EP1591715B1 - Safety lamp with cover consisting of several parts - Google Patents

Abstract

A coupling part (40) is solidly connected to an inner cover (80), while a plug part (30) is solidly connected to a lamp support (11). The contacts between the coupling and plug parts run in the axial direction of a light tube (10) and are positioned in a collinear fashion such that the coupling and plug parts can be connected and disconnected by rotating an adjusting ring (70). The coupling part locks in rotationally secure but detachable fashion with the inner cover part through a coupling part holder (50), while the plug part locks in rotationally secure but detachable fashion with the lamp support via a plug part holder (20). The locking collar (51) of the coupling part holder projects into the inner cover part, with the radially-elastic locking tabs (52) of the coupling part holder engages with the corresponding click-in holes (82) in the inner cover. The adjusting ring is connected in axially solid fashion to but can rotate relative to an outer cover (60). The adjusting ring has an inner ring (74) rotatably mounted within the outer cover, with the outer cover having projections (64) which projects radially inwards to engage the circular groove in the adjusting ring.

Description

The invention is based on the DE 195 01 327 C2 known light. Similar luminaires are known DE 102 19 328 A1 . DE 100 10 518 C2 and DE-GM 71 29 201 ,

Basically, such lamps have a transparent tube of glass or plastic, which is closed on both sides with the open ends of the tube to be used lid parts. On a bulb holder, usually a support profile, within the tube, the light source, usually a fluorescent lamp, with its sockets and the necessary components for operation, such as ballasts, starters and the like, attached.

Since the protective tube light is to be used in damp rooms or under certain circumstances even under water, it depends on a tight closure means of the lid parts crucial. Not unproblematic here is the opening and reclosing of the luminaire when it is connected or when changing the bulb.

For this purpose, usually equipped with sealing rings two-piece cover are used. With the help of provided on the lid parts Spannkonen the sealing ring is pressed radially outward against the inner wall of the lamp tube when contraction of the cover parts and thus sealed the light.

In this construction, various shortcomings have resulted in practice.

When opening or closing the lid, the rotational movement of the lid parts can be transferred to the bulb holder and this turn itself, so that the required positioning of the lamp is not always guaranteed. Also, the electrical leads or their connection contacts can be twisted by frequent twisting and damaged.

In addition, if the power supply is not interrupted, short-circuiting may occur when changing the lamp.

Finally, with production-related large tolerances of the lamp tubes, the required tightness is not always guaranteed, since the clamping cones with the sealing ring in some cases, the differences that occur can not be bridged.

Thus, the present invention, the object of the invention to provide a luminaire, which does not have the above-mentioned shortcomings, so that it is easy to assemble and use.

Solved the task is with the features of claim 1.

According to this proposal, a two-part closure cap is proposed with a collar in which a plug part and a coupling part is provided for the electrical connection, which are brought into engagement or disengagement upon rotation of the adjusting ring. At the same time a radially expandable sealing ring provides the necessary tightness of the closure.

The advantage of the inventively designed lid is that when opening or closing the inventively designed lid by rotating the adjusting ring axial movement of the two lid parts against each other or away from each other is effected, so that connected to these cover parts electrical connector or coupling parts automatically connected or be separated from each other. When removing the lamp so the circuit is automatically interrupted when the lid is opened and removed.

To connect the lamp, the bulb holder with the lamp and the other electrical components within the tube remain, since the electrical connection is made by pressing the two-piece lid. Rotary movements of the inner cover part upon rotation of the adjusting ring, which could be transmitted to the bulb holder, do not take place.

Other design measures for mounting coupling part and plug part are given with the claims 2 to 5.

The embodiment of the clampable sealing ring is the subject matter of claims 6 and 7.

Measures for converting the rotational movement of the adjusting ring in an axial movement of the inner cover part and for ease of assembly are characterized by the claims 8 to 11 and 14.

The proposals according to claims 12 and 13 serve to protect the lamp tube when inserting the lid.

Claim 15 finally refers to the realizable in the cover according to the invention cable bushing, while with claim 16, a more easily actuated for the invention protective tube light in the event of contamination adjustable collar is proposed.

