Helmet lamp, safety helmet comprising helmet lamp and method for operating helmet lamp

Abstract

The invention relates to a helmet lamp (10) for attachment to a safety helmet (30), the helmet lamp (10) comprising a controller and a sensor unit with a head recognition sensor and being switchable into a plurality of operating modes and operating states, the sensor unit is designed to detect sensor data from the at least one head recognition sensor, to process the data, and to transmit the data as processed head recognition sensor data to the controller, the controller is designed to receive the processed head recognition sensor data and to switch the helmet lamp (10) between the plurality of operating modes and operating states based on the processed head recognition sensor data. The invention also relates to a safety helmet (30) comprising such a helmet lamp (10) and to a method for operating such a helmet lamp (10).

Description

Field of the Invention

[0001] The present invention relates to a helmet light for fastening to a protective helmet, and to a protective helmet having such a helmet light and to a method for operating such a helmet light. Background Art

[0002] Many jobs, especially in the forestry sector, require the wearing of a protective helmet. For example, a corresponding protective helmet is known from DE 87 14 490 U1, which comprises a helmet shell having an interior fitting with a component for contacting the head, at least one support cage, a headband and a neckband, and the helmet shell includes means for fastening the component to the helmet shell.

[0003] This known protective helmet represents a basic helmet that can be adapted to various tasks under different usage conditions by changing the add-on elements. The protective helmet consists of a helmet shell and a minimal interior fitting. The interior fitting consists of a cross-shaped strap by means of which the helmet is worn on the head, and the cross-shaped strap ensures an impact-resistant distance between the head and the helmet shell. On the outer periphery of the protective helmet, the protective helmet has projections that surround the lateral and rear portions of the helmet and that include four recesses for fastening the cross-shaped strap and additional recesses for fastening additional add-on elements at its lower edge. This basic version of the helmet can be used as a simple universal helmet without any additional parts. Additional parts can be added or removed as required.

[0004] Helmet accessories that are to be fastened to a protective helmet in a meaningful way also include helmet lights that additionally illuminate, for example, the operating range of the user of the protective helmet or other areas (especially in a manner similar to a headlamp). This additional illumination of the operating range or other areas can be advantageous not only during dawn and dusk and after nightfall, but also in areas where daylight is blocked, such as under a closed tree canopy during twilight. In addition, helmet lights that can be fastened to a protective helmet can also be advantageous in most activities. For example, if a suitable lighting device in the form of a helmet light is carried by a person ready for use, maintenance work on construction machinery at night on a construction site or maintenance work in a dark, poorly lit supply tunnel or under a bridge can be carried out in a better and more efficient manner.

[0005] For the operation of the helmet light, it is always necessary for the user to actually wear the protective helmet. In addition, it is generally not desirable for the user to remove the protective helmet during the operation. If this occurs, this may indicate that the user has had an accident in which the protective helmet has fallen off the head. Moreover, at least partial automation of the helmet light operation can be desirable. Summary of the Invention

[0006] The object of the present invention is to improve the safety and comfort of users of a helmet lamp.

[0007] This object is achieved by a subject matter having the features of the independent claims. Advantageous designs and further developments result from the dependent claims.

[0008] According to the helmet lamp of the present invention, it is provided that the helmet lamp includes a control controller and a sensor unit having a head recognition sensor, and the helmet lamp can be switched to a number of operating modes and operating states, wherein the sensor unit is adapted to detect sensor data from the at least one head recognition sensor, process them and send them as processed head recognition sensor data to the control controller, wherein the control controller is adapted to receive the processed head recognition sensor data and, based on the processed head recognition sensor data, switch the helmet lamp between the number of operating modes and operating states. In this way, partial automation of the control of the helmet lamp can be achieved. In addition, the number of operating modes and operating states clearly also includes turning on and off the helmet lamp and waking up the helmet lamp from the standby mode and further operating modes, in particular controlled based on the detected data from the head recognition sensor.

[0009] Advantageously, it is provided that the head recognition sensor is arranged in the body area of the helmet lamp. The body of the helmet lamp represents a protected installation space. In addition, the body is arranged below the helmet shell of the protective helmet and is thus automatically arranged near the user's head, making the recognition of the presence of the user's head relatively simple.

[0010] Advantageously, it can be provided that the head recognition sensor includes a position sensor, and as part of the head recognition sensor data, the position sensor detects the spatial position of the helmet lamp, processes it and sends it to the control controller. By recognizing the spatial position of the helmet lamp, a rough conclusion can be drawn as to whether the user is actually wearing the protective helmet or what they are doing. Thus, for example, the user will keep the helmet lamp substantially "horizontal" most of the time when standing. In addition, when the protective helmet is removed or "upright" hung on a hook, the protective helmet is usually placed "upside down".

[0011] It can be provided that the control controller is adapted to activate the work light of the helmet lamp when the head recognition sensor data indicates that the helmet lamp is pointing to the ground. When the user takes the "horizontal orientation" of the helmet lamp and looks straight ahead, and the user tilts their head forward to perform a task directly in front of them, the helmet lamp also tilts forward, so it is useful to activate the work light of the helmet lamp and can be automatically done by the control controller.

[0012] In a similar manner, it can be stipulated that when the head recognition sensor data indicates that the helmet light is pointing parallel to the ground or towards the sky, the control controller is adapted to activate the high beam of the helmet light.

[0013] It can also be stipulated that the head recognition sensor unit includes a distance sensor, which, as part of the head recognition sensor data, detects distance data, processes them and sends them to the control controller. The detection of the distance data can in particular be carried out within the helmet shell.

[0014] In this context, it can be stipulated that when the head recognition sensor data shows that the user is wearing a protective helmet, the control controller is adapted to activate the working light or another light of the helmet light. This contributes to a useful automation of the control of the helmet light.

[0015] Furthermore, a protective helmet with such a helmet light is described.

[0016] According to the method of the present invention, it is stipulated that the helmet light includes a control controller and a sensor unit having a head recognition sensor unit, wherein, by means of the sensor unit, sensor data from the at least one body temperature sensor is detected and processed, and is sent as processed head recognition sensor data to the control controller, wherein, by means of the control controller, the processed head recognition sensor data is received, and based on the processed head recognition sensor data, the helmet light is switched between several operating modes and operating states. In this way, the advantages and details of the helmet light according to the present invention are also realized within the framework of the method.

[0017] It is useful to stipulate that when the head recognition sensor data indicates that the helmet light is pointing towards the ground, the working light of the helmet light is activated by the control controller.

[0018] Advantageously, it can be stipulated that when the head recognition sensor data indicates that the helmet light is pointing parallel to the ground or towards the sky, the high beam of the helmet light is activated by the control controller.

[0019] Furthermore, it can also be stipulated that when the head recognition sensor data shows that the user is wearing a protective helmet, the working light or another light of the helmet light is activated by the control controller. Description of the Drawings

[0020] In the figures:

[0021] Figure 1 A three-dimensional view of the helmet light is shown;

[0022] Figures 2a to 2f Additional three-dimensional views of the helmet light are shown from different viewing directions;

[0023] Figure 3aThe three-dimensional isometric view of the helmet light is shown in an exploded view;

[0024] Figures 3b to 3e The helmet light is shown partially from different viewing directions;

[0025] Figure 4a and Figure 4b The lens unit of the helmet light is shown from the rear and from the front;

[0026] Figure 5a The controller board of the helmet light is shown;

[0027] Figure 5b and Figure 5c The carrier element of the helmet light is shown from above and from the rear;

[0028] Figure 6a and Figure 6b The controller board of the helmet light is shown from additional viewing directions;

[0029] Figures 7a to 7c The ventilation slider of the protective helmet is shown from different viewing directions;

[0030] Figures 8a to 8j The three-dimensional external view of the battery pack is shown from different viewing directions and in different operating states;

[0031] Figures 9a to 9c The three-dimensional representation of the connector plug is shown from different viewing directions;

[0032] Figure 9d and Figure 9e The internal arrangement of the connector plug is shown from different viewing directions;

[0033] Figure 10a and Figure 10b The three-dimensional external view of the charging plug is shown from different viewing directions;

[0034] Figure 10c and Figure 10d The internal arrangement of the charging plug is shown from different viewing directions;

[0035] Figure 11a and Figure 11b The three-dimensional representation of the charging connection of the battery pack is shown;

[0036] Figure 12a and Figure 12b The internal arrangement of the battery pack is shown from different viewing directions;

[0037] Figures 13a to 13h The three-dimensional representation of the battery holder is shown from different viewing directions;

[0038] Figures 14a to 14e Show a helmet shell with a helmet light from different viewing directions;

[0039] Figure 15 Show a three - dimensional view of a helmet shell with a helmet light fastened to the helmet shell as seen from below;

[0040] Figures 16a to 16c Show a detailed view of a helmet shell with a helmet light fastened to the helmet shell as seen from below;

[0041] Figure 17a and Figure 17b Show a detailed view of a helmet shell with a helmet light fastened to the helmet shell from different viewing directions;

[0042] Figure 18 Show a detailed view of a helmet shell with a battery holder and an inserted battery pack fastened to the helmet shell;

[0043] Figures 19 to 21 Show a front view of a protective helmet with a helmet light fastened to the protective helmet as seen from the front;

[0044] Figure 22 Show a detailed view of a protective helmet with a helmet light fastened to the protective helmet as seen from an oblique upper direction;

[0045] Figure 23a Show a lateral cross - sectional view taken through a protective helmet with a helmet light fastened to the protective helmet;

[0046] Figure 23b Show another lateral cross - sectional view taken through a protective helmet with a helmet light fastened to the protective helmet;

[0047] Figure 24 Show a lateral exploded view of a protective helmet with different accessories; and

[0048] Figures 25a to 25i Show a part of a graphical user interface for operating a helmet light.

[0049] In the following description of the drawings, the same reference numerals denote the same or equivalent components. Detailed Description of the Invention

[0050] Figure 1 and Figures 2a to 2fShows three-dimensional views of the helmet light seen from different directions. In each case, the helmet light 10 shown includes a lens unit 14 on which an anti-glare shield 124 is arranged, and a body, and at least some parts of the cooler element 20 and the covering element 22 of the body can be seen in the figure in each case. The cooler element 20 and the covering element 22 can be arranged, for example, on opposite sides of the body of the helmet light 10, as can be seen in Figure 1 and can be fastened to each other, for example, by screws 23 that pass through the body respectively. Additional gluing of the cooler element 20 and / or the covering element 22 or only gluing instead of screw fastening is also possible. Further alternative fastening possibilities can also be envisaged, for example, using destructively removable fastening elements for the cooler element 20 and / or the covering element 22, by means of which, for example, the simple reparability of the helmet light 10 is maintained, but the manipulation of the electronics of the helmet light 10 on the basis of the damaged fastening element can be reproduced. The covering element 22 can consist of one or more parts that are connected to each other in a fixed or loose manner. In the example shown, the covering element 22 consists of a single part.

[0051] In Figure 1 the three-dimensional view shown, the cooler element 20 is located on the side of the helmet light 10 facing away from the observer and is mostly covered by the covering element 22. Therefore, in order to illustrate the connection between the cooler element 20 and the covering element 22 and to further enable the observer to understand the shape of the body of the helmet light 10, the hidden area of the cooler element 20 is shown in Figure 1 as a dashed line. The helmet light 10 has plug connectors 3000 and connection plug connectors 3002 at opposite lateral end regions. The plug connector 3000 can be, for example, a USB connector, especially a USB-C type connector. Instead of the arrangement of the two aforementioned plug connectors shown in the figure, a common arrangement on one side of the helmet light 10 can also be envisaged. However, the arrangement on opposite sides of the helmet light 10 has certain advantages in terms of cable routing because the available space for mounting the helmet light 10 is restricted, as will be explained below. In Figure 1 in addition to the plug connector 3000, a connection connector 3002a is also shown, which can be provided additionally or alternatively as required, especially in addition to or instead of the connection plug connector 3002. Figure 1The connecting connector 3002a in, for example, is located on the same side of the helmet light 10 that also has the plug connector 3000. The connecting connector 3002a is directly connected to the body of the helmet light 10 and is, for example, firmly soldered to the controller board 18 associated with the body of the helmet light 10. The connecting plug connector 3002 and / or the connecting connector 3002a can be used, for example, to connect accessory components to the helmet light 10. The accessory components for the helmet light 10 can be, for example, additional lighting elements that can be freely positioned or fixed to the helmet housing 36, such as lighting elements forming a "helicopter LED", which will be described in detail below. It is also conceivable that additional lighting elements can be attached to the edge of the helmet housing to achieve facial lighting. Such facial lighting can be particularly advantageous in the case of rescuing / saving a person, because the protective helmet usually leaves the face of the user / wearer in the shadow, so that the rescued person who is already in a panic may be panicked if they cannot recognize the user of the protective helmet approaching them or cannot recognize them as a normal person, and may inadvertently hinder the rescue / saving.

