EP1902248B1 - Lamp housing, particularly projector housing - Google Patents

Description

The invention relates to a lamp housing, in particular a headlight housing, according to the preamble of claim 1.

From the DE 198 16 364 C2 a lamp housing is known, which serves to receive a luminous body, a transparent cover in the form of a protective disk or a lens disc and a reflector. As filament burner or lamps, preferably single-ended discharge lamps, in a vertical or horizontal mounting position, that is, in each case perpendicular to the optical axis, or in the axial mounting position, that is, in the optical axis used.

The lamps have a gas-filled glass body with electrodes arranged therein, a lamp cap through which the supply lines are led to the electrodes, and two or more contact pins which are arranged on the end of the lamp cap opposite the glass body. The contact pins are inserted for connection to a voltage source in the sockets of a lamp socket connected to the lamp housing, with a close fit between the sockets and the contact pins for the high current levels of the lamp current to be transmitted is necessary.

At the same time, the contact pins serve, for example, discharge lamps which are socketed on one side as fastening means for the discharge lamp. As with increasing lamp power and the size of the discharge lamps and in particular the length of the glass body and the lamp base increases, the lamps at larger lamp power on such a size that especially in a horizontal mounting position of the discharge lamps considerable forces acting on the addition to the power supply as mounting contacts Contact pins are exercised.

These forces lead to a deterioration of the contact between the contact pins and the sockets of the lamp socket, resulting in an increased contact resistance in the transmission of the lamp current, a displacement of the lamp the focus of the reflector and thereby due to a reduced light output and a transfer of forces is connected to the interior of the lamp, which can lead to excessive voltages and eventually to the failure of the lamp.

However, the disadvantages of the exclusive storage of the lamp via the contact pins affect not only the static range on the size of the lamp, but especially in the dynamic range in the transport of a headlight or its operation with jerky pivoting movements, bumps on the lamp housing and the like.

In order to use a lamp housing for lamps with different lamp base diameters without replacement of a recording device and to use the pins of the lamps exclusively for the transmission of the lamp current can, in which consists of the DE 198 16 364 C2 known lamp housing, the receiving device of clamping jaws which engage around the lamp base and by means of the adjusting device in an open position in which the lamp cap is released, and in a locking position in which the lamp cap is fixed, are adjustable. The adjusting device consists of a pawl with two geometrically identically shaped inclined surfaces which rest on the upper and lower clamping jaw in such a way that when an adjustment of the pawl, the clamping jaws are radially spread.

Object of the present invention is to provide a lamp housing of the aforementioned type which allows the inclusion of lamps with different lamp base diameters in a wide range and a simple means variable range for different lamp base diameter that a defined clamping force exerted on the lamp base, built compact is, prevents mechanical stress on the contact pins of the lamp, in which the lamps are automatically centered and ensures easy operation when changing the lamp.

This object is achieved by the features of claim 1.

The solution according to the invention makes it possible to use lamps with different lamp base diameters in a wide range without replacement of a receiving device and the compensation of nominal deviations. As a result, the lamps are always optimally centered in the lamp axis, whereby a maximum light output is ensured. At the same time it ensures that the contact pins of the lamp serve exclusively for the transmission of the lamp current, without exercising a holding and / or fastening function for the lamp. By the action of the adjusting device on the lever arms of the clamping jaws, the area of the lamps to be accommodated by the receiving device can be set and changed with simple means, so that a simple lamp replacement is ensured.

By arranging an adjusting member with respect to the adjusting axis diametrically arranged parts a defined by the distance of the parts clamping force is generated. Since the adjusting member is rotatable about the adjustment axis, the lamp housing can be built very compact and therefore space-saving used.

The separation of adjusting and adjustment axis also allows easy determination of the range of the male of the receiving device different lamp diameter.

Preferably, the adjustment axis is connected to the adjusting member and an actuating member for the adjusting device for opening or closing the jaws and extends perpendicular to the longitudinal extent of the lever arms.

By the connection of the adjustment axis with the adjusting member and an actuator on the one hand a simple operation of the side of the lamp housing with little effort with optimal visibility of the clamping area is guaranteed at a lamp replacement and on the other hand by the direct connection of the adjusting with the adjustment a particularly compact design possible.