Figur 1

eine perspektivische Darstellung des erfindungsgemäß ausgebildeten Deckels mit Lampe und Lampenträger,

Figur 2

eine perspektivische Darstellung des Deckels gemäß Figur 1 ohne Lampe und Lampenträger,

Figur 3

Längsschnitt der Anordnung gemäß Figur 1, jedoch mit abgebrochen dargestelltem Leuchtenrohr,

Figur 4

perspektivische Explosionsdarstellung der Elemente des erfindungsgemäßen Deckels mit angedeutetem Leuchtenrohr,

Figur 5

Schnitt längs der Linie V-V in Figur 8 bei geöffnetem Stecker,

Figur 6

Schnitt entsprechend Figur 5 bei geschlossenem Stecker,

Figur 7

Stirnansicht der Anordnung gemäß Figur 6 in Richtung VII gesehen,

Figur 8

Rückansicht der Anordnung gemäß Figur 6 in Richtung VIII gesehen,

Figur 9

teilweise geschnittene Seitenansicht des erfindungsgemäßen Deckels in der Position gemäß Figur 6,

Figur 10

Schnitt längs der Linie X-X in Figur 9 und

Figur 11

vergrößerte Detailansicht XI aus Figur 10.

Incidentally, all the claimed features are shown in the drawing and explained below with reference to a preferred embodiment of a protective tube light in detail. In the drawings show

FIG. 1

a perspective view of the inventively designed lid with lamp and bulb holder,

FIG. 2

a perspective view of the lid according to FIG. 1 without lamp and bulb holder,

FIG. 3

Longitudinal section of the arrangement according to FIG. 1 , but with broken tube shown,

FIG. 4

perspective exploded view of the elements of the lid according to the invention with indicated light tube,

FIG. 5

Section along the line VV in FIG. 8 with the plug open,

FIG. 6

Cut accordingly FIG. 5 with the plug closed,

FIG. 7

End view of the arrangement according to FIG. 6 seen in direction VII,

FIG. 8

Rear view of the arrangement according to FIG. 6 seen in the direction of VIII,

FIG. 9

partially sectioned side view of the lid according to the invention in the position according to FIG. 6 .

FIG. 10

Section along the line XX in FIG. 9 and

FIG. 11

enlarged detail view XI off FIG. 10 ,

With the FIGS. 1 to 3 are the essential elements of the inventively designed protective tube light illustrated in the assembled state.

FIG. 1 lets the lid with lid outer part 60, sealing ring 62, collar 70 and connector part holder 20 recognize. This cover is intended in the in FIG. 1 not shown, but in FIG. 3 partially shown transparent light tube 10 is used. In the plug receptacle 21 of the plug part holder 20 is in FIG. 2 recognizable plug member 30 is inserted, which is electrically and mechanically connected to the socket 12. In the version 12, the fluorescent lamp 13, here a single-capped fluorescent lamp, with its base 14 is inserted. The version 12 and possibly other necessary for the operation of the fluorescent lamp components, eg. As ballasts, starters and the like, are mounted on the likewise arranged within the transparent lamp tube 10 bulb holder 11.

Openings 22 in the plug part holder 20 allow access to the locking means for the plug 30 and the bulb holder 11th

For the power cord, not shown, an attached to the inside of the lid 80 cable gland 90 is provided, from which in FIGS. 1 and 2 only the union nut 91 can be seen.

For the closure of the other end of the lamp tube, not shown, an identical lid construction is provided. With one-sided cable feed can of course be dispensed with the cable feedthrough.

While FIG. 3 shows the protective tube light in the assembled state, however, for the purpose of illustration, the socket 12 is shown offset with the fluorescent lamp 13 to the right, shows FIG. 4 the items of the inserted into the lamp tube 10 lid in detail.

20

Steckerteilhalter mit der angespritzten Steckerteilaufnahme 21,

30

Steckerteil, das in die Steckerteilaufnahme 21 einschiebbar und in dieser verrastbar ist. Das Steckerteil 30 ist auf seiner rechten Seite mit Kontakten 31 zum Anschluss an die Lampenfassung 12 versehen, wie dies im Einzelnen aus Figur 1 und 2 hervorgeht. Auf der linken Seite besitzt das Steckerteil 30 axial gerichtete Steckerkontakte 32.

40

Kupplungsteil mit den Steckerkontakten 32 zugeordneten Kupplungskontakten 41. Auf der gegenüberliegenden Seite befinden sich im Einzelnen nicht dargestellte Klemmkontakte zum Anschluss des gleichfalls nicht dargestellten Netzkabels.