[0052] The plug connector 3000 and the connecting plug connector 3002 can each (like the connecting connector 3002a) be mounted on a printed circuit board that carries additional electrical components of the helmet light 10, which will be described in detail below by way of an example in the form of the controller board 18.

[0053] In the figure, the lens unit 14 is regularly surrounded by the anti-glare shield 124, which prevents or at least reduces the unwanted departure of scattered light from the lens unit 14. In this way, for example, since the light emitted from the lens unit 14 does not directly enter the user's eyes, the wearing of the helmet light 10 in the enabled state can be made more pleasant for the user. The anti-glare shield 124 can be made of, for example, rubber, plastic, GRP, metal sheet or a similar mechanically insensitive material that is impervious to visible light. The anti-glare shield 124 can be removably fixed to the lens unit 14, for example, by a clamping action. In this way, for example, replacement of the anti-glare shield 124 can be achieved in the case of damage. In this way, the adaptation of the anti-glare shield 124 used can also be achieved by an anti-glare shield 124 adapted to the corresponding intended use. It is conceivable that, for example, an anti-glare shield 124 with additional partially transparent elements is provided in a manner not shown in the irradiation direction of the lens unit 14 in order to modify the irradiation characteristics / light intensity of the helmet light 10. Alternatively, the anti-glare shield 124 can also be firmly and permanently connected to the helmet light 10, for example, by adhesive bonding or a destructively releasable latch.

[0054] As already indicated, the helmet light 10 can also include in Figure 1A face illumination unit not shown separately. With the aid of this face illumination unit, illumination of the face area can be achieved by specifically directed illumination elements, which can be arranged separately from the "helmet lamp body" containing the helmet lamp 10 in the face illumination unit. Thus, similar to the actual helmet lamp 10, the face illumination unit can be fixedly positioned on the inner edge of the protective helmet. The face illumination unit can also be directly integrated into the helmet lamp 10. For example, special illumination elements can be arranged on the rear side of the lens unit 14 such that they emit diffused light through the anti-glare shield 124 onto the user's face.

[0055] In Figure 1 it is also possible to recognize the connection cable 24 at the plug connection 3000, which terminates at the end of the connection cable 24 located in the connector plug 192, opposite the plug connection 3000, and this connector plug 192 will also be described in detail below.

[0056] The helmet lamp 10 can be switched between several different operating modes, where each of these operating modes is characterized by light being emitted by the helmet lamp, unless it is explicitly indicated that one of the operating modes will be the off state of the helmet lamp. For example, the several different operating modes can be characterized in that, without the helmet lamp 10 moving its position or orientation, different areas near the helmet lamp 10 are illuminated. Examples that can be mentioned in this regard are face illumination, short-range illumination, operating range illumination, remote illumination, helicopter lamp, and positioning lamp. These individual different illumination modes of the helmet lamp 10 can also be used / controlled in any desired combination with each other, which further increases the number of mutually different operating modes.

[0057] The helmet lamp 10 can also assume different operating states or can be operated in each of the several different operating modes. For example, the illuminance, i.e., the brightness of the emitted light, can be changed. In particular, this change can also be designed to be variable over time. In addition, the emission color of the corresponding controlled light-emitting elements of the helmet lamp 10 can also be variable and adaptable.

[0058] In Figure 2a the helmet lamp 10 is represented three-dimensionally from above, such that in addition to the lens unit 14 with the anti-glare shield 124, the connection plug connection 3002 on the left side, and the plug connection 3000 on the right side, details of the covering element 22 can also be recognized in particular. The covering element 22 has various elements that are used in particular to fix the helmet lamp 10 releasably to the helmet housing 36 described in detail below. For the installation of the helmet lamp 10, the covering element 22 includes at least four fastening points. Figure 2aThe rear retaining claws 116, the front retaining claws 112 and the retaining element 122 are shown on the left side respectively. In a symmetric manner thereto, the covering element 22 also includes the rear retaining claws 118, the front retaining claws 114 and the retaining element 122 on the side shown on the right side in Figure 2a . Thus, the covering element 22 in this example includes a total of six fastening points, and more or fewer fastening points may also be provided, as long as at least four fastening points are provided. The operating modes of the front retaining claws 112, 114, the retaining element 122 and the rear retaining claws 116, 118 will be described in detail below. The covering element 22 can be made of a material similar to that of the anti-glare shield 124, and preferably the covering element 22 is made of an electrically insulating material, although this is not absolutely necessary. In Figure 2a , a central on / off switch that is not described in more detail can be recognized. By means of this switch, for example, the on / off of the helmet lamp 10 can be switched. Since this on / off switch is difficult to access when the helmet lamp 10 is mounted on the helmet shell 36, this on / off switch can be considered optional, for example, in order to solve the basic function of the helmet lamp 10 when the helmet lamp 10 is held in the user's hand and not mounted on the helmet shell 36.

[0059] When the helmet lamp 10 is in the mounted state, especially in Figure 2b , the cooler element 20 that is easily recognizable faces away from the helmet shell 36 and points in the direction of the helmet interior. The cooler element 20 is provided with cooling ribs 21, which improve the dissipation of heat, and the cooling ribs 21 can dissipate the heat generated during the operation of the helmet lamp 10 to prevent the helmet lamp 10 from overheating. A switch 120 is provided at the center of the cooler element 20. Even in the mounted state of the helmet lamp 10, the switch 120 can be used in a simple manner to turn on / off the helmet lamp 10. By actuating the switch 120, in particular, the helmet lamp 10 can be switched from a fully off state to a standby mode, in which the helmet lamp 10 does not emit light but can be further controlled only by means of an external operating element. This can be considered a standby state, in which as little energy as possible is consumed, but at the same time the helmet lamp 10 can be flexibly controlled at any time. It is conceivable that when the switch 120 is actuated, for example, optical and / or acoustic signaling can occur, which signals to the user the ready availability of the helmet lamp 10 or turns off the helmet lamp 10.

[0060] As described above, the cooler element 20 and the covering element 22 form a large part of the outer surface of the main body of the helmet lamp 10. The covering element 22 and the cooler element 20 thus also exhibit mechanical strengthening and protection functions, and the cooling ribs 21 arranged on the cooler element 20 and the circumferential flange at the edge of the cooler element 20 contribute to further strengthening.

[0061] On the lens unit 14, in particular in Figure 2e there are indicated a number of individual circular lenses which are separated from one another and which are essentially for the directional light irradiation of the helmet lamp 10. The internal structure of the lens unit 14 with the lenses indicated here will be explained below in Figure 4a and Figure 4b .

[0062] The curved shape of the helmet lamp 10 can be recognized more clearly in Figure 2e and Figure 2f . Opposite regions of the body of the helmet lamp 10 on which the plug connector 3000 or the connecting plug connector 3002 is arranged are inclined with respect to the central region of the body of the helmet lamp 10 in order to adapt to the curvature predetermined thereby in its intended mounting position on the helmet shell 36.

[0063] Figure 3a A three-dimensional isometric view of the helmet lamp 10 is shown in exploded view. The helmet lamp 10 recognizable in Figure 3a is represented in a simplified form. The controller board 18 can be recognized between the covering element 22 and the cooler element 20. The controller board 18 can be formed, for example, as a printed circuit board, and in particular it bears the electronic components of the helmet lamp 10, which are connected to one another via conductor traces arranged on the controller board 18. In particular, these electronic components can include a control controller, not explicitly shown, which controls the different functions of the helmet lamp 10, such as switching between a number of different operating modes and operating states, and switching the helmet lamp 10 on and off. It can also be provided that a small independent battery cell is provided on the controller board 18, which enables the helmet lamp 10 to carry out short-term emergency operation without the external battery pack 100. This emergency operation can be limited, for example, to diagnostic operations and / or to allow a basic light output, for example for 10 minutes. In addition, the controller board can bear a sensor unit, which is also not shown in detail, or can have connection possibilities for such a sensor unit, such that the most different types of sensors included in the sensor unit can detect data, process them and send them to the control controller. The possible sensors of the sensor unit can include infrared, ultrasonic and twilight sensors. A backlight sensor and / or a gas sensor can also be provided as components of the sensor unit. In addition, the sensor unit can also include an acceleration sensor. Similarly, the sensor unit can include a body temperature sensor and / or a humidity sensor. The sensor unit can also include a head recognition sensor. The sensor unit can also include a housing temperature sensor for detecting the temperature of the helmet lamp 10. The sensors of the sensor unit can each be arranged to be integrated into the helmet lamp 10, or alternatively only partly be provided as an external module, which can be arranged, for example, on the battery pack 100 or the ventilation slider 50.

[0064] The control controller can be set to, for example, receive a detected value of the operating temperature of the housing and change the operating state of the helmet light based on the received value of the operating temperature of the housing. For example, when the detected value of the operating temperature of the housing of the helmet light 10 exceeds the allowable temperature threshold T tol_max , the control controller can be set to reduce the light output of the helmet light 10. The reduction of the light output automatically means a reduction in the waste heat generated, and thus in the long term a reduction in the value of the operating temperature of the housing. This can, for example, prevent the ignition of combustible materials (flammable gases or dust in the air) in an explosive environment. The control controller can also be set to turn off the helmet light 10 after outputting a warning signal when the detected value of the operating temperature of the housing of the helmet light exceeds the upper temperature threshold T max . Despite the measures taken previously, the above measures may be necessary if the temperature reduction cannot be achieved and a further temperature increase includes a direct risk that the housing of the helmet light 10 acts as an "ignition spark" and may cause, for example, an explosion of dust or gas. Similarly, if the detected value of the operating temperature of the housing of the helmet light is below the lower temperature threshold T Leuchte_min , the control controller can be set to slowly bring the turned-off helmet light 10 into a selected operating state during a time interval Δt that is greater than the turn-on interval actually required to turn on the light-emitting element. This measure limits the amount of waste heat locally generated at the lighting element at very low temperatures. This also reduces the resulting temperature gradient. In this way, less temperature-induced voltage is generated at the solder joints and / or the printed circuit board, which could impair the function of the helmet light 10. In addition, the control controller can be set to continuously increase the actual light output of the helmet light 10 to the desired light output in the selected operating mode during the time interval Δt. This is also used, for example, to reduce the temperature gradient within the helmet light 10.

[0065] If the sensor unit includes an infrared sensor, the sensor unit can be set to detect sensor data from the infrared sensor, process them and send them as processed sensor data to the control controller. Subsequently, the control controller can be set to receive the processed sensor data and switch the helmet light 10 between several operating modes and states based on the processed sensor data. The above switching can occur whenever a predefined arm movement of the 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 specific speed. In this way, simple control of the helmet light 10 can be carried out without the user having to pay special attention to it. If necessary, the user can even hold tools in their hands during operation.

[0066] An infrared sensor can be arranged on the controller board 18, for example, in the vicinity of the LED element 1610. Thus, the infrared sensor is then arranged in the region of the lens unit 14 and thereby detects sensor data in the region substantially in front of the lens unit 14. This allows for the limitation / fixing of the control panel such that unintentional actuation of the helmet light 10 can be avoided. The sensor unit can also include an ultrasonic sensor, which can be arranged on the controller board 18 in the vicinity of the LED element 1610 in a manner similar to the infrared sensor. The advantages described in the case of the infrared sensor can also be achieved with the ultrasonic sensor in a similar process. Thus, the ultrasonic sensor can also be arranged in the region of the lens unit 14 and can detect sensor data in the region substantially in front of the lens unit 14. This can likewise limit / fix the control panel such that unintentional actuation of the helmet light 10 can be avoided. The ultrasonic sensor is optionally also suitable for enabling a user wearing special heat-insulating protective clothing to operate. Thus, for example, a switch can occur if a predefined arm gesture of a user wearing the protective helmet 30 is recognized in the additionally processed sensor data of the ultrasonic sensor. Instead of or in addition to the infrared and / or ultrasonic sensors, the sensor unit can also include a twilight sensor. Then, the sensor unit can be set to detect the sensor data of the twilight sensor, process them, and send them as processed twilight data to the control controller. Subsequently, the control controller can be set to receive the processed twilight data and switch the helmet light 10 between the several operating modes and operating states based on the processed twilight data, in particular to turn it on when insufficient brightness in front of the helmet light 10 is recognized in the processed twilight data. This makes it possible to automate part of the operation of the helmet light 10, in particular to enable automatic turning on. By arranging the twilight sensor in the region of the lens unit 14, sensor data is detected substantially in the region in front of the lens unit 14, in particular in the operating range. This makes it possible to limit the automatic operation to the effect that the automatic actuation, in particular the turning on, of the helmet light 10 only occurs when insufficient brightness in the region in front of the helmet light 10 is recognized.