The adjusting device preferably pushes apart the prestressed prestressed in the locking position of the jaws lever arms against the bias and leads them together in the direction of the bias, so that a defined clamping force clamps the lamp cap. Alternatively, implemented by a suitable connection of the adjusting member with the lever arms, for example in the form of a slotted guide, the rotational movement of the adjusting member in a pincer movement of the lever arms and optionally additionally provided a locking in the locking position, so that the pinching force not by the bias of the lever arms, but is determined by the small center distance of the adjusting member.

In a preferred embodiment of the invention, the adjusting member consists of at least one cam acting on the lever arms, which has at least two preferably mutually perpendicular axes of different lengths, preferably from a centrally mounted between the lever arms Ellipsoidscheibe whose peripheral edge connected to the lever arms or at supported these trained camps.

This embodiment of the adjustment allows opening and closing of the jaws with little effort and a simple determination of the diameter range for the lamps to be picked by the geometry of the cam or Ellipsoidscheibe, so that by simply dimensioning the geometry of the cam or the major and minor axis the Ellipsoidscheibe the clamping area of the receiving device can be determined.

The adjustment axis can be connected either centrally or eccentrically with the curve or Ellipsoidscheibe so that when centered between the lever arms Verstellachse a symmetrical opening of the jaws in relation to the axis of symmetry, while off-center between the lever arms extending adjustment axis an asymmetric opening of the jaws he follows.

Preferably, the bearings consist of circular disk-shaped bronze bearings, which are in particular rotatably mounted on the lever arms.

The design of the bearings as circular-shaped bronze bearings and their rotatable attachment to the lever arms ensures a low frictional force for easy opening and closing of the jaws, low wear and high heat resistance.

An alternative embodiment of the adjustment consists of a force acting on the lever arms, rotatable about the adjustment roller bearing, which preferably has at least two mutually spaced bearing rollers disposed on the periphery of a rotatable about the adjustment roller carrier and open or closed jaws to the lower or Upper sides of the lever arms or formed on the lever arms or supported with these supports are supported This embodiment of the adjustment represents a kinematic reversal of the formed as a cam or ellipsoidal adjusting member which bears against the connected to the lever arms support bearings, and has a rotating about the adjustment axis bearing element, while on the side of the lever arms a smooth, rigid support surface is realized, which consists either of a folded-sheet metal angle of the lever arms or the fact that the bearing element runs between the upper and lower sides of the lever arms and is supported on the upper and lower sides.

The roller bearing may have two diametrically opposed to each other at the ends of the rotatable about the adjustment roller carrier bearing rollers in the simplest embodiment, which rest with open jaws to the biased in the closing direction of the jaws lever arms.

In this embodiment, the bearing rollers are brought to rest on the lever arms by turning the adjusting axis and this moves against a spring bias to open the jaws. By rotating the adjustment by 90 °, for example, the lever arms are moved to each other under the action of the spring bias and the jaws closed. Since a labile position of the roller bearing is given in the open position of the jaws, either a one-hand operation is required in which the adjustment is held in the open position of the jaws, or the adjustment is connected to a corresponding locking device with an open and closed position.

In an alternative embodiment, the roller bearing consists of two perpendicularly intersecting support arms of different lengths, the intersection of which is connected to the adjustment, wherein the arranged at the ends of the longer support arm bearing rollers press the lever arms to open the jaws apart and at the ends of the shorter Support arm arranged bearing rollers with closed jaws rest against the lever arms.

In this embodiment, the roller bearing occupies two defined states, in each of which two opposing bearing rollers rest against the lever arms. Also in this embodiment, the adjustment axis can be connected to a locking or locking device in an open and closed position to secure the respective position.

Another alternative of the roller bearing consists of a designed as an isosceles triangle roller carrier, at the corners of the bearing rollers are arranged. In the closed position of the jaws are all three bearing rollers on the lever arms, while resting in the open position two the base side of the isosceles triangle forming bearing rollers on the lever arms.

