact position of the driving disk 54 against the force of the clock spring 61, it is not released, but is rotated further in this direction, the socket pins 9 are now rotated by the lamp pins 33 via the driving disk 54. The screw drive 12 converts the rotary movement into an axial feed movement of the socket carrier 9, the sockets 38 of which are pushed axially in the direction of the lamp pins 33 in accordance with the rotary movement. At the same time, the plungers 17 are pressed back against the action of the compression springs 24 by the locking disk 16 into the pockets 21.

Das Rastwerk 15 hat solange die Tendenz, die Rastscheibe 16 in die Ausgangsstellung zurückzudrehen, bis der Totpunkt des Rastwerks 15 überschritten wird, der dadurch gekennzeichnet ist, daß die zylindrischen Erhöhungen 22 auf den Spitzen der Zacken 18 zu liegen kommen. Nach Überschreiten des Totpunktes hat das Rastwerk 15 die Tendenz, die Rastscheibe 16 in die andere stabile Lage in Bewegungsrichtung weiterzudrehen, bis die teilzylindrischen Erhöhungen 22 in den benachbarten Mulden 19 liegen. Bei dem gezeigten Ausführungsbeispiel ist der Drehwinkel zwischen den beiden stabilen Lagen des Rastwerkes 15 90°. Während dieser 90°-Drehung wird der Buchsenträger 9 so weit vorgeschoben, daß die in den Steckbuchsen 38 enthaltenen Lamellenkontakte 43 satt bzw. vollständig auf die zuhörigen Lampenstifte 33 aufgeschoben sind.The locking mechanism 15 has the tendency to turn the locking disc 16 back into the starting position until the dead center of the locking mechanism 15 is exceeded, which is characterized in that the cylindrical elevations 22 come to rest on the tips of the teeth 18. After the dead center has been exceeded, the locking mechanism 15 tends to continue to rotate the locking disc 16 into the other stable position in the direction of movement until the partially cylindrical elevations 22 lie in the adjacent depressions 19. In the embodiment shown, the angle of rotation between the two stable positions of the locking mechanism 15 is 90 °. During this 90 ° rotation, the socket carrier 9 is advanced so far that the lamella contacts 43 contained in the sockets 38 are pushed fully or completely onto the associated lamp pins 33.

Während der gesamten Drehung werden durch die Mitnehmerscheibe 54 bzw. dem darin enthaltenen Schlitz 55 die Lampenstifte 33 in fluchtender Ausrichtung mit den Steckbuchsen 38 gehalten. Dabei sind die relativen Bemessungen so gewählt, daß noch vor Erreichen des Totpunktes in dem Rastwerk 15 die freien Enden der Lampenstifte 33 zumindest geringfügig in die Bohrungen 42 oder sogar bereits in die von den Lamellenkontakten 43 definierte Hülse eintauchen, damit nach Überschreiten des Totpunktes nicht eventuell der Buchsenträger 9 der Mitnehmerscheibe 54 voreilt und die Fluchtung zwischen den Leuchtenstiften 33 und den Steckbuchsen 38 verlorengeht.During the entire rotation, the lamp pins 33 are held in alignment with the sockets 38 by the drive plate 54 or the slot 55 contained therein. Here are the relative ones Dimensions selected so that even before reaching the dead center in the locking mechanism 15, the free ends of the lamp pins 33 are at least slightly immersed in the bores 42 or even in the sleeve defined by the lamella contacts 43, so that after the dead center is reached, the socket carrier 9 may not Drive disc 54 leads and the alignment between the lamp pins 33 and the sockets 38 is lost.

