EP1085257B1 - Lighting projector with locking of the knuckle - Google Patents

Abstract

The flood lamp unit has a lamp housing (20) attached to a stationary support via a carrier (10), relative to which it is pivoted for altering the angle of the flood lamp beam, with a stop mechanism, with complementary interlocking elements, used for locking it in the required angular position. A safety device, holding the interlocking elements in engagement, must be released before the lamp housing can be pivoted relative to the carrier.

Description

The invention relates to a lighting headlamp with anti-rotation for use as indoor or outdoor lamp, in particular for illuminating large areas, e.g. for lighting sports fields, building facades, industrial plants, industrial halls or sports halls, in particular floodlights and spotlights.

Such lighting headlights, hereinafter also referred to as "headlights" are used for example in sports halls, where they are mounted above the sports area on brackets and radiate down light. These lighting headlights sometimes have considerable dimensions and a considerable weight. In general, these lights are suspended asymmetrically, so that the force acting on the suspension forces due to the large lever, which forms the free end, sometimes considerable. Since these headlights are usually difficult to access, this already requires an effective rotation of the headlight in the holder. In addition, for headlights that are used in sports facilities, a so-called ball throw safety, as defined for example in the standard of VDE No. 0710, is required, which means that the headlight does not adjust when impacting balls to a certain force may. This makes special demands on the rotation between headlight housing and bracket.

However, corresponding problems or requirements also arise in other areas of application. For example, in the case of headlamps used on ski slopes, snowmaking and icing can result in considerable additional weight, which can lead to considerable leverage on the pivotal connection between the headlamp housing and light are acting. The wind load can sometimes be even stronger and be amplified by wind gusts and vibrations caused by them. Again, there is a need for a reliable anti-rotation.

So far, the headlight housing has been frictionally fixed in such headlights, for example, by a clamping nut which presses the holder of the headlight housing and the headlight housing against each other. This type of fuse has the disadvantage that over time and with continued load, such as wind or repeated Ballaufschläge, the fuse can loosen, so that the headlight housing and the bracket can move against each other, and therefore considerable forces must be expended, to achieve a reliable backup. Therefore, additional security measures are usually provided to maintain the fixation, e.g. an interposed sprocket or the like.

The need to tighten the screws to produce the necessary clamping pressure very firmly in order to achieve a sufficient assurance, as well as the mentioned additional security measures increase the workload during assembly or when readjusting the conventional headlights. The housings used in the headlight construction are often at least in the field of attachment made of die-cast aluminum and are abraded by the additional security measures, for example by a toothed wheel. A constant heavy load on the screw by leverage can cause the screw loosens by material removal, tightened the screws and the headlights may need to be readjusted.

Basically positive locking anti-rotation in the form of locking prongs are known and are used for example in the household sector for small parts that are not subject to high loads. For the headlights in question, however, such backups have not been used so far, probably because of the high weight of the headlights, their large dimensions and the associated large leverage forces.

The generic US 4 143 413 discloses a luminaire mounting device for mounting a lamp on a mast. The fastening device is pivotable and comprises a light-side and a mastseitiges casting, which are rotatably supported by a screw on each other. To block the rotational movement after adjusting the lamp, interlocking grooves are respectively provided on the light side and mast side element. Similar devices are disclosed in US 4 543 007 and US 4 379 321, in which interdigitated teeth are provided on a light-side and a bracket-side hinge member for blocking the rotational movement after the lamp has been adjusted.

It is the object of the invention to provide a headlight available, which has a high Verstellfestigkeit, easy to assemble and whose light emission is easily adjustable.

This object is achieved by a lighting headlamp according to claim 1.

One embodiment comprises a headlight, in particular floodlight headlight, with a holder for attachment to a stationary carrier, a headlight housing which is pivotally connected to the holder, and a locking device for fixing the headlight housing in a position pivoted relative to the holder, which is characterized that the locking device associated with the headlight housing interlocking elements and complementary thereto, the holder associated positive locking elements which can be engaged with each other and prevent pivoting of the headlight housing relative to the holder when they are engaged, and which can be detached from each other, so that the headlamp housing can be pivoted relative to the holder.

According to the invention, a securing device can be provided, which holds in a securing state, the headlight housing and the holder associated positive locking elements in engagement with each other, so that the headlight housing and the holder are secured against rotation, and which allows in a dissolved state pivoting of the headlight housing relative to the holder ,

In particular, it can be provided that the securing device exerts a clamping pressure on the interlocking elements in the securing state, so that they are held in a positive engagement.

