Helmet light, and safety helmet comprising a helmet light

Abstract

The invention relates to a helmet light (10) for attachment to a safety helmet (30), wherein the helmet light (10) can be switched into a plurality of different operating modes, in each of which the helmet light (10) emits light, and wherein, in a first operating mode of the plurality of different operating modes, the helmet light (10) illuminates a facial area of a user of the safety helmet (30) when the user is wearing the safety helmet (30). The invention also relates to a safety helmet (30) comprising such a helmet light (10).

Description

[0001] Helmet light and protective helmet with a helmet light

[0002] The present invention relates to a helmet light for attachment to a protective helmet, wherein the helmet light can be switched into several different operating modes in which the helmet light emits light, and to a protective helmet with such a helmet light.

[0003] Wearing a protective helmet is required for many types of work, particularly in forestry. A corresponding protective helmet, comprising a helmet shell with an interior comprising a head-contacting assembly consisting of at least a carrying basket, a headband, and a neckband, and means for attaching this assembly to the helmet shell, is known, for example, from document DE 87 14490 U1.

[0004] This well-known safety helmet represents a basic helmet that can be adapted to different tasks in different operating conditions by changing attachments. The safety helmet consists of a helmet shell and a minimum of internal fittings. The internal fittings consist of a cross-strap with which the helmet is worn on the head and which ensures an impact-absorbing distance between the head and the helmet shell. The safety helmet has a projection on its outer circumference that encircles the sides and rear of the helmet. This projection contains four recesses at the bottom for attaching the cross-strap and further recesses for attaching additional attachments. The basic version of the helmet can be used as a simple universal helmet without any attachments. The attachments can be added or removed as needed.

[0005] Helmet accessories that can be usefully attached to a safety helmet include a helmet light, which, similar to a headlamp, provides additional illumination of the helmet user's work area or other areas. Such additional illumination of the work area or other areas can be useful not only during dawn and dusk and after dark, but also in areas shielded from daylight, such as the twilight under a closed tree canopy. Furthermore, a helmet light that can be attached to a safety helmet can also be advantageous for a wide variety of activities. For example, nighttime repairs to construction machinery on construction sites or maintenance work in dark, poorly lit utility tunnels or under bridges can be carried more effectively and efficiently if a suitable lighting device in the form of a helmet light is carried "on the person" and ready for use.

[0006] In the context of a conventional lamp attached to a helmet shell, it is disadvantageous that the illuminated area of ​​the lamp is constant and always moves in the same way with the helmet shell worn by the user when the user moves or turns their head. This means that, in particular, a situation-adapted change in the illuminated area requires a manual adjustment of the position of the lamp attached to the helmet shell relative to the helmet shell. However, this is generally difficult to achieve while the user is performing an activity, especially without removing the helmet at least briefly, which poses a safety risk for the user.

[0007] The object of the invention is to provide a helmet light for a protective helmet of the type mentioned at the outset and known from the first-mentioned document and to improve it in such a way that a more flexible use of a helmet light is possible without additional safety risks for the user.

[0008] This problem is solved with the help of the subject matter having the features of the independent claims. Useful embodiments and further developments arise from the dependent claims.

[0009] The helmet light according to the invention is provided so that the helmet light can be switched into several different operating modes, in each of which the helmet light emits light. In a first of the several different operating modes, the helmet light illuminates a facial area of ​​a user of the protective helmet when the user is wearing the protective helmet. In the first of the several operating modes, the area illuminated by the helmet light is therefore the facial area of ​​the user and not, for example, a work area in front of the user, wherein the helmet light can be switched, for example, between illuminating the work area in front of the user and illuminating the facial area. Complicated mechanical realignment of the helmet light, which could endanger the user's safety, for example due to a protective helmet being temporarily removed, is eliminated.As is clearly evident from the wording of the claim, this involves switching between two different operating modes, with the helmet light being switched on and emitting light in each of the two operating modes, i.e., it is switched on in each case. The different operating modes can differ, in particular, in that the helmet light illuminates different areas in the vicinity of the helmet light. Illuminating a facial area is particularly advantageous when an opposing party needs to recognize the face of the protective helmet wearer, for example, in order to be able to show the opposing party a "familiar" face in otherwise poor visibility conditions and not appear as an anonymous, faceless figure. The illumination of the facial area can be achieved by lighting elements arranged in a face lighting unit, separate from a helmet light housing containing the actual helmet light.This face lighting unit can then, for example, be permanently positioned on an inner edge of the helmet, similar to the actual helmet light housing. It is also possible for the face lighting unit to be integrated directly into the helmet light.

[0010] Usefully, it can be provided that, in a second of the several different operating modes, the helmet light illuminates a work area of ​​the user of the protective helmet when the user is wearing the protective helmet. The user's work area can be considered the area directly in front of the user. The core area of ​​the illuminated work area, i.e., the light cone(s) emanating from the helmet light that directly illuminates an area, can, for example, start approximately 1 m in front of the user and end approximately 4 m in front of the user, assuming a height of the protective helmet worn by the user of 1.8 m and an orientation of the protective helmet "parallel" to the ground. A lateral opening angle, starting from the helmet light, of the core area of ​​the illuminated work area can be approximately 160°, so that a wide area to the right and left lies directly within the light cone(s).From this, a main beam direction and the shape of the light cone(s) that directly illuminate the core area of ​​the workspace can be easily determined. Furthermore, the workspace can be further defined in this way. The shape of the light cone(s) is determined by the Fresnel lenses used, each of which has a main beam direction and, if necessary, an "asymmetrical" beam angle. By illuminating the workspace, a narrowly defined area in front of the helmet light user is illuminated, simplifying their work, while simultaneously preventing any potential glare for other people working nearby.

[0011] Advantageously, it can be provided that, in a third of the several different operating modes, the helmet light illuminates a close-up area of ​​the user of the protective helmet when the user is wearing the protective helmet. The user's close-up area can be considered the spatial area in front of the user, extending slightly beyond the work area into the distance. The close-up area can, for example, partially overlap with the work area and be illuminated, in particular, when the user wearing the protective helmet is walking. The core area of ​​the illuminated close-up area, i.e., the light cone(s) emanating from the helmet light that directly illuminates an area, can, for example, begin approximately 2 m in front of the user and end approximately 6 m in front of the user, assuming a height of the protective helmet worn by the user of 1.8 m and an orientation of the protective helmet "parallel" to the ground.The lateral aperture angle, starting from the helmet light, of the core area of ​​the illuminated close-up area can be approximately 120°, so that to the right and left, a slightly narrower area than the working area lies directly within the light cone(s). From this, a main beam direction and a shape of the light cone(s) can be easily determined, which directly illuminate the core area of ​​the close-up area. Furthermore, the close-up area can be further defined in this way. The shape of the light cone(s) is again determined by the Fresnel lenses used, each of which has a main beam direction and a possibly "asymmetrical" beam angle.By illuminating the close range, a limited area in front of the user of the helmet light is illuminated, which allows reliable and timely detection of obstacles when walking, and at the same time minimizes any possible glare for other people working near the user.

[0012] It can also be provided that, in a fourth operating mode of the several different operating modes, the helmet light illuminates a distant area of ​​the user of the protective helmet when the user is wearing the protective helmet. The user's distant area can be considered the spatial area in front of the user, extending far beyond the near area into the distance. For example, the distant area can partially overlap with the work area and be illuminated in particular when the user wearing the protective helmet is walking or "gazing into the distance."The core area of ​​the illuminated long-distance area, i.e., the light cone(s) emanating from the helmet light that directly illuminates an area, can, for example, with an assumed height of the protective helmet worn by the user of 1.8 m and a "parallel" orientation of the protective helmet to the ground, begin approximately 5 m in front of the user and end approximately at infinity, and even point upwards toward the sky or run parallel to the ground, so that the illuminated core area does not formally end in front of the user, but extends to infinity. However, to reduce potential glare, the light cone emanating from the helmet light can be designed to hit the ground at a great distance, for example, at a distance of 100 m.The lateral aperture angle, starting from the helmet light, of the core area of ​​the illuminated long-distance field can be approximately 60° or less, so that only a small area to the right and left lies directly within the light cone(s). From this, a main beam direction and a shape of the light cone(s) can be easily determined, which directly illuminate the core area of ​​the long-distance field. Furthermore, the long-distance field can be further defined in this way. The shape of the light cone(s) is again determined by the Fresnel lenses used, each of which has a main beam direction and a possibly "asymmetric" beam angle. By illuminating the long-distance field, an area far in front of the user of the helmet light is illuminated, allowing reliable and timely detection of distant objects.

[0013] Furthermore, it can be provided that the helmet light comprises an external lighting module relative to a helmet light housing, which can be arranged on an outer side of a helmet shell of the protective helmet, wherein the lighting module has at least one helicopter LED, and wherein the helicopter LED emits light upwards in a fifth operating mode of the plurality of different operating modes when the user is wearing the protective helmet. Upwards here means radiation of the light towards the sky, assuming a user is standing upright and wearing the protective helmet correctly on their head. In this way, the user can be easily located from above, for example from a helicopter or a crane, thus increasing the user's safety because they are potentially better perceived and not overlooked.

[0014] Advantageously, the lighting module can be provided with at least one additional helicopter LED that has a different beam direction than the helicopter LED, wherein the helicopter LED and the at least one additional helicopter LED emit light in different directions in a sixth operating mode of the plurality of different operating modes. Depending on the color scheme and the precise arrangement of the helicopter LEDs used, this always allows light to be emitted upwards, regardless of the head position of the user wearing the protective helmet.Furthermore, if the LEDs are arranged on different opposite sides of the lighting module in such a way that they are also located on different sides of the protective helmet, it is also possible to allow at least a rough recognition of the user's viewing direction in the dark, for example, if an LED located on a "left" side of the protective helmet lights up green and the one on the opposite "right" side lights up blue.

[0015] Usefully, the helmet light's multiple operating modes can be switched in any combination. This allows the helmet light to provide flexible illumination suitable for the respective application. "Any combination" is understood to mean that multiple operating modes are available simultaneously in combination with one another.

[0016] It can also be provided that in each of the switchable operating modes of the helmet light, the brightness and / or color tone of the emitted light can be preset and / or adjusted. Adjusting the brightness and / or color tone can be referred to as changing the operating mode. The purpose of adjusting the brightness is obvious. However, adjusting the color tone, for example to a stronger yellow tone, can also be advantageous depending on the working environment. For example, a high yellow component can improve the user's visibility in foggy conditions. To easily adjust the luminous color of the helmet light, multi-colored LEDs can be used, which then have three different semiconductor crystals, each of which produces one of the three primary colors.

[0017] Advantageously, it can also be provided that, in each of the switchable operating modes of the helmet light, the brightness and / or color of the emitted light can be varied over time. This can further improve the visibility of the helmet wearer, particularly in conjunction with the helicopter LED(s).

[0018] A protective helmet with such a helmet light is also described. Exemplary embodiments of the invention, or some components and parts of the invention, are described in more detail below with reference to the drawings.

[0019] They show:

[0020] Figure 1 shows a three-dimensional view of a helmet light;

[0021] Figures 2a to 2f show further three-dimensional views of a helmet light from different viewing directions;

[0022] Figure 3a shows a three-dimensional isometric view of a helmet light in exploded view;

[0023] Figures 3b to 3e show a helmet light partly from different viewing directions;

[0024] Figures 4a and 4b show a lens unit of the helmet light from the back and from the front;

[0025] Figure 5a shows a controller board of the helmet light;

[0026] Figures 5b and 5c show a support element of the helmet light from above and from behind;

[0027] Figures 6a and 6b show a controller board of a helmet light from other viewing directions;

[0028] Figures 7a to 7c show a ventilation slide of a protective helmet from different viewing directions;

[0029] Figures 8a to 8j show three-dimensional external views of a battery pack from different viewing directions and in different operating states;

[0030] Figures 9a to 9c show three-dimensional representations of a connector plug from different viewing directions; Figures 9d and 9e show an internal structure of a connector plug from different viewing directions;

[0031] Figures 10a and 10b show a three-dimensional external view of a charging plug from different viewing directions;

[0032] Figures 10c and 10d show an internal structure of a charging plug from different viewing directions;

[0033] Figures 11a and 11b show three-dimensional representations of a charging port of a battery pack;

[0034] Figures 12a and 12b show an internal structure of a battery pack from different viewing directions;

[0035] Figures 13a to 13h show three-dimensional representations of a battery holder from different viewing directions;

[0036] Figures 14a to 14e show a helmet shell with a helmet light from different viewing directions;

[0037] Figure 15 shows a three-dimensional view of a helmet shell with a helmet light attached to it from below;

[0038] Figures 16a to 16c show detailed views of a helmet shell with a helmet light attached from below;

[0039] Figures 17a and 17b show detailed views of a helmet shell with attached battery holder from different angles;

[0040] Figure 18 shows a detailed view of a helmet shell with attached battery holder and inserted battery pack;

[0041] Figures 19 to 21 show frontal views of a protective helmet with attached helmet light; Figure 22 shows a detailed view of a protective helmet with attached

[0042] Helmet light from diagonally above;

[0043] Figure 23a shows a side sectional view through a protective helmet with a helmet light attached to it;

[0044] Figure 23b shows another side sectional view of a protective helmet with a helmet light attached to it;

[0045] Figure 24 shows a side exploded view of a protective helmet with various accessories; and

[0046] Figures 25a to 25i show parts of a graphical user interface for operating a helmet light.

[0047] In the following description of the drawings, the same reference symbols refer to the same or comparable components.

[0048] Figures 1 and 2a to 2f show three-dimensional views of a helmet light from different directions. Each illustrated helmet light 10 comprises a lens unit 14 with a glare shield 124 arranged thereon, as well as a main body, of which at least parts of a cooler element 20 and a cover element 22 can be seen in the figures. The cooler element 20 and the cover element 22 can, for example, as can be seen in Figure 1, be arranged on opposite sides of the main body of the helmet light 10 and can be fastened to one another, for example, by screws 23, each of which extends through the main body. Additional or exclusive gluing of the cooler element 20 and / or the cover element 22, instead of screw fastening, is also possible.Other alternative fastening options are also conceivable, for example, the use of a fastening element for the cooling element 20 and / or cover element 22 that cannot be removed without causing damage. This ensures, for example, that the helmet light 10 is easy to repair, but any tampering with the electronics of the helmet light 10 can be traced based on the damaged fastening element. The cover element 22 can consist of one or more parts that are firmly or loosely connected to one another. In the example shown, the cover element 22 consists of a single part.In the three-dimensional view shown in Figure 1, the cooler element 20 is located on the side of the helmet light 10 facing away from the viewer and is largely concealed by the cover element 22. For this reason, in order to clarify the connection between the cooler element 20 and the cover element 22 and also to give the viewer an idea of ​​the shape of the main body of the helmet light 10, concealed areas of the cooler element 20 are shown in dashed lines in Figure 1. The helmet light 10 has a plug connection 3000 and a connecting plug connection 3002 at opposite lateral end regions. The plug connection 3000 can, for example, be a USB connection, in particular a USB Type C connection. Instead of the arrangement of the two aforementioned plug connections shown in the figures, a joint arrangement on a single side of the helmet light 10 is also conceivable.However, the arrangement on opposite sides of the helmet light 10 has certain advantages with regard to cable routing, since the available space for mounting the helmet light 10 is limited, as will be explained below. In Figure 1, in addition to the plug connection 3000, a connection connection 3002a is shown, which can be provided in addition to or alternatively, in particular to the connection plug connection 3002, as required. The connection connection 3002a is located in Figure 1, for example, on the same side of the helmet light 10 on which the plug connection 3000 is provided. The connection connection 3002a is directly coupled to the main body of the helmet light 10 and, for example, firmly soldered to a controller board 18 associated with the main body of the helmet light 10. The connection plug connection 3002 and / or the connection connection 3002a can be used, for example, to connect accessories to the helmet light 10.Accessories for the helmet light 10 can, for example, be additional lighting elements that can be freely positioned or fixed to a helmet shell 36, for example, lighting elements that form a "helicopter LED," which will be described in more detail below. Also conceivable are additional lighting elements that can be attached to the edge of the helmet shell to provide face lighting. Such face lighting can be particularly advantageous during a rescue, since the protective helmet usually leaves the wearer's face in shadow, so that an already frightened person could potentially panic if they cannot recognize the helmet wearer approaching or cannot recognize them as a normal person, thus inadvertently hindering the rescue.The plug connection 3000 and the connecting plug connection 3002 can each, just like the connecting connection 3002a, be mounted on a circuit board carrying further electrical components of the helmet light 10, which will be described in more detail below in the form of the controller board 18 by way of example.

[0049] In the figures, the lens unit 14 is usually surrounded by the glare shield 124, which prevents or at least reduces the undesired escape of stray light from the lens unit 14. In this way, for example, wearing the helmet light 10 in the activated state can be made more comfortable for a user, since light emerging from the lens unit 14 does not directly enter the user's eyes. The glare shield 124 can be made of, for example, rubber, plastic, fiberglass, a metal sheet, or a similarly mechanically insensitive material impervious to visible light. The glare shield 124 can be removably fixed to the lens unit 14, for example by means of a clamping action. In this way, for example, the glare shield 124 can be replaced in the event of damage.This also makes it possible to adapt the glare shield 124 used to a glare shield 124 adapted for the respective application. For example, it is conceivable that the glare shield 124 is provided with an additional, partially translucent element (not shown) in the radiation direction of the lens unit 14 in order to modify the radiation characteristics / light intensity of the helmet light 10. Alternatively, the glare shield 124 can also be firmly and permanently connected to the helmet light 10, for example, by gluing or a non-destructively removable locking mechanism.