[0067] If the sensor unit includes a backlight sensor, the sensor unit can be set to detect sensor data from the backlight sensor, process them and send them as processed backlight sensor data to the control controller. Subsequently, the control controller can be set to receive the processed backlight sensor data and switch the helmet light 10 between the several operating modes and operating states based on the processed backlight sensor data. This also allows for a partial automation of the control of the helmet light 10. If the backlight sensor is directly irradiated by a light beam, i.e., the user is irradiated by another light source or another helmet light, it can be assumed that the helmet light 10 also directly irradiates the user of that other helmet light and may dazzle them. Therefore, it is advantageous to reduce the light output of the helmet light 10 for the user of the protective helmet 30 at least as long as the backlight sensor identifies a directly incident light beam, preferably even reducing the light output for a few more seconds. Advantageously, as already mentioned, the backlight sensor is part of the sensor unit and is arranged in the area of the lens unit 14 on the controller board 18 such that the backlight sensor data is detected substantially in the area in front of the lens unit 14. Based on the usual arrangement of the helmet light 10 above the user's eye area, it can then be assumed that the identification of strong backlight in this area is also related to the glare effect of the helmet light 10 on the carrier of the light source from which the backlight emanates. At least this glare effect is reduced because the helmet light 10 reduces its own light output when backlight is identified.

[0068] To reduce the glare effect emitted from the helmet light 10, the control controller can be set to switch the helmet light 10 from an operating mode in which the high beam is operative to the following operating mode or operating state, i.e., if it is recognized based on the processed backlight sensor data that the incident backlight exceeds or falls below a threshold brightness, the light range and / or intensity of the high beam is at least adapted to the operating mode or operating state. The glare effect emitted from the helmet light 10 can be reduced, in particular, by turning off, throttling the intensity or changing the irradiation direction to reduce the beam (e.g., the high beam) reaching far away, so that more light is irradiated in the ground direction. Then, the control controller can be set to perform the switching only when the incident backlight permanently exceeds or falls below the threshold brightness within a time interval Δt, where the time interval Δt is between 1 second and 5 seconds, preferably between 2 seconds and 3 seconds. In this way, it is possible to prevent a beam that only casually sweeps over the helmet light 10 and does not characterize any true continuous glare of the corresponding light from triggering the adaptation of the operating mode or operating state of the helmet light 10. A number of mutually different threshold brightnesses can also be predefined or adjusted in the control controller. Then, the control controller is set to adjust the illumination range and / or intensity of the high beam respectively when one of the number of mutually different threshold brightnesses is exceeded or not reached. In this way, sufficient illumination of the area in front of the user of the helmet light 10 can be combined with a glare effect that can be as negligible as possible for other oncoming users having their own light sources. Instead of oncoming users having their own light sources, if appropriate, the direction in which other users are located can also be determined by means of passive light sources (such as reflectors, etc.) and / or positioning beacons carried by other users. The term "user" should be interpreted very broadly here and also particularly includes animals, such as dogs, especially working dogs, which, for example, assist in searching for injured prey under poor visibility conditions, or more generally, assist in searching, and in such cases of searching for injured prey or searching, may be distracted by a dazzling light source.

[0069] If the sensor unit includes a gas sensor, the sensor unit can be set to detect sensor data from the at least one gas sensor, process them and send them as processed gas sensor data to a control controller. Subsequently, the control controller can be set to receive the processed gas sensor data and switch the helmet light 10 between the several operation modes and operation states based on the processed gas sensor data. Based on the fact that the helmet light 10 identifies hazardous vapors via the gas sensor, at least one warning can be given to the user, thus avoiding the problem of inadvertently being in an area contaminated with hazardous vapors. One or more gas sensors can be arranged in the area of the body of the helmet light 10. The body of the helmet light 10 has sufficient protected mounting space for this purpose, which can be used to arrange one or more gas sensors. It can also be at other positions, for example on the ventilation slider. The sensor unit can be set to detect the concentration of CO2 and / or CO, for example, by means of the gas sensor. These gases are colorless and odorless and are particularly likely to endanger the health of the user in areas contaminated with increasing concentrations of these gases. Then, the control controller can be set to switch the helmet light 10 to an operation state in which, if the processed gas sensor data shows a CO2 and / or CO concentration above the gas threshold concentration, a warning signal is output. The warning signal can be output acoustically and / or optically. For example, the acoustic output can be output via a speaker that can be connected to the helmet light 10. The speaker can be, for example, part of an input device that can be connected to the helmet light 10. The optical output can mean, for example, an adaptation of the light color emitted by the helmet light 10. For example, the helmet light 10 can output or use red light to illuminate the operation area to indicate danger. By informing the user with a warning signal, the user has the opportunity to take measures to protect themselves, such as leaving the dangerous area. The sensor unit can also be set to detect the concentration of combustible gas via one or more gas sensors. For example, the combustible gas can be ignited by the helmet light 10 itself or by a tool operated by the user. In this case, it can also be provided that the control controller is set to switch the helmet light 10 to an operation state in which, when the processed gas sensor data shows a concentration of combustible gas above the gas threshold concentration, at least one warning signal is output. This warning signal can also be output acoustically and / or optically. By informing the user with a warning signal, the user has the opportunity to take measures to protect themselves, such as leaving the dangerous area. Due to the risk of fire or explosion, it can also be provided, after the warning signal, to deactivate the helmet light 10 or at least throttle the light output. This can prevent an explosion or deflagration, because the heating of the helmet light 10 and the associated battery pack 100 may already be sufficient to cause ignition / explosion.

[0070] If the sensor unit includes an acceleration sensor, the sensor unit can be set to detect sensor data from the at least one acceleration sensor, process them and send them as processed acceleration sensor data to a control controller. Subsequently, the control controller can be set to receive the processed acceleration sensor data and switch the helmet light 10 between several operating modes and operating states based on the processed acceleration sensor data. In the data of the acceleration sensor, a change in the user's movement trajectory can be recognized, so that, for example, a fall of the user can be recognized by the control controller with the aid of the sensor unit. Thereupon, the control controller can take appropriate measures. In particular, the at least one acceleration sensor can be arranged in the region of the body of the helmet light 10. However, it can also be, for example, at other positions on the ventilation slider 50. The body of the helmet light 10 is protected under the helmet shell, so that conclusions can be drawn about the user's head movement based on the change in the movement trajectory. This is particularly advantageous for recognizing a fall in the acceleration data. The sensor unit or the acceleration sensor can detect accelerations in three mutually non-parallel directions. This provides the most flexible possible data acquisition, which allows the detection of a fall in any direction, for example.

[0071] The control controller can be set to switch the helmet light 10 to an operating state in which, when the processed acceleration sensor data is higher than an adjustable acceleration threshold, a position signal is output. If a fall of the user is detected thereby, characterized, for example, by a sudden acceleration in the z-direction (height), the position signal can facilitate the localization of the user. The output of the position signal can in particular include switching on the helmet light 10 (assuming that the helmet light 10 was previously switched off). The output of the position signal of the helmet light 10 can also include the activation of light elements for position indication (such as one or more helicopter LEDs 4000, 4002a, 4002b). The output of the position signal can also include a request to send a position signal to an input device connected to the helmet light 10. If the input device is a mobile phone or another input device equipped with wireless communication possibilities, the transmission can include, for example, sending an emergency call via a radio communication channel, where the emergency call can optionally also include the GPS coordinates of the input device if the input device has the GPS coordinates of the input device. The helicopter LEDs 4000, 4002a, 4002b can in particular be activated as part of a helicopter light, where the helicopter light further increases the visibility of the user, especially 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 has to be perceived by other people at a significantly different height, which is also the case, for example, for work on facades, earthmoving work in open pits, work in the tree canopy, etc.

[0072] It is also possible to determine whether the user is standing (no change in the z - direction), walking (slow change in the z - direction due to pendulum movement at each individual step), or running (rapid change in the z - direction) via an acceleration sensor or from data provided by an acceleration sensor. Based on this, the helmet light 10 can be controlled by a control controller such that the "light range" of the helmet light 10 is adjusted according to such changes in the z - direction, for example, a work light when standing, a short - range light when walking, and a long - range or long - range and short - range light when running. This can, for example, help prevent the user from tripping.

[0073] If the sensor unit includes an optionally non - contact body temperature sensor, the sensor unit can be set to detect sensor data from the at least one body temperature sensor, process them, and send them as processed body temperature sensor data to the control controller. Subsequently, the control controller can be set to receive the processed body temperature sensor data and switch the helmet light 10 between the several operating modes and operating states based on the processed body temperature sensor data. With the body temperature sensor or the data detected by it, overheating or hypothermia of the user can be particularly identified, which increases the safety of the user because the user cannot always detect these states in a timely manner by themselves. By switching the helmet light 10, the user can be notified of a potentially dangerous state for their health. In this case, the switching can particularly also include turning on the helmet light 10. The at least one body temperature sensor can be arranged in the area of the body of the helmet light 10. The body of the helmet light 10 provides a protected mounting space. In particular, when the user is wearing the protective helmet 30, the sensor unit can detect the body temperature of the user's head. From the body, the body temperature sensor can perform direct temperature monitoring / measurement of the user's head, which allows for a good assessment of the user's overall condition. Alternatively, the body temperature sensor can also be provided directly on the user's body in the form of a pulse band and connected to the helmet light 10, for example, via a short - range radio interface. Then, the control controller can be set to output a warning signal when the processed body temperature sensor data exceeds a predetermined body temperature threshold t max When this threshold is exceeded, it can be determined that the user is (about to) overheat. The warning signal can be output optically, for example, by a changed light output of the helmet light 10, or acoustically, for example, via a provided speaker. If it can be seen from the detected body temperature sensor data that the user has suffered heatstroke and needs help (there is obvious overheating or the detected body temperature further rises after the warning signal is output, where other sensor data can be additionally taken into account), it can also be stipulated that the helmet light 10 outputs an emergency signal as already described above in the case of a fall. The control controller can also be set to when the processed body temperature sensor data drops to a predetermined body temperature threshold t minOutput a warning signal when the following conditions are met. If the threshold is not reached, it can be determined that the user is (about to be) hypothermic. The warning signal can be output optically, for example, by a changed light output of the helmet light 10, or acoustically, for example, via a provided loudspeaker. If it can be seen from the detected body temperature sensor data that the user has severe hypothermia and needs help (there is significant hypothermia, or the detected body temperature further drops after the warning signal is output, where other sensor data can be additionally considered), it can also be stipulated that the helmet light 10 emits an emergency signal as already described above in the case of a fall.

[0074] If the sensor unit includes a humidity sensor, the sensor unit can be set to detect sensor data from the at least one humidity sensor, process them, and send them as processed humidity sensor data to the control controller. Subsequently, the control controller can be set to receive the processed humidity sensor data and switch the helmet light 10 between the several operating modes and operating states based on the processed humidity sensor data. The switching between the several operating modes and operating states can also clearly include turning on the helmet light 10 here. In addition, an increase in the proportion of yellow in the emitted light can be provided to better illuminate any possible foggy haze or thick fog. The at least one humidity sensor can be arranged in the area of the body of the helmet light 10. The body of the helmet light 10 provides a particularly protected installation space. It can also be, for example, other positions on the ventilation slider 50.