The securing device can be, for example, a tensioning clamp, a tensioning clamp, a tensioning spring or the like. In particular, the pivotal connection between the headlight housing and the holder may comprise a pivot pin, which is provided with a clamping head, which can be displaced by means of a screw thread and compresses by a corresponding displacement, the holder and the headlight housing and thus the positive locking elements associated therewith. The clamping head may be, for example, a nut which is screwed onto a threaded end of the pivot pin. It However, it may also be the head of a screw which forms the pivot pin or a part thereof and which is screwed into a provided in the headlight housing or the holder screw thread.

It may further be provided that the interlocking elements are resiliently biased against each other against the direction of the clamping pressure of the securing device.

In particular, it may be provided that the holder has retaining arms, e.g. in the form of a two-armed retaining bracket, which engage on opposite sides of the lamp housing. Preferably, these support arms are biased away from the headlamp housing.

According to a particular embodiment, the form-fitting elements associated with the headlight housing or the holder are integrally formed on these, for example by casting the entire part.

According to one embodiment of the invention, the form-locking elements associated with the holder and / or the form-locking elements of the locking device assigned to the spotlight housing are formed in a locking element mounted secured against rotation relative to the housing or the holder.

It can be provided in particular that the headlight housing and the holder are connected to each other via a pivot pin. It is provided according to an embodiment that the holder and at least one locking element are arranged on the pivot pin.

According to a particular embodiment, the form-locking elements associated with the holder are formed in a separate locking element, while the form-fitting elements associated with the housing are formed integrally with the housing. Basically, however, the headlight housing to be assigned a separate locking element, while the corresponding positive locking elements, which are associated with the holder, in one piece with the holder, for example by casting, molding or the like., Are formed. Finally, it is also possible that both the housing and the holder is associated with a respective separate locking element.

According to a development, the locking element is characterized by a form-fitting securing against its associated element, i. the housing or the holder, secured against rotation.

It can be provided that the holder associated with the locking element is arranged on the pivot pin in the direction away from the headlight housing after the holder and engages over the bracket at the end of the outside.

The arranged on the pivot pin elements can be braced against each other by a nut screwed.

The invention provides in particular that the headlight housing and the holder can be adjusted against each other quasi-continuously, ie in small discrete steps.

According to a preferred embodiment, in the locking device, the headlight housing or the holder are each assigned in a row arranged positive locking elements, which are preferably identical and at regular intervals, in particular directly adjacent to each other, are arranged. These rows of form-locking elements are formed complementary to each other. The fact that always several, usually relatively many interlocking elements, interlock in the locked state, a particularly good backup is achieved.

In particular, it can be provided that the headlight housing or the holder associated rows of interlocking elements can move relative to the holder at least for a portion of the possible pivot angle against each other during rotation of the headlight housing without losing the mutual coverage, so that they are substantially can be engaged with each other quasi-continuously.

According to a presently preferred embodiment it can be provided that the headlight housing and the holder against each other in angular increments of 10 ° or less, preferably less than 7 ° and particularly preferably in angular increments of 5 ° are mutually pivotable and lockable in the corresponding position.

It can also be provided that the headlight housing and the holder can be adjusted relative to each other in angular increments, which can assume a value of 10 °, 15 °, 30 °, 45 ° or 90 ° or more of these values.

When the interlocking elements are designed to rotate with the housing or the holder during a pivoting, it is preferred that said interlocking elements are arranged in the form of a circle or a circular portion which is concentric with the pivot axis. In principle, however, the interlocking elements can also be formed in linearly displaceable elements, to which the pivotal movement of the housing or the holder is transmitted.

The invention may provide that the interlocking elements of the locking means have mutually complementary serrations, i. that the toothing of the one positive locking element can engage in that of the other positive locking element at least on a portion thereof.

It may also be provided that the interlocking elements have a complementary waveform.

This embodiment allows for easier sliding of the interlocking elements during clamping, e.g. through a clamping nut.

The interlocking elements or the parts carrying the interlocking elements, such as the locking elements, can be made of a highly resilient material, such as steel, but in particular also of less durable materials, such as aluminum die-cast or plastic. The latter materials have the advantage of a relatively low weight.

