Connection element

Abstract

A connection element for a circuit board that includes electronic components or LED illuminants on a top side and that includes contact fields on a bottom side which are used at least for supplying electrical voltage to the electronic components that are arranged on the circuit board, the connection element including a receiving element that includes a contact surface for the circuit board and pressure contacts configured to contact the contact fields of the circuit board and connection contacts configured to connect connection conductors that provide electrical voltage; and a cover element that supports the circuit board on the receiving element, wherein the cover element is arranged at the receiving element and pivotable about a pivot axis, wherein the cover element is movable between an open position and a closed position, wherein the cover element facilitates a placement of the circuit board onto the contact surface of the receiving element in the open position of the cover element, and wherein the cover element supports the circuit board between the cover element and the receiving element in the closed position of the cover element.

Claims

1. A connection element for a circuit board that includes a strip shaped LED lamp on a top side and that includes contact fields on a bottom side which are used at least for supplying electrical voltage to the electronic components that are arranged on the circuit board, the connection element comprising: a receiving element that includes a contact surface for the circuit board and pressure contacts with contact buds configured to contact the contact fields of the circuit board and connection contacts configured to connect connection conductors that provide electrical voltage; and a cover element that supports the circuit board on the receiving element, wherein the cover element is arranged at the receiving element and pivotable about a pivot axis between an open position and a closed position, wherein the cover element facilitates a placement of the circuit board onto the contact surface of the receiving element in the open position of the cover element, and wherein the cover element supports the circuit board between the cover element and the receiving element in the closed position of the cover element, wherein the cover element includes at least one contact pressure wring that pivots with the cover element and the circuit board is preloaded directly by the at least one contact pressure spring directly against the receiving element in the closed position of the cover element, wherein the cover element is a cover bar with two parallel arms that support the at least one contact pressure spring and that originate from a portion of the cover element that is proximal to the pivot axis and that are oriented orthogonal to the pivot axis, wherein a geometric axis is provided parallel to the pivot axis and arranged along the contact buds of the pressure contacts configured to contact the circuit board so that the geometric axis divides the receiving element into a section that is proximal to the pivot axis and a section that is remote from the pivot axis, and wherein a contact section of the at least one contact pressure spring at the circuit board is arranged in the section of the receiving element that is remote from the pivot axis when the cover element is in the closed position.

2. The connection element according to claim 1, wherein a spring force of the contact pressure spring is greater than opposite forces of the pressure contacts of the receiving element.

3. The connection element according to claim 1, wherein the cover element includes at least one interlocking device and the receiving element includes a corresponding interlocking contour, and wherein the interlocking device and the interlocking contour cooperate in a closed position of the cover element and support the cover element in the closed position.

4. The connection element according to claim 1, wherein the receiving element or the cover element include positioning and support contours that cooperate with opposite contours of the circuit board.

5. The connection element according to claim 1, wherein the arms are offset from each other and a receiving space for electronic components or optics of the circuit board is provided between the arms.

6. The connection element according to claim 3, wherein the at least one interlocking device of the cover element is an interlocking arm and the locking contour of the receiving element is formed by a receiving recess or by a receiving protrusion.

7. The connection element according to claim 1, wherein the at least one interlocking device of the cover element is an interlocking arm and the locking contour of the receiving element is formed by a receiving recess or by a receiving protrusion, and wherein a locking force of the interlocking arm is oriented transversal to the spring force of the at least one contact pressure spring.

8. The connection element according to claim 6, wherein the interlocking arm is provided with a disengagement bar that facilitates disengaging an interlocking between the cover element and the receiving element.

9. The connection element according to claim 1, wherein the connection element includes additional interlocking safety devices that facilitate fixing the connection element in a recess of the light housing.