Bis zum Erreichen des Totpunktes in dem Rastwerk 15 wirkt sowohl das Rastwerk 15 als auch die Wickelfeder 61 in dem Sinne, daß bei einem Loslassen der Leuchtstofflampe 34 diese in eine Stellung zurückgedreht wird, in der ihre Leuchtenstifte 33 durch die Nut 66 wieder herausgleiten können. Erst nach Überschreiten des Totpunktes wirkt das Rastwerk 15 im Sinne eines selbsttätigen Vollendens der Drehbewegung der Leuchtstofflampe 34 beim Einsetzen. Wenn nach dem Totpunkt die Leuchtstofflampe 34 losgelassen wird, schnappt das Rastwerk 15 in die andere Endlage, die gleichbedeutend ist mit dem maximalen axialen Vorschub des Buchsenträgers 9 in Richtung auf den Anschlag 64 bzw. die Stirnseite der Leuchtstofflampe 34. Um diese Endstellung zu erreichen, muß die Lampe um einen Drehwinkel gedreht werden, der gleich der Summe der Drehwinkel in dem Rastwerk 15 zuzüglich dem Drehwinkel der Mitnehmerscheibe 54 zwischen den beiden durch die nierenförmigen Ausnehmungen 63 begrenzten Winkelbereich ist. Bei dem erläuterten Ausführungsbeispiel sind das ca. 135°.Until the dead center in the locking mechanism 15 is reached, both the locking mechanism 15 and the coil spring 61 act in the sense that when the fluorescent lamp 34 is released, it is rotated back into a position in which its lamp pins 33 can slide out again through the groove 66. Only after the dead center has been exceeded does the catch mechanism 15 act in the sense of the automatic completion of the rotary movement of the fluorescent lamp 34 when it is inserted. If the fluorescent lamp 34 is released after the dead center, the catch mechanism 15 snaps into the other end position, which is synonymous with the maximum axial advance of the socket carrier 9 in the direction of the stop 64 or the end face of the fluorescent lamp 34. In order to achieve this end position, the lamp must be rotated by an angle of rotation which is equal to the sum of the angles of rotation in the locking mechanism 15 plus the angle of rotation of the drive plate 54 between the two angular ranges delimited by the kidney-shaped recesses 63. In the exemplary embodiment explained, this is approximately 135 °.

Zum Herausnehmen der Leuchtstofflampe 34 wird sie in der entgegengesetzten Richtung gedreht, wodurch der Schraubtrieb 9 den Buchsenträger von den Lampenstiften 33 herunterzieht. Die beiden Endstellungen des Buchsenträgers sind in den Fig. 5 und 6 veranschaulicht, wobei Fig. 5 den völlig zurückgezogenen Buchsenträger zeigt, wenn die in dem Schlitz 55 befindlichen Lampenstifte 33 frei über die Stirnseite 31 laufen können, während Fig. 6 den Zustand veranschaulicht, bei dem die Steckbuchsen 38 auf die Lampenstifte 33 vollständig aufgeschoben sind.To remove the fluorescent lamp 34, it is rotated in the opposite direction, as a result of which the screw drive 9 pulls the socket carrier down from the lamp pins 33. The two end positions of the socket carrier 5 and 6 are illustrated, with FIG. 5 showing the socket holder fully retracted when the lamp pins 33 located in the slot 55 can run freely over the end face 31, while FIG. 6 illustrates the state in which the sockets 38 are completely pushed onto the lamp pins 33.

Da, wie erwähnt, in einem Leuchtengehäuse zwei der beschriebenen Lampenfassungen 1 vorhanden sind, die spiegelsymmetrisch zueinander sind, ist beispielsweise zum Herausnehmen der Leuchtstofflampe 34 entweder eine Rechts- oder eine Linksdrehung erforderlich, je nachdem, auf welche der beiden Lampenfassungen 1 der Benutzer gerade sieht. Die mögliche Drehrichtung ist bei der bislang beschriebenen Ausführungsform nur bei genauem Hinsehen auf das an der Vorderseite 4 der Lampenfassung 1 erkennbare Innengewinde festzustellen. Gemäß einer Weiterbildung ist die Lampenfassung 1 deswegen mit einer Anzeigeeinrichtung 71 versehen, die die Rastscheibe 16 sowie zwei in dem Gehäuse 2 befindliche Anzeigefenster 72 und 73 umfaßt.Since, as mentioned, two of the lamp holders 1 described are present in a lamp housing and are mirror-symmetrical to one another, for example, to remove the fluorescent lamp 34, either a right or a left turn is required, depending on which of the two lamp holders 1 the user is looking at . The possible direction of rotation in the embodiment described so far can only be determined by looking closely at the internal thread recognizable on the front side 4 of the lamp holder 1. According to a further development, the lamp holder 1 is therefore provided with a display device 71 which comprises the locking disk 16 and two display windows 72 and 73 located in the housing 2.