[0050] As already indicated, the helmet light 10 can further comprise a face lighting unit (not shown separately in Figure 1). With the help of this face lighting unit, a facial area can be illuminated by specially oriented lighting elements, which can be arranged separately from a "helmet light body" containing the helmet light 10 in a face lighting unit. This face lighting unit can then be fixedly positioned on an inner edge of a protective helmet, similar to the actual helmet light 10. It is also possible for the face lighting unit to be integrated directly into the helmet light 10. For example, the special lighting elements can be arranged on the back of the lens unit 14 such that they emit diffuse light past the glare shield 124 onto the user's face.In Figure 1, a connecting cable 24 can also be seen at the plug connection 3000, which ends at the end of the connecting cable 24 opposite the plug connection 3000 in a connecting plug 192, which will also be described in more detail below.

[0051] The helmet light 10 can be switched between several different operating modes, each of which is characterized by the fact that light is emitted from the helmet light, unless it is explicitly stated that one of the operating modes is intended to be the off state of the helmet light. The several different operating modes can be characterized, for example, by the fact that different areas in the vicinity of the helmet light 10 are illuminated without the helmet light 10 being moved in its position or orientation. Examples include face lighting, close-range lighting, work area lighting, long-range lighting, a helicopter light, and a position light.These individual, different lighting modes of the helmet light 10 can also be used / controlled in any combination with each other, which further increases the number of different operating modes.

[0052] The helmet light 10 can assume different operating states in each of the several different operating modes or can be operated in these states. For example, the illuminance, i.e., the brightness of the emitted light, can be changed. This change can, in particular, also be designed to be variable over time. In addition, the luminous color of the respectively controlled light-emitting elements of the helmet light 10 can also be variable and adjustable.

[0053] Figure 2a shows the helmet light 10 three-dimensionally from above, so that, in addition to the lens unit 14 with the glare shield 124, the connecting plug connection 3002 on the left side, and the plug connection 3000 on the right side, details of the cover element 22 can be seen. The cover element 22 has various elements, which serve in particular for the releasable fixation of the helmet light 10 to the helmet shell 36, which will be described in more detail below. For mounting the helmet light 10, the cover element 22 comprises at least four attachment points. Shown on the left side in Figure 2a are a rear retaining claw 116, a front retaining claw 112, and a retaining element 122. Symmetrically to this, the cover element 22 also comprises a rear retaining claw 118, a front retaining claw 114, and a retaining element 122 on the side shown on the right in Figure 2a.In total, the cover element 22 in the example thus comprises six attachment points, although more or fewer attachment points can be provided as long as at least four attachment points are provided. The functioning of the front holding claws 112, 114, the holding elements 122 and the rear holding claws 116, 118 is described in more detail below. The cover element 22 can be made of similar materials to the glare shield 124, whereby the cover element 22 is preferably made of an electrically insulating material, although this is not absolutely necessary. Figure 2a shows a central on / off switch (not designated in more detail), with the aid of which, for example, the helmet light 10 can be switched on and off.Since this on / off switch is hardly accessible when the helmet light 10 is mounted on the helmet shell 36, this on / off switch can be considered optional, for example to address basic functions of the helmet light 10 when the helmet light 10 is held in the hand by a user and is not mounted on the helmet shell 36.

[0054] The cooler element 20, which is particularly clearly visible in Figure 2b, faces away from the helmet shell 36 when the helmet light 10 is mounted and points toward the interior of the helmet. The cooler element 20 is provided with cooling fins 21 that improve heat dissipation and can dissipate heat generated during operation of the helmet light 10 to prevent the helmet light 10 from overheating. A switch 120 is provided in the center of the cooler element 20, which can be easily used to turn the helmet light 10 on / off even when the helmet light 10 is mounted. By operating the switch 120, the helmet light 10 can be switched, in particular, from a completely off state into a kind of standby mode, in which the helmet light 10 does not emit any light but can only be controlled using external controls.This can be considered a standby state in which as little energy as possible is consumed, while simultaneously allowing flexible control of the helmet light 10 at any time. It is conceivable that, for example, a visual and / or acoustic signal could be emitted upon actuation of the switch 120, signaling to the user that the helmet light 10 is ready for use or that it is switched off.

[0055] As already mentioned, the cooler element 20 and the cover element 22 form essential parts of the outer surfaces of the main body of the helmet light 10. The cover element 22 and the cooler element 20 thus also perform a mechanical stiffening and protective function, with the cooling fins 21 arranged on the cooler element 20 and a circumferential bead on the edge of the cooler element 20 contributing to further stiffening.

[0056] On the lens unit 14, several individual, separate round lenses are indicated, particularly in Figure 2e, which essentially serve to direct the light emission of the helmet light 10. The internal structure of the lens unit 14 with the lenses indicated here is explained below in Figures 4a and 4b.

[0057] The curved shape of the helmet light 10 is also clearly visible in Figures 2e and 2f. The opposing regions of the main body of the helmet light 10, on which the plug connection 3000 and the connecting plug connection 3002 are arranged, are inclined relative to the central region of the main body of the helmet light 10 in order to adapt to a curvature predetermined by a helmet shell 36 in its intended mounting position.

[0058] Figure 3a shows a three-dimensional isometric view of a helmet light 10 in an exploded view. The helmet light 10 visible in Figure 3a is shown in a simplified form. A controller board 18 can be seen between the cover element 22 and the cooler element 20. The controller board 18 can be designed, for example, as a printed circuit board and, in particular, can carry electronic components of the helmet light 10 that are connected to one another via conductor tracks arranged on the controller board 18. These electronic components can include, in particular, a control controller (not explicitly shown), which controls the various functions of the helmet light 10, for example, switching between several different operating modes and states, as well as switching the helmet light 10 on and off.It can further be provided that a small, independent battery cell is provided on the controller board 18, which enables short-term emergency operation of the helmet light 10 without an external battery pack 100. This emergency operation can, for example, be limited to diagnostic operation and / or enable rudimentary light emission, for example, for 10 minutes. Furthermore, the controller board can carry a sensor unit (also not shown in detail) or have a connection option for such a sensor unit, so that sensors of various types included in the sensor unit can acquire, process, and send data to the control controller. Possible sensors of the sensor unit can include infrared, ultrasonic, and twilight sensors. The provision of a backlight sensor and / or a gas sensor as part of the sensor unit is also possible. In addition, the sensor unit can also include an acceleration sensor.The sensor unit can also comprise a body temperature sensor and / or a humidity sensor. The sensor unit can also comprise a head detection sensor. It is also possible for the sensor unit to comprise a housing temperature sensor that detects the temperature of the helmet light 10. The sensors of the sensor unit can each be integrated into the helmet light 10 or, optionally only partially, provided as an external module, which can be arranged, for example, on the battery pack 100 or the ventilation slider 50.

[0059] For example, the control controller may be configured to receive a detected housing operating temperature value and to change an operating state of the helmet light based on the received housing operating temperature value. For example, the control controller may be configured to reduce a light output of the helmet light 10 if the detected housing operating temperature value of the helmet light 10 exceeds a tolerable temperature threshold T toi_max. Reducing the light output automatically means a reduction in the resulting waste heat and thus, in the long term, a reduction in the housing's operating temperature. This can, for example, prevent the ignition of combustible material in an explosive environment (flammable gases or dust in the air). The control controller can also be configured to switch off the helmet light 10 after issuing a warning signal if the detected housing's operating temperature exceeds an upper temperature threshold Tmax. This may be necessary if, despite previously taken measures, a temperature reduction could not be achieved and a further increase in temperature poses an immediate risk that the housing of the helmet light 10 could act as an "ignition spark" and could, for example, cause a dust or gas explosion.The control controller can also be configured to slowly bring the switched-off helmet light 10 into a selected operating state during a time interval Δt that is longer than the switch-on interval actually required to switch on the light-emitting elements, if the detected housing operating temperature value of the helmet light falls below a lower temperature threshold value Ti_light_min. This measure limits the amount of waste heat generated locally at the lighting elements at very low temperatures. This also reduces the resulting temperature gradients. This way, fewer temperature-induced stresses are generated at the solder joints and / or the circuit board, which could impair the functionality of the helmet light 10.Furthermore, the control controller can be configured to continuously increase the actual light output of the helmet light 10 during the time interval Δt until it reaches the desired light output in the selected operating mode. This also serves, for example, to reduce temperature gradients within the helmet light 10.

[0060] If the sensor unit comprises an infrared sensor, the sensor unit can be configured to capture sensor data from the infrared sensor, process it, and send it as processed sensor data to the control controller. The control controller can, in turn, be configured to receive the processed sensor data and switch the helmet light 10 between multiple operating modes and states based on the processed sensor data. Switching can occur whenever a predefined arm movement of a user wearing the protective helmet 30 is detected in the processed sensor data, for example, waving in front of the lens unit 14 at a certain speed. In this way, the helmet light 10 can be easily controlled without requiring particularly high levels of attention from the user. If necessary, the user can even hold tools in their hand during the operation.

[0061] The infrared sensor can be arranged on the controller board 18, for example, near the LED elements 1610. Thus, the infrared sensor is then arranged in the region of the lens unit 14 and thereby acquires sensor data essentially in an area in front of the lens unit 14. This enables a restriction / fixing of the control panel, so that unintentional activation of the helmet light 10 can be avoided. The sensor unit can also comprise an ultrasonic sensor, which can be arranged on the controller board 18 in a similar way to the infrared sensor near the LED elements 1610. The ultrasonic sensor can also be used to realize the advantages described in connection with the infrared sensor using an analogous procedure. The ultrasonic sensor can therefore also be arranged in the region of the lens unit 14 and acquire sensor data essentially in an area in front of the lens unit 14.This again enables the restriction / determination of the control panel, so that unintentional activation of the helmet light 10 can be avoided. The ultrasonic sensor is also suitable, if necessary, to enable operation by a user wearing special heat-insulating protective clothing. Switching can therefore occur, for example, if a predefined arm gesture of a user wearing the protective helmet 30 is detected in the processed additional sensor data of the ultrasonic sensor. Instead of or in addition to the infrared and / or ultrasonic sensor, the sensor unit can also comprise a twilight sensor. The sensor unit can then be configured to acquire sensor data from the twilight sensor, process it, and send it to the control controller as processed twilight data.The control controller can in turn be configured to receive the processed twilight data and to switch the helmet light 10 between the multiple operating modes and states based on the processed twilight data, in particular to switch it on when insufficient brightness is detected in front of the helmet light 10 in the processed twilight data. This enables partial automation of the operation of the helmet light 10, in particular automated switching on. By arranging the twilight sensor in the area of ​​the lens unit 14, sensor data is essentially recorded in an area in front of the lens unit 14, in particular in a work area. This enables the restriction of automatic operation such that automatic actuation of the helmet light 10, in particular switching on, only occurs when insufficient brightness is detected in the area in front of the helmet light 10.

[0062] If the sensor unit comprises a backlight sensor, the sensor unit can be configured to capture sensor data from the backlight sensor, process it, and send it to the control controller as processed backlight sensor data. The control controller can, in turn, be configured to receive the processed backlight sensor data and to switch the helmet light 10 between the multiple operating modes and states based on the processed backlight sensor data. This also allows for partial automation of the control of the helmet light 10. If the backlight sensor is directly hit by a light beam, i.e., the user is illuminated by another light source or another helmet light, it can be assumed that the helmet light 10 also directly illuminates the user of the other helmet light and may dazzle them.Accordingly, it is expedient to reduce the light output of the helmet light 10 of the user of the protective helmet 30 at least for as long as the backlight sensor detects the directly incident light beam, preferably even for a few seconds longer. As already mentioned, the backlight sensor is expediently part of the sensor unit and arranged in the area of ​​the lens unit 14 on the controller board 18, so that backlight sensor data is essentially recorded in an area in front of the lens unit 14. Due to the usual arrangement of the helmet light 10 above the user's eye area, it can then be assumed that the detection of strong backlight in this area is also associated with a glare from the helmet light 10 for the wearer of the light source from which the backlight emanates. This glare is at least reduced by the helmet light 10 reducing its own light output upon detection of the backlight.

[0063] To reduce the glare emanating from the helmet light 10, the control controller can be configured to switch the helmet light 10 from an operating mode in which a high beam is active to an operating mode or operating state in which a luminous range and / or intensity of the high beam is at least adjusted if, based on the processed backlight sensor data, it is detected that an incident backlight exceeds or falls below a threshold brightness. Reducing the glare emanating from the helmet light 10 is possible, in particular, by reducing the light rays reaching into the distance, for example, the high beam, by switching them off, throttling the intensity, or changing the direction of illumination so that the light is directed more toward the ground.The control controller can then be configured to perform the switching only when the incident backlight continuously exceeds or falls below the threshold brightness for a time interval Δt, wherein the time interval Δt is between 1 and 5 seconds, preferably between 2 and 3 seconds. In this way, it can be prevented that a light beam that only casually grazes the helmet light 10, which does not indicate actual, continuous glare of an opposing person, already triggers an adjustment of the operating mode or operating state of the helmet light 10. Several different threshold brightnesses can also be predefined or set in the control controller. The control controller is then configured to adjust the luminous range and / or intensity of the high beam when one of the several different threshold brightnesses is exceeded or fallen below.In this way, sufficient illumination of an area in front of the user of the helmet light 10 can be combined with a negligible glare effect for other oncoming users with their own light sources. Instead of oncoming users with their own light sources, the direction in which other users are located can also be determined with the help of passive light sources, such as reflectors or similar devices, and / or position beacons worn by the other users. The term "user" is to be interpreted very broadly here and includes, in particular, animals, such as dogs, especially working dogs, which, for example, assist in a tracking search or more generally in a search in poor visibility conditions and could potentially be distracted by strong glare during this search or tracking.If the sensor unit comprises a gas sensor, the sensor unit can be configured to acquire sensor data from the at least one gas sensor, process it, and send it as processed gas sensor data to the control controller. The control controller can, in turn, be configured to receive the processed gas sensor data and to switch the helmet light 10 between the multiple operating modes and states based on the processed gas sensor data. By having the helmet light 10 detect dangerous vapors via the gas sensor, at least one warning can be issued to the user, thus avoiding the problem of unknowingly staying in an area contaminated by dangerous vapors. The gas sensor(s) can be arranged in the region of a main body of the helmet light 10. Sufficient protected space is available on the main body of the helmet light 10 for this purpose, which can be used to arrange the gas sensor(s).Other positioning, for example on the ventilation slider, is also possible. The sensor unit can, with the aid of the gas sensor, be configured, for example, to detect a concentration of CO2 and / or CO. These gases are colorless and odorless and are particularly suitable for endangering the health of a user in an area contaminated with these gases in elevated concentrations. The control controller can then be configured to switch the helmet light 10 to an operating state in which a warning signal is emitted if the processed gas sensor data indicate a concentration of CO2 and / or CO that is above a gas threshold concentration. The warning signal can be emitted acoustically and / or visually. An acoustic output can, for example, be emitted via a loudspeaker that can be coupled to the helmet light 10. The loudspeaker can, for example, be part of an input device that can be coupled to the helmet light 10.An optical output can, for example, mean adjusting the light color emitted by the helmet light 10. For example, the helmet light 10 can emit or use a red light to illuminate the work area to indicate the hazard. By confronting the user with the warning signal, they are given the opportunity to take measures for their own protection, for example, to leave the endangered area. The sensor unit can also be configured to detect a concentration of a flammable gas via the gas sensor(s). Flammable gases can, for example, be ignited by the helmet light 10 itself or a tool operated by the user.In this context, it can also be provided that the control controller is configured to switch the helmet light 10 to an operating state in which at least one warning signal is issued if the processed gas sensor data indicate a concentration of the flammable gas that is above a gas threshold concentration. The warning signal can again be issued acoustically and / or visually. By confronting the user with the warning signal, they are given the opportunity to take measures for their own protection, for example, to leave the endangered area. Due to the risk of fire or explosion, it can also be provided to deactivate the helmet light 10 or at least reduce the light output after the warning signal. This can prevent an explosion or deflagration, since the heating of the helmet light 10 and the associated battery pack 100 may already be sufficient to cause ignition / explosion.

[0064] If the sensor unit comprises an acceleration sensor, the sensor unit can be configured to acquire sensor data from the at least one acceleration sensor, process it, and send it as processed acceleration sensor data to the control controller. The control controller can, in turn, be configured to receive the processed acceleration sensor data and to switch the helmet light 10 between multiple operating modes and states based on the processed acceleration sensor data. A change in a user's movement trajectory can be detected in the data from the acceleration sensor, so that, for example, a fall by the user can be detected by the control controller with the aid of the sensor unit. The control controller can then take appropriate measures. The at least one acceleration sensor can, in particular, be arranged in the region of a main body of the helmet light 10.However, other positioning options, such as on the ventilation slider 50, are also possible. The skin body of the helmet light 10 is protected beneath the helmet shell, allowing conclusions to be drawn, particularly regarding the user's head movement, based on the change in the movement trajectory. This is particularly advantageous for detecting a fall in the acceleration data. The sensor unit or acceleration sensor can detect acceleration in three non-parallel directions. This provides the most flexible data acquisition possible, allowing, for example, the detection of falls in any direction.

