Headrest for a vehicle seat with a lighting device

Abstract

The invention relates to a headrest (1) for a vehicle seat (2), wherein the headrest (1) comprises at least two headrest rods or headrest rod sections which extend at least substantially in parallel, on or can be arranged on which a head cushion of the headrest (1) is arranged, and a headrest guide assembly via which the headrest rods or headrest rod sections are received or can be received on and in particular in a seat back of the vehicle seat (2), so that the headrest rods or headrest rod sections together with the head cushion of the headrest (1) optionally arranged on the headrest rods or headrest rod sections can be adjusted and in particular slid in the longitudinal extension direction of the headrest rods or headrest rod sections relative to the headrest guide assembly between a first position and at least one second position. According to the invention it is in particular provided that at least one lighting device (4) is associated with the headrest guide assembly or the headrest guide assembly comprises at least one lighting device (4) which is configured to illuminate at least one of the two headrest rods or headrest rod sections, in particular both of the two headrest rods or headrest rod sections, in particular at least indirectly, at least partially or locally, as required.

Description

Technical Field

[0001] This invention relates to adjustable headrest assemblies for vehicle seats, particularly motor vehicle seats. More specifically, this invention relates to a headrest for a vehicle seat having a special headrest guide assembly with integrated lighting, as well as such a headrest guide assembly itself and a method of illuminating the vehicle interior using the assembly. Background Technology

[0002] Headrests are an important part of a vehicle's passive safety system. Their primary function is to reduce the forces acting on the occupant's cervical spine in the event of sudden changes in vehicle motion (such as those occurring in a traffic accident), thereby reducing the risk of injury (such as neck sprains). In addition to improving safety, headrests also enhance ride comfort by providing support for the head and neck. To optimally perform these functions, headrests are typically height-adjustable, allowing them to be individually adjusted to the height of the respective vehicle occupant.

[0003] Typically, such headrests have two headrest rods for this purpose, which are slidably mounted in corresponding receiving parts, namely the so-called headrest guides in the back of the vehicle seat. Mechanical locks with locking points on the rods ensure that the headrest is securely held in the selected position.

[0004] Alongside these functional aspects, vehicle interiors have evolved into a key differentiator for automakers in recent years. Interior design, materials used, and ambient lighting are increasingly used to create specific atmospheres, ranging from sporty minimalism to luxurious comfort, influencing consumer attention and purchasing decisions. Ambient lighting is used in a targeted manner to enhance perceived value, security, and spaciousness. Known solutions include illuminating trim pieces in the dashboard and door panels, highlighting speaker grilles and vents, or even integrating logos into seat surfaces or incorporating starlight effects into the headliner.

[0005] However, existing technologies have drawbacks. Current ambient lighting solutions are largely limited to static, purely decorative surfaces or single functional components. Lighting solutions have not yet been integrated into movable, safety-related, and structural components such as headrest assemblies. Headrest bars and their guides are considered purely functional technical requirements that do not contribute to interior design.

[0006] This missed the opportunity to integrate another striking seating element into the vehicle's overall lighting concept, thus missing the chance to create a new and unique design. Such integration is technically challenging because the lighting fixture must be robust, durable, inexpensive, and securely integrated into the headrest's mechanical guidance and adjustment functions without compromising the lighting fixture itself. Summary of the Invention

[0007] Therefore, the object of this invention is to provide a headrest assembly for vehicles that overcomes the shortcomings of the prior art. In particular, a solution will be created that achieves novel and aesthetically pleasing ambient lighting by incorporating purely functional components into the design concept of vehicle interiors.

[0008] In particular, the headrests are designed to retain their safety-related and ergonomic functions without restriction, are simple and cost-effective to manufacture and install, and significantly increase the perceived value and atmosphere of the vehicle.

[0009] The object of the present invention is achieved by a headrest having the features of independent claim 1, a headrest guiding assembly having the features of independent claim 12, and a method having the features of independent claim 18. Advantageous further developments of the invention are specified in the dependent claims.