Das Gehäuse 2 ist auf seiner der Seite 6 gegenüberliegenden Seite mit einer teilzylindrischen Erhöhung 74 versehen, die konzentrisch zu der durchgehenden Bohrung 3 für den Buchsenträger 9 liegt. Die teilzylindrische Erhöhung 74, die sich aus dem Gehäuse 2 konvex vorwölbt, reicht von der Vorderseite 4 bis zu dem Deckel 26. Dort, wo sich innerhalb des Gehäuses 2 das Rastwerk 15 befindet, sind in der teilzylindrischen Erhöhung 74 die beiden Anzeigefenster 72 und 73 ausgespart, die eine Ausdehnung, gemessen parallel zu der Längsachse der Bohrung 3 haben, die gleich dem möglichen Hub des Buchsenträgers 9 zuzüglich der Stärke der Rastscheibe 16 ist. Die rechteckigen Anzeigefenster 72 und 73 liegen symmetrisch bezüglich einer Hochachse, die durch die Längsachse der Bohrung 3 geht und auf der Seite 6 des Gehäuses 2 senkrecht steht; beide Anzeigefenster 72 und 73 sind durch einen Steg 75 voneinander getrennt.The housing 2 is provided on its side opposite the side 6 with a partially cylindrical elevation 74 which is concentric with the through bore 3 for the socket carrier 9. The partially cylindrical elevation 74, which bulges convexly from the housing 2, extends from the front side 4 to the cover 26. Wherever the locking mechanism 15 is located within the housing 2, the two display windows 72 and 73 are located in the partially cylindrical elevation 74 recessed, which have an extent, measured parallel to the longitudinal axis of the bore 3, which is equal to the possible stroke of the socket carrier 9 plus the strength of the Locking disc 16 is. The rectangular display windows 72 and 73 are symmetrical with respect to a vertical axis which passes through the longitudinal axis of the bore 3 and is perpendicular to the side 6 of the housing 2; both display windows 72 and 73 are separated from one another by a web 75.

Die Rastscheibe 16 bildet das Anzeigeelement, das mit den Anzeigefenstern 72 und 73 zusammenwirkt. Zu diesem Zweck ist der Zacken 18′ auf seiner Außenumfangsfläche mit zwei in Gestalt von Pfeilen ausgebildeten Anzeigesymbolen 76 und 77 versehen. Die beiden Pfeile 76 und 77 weisen in unterschiedliche Richtung, jedoch liegen beide parallel zur Umfangsrichtung bezüglich der Drehbewegung des Buchsenträgers 9.The locking disk 16 forms the display element which interacts with the display windows 72 and 73. For this purpose, the prongs 18 'is provided on its outer peripheral surface with two display symbols 76 and 77 in the form of arrows. The two arrows 76 and 77 point in different directions, but both are parallel to the circumferential direction with respect to the rotational movement of the socket carrier 9.

Die Wirkungsweise sowie das Zusammenspiel der Anzeigeeinrichtung 71 ist wie folgt: Wenn der Buchsenträger 9 in seiner Ausgangsstellung steht, die ein Einsetzen der Leuchtstofflampe 34 gestattet, befindet sich das Rastwerk 15 in der in Fig. 5 gezeigten Stellung. In dieser Stellung liegt die Rastscheibe 16 dem Deckel 26 unmittelbar benachbart und der Zacken 18′ steht unterhalb des Anzeigefensters 72, so daß durch das Anzeigefenster 82 hindurch der Pfeil 77 zu sehen ist. Dieser Pfeil weist in Fig. 1 nach rechts und besagt, daß der Buchsenträger 9, ausgehend von dieser Endstellung, um 90° nach rechts drehbar ist. Wenn der Benutzer die Leuchtstofflampe 34 einsetzen will, braucht er nur der durch den Pfeil 77 gewiesenen Drehrichtung zu folgen. Durch eine Drehung in dieser Richtung wird der Buchsenträger 9 in dem Gewinde 8 zu der Vorderseite 4 geschraubt, wobei sich der Zacken 18′ von dem Anzeigefenster 72 zu dem Anzeigefenster 73 hin bewegt.The mode of operation and the interaction of the display device 71 are as follows: When the socket carrier 9 is in its initial position, which allows the fluorescent lamp 34 to be inserted, the catch mechanism 15 is in the position shown in FIG. 5. In this position, the locking disc 16 is the lid 26 immediately adjacent and the prongs 18 'is below the display window 72, so that the arrow 77 can be seen through the display window 82 therethrough. This arrow points to the right in FIG. 1 and indicates that, starting from this end position, the socket carrier 9 can be rotated through 90 ° to the right. If the user wants to use the fluorescent lamp 34, he only has to follow the direction of rotation indicated by the arrow 77. By rotating in this direction, the socket carrier 9 is screwed into the thread 8 to the front 4, the prongs 18 'moving from the display window 72 to the display window 73.