10. A light element or light housing, comprising: a receiving surface for a circuit board provided with a strip shaped LED lamp, wherein the receiving surface includes a recess configured to arrange the connection element according to claim 1, and wherein the contact surface of the connection element and the receiving surface of the light element are arranged in a common plane.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) Additional advantages of the invention can be derived from the subsequent description of an advantageous embodiment with reference to drawing figures, wherein

(2) FIG. 1 illustrates an embodiment of the connection element according to the invention in a perspective top view;

(3) FIG. 2 illustrates a connection element according to FIG. 1 in a perspective view from below;

(4) FIG. 3 illustrates a view of a contact surface of the connection element according to the invention with the cover element in the closed position;

(5) FIG. 4 illustrates a sectional view according to sectional line A-A in FIG. 3;

(6) FIG. 5 illustrates a functional pairing of the connection element, the light element and the circuit board before insertion;

(7) FIG. 6 illustrates the functional pairing according to FIG. 5 with inserted circuit board with cover element in the open position;

(8) FIG. 7 illustrates the functional pairing according to FIG. 6 with the cover element in the closed position; and

(9) FIG. 8 illustrates a detail view of the detail circle Y in FIG. 7.

DETAILED DESCRIPTION OF THE INVENTION

(10) In the drawing figures the connection element according to the invention is designated overall with the reference numeral 10.

(11) The connection element 10 is now described with reference to its structure based on FIGS. 1 and 2. The connection element includes a cover element 11 configured as a pivotable approximately a U-shaped bar 12 that is arranged at a receiving element 13 and pivotable about a geometric axis S and configured to receive the circuit board.

(12) The U-shaped bar 12 includes two arms 14 that are oriented orthogonal to the pivot axis S wherein the ends of the arms that are oriented proximal to the pivot axis are connected with each other by a bridge 15 that is oriented parallel to the pivot axis. The arms 14 are furthermore provided with shaft openings 16 that are configured to receive stub shafts 17 that are formed by the receiving element 13. The stub shafts 17 form the physical pivot axis of the connection element 10.

(13) The free ends of the arms 14 are formed into contact pressure springs 18 by bending in a direction towards the receiving element 13. The arms 15 furthermore support interlocking devices 19 at the cover element configured as interlocking arms 20 which are provided with disengagement bars 21. The interlocking arms 20 facilitate locking the bar 12 in a closed position. The locking can be released by the disengagement bars 21.

(14) The bridge 15 which is in particular clearly visible in FIG. 2 supports a locking bar 22 that cooperates with interlocking blocks 23 which are arranged at the receiving element and that locks the cover element 11 in the open position.

(15) Thus, the cover element 11 cooperates with the receiving element 13 of the connection element 10. The receiving element 13 includes a housing body 30 that forms a contact surface 31 on its top side wherein the contact surface provides support for a circuit board 10. Contact recesses 32 are recessed in the support surface 31 and pressure contacts 33 are inserted into the contact recesses 32. The pressure contacts furthermore include non-illustrated clamping locations that are accessible for the stripped ends of a contact conductor through contact conductor openings 34 of the housing element 30. Positioning and support contours 35 protrude from the contact surface 31, thus configured as two opposite positioning and retaining mandrels 36 of which only one is illustrated. Laterally protruding interlocking contours 37 configured as interlocking protrusions 38 cooperate with the interlocking devices 19 of the cover element 11 in order to secure the cover element in the closed position.

(16) Last not least the cover element 13 includes locking bars 39 that facilitate a reliable anchoring of the receiving element in a recess of the light element 50. Tool openings 40 on a bottom side facilitate opening clamping locations of the pressure contacts 33 and thus disengaging the conductor ends inserted at this location.

(17) FIG. 3 illustrates the connection element 10 according to the invention in a top view with the cover element 11 in a closed position. FIG. 4 illustrates a sectional view according to the sectional line A-A in FIG. 3.

(18) FIG. 3 illustrates that the pressure contacts 33 respectively form a contact bud 41 wherein the contact buds are arranged on a common geometric axis K. The axis K divides the receiving element 13 in to a portion that is proximal to the pivot axis S and a portion that is remote from the pivot axis S. The contact section 42 of each contact spring 18 is arranged in the portion of the receiving element 13 that is remote from the pivot axis in the illustrated embodiment.

