GARDEN APPLIANCE LIGHT

Description

[0001] The invention relates to a kitchen appliance light, comprising a light source formed by a circuit board with an LED arranged on it, a light guide rod having a light entry surface for the light emitted by the LED, a holder having a circuit board receptacle on a bottom side and a fixing element for receiving the light guide rod on a top side opposite the bottom side, and an opening in the holder in the area of ​​the fixing element through which the emitted light from the LED arranged on the bottom side passes to the light guide rod arranged on the top side.

[0002] A luminaire of this type is shown in the applicant's German patent application DE 20 2020 101 157 U1. In this application, a light guide rod is inserted into a fixing element designed as a sleeve. The light guide rod has a relief cut on its outer circumference. Depending on the embodiment, locking elements of varying designs engage in this relief cut and thus anchor the light guide rod to the holder. For example, the publication proposes spring clips or locking tabs as locking elements. In this way, a positive locking connection of the light guide rod within the fixing element of the holder is achieved.

[0003] German patent application DE 10 2018 111 092 A1 discloses a similarly constructed luminaire in which the light guide rod is also seated in a sleeve-shaped fixing element. However, the sleeve body is slotted, allowing its walls to deform radially. The sleeve body is surrounded by a clamping ring that presses the sleeve walls against the light guide rod. This creates a frictional connection between the sleeve wall and the light guide rod, which is able to hold the light guide rod in the fixing element.

[0004] The fastening options for light guide rods in the holder of a cooking appliance light, known from the prior art, are quite satisfactory, even if in certain installation situations the positive locking connection is preferable to the friction locking connection.

[0005] EP 2 913 591 A1 describes a cooking appliance with a light. To enable a specific cooling function for the light, a light holder consisting of several individual parts was developed.

[0006] German patent application DE 20 2015 104 575 U1 discloses a simple household appliance lamp. The holder proposed therein locks a circuit board in place and accommodates a light guide rod positioned opposite the direction of light emission from a light source.

[0007] EP 3 388 747 A1 shows a light guide which integrates a cover for an opening in a cooking chamber wall and is aligned at a specific angle to the cover.

[0008] EP 4 033 861 A1 shows a cooking appliance light in which the light guide rod is provided with a circumferential groove. Locking tabs formed by an annular collar engage in the circumferential groove to anchor the light guide rod.

[0009] Finally, the appliance light of a dishwasher is known from the unrelated patent EP 2 366 323 A1. In this case, a cover glass is mounted in the holder opposite to the direction of light emission from a light source.

[0010] However, there is room for improvement regarding ease of assembly. Therefore, the object of the invention is to provide a generic luminaire with an alternative light bar mounting.

[0011] The problem of the invention is initially solved by a lamp with the features of claim 1.

[0012] The main advantage of the invention lies in the fact that the light bar is positively locked in the fixing element of the holder. This reliably prevents the light bar from slipping out of the holder during transport or installation of the luminaire. The circumferential projection used for the positive locking connection, which extends radially outwards from the longitudinal axis of the light bar, offers a significant advantage over prior art positive locking connections with regard to light loss within the light bar. A circumferential cutout, unless it is incorporated into the light bar taking into account the light emission angle of the LED and the distance to the light emission plane of the LED, reduces the cross-section available for light transmission and, in some cases, introduces light emission surfaces into the light bar.Light fed into the light guide rod escapes through these light emission surfaces, which are located in the area of ​​the holder's fixing element, resulting in a certain loss of light.

[0013] The positive locking of the light guide rod by a circumferential projection thus gives the designer of a luminaire of this type greater freedom to realize the mechanical fixing of the light guide rod in the holder, without having to worry about possible light losses due to circumferential cutouts known from the prior art, or without having to take into account the maintenance of certain distances between the light emission plane of the LED and the circumferential cutout, taking into account the light emission angle of the LED.

[0014] In addition to mechanically securing the light guide rod in the holder, the circumferential projection can also be used to position the light guide rod in a defined orientation within the holder. This is particularly possible if the circumferential projection extends only along a portion of a circumference and the holder's fixing element has a corresponding recess that accommodates the circumferential projection. This ensures that the circumferential projection can be inserted into and fixed in the fixing element in only one relative orientation to the holder.

[0015] The longitudinal axial circumferential cut of at least 180 degrees and the insertion of the light guide rod transversely to the longitudinal axis of the cylinder wall into the cylinder chamber allow the light guide rod to be inserted into the fixing element transversely to the direction of light emission. This assembly is particularly simple and easy to accomplish and, especially when the luminaire is already mounted, allows for easy replacement of the light guide rod in case of damage.