[0065] The control controller can be configured to switch the helmet light 10 to an operating state in which a position signal is output when the processed acceleration sensor data is above an adjustable acceleration threshold. If a fall of the user is detected, characterized, for example, by an abrupt acceleration in the z-direction (height), the position signal can facilitate the localization of the user. Outputting the position signal can, in particular, comprise switching on the helmet light 10 if it was previously switched off. Outputting the position signal of the helmet light 10 can further comprise activating position-indicating light elements, for example, one or more helicopter LEDs 4000, 4002a, 4002b. Outputting a position signal can further comprise a request to an input device coupled to the helmet light 10 to transmit a position signal.If the input device is a mobile phone or another input device equipped with a wireless communication capability, the transmission can, for example, comprise transmitting an emergency call via a radio communication channel, wherein the emergency call can also include GPS coordinates of the input device if the input device has them. Helicopter LEDs 4000, 4002a, 4002b can, in particular, be activated as part of a helicopter light, wherein the helicopter light further improves the visibility of the user, in particular from above, for example from a helicopter or a crane. In principle, the helicopter light is advantageous in all cases where the user of the helmet light should / must be perceived by other people who are at a significantly different height, which is also the case, for example, when working on facades, excavation work in open pits, working in treetops, and so on.

[0066] The acceleration sensor or the data provided by the acceleration sensor can also be used to determine whether the user is standing (no variation in the z-direction), walking (slow variation in the z-direction due to the pendulum motion with each step), or running (fast variation in the z-direction). Based on this, it is possible to control the helmet light 10 via the control controller in such a way that the "illumination range" of the helmet light 10 is adjusted depending on this variation in the z-direction, for example, work light when standing, close-range light when walking, and high-range light, or high-range light and close-range light when running. This can, for example, help prevent the user from tripping.

[0067] If the sensor unit comprises a possibly contactless body temperature sensor, the sensor unit can be configured to acquire sensor data from the at least one body temperature sensor, process it, and send it as processed body temperature sensor data to the control controller. The control controller can, in turn, be configured to receive the processed body temperature sensor data and switch the helmet light 10 between the multiple operating modes and states based on the processed body temperature sensor data. The body temperature sensor, or rather the data acquired by it, can detect, in particular, overheating or hypothermia of the user, which increases the user's safety, since the user cannot always detect these conditions themselves in a timely manner.By switching the helmet light 10, the user can be informed of a potentially health-endangering condition. Switching can, in particular, also include switching on the helmet light 10. The at least one body temperature sensor can be arranged in the region of a main body of the helmet light 10. The main body of the helmet light 10 provides a protected installation space. In particular, the sensor unit can detect a body temperature on a user's head when the user is wearing the protective helmet 30. From the main body, the body temperature sensor can perform a direct temperature monitoring / measurement on the user's head, which allows a good assessment of the user's general condition.Alternatively, it is also possible to provide a body temperature sensor similar to a heart rate belt directly on the user's body and connect it to the helmet light 10, for example, using a short-range radio interface. The control controller can then be configured to emit a warning signal when the processed body temperature sensor data exceeds a predetermined body temperature threshold value t. max. If this threshold value is exceeded, it can be concluded that the user is (about to) overheat. The warning signal can be issued visually, for example by a change in the light output of the helmet light 10, or acoustically, for example via a loudspeaker that is to be provided. If it is apparent from the recorded body temperature sensor data that the user has suffered heatstroke and needs help (significant overheating has occurred or the recorded body temperature continues to rise after the warning signal has been issued, whereby other sensor data can also be taken into account), the helmet light 10 can also issue an emergency signal, as previously described in connection with a fall. The control controller can further be configured to issue a warning signal if the processed body temperature sensor data exceeds a predetermined body temperature threshold value t min. If this threshold value is undershot, it can be concluded that the user is (impending) hypothermia. The warning signal can be issued visually, for example by a changed light output of the helmet light 10, or acoustically, for example via a provided loudspeaker. If it is apparent from the recorded body temperature sensor data that the user is already severely hypothermic and needs help (significant hypothermia is present or the recorded body temperature continues to drop after the warning signal is issued, whereby other sensor data can also be taken into account), the helmet light 10 can also be provided to emit an emergency signal, as previously described in connection with a fall.

[0068] If the sensor unit comprises a humidity sensor, the sensor unit can be configured to acquire sensor data from the at least one humidity sensor, process it, and send it as processed humidity sensor data to the control controller. The control controller can, in turn, be configured to receive the processed humidity sensor data and to switch the helmet light 10 between the multiple operating modes and states based on the processed humidity sensor data. Switching between the multiple operating modes and states can explicitly include switching on the helmet light 10. Furthermore, an increase in the yellow component in the emitted light can also be provided in order to better illuminate any fog-like mist or mist that may be present. The at least one humidity sensor can be arranged in the region of a main body of the helmet light 10.The main body of the helmet light 10 provides a particularly protected installation space. Other positioning options, such as on the ventilation slide 50, are also possible.

[0069] The helmet light 10 can include a fan unit, and in this case, the control controller can be configured to switch the fan unit on or off when the processed humidity sensor data exceeds or falls below a predetermined humidity threshold. Activating the fan unit associated with the helmet light 10 can generate an airflow, particularly under the helmet shell 36 of the protective helmet 30, to better remove any film of sweat that may be present, thereby increasing the comfort of the protective helmet 30 and lowering the user's body temperature. The fan unit can be arranged, for example, on the main body of the helmet light 10 or on the lower edge of the helmet shell 36. The fan unit is not shown in the figures, but it is obvious to a person skilled in the art how it must be designed to generate an airflow beneath the helmet shell 36.The fan unit can alternatively be arranged on or in the ventilation slide 50 and draw or blow the air flow through the ventilation openings 53 provided there. The fan unit can be powered by the helmet light 10 or directly by the battery pack 100. The control controller can also be configured to issue a warning signal if the processed humidity sensor data exceeds a predetermined humidity warning threshold. This 'warning level' can inform the user that the humidity in the ambient air may soon reach a problematic level.

[0070] If the sensor unit comprises a head recognition sensor, the sensor unit can be configured to acquire sensor data from the at least one head recognition sensor, process it, and send it as processed head recognition sensor data to the control controller, wherein the control controller is configured to receive the processed head recognition sensor data and to switch the helmet light 10 between the plurality of operating modes and states based on the processed head recognition sensor data. In this way, a partial automation of the control of the helmet light 10 can be achieved. Furthermore, the plurality of operating modes and states explicitly also include switching the helmet light 10 on and off, as well as other operating modes, in particular controlled based on the acquired data from the head recognition sensor. It can be provided that the head recognition sensor is arranged in the region of a main body of the helmet light 10.The main body of the helmet light 10 represents a protected installation space. Furthermore, the main body is arranged under the helmet shell of the protective helmet 30 and thus automatically close to the user's head, so that detection is relatively easy.

[0071] The head detection sensor can include a position sensor that detects a spatial position of the helmet light 10 as part of the head detection sensor data, processes it, and sends it to the control controller. By detecting the spatial position of the helmet light 10, a rough conclusion can be drawn as to whether the user is wearing the protective helmet 30 at all or what they are doing. Thus, the user will hold the helmet light 10 essentially "horizontally" most of the time while standing. The control controller can then be configured to activate a work light of the helmet light 10 if the head detection sensor data indicates that the helmet light 10 is pointing towards the ground.If the user tilts their head forward from a "horizontal orientation" of the helmet light 10 while looking straight ahead to perform an activity directly in front of them, the helmet light 10 is also tilted forward, so that activating the work light of the helmet light 10 is sensible and can be done automatically by the control controller. Similarly, the control controller can also be configured to activate a high beam of the helmet light 10 if the head detection sensor data indicates that the helmet light 10 is parallel to the ground or the sky. The head detection sensor can also include a distance sensor that acquires distance data as part of the head detection sensor data, processes it, and sends it to the control controller. The distance data can be acquired, in particular, within the helmet shell.In this context, the control controller may be configured to activate a work light or another light of the helmet light 10 when the head detection sensor data indicates that the user is wearing the protective helmet 30. This also contributes to a meaningful automation of the control of the helmet light 10.

[0072] If the sensor unit comprises a housing temperature sensor that detects a housing operating temperature value of the helmet light 10, the control controller can be configured to receive the detected housing operating temperature value and, based on the received housing operating temperature value, to change an operating state of the helmet light 10. As a result, for example, the heat development of the helmet light 10 can be limited in order to influence the detected housing operating temperature in a desired manner, in particular to limit it upwards. The control controller can, for example, be configured to reduce a light output of the helmet light 10 if the detected housing operating temperature value of the helmet light 10 exceeds a tolerable temperature threshold T toi_max. As a result, less electrical energy is converted into light, so that less waste heat is generated, which increases the housing temperature. As a further example, it should be noted that the control controller can be configured to turn off the helmet light 10 after issuing a warning signal if the detected housing operating temperature value of the helmet light 10 exceeds an upper temperature threshold T max. This procedure can directly contribute to preventing an explosion by presetting the temperature threshold below an "ignition temperature," for example, at 40°C. Depending on the gas and dust particles expected in the ambient air, the temperature threshold can be set differently to ensure compliance with legal explosion protection requirements. The warning signal can again be issued visually or acoustically, for example, as described above. The control controller can also be configured to switch the switched-off helmet light 10 to a selected operating mode during a time interval Δt if the detected housing operating temperature of the helmet light 10 falls below a lower temperature threshold value Δt_light_min.The slow heating prevents thermal stresses within the helmet light 10, particularly on the controller board and the solder joints located thereon. Furthermore, the control controller can be configured to continuously increase the actual light output of the helmet light 10 during the time interval Δt until the desired light output is reached in the selected operating mode. Since cracks are more likely to form at very low temperatures than at higher temperatures, it is advisable to generate a lower amount of waste heat at the beginning of each operating cycle, when the helmet light 10 is still comparatively cold.Likewise, it is again possible for the helmet light 10 to comprise a battery pack 100 with a temperature sensor that detects a battery pack operating temperature of the battery pack 100, wherein the helmet light 10 comprises a control controller configured to receive the detected temperature value and to change an operating state of the helmet light 10 based on the received battery pack operating temperature value. In this way, the control controller can take suitable measures to ensure that the battery pack 100 is kept within a tolerable temperature range, as already explained above. The control controller can furthermore be configured to activate an electrical heating unit arranged in a battery body 194 as long as the detected battery pack operating temperature value of the battery pack 100 falls below a lower temperature threshold value TBattery_min. In this way, the discharge cycle of the battery pack 100 can take place with the otherwise usual parameters.The control controller can also be configured to reduce the light output of the helmet light 10 if the detected battery pack operating temperature value of the battery pack 100 exceeds a tolerable temperature threshold TBattery_max. By reducing the light output, i.e., reducing the brightness of the helmet light 10, the electrical power drawn from the battery pack 100 is reduced, which directly reduces the resulting waste heat, so that the temperature of the battery pack 100 can drop, assuming a constant rate of waste heat dissipation to the environment. This can be advantageous, for example, in an explosive environment.

[0073] The actions described above of the various sensors, the sensor unit comprising these sensors, and the control controller can also be considered as processes performed by these various elements of the helmet light 10. Furthermore, it is possible to adapt the behavior of the helmet light 10 to different applications, for example, by "reprogramming" individual or all threshold values, changing / adapting the detected gestures / arm movements and the functions triggered by them, etc.

[0074] The controller board 18 is arranged primarily in the area of ​​the main body of the helmet light 10, but protrudes beyond the main body in its edge area facing forward in Figure 3a. The controller board 18 is supported flatly, in particular completely, by a support element 16 in order to ensure sufficient mechanical stability of the controller board 18. As can be seen in Figure 3a, the edge areas of the controller board 18 and the support element 16 can be angled relative to their central areas, wherein the laterally located angled areas of the controller board 18 can, for example, carry the plug connection 3000 and the connecting plug connection 3002 already known from Figures 2a to 2f, which are not shown in Figures 3a and 3b for the sake of simplicity.The controller board 18 and the support element 16 continue forward in Figure 3a toward the lens unit 14, thus connecting it to the main body of the helmet light 10. The controller board 18 can, for example, carry LED elements 1610 that generate visible light, which are connected to a corresponding energy source via electrical connecting lines on the controller board 18. The lens unit 14 comprises several lens elements that are not provided with separate reference numerals. Each of these lens elements can be assigned to one or more light-generating LED elements 1610 on the controller board 18. The lens elements bundle and focus the light emitted by the LED elements 1610 in the desired radiation direction. A cover 12 can also be seen in front of the lens unit 14, which cover can, for example, be designed to be replaceable.The cover 12 essentially serves to protect the lens unit 14, whose individual lens elements are sensitive to mechanical damage, in particular scratches.

[0075] It can be provided that the helmet light 10 has a housing temperature sensor (not explicitly shown), for example, on the controller board 18 or on an outer side of the helmet light 10. This housing temperature sensor can, in particular, detect a housing operating temperature value of the helmet light 10.

[0076] Figure 3b shows a three-dimensional representation of parts of a helmet light 10, viewed diagonally from below. Figure 3b particularly shows the cooler element 20 with its heat-dissipating cooling fins 21 and the further stiffening circumferential bulge. Furthermore, the centrally arranged switch 120 is also visible again. In the front area of ​​Figure 3b, a recess 25 is provided on the cooler element 20, which is located in the area of ​​the connector plug 3000 to be arranged there on the controller board 18, in order to protect it from excessive mechanical stress. On the opposite side, a corresponding recess on the cooler element 20 is not visible, but can nevertheless also be provided for the connector plug connection 3002 to be arranged there.The cooler element 20 is connected in a planar manner to the carrier element 16 which it conceals, so that heat generated during operation of the helmet light 10 passes from the controller board 18 through the carrier element 16, which is designed as a good heat conductor, to the cooler element 20 and is dissipated from there into the environment.

[0077] Figure 3c shows another three-dimensional view of parts of a helmet light 10, viewed obliquely from above. In the view selected in Figure 3c, only the controller board 18, the support element 16 arranged underneath, and the cover 12 are visible. The cover 12, in turn, conceals the lens unit 14 usually arranged underneath, which in turn conceals LED elements 1610 on the controller board 18. In the central area of ​​the controller board 18, unspecified through-holes are also visible, through which the cooler element 20 and the cover element 22 can be screwed together during assembly of the helmet light 10. Accordingly, the through-holes also extend through the support element 16.

[0078] Figure 3d shows further components of a helmet light 10 in a three-dimensional oblique view from above. Compared to Figure 3c, Figure 3d also shows the cover element 22 arranged on the controller board 18. The upper side of the cover element 22, visible in Figure 3d, with the on / off switch (not further identified), faces the helmet shell 36 when the helmet light 10 is mounted.

[0079] Figure 3e shows components of the helmet light 10 three-dimensionally from an oblique bottom view. At the viewing angle chosen in Figure 3e, the cover element 22 lies on the underside of the helmet light 10, which is facing away from the viewer, and the cover element 22 is therefore only partially visible. Furthermore, the cooler element 20 has been omitted, so that the underlying support element 16 is now visible. The controller board 18 is largely concealed by the support element 16, so that only some edges of the controller board 18 are visible. The plug connection 3000 and the connecting plug connection 3002 are also shown on the laterally angled areas of the controller board 18. Also visible are the through-holes in the controller board 18 and their continuation in the support element 16. In addition, from this viewing angle, further through-holes in the front angled area can now be seen, which also serve assembly purposes.Visible centrally on the support element 16 is again the switch 120, which now rests directly on the support element 16 and, if the cooler element 20 is mounted, is framed by it in a "crescent-like" manner. The switch 120 can be designed, in particular, in the form of a foil switch, with foil-like connecting lines being routed around an edge of the support element 16 and connecting the switch to corresponding terminals on the controller board 18.

[0080] Figure 4a shows a lens unit 14 of the helmet light 10 from the rear, and Figure 4b shows the lens unit 14 of the helmet light 10 from the front. The lens unit 14 has a number of directing units 1402 arranged next to one another. Seven individual directing units 1402 arranged next to one another are shown. The respective directing units 1402 serve to guide the light within the lens unit 14. The directing units 1402 are truncated conical in shape, with each of the directing units 1402 being assigned to a separate LED element 1610 and directing light emitted by the LED element 1610 from the rear to the front through the lens unit 14, with as little stray light to the side as possible being desired.This can be realized or at least supported, in particular, by the truncated cone-like design of the directing units 1402, whereby the light emitted by the respective LED elements 1610 is refracted back into the truncated cone due to the natural refraction of the beam at the boundary regions between the directing unit and the free space in between. An additional reflective coating of the truncated cone surfaces is conceivable and can be provided if necessary. The light emerging from the front of the lens unit 14 at the respective directing units 1402 initially reaches the area of ​​various Fresnel lenses 1400a, 1400b, and 1400c, with each of the directing units 1402 forming a pair with one of the Fresnel lenses 1400a, 1400b, and 1400c and leading into them.The various Fresnel lenses 1400a, 1400b, and 1400c are designed differently, with the three centrally arranged Fresnel lenses 1400c each having different main beam directions than the pairs of Fresnel lenses 1400b and 1400a arranged further out. It is of course possible to configure the lens unit 14 with more or fewer pairs of directional units 1402 and Fresnel lenses 1400a, 1400b, and 1400c. Furthermore, the intended main beam directions of the individual Fresnel lenses 1400a, 1400b, and 1400c can also be configured as needed. For example, the different main beam directions of the Fresnel lenses 1400a, 1400b and 1400c can be designed such that the Fresnel lenses 1400a are outer work light lenses, the Fresnel lenses 1400b are inner work light lenses and the Fresnel lenses 1400c are front light and high beam lenses, respectively.The lens element 14 can, for example, be formed as an injection-molded part made of transparent plastic with suitable light refraction properties. Individual Fresnel lenses 1400a, 1400b, 1400c can, in particular, also function as a diffuser. The various Fresnel lenses 1400a, 1400b, 1400c are used in different combinations to emit light in the various operating modes of the helmet light 10 in order to create the desired light cones for the respective operating mode to illuminate the different spatial areas, in particular the work area, the close-up area, and the long-distance area, around the helmet light 10.