Preferably, the actuating member for the adjusting device for opening or closing the jaws on the outside of the lamp housing arranged adjusting or Verstellknauf, so that with one hand the jaws to release the lamp to be replaced in the open position, if necessary acting against a closing direction of the jaws Spring bias can be brought with the other hand, the lamp from the lamp holder removable, a replacement lamp in the lamp holder used and by adjusting the adjusting lever or adjusting knob or by releasing the adjusting lever or adjusting knob in the closing direction spring-loaded jaws, the replacement lamp is received by the receiving device.

The actuator can be optionally connected to a on the outside of the lamp housing, in a recess of the lamp housing or within the lamp housing and covered with a flap lever or Verstellknauf for easy operation of the adjustment.

In one embodiment of the solution according to the invention, the adjustment axis or the actuating member is connected to a locking or locking device securing the opening or closing position of the clamping jaws so that the respective position of the clamping jaws can be seen and ensures a secure position of the locking device, particularly in the open position of the clamping jaws is.

In a preferred embodiment of the invention, the lever arms are arranged on both sides of the lamp socket and connected at their front ends with a first and second jaw, between the two, arranged on each side of the lamp holder lever arms a cam or Ellipsoidscheibe is preferably provided are connected to the guided by the lamp socket adjustment axis.

Due to the two-sided arrangement of cam or Ellipsoidscheiben the opening and closing movement on both lever arms of the upper and lower clamping jaw transferred, so that a simple and safe operation without jamming and easy, safe centering are guaranteed.

For biasing the jaws in their closed position are used in particular tension and / or compression springs, either the upper and lower lever arms are clamped together via tension springs, which are arranged in the region of the jaws between the upper and lower lever arms, or the upper and lower jaw and / or the upper and lower lever arms are connected via compression springs with the lamp housing or connected to the lamp housing socket carrier.

Furthermore, the upper and lower lever arms can be mounted at their opposite ends of the jaws on transversely to the longitudinal extent of the lever arms out and supported on the lamp housing or connected to the lamp housing socket carrier supported bearing rods.

By the connection of the actuator with a means for opening and closing the receptacle contacts of the lamp socket can be combined with the actuator in dual function release of the contact pins and the lamp cap of the lamp with the simultaneous release and locking of the lamp by the jaws.

Due to the polygonal shape of the jaws with a preferably trapezoidal cutout of a rectangular surface a simple centering of the lamps within the receiving device is ensured regardless of the lamp diameter.

According to a further feature of the invention, the clamping jaws are spread apart in the direction of gravity up and down, so that when a lamp replacement always a support of the lamp cap is ensured by the respective lower jaw. In this case, the geometry of the jaws is such that a path compensation between the upper and lower jaw is made to compensate for the weight caused by the weight of the lamp and its effect due to the elongated glass body dodging the lamp down.

A further embodiment of the solution according to the invention is characterized in that the clamping jaws axially spaced apart receive the lamp cap and the lamp holder is freely movably supported on the lamp housing.

The arrangement of a plurality of jaws in the axial direction of the lamp cap allows a uniform support and support of the lamp and ensures that the recorded in the sockets of the lamp socket pins are free of any bearing forces. The freely movable support of the lamp holder on the lamp housing in the manner of a "floating storage" ensures that no impact forces transmitted to the glass body of the lamp and a compensation for movement is ensured.

According to a further feature of the invention, the lamp holder is resiliently connected to the socket carrier, so that ensures simple means an effective resilient support on the lamp housing and thus the lamp is effectively protected against shock or sudden changes in direction of the lamp housing even at great length of the lamp.

Fig. 1

eine perspektivische Darstellung einer Aufnahmevorrichtung für eine Lampe mit einem Fassungsträger, einer Lampenfassung, verstellbaren Klemmbacken zur Aufnahme eines Lampensockels und einer Verstell- einrichtung für die Klemmbacken;

Fig. 2

eine Vorderansicht der Klemmbacken, Lampenfassung und Verstellein- richtung gemäß Fig. 1;

Fig. 3

eine vergrößerte, perspektivische Detailansicht der Verstelleinrichtung mit einem als Ellipsoidscheibe ausgebildeten Verstellglied;

Fig. 4 und 5

eine schematische Darstellung eines als Rollenlager mit vier Lagerrollen ausgebildeten Verstellgliedes in einer Öffnung- und Schließstellung und

Fig. 6 und 7

eine schematische Darstellung eines Rollenlagers mit drei an den Ecken eines dreieckförmigen Rollenträgers angeordneten Lagerrollen in einer Öffnungs- und Schließstellung.