50

Kupplungsteilhalter, in dessen Ausnehmung das Kupplungsteil 40 einsetzbar ist. Gehalten wird das Kupplungsteil 40 mit dieses umfassenden Federzungen 53. Auf der linken Seite besitzt das Kupplungsteil 50 einen Rastkragen 51 zur Positionierung des Kupplungsteils 40. Die Rastzungen 52 dienen der Verbindung mit dem Deckelinnenteil 80, wobei sie in dessen Rastöffnungen 82 eingreifen.

60

Deckelaußenteil, dessen Zylinderring 66 im eingebauten Zustand innerhalb des Leuchtenrohres 10 gelegen ist und den aus gummielastischem Material bestehenden Dichtring 62 trägt. Sein Betätigungsring 67 befindet sich in eingebautem Zustand außerhalb des Leuchtenrohres 10.

80

Deckelinnenteil, das bestimmungsgemäß in das Außendeckelteil 60 einsetzbar ist. Auf der rechten Seite weist es einen Spannkonus 83 auf, während auf der linken Seite das Gewindeteil 81 vorgesehen ist.

70

Stellring, der auf das Gewindeteil 81 des Innenteils 80 aufschraubbar ist. Er ist mittels des Innenringes 74 mit dem Betätigungsring 67 des Deckelaußenteiles axial fest, aber verdrehbar verbindbar. Hierbei greifen Nasen 64 des Deckelaußenteils 60 in seine Ringnut 72 ein. Montagezungen 75, welche den Nasen 64 des Deckelaußenteils zugeordnet sind, ermöglichen das Einschnappen des Innenrings 74 in den Betätigungsring 67 des Deckelaußenteils 60.

90

Kabeldurchführung mit Überwurfmutter 91, Gewinderohr 93 und Feststellmutter 92. Das Verbindungsstück 94 ist in zusammengebautem Zustand in die zylindrische Ausnehmung 81a des Deckelinnenteils 80 eingesetzt und mit diesem verschraubt oder verklebt.

Specifically, these are the following elements seen from right to left:

20

Plug part holder with the molded plug part receptacle 21,

30

Plug part which can be inserted into the plug part receptacle 21 and locked in this. The plug part 30 is provided on its right side with contacts 31 for connection to the lamp holder 12, as in detail FIGS. 1 and 2 evident. On the left side, the plug part 30 has axially directed plug contacts 32.

40

Coupling part with the plug contacts 32 associated coupling contacts 41. On the opposite side are not shown in detail terminal contacts for connecting the power cord, also not shown.

50

Coupling part holder, in the recess, the coupling part 40 is used. On the left side, the coupling part 50 has a detent collar 51 for positioning the coupling part 40. The detent tongues 52 serve to connect to the inner cover part 80, wherein they engage in its detent openings 82.

60

Lid outer part, the cylinder ring 66 is located in the installed state within the lamp tube 10 and carries the existing rubber-elastic material sealing ring 62. Its actuating ring 67 is in the installed state outside of the lamp tube 10th

80

Lid inner part, which is intended to be used in the outer cover part 60. On the right side, it has a clamping cone 83, while on the left side, the threaded portion 81 is provided.

70

Adjusting ring which can be screwed onto the threaded part 81 of the inner part 80. It is axially fixed by means of the inner ring 74 with the actuating ring 67 of the lid outer part, but rotatably connected. In this case, lugs 64 of the lid outer part 60 engage in its annular groove 72. Mounting tongues 75, which are associated with the lugs 64 of the outer cover part, allow the inner ring 74 to snap into the actuating ring 67 of the outer cover part 60.

90

Cable bushing with union nut 91, threaded tube 93 and locking nut 92. The connector 94 is inserted in the assembled state in the cylindrical recess 81 a of the inner cover part 80 and screwed or glued thereto.

The essential for the invention training and operation of the electrical connection with the plug part 30 and the coupling part 40 are based on FIGS. 5 and 6 explained in detail below. While FIG. 5 shows the plug with plug part 30 and coupling part 40 in the open state, goes out FIG. 6 the plug in the closed state.

The electrically connected to the fluorescent lamp 13 plug part 30 is inserted into the receptacle 21 of the plug-part holder 20, wherein locking lugs 23 and 24 define the plug in its position.

Associated with the plug is the coupling part 40, which is secured in a recess 54 of the coupling part holder and with this with spring tongues 53 against axial displacement. The plug part holder 50 is connected to the cover inner part 80 in the axial direction and rotationally fixed, wherein the in FIG. 4 engages more closely represented locking tongues 52 of the coupling part holder 50 in the latching openings 82 of the inner cover part 80. Thus, an axial displacement of the inner cover member 80 causes the axial advancement or retraction of the coupling member 40 with respect to the male member 30, whereby the coupling contacts 41 of the coupling member 40 with the contacts 32 of the male member 30 are engaged or disengaged.