[0081] The user's work area can be considered, for example, the spatial area directly in front of the user. A core area of ​​the illuminated work area, i.e., the light cone(s) emanating from the Fresnel lenses 1400a, 1400b, 1400c that directly illuminate an area, can, for example, start approximately 1 m in front of the user and end approximately 4 m in front of the user, assuming a height of the protective helmet 30 worn by the user of 1.8 m and a "parallel" orientation of the protective helmet to the ground. A lateral opening angle, starting from the helmet light 10, of the core area of ​​the illuminated work area can be approximately 160°, so that a wide area to the right and left lies directly within the light cone(s). From this, a main beam direction and a shape of the light cone(s) emanating from the "active" Fresnel lenses that directly illuminate the core area of ​​the work area can be easily determined.Furthermore, the work area can be defined in this way, whereby the exact boundaries of the light cone(s) can be modified depending on the application. The shape and boundaries of the light cone(s) are determined by the Fresnel lenses 1400a, 1400b, 1400c used, each of which has a main beam direction and, if necessary, an "asymmetric" beam angle. By illuminating the work area, a narrowly defined area in front of the user of the helmet light 10 is broadly illuminated, simplifying their work. At the same time, any potential glare for other people working near the user is prevented.

[0082] The near area adjacent to the work area in the distance can, for example, partially overlap with the work area and be illuminated, in particular, when the user wearing the protective helmet 30 is walking. The core area of ​​the illuminated near area, i.e. the light cone(s) emanating from the helmet light 10 that directly illuminates an area, can, for example, begin approximately 2 m in front of the user and end approximately 6 m in front of the user, assuming a height of the protective helmet worn by the user of 1.8 m and an orientation of the protective helmet 30 "parallel" to the ground. A lateral opening angle, starting from the helmet light 10, of the core area of ​​the illuminated near area can be approximately 120°, so that to the right and left, an area that is somewhat narrower than the work area lies directly within the light cone(s).From this, a main beam direction and a shape of the light cone(s) can be easily determined, which directly illuminate the core area of ​​the near field. The working area is thus closer and, just like the near field, sufficiently defined. The shape of the light cone(s) is again determined by the Fresnel lenses 1400a, 1400b, 1400c used, each of which has a main beam direction and, if necessary, an "asymmetric" beam angle. By illuminating the near field, a limited area in front of the user of the helmet light 10 is well illuminated, allowing reliable and timely detection of obstacles while walking. At the same time, any potential glare for other people working near the user is minimized.

[0083] The user's far zone can be defined as the spatial area in front of the user, extending far beyond the near zone into the distance. For example, the far zone may partially overlap with the work zone and be illuminated in particular when the user wearing the protective helmet 30 is walking or "gazing into the distance," i.e., looking into the distance with their head raised. This can be detected, for example, using a position sensor.The core area of ​​the illuminated long-distance area, i.e., the light cone(s) emanating from the helmet light 10 that directly illuminates an area, can, for example, with an assumed height of the protective helmet worn by the user of 1.8 m and a "parallel" orientation of the protective helmet to the ground, begin approximately 5 m in front of the user and end approximately at infinity, and even point upwards toward the sky, so that the illuminated core area does not formally end in front of the user, but rather extends to infinity. To reduce potential glare, however, it can be provided that the light cone emanating from the helmet light 10 hits the ground at a great distance, for example, at a distance of 100 m. A lateral opening angle, emanating from the helmet light, of the core area of ​​the illuminated long-distance area can be approximately 60° or less, so that only a small area to the right and left lies directly within the light cone(s).From this, a main beam direction and the shape of the light cone(s) can be easily determined, which directly illuminate the core area of ​​the long-range field. Furthermore, the long-range field can be sufficiently defined in this way. The shape of the light cone(s) is again determined by the Fresnel lenses used, each of which has a main beam direction and, if necessary, an "asymmetric" beam angle. By illuminating the long-range field, an area far in front of the user of the helmet light 10 is illuminated, allowing reliable and timely detection of distant objects.

[0084] The lens unit 14 may further comprise areas at the lower edge of its rear side that allow diffused light to be emitted toward a user's face when an associated LED element 1610 emits light. This diffused light may, in particular, constitute the essential part of facial illumination.

[0085] The lens unit 14 thus comprises a plurality of Fresnel lenses 1400a, 1400b, 1400c, which are arranged essentially side by side. The exact number of the plurality of Fresnel lenses 1400a, 1400b, 1400c can be adjusted as needed. The plurality of Fresnel lenses 1400a, 1400b, 1400c can further be divided into a first and a second subset of Fresnel lenses 1400a, 1400b, 1400c. The first subset of Fresnel lenses 1400a, 1400b, 1400c can then emit light, for example, when illuminating a work area of ​​the user of the protective helmet 30 when the user is wearing the protective helmet 30. The second subset of Fresnel lenses 1400a, 1400b, 1400c can in turn emit light when illuminating a distant area of ​​the user of the protective helmet 30 when the user is wearing the protective helmet 30.In this way, different areas can be illuminated by the helmet light 10 without moving the helmet light 10 itself or a protective helmet 30 to which the helmet light 10 is attached. Individual lenses of the plurality of Fresnel lenses 1400a, 1400b, 1400c can also function as a diffuser to counteract potential glare. This can apply in particular to the components of the helmet light 10 that are used to illuminate an area of ​​the user's face. Light can be emitted via a part of the first subset of Fresnel lenses 1400a, 1400b, 1400c, while at the same time light is also emitted via a part of the second subset of Fresnel lenses 1400a, 1400b, 1400c, for example in order to illuminate a close-up area of ​​the user of the protective helmet when the user is wearing the protective helmet 30.In this way, a stepped, gradual transition in the illumination between the work area and the long-distance area can be achieved, for example to illuminate a close-up area located between the work area and the long-distance area, which partially overlaps with the work area and the long-distance area. A glare shield surrounding the lens unit 14 can be provided to prevent light from the lens unit 14 from unintentionally falling directly onto the user's face, in particular into the user's eyes. The lens unit 14 can be made of a transparent material that attenuates yellow light the least in the visible frequency range. Alternatively, it is also conceivable for a cover 12 to be removably arranged in front of the lens unit 14 as part of the lens unit 14, said cover being made of a transparent material that attenuates yellow light the least in the visible frequency range.When the yellow component of the light generated by helmet light 10 is attenuated to the least, the yellow component of the emitted light is increased, resulting in a "yellower" appearance. This allows for better illumination of fog, in particular, as fog scatters visible yellow light less than visible light of other colors. As already mentioned, individual Fresnel lenses 1400a, 1400b, 1400c of the plurality of Fresnel lenses 1400a, 1400b, 1400c can have different main beam directions. In this way, light generated by helmet light 10 can be focused in different directions to illuminate different areas around the user of helmet light 10. Individual Fresnel lenses 1400a, 1400b, 1400c of the variety of Fresnel lenses 1400a, 1400b, 1400c can bundle emitted light to different degrees.If necessary, individual lenses can also act as diffuser lenses, fanning out the light beams generated by LED elements 1610 to achieve less point-like illumination. This allows for varying degrees of "brightness" as needed and, in particular, also enables more diffuse illumination of an area, for example, to counteract glare.

[0086] Figure 5a shows a controller board 18 of the helmet light 10. As already mentioned, the controller board 18 has conductor tracks 1608, which are not shown in Figure 5a for the sake of simplicity. Only a few electronic elements in the central region of the controller board 18 are indicated. Indicated in particular in the center is a mechanical switching element 1612, which can be provided for operating the helmet light 10. The lateral regions of the controller board 18 are, as previously shown, angled relative to the central region. To realize this angle, millings 1602 are provided, at which the controller board 18 can be bent into the desired shape. Furthermore, a plurality of bores 1604 are distributed over the controller board 18, which can assist, for example, in attaching the cooler element 20 and the cover element 22 during assembly.Light-emitting LED elements 1610 are also indicated in the front angled area. The LED elements 1610 can vary in their number and properties. For example, the lens unit 14 can be configured with "more" Fresnel lenses 1400a, 1400b, 1400c, and the number of LED elements 1610 can be increased accordingly. It is also possible for the LED elements 1610, or at least some of them, to be colored LED elements 1610 whose luminous color is adjustable. In addition to the illustrated LED elements 1610, which are each associated with individual Fresnel lenses 1400a, 1400b, 1400c of the lens unit 14, the controller board 18 can comprise further LED elements (not shown) which emit light in the direction of a lower edge of the controller board 18 or the lens unit 14, which light emerges there as diffused light and can constitute the essential part of the facial illumination.

[0087] Figure 5b shows a support element 16 of the helmet light 10 three-dimensionally from one side, while Figure 5c shows the same support element 16 three-dimensionally from the opposite side. Bends 1804 provided on the support element 16 can be seen, which delimit the central region of the support element 16 from the angled lateral regions, as well as various holes 1806, which can, in particular, correspond in their respective positions to the holes 1604 on the controller board 18. Furthermore, a large recess can be seen in the central region of the support element 16, with the aid of which the switch in the form of a mechanical switching element can be arranged directly on the controller board 18 and at the same time is accessible through the support element 16.However, this recess is optional, and any desired switch on this side of the controller board 18 or the helmet light 10 can alternatively be designed as a membrane switch without the recess. In this case, connecting lines are then routed around the carrier element 16 to the controller board 18. The carrier element 16 can, for example, be milled or punched from an aluminum sheet and bent into the desired shape. The carrier element 16 can, for example, be glued to the controller board 18, so that the controller board 18 and the carrier element 16 form a single unit, and heat emanating from the controller board 18 can be effectively dissipated via the carrier element 16.

[0088] Figure 6a shows a controller board 18 of a helmet light 10 from one side, while Figure 6b shows the same controller board 18 of the helmet light 10 from a different side opposite the side. The controller board 18 shown in Figures 6a and 6b also shows the plug connection 3000 and, on the opposite, laterally angled area, the connecting plug connection 3002. Furthermore, Figure 6a shows, by way of example, a mechanical switching element 1612 on the controller board 18, and the LED elements 1610 arranged on the angled area facing away from the viewer are also visible, which also applies to an edge of a frame 1616, which is described in more detail in connection with Figure 6b.In Figure 6b, on the other side of the controller board 18, a further mechanical switching element 1614 can be seen, which is enclosed by the frame 1616, which can serve, on the one hand, as an assembly aid for the carrier element 16 (centering function together with the central recess on the carrier element 16) and, on the other hand, protects the further mechanical switching element 1614 from undue forces. The frame 1616 can also frame other electronic components, for example capacitors and / or resistors, on the controller board 18 and protect them from mechanical forces. Alternatively, the side of the controller board 18 visible in Figure 6b can also be designed without the further mechanical switching element 1614 in an embodiment not shown, so that the associated / matching carrier element 16 can then, if necessary, be designed without the central recess.In this case, for example, a membrane switch can be provided, the connection of which is routed around the edge of the carrier element 16 from the controller board 18 to the side of the carrier element 16 facing away from the controller board 18, in order to implement the function of the further mechanical switching element 1614 there. Similarly, the mechanical switching element 1612 shown in Figure 6a can also be replaced, for example, by a membrane switch or another switching element.

[0089] Figures 7a, 7b, and 7c each show a ventilation slide 50 of a protective helmet 30 from different viewing directions. Figure 7a shows the ventilation slide 50 from above. Figure 7b shows the ventilation slide 50 from the side, and Figure 7c shows it obliquely from behind. The ventilation slide 50 is typically movably fixed to a helmet shell 36 of a protective helmet 30, for example, clipped in with the aid of a locking device. Locking lugs of the locking device, which can be arranged, for example, on the ventilation slide 50, are then movable / displaceable within a channel in a helmet shell 36 of the protective helmet 30, together with the ventilation slide 50, relative to the protective helmet 30, so that ventilation openings 53 visible in Figures 7a to 7c correspond to corresponding openings on the helmet shell 36 of the protective helmet 30, or are offset relative to them.In the offset position, the ventilation openings 53 are closed (by the material of the helmet shell 36), while in the other position, i.e., the matching position, the ventilation openings 53 are open, allowing air to exchange between the interior of the helmet shell 36 and the external space above the helmet shell 36. The ventilation slider 50 shown in Figures 7a to 7c comprises, in addition to the ventilation openings 53, a plurality of helicopter LEDs 4000, 4002a, 4002b arranged centrally. When the ventilation slider 50 is mounted on the helmet shell 36, and the helmet shell 36 is worn by a user as part of a protective helmet 30, the helicopter LEDs 4002a and 4002b point substantially upward when the user is standing, allowing the user to be easily located from above in the dark.The helicopter LED 4000 is positioned at an angle relative to the two other helicopter LEDs 4002a and 4002b, behind an edge 4004, so that the beam direction of the helicopter LED 4000 is also angled relative to the other helicopter LEDs 4002a and 4002b. In this way, when the ventilation slide 50 is worn by a user as part of a protective helmet 30, the helicopter LED 4000 can also be used to locate the user from above when the user is bent forward or lying down (for example, after a fall). For an upright user, the helicopter LED 4000 can be viewed or used as a "position light" radiating backward.Depending on requirements, additional LEDs can be provided on the ventilation slide 50, for example, to ensure the localization of the user wearing a protective helmet 30 with such a ventilation slide 50 in lateral directions. By providing additional LEDs on the sides of the ventilation slide 50 in different, easily distinguishable colors, the orientation or viewing direction of the user can also be indicated, at least roughly.For example, a first LED arranged on a left side when wearing the protective helmet 30 can radiate in a first color and a second LED arranged on a right side when wearing the protective helmet can radiate in a second color that is different from the first color, so that a distant observer can see, even in the dark, whether the wearer of the protective helmet 30 is turning his left side of his head or his right side of his head towards him, from which he can in turn deduce the approximate direction of view of the wearer of the protective helmet 30.

[0090] The helicopter LEDs 4000, 4002a and 4002b arranged in the ventilation slide 50 can, for example, be electrically connected to the helmet light 10, in particular via an electrical connecting cable which is, for example, connected to the helmet light 10 at the connector plug connection 3002 already known from Figure 1 or the connection connection 3002a.

[0091] At least one battery cell can also be arranged on the non-visible inside of the ventilation slide 50. In this way, the battery cell can be protected and firmly positioned, so that in particular unintentional brushing off or getting caught on obstacles can be reliably ruled out. The ventilation slide 50 can further comprise a curved ventilation slide base, not visible from the viewing directions shown, which essentially forms the inside of the ventilation slide and abuts with its edge against the inside of the outside of the ventilation slide, thereby forming a spatial volume in the ventilation slide 50 in which the at least one battery cell is arranged. In this way, encapsulation of the battery within the ventilation slide 50 is possible, so that it is even better protected.

[0092] The ventilation slide 50 can further comprise an electrical connector used to connect the at least one battery cell to an electrical load and / or an electrical charging source. The electrical connector thus enables, just like the connection of the battery pack 100 described in more detail below, a standardized connection between the battery cell in the ventilation slide 50 and the helmet light 10 or another electrical load. The electrical connector can be arranged on a lower edge of the outside of the ventilation slide, thus providing easy access or an easy electrical connection option.

[0093] The electrical connection can be oriented and arranged such that it can be moved together with the at least one locking lug in the groove on the helmet shell 36. In this way, it is possible to route the connecting cable 24 completely beneath the helmet shell 36, so that there are no outward-facing cable loops that could endanger the safety of the user. Alternatively, it is possible for the electrical connection to be oriented and arranged such that it can be moved parallel to the at least one locking lug in a further groove on the helmet shell 36. In this way, it is also possible to route the connecting cable 24 completely beneath the helmet shell 36, so that there are no outward-facing cable loops that could endanger the safety of the user.

[0094] Magnets and electrical contacts can also be provided in connection with the electrical connection, the advantages being analogous to the respective features in connection with the connection plug 192 described later. The magnets make it possible, in particular, to facilitate the blind connection of the connection plug to the battery cell, since the magnets pull the components of the plug connection into the correct position. A further electrical connection separate from the electrical connection can also be provided, which interacts with the electrical connection. The further electrical connection can be arranged on a lower edge of the outside of the ventilation slide so that it is easily accessible and a simple connection of a charger to the battery cell is realized.

[0095] It's also conceivable that the additional electrical connection includes magnets and electrical contacts. The magnets also make it easier to blindly connect a plug for charging the battery pack, as the magnets pull the connector components into the correct position.

[0096] Figures 8a to 8i each show three-dimensional external views of a battery pack 100. The illustrations have been partially simplified to avoid obscuring insignificant details. Figure 8a shows the battery pack 100 in the deactivated state. The battery pack 100 shown in Figure 8a comprises a substantially elongated and cuboid-shaped battery body 194, the edges of which are beveled, as shown in Figure 8a. Rounding the edges is also conceivable as an alternative. On one side of the battery body 194, Figure 8a shows a display and control element 102 in the inactive state. In the lower area of ​​the battery pack 100, a connector plug 192 can be seen, which is already known from Figure 1. Using the connector plug 192, the battery pack 100 can be connected to the helmet light 10. In Figure 8a, the battery pack 100 is shown in its deactivated state, so that consequently the display and control element 102 displays "nothing".However, it is conceivable that the display and control element 102 can be used to switch individual display elements on the display and control element 102 on and off and can accordingly also be "labeled" in order to identify the control element even when the power is off.

[0097] Figure 8b shows the battery pack 100 from a side opposite the display and control element 102 of Figure 8a, so that the rear of the battery pack 100 is visible. The rear of the battery pack 100 can be structured in various ways as required.