Reference to an embodiment shown in the drawing, the idea underlying the invention will be explained in more detail. Show it:

Fig. 1

a perspective view of a receptacle for a lamp with a socket carrier, a lamp holder, adjustable jaws for receiving a lamp cap and an adjustment device for the jaws;

Fig. 2

a front view of the jaws, lamp holder and Verstellein- direction according to Fig. 1 ;

Fig. 3

an enlarged, perspective detail view of the adjustment with an ellipsoidal disk as adjusting member;

4 and 5

a schematic representation of a designed as a roller bearing with four bearing rollers adjustment in an open and closed position and

6 and 7

a schematic representation of a roller bearing with three arranged at the corners of a triangular roller carrier bearing rollers in an open and closed position.

Fig. 1 shows in a perspective view via a spring-loaded bearing with a lamp housing not shown in detail for a headlight socket holder 1, which receives a lamp socket 2 with sockets 7, 8 for power supply, in which the contact pins of a lamp or a burner, in particular a discharge lamp , are used.

The lamp not shown in detail has an elongated, gas-filled glass body, a lamp cap and the contact pins for connection to the sockets 8, 9 of the lamp holder 2. Due to the length of the glass body and its weight and the weight of the lamp cap of the lamp act without an additional receiving device on the pins of the lamp, via which the lamp is connected to the lamp socket 2 and thus via the socket carrier 1 with the lamp housing, considerable forces, in particular dynamic forces in case of sudden change of direction of the lamp housing or on the lamp housing or the headlight acting shocks and the like, a. Since these forces are transmitted both into the interior of the lamp and there can lead to excessive voltages and failure of the lamp, and affect the electrical contact between the pins and the sockets 8, 9, the lamp power is reduced and there is a risk of premature failure the lamp.

To reduce or eliminate the forces acting on the pins and for improved support and clamping of the lamp, a receiving device in the form of two jaws 3, 4 is provided, which comprise the lamp base axially beabstahdet each other and clamp force and / or positive fit.

The upper jaw 3 and the lower jaw 4 are each connected to two lever arms 31, 32 and 41, 42, which are connected to their jaws 3, 4 opposite ends via transverse webs 33, 43 and abut flat against the lamp holder 2. Parallel to the transverse webs 33, 43 connecting rods 36, 46 between the lever arms 31, 32 and 41, 42 of the upper and lower jaw 3, 4 are provided, which are connected via resilient supports with the socket carrier 1.

Due to the resilient mounting of the lever arms 31, 32 and 41, 42 and thus of the jaws 3, 4, the receiving device is moved in the same plane in an example caused by shock lamp movement, so that the contact pins of the lamp remain free of tension. By also elastic support of the lamp socket 2 via a spring bearing relative to the socket carrier 1 ensures that no forces are transmitted to the pins of the lamp, so that the pins serve for the exclusive transmission of electrical power.

The upper and lower clamping jaws 3, 4 have a trapezoidal cut-out, so that in the clamping state of the lamp, the individual sides of the trapezoidal cut-outs bear a point contact on the usually cylindrical lamp base.

For adjusting the jaws 3, 4 of an open position in which the lamp socket is released to remove the lamp, in a closed or locking position in which the jaws 3, 4 clamp the lamp base and fix the lamp in position, serves an adjustment 5 with an adjusting member 51, 52 acting on the lever arms 31, 32, or 41, 42 and an adjusting shaft 7 connected to an actuating member for the manual actuation of the adjusting device 5.