[0075] The helmet light 10 can include a fan unit, and in this case, if the processed humidity sensor data exceeds or is lower than a predetermined humidity threshold, the control controller can be set to turn on or off the fan unit. When the fan unit associated with the helmet light 10 is enabled, an air flow can be generated especially below the helmet shell 36 of the protective helmet 30 to better blow off any possible sweat film, which increases the wearing comfort of the protective helmet 30 and reduces the body temperature of the user. The fan unit can be arranged, for example, on the body of the helmet light 10 or on the lower edge of the helmet shell 36. The fan unit is not shown in the figure, but it is obvious to those skilled in the art that it must be designed such that it can generate an air flow below the helmet shell 36. Alternatively, the fan unit can also be arranged on or in the ventilation slider 50 and suck or blow the air flow through the ventilation opening 53 provided here. The fan unit can be supplied with electrical energy via the helmet light 10 or directly from the battery pack 100. The control controller can also be set to output a warning signal when the processed humidity sensor data exceeds a predetermined humidity warning threshold. At this "warning level", the user can be notified that the humidity in the ambient air may soon reach a problematic level.

[0076] If the sensor unit includes a head recognition sensor, the sensor unit can be set to detect sensor data from the at least one head recognition sensor, process them and send them as processed head recognition sensor data to the control controller, where the control controller is set to receive the processed head recognition sensor data and switch the helmet light 10 between the several operating modes and operating states based on the processed head recognition sensor data. In this way, partial automation of the control of the helmet light 10 can be achieved. Further, the several operating modes and operating states also explicitly include turning on and off the helmet light 10 and additional operating modes, in particular control based on the detected data from the head recognition sensor. It can be provided that the head recognition sensor is arranged in the body area of the helmet light 10. The body of the helmet light 10 represents a protected installation space. Further, the body is arranged under the helmet shell of the protective helmet 30, thus automatically being located near the user's head, making recognition relatively simple.

[0077] The head recognition sensor can include a position sensor which, as part of the head recognition sensor data, detects the spatial position of the helmet light 10, processes it and sends it to the control controller. By recognizing 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 or what they are doing. Thus, the user will keep the helmet light 10 basically "horizontally" upright for the vast majority of the time. Then, when it is obvious from the head recognition sensor data that the helmet light 10 is pointing to the ground, the control controller can be set to enable the work light of the helmet light 10. If the user starts with the "horizontal orientation" of the helmet light 10 and tilts their head forward when looking straight ahead in order to perform an activity directly in front of them, the helmet light 10 also tilts forward, making the enabling of the work light of the helmet light 10 useful and automatically executable by the control controller. In a similar way, if it is obvious from the head recognition sensor data that the helmet light 10 is pointing parallel to the ground or towards the sky, the control controller can also be set to enable the high beam of the helmet light 10. The head recognition sensor can also include a distance sensor which, as part of the head recognition sensor data, detects distance data, processes them and sends them to the control controller. The distance data can be detected especially inside the helmet shell. In this case, when the head recognition sensor data shows that the user is wearing the protective helmet 30, the control controller can be set to enable the work light or another light of the helmet light 10. This also contributes to useful automation of the control of the helmet light 10.

[0078] If the sensor unit includes a housing temperature sensor that detects the operating temperature value of the helmet light 10, the control controller can be set to receive the detected housing operating temperature value and change the operating state of the helmet light 10 based on the received housing operating temperature value. Thus, for example, the heat development of the helmet light 10 can be restricted in order to affect the detected housing operating temperature in a desired manner, in particular restricting its temperature rise. For example, when the detected housing operating temperature value of the helmet light 10 exceeds the allowable temperature threshold T tol_max , the control controller can be set to reduce the light output of the helmet light 10. Thus, less electrical energy is converted into light, so that less waste heat that increases the housing temperature is also generated. As another example, it should be noted that when the detected housing operating temperature value of the helmet light 10 exceeds the upper limit temperature threshold T max , the control controller can be set to turn off the helmet light 10 after outputting a warning signal. This process can directly contribute to preventing an explosion by presetting the temperature threshold to be lower than the "ignition temperature" (e.g., 40 °C). Depending on the expected gases and dust particles in the ambient air, the temperature threshold can be set differently in order to reliably comply with the legal requirements for explosion protection. As already described above, the warning signal can also be output optically or acoustically, for example. The control controller can also be set to when the detected housing operating temperature of the helmet light 10 drops below the lower limit temperature threshold T Leuchte_min , cause the turned-off helmet light 10 to enter a selected operating mode during a time interval Δt. Due to the slow heating, thermal stress in the helmet light 10, especially on the controller board and the solder joints located thereon, is avoided. In addition, the control controller can be set to continuously increase the actual light output of the helmet light 10 to the desired light output in the selected operating mode during the time interval Δt. Since cracks are more likely to occur at very low temperatures than at higher temperatures, it is advantageous to generate a smaller amount of waste heat at the start of the corresponding operating cycle when the helmet light 10 is still relatively cold. Similarly, the helmet light 10 can also include a battery pack 100 having a temperature sensor that detects the battery pack operating temperature of the battery pack 100, wherein the helmet light 10 includes a control controller that is set to receive the detected temperature value and change the operating state of the helmet light 10 based on the received battery pack operating temperature value. In this way, the control controller can take appropriate measures so that the battery pack 100 remains within the allowable temperature range, as described above. As long as the detected battery pack operating temperature value of the battery pack 100 drops below the lower limit temperature threshold T Akku_min , the control controller can also be further set to enable an electric heating unit arranged in the battery body 194. In this way, the discharge cycle of the battery pack 100 can occur with other normal parameters. When the detected battery pack operating temperature value of the battery pack 100 exceeds the allowable temperature threshold T Akku_maxWhen this is the case, the control controller can also be set to reduce the light output of the helmet light 10. By reducing the light output, i.e., reducing the brightness of the helmet light 10, the power drawn from the battery pack 100 is reduced, which directly results in a reduction in the waste heat generated, such that the temperature of the battery pack 100 can drop, assuming a constant emissivity of the waste heat to the environment. This can be advantageous, for example, in an environment where there is a risk of explosion.

[0079] The above actions of the different sensors, the sensor units including these sensors, and the control controller can also be considered as methods performed by these different elements of the helmet light 10. In addition, the behavior of the helmet light 10 can be adapted to different application purposes, for example, by "reprogramming" each individual or all of the thresholds, changing / adapting the recognized gestures / arm movements and the functions triggered thereby, etc.

[0080] The controller board 18 is mainly arranged in the region of the body of the helmet light 10, but in Figure 3a it projects beyond the body in the forward-facing edge region of the body. The controller board 18 is supported on its entire surface, in particular completely supported, by the carrier element 16 in order to ensure sufficient mechanical stability of the controller board 18. As can be recognized in Figure 3a it is possible that the edge regions of the controller board 18 and the carrier element 16 can be formed at an angle relative to their central regions, wherein the laterally positioned angled regions of the controller board 18 can carry, for example, plug connectors 3000 and connecting plug connectors 3002 known from Figures 2a to 2f For the sake of simplicity, these plug connectors and connecting plug connectors are not shown in Figure 3a and Figure 3b In Figure 3a the controller board 18 and the carrier element 16 continue forward in the direction of the lens unit 14 and thus connect the latter to the body of the helmet light 10. The controller board 18 can carry, for example, an LED element 1610 that generates visible light and is connected via electrical connection lines on the controller board 18 to a corresponding energy source. The lens unit 14 includes a number of lens elements not provided with individual reference numerals. Each of these lens elements can be assigned to one or more light-emitting LED elements 1610 on the controller board 18. The lens elements converge and focus the light emitted from the LED elements 1610 in the desired irradiation direction. In front of the lens unit 14, a cover 12 can also be recognized, which can be designed, for example, to be replaceable. The cover 12 basically serves to protect the lens unit 14, the individual lens elements of which are sensitive to mechanical damage, in particular scratches.

[0081] It can be stipulated that the helmet lamp 10 (e.g., on the controller board 18 or on the outside of the helmet lamp 10) has a housing temperature sensor that is not explicitly shown. This housing temperature sensor can particularly detect the operating temperature value of the housing of the helmet lamp 10.

[0082] Figure 3b A three-dimensional representation of a part of the helmet lamp 10 as seen from obliquely below is shown. In Figure 3b in particular, the cooler element 20 can be recognized, which cooler element 20 has its heat-dissipating cooling ribs 21 and additional reinforcing circumferential flanges. In addition, the centrally arranged switch 120 is also visible. In Figure 3b the front region of, a recess 25 is also provided on the cooler element 20, which recess 25 is located in the region where the connector plug 3000 is to be arranged on the controller board 18, so as to protect it from excessive mechanical loads. On the opposite side, the corresponding recess on the cooler element 20 is not visible, but this corresponding recess can also be provided for arranging the connection plug connector 3002 there.

[0083] The cooler element 20 is connected to the carrier element 16 it covers in a planar manner, such that the heat generated during the operation of the helmet lamp 10 reaches the cooler element 20 from the controller board 18 through the carrier element 16 formed as a good heat conductor and is discharged from the cooler element 20 into the surrounding environment.

[0084] Figure 3c Another three-dimensional representation of a part of the helmet lamp 10 as seen from obliquely above is shown. In Figure 3c the selected representation, only the controller board 18, the underlying carrier element 16 and the cover 12 are visible. The cover 12 in turn covers the lens unit 14, which lens unit 14 is usually arranged below and in turn covers the LED elements 1610 on the controller board 18. In the central region of the controller board 18, through holes not specified in more detail can also be recognized, through which the cooler element 20 can be screwed together with the covering element 22 during the installation of the helmet lamp 10. Thus, the through holes also extend through the carrier element 16.

[0085] Figure 3d Additional components of the helmet lamp 10 are shown three-dimensionally from obliquely above. Compared with Figure 3c in, Figure 3d the covering element 22 arranged on the controller board 18 is additionally shown. In the installed state of the helmet lamp 10, the upper side of the covering element 22 (visible in Figure 3d faces the helmet shell 36 with the not-detailed specified on / off switch.

[0086] Figure 3e The components of the helmet lamp 10 are shown three-dimensionally from obliquely below. In Figure 3eThe selected perspective covers the covering element 22 which is located on the underside of the helmet lamp 10 facing away from the observer, and the covering element 22 is thus only partially visible. In addition, the representation of the cooler element 20 is omitted, so that the underlying carrier element 16 is now visible. The controller board 18 is mostly covered by the carrier element 16, so that only a few edges of the controller board 18 are visible. The plug connectors 3000 and the connecting plug connectors 3002 are further shown at the laterally angled region of the controller board 18. The through-holes in the controller board 18 and their continuations in the carrier element 16 can be recognized. In addition, according to this perspective, additional through-holes can now be recognized in the angled front region, and these additional through-holes are also for mounting purposes. In addition, the switch 120 is also centrally visible on the carrier element 16 and can now be recognized as directly resting on the carrier element 16, and if the cooler element 20 is installed, the switch 120 is framed by it in a "semicircular" manner. The switch 120 can in particular be formed in the form of a foil switch, wherein in particular the foil-shaped connecting lines are guided around the edge of the carrier element 16 and connect the switch to the corresponding connectors on the controller board 18.

[0087] Figure 4a The lens unit 14 of the helmet lamp 10 is shown from the rear, and Figure 4bThe lens unit 14 of the helmet light 10 is shown from the front. The lens unit 14 has a plurality of pointing units 1402 arranged adjacent to each other. Seven individual pointing units 1402 arranged adjacent to each other are shown. Each pointing unit 1402 is for guiding light within the lens unit 14. The pointing unit 1402 is of a truncated conical design, wherein each pointing unit 1402 is assigned to an individual LED element 1610, and the light emitted by the LED element 1610 passes through the lens unit 14 from the rear to the front, with as little scattered light as possible being scattered to the sides. This can be achieved in particular or at least supported by the truncated conical design of the pointing unit 1402, wherein the light emitted by the respective LED element 1610 is refracted back into the truncated conical shape by the natural beam refraction at the boundary region between the pointing unit and the intermediate free space. It is conceivable and an additional reflective coating of the truncated conical surface can be provided if desired. The light emerging at the front side of the lens unit 14 at each pointing unit 1402 first enters into the regions of different Fresnel lenses 1400a, 1400b and 1400c there, wherein each of the pointing units 1402 in the pointing unit forms a pair with one of the Fresnel lenses 1400a, 1400b and 1400c and leads to that one Fresnel lens. The different Fresnel lenses 1400a, 1400b and 1400c have different designs, wherein the three centrally arranged Fresnel lenses 1400c each have a main irradiation direction different from that of the paired Fresnel lenses 1400b and 1400a arranged further outwards. Of course, the lens unit 14 can be formed with more or fewer pairs of pointing units 1402 and Fresnel lenses 1400a, 1400b and 1400c. In addition, the provided main beam directions of the respective Fresnel lenses 1400a, 1400b and 1400c can also be formed as required. For example, the different main beam directions of the Fresnel lenses 1400a, 1400b and 1400c can be designed such that the Fresnel lens 1400a is an outer working light lens, the Fresnel lens 1400b is an inner working light lens, and the Fresnel lens 1400c is a front light or a high beam lens. The lens element 14 can be formed as an injection molded part made of, for example, a transparent plastic having suitable light refraction characteristics. Each of the Fresnel lenses 1400a, 1400b, 1400c can in particular also have the function of a diffuser.

