WO2006092112A2

WO2006092112A2 - Base for a lamp

Info

Publication number: WO2006092112A2
Application number: PCT/DE2006/000199
Authority: WO
Inventors: Peter Helbig; Thomas Schmidt-Lehmann
Original assignee: Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH
Priority date: 2005-03-01
Filing date: 2006-02-07
Publication date: 2006-09-08
Also published as: WO2006092112A3; DE102005009902A1; DE102005009902B4

Abstract

The invention relates to a base for a lamp, particularly for a discharge lamp with connecting elements for connecting the base and with at least one contacting element. The connecting elements are arranged so that a relative movement between the contacting element and the base establishes a mechanical and/or electrical connection between the base and the contacting element. According to the invention, the base has at least three connecting elements for connecting to the contacting element.

Description

Socket for a lamp

TECHNICAL FIELD The invention relates to a base according to the preamble of patent claim 1 and to a lamp provided with such a base according to the preamble of patent claim 18.

State of the art

The base according to the invention can in principle be used in a large number of single-ended lamps. However, the main field of application of the socket is likely to lie in discharge lamps for headlights, especially for vehicle headlights, which are surrounded by an outer bulb and are inserted on one side into a socket.

A discharge lamp with such a base is described for example on the Internet domain www.osram.de under the product name "XENARC®". These conventional lamps have a P32d type socket

Use. This connector has on the plug side two diametrically arranged peg-shaped connecting elements, which are connected to an outer diameter of the

Base body are attached. These pins serve to receive and releasably fix a contacting element, for example one

Contact plug, at the socket. For mounting the contact plug on the base of this four offset by 90 ° guide, in which the pins of the base are inserted. After the complete insertion of the contact plug, it can be rotated from its unlocked position via a rotary movement into a locking position, wherein the pins on

Move away locking elements of the contact plug and engage in a bayonet - in other words - the pins of the base form together with the Locking elements of the contact plug a bayonet fitting, which allow mounting of the contact plug on the base in the axial direction and a lock or release by rotating about the longitudinal axis of the plug, wherein the contact plug is held in its locking position on the base and durchfuhrt the electrical contact of the discharge lamp , Due to the arrangement and number of guide grooves are four offset by 90 ° offset mounting positions of the contact plug on the lamp base and thus four departure position for the radially emerging from the contact plug connection cable, so that the handling of the contact plug is facilitated in the headlight.

A disadvantage of such sockets is, on the one hand, that because of the lack of distinguishing features on the base, a confusion of the lamp types and, as a result, a faulty installation of the lamp can occur. A faulty installation of the lamp leads to a reduced service life and to the destruction of the lamp, since, for example, mercury-free discharge lamps have different electronic properties than conventional discharge lamps and therefore require other pre-scarf tgeräte and ignition devices for operation. Furthermore, it is disadvantageous that the mechanical loading of the pins requires materials with a high strength due to the mechanical plug forces necessary for a secure contacting and sealing function between base and contact plug. As a result, such sockets are expensive to manufacture.

Presentation of the invention

The invention has for its object to provide a base for a lamp, in particular for a discharge lamp and equipped with such a socket lamp in which compared to conventional solutions encoding with minimal device complexity and improved support of the contact plug is made possible on the base.

This object is achieved with regard to the base by the feature combination of claim 1 and with respect to the lamp by the features of claim 18 solved. Particularly advantageous embodiments of the invention are described in the dependent claims.

The base according to the invention for a lamp, in particular for a discharge lamp, has connecting elements for connecting the base to at least one contacting element, which are arranged such that a relative movement between the contacting element and the base establishes a mechanical and / or electrical connection between the base and the contacting element. According to the invention, the base has at least three connecting elements for connection to the contacting element. This solution allows a clear distinction to conventional sockets, for example of the type P32d due to the mechanical coding by means of the third connecting element. As a result, a confusion of the lamp types and a faulty connection of the contact plug on the base is effectively prevented. According to the invention, the use of at least three connecting elements further reduces the mechanical stress on the individual connecting elements, so that the use of high-strength base materials, as required in conventional solutions with two connecting elements, can be dispensed with. As a result, cheaper plastics with hitherto insufficient mechanical properties can be used according to the invention and the production costs of the base compared with the solution mentioned at the outset can be reduced.