Gleichzeitig vollführt die Rastscheibe 16 eine translatorische Bewegung von dem Deckel 26 in Richtung auf die Vorderseite 4. In der schließlich erreichten Endstellung nach einer 90°-Drehung des Buchsenträgers 9 steht der Zacken 18′ hinter dem Anzeigefenster 83, das jetzt den Blick auf den Pfeil 76 freigibt, der in der entgegengesetzten Richtung im Sinne einer Linksdrehung weist. Unter dem Anzeigefenster 82 steht jetzt ein anderer Zacken 18 der Rastscheibe 16, der keinerlei Anzeigesymbole trägt, so daß die Anzeige eindeutig ist. Es wäre allerdings auch möglich, auf diesen Zacken ebenfalls einen Anzeigepfeil aufzubringen, der dieselbe Richtung weist wie der Pfeil 76. In jedem Falle bekommt der Benutzer einen klaren Hinweis, in welche Richtung die Leuchtstofflampe 34 zu drehen ist, um sie aus der Lampenfassung 1 herausnehmen zu können.At the same time, the locking disk 16 performs a translatory movement from the cover 26 in the direction of the front side 4. In the end position finally reached after a 90 ° rotation of the socket carrier 9, the prongs 18 'are behind the display window 83, which is now the view of the arrow 76 releases that points in the opposite direction in the sense of a left turn. Under the display window 82 is now another prong 18 of the locking disc 16, which has no display symbols, so that the display is clear. However, it would also be possible to also apply a display arrow to these prongs, which points in the same direction as the arrow 76. In any case, the user receives a clear indication of the direction in which the fluorescent lamp 34 is to be rotated in order to remove it from the lamp holder 1 to be able to.

Im übrigen ist es genauso möglich, auch im Anzeigefenster 73 einen Pfeil mit der Richtung des Pfeils 77 sichtbar zu machen, wenn sich der Buchsenträger 9 in seiner Ausgangsstellung zum Einsetzen einer Leuchtstofflampe befindet.Otherwise, it is also possible to make an arrow visible in the display window 73 with the direction of the arrow 77 when the socket carrier 9 is in its starting position for inserting a fluorescent lamp.

Bei dem in Fig. 7 gezeigten Ausführungsbeispiel der Lampenfassung 1 ist der Buchsenträger 9 selbst axial unverschieblich. Die Axialbewegung wird stattdessen von den Steckbuchsen 38 erbracht, die längsverschieblich in dem Buchsenträger 9 sitzen.In the exemplary embodiment of the lamp holder 1 shown in FIG. 7, the socket carrier 9 itself is axially immovable. The axial movement is instead provided by the sockets 38, which are longitudinally displaceable in the socket carrier 9.