[0016] In a particularly preferred embodiment, however, the circumferential projection is provided to be a substantially circumferential flange at the end of the light guide rod located at the light entry surface of the light guide rod.

[0017] This embodiment has the significant advantage that the light guide rod is rotationally symmetrical, at least with respect to its mounting element designed as a flange, which greatly simplifies the manufacture of the light guide rod.

[0018] Positioning the flange at the end of the light guide rod that forms the light-emitting surface increases the light-emitting surface by the width of the flange. With a suitable LED design, this allows more light to be fed into the light guide rod.

[0019] In particular, if the transition between the flange and the light guide rod located in the direction of light emission is optically correct, total reflection of the light is ensured even in the transition area, so that light emission in the transition area is reliably avoided due to the enlarged light feed area of ​​the light guide rod.

[0020] Furthermore, a flange has the advantage that the alignment of the light guide rod during assembly in the fixing element of the holder is irrelevant due to the rotational symmetry, and assembly is significantly simplified.

[0021] It is provided that the fixing element of the holder is a hollow cylindrical component with a cylinder wall which has an inner circumferential recess in a radial plane, in particular a recess formed at least as an annular groove section, in which the circumferential projection of the light guide rod is positively engaged, in particular if the inner circumferential recess, in particular in the form of at least one annular groove section, is formed at the end of the cylinder wall near the holder.

[0022] These features of the invention ensure that a complementary structure matching the circumferential projection or flange is present in the fixing element. This structure accommodates the inventive projection, or, if necessary, the flange. This creates a tensile-resistant positive-locking connection in the direction of light emission, which securely holds the light guide rod in the lamp holder.

[0023] It is then provided that a locking element holds the light guide rod in the cylinder wall of the fixing element.

[0024] The locking element is responsible for securing the light guide rod inserted into the fixing element along a mounting direction against a corresponding counter-movement and thus keeping the light guide rod in the fixing element.

[0025] It is provided that the locking element is a locking ring radially encompassing the cylinder wall of the fixing element, in particular an elastomer ring, which preferably lies in a locking ring groove machined circumferentially into the cylinder wall.

[0026] The ring-shaped locking element allows the light guide rod to be easily anchored in the fixing element, preventing it from slipping out perpendicular to the light emission direction. An elastomer ring is preferred as the locking element in this invention because it is particularly easy to handle. However, a slotted ring element made of resilient material can also be used as the locking ring. This material expands when placed on the cylindrical wall of the fixing element due to the slot and returns to its original shape upon reaching the locking ring groove. Suitable resilient materials include, for example, metals or plastics. Their main advantage is their longer service life at high temperatures. These temperatures are a crucial factor to consider in cooking appliances, especially pyrolytic ovens, with regard to the lifespan of the materials used.

[0027] An alternatively designed fixing element is characterized by the fact that the cylinder wall forms at least one resiliently elastic safety wing projecting into the circumferential relief, which, as a safety element, narrows the circumferential relief in a radial plane and rests on the outer circumference of the light guide rod.

[0028] In this embodiment as well, the light guide rod is inserted into the holder's fixing element transversely to the direction of light emission. The locking wings slide down the outer circumference of the light guide rod and spread apart, retracting once the light guide rod is correctly positioned in the fixing element. The locking wings then grip the light guide rod and secure it against slipping out of the fixing element in the opposite direction of installation.

[0029] The key advantage of this design is that no separate locking element is required. Ideally, the locking wings are a single, integral part of the cylinder wall. This is easy to achieve in manufacturing and simplifies assembly, as only the light guide rod needs to be inserted, without the need for a separate locking element.

[0030] Further advantages of the invention, as well as a better understanding of it, will follow from the description of various embodiments of the invention. These show: Figure 1 shows a first embodiment of the invention in a first exploded view, Figure 2 shows the embodiment according to Figure 1 In a second exploded view, Figure 3 shows a top view of the holder of the embodiment according to Figure 1 Figure 4a shows a representation of the light guide rod and holder of the embodiment according to Figure 1in pre-assembly position, Figure 4b the view according to Figure 4a in a longitudinal section, Figure 5a a view of light guide rod and holder according to embodiment according to Figure 1 In assembly position, Figure 5 legs sectional view of the Figure 5a Figure 6 shows a first vertical section through the embodiment according to Figure 1 Figure 7 shows a second vertical section through the embodiment according to Figure 1 Figure 8 shows an embodiment not according to the invention in exploded view; Figure 9 shows a top view of the holder of the embodiment according to Figure 8 Figure 10a shows a representation of the holder and light guide rod of the embodiment according to Figure 8 in pre-assembly position, Figure 10b the illustration according to Figure 10a in longitudinal section, Figure 11 shows the holder and light guide rod of the embodiment according to Figure 8 in assembly position, Figure 11b the illustration according to Figure 11ain a vertical section, Figure 12 a view from above of the holder with inserted light guide rod according to the embodiment according to Figure 8 ,

[0031] The invention is described below using two exemplary embodiments, as illustrated in the Figures 1 - 12 , described in detail.