The adjustment consists - as in particular the front view according to Fig. 2 can be seen - from both sides of the lever arms 31, 32, and 41, 42 arranged ellipsoidal disks 51, 52, whose peripheral edge with bronze bearings 34, 35 and 44, 45 cooperates. The large axis of the ellipsoidal disk 51, 52 between the two bronze bearings 34, 44 and 35, 45, so the lever arms 31, 32 and 41, 42 and thus the upper and lower jaw 3, 4 for removal or Replacing the lamp moved apart in the open position. If, however, the small axis of the ellipsoidal disk 51, 52 between the two bronze bearings 34, 44 and 35, 45, the lever arms 31, 32 and 41, 42 and thus the upper and lower jaw 3, 4 for power and Form-fitting contact with the lamp base in the closed or locked position.

The actuator consists of a guided through the center of the ellipsoidal disks 51, 52 and through the lamp holder 2 adjustment 7, which is not shown in detail Way outside the headlamp housing with a lever or an adjustment knob for manual operation of the adjustment is connected.

In the Fig. 1 to 3 assumes the adjustment in the form of ellipsoidal disk 51, 52 a position in which the large ellipse axis between the bronze bearings 34, 44 and 35, 45 and thus the lever arms 31, 32 and 41, 42 and the upper and lower jaw 3, 4 apart in the open position of the receiving device. Upon rotation of the adjustment axis 6 by 90 °, the small ellipse axis of the ellipsoidal disks 51, 52 between the bronze bearings 34, 44 and 35, 45, so that the lever arms 31, 41 and 32, 42 merged and thus the jaws 3, 4 in their closed or locked position force and positively applied to the lamp base of a lamp.

The enlarged detail view according to Fig. 3 It can be seen that the bronze bearings 34, 44 are rotatably attached via a Schraublager to the lever arms 31, 41, so that when rotating the ellipsoidal disk 51, the bronze bearings 34, 44 can slide along the outer surface of the ellipsoidal disk 51, whereby the sliding friction during adjustment the adjusting device is reduced. Furthermore, this simple mounting allows easy replacement of the bronze bearings 34, 44th

For spring preload of the lever arms 31, 32 and 41, 42 and thus of the jaws 3, 4 are preferably in the closed or locking position of the jaws 3, 4 serve in accordance Fig. 2 Federeinhängungen 37, 38 and 47, 48 on the outer edge of the jaws 3, 4, which are connected to each other, for example via tension springs with each other and / or compression springs with the surrounding lamp housing.

Additionally or alternatively, the transversely between the lever arms 31, 32 of the upper jaw 3 and the lever arms 41, 42 of the lower jaw 4 extending transverse rods 36, 46 are connected by compression springs with each other or via tension springs with the surrounding lamp housing, so that a corresponding bias the receiving device in the closed or locked position of the jaws 3, 4 is effected.

For lateral fixation of the adjustment 7 serve according Fig. 2 Bearing disks 11, 12 which are supported for example in cooling plates inside a headlight or in corresponding bearing receptacles of the lamp housing.

The front view according to Fig. 2 It can be seen that the sockets 8, 9 are formed for receiving the contact pins of the lamp for the power supply as a double socket or double sockets and are therefore suitable for lamps with different lamp power. Thus, the contact pins of a 12 kW discharge lamp can be inserted into the socket contacts 81, 11 of the double sockets 8, 9 at a smaller distance from each other, while the contact pins of a 18 kW discharge lamp are inserted into the receptacle contacts 82, 92 of the double sockets 8, 9 further apart be inserted.

In the 4 and 5 or 6 and 7 alternative adjusting devices for opening and closing the jaws 3, 4 are shown, in which a roller bearing 6 is provided in kinematic reversal to the adjusting device described above with a cam or ellipsoidal disk as adjusting and rotatable support bearings on the lever arms, the rotatable bearing rollers 61 to 64, which are connected via a roller carrier 65, 66 and 67 with the adjustment axis 7 and rotatably disposed about these, while the support of the roller bearing 6 on a smooth, rigid support surface 39, 49 of the lever arms 31, 32nd or 41, 42 takes place. The support surface 39, 49 of the lever arms 31, 32 and 41, 42 can be realized by a folded sheet metal angle of the lever arms 31, 32 and 41, 42 or in such a way that the bearing rollers 61 to 64 at the lower edge of the upper lever arm 31st , 32 or at the upper edge of the lower lever arm 41, 42 abut. A stable system is ensured inter alia by the fact that the width of the bearing rollers 61 to 64 is greater than the thickness of the lever arms 31, 32 and 41, 42.

