EP4113757A1 - Lamp socket with lamp retaining clip - Google Patents

Abstract

Lamp socket (13), with a socket stone (14), - a base receptacle (34) for a lamp socket (21) on the top of the socket stone (14), - connection contacts (18) for external power supply connection conductors on the underside of the socket stone (14) - a retaining clip (39), by means of which the lamp base (21) can be anchored in the base receptacle (34), - two receiving gaps for the lamp base (21) between forming spring legs (38) of the retaining clip (39), each of which has a have a free end of the spring leg and one end connected to a holding leg and are seated in the socket receptacle (34), with - the holding leg being arranged on the upper side of the setting stone (14) and - the free ends of the spring legs (38) pointing in the direction of the underside of the setting stone (14 ) pointingly seated in the base receptacle (34), and wherein- the retaining clip (39) is part of a fastening ring (15) fixed to the setting inlay (14) and surrounding the base receptacle (34), and- the setting inlay (14) on its upper side has a formed by a wall surrounded lamp holder, whose bottom forms the base receptacle (34).

Description

• mit einem Fassungsstein,
• mit einer Sockelaufnahme für den Sockel einer Lampe, gebildet auf der Oberseite des Fassungssteins,
• mit Anschlusskontakten für externe Anschlussleiter der Spannungsversorgung auf der Unterseite des Fassungssteins,
• mit einer Halteklammer, mittels derer der Sockel einer Lampe in der Sockelaufnahme verankerbar ist,
• mit zwei einen Aufnahmespalt für den Lampensockel zwischen sich bildenden Federschenkeln der Halteklammer, die jeweils ein freies und ein an einem Halteschenkel angebundenes Federschenkelende aufweisen und in der Sockelaufnahme einsitzen.

The invention relates to a lamp socket, in particular for cooking appliance lights, such as G9 lamp sockets,

• with a setting stone,
• with a base receptacle for the base of a lamp, formed on top of the socket stone,
• with connection contacts for external connection conductors of the power supply on the underside of the socket stone,
• with a retaining clip, by means of which the base of a lamp can be anchored in the base receptacle,
• with two a receiving gap for the lamp base between forming spring legs of the retaining clip, which each have a free spring leg end and a spring leg end connected to a retaining leg and are seated in the base receptacle.

Generic lampholders are, for example, from EP 1 811 227 well known and widely used in particular to illuminate cooking appliance interiors.

Lamp holders of this type have proven themselves in the prior art and are still widely used as part of cooking appliance lights despite the advent of LED technology. Last but not least, this is due to the comparatively low temperature sensitivity of the light source as well as to the established and inexpensive components and production methods.

Nevertheless, efforts are being made to further simplify the manufacture of generic lamp sockets.

From the WO 2010/023682 A1 a car lamp is known, in which the connection between the lamp and lamp base by a Plug-in process is made. The lamp has latching projections, which are gripped behind by retaining springs pointing in the direction of insertion.

In the EP 1 435 636 A2 a G9 lamp is shown with a protective glass covering the lamp. The protective glass is snapped onto a ring element, which in turn is held on the lamp base of the G9 lamp by snap-in legs.

• der Halteschenkel an der Oberseite des Fassungssteins angeordnet ist und
• die freien Enden der Federschenkel in Richtung der Unterseite des Fassungssteines weisend in der Sockelaufnahme einsitzen
• die Halteklammer Teil eines Befestigungsringes ist, der am Fassungsstein festgelegt ist und die Sockelaufnahme umgibt,
• der Fassungsstein an seiner Oberseite eine von einer Wand umgebene Lampenaufnahme ausbildet, deren Boden die Sockelaufnahme bildet.

The object of the invention is achieved first of all by a lamp holder with the features of claim 1, in particular with its characterizing features, after which

• the holding leg is arranged on the upper side of the setting stone and
• the free ends of the spring legs are seated in the base receptacle pointing in the direction of the underside of the setting stone
• the retaining clip is part of a fastening ring that is fixed to the setting stone and surrounds the socket receptacle,
• the socket stone forms a lamp mount surrounded by a wall on its upper side, the base of which forms the base mount.

The essential advantage of the invention lies in the fact that the retaining clip previously inserted into the setting stone from below is now inserted into the setting stone from the upper side.

As a result, free space is created on the underside of the socket stone, which is comparatively tight there due to the seated connection contacts. As the description of an exemplary embodiment will show below, this results in design freedom in the area of the underside of the socket stone, which can be used, for example, for optimized base ventilation of the lamp seated in the socket.