[0032] In the figures, a lamp according to the invention is provided with the reference numeral 10. A first embodiment of the lamp 10 according to the invention is shown in the Figures 1 to 8 The general description, applicable to all embodiments, is essentially derived from the following explanations regarding the Figure 1 and 2 .

[0033] The light fixture 10 initially comprises a holder 11. This serves to connect and align all the individual parts of the light fixture 10. In addition, in embodiments of the invention, the holder 11 also serves to mount the light fixture 10 on a support component (not shown) of a household appliance, in particular a cooking appliance. For this purpose, pins 12 are inserted through coil springs 13 into pin receptacles 14. The support component (not shown) has holes through which the pins 12 can be inserted. When the light fixture 10 is mounted on the support component, the coil springs 13 are subjected to a spring preload. The spring forces allow, on the one hand, the compensation of dimensional tolerances and, on the other hand, the compensation of material expansion due to temperature influences, particularly in cooking appliances such as ovens.They therefore ensure a secure and vibration-free fit of the light 10 on a support component of a device.

[0034] A printed circuit board 15 has at least one LED 16, which serves as a light source and from which light is emitted in the direction of light emission X. Terminal blocks 17, which are soldered onto the printed circuit board 15, serve to electrically connect the printed circuit board 15 to a power source via pluggable connecting conductors (not shown).

[0035] The printed circuit board 15 is placed on a counter support 18, in particular designed as a heat sink. For this purpose, locking spring elements 19 are used, the base 20 of which sits in a mounting groove 21 of the counter support and whose retaining arms 22 rest on the upper side of the printed circuit board 15 facing away from the counter support 18 and press it against the counter support.

[0036] The holder 11 forms a printed circuit board receptacle 23 on its underside facing the counter bearing 18 (see in particular ). Figure 2 This can be provided with spacers 24 projecting towards the counter bearing 18. These create a space between the cover wall 25 of the holder 11 and the circuit board surface, which can be used for electronic components mounted on the circuit board, such as the LED 16 or control chips. Furthermore, a cooling airflow can be directed through the resulting air space to ensure adequate heat dissipation for LED operation.

[0037] The mandrels, designated as spacers 24, could also serve as bearing coding for the circuit board 15. For this purpose, the mandrels engage in corresponding recesses of the circuit board 15.

[0038] For the connection terminals 17, the cover wall 25 of the holder 13 forms a receiving dome 26, which is provided laterally to the outside with a conductor entry opening 27.

[0039] The holder 11 has an opening 28 in its cover wall 25, which is located above the LED 16 in the direction of light emission X. The light emitted by the LED exits the holder 11 through the opening 28 in the cover wall 25.

[0040] A central component of the holder 11 is a hollow cylindrical to sleeve-like fixing element 29, which positively engages a light guide rod 30 with the holder 11. The four described embodiments differ essentially in the design of this fixing element 29, which will be discussed in detail later.

[0041] The light guide rod 30 is a cylindrical component and, in the exemplary embodiment, is designed as a circular cylinder. However, different cross-sectional shapes are possible in every respect without departing from the principles of the invention.

[0042] The light guide rod 30 is provided with a circumferential projection. That is, the light guide rod material is projected radially away from the circumferential surface, pointing away from the longitudinal axis of the light guide rod 30. In the embodiments, this circumferential projection is generally represented as a circumferential flange 31 located at the end of the light guide rod 30 closest to the circuit board 15. In other words, the flange 31 is located at the end of the light guide rod 30 that forms a light entry surface 32 of the light guide rod.

[0043] To secure the light guide rod 30 in the fixing element 29 of the first embodiment of the invention according to the Figures 1 to 8 A retaining ring 33 is also provided, the function of which is also described below.