[0010] Therefore, the present invention particularly relates to a headrest for a vehicle seat, the headrest comprising: two at least substantially parallel headrest bars or headrest bar portions, the headrest's head cushion being disposed on or arrangable on the headrest bars or headrest bar portions; and a headrest guide assembly, the headrest bars or headrest bar portions being received or arrangable on, and particularly within, the seat back of the vehicle seat, such that the headrest bars or headrest bar portions, together with the headrest's head cushion optionally disposed on the headrest bars or headrest bar portions, are positioned relative to the headrest guide assembly. The component is adjustable and, in particular, slidable between a first position and at least one second position along the longitudinal extension direction of the headrest bar or the headrest bar portion, characterized in that at least one lighting device is associated with the headrest guide assembly, or the headrest guide assembly includes at least one lighting device configured to illuminate at least one of the two headrest bars or headrest bar portions, and in particular both headrest bars or headrest bar portions, particularly as needed, at least partially or partially, at least indirectly illuminated.

[0011] The core of this invention is to use the headrest guide assembly itself (a purely mechanical and mostly invisible component) as a support for the lighting device.

[0012] A completely new visual effect is achieved by emitting light from the base of the headrest bar and illuminating it. The headrest bar, typically a chrome-plated or painted metal strip, becomes a luminous feature that appears to grow out of the seat. This provides the psychological appreciation and obvious luxury character demanded by customers and design institutes, and achieves a strong emotional connection with the vehicle.

[0013] This integration offers significant advantages over existing technologies. Instead of illuminating another surface, it illuminates dynamic structural elements. The lighting is subtle and indirect, avoiding glare and creating a high-quality, comfortable atmosphere. The technological effect is that functional components are given an aesthetic dual function without compromising their primary function—the safety and stability guidance of the headrest. This allows automakers to differentiate themselves from the competition through unique and innovative design features deeply integrated into the vehicle architecture.

[0014] The solution according to the invention is also flexibly configurable. Depending on the design of the lighting device and the surface condition of the headrest bar, the light may appear soft and diffused or sharp and prominent. The color and intensity of the lighting can be controlled via the vehicle's central control system and synchronized with the remaining ambient lighting. For example, the lighting can be adjusted to a selected driving mode (e.g., red for "Sport" and blue for "Economy"), or it can pulse when the door is opened to welcome the driver.

[0015] The present invention also relates to a headrest guide assembly for a headrest of a vehicle seat, wherein the headrest includes two headrest bars and the headrest guide assembly is configured to slidably receive the headrest bars, characterized in that the headrest guide assembly includes an illumination device configured to illuminate at least one of the headrest bars at least indirectly.

[0016] This independent claim protects the headrest guide assembly as an independent, tradable product.

[0017] This offers a key benefit to the automotive industry supply chain. Seat manufacturers or suppliers can obtain these intelligent, illuminated guide units as pre-assembled modules and integrate them into their existing seat structures without having to undertake the complex development of optical, electronic, and mechanical integration themselves. This significantly reduces development costs and complexity for seat manufacturers.

[0018] Technically, this method achieves high process reliability and quality. The lighting unit, including the light source, light guide, and control electronics, can be manufactured, tested, and qualified as a single unit.

[0019] This ensures that light output, color temperature, and lifespan remain consistent throughout the production process. For automakers, this translates to simplified assembly and higher reliability of the final product, as the critical interface between mechanical components and electronics is moved to a single, proven component.

[0020] As an alternative configuration, such modular guide units can be equipped with standardized electrical and mechanical interfaces.

[0021] This will allow the same basic unit to be used in different vehicle models or even different manufacturers, resulting in economies of scale and further cost reduction. Specific light colors or controls can then be defined in the software for the corresponding vehicle, meaning maximum flexibility with minimal hardware differences.

[0022] Finally, the present invention relates to a method for illuminating the interior of a vehicle, the method comprising the following steps: - Provides a headrest of the type according to the invention described above; - Activate the lighting components set in the headrest guide assembly to emit light; and - Direct light from the lighting device to illuminate at least one area of ​​at least one headrest bar that is visible outside the headrest guide assembly.

[0023] This method requires the functional application of a protective device and provides an additional protective layer. This method encompasses the intended use of the invention, namely, actively generating light effects in interior decoration.

[0024] This is advantageous because it prevents third parties from replicating the effects according to the invention through combinations of individual components, even if the entire headrest assembly is not sold as a unit. Therefore, protecting this process ensures the core of the innovative contribution: creating a specific visual experience.

