EP0664583B1 - Small incandescent lamp holder - Google Patents

Abstract

A small electric light bulb (10) is mounted into a holder (7) that fits into an aperture formed in a circuit board (PCB) (1). The PCB has a hole formed with an essentially circular cross- section and with two oppositely positioned slots that allow locking arms to be inserted. The main body (9) of the holder has a pair of arms (13) with tip sections (15) that latch into position. Contact arms (12) engage tracks on the PCB.

Description

The invention relates to a socket for a small incandescent lamp for releasable and fixable insertion in one of the sockets adapted opening provided with marginal extensions a circuit board and contacting the lamp by pressing of the lamp connecting wires guided on resilient contact arms to the conductor tracks of the circuit board.

With such sockets to be arranged on printed circuit boards Different fastening mechanisms are already known. For example, a plug-in or locking mechanism, by means of which the lamps by simply clipping into the corresponding PCB opening on the side, on which usually other components are assembled be this clipping in, since it's just a linear Movement acts, simply by means of an automatic placement machine can be done. As a result of this snap fastening however, the lamp can only be removed from the side on which it was used, which leads to the fact that the Lamp often removed the entire circuit board from the device and only then can the retrofit take place. Another one The lamps are partially driven by the mechanism PCB opening inserted and by a rotary movement attached to the plate, which is why a machine assembly is difficult, but cumbersome to assemble by hand must become. Here too there is the disadvantage that Replacing the lamp if it is fitted on the component side is again necessary to remove the circuit board is. If the lamp is attached to the opposite side of the plate, this means that there is usually no need to remove a printed circuit board, however, this assembly has one on the opposite side very cumbersome initial assembly with a separate operation result.

Finally, EP 0 274 262 A2 and US-4 005 924 Sockets for small incandescent lamps known in the opening a circuit board from both sides under operation corresponding insertion and holding mechanisms be used.

The invention is therefore based on the object, a version for a small incandescent lamp, which for a Vending machine from the component side is suitable and for the purpose of replacement without complex disassembly of the device simply removed from the opposite side of the panel and retrofitted can be.

To achieve this object, a version according to claim 1 is provided This version can therefore be particularly advantageous the component side by means of an automatic placement machine be, which is why they are advantageous in the context of an assembly line can be integrated. For exchange then the lamp simply on the opposite side of the plate using the loosening twist fixation, removed and retrofitted be so that the circuit board inserted into a device does not need to be removed from this.

So that both insertion and fastening mechanisms are safe Ensure the holder of the socket can be in training the invention initially provided for the locking mechanism be that the locking arms on the frame are diametrically opposed to each other opposite, spaced from the contact arms and are essentially congruent and resiliently in the locking position when the socket is inserted snap and the opening at appropriately narrowed areas reach behind on the edge. This training means for practice, that the frame is simply in the opening in the appropriate version, which is narrowed by the Ranges is specified, is clipped in after clipping in, the lamp is already fully contacted and is ready to use. According to the version a substantially hollow cylindrical shape, the locking arms provided with locking projections either by incisions in the cylinder wall or, as an alternative solution, of angled by an essentially 180 ° bend and essentially parallel to the socket wall Legs are formed.

Furthermore, according to the invention, those provided with locking projections Latching arms can be designed as metal arms, which is equally the case can apply to the contact arms according to the invention are designed as metal metal contact springs. Both the metal contact arms and the metal contact springs are separated in shots formed on the frame attached and are especially for larger dimensions Sockets with regard to the stability of the attachment and the spring force exerted is an advantage. If the socket is to be inserted in a circuit board, on which conductor tracks run above and below the board, can be provided in a further embodiment of the invention be that a metallic locking arm and a metallic Contact arm are connected to each other in such a way that conductor tracks arranged on both sides of the circuit board on one side of the contact arm and on the other side of the locking arm are contactable, it being useful here has highlighted when the locking arm and the contact arm designed according to the invention as a one-piece contact spring are. This embodiment according to the invention can be advantageous regardless of the side arrangement of the conductor tracks can be used universally because of the possibility of contacting on both sides it is definitely guaranteed that, whether on the top, bottom or both sides, in any case contacting is guaranteed.