Die Bohrung 3 ist eine Stufenbohrung und erweitert sich in Richtung auf die Rückseite 5 bei 82. In der Stufenbohrung 3 sitzt der außen in diesem Bereich glattwandige Buchsenträger 9, der mit einem radial vorstehenden Bund 83 in der Erweiterung 82 läuft. Eine auf die Rückseite 5 aufgeschraubte Halteplatte 74 sichert den Buchsenträger 9 gegen axiales Verschieben in dem Gehäuse 2. Der Buchsenträger 9 ist über die Halteplatte 54 hinaus verlängert und trägt dort das Außengewinde 11, auf dem eine Mutter 85, die das Innengewinde 8 enthält, aufgeschraubt ist. Die Mutter 85 bildet zusammen mit dem Außengewinde 11 den vorerwähnten Schraubtrieb 12. Sie ist mit einem von dem Gehäuse 2 weg weisenden rohrförmigen Fortsatz 86 versehen, an dessen freiem Ende eine Scheibe 87 durch nicht weiter veranschaulichte Schrauben aufgeschraubt ist.The bore 3 is a stepped bore and widens in the direction of the rear side 5 at 82. The stepped bore 3 has the socket carrier 9 which is smooth-walled on the outside in this area and runs with a radially projecting collar 83 in the extension 82. A holding plate 74 screwed onto the rear side 5 secures the socket carrier 9 against axial displacement in the housing 2. The socket carrier 9 is extended beyond the holding plate 54 and carries the external thread there 11, on which a nut 85, which contains the internal thread 8, is screwed on. The nut 85 forms, together with the external thread 11, the aforementioned screw drive 12. It is provided with a tubular extension 86 pointing away from the housing 2, on the free end of which a washer 87 is screwed on by screws (not shown).

Die beiden Steckbuchsen 38 sind in dem Buchsenträger 9 axial verschieblich und ragen über dessen rückwärtiges Ende hinaus. Sie enden in einem Schubstück 88, das drehbar und axial gesichert in einer zu dem Buchsenträger 9 konzentrischen Bohrung 89 der Scheibe 87 sitzt.The two sockets 38 are axially displaceable in the socket carrier 9 and protrude beyond the rear end thereof. They end in a thrust piece 88 which is rotatably and axially secured in a bore 89 of the disk 87 which is concentric with the socket carrier 9.

Was die Lagerung der Mitnehmerscheiben 54 anbelangt, so ist im übrigen die Anordnung wie vorher beschrieben.As far as the storage of the driving disks 54 is concerned, the arrangement is otherwise as previously described.

Beim Drehen der Leuchtstofflampe 34 um ihre Längsachse wird der Buchsenträger 9 mitgedreht, was der Schraubtrieb 12 in eine Axialbewegung der undrehbar, aber axial verschieblich geführten Mutter 75 umsetzt. Diese Axialbewegung wird auf die beiden Steckbuchsen 38 übertragen, die in ihrem vorderen Ende, wie vorher,die Lamellenkontakte 43 enthalten.When the fluorescent lamp 34 is rotated about its longitudinal axis, the socket carrier 9 is also rotated, which converts the screw drive 12 into an axial movement of the nut 75, which is guided so as to be non-rotatable but axially displaceable. This axial movement is transmitted to the two sockets 38 which, as before, contain the lamella contacts 43 in their front end.

Auf diese Weise wird erreicht, daß ohne Axialbewegung des Buchsenträgers 9 nur die Steckbuchsen 38 die Axialbewegung vollführen.In this way it is achieved that without the axial movement of the socket carrier 9 only the sockets 38 carry out the axial movement.

Claims (29)

