CN104864370B

CN104864370B - Lighting device with small tube socket

Info

Publication number: CN104864370B
Application number: CN201510080868.1A
Authority: CN
Inventors: 斯特凡·林格勒; 托马斯·克拉夫塔
Original assignee: Ledvance GmbH
Current assignee: Landes Vance
Priority date: 2014-02-24
Filing date: 2015-02-13
Publication date: 2020-09-01
Anticipated expiration: 2035-02-13
Also published as: DE202014001680U1; CN104864370A; DE102014206652A1

Abstract

The invention relates to a lighting device (1) having a housing (2) in which a driver (4) is mounted, wherein the driver (4) is connected to at least one contact pin (5) and the at least one contact pin (5) is guided through the housing (2) in order to form a small-sized tube socket (5, 6), wherein the at least one contact pin is held on the housing (2) by means of a securing element (11) which is attached to the contact pin (5). A method for manufacturing a lighting device (1) having at least the following steps: providing at least one clamping disc (11) on the carrier; introducing the drive into the housing by passing at least one contact pin (5) through a lead-through (3) of the housing (2); and at least one clamping disk (11) is pushed onto the at least one contact pin (5) from the outside until it is blocked by the housing (2). In particular, the invention can be applied to semiconductor retrofit lamps, in particular lamps having a small tube socket, in particular of the MR16 type.

Description

Lighting device with small tube socket

Technical Field

The invention relates to a lighting device having a housing in which a driver is mounted, which driver is connected to at least one contact pin, wherein the at least one contact pin is guided through the housing to form a compact tube socket. In particular, the invention can be applied to semiconductor retrofit lamps, in particular lamps having a small tube socket, in particular of the MR16 type.

Background

Hitherto, LED retrofit lamps have been assembled from a plurality of components, either in a plurality of work steps in a production line or manually. Some LED retrofit lamps have a small tube holder. To manufacture these retrofit lamps, the contact pins or pins of the LED lamp are soldered during assembly of the electrical driver. When finally assembling the LED retrofit lamp, the driver is inserted into the housing and the contact pins are LED out of the housing through holes or leadthroughs provided for this purpose. The contact pin is then only connected to the housing in a form-fitting manner. This form-fitting connection is not suitable for withstanding the forces acting on the driver during insertion of the LED retrofit lamp into the lamp holder. Therefore, when the LED retrofit lamp is inserted, the force acting on the contact pin ("insertion force") is transmitted directly to the driver. In order to intercept the insertion forces, costly and highly precise design solutions for fixing or producing additional steps are required before they act via the driver on other components of the LED lamp (for example on the housing cover, the cooling body, the so-called light engine, the optical system, etc.). The LED lamp can be destroyed during insertion into the lamp cap without preventing transmission of the insertion force to the driver.

In order to prevent the transmission of insertion forces to the drive, it is known to cast or "pot" the drive in a housing. Filling with casting material implies a time consuming production step. In addition, there is a waiting time of up to 8 hours for hardening the potting material or potting material. The weight of the lamp is also significantly increased. Furthermore, the encapsulation is disadvantageous to be carried out due to the temperature increase which occurs at this time. Furthermore, the lifetime of the joint with the housing by potting is unknown. Furthermore, the cost of potting is high.

It is also known to grind the contact pins in order to improve the adhesion of their surface in the leadthroughs of the housing. This leads to additional costs and problems with tightness at the lead-through.

It is also known to bolt Light generating elements, such as so-called "Light engines" to the housing. Thereby, the light engine acts as a stop for the fixation of the driver against the extrusion effect. However, high bending stresses and/or bending of the driver can occur when the lamp is mounted in the lamp holder. Additional costs for the bolts should also be noted, and expensive plastic pieces are required as bolt-on supports for the light engine.

Disclosure of Invention

The object of the present invention is to overcome at least partially the disadvantages of the prior art and in particular to provide an improved possibility for reducing the application of force to the driver when the lighting device is introduced into the electrical interface.

This object is achieved according to the features of the independent claims. In particular, preferred embodiments can be given by the dependent claims.

This object is achieved by a lighting device having a housing in which a driver is mounted, which is connected to at least one contact pin, wherein the at least one contact pin is guided through the housing for forming a small-scale socket, and wherein the at least one contact pin is held on the housing by means of a securing element which is slipped onto the contact pin.

Advantages of the lighting device include, for example, a reduction in cost compared to potting, since potting material is no longer required. The filling time and the time for waiting for the potting to harden are also eliminated, which significantly reduces the assembly effort. Furthermore, a cost reduction of the components of the lighting system is achieved, since larger tolerances can be achieved. A reliable and high-quality fixing of the driver with high supporting force is achieved. In addition, the securing element is extremely inexpensive and can be obtained in a number of variants. For holding the driver or the like in the housing, additional fixing elements such as snaps or bolts and processing steps such as milling are no longer required.