In order to ensure the safe functioning of the rotating mechanism, can be provided in a further embodiment of the invention be that to limit the insertion movement before Twist diametrically opposite each other on the frame and spaced and offset from the contact arms Rag are formed after performing the contact arms through the edge extensions of the Opening on reaching the twist position on the circuit board attack. The insertion process is thus carried out by these tabs designed particularly simple because of the frame simply up to the tab on the PCB inserted and then since they are already in the right one Position, simply twisted in contact position is, the twist angle according to the invention 30 ° to 40 °, in particular 35 °. In order to achieve the Keep the frame dimensions as small as possible so that the Socket can also be used in the tightest of spaces be provided in a further embodiment of the invention, that indentations are formed on the socket, in which the lobes are placed inwards so that these only insignificantly about the outer diameter of the cylindrical Protruding socket body. According to the invention be provided that the lobes are arranged in this way are that they are in contact with the version of the extensions the opening are congruent so that they with particular advantage cover these extensions and so reduce the passage of light through these extensions.

In order to determine the contact position for each insertion mechanism, thus avoiding incorrect, contactless insertion is in a further embodiment of the invention a detent formed on the socket may be provided, the in contact position in a bulge on the edge of the Opening engages. So is the version by means of the machine clipped into the opening, so the latch is provided the frame orientation is correct, in the bulge be introduced. If this is not the case, the latch is in place on the circuit board and the socket can not be clipped in, so that incorrect insertion is avoided becomes. This is the version against unintentional Twisted secured. If the socket is screwed into the opening, the noticeable snapping of the Latch in the bulge the contact position of the socket displayed.

This ensures that the lamp connection wires are always contacted securely due to the different stresses the various insertion mechanisms are guaranteed, can also be provided according to the invention that everyone laterally projecting contact arm with an essentially trained end, receiving the lamp lead wire Clamping groove of smaller diameter than the diameter of the lamp wire is provided, so that a secure fixation the wire on the contact arm is guaranteed and a Loosen the wire even when turning the socket, where the Wire grinds on the plate surface, advantageously avoided becomes. In addition, this contact arm with a Entry slope to determine the correct direction of insertion be provided when the lamp is replaced. To both construction height as low as possible and as high as possible To be able to realize the degree of illumination can be further Invention design be provided that the preferably arranged lying incandescent area the frame is designed as a reflector.

Fig. 1

eine Aufsicht auf eine der Fassung angepaßte Öffnung der Leiterplatte,

Fig. 2

eine teilweise bereits in die Öffnung aus Fig. 1 eingesetzte, bereits mit einer Lampe versehene Fassung,

Fig. 3

die vollständig in die Öffnung eingesetzte Fassung aus Fig. 2,

Fig. 4

eine um 90° gedrehte Ansicht der Fassung aus Fig. 3,

Fig. 5

eine unterseitige Aufsicht der Fassung,

Fig. 6

eine Aufsicht auf die Fassung aus Fig. 3,

Fig. 7

die Aufsicht aus Fig. 6, teilweise im Schnitt,

Fig. 8

eine Aufsicht auf die Fassung aus Fig. 6 in um den Verdrehwinkel verdrehter Einsetz- bzw. Entnahmestellung,

Fig. 9

eine in eine Leiterplattenöffnung eingesetzte Fassung einer zweiten Ausführungsform, teilweise im Schnitt,

Fig.10

die Fassung aus Fig. 9 in um 90° gedrehter Ansicht, und

Fig.11

eine Aufsicht auf die Fassung aus Fig. 9.