[0088] The different Fresnel lenses 1400a, 1400b, 1400c are used in various operating modes of the helmet light 10 in different combinations for irradiating light in order to illuminate the light cone desired for the respective operating mode to illuminate different spatial regions around the helmet light 10, in particular the operating range, short range and long range.

[0089] For example, the spatial region directly in front of the user can be regarded as the user's operating range. The core region of the illuminated operating range (i.e., one or more light cones that emit from the Fresnel lenses 1400a, 1400b, 1400c and directly illuminate the region) can, for example, start at about 1 m in front of the user and end at about 4 m in front of the user at an assumed height of 1.8 m of the protective helmet 30 worn by the user and with the protective helmet in an orientation "parallel" to the ground. Starting from the helmet lamp 10, the lateral opening angle of the core region of the illuminated operating range can be about 160°, such that to the right and to the left, a wide region is directly within the one or more light cones. Thereby, the main beam direction and shape of the one or more light cones originating from the "functioning" Fresnel lenses, which directly illuminate the core region of the operating range, can be determined in a simple manner. Furthermore, the operating range can be defined such that the exact limits of the one or more light cones can still be modified according to the application. The shape and limits of the one or more light cones are determined by the Fresnel lenses 1400a, 1400b, 1400c used, each of which has a main beam direction and an optional "asymmetric" irradiation angle. On the one hand, by illuminating the operating range, the narrow and limited region in front of the user of the helmet lamp 10 is broadly illuminated, which simplifies their work. At the same time, a possible glare effect on other persons working near the user is prevented.

[0090] The short range adjacent to the operating range at this distance can, for example, still partially overlap with the operating range, and in particular, when the user wearing the protective helmet 30 is walking, the short range is illuminated. The core region of the illuminated short range, i.e., the one or more light cones of the directly illuminated region emitted from the helmet lamp 10, can, for example, start at about 2 m in front of the user and end at about 6 m in front of the user at an assumed height of 1.8 m of the protective helmet 30 worn by the user and with the protective helmet in an orientation "parallel" to the ground. Starting from the helmet lamp 10, the lateral opening angle of the core region of the illuminated short range can be about 120°, such that to the right and to the left, a region slightly narrower than the operating range is directly within the one or more light cones. Thereby, the main beam direction and shape of the one or more light cones that directly illuminate the core region of the short range can also be determined in a simple manner. In this way, the operating range is closer and is as well-defined as the short range. The shape of the one or more light cones is also determined by the Fresnel lenses 1400a, 1400b, 1400c used, each of which has a main beam direction and an optional "asymmetric" irradiation angle. By illuminating the short range, the limited region in front of the user of the helmet lamp 10 is well illuminated, which allows reliable and timely identification of obstacles during walking. At the same time, the possible glare effect remains small for other persons working near the user.

[0091] The spatial region in front of the user, which extends far beyond short range, can be defined as the user's far range. For example, the far range can still partially overlap with the operating range, and in particular, when the user wearing the protective helmet 30 runs or "looks into the distance", i.e., when their head is raised to look "into the distance", the far range is illuminated. This can be detected, for example, by means of a position sensor. The core region of the illuminated far range, i.e., the one or more light cones of the direct illumination area emitted from the helmet light 10, can, for example, start at about 5 m in front of the user at an assumed height of 1.8 m of the protective helmet 30 worn by the user and with the protective helmet "parallel" to the ground and end at approximately infinity and even point upwards into the sky, such that the illuminated core region does not formally end in front of the user but extends to infinity. However, in order to reduce possible glare effects, it can be stipulated that the light cones emitted from the helmet light 10 illuminate the ground at a certain distance (e.g., at a distance of 100 m). Starting from the helmet light, the lateral opening angle of the core region of the illuminated far range can be about 60° or less, such that only a small area is directly within the one or more light cones to the right and left. Thereby, the main beam direction and shape of the one or more light cones, which directly illuminate the core region of the far range, can be determined in a simple manner as well. Furthermore, the far range can be defined in this way sufficiently. The shape of the one or more light cones is again determined by the Fresnel lenses used, each Fresnel lens having a main beam direction and an optional "asymmetric" irradiation angle. By illuminating the far range, the area far in front of the user where the helmet light 10 is located is illuminated, which allows reliable and timely identification of distant objects.

[0092] The lens unit 14 can also have, at the lower edge of its rear side, an area that allows light to diffusely exit in the direction of the user's face when the assigned LED element 1610 emits light. In particular, this diffused light can form an essential part of the face illumination.

[0093] Accordingly, the lens unit 14 includes a plurality of Fresnel lenses 1400a, 1400b, 1400c arranged substantially adjacent to each other. 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 also be divided into a first subset of Fresnel lenses 1400a, 1400b, 1400c and a second subset of Fresnel lenses 1400a, 1400b, 1400c. For example, the first subset of Fresnel lenses 1400a, 1400b, 1400c can then emit light when illuminating the operating range of the user of the protective helmet 30 when the user wears the protective helmet 30. The second subset of Fresnel lenses 1400a, 1400b, 1400c can then emit light when providing long-range illumination of the user of the protective helmet 30 when the user wears the protective helmet 30. In this way, the helmet light 10 can illuminate different areas without having to move the helmet light 10 itself or the protective helmet 30 to which the helmet light 10 is fastened. Each of the plurality of Fresnel lenses 1400a, 1400b, 1400c can also include the function of a diffuser to counteract possible glare effects. In particular, this can be applied to the component of the helmet light 10 for illuminating the facial area of the user. Light can be emitted via a part of the first subset of Fresnel lenses 1400a, 1400b, 1400c while also being emitted via a part of the second subset of Fresnel lenses 1400a, 1400b, 1400c, for example, in order to achieve illumination of the short-range area of the user of the protective helmet when the user wears the protective helmet 30. In this way, a stepped, gradual transition of illumination between the operating range and the long range can be achieved in order to illuminate, for example, a short range that is located between and partially overlaps with the operating range and the long range. An anti-glare cover can be provided around the lens unit 14 to prevent light from the lens unit 14 from accidentally falling directly onto the user's face, especially directly 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 light frequency range. It is also conceivable that, as an alternative, the cover 12 is arranged removably in front of the lens unit 14 and is part of the lens unit 14 and is made of such a transparent material that attenuates yellow light the least in the visible light frequency range. If the yellow part of the light generated by the helmet light 10 is attenuated the least, the yellow part with a "more yellow" effect in the emitted light thus increases. In this way, in particular, fog can be better illuminated because the visible yellow light does not scatter as strongly as visible light of other colors. As already mentioned, each of the plurality of Fresnel lenses 1400a, 1400b, 1400c can have a different main beam direction from each other. In this way, the light generated by the helmet light 10 can be directed in different directions in order to illuminate different areas around the user of the helmet light 10.Each of the plurality of Fresnel lenses 1400a, 1400b, 1400c can converge the emitted light to different degrees. Optionally, each lens can also be used as a scattering lens, which fans out the light beam generated by the LED element 1610 to achieve less spotty illumination. This allows for "bright" illumination that can be varied according to requirements, and in particular, also allows for a fairly diffuse illumination of an area, for example to counteract the glare effect.

[0094] Figure 5a The controller board 18 of the helmet light 10 is shown. As already mentioned, the controller board 18 has conductor traces 1608 that are not shown for simplicity in Figure 5a Only a few electronic components in the central region of the controller board 18 are indicated. A mechanical switch element 1612 for operating the helmet light 10 can be provided, particularly shown in the center. The lateral region of the controller board 18 is shown angled with respect to the central region, and for this angle to be achieved, a milling part 1602 is provided on which the controller board 18 can be bent into a desired shape. A plurality of holes 1604 are also arranged and distributed on the controller board 18, and these holes 1604 can, for example, assist in fastening the cooler element 20 and the covering element 22 during assembly. In the angled front region, the light-emitting LED elements 1610 are further indicated. The number and characteristics of the LED elements 1610 can vary. For example, the lens unit 14 can be formed with "more" Fresnel lenses 1400a, 1400b, 1400c, and the number of LED elements 1610 can be increased correspondingly. The LED elements 1610 or at least some of them can also be colored LED elements 1610 whose emission color can be adjusted. In addition to the represented LED elements 1610 of each of the Fresnel lenses 1400a, 1400b, 1400c belonging to the lens unit 14, the controller board 18 can also include additional LED elements not shown, which emit light in the direction of the lower edge of the controller board 18 or the lens unit 14, and this light exits there as diffuse light and can form an essential part of the face illumination.

[0095] Figure 5b The carrier element 16 of the helmet light 10 is shown three-dimensionally from one side, while Figure 5cThe same carrier element 16 is shown three-dimensionally from the opposite side. It can be recognized that the carrier element 16 is provided with a bending point 1804 and various holes 1806, which delimit the central region of the carrier element 16 from the angled lateral regions, and the various holes 1806 can, in particular, coincide with the holes 1604 on the controller board 18 in their respective positions. In the central region of the carrier element 16, a large recess can also be recognized, by means of which a switch in the form of a mechanical switch element can be arranged directly on the controller board 18 and at the same time be accessible via the carrier element 16. However, this recess is optional, and a switch that may be desired on this side of the controller board 18 or the helmet lamp 10 can alternatively be formed as a foil switch without a recess. In this case, the connecting lines are then routed around the carrier element 16 to the controller board 18. The carrier element 16 can be milled or stamped, for example, from an aluminum sheet and bent into the desired shape. The carrier element 16 can be glued, for example, to the controller board 18 such that the controller board 18 and the carrier element 16 form a unit, and the heat emitted from the controller board 18 can be easily dissipated via the carrier element 16.

[0096] Figure 6a The controller board 18 of the helmet lamp 10 is shown from one side, while Figure 6b the same controller board 18 of the helmet lamp 10 is shown from the other side opposite to this side. In Figure 6a and Figure 6b the controller board 18 shown, the plug connectors 3000 and the connecting plug connectors 3002 are additionally shown on the opposite laterally angled regions. Furthermore, as an example, Figure 6a the mechanical switch element 1612 on the controller board 18 is shown, and the LED element 1610 arranged on the angled region facing away from the observer is also still recognizable, and the same applies to the edge of the frame 1616, which is described in more detail in Figure 6b the case of Figure 6b In Figure 6bThe side of the controller board 18 visible in [description] can also be designed such that in an embodiment not shown, there is no additional mechanical switch element 1614, so that the associated / matching carrier element 16 can then optionally be designed without a central recess. In this case, for example, a foil switch can be provided, the connection of which can be guided 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 additional mechanical switch element 1614 there. In a similar manner, Figure 6a the mechanical switch element 1612 shown in [description] can also be replaced, for example, by a foil switch or another switch element.