Such fastening rings are also well known from the aforementioned prior art. In conjunction with a mounting flange, they serve to fix the light socket in the recess of a cooking chamber wall. To this end, the wall of the cooking space is accommodated between the mounting flange and a counter bearing, usually a detent spring. If the retaining clip is now part of this fastening ring, this reduces the number of components to be assembled. This lowers the manufacturing costs and simplifies the manufacturing processes.

It is envisaged that the setting stone forms a fastening contour on its upper side for the holding leg fixing the spring leg to the setting stone, in particular if each spring leg is connected to a holding leg, the fastening contour is a holding slot worked into the top side towards the underside of the setting stone, the holding slot next to it the base receptacle is arranged.

In this embodiment, the invention proposes fixing each spring leg separately in the setting stone, with the holding legs of each spring leg being fixed in the fastening contour in a non-positive manner, but preferably in a form-fitting manner.

Provision can certainly be made for the spring legs to be connected to the fastening ring only for the assembly process and to be separated from the fastening ring in a further assembly step using a suitable tool in order to avoid an electrically conductive connection between the spring legs of the retaining clip and the fastening ring. During such a release process, the tool can anchor the holding leg in a non-positive or positive manner in corresponding fastening contours of the setting stone, for example by means of a material deformation.

However, it is also conceivable that the spring legs connected to the retaining ring are equipped with retaining arms which are anchored positively or non-positively in fastening contours when the fastening ring is inserted on the setting stone. For separation, existing material bridges are then severed between the spring legs and/or retaining legs and the fastening ring.

Electrical safety can be supplemented or alternatively created by providing the fastening ring with a protective conductor connection.

It is envisaged that the socket stone forms a lamp receptacle surrounded by a wall on its upper side, the bottom of which forms the socket receptacle, especially if the wall forms fixing cavities on its inner surface, into which fixing lugs of the fastening ring engage.

With the help of the fixing cavities, into which the fixing lugs of the fixing ring engage, the fixing ring can be fixed to the setting stone in a particularly simple and permanent manner as well as with stable force.

It is also provided that the wall has latching openings through which latching wings of the fastening ring pass and that the wall forms a mounting flange, with a cooking chamber wall being able to be arranged between latching wings and mounting flange to hold the socket.

A further reduction in components is achieved if the fastening ring carries at least one holding means for a lamp glass, it being provided that the holding means is a bayonet projection.

• Fig. 1 Explosionsdarstellung einer Gargeräteleuchte mit erfindungsgemäßer Lampenfassung,
• Fig. 2 der Befestigungsring der in Figur 1 dargestellten Lampenfassung in Perspektive,
• Fig. 3 der Befestigungsring nach Figur 2 in Ansicht von oben,
• Fig. 4 der Befestigungsring gemäß Figur 3 in Schnittdarstellung gemäß Schnittlinie IV-IV in Figur 3,
• Fig. 5 eine Seitenansicht der erfindungsgemäßen Fassung,
• Fig. 6 eine Schnittdarstellung der Lampenfassung gemäß Schnittlinie VI-VI in Figur 5,
• Fig. 7 die Darstellung gemäß Figur 6 mit eingesetzter Lampe,
• Fig. 8 die Darstellung der erfindungsgemäßen Lampenfassung in Ansicht auf ihre Oberseite und
• Fig. 9 die Darstellung der erfindungsgemäßen Lampenfassung in Ansicht auf ihre Unterseite.

Further advantages of the invention and a better understanding follow from the following description of an exemplary embodiment. Show it:

• 1 Exploded view of a cooking appliance light with a lamp socket according to the invention,
• 2 the fastening ring of the in figure 1 shown lamp holder in perspective,
• 3 the fastening ring figure 2 in top view,
• 4 the mounting ring according to figure 3 in sectional view according to section line IV-IV in figure 3 ,
• figure 5 a side view of the socket according to the invention,
• 6 a sectional view of the lamp socket according to section line VI-VI in figure 5 ,
• 7 the representation according to figure 6 with inserted lamp,
• 8 the representation of the lamp holder according to the invention in view of its top and
• 9 the representation of the lamp holder according to the invention in view of its underside.

In the figures, a cooking appliance light is given the reference number 10 as a whole.

The cooking appliance light 10 is in figure 1 shown in an exploded view and includes a lamp glass 11, a lamp 12, designed here as a G9 lamp, and a lampholder, generally designated 13.

The lamp socket 13 is initially formed by a socket stone 14 which carries a fastening ring 15 , holds a protective conductor connection 16 and socket contacts 17 and connection contacts 18 .