[0098] Figure 8c shows the battery pack 100 in an activated state. The display and control element 102 from Figure 8a, which is not separately labeled, displays various information for a user, in particular when the battery pack 100 itself is activated. The display and control element 102 can, for example, graphically display a temperature display 2000, a battery charge level display 2002, and an on / off button 2004, optionally with an LED backlight 2006. For this purpose, the display and control element 102 can have a display area 2008, below which an on / off switching element, in particular as a membrane switch, can be arranged, so that touching the displayed on / off button 2004 can, for example, switch the battery pack 100 or the connected helmet light 10 on and off. The temperature display 2000 can, in particular, graphically display the temperature of the battery pack 100.This can be important because the capacity and power output of the battery pack 100 varies with temperature. The display area 2008 can, of course, optionally also graphically display other or additional information about the helmet light 10 or the battery pack 100. For example, error messages from the helmet light 10 could be graphically displayed in the display area 2008 if the battery pack 100 is coupled to the helmet light 10 via the connector plug 192. A charging plug 190 can be seen below the connector plug 192 in Figure 8c. The charging plug 190 can be coupled to the battery pack 100 with the connector plug 192 interposed, as shown in Figure 8c. Alternatively, it is also possible for the battery pack 100 to be coupled directly to the charging plug 190 without an interposed connector plug 192.The LED backlight 2006, indicated in Figure 8c by hatching around the on / off button 2004, can, for example, also provide a "backlight function" for the user if required, since the orientation of the battery pack 100 when mounted on the protective helmet 30 allows for this functionality. Alternatively or additionally, one or more LEDs, particularly red ones, can be provided separately on the housing of the battery body 194.

[0099] The external view of the battery pack 100 shown in Figure 8d corresponds to Figure 8c with regard to the viewing angle shown. However, compared to Figure 8c, the battery pack in Figure 8d is shown in a different operating state. In the battery pack 100 shown in Figure 8c, the LED backlight 2006 is activated, which is indicated by the hatching used. In the battery pack 100 shown in Figure 8d, the LED backlight 2006 is deactivated, which is indicated by the absence of hatching. Similarly, hatching visible in the area of ​​the battery charge level indicator 2002 can visualize the current charge level of the battery pack 100. The temperature indicator 2000 can visualize the temperature of the battery pack 100, for example, by means of a color change or in another suitable manner.Alternatively, it is also conceivable that, near or instead of the symbol visible in Figure 8d, the temperature display 2000 directly displays the temperature of the battery pack 100 in digits. The on / off button 2004, shown, for example, in Figures 8c and 8d, can provide different functions. For example, the on / off button 2004 can switch a helmet light 10 connected to the battery pack 100 on or off. As long as no helmet light 10 is connected to the battery pack 100, the on / off button 2004 can, for example, put the battery pack 100 itself into various operating states. For example, it can be provided to query at least some of the information that can be displayed on the display area 2008 and, in particular, to activate or deactivate the battery charge level indicator 2002.The functions provided by the on / off button 2004 can be changed depending on the plugs connected to the battery pack 100, i.e., the charging plug 190 and the connecting plug 192. An internal logic circuit of the battery pack 100 detects which plugs are connected to the battery pack 100 based on measurable voltages at the connection contacts of the battery pack 100, which are described in more detail below. The special design of the charging plug 190 and the connecting plug 192 allows the connecting plug 192 and the charging plug 190 to be connected to the battery pack 100 simultaneously, so that, for example, several batteries can be connected to the helmet light 10 of the helmet light system simultaneously. Furthermore, the battery pack 100 can also be charged while the helmet light 10 is in use.

[0100] In addition to the helmet light 10, which can be switched to multiple operating modes and states, the helmet light system can comprise a transmitting and receiving module and an input device with a further transmitting and receiving module. The input device can then be connected to the helmet light 10 via the transmitting and receiving module and the further transmitting and receiving module in the form of a two-way communication. This allows the helmet light 10 to be controlled via the input device, and conversely, the input device can also receive operating information from the helmet light 10 when the helmet light 10 is connected to the input device. In this way, the input device can be positioned as an operating unit for the helmet light 10 and, in particular, can be arranged within the user's line of sight, thus simplifying operation of the helmet light system. The transmitting and receiving module and the further transmitting and receiving module can be wireless modules or wired modules.The two-way communication between the helmet light 10 and the input device can be established via a common communication protocol. The use of a common communication protocol also allows for more complex control of the helmet light system, which goes beyond simply closing an electrical circuit to turn it on and off. The control of the helmet light system can therefore be flexible.

[0101] The two-way communication used can be protected by encryption. This prevents unintentional unauthorized operation by any input device that accidentally connects to the helmet light 10 of the helmet light system. This is particularly useful when multiple helmet light systems, each with its own input device, are used close together. In this context, the entry of a password can be provided to secure the connection. The operating information received by the input device can also include status information of the helmet light system. The input device can then output the status information of the helmet light system. This also facilitates operation of the helmet light system. The helmet light 10 of the helmet light system can also be connected to another input device while it is already connected to the input device.It is possible for the helmet light 10 to be controlled primarily by the additional input device. This allows, for example, a priority operation by an operations commander or a monitoring system installed at a location, such as switching on a camera, a helicopter light, or a navigation light, if the helmet light system has such capabilities. Likewise, the deactivation of individual operating functions can be prevented by the higher-level authority.

[0102] The helmet light system, which already comprises at least one helmet light 10 with a control controller and can be switched to multiple operating modes and states by the control controller, can be supplemented with a camera unit, which is then functionally connected to the control controller. The control controller can activate the connected camera unit as soon as the helmet light 10 of the helmet light system is activated. It is also possible for activation to occur while the helmet light system is in standby mode and is not yet emitting any light. This allows for automated documentation of what the user of the helmet light system does and sees, and in particular, it can prevent the user from forgetting to comply with any documentation requirements.

[0103] The camera unit can store recorded videos internally. This allows for longer-term archiving. The camera unit can also send recorded videos to the helmet light 10, for example for storage in a memory integrated into the helmet light 10. This also allows for long-term archiving. Preferably, the control controller transmits videos recorded by the camera unit as operating information to an external storage device that can be connected to the helmet light system. This allows for a virtually unlimited documentation period. The external storage device can also be accessed by a third party, in particular for a visual display of the video, for example to provide assistance to the user of the helmet light system in the event of a problem. For example, to guide the user through the problem.For this purpose in particular, the helmet light system can comprise a headset through which the user can communicate with a third party who provides assistance. Communication can take place, for example, via a mobile phone connection, wherein the helmet light system is coupled, for example, to an input device providing the mobile phone connection, such as a mobile phone. The control controller can be configured to adapt a recording direction of the camera unit depending on an operating mode and / or an operating state of the helmet light 10. In this way, the quality of the images captured by the camera can be improved. In particular, a recording direction and a brightness of the captured image can be adjusted.

[0104] The control controller can also be configured to adjust the dynamic focal length of the camera unit depending on the operating mode and / or operating state of the helmet light. This can also improve the camera's recording quality. This can be achieved, for example, by adjusting the zoom, for example, to expand or narrow the viewing angle.

[0105] The properties of the helmet light system described above can also be generally implemented and realized within the framework of a method for operating a helmet light system, which can then be carried out by the control controller of the helmet light.

[0106] Figure 8e shows the battery pack 100 from the rear. In contrast to Figure 8b, the charging plug 190 is also connected to the battery pack 100 in addition to the connection plug 192. The functionality of the plugs is explained in more detail below.

[0107] Figures 8f and 8g show three-dimensional detailed views of a battery pack 100. Figure 8f shows a section of a top side of the battery pack 100, and Figure 8g shows a section of a side of the battery pack 100. A pair of locking lugs 212 can be seen on the top side. A lateral locking lug 210 is provided on the side of the battery pack 100. If a lateral locking lug 210 is provided on one side, another lateral locking lug can expediently be provided on the opposite side. The locking lugs 212 and the lateral locking lug 210 (as well as any additional lateral locking lug) can interact, in particular, with a battery holder 214, which will be described below, and fix the battery pack 100 in this battery holder 214 on the protective helmet 30.The locking lugs 212 and the lateral locking lug 210 are only shown in Figures 8f and 8g, but can also be provided in the battery packs 100 shown in the other figures.

[0108] Figures 8h, 8i, and 8j show the battery pack 100 from various angles without any plugs connected. The battery pack 100 shown in Figure 8h is in a switched-off operating state, so that the display area 2008 does not display anything. However, it is also conceivable that the display area 2008 shows at least the on / off button 2004 even in the de-energized state, for example in the form of a transparent film image. In the lower area of ​​the battery pack 100, electrical contact surfaces 1112c are visible on an end face 1124 of the battery body 194. Furthermore, a notch-like recess 1114a is visible, which serves to center the connection plug 192 or the charging plug 190 and, at the same time, prevents the plugs from shearing off the battery pack 100 laterally when mounted. Figure 8j shows the battery pack 100 from a different side, so that the recess 1114a on the front side 1124 of the battery body 194 is more clearly visible.In Figure 8i, the battery pack is illustrated such that the further end face of the battery pack 100 opposite the end face 1124 is visible, which, for example, can be completely smooth. However, if necessary, additional connection options, in the form of electrical contact surfaces, guide elements, or additional control elements, can also be arranged on this further end face.

[0109] Figures 9a, 9b, and 9c show three-dimensional representations of a connector plug 192 from different viewing directions. Figures 9a and 9c show a connection side of the connector plug 192 provided with an electrical contact 1108a. Clearly visible on this connection side is a projection 1116a, which, together with the recess 1114a visible, for example, in Figure 8j, forms a guide element that assists in positioning the connector plug 192 on the battery pack 100. The projection 1116a centers the connector plug 192 together with the notch 1114a of the battery pack 100 on the battery pack 100. In this way, a blind connection of the battery pack 100 to the battery connector 192 is possible. Figure 9b shows a representation of the battery connector 192 from the side opposite the electrical contact 1108a.

[0110] The electrical contact 1108a can comprise individual pin contacts. These pin contacts can, for example, be designed to be telescopically compressible, wherein, in particular, a preload can be provided for the extended state of the pin contacts. In this way, when the connection plug 192 is brought together with the battery pack 100, electrical contact closure can be reliably ensured by the resulting contact pressure, without there being any risk of bending of the electrical contact 1108a at the respective associated electrical contact surface 1112c, which can, in particular, be designed to be smooth or as a flat surface. The individual pin contacts can, for example, have spring-like elements to achieve the preload. Alternative designs are, however, also known to those skilled in the art. This design also allows the plug to be pulled off the battery pack from the side.

[0111] On the side opposite the electrical contact 1108a, which is shown in Figure 9b, i.e., the rear side of the battery connector 192, a recess 1114b is again provided. Furthermore, an electrical contact surface 1112a is also visible, wherein the electrical contact surface 1112a serves to electrically connect the connector plug 192 to the charging plug 190.

[0112] The entire interior of the connector plug 192 can be encapsulated using a potting compound 1110a. The potting compound 1110a then forms the housing of the battery connector 192. Alternatively, it can also be manufactured using housing shells, which are then tightly connected to one another to achieve a functionality analogous to that of the potting compound 1110a, in particular fluid tightness, of the housing. Providing interconnected housing shells can have advantages with regard to the interchangeability or inspection of the individual parts inside the connector plug 192, thus improving the environmental friendliness of the helmet light 10 as a whole.

[0113] With the help of the various possible and matching combinations of projections 1114a, 114b and recesses 1116a, 1116b, a simple joining aid for the plug connection can be realized. This does not hinder easy release when a tensile force is applied to the connector plug 192 and simultaneously ensures that, in the absence of a tensile force, the electrical contacts closed by the plug connection remain securely and, above all, correctly connected. If the respective projections and recesses are arranged asymmetrically on the contact surfaces, a simple anti-twist device is realized.

[0114] Figures 9d and 9e show a possible internal structure of a connector plug 192 from two essentially opposite viewing directions, so that one shows a front side and one shows a back side of the internal structure. Cable connections of the connector plug 192 leading away from the connector plug 192 have been omitted for the sake of simplicity. Inside the connector plug 192, concealed by the potting compound 1110a or a housing fulfilling the same function, there is a PCB 1106a on which the already known electrical contact 1108a is arranged. The electrical contact surface 1112a can be seen on the opposite side. Both the electrical contact 1108a and the electrical contact surface 1112a extend through the potting compound to the surface of the connector plug 192, so that additional elements on both elements can be electrically contacted with the connector plug 192.Two magnets 1104a are located in the side area of ​​the PCB 1106a. The magnets 1104a interact with corresponding counterparts in the battery pack 100 and the charging connector 190, respectively, so that reversed polarity of the electrical connections can be ruled out when connecting them. This serves as an additional safety measure. Furthermore, the magnets 1104a, together with the corresponding counterparts on the battery pack 100, automatically pull the connector 192 into the correct position and ensure a secure connection between the connector 192 and the battery pack 100, even under mechanical stress in the connecting direction.

[0115] This coupling and connection mechanism makes it possible for tangled cable loops of the connecting cable 24 to open if the user of a protective helmet 30 equipped with the helmet light system makes a careless movement while wearing the protective helmet 30. As soon as the tension on a tangled cable loop exceeds the holding force exerted by the magnets 204, 1104a, 1104b, the connecting plug 192 is automatically released from the battery pack 100 while the cable loop opens. Furthermore, connecting the connecting plug 192 to the battery pack 100 is facilitated because the magnets 204, 1104a, 1104b automatically pull the two components of the plug connection into the correct position, thus greatly simplifying the blind closing of the connection. Figures 10a and 10b show three-dimensional external views of a charging plug 190 from different viewing directions.The charging plug 190, already known from Figures 8d and 8e, also has a projection 1116b, similar to the connecting plug 192. Furthermore, an electrical contact 1108b is also provided on the same side of the charging plug 190. Analogous to the connecting plug 192, the housing of the charging plug 190 is also formed from a potting compound 1110b, whereby a fluid-tight construction consisting of individual housing elements, in particular housing shells, is also possible here. Unlike the connecting plug 192, no electrical contact surface is provided on the side of the charging plug 190 shown in Figure 10a, which is opposite the side with the electrical contact 1108b.With the help of the possible combinations of projection 116b and recess, a simple joining aid for the plug connection can be realized, which does not hinder the easy release in the event of a tensile force on the connection plug and at the same time ensures that in the absence of a tensile force the electrical contacts closed by means of the plug connection remain safely and, above all, correctly connected to one another.

[0116] In this context, it can be provided that the projection and the recess are each formed asymmetrically, preferably at an edge of the respective connecting surfaces. This provides a simple anti-twist device.

[0117] Figures 10c and 10d show a possible internal structure of a charging plug 190 from two essentially opposite viewing directions, so that one side of the internal structure is visible, the other side being a front side. Each shows a PCB 1106b of the charging plug 190 provided inside the charging plug 190, on which, analogous to the connector plug 192, electrical contact surfaces 1112b, an electrical contact 1108b, and magnets 1104b are also provided.

[0118] The structure of the illustrated PCB 1106b is thus largely similar to the structure of the PCB 1106a already known from Figures 9d and 9e. Since the PCB 1106b belongs to the charging plug 190, the PCB 1106b can have a different structure with regard to the illustrated electrical contact surfaces 1112b and the electrical contact 1108b, which in particular comprises fewer individual electrical contact pins of the electrical contact 1108b. This can be attributed to the fact that the charging plug 190 is usually attached last or is only temporarily connected to the battery pack 100, in particular while the connecting plug 194 is already attached to the battery pack 100, which must "pass through" the electrical contact 1108b of the charging plug 190 to the battery pack 100.In this context, it is conceivable, for example, that the PCB 1106b and the PCB 1106a are largely identical in their respective construction, but, depending on requirements, fewer electrical connections are routed outward to the surface of the charging plug 190. This can reduce the number of different parts if the same PCB can be used for the charging plug 190 and the connection plug 192 and, for example, only the assembly of electrical components, such as the electrical contacts 1108a and 1108b, varies.

[0119] Figures 11a and 11b each show a three-dimensional representation of a charging port of a battery pack 100. In the lower area of ​​both Figures 11a and 11b, the battery body 194 of the battery pack 100 is partially visible. In Figure 11a, the connector plug 192 is already attached to the upper end of the battery body 194. In the illustration selected in Figure 11a, the connection plug 192 comprises a circumferential sealing lip 196 pointing radially inward with respect to an axial longitudinal extent of the battery body 194. The sealing lip 196 is located in the axial direction below a protruding circumferential collar 196a of the connection plug 192. The sealing lip 196 serves in particular to produce a sealing connection, i.e., a fluid-tight connection, between the connection plug 192 and the charging plug 190 (not shown in Figure 11a), which can be placed onto the battery body 194 in the axial direction of extension thereof.This is relevant in that the electrical connection points between the connector plug 192 and the charging plug 190 would be subject to increased corrosion if moisture were to occur during an existing current flow between the connector plug 192 and the charging plug 190. In this regard, it should be noted that the connector plug 192, which was previously described in connection with Figures 9a to 9c, does not have such a collar 196a and no sealing lip 196, but can easily be supplemented with these elements. Alternatively, it is of course also conceivable that the collar 196a and the sealing lip 196 are not provided on the connector plug 192, but rather on the charging plug 190. This would then have the advantage that the electrical contact 1108b of the charging plug 190, which protrudes from the plane of the connector plug, would receive additional protection against mechanical damage from the collar 196a.Figure 11a also shows charging contacts 198 and communication contacts 200. The charging contacts 198 and the communication contacts 200 are located on the surface of the connector plug 192 enclosed by the sealing lip 196. Due to the arrangement of the charging contacts 198 and the communication contacts 200, a rotation-proof assembly of the charging plug 190 (not shown) can be realized. The special arrangement of the charging contacts 198 and the communication contacts 200 is to be understood as an example. In particular, the charging contacts 198 and the communication contacts 200 can be further subdivided. It is also conceivable that, in addition to the charging contacts 198 and the communication contacts 200 shown in Figure 11a, further contacts are provided on the surface of the connector plug 192 enclosed by the sealing lip 196.In the event that the electrical contact surface 1112a for the charging plug 190 on the connecting plug 192 is designed to be anti-twist, for example, half of the charging contacts 198 and the communication contacts 200 can be brought together inside the connecting plug 192 to thereby realize simple anti-twist protection. The connecting surfaces of the battery pack 100 and the connecting plug 192 shown in Figures 11a and 11b each have no projection or recess, as described, for example, in the previous figures, to realize anti-twist protection. However, these can be easily added.