[0097] Figure 7a , Figure 7b and Figure 7c each show the ventilation slider 50 of the protective helmet 30 from different viewing directions. Figure 7a shows the ventilation slider 50 viewed from above. Figure 7b shows the ventilation slider 50 viewed from the side, Figure 7c shows the ventilation slider 50 viewed obliquely from behind. The ventilation slider 50 is generally fixed to the helmet shell 36 of the protective helmet 30 in a displaceable manner, for example, clamped by means of a stop device, where the stop lug of the stop device (which can be arranged, for example, on the ventilation slider 50) then moves / displaces together with the ventilation slider 50 within a channel in the helmet shell 36 of the protective helmet 30 relative to the protective helmet 30 such that the ventilation opening 53 (which can be identified in Figures 7a to 7c [description]) coincides with the associated opening on the helmet shell 36 of the protective helmet 30 or is offset relative to the opening. In the offset position, the ventilation opening 53 is closed (by the material of the helmet shell 36), while in the other position, i.e., the corresponding position, the ventilation opening 53 is open, so that air exchange can occur between the interior of the helmet shell 36 and the external space above the helmet shell 36. Figures 7a to 7cThe ventilation slider 50 shown in FIG. 1 includes, in addition to the ventilation openings 53, several centrally arranged helicopter LEDs 4000, 4002a, and 4002b. 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 the protective helmet 30, the helicopter LEDs 4002a and 4002b point substantially upward when the user is standing, making it easy to locate the user from above in the dark. The helicopter LED 4000 is located behind an edge 4004 that is oriented at an angle relative to the other helicopter LEDs 4002a and 4002b, such that the beam direction of the helicopter LED 4000 is also tilted relative to the other helicopter LEDs 4002a and 4002b. This allows the helicopter LED 4000 to be located from above even when the user is bending forward or lying down (e.g., after a fall) if the ventilation slider 50 is worn by the user as part of the protective helmet 30. In the case of an upright user, the helicopter LED 4000 can be considered or used as a "positioning light" radiating to the rear. If desired, additional LEDs can be provided on the ventilation slider 50, for example, to ensure lateral orientation of a user wearing a protective helmet 30 equipped with such a ventilation slider 50. Providing additional LEDs on the sides of the ventilation slider 50 in different, easily distinguishable colors can also provide at least an approximate indication of the user's orientation or viewing direction. For example, when the protective helmet 30 is worn, a first LED arranged on the left side can illuminate in a first color, while when the protective helmet is worn, a second LED arranged on the right side can illuminate in a second color different from the first. This makes it apparent to a distant observer, even in darkness, whether they are facing the left or right side of the head of the wearer of the protective helmet 30, and allows them to draw conclusions about the wearer's approximate viewing direction.

[0098] The helicopter LEDs 4000, 4002a and 4002b arranged in the ventilation slider 50 can be electrically connected to the helmet light 10, in particular via electrical connection lines, which are for example connected in Figure 1 The known connecting plug connector 3002 is connected to the helmet light 10 or to the connecting connector 3002a.

[0099] Furthermore, at least one battery cell can be arranged on the invisible inner side of the ventilation slider 50. In this way, the battery cell can be arranged in a protected and fixed position, such that, in particular, unintentional peeling off or snagging on obstacles can be reliably excluded. The ventilation slider 50 can also include a curved ventilation slider bottom, which is invisible from the indicated viewing direction and which substantially forms the inner side of the ventilation slider and abuts against the inner side of the outer side of the ventilation slider with its edge, thereby forming a space volume in the ventilation slider 50, in which the at least one battery cell is arranged. In this way, encapsulation of the battery on the inner side of the ventilation slider 50 can be achieved, thus better protecting the battery.

[0100] The ventilation slider 50 can also include an electrical connection member for connecting the at least one battery cell to an electrical consumption device and / or a charging power source. Thus, similar to the connection members of the battery pack 100 described in more detail below, the electrical connection member allows for a standardized connection between the battery cell in the ventilation slider 50 and the helmet lamp 10 or another electrical consumption device. The electrical connection member can be arranged on the lower edge of the outer side of the ventilation slider, thereby enabling the possibility of easy access or an easy electrical connection.

[0101] The electrical connection member can be oriented and arranged such that it can be displaced together with the at least one stop lug in the groove on the helmet housing 36. In this way, the connection cable 24 can be completely guided under the helmet housing 36, such that there is no outward-facing cable loop that could endanger the safety of the user. Alternatively, the electrical connection member can be oriented and arranged such that it can be displaced parallel to the at least one stop lug in another groove on the helmet housing 36. In this way, the connection cable 24 can also be completely guided under the helmet housing 36, such that there is no outward-facing cable loop that could endanger the safety of the user.

[0102] Magnets and electrical contacts can also be provided in the case of the electrical connection member, where the advantages are similar to the corresponding features in the case of the connector plug 192 described later. In particular, since the magnet pulls the components of the plug connection into the correct position, the magnet can facilitate the blind connection of the connector plug to the battery cell. Additionally, another electrical connection member separate from the electrical connection member can be provided, which interacts with the electrical connection member. The additional electrical connection member can be arranged on the lower edge of the outer side of the ventilation slider, such that it is easily accessible and enables a simple connection of the charging device to the battery cell.

[0103] It is also conceivable that the additional electrical connection member includes magnets and electrical contacts. Since the magnet pulls the components of the plug connection into the correct position, the magnet can also facilitate the blind connection of the plug for charging the battery pack at this point.

[0104] Figures 8a to 8iEach shows a three-dimensional external view of the battery pack 100. These representations are partially simplified so as not to be dominated by irrelevant details. Figure 8a The battery pack 100 in a deactivated state is shown. Figure 8a The battery pack 100 shown in includes a substantially elongated cuboid battery body 194 with beveled edges as Figure 8a shown. As an alternative, rounding of the edges can also be envisaged. On one side of the battery body 194, Figure 8a the display and operation element 102 in an inactive state is shown. In the lower side region of the battery pack 100, the connector plug 192 can be identified, which is known from Figure 1 The battery pack 100 can be connected to the helmet light 10 by means of the connector plug 192. In Figure 8a the battery pack 100 is shown in its deactivated state, such that the display and operation element 102 therefore shows nothing. However, it is conceivable that the display and operation element 102 can be used to switch on and off the individual display elements on the display and operation element 102 and can therefore also be "marked" in order to identify the operation element even without current.

[0105] Figure 8b From the side opposite the display and operation element 102 of Figure 8a the battery pack 100 is shown, such that the rear side of the battery pack 100 is visible. The rear side of the battery pack 100 can be constructed in different ways as required.

[0106] Figure 8c The battery pack 100 in an enabled state is shown. Figure 8aThe display and operation element 102, which is not separately specified, shows various information of the user, especially when the battery pack 100 itself is enabled. The display and operation element 102 can graphically represent, for example, 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 operation element 102 can have a display area 2008, below which an on / off switch element can be arranged, especially as a foil switch, such that touching the represented on / off switch 2004 can, for example, turn the battery pack 100 or the connected helmet light 10 on and off. In particular, the temperature display 2000 can graphically represent the temperature of the battery pack 100. This is important because the capacity and output performance of the battery pack 100 vary with temperature. Of course, optionally, the display area 2008 can also graphically represent other or additional information about the helmet light 10 or the battery pack 100. For example, in the display area 2008, if the battery pack 100 is connected to the helmet light 10 via a connector plug 192, an error message of the helmet light 10 can be graphically represented. Below the connector plug 192, the charging plug 190 can also be Figure 8c identified in Figure 8c As shown, the charging plug 190 can be connected to the battery pack 100 with the connector plug 192 inserted. Alternatively, the battery pack 100 can also be directly connected to the charging plug 190 without an inserted connector plug 192. For example, if needed, in Figure 8c the LED backlight 2006 indicated by the hatching around the on / off button 2004 can also provide a "backlight function" for the user because the alignment of the battery pack 100 on the protective helmet 30 in the installed state allows for the corresponding function. Alternatively or additionally, one or more (especially red) LEDs can be separately provided on the housing of the battery body 194.

[0107] Relative to the represented viewing angle, Figure 8d the external view of the battery pack 100 shown in Figure 8c corresponds to Figure 8c However, compared with Figure 8d the battery pack in Figure 8c is shown in a different operating state. In the case of the battery pack 100 represented in Figure 8dIn the case of the battery pack 100 shown, the LED backlight 2006 is deactivated, which is indicated by the absence of hatching. In the same way, in the area of the battery charge level display 2002, recognizable hatching can visualize the current charge level of the battery pack 100. The temperature display 2000 can visualize the temperature of the battery pack 100, for example, by means of a color change or in another suitable way. Alternatively, it is also conceivable that near or instead of the recognizable symbol in Figure 8d the temperature display 2000 directly represents the temperature of the battery pack 100 in the figure. For example, in Figure 8d the on / off button 2004 shown in Figure 8c and Figure 8d can provide different functions. For example, the on / off button 2004 can turn on or off the helmet light 10 connected to the battery pack 100. As long as no helmet light 10 is connected to the battery pack 100, the on / off button 2004 can, for example, place the battery pack 100 itself in different operating states. For example, an on / off button 2004 can be provided to query at least some of the information that can be displayed in the display area 2008, which helps and in particular enables or disables the battery charge level display 2002. The change in the function provided by the on / off button 2004 can be implemented according to the plugs (i.e., the charging plug 190 and the connector plug 192) respectively connected to the battery pack 100, where the internal logic circuit of the battery pack 100 recognizes which plug is connected to the battery pack 100 based on the measurable voltage at the connection contacts of the battery pack 100 described in more detail below. The special design of the charging plug 190 and the connector plug 192 allows the connector plug 192 and the charging plug 190 to be connected to the battery pack 100 simultaneously, so that, for example, several batteries can also be connected to the helmet light 10 of the helmet light system at the same time. In addition, the battery pack 100 can also be charged during the use of the helmet light 10.

[0108] In addition to the helmet light 10, the helmet light system may further include a transmission and reception module and an input device having an additional transmission and reception module, wherein the helmet light 10 can be switched among a number of operation modes and operation states. Then, the input device can be connected to the helmet light 10 in a form of two-way communication via the transmission and reception module and the additional transmission and reception module. Thus, when the helmet light 10 is connected to the input device, the helmet light 10 can be controlled via the input device, and the input device can also receive operation information from the helmet light 10 in the opposite direction. In this way, the input device can be positioned as an operation unit for the helmet light 10 as needed and can be particularly arranged within the user's field of vision, so that the operation of the helmet light system is simplified. The transmission and reception module and the additional transmission and reception module can be radio modules or cable binding modules. The two-way communication between the helmet light 10 and the input device can be established via a general communication protocol. The use of the general communication protocol also allows for more complex control of the helmet light system, which goes beyond the simple closing of a circuit for turning on and off. The control of the helmet light system can correspondingly be flexible.

[0109] The two-way communication used can be protected by encryption. In this way, unintentional external operations of any input device connected to the helmet light 10 of the helmet light system can be prevented. This is particularly advantageous when several helmet light systems are used and their respective input devices are close together. In this case, it can be stipulated that a password be entered to protect the connection. The operation information received by the input device can also include the status information of the helmet light system. Then, the input device can output the status information of the helmet light system. This also facilitates the operation of the helmet light system. The helmet light 10 of the helmet light system can also be connected to another input device when it is already connected to the input device. The helmet light 10 can then be mainly controlled by the other input device. In this way, for example, priority operations such as turning on a camera, helicopter light or positioning light can be performed by an operation guide or monitoring system installed at a certain location, if the helmet light system has such a possibility. Similarly, the shutdown of individual operation functions can be prevented by a higher-level instance.

[0110] The helmet light system, which already includes at least one helmet light 10 having a control controller and the at least one helmet light can be switched to a number of operation modes and operation states by the control controller, can be supplemented by a camera unit, and the camera unit is then operably connected to the control controller. Once the helmet light 10 of the helmet light system is enabled, the control controller can enable the connected camera unit. It can also be the case that the enabling has already occurred as long as the helmet light system is in standby mode and has not emitted any light. This allows for the automatic recording of what the user of the helmet light system does and sees. In particular, it can prevent the user from forgetting to comply with possible recording obligations.

[0111] The camera unit can internally store the recorded video. In this way, long-term archiving can be carried out. The camera unit can also send the recorded video to the helmet light 10, for example, for storage in a memory integrated into the helmet light 10. In this way, long-term archiving can also be carried out. Preferably, it is stipulated that the control controller transfers the video recorded by the camera unit as operation information to an external storage device that can be connected to the helmet light system. In this way, an almost infinite recording period can be achieved. The external storage device can also be called by a third party, especially for the optical representation of the video, in order to provide assistance to the user of the helmet light system, for example, in case of problems. For example, guiding the user to solve the problem. In particular, for this purpose, the helmet light system can include headphones through which the user can communicate with the third party providing the help. The communication can be carried out, for example, via a mobile radio connection, where the helmet light system is connected, for example, to an input device providing a mobile radio connection, such as a mobile phone. The control controller can be set to adjust the recording direction of the camera unit according to the operation mode and / or operation state of the helmet light 10. This can improve the quality of the recordings taken by the camera. In particular, the recording direction and brightness of the resulting recordings can be set.

[0112] The control controller can also be set to adjust the dynamic focal length of the camera unit according to the operation mode and / or operation state of the helmet light. In this way, the recording quality of the camera can also be improved. This can be done, for example, by adjusting the zoom, for example, to widen or reduce the viewing angle.