  1. An explosion-protected lamp fitting (1) for a two pin socket lamp (34) having a housing (2) and having two bores (29) provided in the housing and opening on a front face (4) of the housing (2), whose axes run parallel to and at a distance from each other, corresponding to the distance between the lamp pins (33), and of which at least one contains an axially secured bush (38), also having connection means electrically connected to the at least one bush (38), characterised in that the bores (29) for the lamp pins (33) are contained in a socket mount (9), in that the socket mount (9) is housed in a bore (3) of the housing (2) so that it may rotate on an axis (13), which runs parallel to and symmetrical with the axes of the bores (29) for the lamp pins (33), in that a screw coupling (12) is provided and coupled with the socket mount (9), through which the at least one bush (38) may be slid backwards and forwards along its axis in conjunction with the rotation of the socket mount (9) so that the at least one bush (38) may be pushed onto or retracted from the associated lamp pin (33), and in that the socket mount (9) bears on its front side facing the lamp pin (33) a driver member (54) that can be made to engage with the lamp pins (33).
  2. A lamp fitting in accordance with claim 1, characterised in that a bush (38) sits in each of the two bores (29) for receiving the lamp pins (33).
  3. A lamp fitting in accordance with claim 1, characterised in that the bush or bushes (38) are arranged directly in the socket mount (9) and in a way that they are not axially slidable.
  4. A lamp fitting in accordance with claim 3, characterised in that the screw coupling (12) comprises an external thread (11) provided on an externalsurface of the socket mount (9) and an internal thread (8) in the bore of the housing (2)
  5. A lamp fitting in accordance with claim 1, characterised in that the screw coupling (12) is multi-threaded.
  6. A lamp fitting in accordance with claim 1, characterised in that a check mechanism (15) is coupled with the screw coupling (12) with two stable end positions, of which one of the end positions corresponds to the completely retracted bush (38) and the other end position corresponds to a position of the bush (38) in which the bush (38) is pushed onto the associated lamp pin (33).
  7. A lamp fitting in accordance with claim 6, characterised in that the rotary angle in the check mechanism (15) between the two end positions is at least 90°.
  8. A lamp fitting in accordance with claim 6, characterised in that the check mechanism (15) contains a cam track (16) and at least one spring-mounted push rod (17) running on the cam track (16).
  9. A lamp fitting in accordance with claim 8, characterised in that the cam track is arranged on a check disc (16) that is joined to the socket mount (9) so that it may not rotate and in that at least one push rod (17) is guided slidably in the housing (2).
  10. A lamp fitting in accordance with claim 8, characterised in that two cam shafts (17) are provided, which are positioned diametrically opposed to each other relative to the axis of rotation (13) of the screw coupling (12).
  11. A lamp fitting in accordance with claim 1, characterised in that the socket mount (9) is rotatably mounted in the housing (2) but not axially slidable and at least one of its bores (29) for the lamp pins (33) is a through-bore, in which the at least one bush (38), which is slidable lengthwise, sits and in that the screw coupling (12) comprises an external thread (11) on the socket mount (9) and a nut (85) coupled with the bush (38), this nut being secured against turning with it.
  12. A lamp fitting in accordance with claim 11, characterised in that the two bores (29) for the lamp pins (33) are provided with bushes (38), which are joined with each other at their ends away from the lamp pins (33) and are rotatably coupled with the nut (85).
  13. A lamp fitting in accordance with claim 1, characterised in that the driver member (54) is rotatably mounted on the socket mount (9) and may be rotated backwards and forwards between two end positions, whereby in one position the bores (29) for the lamp pins (33) are closed and in the other end position the lamp pins (33) lying adjacent to the driver member (54) are flush with the bores (29).
  14. A lamp fitting in accordance with claim 13, characterised in that the driver member (54) is biased into the position in which the bores (29) for the lamp pins (33) are closed.
  15. A lamp fitting in accordance with claim 13, characterised in that the driver member (54) is a disc, which contains a groove (55) running along a diameter and open on only one side of the disc, and in that the groove (55) in its groove floor is open in at least those positions that are flush with the bores (29) when the groove is aligned with the bores (29).
  16. A lamp fitting in accordance with claim 15, characterised in that the disc (54) bears a coaxial cylindrical spigot (56, 57) on its rear surface facing the front face (31) of the socket mount, which is rotatably housed in a bore (52) of the socket mount (9) and surrounded by a coil spring (61), which is supported at one end on the socket mount (9) and at the other end on the disc (54).
  17. A lamp fitting in accordance with claim 1, characterised in that the front face (4) of the housing (2) is provided with a spacing device (64) positioned adjacent to the socket mount (9), which bears a stop surface at right angles to the axis of rotation (13) of the socket mount (9), whose distance from the front face (31) of the socket mount (9) is slightly greater than the length of the lamp pins (33).
  18. A lamp fitting in accordance with claims 13 and 17, characterised in that the height of the screw coupling (12) between its two end positions is smaller than or equal to the length of the lamp pins (33) less the thickness of the driver member (54), measured parallel to the axis of rotation of the socket mount (9).
  19. A lamp fitting in accordance with claim 1, characterised in that the socket mount (9) has assigned to it an indicator mechanism (71) for indicating the rotational status or possible rotational direction of the socket mount (9).
  20. A lamp fitting in accordance with claim 19, characterised in that the indicator mechanism (71) comprises at least one display window (72, 73) arranged in the housing (2) as well as an indicator element (16), provided with at least one symbol (76, 77), that is coupled with the socket mount (9) and may be regulated in conjunction with it.
  21. A lamp fitting in accordance with claim 19, characterised in that the indicator mechanism (71) has two display windows (72, 73) arranged in the housing (2), configured in such a way that when the socket mount (9) has reached its respective end position the display symbol (76, 77) is visible in only one of the two display windows (72, 73).
  22. A lamp fitting in accordance with claim 21, characterised in that the two display windows (72, 73) lie adjacent to each other in relation to the circumferential direction of the socket mount (9).
  23. A lamp fitting in accordance with claim 20, characterised in that the indicator element (16) is integral with the socket mount (9) in rotation.
  24. A lamp fitting in accordance with claim 23, characterised in that the indicator element (16) is integral with the socket mount (9).
  25. A lamp fitting in accordance with claim 23 having a check mechanism with a check disc, characterised in that the check disc (16) constitutes the indicator element.
  26. A lamp fitting in accordance with claim 25, characterised in that the indicator symbols (76, 77) are arranged on the outer circumferential surface of the check disc (16).
  27. A lamp fitting in accordance with claims 20 and 21, characterised in that the indicator mechanism (71) has two indicator symbols (76, 77) on the indicator element (16) and the arrangement of the indicator symbols (76, 77) as well as the display windows (72, 73) is such that when the socket mount (9) is in the end positions respectively only one indicator symbol (76, 77) is aligned with one window (72, 73).
  28. A lamp fitting in accordance with claim 1 or 9, characterised in that the indicator symbol or symbols are respectively arrows (76, 77), of which one is pointing in one of the possible rotational directions of the socket mount (9) and the other in the opposite direction.
  29. A lamp fitting in accordance with claims 7 and 10, characterised in that the indicator symbols (76, 77) lie between two adjacent check flutes (19) of the check disc (16).
EP90115613A 1989-12-28 1990-08-15 Explosion-protected lamp holder Expired - Lifetime EP0438630B1 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE19893943065 DE3943065C1 (en) 1989-12-28 1989-12-28 Explosion-protected lamp holder or socket for two-pin base lamp - has two borings in housing arranged in parallel to axis of rotation
DE3943065 1989-12-28
DE4010457A DE4010457A1 (en) 1989-12-28 1990-03-31 Explosion-protected lamp-holder - has bush and housing with axial movement for pins to engage contacts
DE4010457 1990-03-31