In this case, the fastening ring 15 and the protective conductor connection are arranged on the upper side of the setting stone 14 . The socket contacts 17 and the connection contacts 18 are accommodated in sockets 19 on the underside of the socket stone 14 .

The lamp 12 has a lamp bulb 20 and a lamp base 21 adjoining it, the latter carrying two base contacts 22 .

the figures 5 , 8th and 9 show the setting stone 14. figure 5 shows a side view, figure 8 a view from above and figure 9 a view of the underside of the setting stone 14.

Out of figure 5 it can be seen that the setting stone 14 has two sockets 19 on its underside. A ventilation gap 23 is formed between these connecting pieces 19 , which enables cooling of a lamp base 21 inserted in the socket insulator 14 . Regarding the drawing level of figure 5 The protective conductor connection 16 can be seen behind the socket 19, which is inserted into the socket stone 14 from the top.

The socket stone 14 forms a socket base 24 from which the sockets 19 extend in the direction of the underside and on which an annular wall 25 is placed in the opposite direction, which carries a mounting flange 26 at its upper end.

Vertically between the mounting flange 26 and the base 24 of the socket, the annular wall 25 surrounds a receiving space 27 in which the fastening ring and the lamp 12 are seated and which accommodates the light collar 28 used to fix the light glass 11 on the socket stone 14 .

figure 1 shows in connection with figure 5 that the annular wall 25 has detent spring openings 29 in two diametrically opposite sections, from which detent springs 30 of the fastening ring 15 emerge.

figure 8 shows a view from above of the setting stone 14, ie a view of the top of the setting base 24. It is off figure 8 It can first be seen that the mounting flange 26 surrounds an insertion opening 31 through which the receiving space 27 is accessible, whereas the socket base 24 delimits this receiving space at the bottom. The annular wall 25 of the socket stone 14 has, in addition to the detent spring openings 29 in a circumferential angle offset by 90°, two diametrically opposite grooves 32, in which the fastening arms 33 for holding the lamp glass 11 are inserted.

A base receptacle 34 is worked into the base 24 of the socket, which extends like a blind hole in the direction of the underside of the socket and into which the lamp base 21 of the lamp 12 is to be inserted. The base receptacle 34 has an approximately rectangular cross section and is enclosed by two end walls 35 lying opposite one another and two transverse walls 36 likewise lying opposite one another. The transverse walls 36 each have a spring opening 37 which is arranged approximately in the middle of each transverse wall 36 and is used to guide a spring leg 38 of a retaining clip 39 in each case.

The respective spring opening 37 merges into a storage bay 40 . A storage bay 40 has a protective conductor receptacle 41 through which the protective conductor connection 16 is inserted and in which it is held. Part of each bearing bay 40 is a slot receptacle 42 parallel to the transverse wall. One of the bearing bays 40 contains a stabilizing pin 43 projecting in the direction of the upper side, the function of which will be explained later.

In view of the underside of the setting stone 14 in figure 9 First of all, the sockets 19 can be seen, which protrude from the underside of the socket base 24 in the direction of the viewer. Each connecting piece 19 is provided with a contact cavity 44 in which connection and socket contacts 18, 17 (not shown here) are arranged.

The ventilation gap 23 extending between the sockets 19 also comes into its own in this illustration.

Based figure 9 It is particularly clear that the detent springs 30 extend outwards through the detent spring openings 29 and project outwards relative to the annular wall 25 so that they are arranged below the mounting flange 26 . ultimately shows figure 9 another coding rib 45, which is arranged on the outer circumference of the ring wall 25 and serves to align the setting stone 14 in the correct position in a cooking chamber wall. The seated in the socket stone 14 spring leg 38 of the fastening ring 15 extend with their free ends within the base receptacle 34 to the underside of the socket stone 14, ie towards the viewer figure 9 and are in the area of the ventilation gap 23 within the base receptacles 34 in figure 9 to recognize.

the Figures 2 to 4 now show the fastening ring 15 in different views. figure 2 is a perspective view of the Top of mounting ring 15. figure 3 12 is a top view of the attachment ring 15, whereas figure 4 a sectional view according to section line IV-IV in figure 3 represents.

The fastening ring 15 initially includes a base plate 46, which with its in the figures 2 and 3 from the viewer groundbreaking underside faces the base 24 and rests on the same. The base plate 46 has a central recess 47 which, when mounted in the correct position in the socket insulator 14, is aligned with the base receptacle 34 and through which the lamp base 21 can be inserted into the base receptacle 34.

