WO2012069204A1

WO2012069204A1 - Tube head connection design for a fluorescent lamp with a retrofit from t8 tubes to t5 tubes

Info

Publication number: WO2012069204A1
Application number: PCT/EP2011/005940
Authority: WO
Inventors: Hui Zhu
Original assignee: Li, Riming; Romano-Scotti, Eugenio
Priority date: 2010-11-25
Filing date: 2011-11-25
Publication date: 2012-05-31

Abstract

The invention relates to a tube head connection design for a fluorescent lamp for retrofitting from T8 tubes to T5 tubes, consisting of an end covering (1) that comprises the following: a rear covering (5) with a thread (5'); a movable plate (4) that is provided with lamp bases; and a central housing part (7) that is designed to receive electronic components of an electronic ballast for fluorescent lamps, said central housing part (7) having a first thread (7'') and a second thread (7').

Description

description

Tubular head connection construction for fluorescent lamp with

Conversion from T8 to T5 ro

State of the art

Current tubular head connection constructions for

T8- to T5-tube fluorescent lamps consist of tube chuck, back cover and clear tube, the tube chuck being a two-step round tube, one relatively large diameter stage attached to one end of the clear tube by gluing, and one Stage with relatively small diameter and separably connected to the rear cover. In the interior of the rear cover electronic components of the electronic ballast are provided. The two T8 lamp feet are made out of the plate of the other end of the rear cover to the outside. The above-designated

Tubular head connection construction has the following defects:

(1) When converting to the T5 tube, the electronic component of the electronic ballast is exposed, so that there is a risk of electric shock to the user due to the current-carrying capacitor.

(2) Because a movable connector is provided between the tube chuck and the rear cover, a loosening between the rear cover and the tube chuck may occur during transportation or use in a suspended manner

signifies a considerable accident risk.

Object of the invention

The object of the present invention is therefore to provide a tube head connection construction for the Conversion of a fluorescent lamp from T8 to T5 tubes, whereby the disadvantages of the prior art should be eliminated. Thus, in particular, a reliable connection between tube lining and rear cover is guaranteed and occurs neither during transport nor when using a relaxation, so that when replacing the T5 tube no risk of accident

for example, by electric shock.

These tasks and other of the following description to be taken tasks are from a

RöhrenkopfVerbindungskonstruktion solved according to claim 1.

Further advantageous embodiments of the invention are specified in the subclaims.

Compared to the prior art, the present

Invention the following advantages:

(1) The tube head connecting structure of the present invention for fluorescent lamps with conversion from T8 to T5 tubes is identical for the tube heads of both ends. The two tube liners are each attached to the two ends of the transparent tube. After the operative thread connection of the rear cover and tube lining, the rear cover is attached to the tube lining. The connecting structure causes the tube heads of both ends of the

Tubular head connection design for fluorescent lamps with conversion from T8 to T5 tubes are not loosened during transport or use and are safe and reliable.

(2) Because the electronic components of electronic

Ballast in a closed space (namely, the middle tube housing) are provided, carried out in case of damage required replacement of the T5 tube no

Contact between the personnel and the live end of the capacitor of the ballast, so that there is no risk of accidents. (3) On the edge of a movable plate, four projections may be provided at an angle of preferably 90 ° spaced from each other, with a projection on the edge of a central plate

Housing part four grooves are provided at an angle of 90 ° spaced from each other. The four grooves and the four projections can be connected by clamps. at

immovable light-reflecting holder can by

Adjusting the clamping position in a convenient way

Center cables of the two in T8 lamp feet are arranged horizontally or vertically to meet the mounting requirements of wall or ceiling.

Explanation of the illustrations:

Figure 1 shows the tube head connection construction for fluorescent lamps with conversion from T8 to T5 tubes according to the practical embodiment of the present invention.

Figure 2 shows the tube head connection structure for fluorescent lamps with conversion from T8 to T5 tubes according to the practical embodiment of the present invention, wherein the electrical contacts are shown.

Practical embodiment:

The following is based on the practical

Embodiment further description of the present invention.

As can be seen from FIGS. 1 and 2, there is one

Tube head connection construction for fluorescent lamps with conversion from T8 to T5 tubes from one end cover. In this case, a first end cover is shown in Figure 1, which is shown at the right end of Figure 1 in an assembled state and designated by reference numeral 1, and a second

End cover, which is shown exploded pulled apart at the left end of Figure 1. The end caps are provided with a fluorescent tube unit 2 (preferably a

Energy-saving fluorescent tube unit) with a light-reflecting holder 8, a transparent tubular housing 9 and a fluorescent tube electrically and mechanically connected.

Each end cover has a back cover 5, a

Tube lining 6, an outer tube lining 3 (or

Tubular chuck housing) with a larger diameter than the tube chuck 6, a movable plate 4 and a middle one

Housing part 7 on.

The tube chuck 6 is fastened to the end face of the fluorescent tube unit 2 by means of screws or the like, not shown, and thus also fixes the outer tube chuck 3 on the front side of the fluorescent tube unit 2. For the purpose of fixation, the outer tube chuck 3 may be provided with an inner tube

End flange to be clamped between the tube liner 6 and the end face of the fluorescent tube unit 2, wherein the diameter of the inner end flange of the tube liner 6 is sized so as not to block the passage of the screws from the tube liner 6 to the front side of the fluorescent tube unit 2.