According to a particularly preferred embodiment of the invention, the connecting elements are arranged offset by 120 ° to each other on the base. The symmetrical arrangement of the connecting elements enables a simple component design of the base and of the contact plug, whereby the production of the base is further simplified with reduced production costs.

Preferably, the connecting elements are arranged on an outer peripheral surface of a fixing portion of the base. The base preferably engages over the peripherally projecting connecting elements in recesses of the contacting element and can be fixed there via this.

In a preferred embodiment of the invention, the connecting elements are designed as substantially cylindrical pins. These may be integrally formed, for example by injection molding, with the base and are due to their shape manufacturing technology easy to produce.

It has proved to be particularly advantageous if the contacting element is rotatable relative to the locking elements and releasably securable to the base by means of a bayonet catch.

Preferably, the contacting element is designed as a contact plug and held by means of the connecting elements to the base.

The base preferably has two slot-shaped recesses arranged diametrically opposite one another, which extend axially relative to a longitudinal axis of the base and enable positioning of the lamp in the base.

The lamp, for example a discharge lamp, is preferably insertable into the base via the recesses in at least one defined rotational position and can be fixed there in a rotationally fixed manner.

To connect the base to the lamp holding elements, in particular spring tabs are arranged in the region of a receiving portion of the base.

In an embodiment according to the invention four retaining elements are arranged in the region of the receiving portion of the base, which are bent into the receiving portion and between which the lamp is directly or indirectly receivable and fixable. Preferably, a first power supply of the lamp via a Stromrückführung is electrically connected to a contact surface and a second power supply to a contact pin of the base.

According to a preferred embodiment, the base is inserted into a headlight, in particular in a vehicle headlight. For this purpose, the base is preferably brought into abutment with the headlight via a substantially annular flange.

In order to ensure the correct position mounting of the lamp in the headlight, positioning elements can be provided on the flange. These are preferably formed as recesses on the outer circumference of the flange, engage in the projections of the headlamp.

In a variant according to the invention, the flange has a substantially rectangular recess and an approximately semicircular recess.

BRIEF DESCRIPTION OF THE DRAWINGS The invention will be explained in more detail below on the basis of a preferred exemplary embodiment. Show it:

Figure 1 is a schematic representation of a preferred embodiment of the socket according to the invention with the discharge lamp inserted;

Figure 2 is a three-dimensional detail of the base of Figure 1;

Figure 3 is another perspective of the base of Figure 2;

Figure 4 shows a three-dimensional view of the base of Figure 2 with contacting element and

5 shows a further three-dimensional representation of the base of Figure 2. Preferred embodiment of the invention

The invention will be explained below with reference to a single-ended discharge lamp for a vehicle headlight. However, as already mentioned, the socket according to the invention is by no means limited to such lamp types.

1 shows a schematic representation of a base 1 according to the invention with a mercury-free high-pressure discharge lamp 2 inserted therein. This has a discharge vessel 4 made of quartz glass with an inner space 6 and two diametrically arranged, sealed end sections 8, 10, each having a current feedthrough 12, 14. In the interior 6 protrude two diametrically arranged electrodes 16, 18 which are each connected to one of the current feedthroughs 12, 14 and between which forms a gas discharge during lamp operation. In the interior 6 of the discharge vessel 4 an ionizable filling is included, which consists of high purity xenon gas and a plurality of metal halides. The discharge vessel 4 is surrounded by an outer bulb 20, which consists of quartz glass, which is provided with ultraviolet radiation absorbing dopants. The base 1 carries the two lamp vessels 4, 20 and is connected to the electrical terminals of the lamp. The current feedthrough 12 of the socket-distal end section 8 of the discharge vessel 4 is connected via a current return 22 and a contact plate 23 (see FIG. 3) to a first electrical contact 24 designed as a contact ring, while the other current leadthrough 14 has a second electrical connection 26 formed as a contact pin (see Figure 5) of the base 1 is electrically connected. The current return 22 is additionally surrounded by an insulating sleeve 28.