[0113] The features of the above-mentioned helmet light system can generally also be implemented and realized within the framework of a method for operating the helmet light system, which can then be executed by the control controller of the helmet light.

[0114] Figure 8e The battery pack 100 is shown as seen from the rear, where, in contrast to Figure 8b In contrast, in addition to the connector plug 192, the charging plug 190 is also connected to the battery pack 100. The functions of the plugs will be explained in more detail below.

[0115] Figure 8f and Figure 8g A three-dimensional detailed view of the battery pack 100 is shown. Figure 8f A section of the upper side of the battery pack 100 is shown, while Figure 8gShows a section of one side of the battery pack 100. A pair of stop lugs 212 can be identified on the upper side. There are lateral stop lugs 210 on the said side of the battery pack 100. Advantageously, if lateral stop lugs 210 are provided on one side, additional lateral stop lugs can be provided on the opposite other side. The stop lugs 212 and the lateral stop lugs 210 (and possibly additional lateral stop lugs) can in particular cooperate with a battery holder 214, which will be described below, and fix the battery pack 100 in the battery holder 214 to the protective helmet 30. The stop lugs 212 and the lateral stop lugs 210 are only shown in Figure 8f and Figure 8g but can also be provided in the battery pack 100 shown in other figures.

[0116] Figure 8h 、 Figure 8i and Figure 8j Show the battery pack 100 without the connecting plug from different perspectives. Figure 8h The battery pack 100 represented in is in the off operating state, so that the display area 2008 does not show any content. However, it is also conceivable that the display area 2008 also shows at least the on / off button 2004 in the no-current state, for example in the form of a transparent foil image. In the lower side area of the battery pack 100, the electrical contact surface 1112c is visible on the end face 1124 of the battery body 194. In addition, the notch-shaped recess 1114a is visible, which is used to center the connector plug 192 or the charging plug 190 and at the same time prevent the plug from breaking laterally from the battery pack 100 in the installed state. Figure 8j Shows the battery pack 100 as seen from the other side, so that the recess 1114a on the end face 1124 of the battery body 194 can be more clearly identified. Figure 8i The battery pack is represented in such a way that the other end face of the battery pack 100 opposite to the end face 1124 is visible, and the other end face can be designed to be, for example, completely smooth. However, if necessary, additional connection possibilities in the form of electrical contact surfaces, guiding elements or additional operating elements can also be arranged on this other end face.

[0117] Figure 9a 、 Figure 9b and Figure 9c Show three-dimensional representations of the connector plug 192 from different viewing directions. Figure 9a and Figure 9c Show the connection side of the connector plug 192 provided with the electrical contact 1108a. The protrusion 1116a can be clearly identified on this connection side, and the protrusion 1116a and the recess 1114a together form a guiding element, and the recess 1114a can be, for example, in Figure 8jIt is recognized that the guiding element helps to position the connector plug 192 on the battery pack 100. The protrusions 1116a and the recess 1114a of the battery pack 100 center the connector plug 192 on the battery pack 100. In this way, a blind mating of the battery pack 100 and the battery plug 192 can be performed. Figure 9b A representation of the battery plug 192 is shown as seen from the side opposite to the electrical contact 1108a.

[0118] The electrical contacts 1108a may include individual pin contacts. These pin contacts can be designed to be, for example, telescopically compressible, and in particular, a prestress can be provided for the extended state of the pin contacts. In this way, when the connector plug 192 is mated with the battery pack 100, the electrical contact closure can be reliably ensured by the resulting contact pressure, without any risk of the electrical contacts 1108a bending on the corresponding associated electrical contact surface 1112c, which can be specifically implemented as a smooth or flat surface. Each pin contact can have, for example, a spring-like element in order to achieve the prestress. However, alternative designs are also known to those skilled in the art. This design also allows the plug to be disconnected laterally from the battery pack.

[0119] The recess 1114b is likewise provided on the side opposite to the electrical contact 1108a, as Figure 9b shown, i.e., on the rear side of the battery plug 192. In addition, the electrical contact surface 1112a can also be recognized, where the electrical contact surface 1112a is used to electrically connect the connector plug 192 to the charging plug 190.

[0120] The entire interior of the connector plug 192 can be cast from a casting composition 1110a. Then, the casting composition 1110a forms the housing of the battery plug 192. Alternatively, a housing shell can also be manufactured, which is then tightly connected to each other in order to achieve a function similar to that of the housing of the casting composition 1110a, in particular fluid tightness. Providing interconnected housing shells can have advantages in terms of the replaceability or control of the individual components inside the connector plug 192, thus overall improving the environmental friendliness of the helmet light 10.

[0121] By means of different possible and matching combinations of the protrusions 1114a, 114b and the recesses 1116a, 1116b, a simple mating aid for the plug connection can be achieved, which does not impede the simple release in the case of a pulling force on the connector plug 192 and at the same time ensures that, in the absence of a pulling force, the electrical contacts closed by means of the plug connection remain firmly and most importantly correctly connected to each other. If the corresponding protrusions and recesses are asymmetrically arranged on the contact surface, a simple anti-rotation protection is achieved.

[0122] Figure 9d and Figure 9e shows possible internal arrangements of the connector plug 192 as seen from two substantially opposite viewing directions, such that the front and rear sides of this internal arrangement are visible. For simplicity, the cable connection of the connector plug 192 leading from the connector plug 192 is omitted. The PCB 1106a, on which the known electrical contacts 1108a are arranged, is located inside the connector plug 192 and is covered by a casting composition 1110a or a housing fulfilling the same function. Electrical contact surfaces 1112a can be identified on the opposite side. Both the electrical contacts 1108a and the electrical contact surfaces 1112a pass through the casting composition to the surface of the connector plug 192, such that additional elements can make electrical contact with the connector plug 192 on both elements. Two magnets 1104a are located in the lateral regions of the PCB 1106a. The magnets 1104a cooperate with corresponding mating parts in the battery pack 100 or the charging plug 190, such that a polarity reversal of the electrical connection can be excluded during connection. This serves as an additional safety measure. Furthermore, together with the corresponding mating parts on the battery pack 100, the magnets 1104a automatically pull the connector plug 192 into the correct position and ensure a firm hold together between the connector plug 192 and the battery pack 100 even under mechanical loads in the mating direction.

[0123] By means of this coupling and simultaneously connecting mechanism, if a user of the protective helmet 30 equipped with a helmet light system makes an inadvertent movement while wearing the protective helmet 30, the interlocking cable loop of the connecting cable 24 can generally be opened. Once the tension on the hooked cable loop exceeds the holding force that can be exerted by the magnets 204, 1104a, 1104b, the connector plug 192 is automatically released from the battery pack 100 when the cable loop opens. Furthermore, since the magnets 204, 1104a, 1104b automatically pull the two parts of the plug connection into the correct position, the connection of the connector plug 192 to the battery pack 100 is facilitated, thus greatly simplifying the blind closing of the connection.

[0124] Figure 10a and Figure 10b shows a three-dimensional external view of the charging plug 190 as seen from different viewing directions. Similar to the connector plug 192, from Figure 8d and Figure 8e the known charging plug 190 also has a protrusion 1116b. In addition, electrical contacts 1108b are provided on the same side of the charging plug 190. Similar to the connector plug 192, the housing of the charging plug 190 is likewise formed by a casting composition 1110b, where a fluid-tight arrangement of the individual housing elements (in particular the housing shell) is also possible here. Different from the case of the connector plug 192, in Figure 10aOn the side of the charging plug 190 opposite to the side with the electrical contact 1108b, there is no electrical contact surface. By means of possible combinations of the protrusion 116b and the recess, a simple engagement aid for the plug connection can be achieved, which does not impede the simple release in the case of a pulling force on the connector plug and at the same time ensures that, in the absence of a pulling force, the electrical contacts closed by means of the plug connection remain firmly and, most importantly, correctly connected to each other.

[0125] In this case, it can be provided that the protrusion and the recess are each formed asymmetrically, preferably asymmetrically at an edge of the respective connection surface. Thereby, a simple anti-rotation protection is achieved.

[0126] Figure 10c and Figure 10d show possible internal arrangements of the charging plug 190 seen from two substantially opposite viewing directions, such that the front side and the rear side of this internal arrangement are visible. The PCB 1106b of the charging plug 190 provided inside the charging plug 190 is respectively shown, similar to the connector plug 192, on which there are also provided an electrical contact surface 1112b, electrical contacts 1108b, and a magnet 1104b.

[0127] Therefore, the arrangement of the represented PCB 1106b is to a large extent similar to that of the Figure and ​ known PCB1106a. Since the PCB 1106b is associated with the charging plug 190, the PCB 1106b can have a different arrangement with respect to the represented electrical contact surface 1112b and electrical contacts 1108b, which arrangement particularly includes fewer individual electrical contact pins of the electrical contacts 1108b. This can be attributed to the fact that the charging plug 190 is usually attached last or only temporarily connected to the battery pack 100, especially when the electrical contacts 1108b of the charging plug 190 have to be "conducted" to the connector plug 194 of the battery pack 100 that has already been fastened to the battery pack 100. In this case, it can be envisaged that, for example, the PCB 1106b and the PCB 1106a are substantially the same in their respective arrangements, but, as required, particularly fewer electrical connection pieces are led out to the outside of the surface of the charging plug 190. If the same PCB can be used for the charging plug 190 and the connector plug 192, and for example only the assemblies with electrical components such as the electrical contacts 1108a and 1108b are changed, this can reduce the number of different components.

[0128] ​ and ​ each show a three-dimensional representation of the charging connection of the battery pack 100. In both ​ and ​In the lower region of, the battery body 194 of the battery pack 100 is partially visible. In ​ , in the upward terminal connection region of the battery body 194, a connector plug 192 has been placed. In ​ In the selected representation, the connector plug 192 includes a circumferential sealing lip 196 that points radially inward relative to the axially longitudinal extension of the battery body 194. The sealing lip 196 is axially located below the protruding circumferential collar 196a of the connector plug 192. The sealing lip 196 is particularly used to establish a sealed connection, i.e., a fluid-tight connection, between the connector plug 192 and the charging plug 190, which is not shown in ​ and can be placed on the battery body 194 in the axially extending direction. This is relevant because if moisture appears during the existing current flow between the connector plug 192 and the charging plug 190, the electrical connection point between the connector plug 192 and the charging plug 190 will be more severely corroded. It should be noted at this point that the connector plug 192 described above in ​ does not have such a collar 196a and also does not have a sealing lip 196, but can be supplemented with these elements in a simple manner. Alternatively, of course, it can also be envisaged that the collar 196a and the sealing lip 196 are not provided on the connector plug 192, but on the charging plug 190. Then, this will have the advantage that the electrical contact 1108b of the charging plug 190 protruding from the plane of the connector plug receives additional protection against mechanical damage from the collar 196a.

[0129] ​ Further shown are 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 surrounded by the sealing lip 196. Due to the arrangement structure of the charging contacts 198 and the communication contacts 200, a non-rotatable mounting of the not-shown charging plug 190 can be achieved. The special arrangement structure of the charging contacts 198 and the communication contacts 200 will be understood as an example. In particular, the charging contacts 198 and the communication contacts 200 can be further subdivided. It can also be envisaged that in addition to ​ the shown charging contacts 198 and communication contacts 200, additional contacts are also provided on the surface of the connector plug 192 surrounded by the sealing lip 196. When the electrical contact surface 1112a of the charging plug 190 on the connector plug 192 is implemented to be fixed in rotational movement, for example, half of the charging contacts 198 and the communication contacts 200 can be together inside the connector plug 192 in order to achieve simple fixity in rotational movement in this way. ​ and ​The connection surfaces of the battery pack 100 and the connector plug 192 shown in FIG each do not have projections or grooves, as described, for example, from the previous figures, in order to achieve anti-rotation protection. However, these can be supplemented in a simple manner.