The invention finds advantageous application in headlamps in which the weight is between 2 kg and 60 kg, in particular between 4 kg and 30 kg and / or more than 10 kg, and / or where the headlight housing dimensions, such as length and / or Width or diameter, of more than 15 cm, in particular more than 40 cm, has. Headlights according to the invention may in particular have dimensions in the range of 60 cm to 1 m, but also have even larger dimensions.

The invention provides a secure anti-rotation especially when the headlamp housing is pivotally mounted at one end to the holder and having a said end opposite free end. This free end forms a lever arm, which can exert considerable forces on the pivot connection.

Fig. 1

zeigt eine schematische Darstellung einer beispielhaften Ausführungsform der Erfindung.

Fig. 2

zeigt die Ansicht in Blickrichtung A (Fig.1) der Ausführungsform in Fig. 1.

Fig. 3

zeigt eine Schnittansicht der Arretiereinrichtung und einem Ausschnitt des Leuchtengehäuses.

Fig. 4

zeigt eine vergrößerte, teilweise geschnittene Draufsicht auf die Arretiereinrichtung und das Leuchtengehäuse.

Fig. 5

zeigt eine Kappe für die Arretiereinrichtung gemäß der bevorzugten Ausführungsform der Erfindung.

Fig. 6

zeigt einen Ausschnitt des Leuchtengehäuses mit Haltestutzen.

Further features and advantages of the invention will become apparent from the following detailed description of an exemplary embodiment of the invention with reference to the accompanying drawings.

Fig. 1

shows a schematic representation of an exemplary embodiment of the invention.

Fig. 2

1 shows the view in viewing direction A (FIG. 1) of the embodiment in FIG. 1.

Fig. 3

shows a sectional view of the locking device and a section of the lamp housing.

Fig. 4

shows an enlarged, partially sectioned plan view of the locking device and the lamp housing.

Fig. 5

shows a cap for the locking device according to the preferred embodiment of the invention.

Fig. 6

shows a section of the lamp housing with holding stubs.

Fig. 1 shows a schematic representation of an exemplary embodiment of the invention. A luminaire housing 20 is held by a holder 10 by means of a locking device 50. This locking device 50 is detachable, so that the lamp housing 20 can be rotated against the holder 10 to pivot the light exit surface 27 against the horizontal.

As can be seen in Fig. 2, the holder 10 is formed as an approximately U-shaped bracket comprising two approximately equal length of support arms 11 with a rectangular cross-section. At their ends, the holding arms 11 are received in the locking device 50 and each provided with a screw hole (not shown). Screws 40 pass through the locking devices 50 and the screw openings of the retaining arms 11 into the luminaire housing 20, where they engage in fixed threads. These screws 40 cause the determination between the holder 10 and the lamp housing 20, which will be described below with reference to FIG. 3 in more detail.

As can be seen from FIG. 3, the locking device 50 comprises a retaining stub 21 and a cap 30. The retaining stub 21 is shown in detail in FIG. It is made integral with the luminaire housing 20, e.g. made of a single casting, and protrudes circular cylindrical out of the lamp housing 20. In its center is a perpendicular to the housing threaded opening 23 which is provided with a thread 25. The holding nozzle 21 has at the edge of the surface of its upper side an annular toothing 22, whose teeth extend approximately radially to the threaded opening 23.

On this holding piece 21, a cap 30 is placed, which is shown individually in Fig. 5. The edge 35 of the circular cap 30 is angled away from the cap base 31 in the direction of the lamp housing 20 and surrounds in the assembled state partially the holding nozzle 21. In its center, the cap 30 has a screw hole 39 which in the assembled state of Threaded opening 23 of the housing 20 is opposite. At one point, the edge 35 of the cap 30 has a recess 38 for receiving a holding arm 11. Opposite the recess 38 is a toothed half-ring 33 which is firmly integrated in the cap 30 and which adjoins the bent edge 35 on the inside and whose toothing points in the direction of the lamp housing 20 in the mounted state. The inner and outer radius of the half ring 33 are chosen so that its teeth in the assembled state of the annular toothing 22 of the holding nozzle 21 is for the most part opposite and can engage in this. The teeth of the half-ring 33 also extend, as those of the holding nozzle 21, approximately radially to the screw hole 39 and are in alignment and shape complementary to those of the holding nozzle 21 of the lamp housing 20. On the cap base 31 is located near the recess 38 in the edge 35 continues a pin 37 which projects in the direction of the edge 35 from the cap base 31.

