DE102007006884A1 - Light emitting diode lamp, has round, hollow plug-in socket and printed circuit board arranged on both sides of plug-in socket and protruding in plug-in socket, which carries light emitting diodes at its protruding end - Google Patents

Abstract

The light emitting diode (LED) lamp (1) has round, hollow plug-in socket (2). A printed circuit board (6) is arranged on both sides of the plug-in socket and protruding in plug-in socket, which carries LED (3) at its protruding end (6a). The electrical contact (4) is formed by a shell sided metal pin (7) protruded over the plug-in socket. Another electrical contact (5) is formed at the face of the other protruding end (6b) of the printed circuit board.

Description

The The present invention relates to an LED lamp with a round, hollow plug-in base, at whose one open base end at least one LED (light emitting diode) is arranged, with a first electrical Contact, which is provided on the socket shell side, and with a second electrical contact provided at the other base end is.

Such an LED lamp is for example from the DE 299 09 861 U1 known.

On So-called BA9 pedestal lamps are available on the market, where a light bulb in a round socket (BA9 socket) is arranged. This BA9 socket is a cylindrical metal body with two peripherally opposed locking lugs. The metal body forms a first electrical contact and at the same time serves to fix the BA9 base lamp in the Socket of a lamp. The metal body, however, is relative consuming in manufacturing, and moreover an additional part for insulation and mounting one on the socket end provided second contact (center contact) is required.

From the above DE 299 09 861 U1 is a LED lamp with a BA9 socket known, in which a standard LED is used. However, the leads of the LED must be laboriously soldered to the metal body and the center contact.

In contrast, It is the object of the present invention, in an LED lamp of the aforementioned type to simplify the production.

These The object is achieved according to the invention that in the socket a projecting from both sides of the socket Printed circuit board is arranged, which at its one projecting end the at least one LED carries that first electrical contact by a shell side on the socket above Metal pin is formed, the two opposite each other Cross holes of the socket passes through and the circuit board electrically contacted, and that the second electrical contact on the front side of the other protruding end of the circuit board is trained.

• – Fixierung der Leiterplatte innerhalb des Stecksockels.
• – Elektrische Kontaktierung der Leiterplatte, z. B. mittels einer elektrisch durchkontaktierten Bohrung der Leiterplatte und einer Rändelung auf der Stiftmitte (gleichzeitiges elektrisches Kontaktieren und Klemmen der Leiterplatte). Das eine bzw. die beiden überstehenden Stiftenden bilden den ersten elektrischen Kontakt der LED-Lampe.
• – Positionierung/Ausrichtung der LEDs im Stecksockel.

According to the invention, a BA9 plug socket which is complicated and difficult to contact is no longer required, but the LED or LEDs are arranged on a printed circuit board. A thin metal pin is pressed through the socket and preferably also through the printed circuit board and takes on the following tasks:

• - Fixation of the circuit board within the socket.
• - Electrical contacting of the circuit board, z. B. by means of an electrically plated hole in the circuit board and a knurling on the center of the pen (simultaneous electrical contacting and clamping the circuit board). The one or the two protruding pin ends form the first electrical contact of the LED lamp.
• - Positioning / alignment of the LEDs in the socket.

Of the second electrical contact of the LED lamp is through the front side the circuit board formed, for example, like the solder point a conventional BA9 socket shaped and also is provided with an electrically conductive layer. alternative can soldered at this point a small metal contact be to wear the contact surface in case of vibration to prevent. Due to the specified orientation of the circuit board to the metal pin and the LEDs are aligned to the metal pin. Depending on the plug socket training, the circuit board from the front and / or be inserted from behind into the socket. Most notably Preferably, the dimensions of the invention correspond LED lamp that a conventional BA socket lamp (z. B. BA9 or BA15, ....) to the inventive LED lamp in conventional sockets of BA pedestal lamps to be able to use.

Preferably the socket is a plastic injection molded part, which both the Guide the PCB in the socket as well as the guide the LED lamp in the version of a lamp takes over.

• – COB-LEDs besitzen aufgrund optimaler Wärmeableitung eine wesentlich höhere Lichtausbeute als normale LEDs.
• – Aufgrund ihrer geringen Abmessung können viele COB-LEDs auf der Leiterplatte angeordnet und so kann die Helligkeit der LED-Lampe deutlich erhöht werden.
• – Mehrere LED-Chips sind vorteilhaft in Reihe geschaltet, um die Verlustleistung des Vorwiderstandes zu verringern. Dadurch und durch die guten Wärmeableitfähigkeiten der COB-LEDs ergeben sich sehr niedrige Temperaturen, was wiederum eine deutliche Helligkeitssteigerung bewirkt.
• – Das Licht der LED wird etwa rechtwinklig zur Stecksockelrichtung abgestrahlt, was in den meisten Fällen der Haupt-Nutzungsrichtung der LED-Lampe entspricht.
• – Die Lage des Brennpunktes der LED-Lampe entspricht dem der Standard-Sockellampe, so dass entsprechende Optiken (z. B. für ein Leselicht) auch mit der LED-Lampe funktionieren.

Particularly preferably, the one or more LEDs are formed by COB LEDs (chip on-board LEDs), resulting in the following advantages:

• - COB LEDs have a much higher light output than normal LEDs due to optimal heat dissipation.
• - Due to their small size, many COB LEDs can be arranged on the PCB and thus the brightness of the LED lamp can be increased significantly.
• - Several LED chips are advantageously connected in series to reduce the power loss of the series resistor. This and the good heat dissipation capabilities of the COB LEDs result in very low temperatures, which in turn causes a significant increase in brightness.
• - The light of the LED is emitted approximately at right angles to the socket position, which in most cases corresponds to the main direction of use of the LED lamp.
• - The location of the focus of the LED lamp This corresponds to the standard pedestal lamp, so that corresponding optics (eg for a reading light) also work with the LED lamp.