[0025] The technical advantage of this method lies in the targeted illumination of the visible portion of the headrest bar. The "light conduction" step ensures that light energy is used efficiently and only when the desired aesthetic effect is desired. This avoids scattered light within the seat structure and maximizes visible brightness with minimal energy consumption. This targeted use of light is a key aspect of the high-quality impression imparted by this invention.

[0026] This method also allows for dynamic interaction with user and vehicle status.

[0027] The "activation" step could be associated with various events, such as unlocking the vehicle, selecting a driver profile, or even a warning message from the vehicle. For example, in the event of emergency braking, the lighting could illuminate red to warn subsequent occupants. The development of such ideas suggests that this approach goes beyond purely static ambient lighting and has the potential for functional, safety-enhancing applications.

[0028] According to a preferred embodiment, at least one lighting device may be configured to illuminate at least one area of ​​at least one of the two headrest bars or headrest bar portions that is not received by the headrest guide assembly, particularly as needed, at least partially or partially, or at least indirectly illuminated.

[0029] This design ensures that light energy is used purposefully and effectively to achieve the desired aesthetic effect. Only the visible portion of the rod protruding from the guide is illuminated to prevent light loss inside the seat back. This achieves greater brightness with the same energy input and avoids unwanted reflections or light shining through the seat cover.

[0030] In alternative developments, it can be specified that the headrest also includes a lock, particularly a manually actuated lock that can move between a first state (locked state) and a second state (unlocked state).

[0031] The integration of a lock is essential for the secure use of the headrest, as it fixes the headrest in place and prevents unintended adjustments.

[0032] This implementation ensures that the invention meets the basic safety requirements for modern headrests. Manual actuation ensures intuitive and easy operation for the user.

[0033] According to an implementation of the invention, at least one lighting device is configured to illuminate at least one area of ​​a lock that is particularly capable of being manually actuated, particularly as needed, at least partially or partially, or at least indirectly.

[0034] The illuminated locking mechanism provides a significant benefit to usability, especially in low-light conditions. Users can easily locate and operate the adjustment buttons or levers, facilitating proper and safe adjustment of the headrest.

[0035] This not only contributes to comfort but also indirectly to safety, as a properly adjusted headrest optimally performs its protective function. Furthermore, the illuminated control elements highlight the vehicle's premium positioning.

[0036] According to a preferred embodiment, at least one lighting device may include a light source support (e.g., a plate with LEDs) and a light diffuser coupled to the light source support, which directs light onto the headrest bar.

[0037] This two-piece design offers high design flexibility and excellent light quality. The light diffuser, also known as a light guide, can be shaped to receive the focused light from the LED and convert it into a soft, uniform, and consistent surface illumination of the headrest bar, thus avoiding unsightly "hot spots." Furthermore, the light diffuser protects the sensitive light source from mechanical stress, dust, and moisture.

[0038] In alternative developments, it can be specified that the light diffuser comprises a body made of transparent or translucent material, particularly a hollow cylinder, through which the headrest rod is guided.

[0039] The hollow cylindrical design is a particularly elegant and technically simple solution for the ring-shaped enclosure of the headrest bar. This achieves very uniform 360-degree illumination of the bar and integrates it compactly into the guide sleeve. The use of transparent or translucent plastic also enables inexpensive manufacturing via injection molding.

[0040] According to an embodiment of the present invention, at least one lighting device includes an annular light source support having a plurality of LEDs, and one of the headrest rods is guided through the light source support.

[0041] This alternative design achieves very high light intensity and direct illumination of the rod without needing to bypass a light diffuser. The arrangement of several LEDs on the ring provides redundant and uniform light distribution even if a single LED fails. This configuration is particularly suitable for designs aiming to produce bright, dazzling lighting effects.

[0042] According to a preferred embodiment, the headrest guide assembly includes a first guide sleeve body and a second guide sleeve body for receiving one of the headrest bars.

[0043] This design corresponds to established standards for headrest guides and ensures stable and secure guidance of the headrest. It forms a mechanical base into which the lighting device according to the invention can be elegantly integrated. Dividing the guide into two separate bodies achieves symmetrical illumination of the two rods.

[0044] In alternative developments, it can be specified that the guide sleeve body is received or can be received in a corresponding receiving part in the seat back of the vehicle seat.