Further advantages, features and details of the invention result from the exemplary embodiment described below and from the drawings. Show:

Fig. 1

a top view of an opening of the printed circuit board adapted to the socket,

Fig. 2

1, a socket already partially inserted into the opening from FIG. 1 and already provided with a lamp,

Fig. 3

the version completely inserted into the opening from Fig. 2,

Fig. 4

3 shows a view of the socket from FIG. 3 rotated by 90 °,

Fig. 5

an underside supervision of the version,

Fig. 6

3 shows a top view of the frame from FIG. 3,

Fig. 7

6, partly in section,

Fig. 8

6 is a top view of the socket from FIG. 6 in the insertion or removal position rotated by the angle of rotation,

Fig. 9

a version of a second embodiment inserted into a circuit board opening, partly in section,

Fig. 10

9 in a view rotated by 90 °, and

Fig. 11

a top view of the version of FIG. 9.

Fig. 1 shows an opening made on a circuit board 1 2, which is substantially circular in shape and diametrically opposite extensions 3 and these extensions are also offset from one another has diametrically opposite narrowed areas 4. These narrowed areas 4 close on the Top of the circuit board 1, the contact surfaces 5 on which the lamp lead wires 6 (see FIG. 2) one in the opening 2 to be inserted version 7 in contact position attack. In addition, the opening 2 has a bulge 8 on that for the inclusion of a later to be described Locking lug serves to determine the contact position.

Fig. 2 now shows the version 7 according to the invention, the an essentially hollow cylindrical socket body 9 has in its upper area to accommodate the im Embodiment shown arranged small incandescent lamp 10 is designed as a reflector, which by the trough-shaped recess 11, which is used to increase the reflectance for example, be mirrored or white Material, especially plastic, can exist. The Lamp wires 6 are arranged on the socket body 9 Contact arms 12 guided such that they are in the inserted state place the socket 7 on the contact surfaces 5, whereby the guidance or attachment of the lamp wires 6 to the Contact arms 12 will be described later. At the Underside of the socket body 9 are two diametrically opposed to each other opposite locking arms 13 resiliently attached in the presence of legs 14, which are due to an im substantially 180 ° bend substantially parallel extend to the socket wall, are formed. The However, locking arms can also be made by making simple incisions in the cylinder wall. At the top ends the locking arms 13 are projections 15 formed in the inserted Condition (see Fig. 3) on the underside of the circuit board Attack 1. They are also limited the lateral spring movement of the locking arms 13 in the area of Projections 15 further, bead-like projections 16 are formed, the in contact position on the inside of the narrowed Areas 4 of the opening 2 are in contact and thus spring further prevent the locking arms 13.

Fig. 3 now shows the version 7 of Fig. 2 in its inserted Contact position. The locking arms reach behind 13 in a manner known per se and the circuit board of the contact arms spring-mounted on the socket body 9 12 counter-mounted, so that the socket 7 securely in the opening 2 is fixed. 3, then lie the lamp lead wires 6 on the circuit board 1 and thus on the contact surfaces 5.

The view rotated by 90 ° in FIG. 4 is furthermore the latch 21 formed on the socket body 9 remove that in the contact position shown in the Bulge 8 of opening 2 engages and so as assembly coding and security against rotation. Furthermore, it is on everyone Contact arm 12 provided insertion slope 22 shown, which the determination of the correct direction of rotation when Lamp replacement is used. 3 that on the socket body 9 two projecting perpendicular to the socket body 9 Lobes are formed, which, in particular 5, diametrically opposite one another are arranged and which serve as limiting tabs for the insertion movement, which takes place within the framework of the twisting mechanism, if the socket 7 from the other side into the circuit board 1 should be used or removed. These tabs 17, which are shown in FIGS Einclipsweise shown through the opening 2 of the circuit board 1 must be passed are in the Version 7 trained indentations 18 offset inwards arranged. In addition, they are among the contact arms 12 staggered so that, as in particular the supervision from Fig. 6 can be seen when clipping passed through the extensions 3 of the opening 2 and, after locking, to these extensions 3 are partly congruent and thus the Reduce the passage of light through them. On the real one The function of the tabs 17 will be described later with reference to FIG. 8 discussed in more detail.