It is not necessary to equip all contact pins with a securing element, which further reduces the assembly effort. A particularly cost-effective design is therefore that exactly one contact pin is held by means of a securing element.

An advantageous embodiment for a particularly effective blocking of the drive is to hold each of the contact pins by means of a corresponding securing element or to equip all contact pins with a securing element.

In particular, the at least one securing element is arranged on the outside of the housing. In one refinement, the securing element is not directly connected to the housing or is not directly fastened to the housing, but rather is held on the housing only by the contact pins.

The securing element can be made of metal or plastic, for example. Metal has particularly high strength, whereas plastic can be electrically insulating.

In a development, the securing element is a clamping element, which enables particularly simple assembly, since no further processing of the contact pin is required. The holding between the contact pin and the clamping element is thus effected at least by means of clamping, possibly additionally by form-fitting.

In one embodiment, the clamping element is a clamping disk. The clamping disk is a very inexpensive standard part, which, in addition, is capable of generating high supporting forces in the range of, for example, 200N. The force exerted on the contact pins when the lighting device is inserted into the corresponding socket can be transmitted to the housing via the clamping disk.

The clamping disk can be slipped over the respective contact pin and rest on the housing, which can be easily and automatically transferred into the production line.

It is not necessary to equip all contact pins with clamping disks, which further reduces the assembly effort. For a particularly effective locking of the drive, all contact pins are provided with clamping disks.

In addition or alternatively, the securing element can be a securing element which is held at least in a form-fitting manner, for example a catch disk or a real card

A crescent ring. For this purpose, the corresponding contact pin can have a latching structure on the outside, for example an annular groove or at least one recess. Thereby, the sealing performance is not deteriorated. The expenditure for introducing the latching structure on the contact pin is significantly less than the expenditure for grinding. Such a securing element can hold the contact pin in a form-fitting manner or in a form-fitting and force-fitting manner.

In a further embodiment, the housing has a recess on the outside for inserting the securing element in the region of the lead-through for the at least one contact pin. The recess provides the advantage that it forms a stop for the lateral displacement of the securing element, which also allows for higher tolerances and also further improves the mechanical locking. For example, lateral bending of the contact pins and thus possible contact of the two securing elements when the lighting device is installed in the socket in a rough and incorrect manner can thus be prevented.

In another embodiment, the securing element is an integrated component of the housing. The securing element is thus formed as a housing region. This makes it possible to dispense with a separately manufactured and/or assembled fuse element.

In a further development, the securing element integrated into the housing has one or more elastically bendable webs or tongues which project into the passage of the corresponding contact pin. The tab or spring can thus bend with the insertion of the contact pin and thus hold the contact pin. Thus, a fixation like a clamping disk can be achieved, for example.

The housing with the safety element or the latching region integrated therein can be produced, for example, by means of a die-casting method.

One embodiment which facilitates a particularly secure connection is that the contact pin has a toothing which extends in its longitudinal extension. Then, for example, a securing element, for example, one or more webs of a clamping disk, can be used as a latching spring. This provides a snap-on connection which can be easily fitted and, if appropriate, also as an additional clamping fit. Thus, by pushing the contact pin onto the corresponding securing element (or vice versa), a gradual latching is achieved which is particularly difficult to release again (for example, like a cable binder).

In still other embodiments, the small-scale tube socket is a double pin socket (Bipin-socket), in particular a G-type socket, in particular a GU 5-type socket, in particular a GU 5.3-type socket. In particular, the lighting device can be an MR16 retrofit lamp.

The lighting device can be, for example, a lamp or a lighting module.

In a further embodiment, the lighting device is a semiconductor retrofit lamp. For this purpose, it has at least one semiconductor light source and is designed as a replacement for conventional lamps, for example incandescent lamps or halogen lamps. The lighting device can be designed, for example, as a replacement for the MR16 lamp.