The axial feed of the cover inner part 80 is the threaded portion 81, with which the rotatable collar 70 with its cam 71 is engaged. Thus, by turning the adjusting ring 70, the cover inner part 80 with the coupling part 40 of the in FIG. 5 represented uncoupled position in the in FIG. 6 shown coupled position to be advanced, wherein the plug holder 20 with the plug part 30 and the in the FIGS. 5 and 6 not shown bulb holder remain immovable. Guide grooves 63 in the interior of the lid outer part 60, in which cams 84 of the inner lid part 80 are guided, prevent rotation of the lid parts against each other. Thus, the electrical contact is made to the fluorescent lamp. By rotating the adjusting ring 70 in the opposite direction of the electrical contact is interrupted.

The adjusting ring 70 is held captive but rotatable by means of the lid outer part 60 provided, inwardly directed and engaging in the annular groove 72 lugs 64.

The outer cover part 60 is provided at its front end with a sealing ring 62, on the inner cone 65 of the clamping cone 83 of the inner lid portion 80 is applied. Consequently, not only the coupling part 40 is advanced during the axial inward movement of the cover inner part 80, but also at the same time pressed against the inner wall of the light tube 10 under the action of the adjacent cones 83 and 65 of the sealing ring 62. This design allows a relatively large expansion of the sealing ring 62, so that a secure seal is ensured even with comparatively large tolerances of the lamp tube.

The inventive construction of the lid thus offers two advantages, namely the interruption of the electrical contact between the power cord and the fluorescent lamp, as well a simple and secure sealing of the lid with respect to the lamp tube with simultaneous contact.

The grommet 90 with its screwed onto the threaded tube 93 union nut 91 is conventional in nature and requires no further explanation. The threaded tube 93 is screwed or glued by means of a connecting piece 94 in a corresponding recess 81 a of the inner lid part 80. A provided on the cover-side end locking nut 92 allows for screwed threaded pipe assembly and disassembly by means of a simple open-end wrench.

On the front side, the collar 70 distributed over the circumference blind holes 73, which serve to receive a pin wrench or the like tool to operate better with this collar 70, if it should be resinified or dirty after prolonged use.

Another special feature of the adjusting ring 70 is based on FIGS. 9 to 11 explained.

In order to avoid damage to the lamp tube, the feed of the cover inner part 80 should be recognizably limited in the direction of the light tube for the user recognizable.

This purpose is provided by a locking cam 86 and the spring tongue 87 on the threaded portion 81 of the inner cover part 80 latching. In this rest, the cam 71 of the adjusting ring 70 in the end position of the closed lid. The locking cam 86 is dimensioned so that it can be passed clearly visible by the radially evasive cam 71 upon rotation of the adjusting ring 70 for the user. The further rotational movement of the adjusting ring 70 is limited by a radial resilient tongue 87 in the bottom of the thread. Also, this tongue can be run over on further rotation of the adjusting ring 70, whereby the cam 71 reach into the region of these corresponding openings 89 in the inner lid part 80. This makes it possible to deduct the adjusting ring 70 for disassembly over the outer wall 88 of the inner lid part 80.

LIST OF REFERENCE NUMBERS

10

glow tube

11

bulb holder

12

version

13

Fluorescent Lamp

14

lamp base

20

Male connector holder

21

plug receptacle

22

breakthroughs

23

locking lugs

30

plug part

31

terminals

32

plug contacts

40

coupling part

41

Female contacts

42

displacement contacts

50

Coupling part holder

51

Rest collar

52

locking tongues

53

spring tongues

54

recess

60

Cover outer part

61

inner cylinder disc

62

seal

63

guide

64

nose

65

inner cone

66

cylinder ring

67

actuating ring

70

collar

71

cam

72

ring groove

73

blind

74

inner ring

75

mounting tab

80

Cover insert

81

threaded part

81a

cylindrical recess

82

latching openings

83

Spannkonus

84

cam

85

thread

86

locking cams

87

spring tongue

88

outer wall

89

breakthroughs

90

Grommet

91

Nut

92

Locknut

93

threaded pipe

94

joint

Claims (16)