The electronic components of the electronic

Ballast are in the middle housing part. 7

added. The middle housing part 7 is provided at the respective ends with external threads to communicate with respective

Internal threads on the rear cover 5 and on the

Tube chuck housing 3 to be screwed together. As can be seen in FIG. 1, the respective external threads of the middle housing part 7 are denoted by 7 'and 7' 'and the respective internal threads of the rear cover 5 and of the

Tubular chuck housing 3 with 5 'and 3'.

The movable plate 4, which is clamped between the rear cover 5 and the central housing part 7, has a

Variety of projections 4 'on. These projections 4 'are preferably four in number and at an angle of 90 ° on Edge of the movable plate 4 is arranged. At the movable plate 4 opposite end face of the middle

Housing part 7 are corresponding grooves 7 '' ', in which the movable plate 4, when clamped between the rear cover 5 and the central housing part 7, with the projections 4' in different angular positions can be positioned. Thus, the electrical contacts (lamp feet) of the movable plate 4 can be mounted in different angular orientations.

For mounting the tubular head connection construction, it is preferred to assume a state shown in FIG. 2, in which the electrical connections 11 between the

Fluorescent tube unit 2, the (not shown)

Ballast of the middle housing part 7 and the electrical contacts (lamp feet) of the movable plate 4 already

available. In this case, the tube chuck 6 is screwed, for example, to the front side of the fluorescent tube unit 2 and at the same time the tube chuck housing 3 is fixed by clamping. Subsequently, the middle housing part 7 is screwed with the external thread 7 'on the internal thread 3' of the tube chuck housing 3 and the rear cover 5 with the internal thread 5 'on the external thread 7 ^{1 1 of} the tube chuck housing. 7

screwed. During the latter process, it is possible for the projections 'of the movable plate 4 in the groove 7' '' of the central housing part with a variable

Angle alignment to position.

Thus, the tube head connection construction for the

Conversion of a fluorescent lamp from T8 to T5 tubes

realized. After the plug connection between the electronic components of the electronic ballast, the T5 lamp base and the T8 lamp base, a fluorescent lamp for conversion from T8 tube to T5 tubes is realized.

Claims

claims

1. Tubular head connection construction for a

Fluorescent lamp for conversion from T8 to T5 tubes consisting of an end cover (1) comprising:

a rear cover (5) with a thread (5 ');

a movable plate (4) provided with lamp feet;

a middle housing part (7), which is designed for receiving electronic components of an electronic ballast for fluorescent lamps, wherein the middle

Housing part (7) a first thread (7 '') and a second thread (7 ') identifies, wherein the first thread (7' ') of the middle

Housing part (7) is formed to cooperate with the thread (5 ') of the rear cover (5) to the middle

Housing part (7) with the rear cover (5) axially towards

connecting, wherein the middle housing part (7) and the rear cover (5) are formed to clamp in the connected state, the movable plate (4) therebetween in such a way that the lamp feet from the rear cover (5) axially away

stretch;

a tubular lining (6), with the front side of a

Fluorescent tube unit (2) is axially connectable; and

a tube chuck housing (3) having a larger diameter than the tube chuck (6), which is designed to connect the tubular chuck (6) and the end face of the fluorescent tube unit (3) during the axial connection of the tube chuck (6) to the front side of the fluorescent tube unit (2). 2), wherein the tube chuck housing (3) is formed with a thread (3 '), wherein the thread (3') of the tube chuck housing (3) is adapted to engage with the second thread (7 ¹ ) of the

middle housing part (7) cooperate to the central housing part (7) with the tubular chuck housing (3) axially to

connect .

2. The tube head connection structure according to claim 1, wherein the first thread (7 '') and the second thread (7 ') of the middle housing part (7) are designed as external threads and the respective threads (3 ¹ , 5 ') of the tubular chuck housing

(3) or the rear cover (5) as internal threads

are formed.

A tubular head connection structure according to claim 1 or 2, wherein the movable plate (4) and the movable one

Plate (4) facing the end face of the central housing part (7) are provided with respective means to allow a variable positioning of the movable plate (4) on the front side of the central housing part (7).

4. tube head connection construction according to claim 3, wherein the means as projections (4 ') on the movable plate

(4) or grooves (7 '' ') on the middle housing part (7)

are formed, and preferably wherein the projections (4 ') and the grooves (7 ^{1 1 1} ) at the edge of the movable plate (4) or the end face of the central housing part (7) are at an angle of 90 ° to each other.

5. tube head connection construction according to one of the several claims 1 to 4, the electrical connections

(11) between the fluorescent tube unit (2), the

Ballast of the middle housing part (7) and the

Includes lamp feet of the movable plate (4).

A tubular head joint structure according to any one of claims 1 to 5, wherein the tubular liner (6) is fixed to the end face of the fluorescent tube unit (2) by means of axially extending screws or the like.

7. Fluorescent tube unit (2) with at least one

Tubular head connection construction according to one of the several claims 1 to 6.