(19) The functional pairing of a light element 50 and of the connection element 10 according to the invention during insertion of a circuit board 60 configured as a LED line lamp is now described with reference to FIGS. 5-8.

(20) The light element 50 is schematically illustrated as a sheet metal strip with a recess 51. The surface of the light element 50 that is oriented towards the circuit board 60 is used as a receiving surface on which the circuit board 60 is configured to contact with its bottom side.

(21) The connection element 10 according to the invention is arranged in the recess 51, wherein the contact surface 31 of the receiving element 13 is oriented in the same plane with the receiving surface of the light element.

(22) The circuit board 60 is provided with a plurality of LEDs 61 on its top side, wherein the LED's 61 are arranged in series behind one another. The circuit board 60 is an elongated strip thus made e.g. from a suitable carrier metal like aluminum that is provided with an insulation layer on which the LED 61, non-illustrated conductive paths and required additional electronic components are arranged. In addition to these circuit boards also designated as metal core circuit boards all other types of circuit board materials are suitable.

(23) It is not illustrated that the conductive paths that are arranged on a top side of the circuit board 60 and connect the LEDs with one another are run at a connection side end of the circuit board 60 to a bottom side of the circuit board and form contact fields at this location that cooperate with the pressure contacts 33. The conductive paths can be run to the bottom side through a pressure contact. By the same token it is possible to imprint the bottom side with the conductive paths accordingly. It is also conceivable that a foil conductor is attached at a receiving element side end of the circuit board 60 on a top side wherein the foil conductor is then folded over and contacts the bottom side.

(24) The circuit board 60 is then applied to the light element 50. The connection element side end of the circuit board 60 then contacts the contact surface 31 of the connection element 10. The contact buds 41 of the pressure contacts 33 come into electrical contact with the non-illustrated contact fields on a bottom side of the circuit board 60 so that a voltage supply of the LEDs and optionally of additional electronic components of the circuit board is assured.

(25) Since the contact surface 31 and the receiving surface of the light element 50 are arranged at the same level the circuit board contacts the light element 50 in a mechanically stable manner with its entire surface. This is advantageous in particular for very elongated circuit boards 60, so called LED line lamps. In addition to providing mechanical stability this contact of circuit board 60 and light element 50 also provides advantageous heat dissipation in particular when the light element 50 is configured as a cooling element.

(26) Going beyond a particular circuit board size additional attachment devices can be advantageous for fixing at the light element depending on stiffness of the circuit board.

(27) The contact pressure springs 18 of the arms 14 of the cover element 11 are thus placed onto a top side of the circuit board 60 and loaded with a spring force that impacts the circuit board 60 when moved into the closed position of the cover element 11. This spring force is oriented against a spring force of the pressure contacts 33 which assures a reliable contact of the contact buds 41 at the non-illustrated contact fields of the circuit board 60. The locking arms 20 reach behind the locking protrusions 38 of the receiving element 13 in the closed position and thus secure the closed position of the cover element 11. The positioning and support mandrels 36 of which only one is illustrated engage corresponding positioning and support recesses 62 of the circuit board 60 and secure a correct position of the circuit board in the receiving element and secure the circuit board in the receiving element mechanically in a permanent manner.

REFERENCE NUMERALS AND DESIGNATIONS

(28) 10 connection element 11 cover element 12 bar 13 receiving element 14 arm 15 bridge 16 shaft opening 17 stub shaft 18 contact pressure spring 19 interlocking device 20 interlocking arm 21 disengagement bar 22 interlocking bar 23 interlocking block 30 housing body 31 contact surface 32 contact recess 33 pressure contact 34 connection conductor opening 35 positioning and support contour 36 positioning and support mandrel 37 interlocking contour 38 interlocking protrusion 39 interlocking bar 40 tool opening 41 contact bud 42 contact section 50 light element 51 recess 60 circuit board 61 LED 62 positioning and support recess S pivot axis K geometric axis