1. Safety lamp with cover consisting of several parts (60, 70, 80), including a transparent light tube (10), a lamp (13) arranged in this, a lamp support (11) supporting the lamp (13) with its mountings (12), wherein the cover consisting of several parts (60, 70, 80) tightly encloses the light tube (10) at both ends and includes an outer cover part (60), inserted into the light tube (10), an inner cover part (80) engaging into the outer cover part (60), with a threaded piece (81) and an adjusting ring (70) placed over the threaded piece (81) with cams (71) engaging into the threaded piece (81), wherein as the result of axial displacement of the inner cover part (80) relative to the outer cover part (60) a sealing ring (62) by means of a clamping cone (83) is subject to widening and pressure against the inner wall of the light tube (10) and wherein an electrical connection lead passes through one of the two cover parts (60, 70, 80) and inside the light tube (10) is electrically connected to a coupling part (40), to which is assigned a plug part (30) electrically connected to the mounting (12) of the lamp (13), characterized in that the coupling part (40) is solidly connected to the inner cover part (80) and the plug part (30) is solidly connected to the lamp support (11) and the contacts between coupling part (40) and plug part (30) run in the axial direction of the light tube (10) and are positioned in a collinear fashion such that the plug part (30) and coupling part (40) can be connected and disconnected by rotating the adjusting ring (70).
2. Safety lamp according to claim 1, characterized in that the coupling part (40) locks in rotationally secure but detachable fashion with the inner cover part (80) through a coupling part holder (50) while the plug part (30) locks in rotationally secure but detachable fashion with the lamp support (11) via a plug part holder (20).
3. Safety lamp according to claim 2, characterized in that the locking collar (51) of the coupling part holder (50) projects into the inner cover part (80) and with the radially-elastic locking tabs (52) of the coupling part holder engages with the corresponding click-in holes (82) in the inner cover part (80).
4. Safety lamp according to claim 2 or 3, characterized in that the coupling part holder (50) has a recess (54) to receive the coupling part (40) and elastic tabs (53) arranged diametrically to each other, which encompass the coupling part (40) on both sides.
5. Safety lamp according to claim 2, characterized in that the plug part (30) is located in the plug socket (21) and is firmly but detachably connected thereto by means of locking elements.
6. Safety lamp according to anyone of the above claims, characterized in that the outer cover part (60) on its side projecting into the light tube (10) has a sealing ring (62) made of rubber-elastic material with an interior cone (65), in which a clamping cone (83) formed on the inner cover part (80) engages.
7. Safety lamp according to claim 6, characterized in that the sealing ring (62) is extruded onto the outer cover part (60) made of plastic.
8. Safety lamp according to anyone of the above claims, characterized in that axially running guide grooves (63), in which cams (84), corresponding thereto, of the inner cover part (80) engage, are formed inside the outer cover part (60).
9. Safety lamp according to claim 8, characterized in that the adjusting ring (70) is connected in axially solid fashion to but can rotate relative to the outer cover part (60).
10. Safety lamp according to claim 9, characterized in that the adjusting ring (70) has an inner ring (74), rotatably mounted within the outer cover part (60), with the outer cover part (60) having projections (64), which project radially inwards to engage the circular groove of the adjusting ring.
11. Safety lamp according to claim 10, characterized in that assembly tabs (75), which facilitate the assembly and correspond to the projections (64) of the outer cover part (60), are formed on the inner ring (74) of the adjusting ring (70).
12. Safety lamp according to claim 1, characterized in that the threaded piece (81) of the inner cover part (80) has a thread (85) with at least one catch (86, 87) formed on the end situated outside, into which in the closed position of the cover (60, 70, 80) the cam (71) of the adjusting ring (70) the engages.
13. Safety lamp according to claim 12, characterized in that the catch is formed by a radially protruding locking cam (86) arranged at the base of the thread (85) of the theaded part (81) and elastic tabs (87), which can swing out radially in the rotational direction of the adjusting ring (70).
14. Safety lamp according to claim 1, 12 or 13, characterized in that the external wall (88) of the inner cover part (80) has openings (89) corresponding to the cams (71) of the adjusting ring (70).
15. Safety lamp according to anyone of the above claims, characterized in that a cable entry with a threaded tube (93), a union nut (91) screwed thereon and a locking nut (92) is connected to the inner cover part (80).
16. Safety lamp according to anyone of the above claims, characterized in that the adjusting ring (70), for inserting a wrench, has blind holes (73), which are distributed over its periphery and accessible from the outside.

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