According to FIG. 2, which shows a three-dimensional detail representation of the base 1 from FIG. 1, the latter has an at least sectionally cylindrical base body 30, which has a receiving section 32 with a receiving bore 34 on the lamp side. The base 1 has in the region of the receiving portion 32 two diametrically arranged in an inner circumferential wall 36 of the receiving bore 34 slot-shaped longitudinal grooves 38, 40 for positioning the discharge lamp 2 in Base 1 (see Figure 1). The longitudinal grooves 38, 40 extend axially parallel to a longitudinal axis 42 of the base 1. The discharge lamp 2 can be inserted via the longitudinal grooves 38, 40 in at least one defined rotational position in the base 1. The insertion of the discharge lamp 2 in the base 1 is facilitated by an end face on the inner peripheral wall 36 of the receiving bore 34 formed bevel 44. The receiving portion 32 is the front side in a provided with a circumferential inclined surface 46 Einführkegel 48 for inserting the base 1 in the headlight (not shown) via. The Einführkegel 48 is interrupted by four offset by 90 ° about U-shaped recesses 50 which extend frontally to about the height of an at least partially annular flange 52, so that the Einführkegel 48 consists of four individual segments 54. In the recesses 50 of the Einführkegels 48 a holding element 56 is arranged in each case, which extends substantially along the longitudinal axis 42 of the base 1. About the holding elements 56, the discharge lamp 2 to the base 1 is connectable. In the embodiment shown, the holding elements 56 are formed as spring tabs 58 and inserted into the inner circumferential wall 36 of the receiving bore 34. For receiving and releasably fixing the discharge lamp 2 in the base 1, the spring tabs 58 are bent into the receiving bore 34, so that the discharge lamp 2 is receivable and fixable between them. For mounting of the base 1 in the headlight, the flange 52 has a contact surface 60 which can be brought via knob-like projections 62 in contact with the headlight housing (not shown).

As Figure 3 can be removed, two positioning elements 64 are provided on the flange 52, which facilitate a correct position mounting of the base 1 in the headlight. For this purpose, an approximately semicircular recess 70 is formed on an outer circumference 66 of the flange 52, a substantially U-shaped rectangular groove 68 and spaced therefrom in the circumferential direction, in which two projections (not shown) of the headlight housing intervene when the base 1 is inserted into the headlight. so that the rotational position of the base 1 is fixed about the longitudinal axis 42 and this can be mounted only in a defined bearing direction in the headlight. According to FIG. 4, which shows a further illustration of the base 1, the base 1, after the flange 52 on the plug side, merges into a cylindrical fastening section 72. According to the invention, three peripherally projecting connecting elements 74 (see FIG. 3) for connecting the base 1 to a schematically indicated contacting element 76 are formed on the base 1 in the region of the fastening section 72. This solution makes possible, due to the third connecting element 74, a mechanical coding and thus a clear distinction from conventional P32d type sockets. As a result, a confusion and a faulty connection of the contacting element 76 on the base 1 is effectively prevented. According to the invention, the mechanical loading of the individual connecting elements 74 is reduced by the use of three connecting elements 74, so that it is possible to dispense with high-strength base materials, as required in conventional solutions with two connecting elements. As a result, according to the invention, plastics with hitherto insufficient mechanical properties can be used, whereby the production costs of the base 1 are substantially reduced.