[0044] As seen in the overall view of the Figures 1 to 3As can be seen in the first embodiment, the hollow cylindrical fixing element 29 of the first embodiment has a cylinder wall 34 forming the hollow cylinder. This wall has a retaining ring groove 35 in its outer surface. The cylinder wall 34 originates from the cover wall 25 of the holder 11 in the light emission direction X and surrounds the opening 28. The inner circumferential surface of the cylinder wall 34 has an annular groove section 36 at its end near the cover wall 25, which extends completely along the inner circumference of the cylinder wall 34. Figure 1 and 2 , but especially also the supervision of the keeper in accordance with Figure 3The drawings show that the cylinder wall 34 extends only over a circumferential angle of 180° around the opening 28. The hollow cylindrical fixing element 29 according to the first embodiment of the invention is thus designed in the manner of a vertically cut half-cylinder. Furthermore, it can be seen from the drawings that the inner circumferential surface of the cylinder wall is provided with centering ribs 37 to hold the light guide rod vertically centered in the fixing element 29.

[0045] Figure 4a Figure 1 shows the holder 11 on the one hand, and the light guide rod 30 on the other, in side view and pre-assembly position. Here, the light guide rod 30, with its light entry surface 32, is positioned at the level of the top of the cover wall 25 of the holder 11 and is located next to the cylinder wall opening, which is not limited by the cylinder wall 34. Figure 4b shows the facts according to Figure 4aIn sectional view. This sectional view shows that the flange 31 of the light guide rod 30 is positioned at the level of the annular groove section 36 of the cylinder wall 34. An arrow also indicates the mounting direction M1, along which the light guide rod 30 is inserted through the cylinder wall opening into the fixing element 29. The flange 31 engages in the annular groove section 36. In this way, the light guide rod 30 is positively locked in the cylinder wall 34 of the fixing element 29 in the light emission direction X.

[0046] The mounting position of holder 11 and light guide rod 30 in side view is shown in Figure 5a and in a corresponding sectional view in Figure 5b shown. One can see from the Figure 5a First, recognize that the cylinder wall 34, due to its 180° circumferential angle, surrounds the light guide rod along half its circumference. Figure 5bshows the engagement of the flange 31 of the light guide rod 30 in the annular groove section 36 of the cylinder wall 34.

[0047] Figure 6 The figure now shows a lateral sectional view through the complete luminaire 10. Here, it can be seen how the circuit board 15 is seated within the circuit board receptacle 23 of the holder 11 and how the detent spring elements 19, with their respective bases 20, are anchored in the mounting groove 21 of the counter bearing 18, which is designed as a heat sink. The light guide rod 30 is positioned accordingly. Figures 5a and 5b in the fixing element 29, wherein the flange 31 of the light guide rod 30 is inserted into the annular groove section 36 of the cylinder wall 34.

[0048] The retaining ring 33 is pushed onto the light guide rod 30 opposite to the direction of light emission X and placed circumferentially around the cylinder wall. The retaining ring 33 is seated in the circumferential retaining ring groove 35 of the cylinder wall 34.

[0049] Figure 8 shows a cross-section of the frontal view of the luminaire 10 according to the first embodiment, which is opposite to Figure 6 The described situation is shown in a correspondingly different view. However, this view also shows how the connection terminals 17 are seated below the receiving dome 26 of the holder 11.

[0050] In the Figures 8 to 12 An exemplary embodiment is shown which has a high degree of similarity in structure and design to the first embodiment. This is readily apparent from the exploded view in Figure 8 evident. In this respect, the general description applies to the second embodiment, which in particular relates to the Figure 1 and 2 was done.

[0051] Here too, the holder 11 serves as the central component to which the individual parts of the luminaire 10 are attached. The circuit board 15, with its counter bearing 18 designed as a heat sink, is attached to the holder 11 from below. The holder 11 has a fixing element 29 on its upper side, which extends in the direction of light emission and is essentially a hollow cylindrical component with a cylindrical wall 34 that pierces the top wall 25 of the holder 11 through an opening 28. The opening 28 allows light emitted by the LED 16 to be fed into a light guide rod 30.

[0052] The light guide rod 30 is also designed analogously to the first embodiment component as a circular cylindrical rod with a circumferential flange 31, whereby - as described in embodiment 1 - deviations in the cross-section as well as alternative structures to the flange 31 are also possible.

[0053] It is striking that the example, as in Figure 8 shown, without retaining ring 33 and that the fixing element 29 has a different design.