From the sectional views of Figures 3 and 4 it can be seen how in this cap 30 of the support arm 11 is received. The cap 30 is placed on the respective end of the holding arm 11, that the holding arm 11 rests on the inside of the toothed half-ring 33 on the cap 30 through the recess 38 of the rim 35 with its rounded end (see FIG. 4). In this case, the openings 23, 39 are opposite. Thus, cap 30 and arm 11 do not rotate against each other, the pin 37 engages in a bore in the support arm 11 (not shown).

The screw 40 engages through the screw holes of the cap 30 and the retaining arm 11 in the threaded opening 23 of the holding nozzle 21. By tightening the screw 40, the opposing complementary serrations of the half-ring 33 and the teeth 22 of the holding nozzle 21 are pressed against each other. The teeth grasp each other and thus together with the screw 40 form a positive connection between the toothed half ring 33 of the cap 30 and the toothing 22 of the holding nozzle 21 of the housing 20. Since held by the screw 40 and the support arm 11 to the cap 30 and is secured by the pin 37 against rotation, formed by the positive engagement of the interlocking toothings a firm connection between the support arm 11 and the lamp housing 20. The formation of the complementary structures as toothing causes the teeth when tightening the screw 40 then slide into each other if the serrations are not offset in a complementary manner, but offset in the circumferential direction.

The half-ring 33 of the cap 30 has a height to be measured by the cap base 31, which is greater than the thickness of the holding arm 11, which rests on the inside of the cap base 31, so that engagement of the toothings of the cap 30 and the holding nozzle 21 not by the Holding arm 11 is prevented. For the same reason, the height of the rim 35 protruding beyond the half-ring 33 of the cap 30 must not be greater than the height of the holding nozzle 21 above the housing surface.

The holding arms 11 are each biased against the clamping pressure of the screws 40. By loosening the screws 40, the pressure on the locking means 50 is released, and the tension of the holding arms 11 causes the serrations of the cap 30 and holding stubs 21 are separated from each other. As a result, the positive engagement is canceled and solved the connection between the arm and the lamp housing. This facilitates the installation and adjustment of the headlight device.

To indicate the adjustment angle between the support arm 11 and the lamp housing 20, the cap 30 further comprises a pointer 32 (see Fig. 4), which points to an angular scale 22 which is mounted concentrically to the threaded opening 23 of the lamp housing 20. The angle scale 26 is scaled so that the angle at which the light exit opening 27 extends horizontally and points downwards is denoted by 0 ° and angles are displayed at a distance of 5 °. The markings of the scale preferably correspond to the angles or angular intervals in which housing and headlight can be adjusted or determined relative to one another.

In the described embodiment, the holding arm 11 and the associated form-locking element, the half-ring 33, are designed as two separate parts.

The locking device, in particular the interlocking elements, in view of the high potential loads due to weight forces or impacts preferably made of metallic material, suitably from a GußmateriaL However, they can also consist of other materials, for example, plastic, steel, etc ..

The weight of the light housing, which is held by the locking device is in many embodiments between 5 and 50 kg, in the case of the illustrated embodiment e.g. 21 kg. However, with the devices according to the invention, heavier headlamp housings, between 50 and 100 kg or more, can be securely held. Likewise, the then also large leverage forces can be absorbed even with large dimensions of the lamp housing, which act on the positive connection and the screw. Common luminaire housings are between 150 mm x 150 mm and 2000 mm x 2000 mm in dimensions, in the case of the illustrated embodiment e.g. at 600 mm x 750 mm. However, headlamp systems with larger dimensions can also be realized with the device according to the invention.

According to the exemplary embodiment, it is provided that the holder is located on both sides of the lamp housing in order to avoid excessive stress on the retaining screws. In the headlamp according to the invention, however, it is also possible to provide a one-sided eccentric holder, wherein a majority of the force acting in the pivoting direction of the headlamp, is not absorbed by the screw, but by the positive engagement of the locking device.

In particular, in smaller, manually easy to handle headlamp devices, it is also possible to replace the screw with a thumbscrew, so that the assembly and the adjustment of the headlamp device can be made without tools.