[0045] This implementation describes a standardized interface to the vehicle seat and ensures compatibility of the arrangement according to the invention with existing seat structures. This allows for easy and rapid assembly of the entire headrest guide assembly during seat manufacturing. This is a key benefit for smooth integration into mass production.

[0046] According to an embodiment of the present invention, the headrest guide assembly has a tolerance compensation element for balancing the tolerance variation between the distances of the two headrest bars.

[0047] This technical feature has high practical value because it compensates for manufacturing-related inaccuracies in the seat structure. Tolerance-compensating components ensure the headrest is always easily adjustable and won't jam, significantly improving perceived quality and ease of use. It also prevents stress and premature wear on the guiding components.

[0048] According to a preferred embodiment, the main body of the light diffuser, made of transparent or translucent material, is disposed in the first guide sleeve body or the second guide sleeve body.

[0049] This is the most compact and robust integrated form because the light diffuser is directly cast or inserted into the housing of the guide sleeve. This optimally protects the light diffuser from external influences and reduces the number of individual parts, simplifying assembly and lowering costs. This unibody design achieves a particularly clean and high-quality overall appearance.

[0050] In alternative developments, it can be specified that the headrest guide assembly includes a sound insulation device for reducing noise between the headrest rod and the headrest guide assembly.

[0051] Sound insulation is a key feature of a superior driving experience because it prevents unwanted rattling or squeaking sounds while driving or adjusting the headrest. This significantly helps reduce noise, vibration, and acoustic harshness (NVH), improving the overall comfort and perceived quality of the vehicle. The absence of noise is a clear hallmark of high-quality mechanical design.

[0052] Therefore, it should be noted that the present invention relates to a novel headrest assembly for vehicle seats, wherein the illumination device is directly integrated into the headrest guide assembly. Instead of simply illuminating the decorative surface as is common in the prior art, the present invention uses a guide sleeve mounted on the seat back to illuminate the headrest rod itself. This produces a unique visual effect, where the rod appears as floating points of light.

[0053] The decisive advantage lies in transforming previously purely functional and often overlooked components into central elements of the interior design, thereby significantly enhancing the vehicle's perceived value and atmosphere.

[0054] To achieve this effect technically, the present invention proposes two main embodiments. One variation uses a so-called light diffuser, which is constructed as a transparent or translucent hollow cylinder and surrounds the head constraint rod. A laterally arranged light source (typically an LED) feeds light into the body, which then guides the light uniformly onto the surface of the rod.

[0055] This achieves a particularly soft, even, and indirect lighting effect.

[0056] Alternatively, a ring light source support with multiple LEDs can be positioned directly around the headrest bar to achieve stronger and brighter direct lighting.

[0057] Both solutions are designed to be compactly and robustly integrated into existing mechanics.

[0058] Beyond its purely aesthetic appeal, this invention also enhances usability and comfort. The headrest assembly retains all its functionality, including high adjustability and a manually actuated lock for security.

[0059] A particular advantage arises when the lighting is designed to illuminate not only the bar but also the area of ​​the locking mechanism. This makes it easier for users to find and operate the adjustment buttons in the dark, making the correct and safe adjustment of the headrest more intuitive and comfortable.

[0060] From a manufacturing and quality perspective, this invention also offers significant advantages. The headrest guide assembly can be designed as a stand-alone, pre-assembled, and tested module, thereby simplifying the vehicle manufacturer's supply chain and ensuring consistently high quality.

[0061] Features such as integrated tolerance compensation components compensate for manufacturing-related deviations in the seat structure and ensure consistently smooth and unobstructed adjustments. Furthermore, sound insulation can be provided to prevent rattling or friction noise, significantly contributing to the overall impression of a quiet and luxurious vehicle interior.

[0062] In summary, this invention creates a multifunctional component that combines safety-related guidance mechanisms with sophisticated ambient lighting. By connecting to vehicle electronics, the lighting can be dynamically controlled and adapted to driver profiles, driving modes, or welcome scenarios.

[0063] This invention is not limited to the entire headrest, but also protects the innovative guiding unit as a separate component and the method for generating unique lighting effects. It is a holistic approach that considers both design and user experience as well as practical industrial implementation. Attached Figure Description

[0064] The invention will now be explained in more detail with reference to the accompanying drawings.