[0054] In this example as well, the fixing element 29 is initially formed by a cylindrical wall 34, which is firmly connected to the cover wall 25 of the holder 11 at a circumferential angle of approximately 180° and forms an annular groove section 36 at its end near the cover wall 25 for receiving the flange 31 of the light guide rod 30. Here too, the cylindrical wall 34 has centering ribs 37.

[0055] The circumferential angle of 180° of the cylinder wall implies that, in this embodiment as well, the fixing element has a circumferential cutout or opening extending approximately over a circumferential angle of 180°. The circumferentially oriented ends of the cylinder wall 34 each form a locking wing 38. This wing is resilient and not connected to the cover wall 25. Each locking wing 38 is therefore radially movable relative to the cover wall 25. In embodiment 2, the locking wings 38 are formed with the cylinder wall 34 in a single, material-bonded manner and engage in the circumferential cutout or opening of the cylinder wall 34. In this way, the circumferential cutout of the cylinder wall 34 is narrowed.

[0056] This fact is shown again in the view from above of holder 11. Figure 9The figure shows how the cylindrical wall 34 of the fixing element 29 surrounds the opening 28 for light transmission at a circumferential angle of approximately 180° up to the dashed boundary line G, where the circumferential opening or circumferential cutout of the cylindrical wall 34 of the fixing element 29 lies beyond the boundary line. The locking wings 38 each adjoin the cylindrical wall 34 and engage in the circumferential cutout, thus narrowing it.

[0057] The Figures 10a and 10b show the holder 11 and the light guide rod 30 in pre-assembly position, wherein Figure 10b a vertical section according Figure 10aAs in the first embodiment, in the pre-assembly position the light entry surface 32 of the light guide rod 30 is located at the level of the surface of the cover wall 25, to the side of the circumferential opening of the cylinder wall 34 of the fixing element 29. The flange 31 is aligned with the annular groove section 36, so that inserting the light guide rod 30 in the assembly direction M1 causes the flange 30 to immerse itself in the annular groove section 36. The light guide rod 30 passes through the circumferential cutout or the circumferential opening of the cylinder wall 34, whereby the Figure 10a The safety wing 38 shown is spread radially outwards.

[0058] After the light guide rod 30 passes through the circumferential cutout in the cylinder wall 34, the locking wings 38, due to their elastic recovery, conform to the outer circumference of the light guide rod 30 and thus narrow the circumferential opening. This reliably prevents the light guide rod 30 from slipping out against the mounting direction M1.

[0059] The mounting position of holder 11 and light guide rod 30 is shown in the Figure 11a and 11b depicted, whereby the Figure 11b a vertical section of the representation according to Figure 11a This shows that the light guide rod 30 with its light entry surface 32 is arranged above the opening 28 in the cover wall 25 of the holder 11, so that light emitted by the LED 16 (not shown) can be fed into the light guide rod 30.

[0060] Figure 11Furthermore, it shows how the flange 31 of the light guide rod 30 dips into the ring section 36 and is secured there against slipping out in the light emission direction X.

[0061] Figure 11a In contrast, the side view shows the light guide rod 30 mounted in the holder 11. Here it can be seen that the cylinder wall 34 surrounds the light guide rod 30 over a circumferential angle of approximately 180° and that the light guide rod 30 is otherwise held in the area of ​​the circumferential clearance by the adjacent safety wing 38 in the fixing element 29.

[0062] In this context, we would also like to draw attention once again to the Figure 12Reference is made to Figure 1, which shows a top view of the luminaire 10. Here, the light guide rod 30 is inserted in holder 11. The separation between the cylinder wall 34 and the locking wings 38 is clearly visible based on the drawn boundary line G. It is also visible how the locking wings 38 bear against the outer circumference of the light guide rod 30 and, by narrowing the circumferential opening of the cylinder wall 34, secure it in the holder 11 against slipping out in the opposite direction to the mounting direction M 1.

[0063] The embodiment and example described above are characterized, among other things, by the fact that the light guide rod 30 is inserted into the fixing element 29 transversely to the direction of light emission X via a circumferential opening in the cylinder wall 34.

[0064] The embodiments 3 and 4 described below have in common that the light guide rod 30 is inserted from the underside of the holder 11 facing the circuit board 15 in the direction of light emission X through the opening 28 and inserted into the fixing element 29.

[0065] In summary, the invention presents a novel light 10, particularly for household appliances, especially cooking appliances. This light ensures a positive-locking and therefore very secure fit of the light guide rod 30. Abstractly speaking, this positive lock is achieved by a circumferential projection of the light guide rod 30, wherein the circumferential projection sits in a corresponding recess of the holder 11 or the fixing element 29 of the holder 11. It is particularly preferred if the circumferential projection is designed as a flange 31 and this flange 31 is located at the end of the light guide rod 30 that forms the light entry surface 32.