The embodiment of the invention shown provides that complementary formations are provided on the cap and retaining stubs as positive locking elements, which produce the positive engagement together with the screw. Instead of these serrations, however, other structures are used. Thus, for example, the interlocking structures can also be embodied as ribs or waves, provided that they behave complementary to one another in the sense of a form fit. However, the waveform or serrations have the advantage that the structures slide upon tightening of the screw 40 into each other, even if they are laterally offset from each other. In order to ensure a sufficient grip, it is advantageous that a sufficient amount of these positive locking elements is provided. At best, these structures, as in a toothing, adjacent to each other. By the If, for example, a certain size of these structures, eg the width of the serrations or the ribs, the minimum step size of the angle adjustment can be set.

In the example shown, the interlocking elements are designed concentrically around a pivot axis annular. This is particularly necessary if an approximately stepless or multi-stage locking is to be made possible. If, on the other hand, only a few different setting angles are to be available, it is sufficient to provide the interlocking elements between the holder and the luminaire housing only at the points where a positive connection is to be achieved.

LIST OF REFERENCE NUMBERS

10

bracket

11

holding arm

20

headlamp housing

21

holding stubs

22

annular toothing

23

threaded opening

25

thread

26

angle scale

27

Light opening

30

cap

31

cap base

32

pointer

33

toothed half ring

35

cap edge

37

pen

38

recess

39

screw opening

40

screw

50

locking

Claims (14)

1. Illuminating lamp, in particular floodlights or spotlights, having a holder (10) for fastening on a stationary carrier, a lamp housing (20) pivotably connected to the holder (10), and a locking device (22, 30, 33) for fixing the lamp housing (20) in several angular positions with respect to the holder,
   wherein the locking device has positively locking elements (22) which are assigned to the lamp housing, and, complementary thereto, positively locking elements (33) which are assigned to the holder, which positively locking elements can be brought into engagement with one another and, once they are in engagement with one another, prevent the lamp housing (20) from pivoting with respect to the holder (10),
   characterized in that the positively locking elements (33) of the locking device which are assigned to the holder, and/or the positively locking elements (22) of the locking device which are assigned to the lamp housing, are formed in a locking element (30), which is attached in a manner such that it is prevented from rotating with respect to the housing (20) and the holder (10) and is designed as a separate part.
2. Illuminating lamp according to Claim 1, characterized in that the positively locking elements of the locking device can be detached from one another so that the lamp housing (20) can be pivoted with respect to the holder (10).
3. Illuminating lamp according to Claim 1 or 2, characterized by a securing device (40) which, in a securing state, keeps the positively locking elements (22, 33) which are assigned to the lamp housing and the holder in engagement with one another, so that the lamp housing (20) and the holder (10) are secured against rotating, and which permits pivoting of the lamp housing (20) with respect to the holder (10) in a detached state.
4. Illuminating lamp according to one of Claims 1 to 3, characterized in that the securing device (40), in the securing state, exerts a clamping pressure on the positively locking elements (22, 33), so that they are held in positively locking engagement.
5. Illuminating lamp according to Claim 4, characterized in that the positively locking elements (22, 33) are elastically prestressed with respect to one another counter to the direction of the clamping pressure of the securing device (40).
6. Illuminating lamp according to Claim 5, characterized in that the lamp housing (20) and the holder (10) are connected to one another via a hinge pin, and the holder (10) and at least one locking element (30) are arranged on the hinge pin.
7. Illuminating lamp according to Claim 5 or 6, characterized in that the locking element (30) is secured against rotating with respect to the element (10) assigned to it with the aid of a positively locking securing means (37).
8. Illuminating lamp according to either of Claims 6 and 7, characterized in that the locking element (30) which is assigned to the holder is arranged on the hinge pin in the direction away from the lamp housing (20) after the holder (10) and engages over the holder (10) from outside in the direction of the lamp housing (20).
9. Illuminating lamp according to one of the preceding claims, characterized in that the lamp housing (20) and the holder (10) can pivot with respect to one another in angular steps of 10° or less and can be fixed in the corresponding positions.
10. Illuminating lamp according to one of Claims 1 to 9, characterized in that the positively locking elements of the locking device (22, 33) have mutually complementary sets of teeth.
11. Illuminating lamp according to one of Claims 1 to 9, characterized in that the positively locking elements have a complementary corrugated shape.
12. Illuminating lamp according to one of the preceding claims, characterized in that its weight is between 2 kg and 60 kg.
13. Illuminating lamp according to one of the preceding claims, characterized in that the lamp housing (20) has a length and/or width of more than 15 cm.
14. Illuminating lamp according to one of the preceding claims, characterized in that the lamp housing (20) is fastened on the holder (10) such that it can pivot asymmetrically.

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