[0065] It shows: Figure 1 A schematic diagram of a headrest according to the invention installed on a vehicle seat, and an enlarged view of the guide sleeve body; Figure 2 A schematic diagram of a first embodiment of the guide sleeve body according to the present invention, the guide sleeve body having an illumination device including a light diffuser; and Figure 3 A schematic diagram of a second embodiment of the guide sleeve body according to the present invention, the guide sleeve body having an illumination device including an annular light source support. Detailed Implementation

[0066] Before discussing the exemplary embodiments shown in the accompanying drawings in more detail, the invention will be briefly outlined again.

[0067] In particular, the present invention relates to a headrest assembly for a vehicle seat, wherein a lighting system is directly integrated into a headrest guide assembly, the component of which is mounted in the backrest and receives and guides the headrest bar. The primary purpose of this lighting system is to provide ambient lighting by illuminating the headrest bar itself and / or components of the guide assembly. This creates a novel aesthetic effect by transforming a normally convenient and concealed component into a decorative element of the interior.

[0068] Ambient lighting is increasingly used in modern vehicle interiors to enhance the impression of luxury, value, and safety (e.g., through lighting controls). However, existing solutions focus on static surfaces such as door panels, dashboards, speaker grilles, or air vents. There is a lack of solutions that integrate lighting into functional, adjustable components such as headrest supports.

[0069] This invention solves this problem through a method that allows: - Integrate sophisticated lighting into the headrest assembly in an inexpensive and structurally sound manner. - Create a unique and dynamic visual effect by illuminating the adjustable headrest bar. - Improve the premium feel and atmosphere of the interior without fundamentally altering the core structure of the headrest. - Improve usability by illuminating the headrest's adjustment or locking mechanism.

[0070] The headrest system includes a headrest pad / cushion, at least two substantially parallel headrest bars attached to the pad, and a headrest guide assembly configured for installation in a vehicle seat back. The guide assembly is capable of slidably receiving the headrest bars for vertical adjustment.

[0071] The illumination device is structurally integrated into or disposed within the headrest guide. The illumination device is configured to radiate light to illuminate at least a portion of at least one headrest bar, particularly the visible portion above the guide.

[0072] Implementation Plan A: Light Distribution / Optical Guide Concept (see...) Figure 2 ) Lighting devices include a light source (e.g., an LED on a printed circuit board) and a light diffuser. The light diffuser is a body of a transparent or translucent material (e.g., an injection-molded polymer).

[0073] The distributor is shaped as a hollow cylinder or sleeve through which the headrest bar passes. A light source radiates light into the distributor, which then directs and emits the light toward the headrest bar, thus producing an indirect lighting effect.

[0074] Implementation Plan B: Concept of Ring Light Source (see...) Figure 3 ) The lighting device includes a ring-shaped lamp support (e.g., a ring-shaped printed circuit board). Several LEDs are mounted on the ring. A headrest bar passes through the center of the ring, and the LEDs directly illuminate the bar.

[0075] Typically, the lighting fixtures are configured specifically to illuminate the headrest bar. not yet The portion contained within the bootloader component.

[0076] This invention is particularly significant in integrating a light source into the functional support and guidance structure of the adjustable components. Existing technologies illuminate static panel parts, single-function components (vents), or decorative logos. This invention elucidates the actual structural support of the headrest by embedding the lighting system within the guidance mechanism itself, representing a more complex and novel technological integration.

[0077] In detail, Figure 1 A schematic diagram of a headrest 1 according to the invention installed on a vehicle seat 2 is shown.

[0078] The headrest 1 includes a headrest (not specifically numbered) connected to the backrest of the vehicle seat 2 via two headrest rods. The connection and guidance of the headrest rods are achieved via a headrest guiding assembly, which in this embodiment includes two separate guide sleeve bodies 3, one of which is shown in an enlarged view. Each guide sleeve body 3 is configured to receive one of the headrest rods and enable vertical adjustment thereon.

[0079] A locking element 5, for example in the form of a button, is provided on the guide sleeve body 3, which can be used to lock and release the position of the headrest 1.

[0080] In addition, the guide sleeve body 3 includes elements 10 for tolerance compensation, which compensate for production-related distance fluctuations between the two headrest bars and thus ensure smooth and always unblocked adjustment.