At the in Fig. 4 illustrated embodiment of the adjusting member, the roller bearing 6 consists of two vertically crossing support arms 65, 66, of which one support arm 65 is longer than the other support arm 66. Through the point of intersection of the support arms 65, 66, the adjustment axis 7, so that the roller bearing 6 is rotatable about the adjustment axis 7. In the in Fig. 4 illustrated position of the roller bearing 6 are arranged at the ends of the short arm 66 bearing rollers 63, 64 in contact with the supports 39, 49 of the lever arms 31, 32 and 41, 42, in which the jaws 3, 4 are closed.

By rotation of the roller bearing 6 by 90 ° reach the arranged at the ends of the long support arm 65 bearing rollers 61, 62 in abutment against the support 39, 49 of the lever arms 31, 32 and 41, 42 and press the lever arms 31, 32 and 41, 42 optionally against a spring bias apart, and bring the jaws 3, 4 in the open position.

In a simplified version of the in the 4 and 5 shown roller bearing only two are provided at the ends of a rotatable about the adjustment axis 7 support arm, for example, the support arm 65 arranged bearing rollers 61, 62. In this embodiment, the jaws 3, 4 are open when the support arm 65 perpendicular between the lever arms 31 32 bzw. 41, 42 and the bearing rollers 61, 62 abut the lever arms 31, 32 and 41, 42. In a different position, for example, causes a spring bias of the lever arms 31, 32 and 41, 42 closing the jaws 3, 4, so that the support arm 65 is moved to a corresponding angular position relative to the open position of the jaws 3, 4.

In the 6 and 7 is a further alternative of an adjusting member shown, which consists of at the corners of a trained as an isosceles triangle plate roller carrier 67 bearing rollers 61 to 63 consists. In the in Fig. 6 illustrated closed position of the jaws 3, 4 are all three bearing rollers 61, 63 in contact with the support 39, 49 of the lever arms. 31, 32 and 41, 42, while in the in Fig. 7 shown opening position of the jaws 3, 4 which abut against the base side of the formed as an isosceles triangle plate roller carrier 67 bearing rollers 62, 63 on the supports 39, 49 of the lever arms 31, 32 and 41, 42. By turning the triangular-shaped support plate 67 about the adjustment axis 7, in each case the opening or closing position of the clamping jaws 3, 4 can be adjusted.

Since the receiving device with the jaws 3, 4 and the adjustment with the ellipsoidal disks 51, 52 and bronze bearings 34, 44 and 35, 45 determines and are suitable to accommodate a large diameter range of lamp bases for discharge lamps, thus the lamp housing according to the invention for receiving Lamps of different power and different size suitable, without a change of the socket carrier 1 or connected to the socket carrier 1 recording device is required.

LIST OF REFERENCE NUMBERS

1

fitting carrier

2

lamp socket

3

upper jaw

4

lower jaw

5

Adjustment element (ellipsoidal disc and bronze bearing)

6

Adjusting element (roller bearing)

7

adjustment axis

8.9

sockets

11, 12

bearing washers

31, 32

lever arms

33

crosspiece

34, 35

bronze bearings

36

connecting rod

37.38

Federeinhängungen

39, 49

In stock

41, 42

lever arms

43

crosspiece

44, 45

bronze bearings

46

connecting rod

47, 48

Federeinhängungen

51, 52

ellipsoidal disks

61-64

bearing rollers

65-67

roller carrier

81, 82

Receptacle contacts

91, 92

Receptacle contacts

Claims (30)