6 also shows the specific already mentioned Formation of the contact arms 12 for the purpose of fastening the lamp connecting wires 6. Each contact arm has 12 in its end area an outward increasing Groove recess 19, the diameter of which is somewhat in the bottom of the groove is less than the diameter of the lamp wire 6, so that this is held clamped. The lamp lead wire 6 by two bends that are essentially 90 ° from the top through the groove 19 to the bottom and thus to the contacting page, like the previous ones Figures can be seen.

7, which is a partial section through the socket 7 shows, further details regarding the construction, in particular can be seen in the area of the locking arms 13. To one to ensure sufficient suspension of the locking arms 13, has the socket 7 in the parallel to the locking arm 13 Wall area a recess 20 so that the arm 13 of the socket wall to ensure adequate Travel is sufficiently spaced.

From Fig. 8 the function of the twisting mechanism and the lobe 17 clearly. Starting from that shown in Fig. 6 Contact position by clipping on the top of the plate has been reached, the version 7 on the on the other side of the circuit board the socket 7 from its contact position, in which first of all the extensions 3 performed flap 17 to these congruent lie by a predetermined angle of rotation α, the in the exemplary embodiment shown is 35 °, if rotated, until the contact arms 12 are congruent with the extensions 3, however, run on top of the circuit board. For The socket 7 is then simply removed from the opening 2 pulled out, the contact arms 12 through the extensions 3 are passed through. For retrofitting a new one Version 7 is now reversed. The version 7 is so far in the opening 2 by performing the Contact arms 12 inserted through the extensions until the tabs 17 rest on the underside of the circuit board 1 and limit the insertion movement. Only then does the Rotation through the angle α to the socket in contact position bring, the contact position when the Latch 21 in the bulge 8 is reached. The rags 17 are then essentially congruent with the Extensions 3. In addition to such, on the insertion side however, averted removal is also a removal Version 7 possible on the clip-in side, for which only the locking arms 13 from their locking position (see Fig. 3) must be pressed inwards into the recess 20, after which the version 7 with the implementation of the rag 17th can be removed by extension 3.

FIGS. 9 to 11 show a further embodiment the version of the invention in detail. The are on one contact side required contact arm and the locking arm formed by a one-piece metal spring 23, that by means of a tab 24 in one on the socket body trained receptacle 25 is attached. With this one-piece contact spring 23 it is thus possible in the case of conductor tracks running on the top and / or bottom these either on the top, bottom or both sides to be able to contact, so that this embodiment for any type of circuit board can be used since one Contacting is always guaranteed. The lamp lead wires 26, which are somewhat shortened here thereby on the contact spring 23 in the region of the contact arm 27 welded or soldered. The resilience of the locking arms 28 is by appropriate bending of the contact spring in the lower Area created. So on the one hand a safe and firm locking within the opening is guaranteed, on the other hand, a sufficiently large one on the underside conductor track attacking contact surface of the locking arm 28 is present is, this is in the end area as a locking and contact projection 29 curved, with the Projection 29 connects a section 30 limiting the spring travel. From the side view of Fig. 10, the Attachment serving tab 24 clearly through incisions and bending is formed and into the corresponding Recess 25 is inserted and possibly glued.

10 also shows that formed on the contact arm 27 Chamfer 31.

11 finally shows a top view of the version of the second embodiment, from which the formation of the Contact arms 27 becomes clear. In contrast to the contact arms of the first embodiment, no end Grooves open, but are closed. This is because not for contacting the lamp lead wires 26 must be led down, but a fastening of the same on the upper side of the contact arms 27 is sufficient since the actual Contacting yes through the metal contact arms 27 he follows.