Preferably, the at least one semiconductor light source has at least one light-emitting diode. When there are a plurality of light emitting diodes, they can emit light in the same color or different colors. The color can be monochromatic (e.g., red, green, blue, etc.) or polychromatic (e.g., white). The light emitted by the at least one light emitting diode can also be infrared light (IR-LED) or ultraviolet light (UV-LED). A plurality of light emitting diodes capable of generating mixed light; for example white mixed light. The at least one light-emitting diode can contain a wavelength-converting phosphor (conversion LED). Alternatively or additionally, the Phosphor material can be arranged Remote from the light-emitting diode ("Remote Phosphor"). The at least one light-emitting diode can be present in the form of at least one individual light-emitting diode with a housing or in the form of at least one LED chip. A plurality of LED chips can be mounted on a common substrate ("Submount"). The at least one light-emitting diode can be equipped with at least one individual and/or common optical system for directing the beam, for example at least one Fresnel lens (Fresnel-line), collimator or the like. As an alternative or in addition to inorganic diodes based on InGaN or AlInGaP, for example, organic LEDs (OLEDs, for example polymer OLEDs) can also be used. Alternatively, the at least one semiconductor light source can have, for example, at least one diode laser.

The object is also achieved by a method for producing a lighting device, wherein the method has at least the following steps: a) providing at least one clamping disk on the carrier; b) introducing a drive equipped with at least one contact pin into the housing while guiding the at least one contact pin through the lead-through or the hole of the housing; and c) pushing the at least one clamping disk onto the at least one contact pin from the outside until it is stopped by the housing. This enables a particularly simple assembly. This method can be designed similarly to the lighting device and the same advantages are obtained.

The securing element can thus be a clamping disk.

In this case, it is essentially irrelevant whether the contact pin and/or the at least one securing element are moved.

Steps b) and c) can also be carried out together, for example by inserting at least one contact pin through the lead-through onto the corresponding securing element. In this case, for example, the securing element can lie flat on the outside of the housing in step b).

Drawings

The above features, characteristics and advantages of the present invention and how to implement and method will be more clearly understood in conjunction with the following schematic description of embodiments set forth in detail in connection with the accompanying drawings. For the sake of clarity, identical or functionally identical elements can be provided with the same reference symbols.

Fig. 1 shows a side sectional view of a lighting device according to a first embodiment;

fig. 2 shows a side sectional view of a lighting device according to a second embodiment; and is

Fig. 3 shows a side sectional view of a housing of a lighting device according to a third embodiment.

Detailed Description

Fig. 1 shows a side sectional view of a lighting device according to a first embodiment in the form of a retrofit lamp 1 for replacing a conventional MR16 lamp.

The retrofit lamp 1 has a housing 2 which is open at its front face and has two feedthroughs 3 at its rear face. A drive 4 in the form of drive electronics is arranged in the housing 2. Two contact pins 5 are fastened, for example welded, to the driver 4, which project partially through the feedthrough 3. The contact pins 5 together with the counter areas 6 of the housing 2 form a GU 5.3-type socket. The

sockets

5, 6 are adapted to fit in matching lamp sockets.

The front open face 7 of the housing 2 is covered by a cover 8, on the outside of which a base body 9 for a semiconductor light source in the form of an LED10 is arranged. In this case, the LED10 emits its light into the front half. Not shown but there can be a light-transmissive (transparent or opaque) cover for the LED 10.

An electrical signal, for example a supply voltage of, for example, 12 volts, can be passed to the driver 4 via the contact pin 5. The driver 4 converts these electrical signals into operating signals for operating the LEDs 10. The operating signal can be conducted via electrical lines, not shown, to the base body 9, which acts as a circuit board, and on to the LEDs 10.

In order to withstand the insertion forces transmitted to the contact pins 5 in the direction of the drive 4 during the assembly of the

sockets

5, 6 without mechanically loading the drive 4, the two contact pins 5 are covered or sheathed by an external securing element, for example in the form of a metallic clamping disk 11. One of the clamping disks 11, as indicated by the straight arrow, is also shown separately in plan view. The clamping disk 11 is located on the housing 2 and has a supporting force of, for example, 200N. This means that the clamping disk 11 does not move onto the contact pin 5 until an insertion force of approximately 200N when an insertion force is applied in the longitudinal direction. More precisely, the insertion force exerted on the contact pin 5 is transmitted to the housing 2 serving as a support by means of the clamping disk 11. While mechanical loading of the driver 4 is prevented.

Fig. 2 shows a side sectional view of a modified lamp 21 according to a second embodiment. The retrofit lamp 21 is constructed similarly to the retrofit lamp 1. The housing 2 now has, on the outside, in the region of the two feedthroughs 3, in each case an annular recess 23 for the insertion of the respective clamping disk 11. The recess 23 therefore serves firstly for the sinking of the clamping disk 11 and secondly as a lateral stop for the clamping disk 11. By its function as a lateral stop, for example, a soldered connection between the contact pin 5 and the driver 4 is better ensured. Thus, for example, even greater tolerances of the feed-through 3 can be achieved.