The connecting elements 74 are arranged such that a relative movement of the contacting element 76 with respect to the base 1 causes a connection between the base 1 and the contacting element 76. For this purpose, the contacting element 76 is rotatable relative to the connecting elements 74 and by means of a bayonet lock (not shown) releasably secured to the base 1. In the illustrated embodiment, the connecting elements 74 are formed as cylindrical pins 78, which can be seen in particular Figure 3, each at an angle α corresponding to 120 °, offset on an outer peripheral surface 86 of the mounting portion 72 of the base 1 are arranged and a step surface 82 of the base 1 flush (see Figure 5). The mounting portion 72 is plug-side stepped in a cylindrical contact portion 84 with respect to the mounting portion 72 of reduced outer diameter on the peripheral surface 86 of the electrically conductive contact ring 24 is inserted, which is flush with the peripheral surface 86 of Contact section 84 completes. The contact ring 24 forms a contact surface and, as already explained, is electrically connected to the current return 22 guided in the discharge vessel (see FIG. 1) of the discharge lamp 2. According to Figure 4, the contacting element 76 is held by means of the pin 78 on the mounting portion 72 of the base 1. In the illustrated embodiment, the contacting element 76 is formed as a contact plug 92 which is connected via an electrical line 93 to a remote from the discharge lamp ignition unit (not shown), which is required to ignite the discharge lamp 2 at the beginning of its operation. However, the socket 1 according to the invention is also suitable for contacting elements 92 with an integrated ignition unit. Due to the integration of the ignition unit into the contacting element 92, no high-voltage-carrying electrical lines between the discharge lamp 2 and the ignition unit are required in this variant.

As can be seen in particular from FIG. 5, which shows a further three-dimensional representation of the base 1, the contact section 84 of the base 1 is formed, at least in sections, as a hollow cylinder 88. In a blind hole 90 of the hollow cylinder 88, the contact pin 26 is arranged, which extends along the longitudinal axis 42 of the base 1 and is electrically conductively connected to the second Stromdurchfuhrung 14 of the discharge lamp 2. In the embodiment shown, the base 1 of the discharge lamp 2 is made of electrically insulating plastic.

The essential steps of the assembly of the contact plug 92 on the base 1 will be explained below with reference to FIG.

The contact plug 92 is pushed to its mounting in the direction of the longitudinal axis 42 on the base 1. For this purpose, the contact plug 92 has at its pointing to the base 1 of the discharge lamp 2 holding portion 94 a step-shaped recess 96 into which the mounting portion 72 of the base 1 is einfuhrbar. The recess 96 has on its inner circumference at least three outwards recessed and coaxial with the longitudinal axis 42 of the base 1 extending, offset by 120 ° guide grooves (not shown) into which the pins 78 of the base 1 are inserted, so that the contact plug 92 about the longitudinal axis 42 rotatably on the base 1 can be pushed , When inserting the contact plug 92 on the mounting portion 72 of the base 1 reach the contact elements (not shown) of the contact plug 92 into contact with the contact ring 24 of the mounting portion 72. Furthermore, the contact pin 26 (see Figure 5) in a contact sleeve, not shown, of the contact plug 92nd inserted and contacted electrically. By a circumferential chamfer 98 of the mounting portion 72, the insertion of the contact plug 92 is facilitated on the base 1. After the complete insertion of the contact plug 92 of this is rotated from its unlocked position into a locking position, with the pins 78 move over not shown locking elements and lock there - in other words - the pin 78 form together with the locking elements a bayonet lock, which is an assembly the contact plug 92 on the base 1 in the axial direction and a lock or release by rotation about the longitudinal axis 42 of the base 1 allows. In the locking position, the contact plug 92 is held on the base 1 and the electrical contacting of the discharge lamp 2 is performed. The disassembly of the contact plug 92 and the base 1 takes place in the reverse order as explained above.

The base 1 according to the invention is not limited to the described holder of the discharge lamp 2 by means of spring clips 58, but any known from the prior art connection technology can be used, which allows a secure mounting of the lamp tubes 4, 20 on the base 1. Furthermore, the socket according to the invention can have more than three connecting elements 74.