1. A lamp housing, particularly a spotlight housing, which contains an accommodating apparatus for a burner or a lamp with a glass vessel, a lamp base and contact pins for supplying current, and a lampholder with sockets for connection to the contact pins, the accommodating apparatus containing clamping jaws, which can be connected to the lamp base in a force-fitting and/or interlocking manner, engage at least partially around the lamp base, are articulated, via lever arms, on the lamp housing or a lampholder mount, which is fixed to the housing and is connected to the lamp housing, and can be adjusted by means of an adjusting device, which has at least one adjusting element, which is arranged between the lever arms and pushes the lever arms apart from one another for opening the clamping jaws (3, 4) into an opening position, in which the lamp base is released, and brings the lever arms together for closing the clamping jaws into a locking position, in which the lamp base is fixed,
   characterized
   in that the adjusting element (5, 6) is capable of rotating about an adjusting spindle (7) and, with parts which are at different distances from the adjusting spindle (7) and are arranged diametrically with respect to one another in relation to the adjusting spindle (7), bears against the lever arms (31, 32; 41, 42).
2. The lamp housing as claimed in claim 1, characterized in that the adjusting spindle (7) is connected to the adjusting element (5, 6) and an actuating element for the adjusting device (5, 6, 7) for opening or closing the clamping jaws (3, 4).
3. The lamp housing as claimed in claim 1 or 2, characterized in that the adjusting spindle (7) extends at right angles to the longitudinal extent of the lever arms (31, 32; 41, 42).
4. The lamp housing as claimed in one of the preceding claims, characterized in that the adjusting device (5, 6, 7) pushes the lever arms (31, 32; 41, 42), which are prestressed into the locking position of the clamping jaws (3, 4), apart from one another counter to the prestress or brings them together in the direction of the prestress.
5. The lamp housing as claimed in one of the preceding claims, characterized in that the adjusting element (5) comprises at least one cam disk (51, 52), which acts with its peripheral rim on the lever arms (31, 32; 41, 42).
6. The lamp housing as claimed in claim 5, characterized in that the cam disk (51, 52) has at least two axes of different lengths which are preferably at right angles with respect to one another.
7. The lamp housing as claimed in claim 6, characterized in that the cam disk comprises an ellipsoidal disk (51, 52), which is preferably mounted centrally between the lever arms (31, 32; 41, 42), and whose circumferential, peripheral rim is supported on bearings (34, 35; 44, 45), which are connected to or formed on the lever arms (31, 32; 41, 42).
8. The lamp housing as claimed in claim 7, characterized in that the bearings comprise bronze bearings (34, 35; 44, 45) in the form of circular disks.
9. The lamp housing as claimed in claim 8, characterized in that the bronze bearings (34, 35; 44, 45) in the form of circular disks are fastened to the lever arms (31, 32; 41, 42) in such a way that they can rotate.
10. The lamp housing as claimed in one of the preceding claims 5 to 9, characterized in that the adjusting spindle (7) runs through the center of the cam disk or ellipsoidal disk (51, 52).
11. The lamp housing as claimed in one of the preceding claims 5 to 9, characterized in that the adjusting spindle (7) runs eccentrically through the cam disk or ellipsoidal disk (51, 52).
12. The lamp housing as claimed in one of the preceding claims 1 to 4, characterized in that the adjusting element comprises a roller bearing (6), which acts on the lever arms (31, 32; 41, 42) and can rotate about the adjusting spindle (7).
13. The lamp housing as claimed in claim 12, characterized in that the roller bearing (6) has at least two bearing rollers (61 to 64), which are spaced apart from one another, are arranged at the periphery of a roller mount (65 to 67), which is capable of rotating about the adjusting spindle (7), and are supported, when the clamping jaws (3, 4) are open or closed, on the lower or upper sides of the lever arms (31, 32; 41, 42) or on supports (39, 49), which are formed on or connected to the lever arms (31, 32; 41, 42).
14. The lamp housing as claimed in claim 13, characterized in that the roller bearing (6) has two bearing rollers (61, 62 and 63, 64), which are arranged diametrically with respect to one another at the ends of the roller mount (65 and 66), which is capable of rotating about the adjusting spindle (7), and, when the clamping jaws (3, 4) are open, bear against the lever arms (31, 32; 41, 42), which are prestressed in the closing direction of the clamping jaws (3, 4).