Farther Preferably, one or more series resistors are on the circuit board and a rectifier provided so that the LED lamp polungsunabhängig is and can also be operated with alternating current. Also on the Back of the circuit board can be more LEDs be provided to any reflector also available to illuminate.

advantageous Embodiments of the invention are the subject of the dependent claims. Further advantages of the invention will become apparent from the description and the drawing. Likewise, the above and the features listed below for each to use one or more in any combination. The embodiment shown and described is not to understand as a final list, but has rather exemplary character for the description of the Invention.

It demonstrate:

1 the LED lamp according to the invention with plug-in socket in a longitudinal section according to II in 2 ;

2 the LED lamp of 1 in a plan view;

3 the LED lamp of 1 in a perspective view; and

4 the LED lamp of 1 in a front view.

In the 1 shown LED lamp 1 has a round, hollow socket 2 , at whose one open base end 2a three LEDs 3 are arranged, a first electrical contact 4 on the socket 2 is provided on the shell side, and a second electrical contact 5 on, at the other base end 2 B is provided. The socket 2 is preferably an injection molded part made of plastic.

In the socket 2 is a two-sided from the socket 2 protruding printed circuit board 6 arranged at its one protruding end 6a the LEDs 3 wearing. In the illustrated embodiment, the circuit board 6 over the open base end 2a , ie from the front, into the socket 2 inserted.

The first electrical contact 4 is by a coat side over the socket 2 protruding metal pin 7 formed, the two opposite transverse bores 8th of the socket 2 passes through and the circuit board 6 electrically contacted. The metal pin 7 is on the shell side over the socket 2 on both sides, and its two ends form the second electrical contact 4 , The metal pin 7 is in the cross holes 8th and through a recess 9 the circuit board 6 forming an electrical contact with the circuit board 6 pressed. More precisely, the recess 9 an electrically plated through hole in the circuit board 6 into which the z. B. knurled metal pin 7 is pressed with the formation of an electrical connection with the feedthrough.

The second electrical contact 5 is through the front of the other protruding end 6b the circuit board 6 formed and shaped as the solder point of a conventional socket and also provided with an electrically conductive layer. Alternatively, at this point, even a small metal contact to the circuit board 6 be soldered to wear of the second contact 5 to prevent vibration.

The light of the LEDs 3 is radiated substantially perpendicular to the header direction, which in most cases corresponds to the main direction of use of these lights. In order to obtain a brightness corresponding to the standard pedestal lamp, the LEDs are 3 white COB LEDs (chip on board LEDs). With this COB technology, individual LED chips are placed directly on the PCB 6 brought. The chip connectors and the circuit board 6 are connected to a gold wire (bondwire). The LED chips can be packed close together, which emits more light from a smaller area. The LED chips are from a drop of epoxy resin 10 covered and protected. A directional light output can be achieved by the epoxy resin or with attached lenses. Size, number and positioning of the LED chips or luminous dots can be selected individually. Thus, several LED chips can be placed within a lens, which optically creates a light point, which makes it possible to focus the emitted light using an optical system and align. Furthermore, on the circuit board 6 two more resistors 11 and a rectifier 12 intended. The rectifier 12 allows the LED lamp 1 polarity independent to a voltage source and also to connect to AC power.

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• - DE 29909861 U1 [0002, 0004]

Claims (11)

Led lamp ( 1 ) with a round, hollow plug-in base ( 2 ), at whose one open base end ( 2a ) at least one LED ( 3 ) is arranged with a first electrical contact ( 4 ) on the socket ( 2 ) is provided on the shell side, and with a second electrical contact ( 5 ) at the other end of the base ( 2 B ) is provided, characterized in that in the socket ( 2 ) one on both sides of the socket ( 2 ) projecting printed circuit board ( 6 ) is arranged, which at its one projecting end ( 6a ) the at least one LED ( 3 ) carries that the first electrical contact ( 4 ) by a shell side over the socket ( 2 ) projecting metal pin ( 7 ) is formed, the two opposite transverse bores ( 8th ) of the socket ( 2 ) and the printed circuit board ( 6 ) and that the second electrical contact ( 5 ) at the end face of the other protruding end ( 6b ) of the printed circuit board ( 6 ) is trained. LED lamp according to claim 1, characterized in that the metal pin ( 7 ) on the shell side over the socket ( 2 ) projects on both sides. LED lamp according to claim 1 or 2, characterized in that the metal pin ( 7 ) in the transverse bores ( 8th ) is pressed. LED lamp according to one of the preceding claims, characterized in that the metal pin ( 7 ) in a recess ( 9 ) of the printed circuit board ( 6 ) forming an electrical contact with the printed circuit board ( 6 ) is pressed. LED lamp according to claim 4, characterized in that the recess ( 9 ) defining wall of the circuit board ( 6 ) is electrically conductive. LED lamp according to one of the preceding claims, characterized in that the plug-in base ( 2 ) consists of non-electrically conductive material, in particular plastic. LED lamp according to one of the preceding claims, characterized in that on the circuit board ( 6 ) at least one series resistor ( 11 ) is provided. LED lamp according to one of the preceding claims, characterized in that on the circuit board ( 6 ) a rectifier ( 12 ) is provided. LED lamp according to one of the preceding claims, characterized in that the one or more LEDs ( 3 ) are designed as COB LEDs. LED lamp according to one of the preceding claims, characterized in that the LEDs ( 3 ) only on one or both sides of the circuit board ( 6 ) are arranged. LED lamp according to one of the preceding claims, characterized in that the LED lamp ( 1 ) corresponds in size to a standard pedestal lamp.