[0120] Figure 11b shows the upper part of the battery body 194 of the battery pack 100 without the connector plug 192. Analogous to the free end of the connector plug 192, the connector plug comprises a sealing lip 208 arranged behind a collar 208a in an axial direction of extension of the battery body 194, which seal lip 208 encloses an end face of the battery body 194. An electrical contact surface in the form of communication contacts 202 and connection contacts 206 is again indicated on the end face of the battery body 194. The connection contacts 206 can be provided both for supplying a connected helmet light 10 with electrical energy and for charging the battery pack 100. It should also be noted that the respective communication contacts 200, 202 and the connection contacts 206 or the charging contacts 198 are shown set back from the respective end face, i.e. they are located below the respective outward-facing housing surface.This arrangement is optional; it can also be provided that all or at least some of the contacts are flush with the respective outward-facing housing surface. Furthermore, it is again possible to arrange the sealing lip 208 and the associated collar 208a on the connector 192. Furthermore, magnets 204 are indicated on the front side of the battery body 194, which can hold the connector 192 on the battery body 194 in a desired connection position. The sealing lip 208, like the sealing lip 196 on the connector 192, ensures water-protected electrical contact between the battery body 194 and the connector 192 that can be connected to it, or the charging plug 190, if the latter is connected directly to the battery body 194 for charging the battery pack 100. The magnets 204 are shown in Figure 11b on the visible surface of the front side of the battery body 194.However, they can also be arranged invisibly beneath the protective outer shell of the battery body 194, i.e., within the housing of the battery body 194, particularly to prevent corrosion of the magnets 204. The arrangement of the magnets 204 is optional. However, if the magnets 204 are present, with a suitable selection of the poles pointing away from the battery body 194, they can not only serve to fix a plug to be connected in a desired position, but also provide an anti-twist device, provided that the plug to be connected, the connection plug 192 or the charging plug 190, also has magnets with a suitable orientation.

[0121] Figures 12a and 12b show an internal structure of a battery pack 100 from different viewing directions. Two battery cells 1118 can be seen in each of Figures 12a and 12b. These battery cells 1118 have a conventional cylindrical shape in an axial direction of extension. On the surfaces facing downwards or rearwards in Figure 12a, which face forwards or upwards in Figure 12b, a PCB 1106d and a cover 1122 that is electrically insulated or insulating from the PCB 1106d can be seen. The cover 1122 can be made of sheet metal, for example, and be electrically insulated from the PCB 1106d. Also indicated on the PCB 1106d are electrical contact surfaces already known from Figure 11b, albeit in an arrangement that differs from that in Figure 11b.

[0122] In addition to the PCB 1106d, on the upward-facing surface of the battery cells 1118, there is another PCB 1106c on which a foil cover 1120 is indicated, which can have both a button and a display function for the battery pack 100. The button and display functionality of the foil cover 1120 was previously explained in connection with Figures 8c and 8d. The components shown in Figure 12b can, for example, be cast into the housing of the battery body 194 or otherwise integrated to form the battery pack 100, as indicated in the miniature representation in the upper right corner of Figure 12b, where the battery pack 100 is shown together with the connection and charging plugs 190, 192 (not further identified). The external shape of the battery pack 100 can, of course, be designed variably and, in particular, does not have to correspond exactly to the miniature representation.

[0123] A battery pack temperature sensor can also be arranged within the battery pack 100 or on its surface. This battery pack temperature sensor can detect a battery pack operating temperature value of the battery pack, which is transmitted, for example, to and received by a control controller of the helmet light 10. Based on the received battery pack temperature value, the control controller can then change an operating state of the helmet light 10, for example, to keep the battery pack 100 within a tolerable temperature range. The battery pack 100 further comprises an electric heating unit that can be controlled by the control controller, in particular based on the received battery pack temperature value. For example, the control controller can switch on the electric heating unit when the battery pack 100 falls below a lower temperature threshold value TAkku_min.The electrical heating unit can of course also be switched off temperature-controlled, advantageously hysteresis-like when another threshold value is exceeded, which is slightly higher than the lower temperature threshold TAkku_min. Furthermore, the control controller can also reduce the light output of the helmet light if the detected battery pack operating temperature value of the battery pack 100 exceeds a tolerable temperature threshold TAkku_max. By reducing the light output, i.e., reducing the brightness of the helmet light 10, the electrical power drawn from the battery pack 100 is reduced, which directly reduces the generated waste heat, so that the temperature of the battery pack 100 can drop, assuming a constant rate of waste heat dissipation to the environment. This can be advantageous, for example, in an explosive environment.

[0124] Figures 13a to 13h show various three-dimensional representations of a battery holder 214. The battery holder 214, each at least partially shown, comprises a frame 220 into which the previously described battery pack 100 can be inserted in an axial insertion direction. For this purpose, the frame 220 of the battery holder 214 has a substantially cylindrical outer structure with a rectangular base and rounded edges. As can be seen in Figure 13a, the frame 220 is narrowed at one end in the axial extension direction, so that the battery pack 100 cannot enter or exit the frame 220 on this side.On the opposite end face in the axial direction of extension of the frame 220, however, its cross-section is essentially not narrowed compared to the rest of the frame 220, so that the battery pack 100 can be inserted into the frame 220 of the battery holder 214 from this side. The cylindrical structure of the frame 220 of the battery holder 214 allows easy insertion of a battery pack 100 with a constant cross-section. The battery pack 100 can be secured in the frame 220 of the battery holder 214 via an elastic tab 224. With the help of the taper, a stop can be realized when inserting a battery pack 100 into the battery holder 214, with the tab 224 arranged at the other end simultaneously clamping the inserted battery pack 100 within the frame 220.The frame 220 of the battery holder 214 encloses the space in which the battery pack 100 can be arranged, leaving significant areas free, so that the battery pack 100 remains visible through the frame 220 of the battery holder 214. In this way, sufficient heat dissipation of the battery pack 100 during a charging / discharging process can be ensured, since the frame 220 does not additionally thermally insulate the inserted battery pack 100 from the environment.

[0125] Upper retaining arms 216a and 216b are also connected to the frame 220 of the battery holder 214. The upper retaining arms 216a and 216b each terminate in upper retaining hooks 218a, 218b, which ultimately serve to attach the battery holder 214 to a helmet shell 36. The upper retaining hooks 218a and 218b each include a step 223, the function of which will be explained in more detail later. Lower retaining hooks 222a and 222b are also arranged directly on the frame 220 of the battery holder 214. The upper and lower retaining hooks 218a, 218b, 222a and 222b together serve to securely fix the battery holder 214 to a helmet shell 36. The exact interaction of the upper and lower retaining hooks 218a, 218b, 222a and 222b with the helmet shell 36 will be described in more detail later.

[0126] The special design of the battery holder 214 described in Figures 13a to 13h serves to ensure the safety of a user of the protective helmet. Thus, by providing the upper and lower retaining hooks 218a, 218b, 222a, 222b, a fixed positioning of the battery holder 214 on the helmet shell 36 is achieved, which can nevertheless be easily detached if necessary. An object striking the protective helmet 30 from above, such as a branch, can slide down the protective helmet 30 and, if it should become caught on the battery holder 214, detach the battery holder 214 from the protective helmet 30 without the protective helmet 30 being torn from the head of a user wearing the protective helmet 30 and without the user experiencing the full impact force of the striking object.

[0127] The orientation of the open hooking sides of the upper retaining hooks 218a, 218b toward the open hooking sides of the lower retaining hooks 222a, 222b ensures that when an object impacts the protective helmet 30 from above and hits the battery holder 214, a release force is generated that initially loads the closed side of the upper retaining claws 218a, 218b, causing them to break under the force of the impact and thus initiate a release of the battery holder 214 from the helmet shell 30. At the same time, the lower retaining claws 222a, 222b are pushed down from the helmet shell 30 in their open direction, thereby completely releasing the battery holder 214 from the helmet shell 30.Since the open hooking sides of the upper retaining hooks 218a, 218b are larger than the open hooking sides of the lower retaining hooks 222a, 222b, as shown in the figures, the battery holder 214 can be easily attached to the helmet shell 30, since bending the upper retaining hooks 218a, 218b during the fastening process requires comparatively little force. At the same time, this configuration keeps the force required to break the upper retaining hooks 218a, 218b comparatively small, so that even detaching the battery holder 214 in an emergency, i.e., when an object strikes the protective helmet 30 from above, is simple and easy.

[0128] Figure 14a shows a helmet shell 36 with a helmet light 10 in a frontal view. The viewing direction also reveals the lens unit 14 of the helmet light 10, which faces the viewer. In particular, part of the fastening of the helmet light 10 to the helmet shell 36 is also visible in the frontal view shown. The fastening points in the form of the front retaining claws 112 and 114, already known from Figures 2a or 2c, for example, are hooked into a notch / groove 58 on a front edge 56 of the helmet shell 36. This is possible because the front edge 56 of the helmet shell 36 has a certain width, so that a notchable surface is provided there.The two front holding claws 112, 114 of the helmet light 10 are hooked into the notch / groove 58 provided there during assembly, wherein for this purpose an elastic deformation of the front holding claws 112, 114 or of the helmet shell 36 occurs when the helmet light 10 is pressed against the helmet shell 36 if the front holding claws 112, 114 are more elastic than the helmet shell 36. When the helmet light 10 has reached the assembly position, the elastic deformation is reversed and the front holding claws 112, 114 snap into the notch / groove 58 on the front edge 56. Alternatively, it is also conceivable that the helmet shell 36 is more elastic in the area of ​​the notch / groove 58 than the front holding claws 112, 114, so that the elastic deformation during assembly occurs essentially at the notch / groove 58, while the front holding claws 112, 114 remain essentially dimensionally stable.

[0129] Figure 14b shows a detailed view of a helmet shell 36 with a helmet light 10 attached to it. In Figure 14b, a different viewing direction is chosen compared to Figure 14a, so that the helmet light 10 is shown "from below" and thus also from "below" the helmet shell 36 is viewed. Visible parts of the helmet light 10 include the switch 120, the glare shield 124, the retaining elements 122 arranged on the right and left sides, and the cooling element 20 with its cooling fins and the surrounding bulge.

[0130] The curved shape of the cover element 22 ensures, particularly through the retaining elements 122 arranged at the right and left ends, that the helmet light 10 clipped onto the helmet shell 36 cannot slip sideways but remains securely fixed in a central position. As already mentioned, clipping is achieved, for example, with the aid of the front retaining claws 112 and 114, which are not visible in Figure 14b, in conjunction with the rear retaining claws 116, 118, which hook the helmet light 10 onto a reinforcing rib 62 of the helmet shell 36 on the side of the helmet light 10 opposite the front retaining claws 112 and 114.

[0131] Figure 14c shows a section of the helmet shell 36 from above. Figure 14d shows a section of a helmet shell with a helmet light attached to it, viewed diagonally from below. Figure 14c particularly shows the front edge 56 of the helmet shell 36 as well as a structure on the surface of the helmet shell 36 in the form of profile lines, which serve to stiffen the helmet shell 36. The profile lines present on the upper side of the helmet shell 36 can interact, in particular, with the aforementioned reinforcing rib 62 on the inside of the helmet shell 36 to achieve the desired mechanical stability. In Figure 14d, however, the helmet light 10 as well as the front edge 56 with the notch / groove 58 and the front retaining claws 112 and 114 hooked into it are more clearly visible.The notch / groove 58 on the front edge 56 also has a positioning aid for the helmet light 10 in the form of a web 110, which limits the mobility of the front holding claws 112 and 114 in the notch / groove 58 on the front edge 56 of the helmet shell 36.

[0132] Figure 14e shows a detailed view of the helmet shell 36, partially with the helmet light 10 attached, viewed from below. Visible in particular are the glare shield 124, the front retaining claw 112, one of the retaining elements 122, the switch 120, the cooler element 20 with the associated cooling fins and the surrounding bulge, the plug connection 3000, and the rear retaining claws 116, 118 hooked into the reinforcing rib 62. To mount the helmet light 10 on the helmet shell 36, the helmet light 10 is first inserted with its rear holding claws 116, 118 into the reinforcing rib 62 and then the helmet light 10 is pushed upwards diagonally in the direction of the front edge 56 of the helmet shell 36 so that the front holding claws 112 and 114 can each snap into the corresponding section of the notch / groove 58 on the front edge 56 of the helmet shell 36 after an elastic deformation of the fastening points involved and / or the helmet shell 36.The curved retaining elements 122 also contribute to a reliable, centered positioning of the helmet light 10 and can, for example, form a pincer-like structure with the front retaining claws 112, 114. As an alternative to hooking the front retaining claws 112, 114 into the notch / groove 58, a design not shown also allows for hooking onto another internal structure on the inside of the helmet shell 36, which, however, is at least closer to the edge of the helmet shell 36 than the internal structure in the form of the reinforcing rib 62, into which the rear retaining claws 116, 118 hook. The reinforcing rib 62 also serves, just like the structure visible on the top of the helmet shell 36 in Figure 14c, to stiffen the helmet shell 36.Extension-like branches 64 arranged from the reinforcing rib 62 on the inside of the helmet shell 36 can also contribute to the positioning of the helmet light 10 during and after its assembly on the helmet shell 36, since they can, for example, limit the possible positions of the rear retaining claws 116, 118 when inserting the helmet light 10 on the reinforcing rib 62.

[0133] Figure 15 shows a three-dimensional overall view of a helmet shell 36 with a helmet light 10 attached to it, viewed from below. A carrying basket 42 is indicated inside the helmet shell 36 shown in Figure 15, which will be described in more detail below and is an integral component of a protective helmet 30 with the helmet shell 36. In connection with the carrying basket 42, a clamping unit 48 is mentioned, with the aid of which the carrying basket 42 can be adjusted to the size of a user's head, particularly when putting on and taking off. Pointing to the right in Figure 15, the helmet light 10 is shown attached to the helmet shell 36 in the "front" area. Also visible in this front area is a face shield 32, which is connected to the helmet shell 36 via a bracket construction not described in detail in Figure 15 and is pivotably mounted thereon.In the left area of ​​Figure 15, which corresponds to the "rear" area of ​​the helmet shell 36, the battery holder 214 is indicated, which is intended to contain the battery pack 100. The helmet light 10 is coupled to the battery pack 100 located in the battery holder 214 via the connecting cable 24. The connecting cable 24 can be permanently or detachably coupled to the helmet light 10, as already explained in more detail in connection with Figure 1. On the opposite side of the helmet light 10, the connecting plug connection 3002, also already known from Figure 1, is also provided with an additional connecting cable 28 plugged into it. The connecting plug connection 3002, with the additional connecting cable 28 arranged thereon, can be used in particular to connect the "helicopter light" described in more detail above, to the helmet light 10.The battery holder 214 indicated in the rear area of ​​the helmet shell 36 can be fastened in particular to openings present in the helmet shell 36 via the upper holding hooks 218a, 218b only indicated in Figure 15, wherein the lower holding hooks 222a and 222b of the battery holder 214 are covered by further elements of the protective helmet 30 in the illustration chosen in Figure 15.

[0134] Figures 16a to 16c show further detailed views of a section of the helmet shell 36 with the helmet light 10 attached from below. Many of the components of the helmet light 10 shown are already known from the previous figures. In Figure 16c, in addition to the helmet light 10, a pair of protective goggles 130 can be seen, which is also part of the protective helmet 30, to which the helmet light 10 and the helmet shell 36 also belong. The protective goggles 130 are fixed to the helmet shell 36 in such a way that they can be pivoted relative to it. In this way, they can either be pivoted out of the helmet shell 36, so that they essentially serve as eye protection for a user wearing the protective helmet 30, or they can be pivoted back under the helmet shell 36.The helmet light 10 is located essentially within the helmet shell 36 between the protective goggles 130 and the helmet shell 36. In particular, the helmet light 10 is located in the free space that usually remains between the protective goggles 130 and the helmet shell 36 when the protective goggles 130 are pivoted back into the helmet shell 36. In addition to the protective goggles 130, Figure 16b also shows the carrying basket 42, which, viewed from the helmet shell 36, is located even further "inward" from the helmet shell 36, so that from the outside to the inside, first the helmet shell 36, then the helmet light 10, then the protective goggles 130, and finally the carrying basket 42 are located.

[0135] Figures 17a and 17b show detailed views of a section of a helmet shell 36 with a battery holder 214 attached thereto, viewed from different directions. The battery holder 214 is empty in each case, meaning, in particular, that no battery pack 100 is inserted into the battery holder 214. Openings are located on the helmet shell 36, which can be aligned with the ventilation openings 53, which in turn are provided on the ventilation slide 50, which was described by way of example in Figures 7a to 7c. The ventilation slide 50 is movably fixed to the helmet shell 36, so that the openings on the helmet shell 36 can be aligned with the ventilation openings 53 on the ventilation slide 50 (are open) or are displaced relative to one another, so that the openings on the helmet shell 36 are at least largely closed by the ventilation slide 50.The openings on the helmet shell 36 and the ventilation openings 53 on the ventilation slide 50 can in particular be arranged symmetrically to a plane of symmetry of the helmet shell 36 running from the rear, i.e. from the battery holder 214, to the front, i.e. to the helmet light 10.