[0081] Figure 2 A schematic diagram of a first embodiment of a guide sleeve body 3 having an integrated lighting device 4 according to the present invention is shown.

[0082] In this embodiment, the lighting device 4 is essentially a combination of a light source support 6 having a light source 7 and a separate light diffuser 8. The light source support 6 is, for example, embodied in a small printed circuit board on which the light source 7, preferably a high-efficiency LED, is disposed. The light diffuser 8 is manufactured as a body made of a transparent or translucent material, such as plastic produced in an injection molding process, and includes a central channel for the headrest bar.

[0083] The light emitted by the light source 7 is coupled to the light diffuser 8, where it is guided and emitted again at a defined exit surface to indirectly illuminate the headrest bar.

[0084] Figure 2 The diagram on the right illustrates how light emitted from the guide sleeve body 3 forms a beam that illuminates the portion of the headrest bar that protrudes from the guide and thus produces a uniform, suspended light effect.

[0085] Figure 3 A schematic diagram of a second alternative embodiment of the guide sleeve body 3 according to the present invention is shown.

[0086] In this variation of the lighting device 4, a separate light diffuser is omitted. Instead, a ring-shaped light source support 9 is used, which is, for example, embodied as a ring-shaped printed circuit board and carries multiple light sources (such as LEDs). The light source supports 6, 9 are positioned around the channel for the headrest bar, so that the light source illuminates the bar directly and from multiple directions.

[0087] This design achieves exceptionally strong and bright illumination of the headrest bar. As in the first embodiment, the entire lighting device 4 is compactly integrated into the guide sleeve body 3, which also has elements 10 for tolerance compensation to ensure flawless mechanical function.

[0088] The invention is not limited to the exemplary embodiments shown in the accompanying drawings, but arises when all the features disclosed herein are considered together.

[0089] List of reference numerals 1. Headrest 2. Vehicle seats 3. Guide sleeve body 4 lighting fixtures 5 locks 6. Light source support components 7. Light source 8 Light Diffuser 9. Ring-shaped light source support 10 Tolerance compensation parts.

Claims

1. A headrest (1) for a vehicle seat (2), wherein the headrest (1) comprises the following components: - Two headrest rods or headrest rod portions, the two headrest rods or headrest rod portions extending at least substantially parallel, and the head cushion of the headrest (1) is arranged on or can be arranged on the two headrest rods or headrest rod portions; and - A headrest guide assembly, wherein the headrest rod or headrest rod portion is received or can be received on the seat back of the vehicle seat (2) via the headrest guide assembly, and particularly received within the seat back, such that the headrest rod or headrest rod portion together with the head cushion of the headrest (1) disposed on the headrest rod or headrest rod portion are adjustable and particularly sliding relative to the headrest guide assembly in the longitudinal extension direction of the headrest rod or headrest rod portion between a first position and at least one second position. Its features are, At least one lighting device (4) is associated with the headrest guide assembly or the headrest guide assembly includes at least one lighting device (4) configured to illuminate at least one of the two headrest bars or headrest bar portions, and in particular both headrest bars or headrest bar portions, especially as needed, at least partially or partially, at least indirectly illuminated.

2. The headrest (1) according to claim 1, wherein the at least one lighting device (4) is configured to illuminate at least one area of ​​at least one of the two headrest rods or headrest rod portions that is not received by the headrest guide assembly, particularly as needed, at least partially or partially, at least indirectly illuminated.

3. The headrest (1) according to claim 1 or 2, wherein the headrest (1) further comprises: - In particular, a lock that can be manually actuated can switch between a first state and a second state, wherein the first state of the lock (5) corresponds to a locked state in which the adjustability of the headrest rod or headrest rod portion relative to the headrest guide assembly is prevented, and wherein the second state of the lock (5) corresponds to an unlocked state in which the adjustability of the headrest rod or headrest rod portion relative to the headrest guide assembly is possible.

4. The headrest (1) according to claim 3. The at least one lighting device (4) is configured to illuminate at least one area of ​​the lock (5) that is particularly capable of being manually actuated, particularly as needed, at least partially or partially, or at least indirectly.