In the present embodiment of the invention, the retaining clip 39 is integrated into the fastening ring 15, so that the base plate 46, to which the spring legs 38 of the retaining clip 39 are connected, assumes the function of the retaining leg.

Each spring leg 38 is connected to a stabilizing web 48 which is bent away from the base plate 46 in the direction of the underside of the setting stone 14 and is aligned transversely parallel to the respective adjacent transverse wall 36 of the base receptacle 34 .

The detent springs 30 of the fastening ring 15 and the fastening arms 33 for holding the lamp glass 11 are then each formed on the outer circumference of the base plate 46 . In addition, the outer edge of the fastening ring 15 carries on the right and left of a fastening arm 33 fixing lugs 49 figure 1 shows. Elasticity cuts 51 are introduced into the base plate 46 in each case between a fixing lug 49 and the adjacent fastening arm 33 in order to increase the spring deflection of the fastening arm 33, which advantages offers with regard to the attachment of the lamp glass 11, which, however, should not be explained further here.

In particular based on the sectional view figure 4 it is once again made clear that the spring legs 38 extend from the base plate 46 of the fastening ring 15 in the direction of the underside of the setting stone and the stabilizing webs 38 are also formed from the base plate 46 in the direction of the underside of the setting stone 14 .

In contrast, both the detent springs 30 and the fastening arms 33 and finally the fixing lugs 49 point in the opposite direction and also have their respective origins on the base plate 46.

the figures 6 and 7 , Sectional representations of the setting stone 14 according to section line VI-VI in figure 5 show the introduced into the receiving space 27 of the socket stone 14 fastening ring 15, in the case of figure 7 adding lamp 12.

The fastening ring 15 is pushed into the receiving space 27 of the setting stone 14 from the top side of the setting, with the fastening arms 33 having the grooves 32 ( figure 8 ) and the detent springs 30 with the detent spring openings 29 ( figure 8 ) are aligned. While the fastening arms 33 are only seated in the grooves 32 with a friction fit, the detent springs 30 engage through the associated detent spring opening 29 and thus support a form-fitting fixing of the fastening ring 15 in the setting block 14. However, the fastening ring 15 is actually fastened by the interaction of the fixing lugs 49 with the fixing cavities 50, into which the former engage and thus ensure a form-fitting mounting of the fastening ring 15 in the setting stone 14. the Spring legs 38 reach through the respective spring opening 37 of each transverse wall 36 into the base receptacle 34 and point with the respective free end of the spring leg in the direction of the underside of the socket insulator 14 or the underside of the lamp socket 13.

The stabilizing webs 48, to which the spring legs 38 are connected, sit in the respectively associated slot receptacle ( figure 8 ), where with regard to the viewing level of the figures 6 and 7 right stabilizing bar 48 on the stabilizing pin 43 is supported. A stabilizing pin 43 was dispensed with in the case of the left-hand stabilizing web 48 , since in the present exemplary embodiment it is supported against the protective conductor connection 16 , which here assumes the function of the stabilizing pin 43 .

In the figure 7 The lamp 12 additionally shown now shows the effect of the retaining clip 39 with its spring legs 38. The lamp base 21 inserted into the base receptacle 34 spreads the spring arms outwards, the resilience of which applies a force directed against the base and snaps behind base ribs 52 formed on the base. In this way, protection against the lamp 12 falling out is achieved. figure 7 also illustrates the function of the stabilizing pin 43 and stabilizing web 48. The outward spreading forces of the lamp base 21 are intercepted by the stabilizing pin 43, so that the spring legs 38 can apply high pressure forces to the lamp base 21 in order to anchor it securely in the lampholder 14. In the case of regarding the drawing planes of figures 6 and 7 On the left-hand side stabilizing web 48, the function of the stabilizing pin 43 is taken over by the protective conductor connection 16, which, however, is merely an advantageous development of this specific embodiment. It is easily conceivable to add a stabilizing pin 43 there as well to be provided and to ensure the electrical contact of fastening ring 15 and protective conductor connection 16 in a different way.

From what has been described, it is readily apparent that the changed arrangement of the retaining clip 39 initially creates space on the underside of the base, since only the socket and connection contacts 17, 18 still have to be arranged there. At the same time it has become apparent that the altered arrangement of the retaining clip 39 enables improved ventilation of the lamp base 21 by introducing a ventilation gap 23 in the underside of the socket, which increases the service life of the lamp 12, particularly under the extreme temperatures in cooking appliances.

The integration of the retaining clip 39 in the fastening ring 15, which is known and required in various forms for generic sockets, leads to a reduction in components, which simplifies manufacture and assembly.