[0136] Figure 17a shows an open state of the ventilation openings 53 during the assembly of the battery holder 214, while Figure 17b shows the closed state with the battery holder 214 mounted, in which the openings provided on the helmet shell 36 are largely covered by the ventilation slide 50.

[0137] The battery holder 214 is inserted with the upper retaining hooks 218a and 218b through the ventilation openings 53 provided on the ventilation slide 50 and the corresponding openings on the helmet shell 36, so that a step 223 can rest on the edge of the respective ventilation opening 53 and the respective upper retaining hooks 218a and 218b can engage the edge of the openings in the helmet shell facing the rear lower edge of the helmet shell 36. At the same time or subsequently, the lower retaining hooks 222a and 222b are pushed over the rear lower edge of the helmet shell 36, so that the lower retaining hooks 222a, 222b clip in due to the existing elasticity of the material of the battery holder 214, which allows a certain elastic deformation, particularly in the area of ​​the upper retaining arms 216a and 216b and the frame 220 of the battery holder 214. A different order for mounting the battery holder 214 on the helmet shell 36 is also possible.

[0138] In the assembly process associated with Figure 17a, the battery holder 214 can also first be hooked onto the lower edge of the helmet shell 36 using the lower retaining hooks 222a and 222b and then pushed forward / upward such that the upper retaining hooks 218a and 218b pass through the ventilation openings 53 and the openings in the helmet shell 36. This state is visible in Figure 17a. The upper retaining hook 218a does not yet engage the lower edge of the opening in the helmet shell 36. This changes when the battery holder 214 is released, since the elastic deformation of the battery holder 214 is reversed and the upper retaining hooks 218a and 218b engage downwards on the edge of the openings in the helmet shell 36.Due to the provided step 223, the displaceability of the ventilation slide 50 is largely retained, so that the openings provided on the helmet shell 36 can still be covered at least for the most part by the ventilation slide 50 and thus closed.

[0139] If an object strikes the helmet shell 36 from above, the upper retaining arms 216a, 216b allow for the greater flexibility of the battery holder 214, which was already helpful during the assembly of the battery holder 214 to the helmet shell 36, and also allow for a later breakage of the upper retaining hooks 218a, 218b, since part of the impact force of the object striking the helmet shell 36 and the battery holder 214 is initially dissipated as elastic deformation of the battery holder 214, in particular of the upper retaining arms 216a, 216b. If the upper retaining hooks 218a, 218b are ultimately broken due to excessive deformation, it is generally guaranteed that the battery holder 214 will detach completely from the helmet shell 36, fall downwards, and not just remain partially attached to the helmet shell 36.

[0140] The visible step 223 rests against an edge of the helmet shell 36 such that the ventilation slide 50, which is displaceably mounted relative to the helmet shell 36, can be displaced beyond the step 223 toward the edge of the opening in the helmet shell 36. This enables the ventilation slide 50 to further close the ventilation openings 53 in the helmet shell 53, through which the upper retaining hooks 218a, 218b engage into the helmet shell 36. Figure 17b shows a structuring of the ventilation slide 50, on which the LEDs known from Figures 7a to 7c are arranged on both sides of the edge 4004, namely the helicopter LED 4000 and the further helicopter LED 4002a, which have differing beam directions due to the edge 4004.The beam directions of the two helicopter LEDs 4000 and 4002a, visible in Figure 17b, can be designed essentially perpendicular to each other so that, for example, the helicopter LED 4000 can function as a "rear light" when the wearer is standing upright, while the other helicopter LED 4002a then shines upwards and is visible from above. However, if the wearer of the protective helmet 30 bends down, the helicopter LED 4000 shines upwards. Additional LEDs, for example, with a "lateral" beam direction, can be provided if necessary.

[0141] Figure 18 shows a partial detailed view of the helmet shell 36 with the battery holder 214 attached thereto and the battery pack 100 inserted. In the rear area of ​​the helmet shell 36, the two lower retaining hooks 222a and 222b are particularly visible, which encompass a lower rear edge of the helmet shell 36 and are arranged directly on the frame of the battery holder 214. A clamping unit 48 is also indicated below the helmet shell 36, which will be explained in more detail in connection with the previously mentioned carrying basket 42. The connecting cable 24 protrudes from the interior of the helmet shell 36 and extends into the battery holder 214. The connecting cable 24 establishes a connection between the helmet light 10 fixed in the front area of ​​the helmet shell 36 and the battery pack 100 inserted in the battery holder 214 via the connecting plug 192, which is not individually visible, wherein the battery pack 100 is held by the elastic tab 224 within the frame of the battery holder 214.

[0142] Figure 19 shows a first frontal view of the protective helmet 30 with the helmet light 10 attached thereto, while Figure 20 shows a second frontal view of the protective helmet 30 with the helmet light 10 attached thereto, and Figure 21 shows a third frontal view of the protective helmet 30 with the helmet light 10 attached thereto. In Figure 19, the helmet light 10 is shown in its assembled state, so that, on the one hand, the forward-facing lens unit 14 of the helmet light 10 can be seen, and, furthermore, the front retaining hooks 112 and 114 engaging in the notch / groove 58 are visible. The protective helmet 30 shown further comprises the face shield 32 which is pivotally fixed relative to the helmet shell 36 and which can be formed, in particular, from an open metal grid with a frame stiffening the metal grid in order to protect the face of a user 26 wearing the protective helmet 30 when folded downwards.A different choice of material, for example Plexiglas or a plastic grille, is also conceivable and can be provided as required. The protective function for the user 26 is particularly evident from Figure 20, in which the face shield 32 is angled downwards relative to the helmet shell 36 of the protective helmet 30 and is located in the line of sight between the user 26 and the observer. In Figure 21, the face shield 32, as in Figure 19, is angled upwards relative to the helmet shell 36 of the protective helmet 30. At the same time, however, the protective goggles 130, which are also provided, are angled downwards so that, like the face shield 32 previously in Figure 20, they are located in the line of sight between the user 26 of the protective helmet 30 and the observer. The purpose of the protective goggles 130 is, of course, in particular to protect the eyes of the user 26, be it from dust and dirt.

[0143] In conjunction with the protective goggles 130, a material selection of the protective goggles 130 adapted to the visual acuity of the user 26 can also be provided. This means that the protective goggles 130, which are also pivotably mounted relative to the helmet shell 36, can perform the function of a visual aid in the sense of glasses for the user 26.

[0144] Figure 22 shows a detailed view of a protective helmet 30 with a helmet light 10 attached, viewed diagonally from above. In Figure 22, the protective helmet 30 is shown with the face shield 32 facing upwards opposite the helmet shell 36. From this perspective, the front edge 56 of the helmet shell 36 remains visible, even though the notch / groove 58 previously visible in Figure 21 is located below the helmet shell 36 from the viewer's perspective, and the face shield 32 is also located between the helmet light 10 and the viewer from this perspective. Accordingly, the helmet light 10, just like the face of the wearer 26 of the protective helmet 30, is protected from external mechanical influences by the face shield 32.

[0145] The protective helmet 30, which is designed particularly for use in forestry, is shown with various features in Figures 23a and 23b, each in a side view, and in Figure 24 in an exploded view and partially in section. In Figure 24, an inner side of the helmet shell 36 is particularly visible. The protective helmet 30 comprises the face shield 32 and hearing protection 34. The protective helmet 30 further comprises the helmet shell 36 and an interior fitting assembly 40, which includes the carrying basket 42, a headband 44, and a neckband 46. The neckband 46 is equipped with the tensioning unit 48. The helmet shell 36 is provided on the outside with the ventilation slide 50, with which openings 52 formed in the helmet shell 36 can be opened and closed.

[0146] Three support arms designed as spacers serve as a means for a three-point attachment of the interior fittings or interior fitting assembly 40 to the helmet shell 36, with only two support arms 54 being visible in Figure 24. To lock the support arm 54 extending in the longitudinal direction of the helmet shell 36 to the helmet shell 36, the latter is provided with a slot in the occipital region, in which the correspondingly shaped free end of the longitudinally directed support arm 54 can releasably engage the helmet shell 36. The helmet shell 36 and the support arms 54 are dimensioned and arranged (i.e., dimensioned so long and so wide in their clear width) that there is a free space between the interior fitting assembly 40 and the helmet shell 36 to accommodate the helmet light 10, the associated cabling, ear muffs 35a of the hearing protector 34 and other helmet accessories as well as fastening devices for at least the face shield 32 and the hearing protector 34.Other helmet accessories include the already mentioned tensioning unit 48 of the neck strap 46.

[0147] The following briefly describes in detail the helmet shell 36, the interior fitting assembly 40, its connection to the helmet shell 36, and then individual parts of the helmet accessories, which include the hearing protection 34, the face shield 32, their fastening devices, and the clamping unit 48. The helmet shell 36 is formed as a one-piece plastic molded part. A suitable plastic for the helmet shell 36 is, for example, ABS.

[0148] The helmet shell 36 is projected forward to such an extent that it simultaneously functions as a visor above the eyes of the user 26. The helmet shell 36 therefore has a uniformly rising outer surface in its front region towards the rear without any significant steps, so that it offers no hooking points for obstacles such as branches. The transverse reinforcing ribs 62 are formed on the inner surface of the helmet shell 36 in the front and central helmet regions. A further reinforcing rib can be formed transversely to the reinforcing ribs 62 and centrally, extending in the longitudinal direction of the protective helmet 30. In the central region of the helmet shell 36, the reinforcing ribs 62 adjoin a slightly inwardly recessed region which has openings 52 in paired groups.In the recessed area on the outer surface of the helmet shell 36, the ventilation slide 50 is slidably arranged. The downwardly and inwardly projecting retaining knobs engage two front guide slots on the helmet shell 36 and two further retaining knobs engage two rear guide slots on the helmet shell 36. The ventilation slide 50 comprises the ventilation openings 53 (Fig. 24) arranged congruently with the openings 52, which are located above the openings 52 in the ventilation position and are offset in the closed position such that the openings 52 are closed by the ventilation slide 50. The lower edge of the protective helmet 30 is drawn downwards laterally in the region of the temples and laterally in the region of the back of the head. The above-mentioned free space between the interior fitting assembly 40 and the helmet shell 36 is thereby enlarged downwards in these areas.This facilitates the attachment of fastening devices to the inside of the helmet shell 36 and the stowing of the hearing protection capsules 35a in the free space between the helmet shell 36 and the carrying basket 42.

[0149] In the aforementioned temple area, three rod-like projections 74b are formed on each side of the inner side of the helmet shell 36, to which the interior fitting assembly 40 can be positively and releasably fastened with the lateral support arms 54. The rod-like projections 74b can be seen in the sectional view of the helmet shell 36 in Fig. 24. The rod-like projections 74b are each square hollow profile parts in cross-section, which are formed with a base region on the inner side of the helmet shell 36. In the area opposite the base region, the rod-like projections 74b are arranged freely in front of the inner surface of the helmet shell 36.The connection of the rod-like projections 74b to the inside of the helmet shell 36 and their transition to the helmet shell 36 in the area adjacent to the connection point in a triangular gusset is stiffened by additional molded ribs between the rod-like projections 74b and the helmet shell 36, so that the rod-like projections 74b are essentially rigidly connected to the helmet shell 36. If a force is exerted on the rod-like projections 74b transversely to their longitudinal direction, which tends to bend the rod-like projections 74b, the rod-like projections 74b tend to deform the helmet shell 36 accordingly.

[0150] At the rear end, the helmet shell 36 is provided with a recess 76 at the lower center edge. Behind this recess, the tensioning unit 48 of the neck strap 46 is located when the protective helmet 30 is fully assembled, allowing manual operation to tighten or loosen the neck strap 46. A hearing protection fastening device 80 for the hearing protection 34 has two hearing protection bearing points 80a on the inside of the helmet shell 36. The hearing protection bearing points 80a are pivot bearings that are integrally formed on the inside of the helmet shell 36 or, preferably, are permanently attached as additional parts. Support brackets 37a with the respective hearing protection capsules 35a are pivotally mounted in the hearing protection bearing points 80a.

[0151] A face shield fastening device 84 for the face shield 32 has two face shield bearing points 84a on the inside of the helmet shell 36. Retaining arms 132a of a visor 132 are pivotally mounted in the face shield bearing points 84a. The face shield bearing points 84a are not formed on the inside of the helmet shell 36, but rather each on a plug 136a, which is plugged onto the rod-like projections 74b, thus simultaneously securing the free ends of the support arms 54 to the rod-like projections 74b. When mounted, the face shield bearing points 84a, along with their associated plugs 136a, are located in the free space, specifically in an area in which the helmet shell 36 is pulled downward at its lower edge, as already explained above.

[0152] The interior assembly 40 is the part of the protective helmet 30 that contacts the head of the user 26 and consists of the carrying basket 42, the headband 44, and the neckband 46, which is equipped with the tensioning unit 48. The interior assembly 40 can be fixed to the helmet shell 36 by means of the support arms 54 in order to support and hold the protective helmet 30 on the head of a user 26.

[0153] The carrying basket 42 is formed from a rigid, elastically flexible material, preferably a plastic such as polyamide. The carrying basket 42 is provided in two temple areas and in one occipital area with a rigid support arm 54 projecting obliquely downwards and backwards, respectively. These support arms together serve to provide a three-point attachment of the interior fitting assembly 40 to the helmet shell 36. This arrangement enables the free space extending continuously around the interior fitting assembly 40 in the helmet shell 36, which in turn serves to accommodate ear muffs 35a, helmet light 10, and other helmet accessories, as well as fastening devices 80, 84 for the face and hearing protection 32 and 34, respectively. In the embodiment described here, the carrying basket 42 is manufactured as a one-piece plastic molded part.The carrying basket 42 can be formed from two pairs of spaced-apart carrying strips that intersect in the middle and merge into a single, circumferentially closed carrying strip at their lower ends at four connection points. A piece of cushioning material, particularly a cross-shaped one, can be provided that rests against the carrying strips to increase carrying comfort.

[0154] The support arms 54 can project from the support basket 42, particularly at the connection points. The headband 44 is integrally formed with the support basket 42. The neckband 46 has two front ends that are detachably connected to rear free ends of the headband 44, for example, by a snap-in connection not shown in detail. As shown in Figs. 23a and 24, the neckband 46 has two free ends that can be detachably connected to one another in the neck area, specifically with the aid of the tensioning unit 48. The neckband 46 can be formed from the same material as the support basket 42. The neckband 46 is connected to the support basket 42 in a height-adjustable manner between its connections to the headband 44 and its free ends. For this purpose, the support basket 42 has two downwardly projecting support arms, to which the neckband 46 can be fixed at a selectable height.The neckband 46 has three holes arranged one above the other on each side, which can be snapped into a spring-loaded bolt 49 projecting from each support arm.

[0155] In the example described above, the support arms 54 are attached to the helmet shell 36 in different ways, but this is not absolutely necessary. The support arms 54 can all be attached to the helmet shell 36 in the same way. For this purpose, only the different attachment methods need to be standardized.

[0156] For the three-point attachment of the interior fitting assembly 40 to the helmet shell 36, the rearwardly projecting support arm 54 is inserted into a slot provided for this purpose in the helmet shell 36 until projections provided on this support arm 54 engage on the outside of the helmet shell 36. The interior fitting assembly 40 is then moved further inward toward the inner surface of the helmet shell 36, with the laterally extending support arms 54 being slipped over the rod-like projections 74b. Through-openings in the laterally extending support arms 54 positively receive the rod-like projections 74b. When the laterally extending support arms 54 rest in the gusset between the helmet shell 36 and the rod-like projections 74b on the inside of the helmet, plugs 136a are plugged onto the rod-like projections 74b in order to fix the laterally extending support arms 54 in their position.The interior fitting assembly 40 and the helmet shell 36 are now firmly connected to one another at three points. Once the protective helmet 30 has been placed on the head and secured to the head with the aid of the tensioning unit 48, a chin strap (not shown) can be tightened under the chin if necessary. The through-openings in the laterally extending support arms 54 engage the rod-like projections 74b each over a length that is at least as large as the clear width of the through-openings. When a force is exerted on the support arms 54 by a load on the helmet 30 from above, the support arms 54 are subjected to a tensile load by the helmet shell 36, which is supported on the ends of the support arms. This force acting on the support arms 54 generates a moment at each of the three points that tends to deform the helmet shell 36 inward to the lower edge.The helmet shell 36 thus converts part of the force acting on it into deformation energy, thus reducing the force acting on the person wearing the protective helmet 30. The transmission of the moment from the support arms 54 to the helmet shell 36 is further enhanced by the fact that the support arms 54 are additionally stiffened by molded-on ribs.

[0157] The hearing protection 34 comprises ear muffs 35a, each pivotably mounted in a fork-shaped support bracket 37a. The helmet shell 36 is provided on its inside with fixed hearing protection bearing points 80a. Although the hearing protection bearing point 80a is shown together with the support basket 42 in Fig. 24, this bearing point is attached to the inside of the helmet shell 36 and not to the support basket 42. The illustration in Fig. 24 is merely intended to illustrate where the hearing protection bearing point 80a is located in space relative to the support basket 42 of the interior fitting assembly 40. The support brackets 37a, which are provided with the ear muffs 35a, are pivotally mounted in the hearing protection bearing points 80a. The hearing protection bearing points 80a and the support brackets 37a are arranged and designed such that the support brackets 37a can be pivoted between two positions in the free space. In an operating position, the ear defenders 35a cover the ears of the user 26.In a parking position, the hearing protection capsules 35a are stored in the free space in the helmet shell 36.