Publications (2)

Publication Number Publication Date
EP0438630A1 EP0438630A1 (en) 1991-07-31
EP0438630B1 true EP0438630B1 (en) 1994-12-14

Family

ID=25888553

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90115613A Expired - Lifetime EP0438630B1 (en) 1989-12-28 1990-08-15 Explosion-protected lamp holder

Country Status (3)

Country Link
EP (1) EP0438630B1 (en)
AT (1) ATE115782T1 (en)
DE (2) DE4010457A1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9946013B2 (en) 2014-09-18 2018-04-17 Cooper Technologies Company Indicator lights
CN107023810A (en) * 2017-02-09 2017-08-08 顾彩晓 A kind of lighting lamp device
CN109424889A (en) * 2017-08-31 2019-03-05 深圳市海洋王照明工程有限公司 Antiexplosive working lamp
CN111189037B (en) * 2019-07-15 2022-03-04 深圳市海洋王照明工程有限公司 LED explosion-proof portable movable lamp

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1199883B (en) * 1964-12-23 1965-09-02 Adolf Schuch K G Lichttechnisc Contact protection safe, explosion-proof socket pair for single-pin base fluorescent lamps
DE7103967U (en) * 1971-02-03 1971-08-26 Mellert H Fabrik Fuer Feinmechanik Und Elektrotechnik Rotary lock holder for fluorescent lamps
DE3621960A1 (en) * 1986-07-01 1988-01-14 Wagner Robert EXPLOSION-PROTECTED LAMP AND LAMP FOR DOUBLE-PIN BASE FLUORESCENT LAMPS

Also Published As

Publication number Publication date
DE59008023D1 (en) 1995-01-26
EP0438630A1 (en) 1991-07-31
DE4010457A1 (en) 1991-10-02
ATE115782T1 (en) 1994-12-15

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