Various modifications of the invention are readily conceivable on the basis of the drawings. Thus, the fastening clip 39 can also be inserted into the setting stone 14 from above without being part of a fastening ring 15 . The base plate 46 of the fastening ring 15 would be correspondingly reduced in diameter and would not have any additional components such as detent springs 30 and fastening arms 33 . It would then contain only the spring legs 38, which do not even necessarily have to be arranged on the base plate 46 via stabilizing webs 48, but could be arranged thereover.

It is also conceivable to resolve the retaining clip 39 as an overall component. One can well imagine that ever a stabilizing bar 48 carries a spring leg 38 and this - without the other parts of the fastening ring 15 and also without a base plate 46 - are inserted into the slot receptacles 42 and anchored there in a positive or non-positive manner. The advantageous rearrangement of the retaining clip 39 would be retained even if the reduction in components is not realized as a result.

Finally, it is conceivable to maintain the retaining clip 39 as an integration into the fastening ring 15 and to mount the fastening ring 15 as described above. In a second work step, however, the connection between the base plate 46 and the spring legs 38 can then be separated, for example by separating the stabilizing webs 48 from the base plate 46, in which case these are then to be held in the socket stone 14 in a positive or non-positive manner. In this way, the electrical safety can be further improved—in particular if a protective conductor connection 16 is dispensed with.

Overall, the invention therefore shows an advantageous redesign of a lamp socket for a cooking appliance, in particular a G9 lamp socket, as is often used in cooking appliances such as ovens, steam cookers, microwaves, etc.

reference list

10

cooking appliance light

11

lamp glass

12

lamp

13

lamp socket

14

setting stone

15

mounting ring

16

protective conductor connection

17

socket contact

18

connection contact

19

Support

20

lamp bulb

21

lamp base

22

socket contacts

23

ventilation gap

24

base

25

ring wall

26

mounting flange

27

recording room

28

lamp collar

29

detent spring breakthrough

30

detent spring

31

insertion hole

32

groove

33

mounting arm

34

base mount

35

bulkhead

36

bulkhead

37

spring breakage

38

feather leg

39

retaining clip

40

stock bay

41

protective conductor recording

42

slot recording

43

stabilizing pivot

44

contact cave

45

coding rib

46

base plate

47

central recess

48

stabilization bar

49

fixation nose

50

fixation caves

51

elasticity cut

52

base rib

Claims (7)

Lamp socket (13), in particular for cooking appliance lights (10), such as G9 lamp sockets, - with a setting stone (14), - With a base receptacle (24) for the base of a lamp (12), formed on the top of the socket stone (14), - with connection contacts (18) for external connection conductors of the power supply on the underside of the socket stone (14), - with a retaining clip (39), by means of which the base of a lamp (12) can be anchored in the base receptacle (34), - with two a receiving gap for the lamp base (21) between forming spring legs (38) of the retaining clip (39), which each have a free spring leg end and a spring leg end connected to a retaining leg and are seated in the base receptacle (34), characterized in that - the holding leg is arranged on the upper side of the setting stone (14) and - the free ends of the spring legs (38) are seated in the base receptacle (34) pointing in the direction of the underside of the setting stone (14), - the retaining clip (39) is part of a fastening ring (15) which is fixed to the setting stone (14) and surrounds the base receptacle (34), - The socket stone (14) forms on its upper side a wall-enclosed lamp holder, the bottom of which forms the base holder (34). Lamp socket (13) according to Claim 1, characterized in that the socket block (14) forms on its upper side a fastening contour for the retaining leg fixing the spring leg (38) to the socket block (14). Lamp socket (13) according to Claim 2, characterized in that each spring leg (38) is attached to a holding leg, the fastening contour is a holding slot worked into the upper side in the direction of the underside of the socket insulator (14), the holding slot is arranged next to the base receptacle (34). is. Lamp socket (13) according to Claim 1, characterized in that the wall forms fixing cavities on its inner surface, into which fixing lugs of the fastening ring (15) engage. Lamp socket (13) according to Claims 1 and 4, characterized in that the wall has locking spring openings (29) through which locking wings of the fastening ring (15) pass and in that the wall forms a mounting flange (26), with a cooking chamber wall between locking wings and mounting flange (26) for holding the socket (13) can be arranged. Lamp socket (13) according to Claim 1, characterized in that the fastening ring (15) carries at least one holding means for a lamp glass (11). Lamp holder (13) according to claim 6, characterized in that the retaining means is a bayonet projection.

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