Claims (17)

1. Holder for a small incandescent lamp for detachable and fixable insertion into an aperture (2), which is adapted to the holder (7) and is provided with peripheral widenings, in a printed circuit (1) and contacting of the lamp (10) by pressing of the lamp connecting wires (6, 26) guided on contact arms (12, 27) against the strip conductors (5) of the printed circuit (1), wherein for insertion and fixing of the holder a clamping rotation mechanism is provided, an insertion locking mechanism additionally being provided on the holder (7), by means of which locking mechanism the holder is insertable so as to be held from one side of the printed circuit (1), wherein resilient locking arms (13, 28) formed on the holder (7), upon reaching of the final insertion position, snap into a locked position with simultaneous abutment of the locking arms (13, 28), due to the contact arms (12, 27) which are axially resilient parallel to the holder longitudinal axis, against the other side of the printed circuit (1), and wherein the holder (7), upon actuation of the rotation mechanism, is insertable from the other side of the printed circuit, the holder (7) being held in the final insertion position by the locking arms (13, 28) not passing through the printed circuit aperture during insertion and rotation and the resilient contact arms (12, 27) abutting the same, so that the holder is insertable and removable with respectively the same lamp orientation from both sides.
2. Holder according to claim 1, characterised in that the locking arms (13, 28) are formed on the holder (7) so as to be diametrically opposite, spaced from the contact arms (12, 27) and so as to extend substantially congruently and engage under the edge of the aperture (2) at correspondingly narrowed places (4).
3. Holder according to claim 1 or 2, characterised in that in order to define the insertion movement before rotation in the frame of the rotation mechanism, lobes (17) are formed on the holder (7) diametrically opposite one another and with clearance from the contact arms (12, 27) and offset, and after passing of the contact arms (12, 27) through the peripheral widenings (3) of the aperture (2) upon reaching the rotated position act on the printed circuit (1).
4. Holder according to one of the preceding claims, characterised in that the holder (7) has a substantially hollow cylindrical form and the resilient locking arms (13) provided with locking projections (15, 16) are formed by cut-outs in the cylinder wall.
5. Holder according to one of the preceding claims, characterised in that the locking arms (13) provided with locking projections (15, 16) are formed of flanges (14) angled by bending through substantially 180° and extending substantially parallel to the holder wall.
6. Holder according to one of the preceding claims, characterised in that the locking arms provided with locking projections are formed as metal arms to be mounted on the holder in seats formed thereon.
7. Holder according to one of the preceding claims, characterised in that the contact arms are formed as metal contact springs to be mounted on the holder in seats formed thereon.
8. Holder according to claim 6 and 7, characterised in that a respective metal locking arm (28) and a metal contact arm (27) are so connected together that strip conductors disposed on either side of the printed circuit are contactable on one side by the contact arm (27) and on the other side by the locking arm (28).
9. Holder according to claim 8, characterised in that the locking arm (28) and the contact arm (27) are formed as a one-piece contact spring (23) which is mounted in a seat (25) on the holder.
10. Holder according to one of claims 3 to 9, characterised by notches (18) formed in the holder (7), in which the lobes (17) are disposed, set inward.
11. Holder according to one of claims 3 to 10, characterised in that the lobes (17) are so arranged that they extend substantially congruently with the widenings (3) in the contact position of the holder (7).
12. Holder according to one of claims 3 to 11, characterised in that the angle of rotation (α) is 30° to 40°, preferably 35°.
13. Holder according to one of the preceding claims, characterised by a locking lug (21) formed on the holder (7), which engages in a peripheral convexity (8) of the aperture (2) in the contact position.
14. Holder according to one of the preceding claims, characterised in that each laterally projecting contact arm (12) is provided with a clamping groove (19) of smaller diameter than the diameter of the lamp connecting wire (6), which receives the lamp connecting wire (6).
15. Holder according to one of the preceding claims, characterised by an insertion slope (22, 31) formed on the contact arm (12, 27).
16. Holder according to one of the preceding claims, characterised in that the region of the holder (7) which receives the incandescent lamp (10) preferably in a lying position is formed as a reflector (11).
17. Holder according to one of the preceding claims, characterised in that the holder (7) is formed in one piece, in particular from plastics material.

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