[0158] Each carrying strap 37a is designed to be spring-loaded and bendable in an area between its two ends, in which it extends into the free space, so that the ear defenders 35a are folded away from the ear when each carrying strap 37a is in the non-bent position, and are folded against the ear when the carrying strap 37a is in the bent position. When the protective helmet 30 is not placed on the head, the two ear defenders 35a in the latter part each reach a position that is significantly further inward than the ear against which each ear defender 35a is intended to rest. In other words, the mutual distance between the ear defenders is in this case significantly smaller than the mutual distance between the ears. This ensures that, when the protective helmet 30 is placed on the head, the ear defenders 35a are held against the ears by the spring preload.The spring preload for bending each support bracket 37a between two defined positions is provided by a ring-shaped bracket spring 92a. Each support bracket 37a can be manually moved into a bent and a non-bent position. In each of these positions, the bracket spring 92a acts as a locking device. The locking device of the support bracket 37a is not achieved when a protective helmet is worn because, as mentioned above, each earmuff 35a is designed to be held pressed against the ear by a spring.

[0159] Additionally, each hearing protection support point 80a and each support bracket 37a are designed so that the support brackets 37a can only be pivoted between the operating and parking positions. This ensures that the hearing protection capsules 35a can be stored in the space behind the ear without colliding with the ears and the lower edge of the helmet shell 36.

[0160] The face shield 32 is described in more detail below. Fig. 24 shows the protective helmet 30 in an exploded view and partially in section, with the face shield 32 visible in association with other helmet accessories.

[0161] The face shield 32 comprises the visor 132 with two holding arms 32a and two plugs 136a, each of which has a face shield bearing point 84a integrally formed thereon as a fastening device for the face shield 84. The plugs 136a are plugged onto the rod-like projections 74b, whereby the face shield bearing points 84a come to rest in the temple area on the inside of the helmet shell 36. The plug 136a with the face shield bearing point 84a can be seen in Fig. 24. The oppositely arranged parts of the fastening are not shown. Each face shield bearing point 84a has three axially projecting, elastically flexible cams 85a, over which the holding arms 132a with annular bearing bushes can be pushed in order to releasably and pivotably fasten the holding arms 132a in the face shield bearing points 84a.The face shield support points 84a and the support arms 132a are arranged and configured such that each support arm 132a is pivotable within the free space between two positions: an operating position in which the visor 132 is folded down and protects the face (Fig. 20), and a parking position in which the visor 132 is folded up and arranged in close contact with the outer surface of the helmet shell 36 (Figs. 21 and 22). The fastening device 84 for the face shield 32 includes a self-locking holder for each support arm 132a. For this purpose, each plug 136a includes a spring-loaded bolt which spring-loadedly holds the annular bearing bushing 134a attached to the support arms 132a in the operating position and the parking position.

[0162] The visor 132 forms a fork with each support arm 132a (Fig. 24), in which the wall of the helmet shell 36 is tightly received when the visor is open. When the visor 132 is closed, its upper edge rests on the front edge of the helmet shell 36, and the side edges of the visor 132 rest against the outer surface of the helmet shell 36. Therefore, neither with the visor closed nor with the visor open is there any possibility of branches becoming caught on the support arms 132a or on the visor 132 itself and endangering the user 26 when using the protective helmet 30, for example, during forestry work.

[0163] The tensioning unit 48 is briefly described below. In addition to the hearing protection 34 and the helmet light 10, the tensioning unit 48 is another helmet accessory which, like the hearing protection 34, always remains within the contours of the helmet shell 36, so that there are no protruding parts in the area of ​​the tensioning unit 48 that could catch on obstacles. The two ends of the neck strap 46 are detachably connected in the neck area by the tensioning unit 48. The tensioning unit 48 comprises a holder 168 into which the free ends of the neck strap 46 are inserted on both sides. The holder 168 has square knobs that can be engaged with square openings in the neck strap 46. In this way, the length of the neck strap 46 can be roughly adjusted to suit the head size. The adjustment is expediently carried out so that the protective helmet 30 can be comfortably put on when the tensioning unit 48 is not actuated.The tensioning of the neck strap 46, after the protective helmet 30 has been put on, is then carried out with the aid of the tensioning unit 48. The actuation of the tensioning unit 48 is carried out by means of a locking flap 174. By actuating the locking flap 174, a support shell 172 provided with a piece of padding material 180 is guided towards or away from the back of the head of the user 26.

[0164] Also visible below the helmet shell 36 is the helmet light 10, which is fixed to the front area of ​​the helmet shell 36. Furthermore, the battery holder 214, arranged on the outside of the rear area of ​​the helmet shell 36, is also visible; of the holding elements of the battery holder 214, only the upper holding hook 218a and the lower holding hook 222a are visible. Furthermore, the connecting cable 24 is indicated below the helmet shell. This cable runs from the helmet light 10 to the battery pack 100 arranged in the battery holder 214, which is also not visible. For the sake of simplicity, the connecting cable 24 is not routed along the lower helmet edge on the inside of the lower edge of the helmet shell 36, but rather transversely through the helmet shell 36 in the available space and through an opening in the helmet shell 36 directly to the battery pack 100.This may be intentional in that a connecting cable 24 running close to the lower edge of the helmet shell 36 could easily interact with objects outside the helmet shell 36 and, in particular, could be unintentionally pulled out of its intended position on the battery pack 100 by these objects. To avoid this, an adapted length of the connecting cable 24 is advantageous, and furthermore, a special recess / opening can be provided in the helmet shell 36 through which the connecting cable 24 can be guided in order to connect the helmet light 10 to the battery pack 100 in the battery holder 214.

[0165] Figures 25a to 25i each show parts of a graphical user interface for operating a helmet light. The individual views / representations of the parts of the graphical user interface can, for example, be displayed on a separate display, which can be connected wirelessly or wired to the helmet light 10. Various views of the graphical user interface are shown as examples, particularly in English and in black and white. However, it is of course clear to the viewer that different colors and / or languages ​​can be selected here.

[0166] The display, which shows the respective parts of the graphical user interface, can, for example, be part of a smartphone. The smartphone can then be coupled to the helmet light via a cable. For this purpose, one of the plug connections 3000, 3002 arranged on the helmet light 10 can be used, for example. The smartphone connected to the helmet light 10 via a cable can, of course, also be used as a power source for operating the helmet light 10 and, in particular, can also supplement or replace the battery pack 100. It is also conceivable for the smartphone to be used like a power bank to charge the battery pack 100. The smartphone can also be coupled wirelessly to the helmet light 10, wherein the helmet light 10 can comprise a short-range communication interface, for example a Bluetooth interface, for this purpose.

[0167] Various functions of the helmet light 10 can be controlled via the smartphone, in particular the graphical user interface displayed on the smartphone. Furthermore, as shown in Figure 25a, status information of the helmet light 10 can be displayed. For example, the temperature of the helmet light 10, in particular the temperature of the controller board 18 or of a temperature-sensitive element arranged on the controller board 18, can be displayed. Of course, a corresponding temperature of the controller board 18 or of another part of the helmet light 10 can also be detected by a temperature sensor arranged elsewhere on the helmet light 10 or in the helmet light 10. In this respect, an automatic temperature-controlled shutdown or power reduction of the helmet light 10 is possible in order to prevent damage to it. Furthermore, a temperature of the battery pack 100 can also be detected and displayed.Likewise, the voltage and current provided by the battery pack 100, as well as any charging current, can be detected and displayed by appropriately provided sensor elements. Furthermore, the charge level of one or more battery packs 100 that are electrically coupled to the helmet light 10 can also be displayed. The status overview can also contain information about which of the possible elements of the helmet light 10 and the other elements connected to it are currently active and with what (adjustable) brightness. For example, Figure 25a shows a walk light, a helicopter light, and a battery light as 100%, which corresponds to the maximum possible light emission of the respective lighting elements or lighting modes.A face light, on the other hand, is displayed as deactivated, while a work light is shown as partially activated, namely at 80% of its maximum possible light output. The respective status information can be presented either alphanumerically or using different color scales or color intensities, or as bar charts. It is also conceivable, for example, that various status information of the helmet light 10 is displayed alternately to improve readability, so that less information is displayed on the same area, but each one can be displayed larger.

[0168] The helmet light 10 can be operated, for example, using a touch-sensitive display, whereby additional information or functions can be activated or called up, for example, by tapping one of the various elements shown in the figures. Figures 25b and 25c visually depict some basic information about a helmet light 10 within an app that can be installed on a smartphone. The app can be used, in particular, to connect the smartphone to the helmet light 10 via a wireless connection, in particular Bluetooth. For this purpose, the helmet light 10 can first be activated via the switch 120. This activation puts the helmet light 10 at least into a standby mode, in which, for example, a connection establishment with the smartphone may be possible.

[0169] An initial screen of a user interface of the app in a (not yet) paired state is shown in Figure 25c, while Figure 25b shows the same initial screen in a (successfully) paired state.

[0170] On the one hand, the status of the connection to the helmet light 10 is indicated in the upper area by hatching, indicating that a connection is being established, and this is simultaneously indicated in text form as "Connecting." The hatching shown in Figure 25b can, in particular, indicate a striking color scheme of the input screen in the marked area. Once the connection is established, the display can be changed accordingly. Furthermore, in the lower area of ​​Figure 25b, a camera module of the helmet light 10, referred to as "PROTOS CAM," is marked as switched on and can be controlled via the corresponding button. The marking is again indicated by hatching, which can again represent a color contrast or a color change, and can additionally or alternatively be in text form.For example, the various buttons can change from red to green, which could correspond to an inactive or active state. It is also possible to indicate a change between a disconnected and a connected state by changing colors. The lower section of Figures 25b and 25c further indicates that the full range of functions of the various lighting modes that can be provided by the helmet light 10 can be made clear to the user with the help of one or more demo functions. These various demos can, on the one hand, illustrate the various basic functions of the helmet light 10 to the user in an initial phase and, on the other hand, particularly in a later phase of use, in which the user has already gained sufficient experience in operating the helmet light 10, serve to check the unrestricted functionality of the lighting modes to be provided.Similarly, Figures 25d to 25i also show various operating states of the helmet light 10 visually and / or in text form in the various views of the respective graphical user interface of the app. In particular, the hatched light cones visible in Figures 25d, 25f, and 25h in connection with the stylized user visualize various possible lighting modes of the helmet light 10. Figure 25d shows two light cones, the lower one corresponding to the walking light and the upper one to the work light. Figure 25f shows a light cone for a face light in the upper area near the stylized head of the user, and the light cone of the walking light individually in the lower area. Figure 25h, in turn, shows the light cone of a helicopter light. For the individual lighting modes, different light intensities between 0 and 100% can be selected independently or jointly.Furthermore, a short-term "turbo mode" can be provided, which lies outside the usual operating specifications of the LED elements 1610 used in the helmet light 10 and can temporarily increase the light output of the LED elements 1610 operated in this way. This functionality can be selected, for example, by continuously holding down a "Turbo" button shown in the various figures. Furthermore, the temperature display for the helmet light 10 can also be visible, whereby, for example, a permissible maximum temperature can be set via an associated control element. Above such a measured maximum temperature, a reduction in the power of the helmet light 10 can be provided. As can be seen in the lower part of Figure 25d, different light modes of the helmet light 10 can be switched in different ways, for example, pulsating with varying pulse durations.It may also be possible to increase the lighting intensity over time to avoid any glare when the helmet light 10 is switched on abruptly. Similarly, if the battery pack 100 is about to become depleted, it is also conceivable to switch off the helmet light 10 over time.

[0171] The features of the invention disclosed in the above description, in the drawings, and in the claims may be essential for the realization of the invention, both individually and in any combination. List of reference symbols

[0172] 10 helmet light

[0173] 12 Cover

[0174] 14 Lens unit

[0175] 16 support element

[0176] 18 Controller board

[0177] 20 Radiator element

[0178] 21 cooling fin

[0179] 22 Cover element

[0180] 23 Screw

[0181] 24 connection cables

[0182] 25 recess

[0183] 26 users

[0184] 28 additional connection cables

[0185] 30 protective helmet

[0186] 32 face protection

[0187] 34 Hearing protection

[0188] 35a hearing protection capsule

[0189] 36 helmet shell

[0190] 37a Support bracket

[0191] 40 Interior assembly

[0192] 42 carrying basket

[0193] 44 Headband

[0194] 46 neckband

[0195] 48 clamping unit

[0196] 49 bolts

[0197] 50 ventilation sliders

[0198] 52 openings

[0199] 53 Ventilation opening

[0200] 54 Support arm

[0201] 56 leading edge

[0202] 58 Notch / Groove

[0203] 62 Reinforcing rib 64 Branch

[0204] 74b rod-like projection

[0205] 76 recess

[0206] 80 Hearing protection fastening device

[0207] 80a Hearing protection bearing point

[0208] 84 Face shield fastening device

[0209] 84a Face protection bearing point

[0210] 85a cam

[0211] 92a bow spring

[0212] 100 battery pack

[0213] 102 Display and control element

[0214] 110 jetty

[0215] 112 front retaining claw

[0216] 114 front retaining claw

[0217] 116 rear retaining claw

[0218] 118 rear retaining claw

[0219] 120 switches

[0220] 122 Holding element

[0221] 124 Anti-glare protection

[0222] 130 Safety glasses

[0223] 132 Sight

[0224] 132a Holding arm

[0225] 136a plug

[0226] 168 bracket

[0227] 172 support shell

[0228] 174 locking flap

[0229] 180 pieces of upholstery material

[0230] 190 charging plugs

[0231] 192 connectors

[0232] 194 battery body

[0233] 196 sealing lip

[0234] 196a Collar

[0235] 198 Charging contact

[0236] 200 communication contacts

[0237] 202 Communication contact

[0238] 204 Magnet 206 Charging contact

[0239] 208 sealing lip

[0240] 208a Collar

[0241] 210 side locking lug

[0242] 212 locking lug

[0243] 214 Battery holder

[0244] 216a upper support arm

[0245] 216b upper support arm

[0246] 218a upper retaining hook

[0247] 218b upper retaining hook

[0248] 220 frames

[0249] 222a lower retaining hook

[0250] 222b lower retaining hook

[0251] 223 level

[0252] 224 tab

[0253] 1104a Magnet

[0254] 1104b Magnet

[0255] 1106a PCB

[0256] 1106b PCB

[0257] 1106c PCB

[0258] 1106d PCB

[0259] 1108a electrical contact

[0260] 1108b electrical contact

[0261] 1110a Potting compound

[0262] 1110b Potting compound

[0263] 1112a electrical contact surface

[0264] 1112b electrical contact surface

[0265] 1112c electrical contact surface

[0266] 1114a recess

[0267] 1114b recess

[0268] 1116a projection

[0269] 1116b projection

[0270] 1118 battery cell

[0271] 1120 foil cover

[0272] 1122 Cover

[0273] 1124 front side 1400a Fresnel lens

[0274] 1400b Fresnel lens

[0275] 1400c Fresnel lens

[0276] 1402 straightening unit

[0277] 1602 milling

[0278] 1604 bore

[0279] 1608 conductor tracks

[0280] 1610 LED element

[0281] 1612 mechanical switching element

[0282] 1614 additional mechanical switching element

[0283] 1616 frame

[0284] 1804 kink

[0285] 1806 drilling

[0286] 2000 temperature display

[0287] 2002 Battery level indicator

[0288] 2004 On / Off button

[0289] 2006 LED backlight

[0290] 2008 Display area

[0291] 3000 plug connection

[0292] 3002 connector plug connection

[0293] 3002a connection port

[0294] 4000 helicopter LEDs

[0295] 4002a additional helicopter LED

[0296] 4002b additional helicopter LED

[0297] 4004 Edge

Claims

Claims 1. Helmet light (10) for attachment to a protective helmet (30), wherein the helmet light (10) can be switched into a plurality of different operating modes, in each of which the helmet light (10) emits light, and wherein, in a first operating mode of the plurality of different operating modes, the helmet light (10) illuminates a facial area of ​​a user of the protective helmet (30) when the user is wearing the protective helmet (30).

2. Helmet light (10) according to claim 1, wherein, in a second operating mode of the plurality of different operating modes, the helmet light (10) illuminates a working area of ​​the user of the protective helmet (30) when the user wears the protective helmet (30).

3. Helmet light (10) according to claim 1 or 2, wherein, in a third operating mode of the plurality of different operating modes, the helmet light (10) illuminates a close range of the user of the protective helmet (30) when the user wears the protective helmet (30).

4. Helmet light (30) according to one of claims 1 to 3, wherein, in a fourth operating mode of the plurality of different operating modes, the helmet light (10) illuminates a long-distance area of ​​the user of the protective helmet (30) when the user wears the protective helmet (30).

5. Helmet light (10) according to one of the preceding claims, wherein the helmet light (10) comprises a lighting module external to a helmet light housing, which can be arranged on an outer side of a helmet shell (36) of the protective helmet (30), wherein the lighting module has at least one helicopter LED (4000), and wherein the helicopter LED (4000) emits light upwards in a fifth operating mode of the plurality of different operating modes when the user wears the protective helmet (30).

6. Helmet light (10) according to claim 5, wherein the lighting module has at least one further helicopter LED (4002a, 4002b) which has a different beam direction than the helicopter LED (4000), wherein the helicopter LED (4000) and the at least one further helicopter LED (4002a, 4002b) emit light in different directions in a sixth operating mode of the plurality of different operating modes.

7. Helmet light (10) according to one of the preceding claims, wherein the multiple operating modes of the helmet light (10) can be switched in any combination.

8. Helmet light (10) according to one of the preceding claims, wherein in each of the switchable operating modes of the helmet light (10) a brightness and / or a color tone of the emitted light can be preset and / or adjusted.

9. Helmet light (10) according to one of the preceding claims, wherein in each of the switchable operating modes of the helmet light (10) a brightness and / or a color tone of the emitted light can be varied over time.

10. Protective helmet (30) with a helmet light (10) according to one of the preceding claims.

Images