[0066] It should also be noted that it is possible to ensure a defined orientation of the light guide rod 30 relative to the holder 11 with respect to its axial rotation. For this purpose, cutouts can be incorporated into the flange 31, into which pins located in the annular groove 36 or the annular groove sections 36 engage. This reliably prevents rotation of the light guide rod 30 around its longitudinal axis. Furthermore, the number and position of the cutouts in the flange 31 allow specific light guide rods 30 to be coded for correspondingly designed holders 11, so that defined light guide rods 30 can be assigned to specific holders 11. In addition to preventing rotation, a coding function can thus also be achieved.

[0067] In addition to the advantageous positive locking for securing the light guide rod 30 in the holder 11, the circumferential projection on the light guide rod 30, in particular the flange 31, ensures that the light guide rod 30 can be used in its full cross-section for light transmission. Light losses due to circumferential cutouts in the light guide rod 30 are thus reliably avoided. REFERENCE MARK LIST

[0068] 10 Light 11 Holder 12 Plug pin 13 Coil spring 14 Bolt receptacle 15 Circuit board 16 LED 17 Terminal block 18 Counter bearing 19 Detent spring elements 20 Foot 21 Mounting groove 22 Retaining arm 23 Circuit board receptacle 24 Spacer 25 Cover plate 26 Mounting dome 27 Conductor entry hole 28 Opening 29 Fixing element 30 Light guide rod 31 Flange 32 Light entry surface 33 Retaining ring 34 Cylinder wall 35 Retaining ring groove 36 Ring groove section 37 Centering ridge 38 Retaining wing 39 Detent tongue 40 Detent lips 41 Spacer ring GG boundary line X Light emission direction M 1 Mounting direction M 2 Mounting direction

Claims

1. Cooking appliance lamp (10), - with a light source formed by a printed circuit board (15) with LEDs (16) arranged on it, which emit light in the light emission direction (X), - with a light guide rod (30) that has a light entry surface (32) for the light emitted by the LED (16), - with a holder (11) that has a circuit board receptacle (23) on its underside and, on its upper side opposite the underside, a fixing element (29) for receiving the light guide rod (30), - with an opening (28) in the holder (11) in the area of the fixing element (29), through which the emitted light from the LED (16) arranged on the underside reaches the light guide rod (30) arranged on the upper side, light guide rod (30) located on the upper side, whereby - the light guide rod (30) has a circumferential projection made of the same material and connected to the rod in a material-locking manner in a radial plane, - the light guide rod (30) is fixed in a form-locking manner in the fixing element (29) of the holder (11) by means of the circumferential projection, - the fixing element (29) of the holder (11) is a hollow cylindrical component with a cylinder wall (34) which has an inner circumferential recess in a radial plane, in which the circumferential projection of the light guide rod (30) is positively engaged, characterised in that the cylinder wall (34) of the fixing element (29) has a longitudinal axial peripheral free cut of at least 180 degrees and the light guide rod (30) is inserted transversely to the longitudinal axis of the cylinder wall (34) into the cylinder space of the fixing element (29).

2. Cooking appliance lamp according to claim 1, characterised in that the peripheral projection is a substantially circumferential flange (31) at the end of the light guide rod (30) located at the light entry surface of the light guide rod (30)3. Cooking appliance lamp according to claim 1, characterised in that the fixing element (29) has a recess formed at least as a ring groove section (36).

4. Cooking appliance lamp according to claims 2 and 3, characterised in that the inner circumferential recess is formed, in particular in the form of at least one annular groove section (36), at the end of the cylinder wall (34) close to the holder.

5. Cooking appliance lamp according to one of the preceding claims, characterised in that a securing element holds the light guide rod (30) in the cylinder wall (34) of the fixing element (29).

6. Cooking appliance lamp according to claims 1 and 5, characterised in that the securing element is a retaining ring (33) radially surrounding the cylinder wall (34) of the fixing element (29), in particular an elastomer ring, which is preferably located in a retaining ring groove (35) incorporated in the outer circumference of the cylinder wall (34).

7. Cooking appliance lamp according to claims 1 and 5, characterised in that the cylinder wall (34) forms at least one resilient retaining wing (38) projecting into the peripheral cut-out, which, as a retaining element, narrows the peripheral cut-out in a radial plane and rests against the light guide rod (30) on its outer circumference.