Disclosed is a base 1 for a lamp 2, in particular for a discharge lamp, with connecting elements 74 for connecting the base 1, and with at least one contacting element 76, wherein the connecting elements 74 in such a way are arranged that a relative movement between the contacting element 76 and socket 1 produces a mechanical and / or electrical connection between the base 1 and contacting element 76. According to the invention, the base 1 has at least three connecting elements 74 for connection to the contacting element 76.

Claims

claims

1. socket for a lamp (2), in particular for a discharge lamp, with connecting elements (74) for connecting the base (1) with at least one contacting element (76), wherein the connecting elements (74) are arranged such that a relative movement between the contacting element

(76) and base (1) produces a mechanical and / or electrical connection between base (1) and contacting element (76), characterized in that the base (1) has at least three connecting elements (74) for connection to the contacting element (76). having.

2. Socket according to claim 1, wherein the connecting elements (74) offset by 120 ° to each other on the base (1) are arranged.

A socket according to claim 1 or 2, wherein the connecting members (74) are disposed on an outer peripheral surface (80) of a fixing portion (72) of the socket (1).

4. Socket according to one of the preceding claims, wherein the connecting elements (74) as a substantially cylindrical, radially projecting pin (78) are formed.

5. Socket according to one of the preceding claims, wherein the base (1) via the peripherally projecting connecting elements (74) engages in recesses of the contacting element (76) and can be fixed there over there.

6. Socket according to claim 5, wherein the contacting element (76) relative to the connecting elements (74) rotatably and by means of bayonet lock releasably on the base (1) can be fixed.

7. Socket according to one of claims 5 or 6, wherein the contacting element (76) is a contact plug (92) and is held by means of the connecting elements (74) on the base (1).

8. Socket according to one of the preceding claims, with two diametrically opposed longitudinal grooves (38, 40) for positioning the lamp (2) in the base (1) extending axially to a longitudinal axis (42) of the base (1).

9. Socket according to claim 8, wherein the lamp (2) via the longitudinal grooves (38, 40) in at least one defined rotational position in the base (1) insertable and there rotatably fixed.

10. Socket according to one of the preceding claims, wherein in the region of a receiving portion (32) of the base (1) holding elements (56), in particular spring tabs (58) are arranged, via which the base (1) with the lamp (2) connectable is.

11. Socket according to claim 10, with four holding elements (56) which are bent into the receiving portion (32) and between which the lamp (2) is directly or indirectly receivable and fixable.

12. Socket according to one of the preceding claims, wherein a first power supply (12) of the lamp (2) via a current return (22) having a contact surface (24) and a second power supply (14) with a contact pin (26) of the base (1 ) is electrically connected.

13. Socket according to one of the preceding claims, wherein the base (1) via a substantially annular flange (52) with a headlight, in particular a vehicle headlight, can be brought into contact.

14. Socket according to claim 13, wherein on the flange (52) positioning elements (64) for the defined mounting of the base (1) are provided on the headlight.

15. Socket according to claim 14, wherein the positioning elements (64) as recesses (68, 70) in an outer circumference (66) of the flange (52) are formed, engage in the projections of the headlamp.

16. Base according to spoke 15, wherein the flange (52) has a substantially rechteckfόrmige recess (68) and an approximately semicircular recess (70).

17. Socket according to one of the preceding claims, wherein the base (1) made of an electrically insulating material, preferably a plastic.

18. Lamp having a base (1), in particular according to one of the preceding claims 1 to 17, with connecting elements (74) for connecting the base (1) of the lamp (2) with at least one contacting element (76), wherein the connecting elements (74 ) are arranged such that a relative movement between the contacting element (76) and base (1) produces a mechanical and / or electrical connection between the base (1) and contacting element (76), wherein the lamp (2) inserted into a headlight and over there at least three connecting elements (74) is releasably fixed.