In order to put the clamping disk 11 on, it can be pushed past the contact pin 5 into the recess 23, as indicated by the straight arrow P. In this case, it is essentially irrelevant whether the clamping disk 11 and/or the contact pin 5 are moved. Thus, in order to fix the clamping disk 11, it can be inserted into the corresponding recess 23, where it is first held with a force of more than 200N, and the drive 4 is then mounted in the housing 22. With the driver 4 installed, the contact pins 5 are guided through the respective leadthroughs 3 and continue through the clamping disk 11. This movement of the drive 4 continues until it abuts, for example, internally against the housing 22.

Fig. 3 shows a side sectional view of a housing 32 of a retrofit lamp 31 according to a third embodiment. The retrofit lamp 31 can be constructed similarly to the

retrofit lamp

1 or 21. It does not have a separately produced clamping disk 11, but rather a plurality of elastically bendable webs 34 which project into the path of the corresponding contact pin (corresponding to the leadthroughs 33) and are an integral part of the housing 32. The tabs 34 are in step the housing areas that are manufactured with the remaining housing 32. The housing 32 and its webs 34 can be produced from plastic, for example, in a die-casting process.

The webs 34 are designed as projections which project into the lead-through 33, starting from the inner side of the lead-through 33. In particular, the tab 34 lies flush at the outer side of the housing 32, in particular flush with the outer side surface.

As the contact pin 5 is inserted into the lead-through 33, the webs 34 bend elastically outward and exert a restoring force on the contact pin 5. The restoring force serves to clampingly hold the contact pin 5.

Although the invention has been illustrated and described in detail by the embodiments shown, the invention is not restricted thereto and other variants can be derived by the person skilled in the art without departing from the scope of protection of the invention.

The contact pins 5 can therefore have contact structures on the outside, for example steps, which are introduced into the longitudinal extension of the contact pins.

In general, "a" or "an" can be understood as singular or plural, in particular "one" or "one or more" in the sense of "at least one" or "one or more", etc., unless expressly excluded, for example by the expression "exactly one" or the like.

The quantitative statements also encompass both the exact recited amounts and the usual tolerance ranges, provided they are not explicitly excluded.

Reference numerals

1 retrofit lamp

2 casing

3 threading part through the housing

4 driver

5 contact pin

6 reverse region of the housing

7 front open side of the housing

8 cover

9 base body

10 LED

11 clamping disk

21 modified lamp

22 casing

23 depressed part

31 modified lamp

32 shell

33 threading part

34 contact piece

The P arrow.

Claims

1. A lighting device (1; 21; 31) having a housing (2; 32) in which a driver (4) is mounted, the driver (4) being connected to at least one contact pin (5) and guiding the at least one contact pin (5) through the housing (2) to form a small tube socket (5, 6), wherein the at least one contact pin (5) is held on the housing (2) by means of a securing element (11; 2, 34) which is slipped onto the respective contact pin (5) and which rests on the outside of the housing (2).

2. The lighting device (1; 21) according to claim 1, wherein at least one of the clamping elements is a clamping disc (11).

3. The lighting device (21) as claimed in claim 1, wherein the housing (2) has a recess (23) for inserting the securing element (11) on the outside in the region of the lead-through (3) for the at least one contact pin (5).

4. A lighting device according to any one of claims 1 to 3, wherein exactly one contact pin is held by means of a fuse element.

5. The lighting device (1; 21; 31) as claimed in one of claims 1 to 3, having a plurality of contact pins (5), wherein each of the contact pins (5) is held by means of a respective securing element (11; 2, 34).

6. The lighting device (1; 21; 31) according to any one of claims 1 to 3, wherein the small tube socket (5, 6) is a two pin socket.

7. The lighting device (1; 21; 31) according to claim 6, wherein the mini-tube holder (5, 6) is of the G-type.

8. A lighting device (1; 21; 31) according to claim 7, wherein the mini-tube holder (5, 6) is of the GU type.

9. A lighting device (1; 21; 31) according to claim 8, wherein the mini-tube holder (5, 6) is of the GU5 type.

10. The lighting device (1; 21; 31) as claimed in claim 9, wherein the mini-tube holder (5, 6) is of the GU5.3 type.

11. The lighting device (1; 21; 31) according to any one of claims 1 to 3, wherein the lighting device is a semiconductor retrofit lamp.

12. Method for manufacturing a lighting device (1; 21) according to claim 2, wherein the method has at least the following steps:

a) providing at least one clamping disc (11) on the carrier;

b) introducing a drive (4) into the housing (2) by passing at least one contact pin (5) through a lead-through (3) of the housing (2);

c) at least one clamping disk (11) is pushed onto at least one contact pin (5) from the outside until it is stopped by the housing (2).

13. The method of claim 12, wherein steps b) and c) are performed together.