5. The headrest (1) according to any one of claims 1 to 4. The at least one lighting device (4) mentioned above includes the following components: Light source support members (6, 9), particularly light source support members in the form of printed circuit boards, said light source support members having at least one light source (7), preferably a light source in the form of an LED; and A light diffuser (8) is optically coupled or capable of being coupled to the at least one light source (7) via at least one light incident region, wherein the light diffuser includes at least one light emitting region through which light can be decoupled to preferably directly illuminate or illuminate an area of ​​the at least one headrest bar or a portion thereof.

6. The headrest (1) according to claim 5. The light diffuser (8) includes a body formed, in particular at least partially, of a transparent or translucent material, the body particularly including a material-free channel through which the headrest bar or part of the headrest bar is guided, wherein the body of the light diffuser (8), in particular at least partially, of a transparent or translucent material, is preferably embodied, at least partially or partially, as a hollow cylinder.

7. The headrest (1) according to any one of claims 1 to 4. The at least one lighting device (4) mentioned above includes the following components: A ring light source support (9) having at least one light source (7) and particularly having multiple light sources (7), the light source preferably being in the form of an LED, wherein one of the two headrest rods or headrest rod portions is guided through the ring light source support (9).

8. The headrest (1) according to any one of claims 1 to 7. The headrest guide assembly includes a first guide sleeve body (3), which is associated with a first headrest rod or a first headrest rod portion of the two headrest rods or two headrest rod portions, and the first headrest rod or the first headrest rod portion is at least partially or partially received or can be received in the first guide sleeve body; and The headrest guide assembly includes a second guide sleeve body (3), which is associated with a second headrest rod or a second headrest rod portion of the two headrest rods or two headrest rod portions, and the second headrest rod or the second headrest rod portion is at least partially or partially received or can be received in the second guide sleeve body.

9. The headrest (1) according to claim 8. The first guide sleeve body (3) is at least partially or partially received or can be received in a first receiving portion, which is embodied in or on the seat back of the vehicle seat (2), and wherein the second guide sleeve body (3) is at least partially or partially received or can be received in a second receiving portion, which is embodied in or on the seat back of the vehicle seat (2).

10. The headrest (1) according to any one of claims 1 to 9. The headrest guide assembly includes a tolerance compensation element (10) for compensating for any tolerance fluctuations in the distance between the two headrest bars or headrest bar portions that extend substantially parallel to each other.

11. The headrest (1) according to any one of claims 1 to 10 and at least according to claim 6, wherein the body of the light diffuser (8), which is at least partially formed of a transparent or translucent material, is at least partially arranged or formed in the first guide sleeve body (3) or the second guide sleeve body (3) of the headrest guide assembly.

12. A headrest guide assembly for a headrest (1) of a vehicle seat (2), the headrest (1) having two headrest rods, the headrest guide assembly being configured to slidably receive the headrest rods. Its features are, The headrest guide assembly includes an illumination device (4) configured to illuminate at least one of the headrest bars at least indirectly.

13. The headrest guide assembly according to claim 12, The lighting device (4) includes a light source support (6, 9) having a light source (7) and a light diffuser (8), wherein the light diffuser (8) includes a material-free channel through which one of the headrest rods is guided.

14. The headrest guide assembly according to claim 12, The lighting device (4) includes an annular light source support (9) having at least one light source (7), wherein one of the headrest rods is guided through the annular light source support (9).

15. The headrest guide assembly according to any one of claims 12 to 14, It also includes a first guide sleeve body (3) and a second guide sleeve body (3) for receiving one of the headrest bars, wherein the lighting device (4) is integrated in at least one of the guide sleeve bodies (3).

16. The headrest guide assembly according to any one of claims 12 to 15, It also includes a tolerance compensation component (10) for compensating for the tolerance variation between the distances of the two headrest bars.

17. The headrest guide assembly according to any one of claims 12 to 16, It also includes a sound insulation device for reducing noise between the headrest rod and the headrest guide assembly.

18. A method for illuminating the interior of a vehicle, the method comprising the following steps: - Provide a headrest (1) according to any one of claims 1 to 11; - Activate the lighting device (4) disposed in the headrest guide assembly to emit light; as well as - The light from the lighting device (4) is directed to illuminate at least one area of ​​the headrest bar that is visible outside the headrest guide assembly.

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