15. The lamp housing as claimed in claim 14, characterized in that the roller mount comprises two supporting arms (65, 66), which intersect one another at right angles and are of different lengths and whose point of intersection is connected to the adjusting spindle (7), the bearing rollers (61, 62), which are arranged at the ends of the longer supporting arm (65), pushing the lever arms (31, 32; 41, 42) apart from one another for opening the clamping jaws (3, 4), and the bearing rollers- (63, 64), which are arranged at the ends of the shorter supporting arm (66), bearing against the lever arms (31, 32; 41, 42) when the clamping jaws (3, 4) are closed.
16. The lamp housing as claimed in claim 13, characterized in that the roller mount (67) is in the form of an equilateral triangle, and in that the bearing rollers (61 to 63) are arranged at the corners of the triangular roller mount (67).
17. The lamp housing as claimed in at least one of the preceding claims, characterized in that the actuating element, which is connected to the adjusting spindle (7), comprises an adjusting lever or adjusting knob, which is arranged on the outside of the lamp housing or within the lamp housing and in a depression of the lamp housing and is covered by a flap.
18. The lamp housing as claimed in one of the preceding claims, characterized in that the adjusting spindle (7) or the actuating element is connected to a latching or locking device, which secures the opening or closing position of the clamping jaws (3, 4).
19. The lamp housing as claimed in one of the preceding claims, characterized in that the lever arms (31, 32; 41, 42) are arranged on both sides of the lampholder (2) and, at their front end, are connected to an upper and lower (in the direction of gravitation) clamping jaw (3, 4), and in that a cam disk or ellipsoidal disk (51, 52) is provided between the two lever arms (31, 32; 41, 42), which are arranged on each side of the lampholder (2).
20. The lamp housing as claimed in claim 19, characterized in that the cam disks or ellipsoidal disks (51, 52) are connected to the adjusting spindle (7), which is guided through the lampholder (2).
21. The lamp housing as claimed in at least one of the preceding claims, characterized in that the upper and lower lever arms (31, 32; 41, 42) are connected to one another at their end opposite the upper and lower clamping jaw (3, 4) via a transverse web (33, 43).
22. The lamp housing as claimed in at least one of the preceding claims, characterized in that the upper and lower lever arms (31, 32; 41, 42) are braced with one another via tension springs and/or compression springs.
23. The lamp housing as claimed in claim 22, characterized in that the upper and lower lever arms (31, 32; 41, 42) are braced with one another via tension springs, which are arranged in the region of the clamping jaws (3, 4) between the upper and lower lever arms (31, 32; 41, 42).
24. The lamp housing as claimed in claim 22, characterized in that the upper and lower clamping jaw (3, 4) and/or the upper and lower lever arms (31, 32; 41, 42) are connected to the lamp housing or the lampholder mount (1), which is connected to the lamp housing, via compression springs.
25. The lamp housing as claimed in at least one of the preceding claims, characterized in that the upper and lower lever arms (31, 32; 41, 42) are mounted at their ends opposite the upper and lower clamping jaws (3, 4) on bearing rods, which are guided transversely with respect to the longitudinal extent of the upper and lower lever arms (31, 32; 41, 42) and are supported on the lamp housing or on the lampholder mount (1).
26. The lamp housing as claimed in at least one of the preceding claims, characterized in that the actuating element is connected to a device for opening and closing sockets (71, 72; 81, 82) of a lampholder (2).
27. The lamp housing as claimed in at least one of the preceding claims, characterized in that the clamping jaws (3, 4) are designed to be polygonal and preferably have a trapezoidal cutout from a rectangular surface.
28. The lamp housing as claimed in at least one of the preceding claims, characterized in that the clamping jaws (3, 4) can be spread apart from one another in the direction of gravitation upwards and downwards.
29. The lamp housing as claimed in at least one of the preceding claims, characterized in that the clamping jaws (3, 4), axially spaced apart from one another, accommodate the lamp base, and in that the lampholder (2) is supported on the lamp housing in such a way that it is freely moveable.
30. The lamp housing as claimed in claim 29, characterized in that the lampholder (2) is connected to the lampholder mount (1) in spring-elastic fashion.

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