[0130] ​ The upper portion of the battery body 194 of the battery pack 100 is shown without the connector plug 192. Similar to the free end of the connector plug 192, the upper portion of the battery body 194 includes a sealing lip 208, which is arranged behind a collar 208a in the axial direction of the battery body 194 and surrounds the end face of the battery body 194. Electrical contact surfaces in the form of communication contacts 202 and connection contacts 206 are also indicated on the end face of the battery body 194. The connection contacts 206 can be used both to power the connected helmet light 10 with electrical energy and to charge the battery pack 100. It should also be noted that the respective communication contacts 200, 202 and connection contacts 206 or charging contacts 198 are shown recessed relative to the respective end faces, i.e., located below the respective outwardly facing housing surface. This arrangement is optional; it is also possible for all or at least some of the contacts to terminate flush with the respective outwardly facing housing surface. Furthermore, a sealing lip 208 and an associated collar 208 a may likewise be arranged on the connector plug 192 .

[0131] Furthermore, a magnet 204 is indicated on the end face of the battery body 194, which can hold the connector plug 192 on the battery body 194 in the desired connection position. Like the sealing lip 196 on the connector plug 192, the sealing lip 208 ensures waterproof electrical contact between the battery body 194 and the connector plug 192 or the charging plug 190 (if the charging plug 190 is directly connected to the battery body 194 to charge the battery pack 100) that can be connected thereto. The magnet 204 is ​ , shown on the visible surface of the end face of battery body 194. However, they can also be arranged invisible, particularly to prevent corrosion of magnets 204, and arranged beneath the protective casing of battery body 194, i.e., within the housing of battery body 194. This arrangement of magnets 204 is optional. However, if magnets 204 are present, given the appropriate selection of the magnetic poles pointing away from battery body 194, they can not only serve to secure the plug to be connected in the desired position but also provide anti-rotation protection, provided that the plug to be connected, connector plug 192, or charging plug 190 also has appropriately oriented magnets.

[0132] ​ and ​ The internal arrangement of the battery pack 100 is shown from different viewing directions. ​ and ​Two battery cells 1118 can be separately identified therein. These battery cells 1118 have a conventional cylindrical shape in the axially extending direction. The PCB 1106d and the cover 1122, which is electrically insulated from the PCB 1106d, can be identified on the ​ surface that points downward or backward therein and on the ​ surface that points forward or upward therein. The cover 1122 can be made of, for example, a metal sheet and is electrically insulated from the PCB 1106d. Also indicated on the PCB 1106d are electrical contact surfaces known from ​ but in an arrangement different from ​ .

[0133] In addition to the PCB 1106d, another PCB 1106c is located on the upward-facing surface of the battery cell 1118, on which a foil cover 1120 is indicated, and the foil cover 1120 can have button and display functions for the battery pack 100. The button and display functions of the foil cover 1120 have been previously explained in the cases of ​ and ​ . ​ The components shown in ​ can be, for example, cast into the housing of the battery body 194 or otherwise integrated to form the battery pack 100, as shown in the thumbnail in the upper right corner of ​ , where the battery pack 100 is shown there together with the connectors and charging plugs 190, 192, which are not described in detail here. The external shape of the battery pack 100 can of course be of a variable design and, in particular, does not have to exactly correspond to the thumbnail.

[0134] A battery pack temperature sensor can also be arranged inside or on the surface of the battery pack 100. The battery pack temperature sensor can detect the battery pack operating temperature value of the battery pack, and this battery pack operating temperature value is, for example, transmitted to and received by the control controller of the helmet light 10. Based on the received battery pack temperature value, the control controller can then change the operating state of the helmet light 10, for example, in order to keep the battery pack 100 within the allowable temperature range. The battery pack 100 also includes an electrical heating unit, which can be controlled by the control controller, in particular based on the received battery pack temperature value. For example, if the battery pack 100 drops below the lower temperature threshold T Akku_min , the control controller can turn on the electrical heating unit. Of course, when another threshold slightly greater than the lower temperature threshold T Akku_min is exceeded, advantageously, the turn-off of the electrical heating unit can also be temperature-controlled in a similar hysteresis manner. If the detected battery pack operating temperature value of the battery pack 100 exceeds the allowable temperature threshold T Akku_max, the control controller can further reduce the light output of the helmet light. By reducing the light output, i.e., reducing the brightness of the helmet light 10, the power obtained from the battery pack 100 is reduced, which directly results in a reduction in the generated waste heat, so that the temperature of the battery pack 100 can drop, assuming a constant emissivity of the waste heat to the environment. This can be advantageous, for example, in an environment with an explosion risk.

[0135] ​ Various three-dimensional representations of the battery holder 214 are shown. The battery holder 214, which is at least partially represented in each figure, includes 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 surface having rounded edges. As can be discerned in ​ , the frame 220 narrows at one end face in the axially extending direction, such that the battery pack 100 cannot enter or leave the frame 220 on this side. However, at the opposite end face in the axially extending direction of the frame 220, the frame 220 is formed in its cross-section to be substantially non-narrowing relative to the rest of the frame 220, such 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 for the easy insertion of the battery pack 100 with a constant cross-section. The battery pack 100 can be fixed in the frame 220 of the battery holder 214 by elastic tabs 224. By being tapered, a stop can be achieved when the battery pack 100 is inserted into the battery holder 214, wherein the tabs 224 arranged at the other end simultaneously clamp the inserted battery pack 100 within the frame 220. The frame 220 of the battery holder 214 encloses a space in which the battery pack 100 can be arranged, such that most of the area remains empty, so that the battery pack 100 remains visible through the frame 220 of the battery holder 214. In this way, in particular, sufficient heat dissipation of the battery pack 100 during the charging / discharging process can be ensured, since the frame 220 does not otherwise thermally insulate the inserted battery pack 100 from the environment.

[0136] The frame 220 of the battery holder 214 is further adjacent to the upper retaining arms 216a and 216b. The upper retaining arms 216a and 216b each lead to the upper retaining hooks 218a, 218b, which are ultimately used to fasten the battery holder 214 to the helmet housing 36. The upper retaining hooks 218a and 218b each include a step 223, the function of which will be explained in more detail later. In addition, the lower retaining hooks 222a and 222b are also directly arranged on the frame 220 of the battery holder 214. The upper retaining hooks 218a, 218b and the lower retaining hooks 222a, 222b together are used to firmly fix the battery holder 214 to the helmet housing 36. The exact interaction of the upper retaining hooks 218a, 218b and the lower retaining hooks 222a, 222b with the helmet housing 36 will be described in more detail later.

[0137] ​ The special design of the battery holder 214 described in is used to ensure the safety of the user of the protective helmet. Thus, by providing the upper retaining hooks 218a, 218b and the lower retaining hooks 222a, 222b, a fixed positioning of the battery holder 214 on the helmet housing 36 is achieved, which remains easily detachable if this should be necessary. An object (such as a tree branch) hitting the protective helmet 30 from above can slide down along the protective helmet 30, and during this process, if it gets stuck with the battery holder 214, the battery holder 214 will be released from the protective helmet 30 without tearing the protective helmet 30 off the head of the user wearing the protective helmet 30 and without subjecting the user to the full impact force of the hitting object.

[0138] The orientation of the open hook - hanging sides of the upper retaining hooks 218a, 218b in the direction of the open hook - hanging sides of the lower retaining hooks 222a, 222b ensures that in the case where an object hits the protective helmet 30 from above and hits the battery holder 214, a release force is generated, which first loads the closed sides of the upper retaining claws 218a, 218b so that they can break under the impact force and thus initiate the release of the battery holder 214 from the helmet housing 30. At the same time, the lower retaining claws 222a, 222b are pushed down along their opening direction by the helmet housing 30, so that the battery holder 214 is completely released from the helmet housing 30. Since the open hook - hanging sides of the upper retaining hooks 218a, 218b are larger than the open hook - hanging sides of the lower retaining hooks 222a, 222b, as shown in the figure, the battery holder 214 can be easily fastened to the helmet housing 30 because the bending of the upper retaining hooks 218a, 218b during the fastening process requires a relatively small force. At the same time, with this construction, the force required to break the upper retaining hooks 218a, 218b remains relatively small, so that the release of the battery holder 214 in an emergency situation (i.e., when an object hits the protective helmet 30 from above) also occurs simply and easily.

[0139] ​ The front view shows the helmet shell 36 with the helmet light 10. The viewing direction also shows the lens unit 14 of the helmet light 10, which faces the observer. In the front view shown, in particular, it can also be recognized that the helmet light 10 is fixed to a part of the helmet shell 36. Regarding the fixation of the helmet light 10 to the helmet shell 36, for example, from ​ or ​ it is known that fastening points in the form of front retaining claws 112 and 114 hook into notches / grooves 58 in the 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 such that there is a surface that can be grooved. The two front retaining claws 112, 114 of the helmet light 10 hook into the notches / grooves 58 provided there during installation, where for this purpose, when the helmet light 10 is pressed against the helmet shell 36, elastic deformation occurs in the front retaining claws 112, 114 or the helmet shell 36 in the case where the front retaining claws 112, 114 are more elastic than the helmet shell 36. When the helmet light 10 has reached the installation position, the elastic deformation reverses, and the front retaining claws 112, 114 snap into the notches / grooves 58 at the front edge 56. Alternatively, it can also be envisaged that the helmet shell 36 is more elastic in the region of the notches / grooves 58 than the front retaining claws 112, 114, such that the elastic deformation during installation occurs essentially at the notches / grooves 58, while the front retaining claws 112, 114 remain essentially dimensionally stable.

[0140] ​ A detailed view of the helmet shell 36 with the helmet light 10 fastened to the helmet shell is shown. In ​ a viewing direction different from the viewing direction of 14a is selected such that the helmet light 10 is shown as seen from "below", and thus the helmet shell 36 is also seen from "below". The switch 120, the anti-glare shield 124, the retaining elements 122 arranged on the right and left, and the cooler element 20 with cooling ribs and a circumferential flange having a cooler element can be seen from the helmet light 10.

[0141] The bent shape of the covering element 22 ensures in particular by means of the retaining elements 122 arranged at the right and left ends respectively that the helmet light 10 clamped into the helmet shell 36 cannot slide laterally, but remains firmly fixed in the central position. As already mentioned, for example, clamping occurs in cooperation with the front retaining claws 112 and 114 that are not visible in ​ and the rear retaining claws 116, 118 that hook the helmet light 10 on the reinforcement ribs 62 of the helmet shell 36 on the side of the helmet light opposite to the front retaining claws 112 and 114. <>

[0142] ​ A section of the helmet shell 36 as seen from above is shown.​ shows a section of the helmet shell, where the helmet light is fastened to the helmet shell from the inclined bottom. In ​ , the front edge 56 of the helmet shell 36 in particular and the structure in the form of a contour line present on the surface of the helmet shell 36 and serving to reinforce the helmet shell 36 can be recognized. The contour line present on the upper side of the helmet shell 36 can in particular interact with the aforementioned reinforcing rib 62 on the inner side of the helmet shell 36 in order to achieve the desired mechanical stability. On the other hand, in ​ , the helmet light 10 and the front edge 56 with the notch / groove 58 can be recognized more clearly, and the front retaining claws 112 and 114 are hooked in the notch / groove 58. 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 restricts the mobility of the front retaining claws 112 and 114 in the notch / groove 58 on the front edge 56 of the helmet shell 36.

[0143] ​ A detailed view of the helmet shell 36 is partially shown, where the helmet light 10 is fastened to the helmet shell 36 from the lower oblique side. In particular, the anti-glare shield 124, the front retaining claw 112, one of the retaining elements 122, the switch 120, the cooler element 20 with associated cooling ribs and circumferential flange, the plug connection 3000, and the rear retaining claws 116, 118 hooked in the reinforcing rib 62 can be seen from the helmet light 10. In order to mount the helmet light 10 on the helmet shell 36, first the helmet light 10 is inserted into the reinforcing rib 62 by means of its rear retaining claws 116, 118, and then the helmet light 10 is pressed upwards obliquely in the direction of the front edge 56 of the helmet shell 36, so that after the participating fastening points and / or elastic deformation of the helmet shell 36, the front retaining claws 112 and 114 can each engage in the associated part of the notch / groove 58 on the front edge 56 of the helmet shell 36. The bent retaining element 122 also contributes to the reliable centering of the helmet light 10 and can form, for example, a clamp-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, in an embodiment not shown, it is also conceivable to hook into another internal structure on the inner side of the helmet shell 36, but this structure is at least closer to the edge of the helmet shell 36 compared to the internal structure in the form of the reinforcing rib 62 into which the rear retaining claws 116, 118 are hooked. The reinforcing rib 62 also serves to reinforce the helmet shell 36, just as in ​like the recognizable structure on the upper side of the helmet shell 36 therein. Branches 64 in the form of extensions of the reinforcing ribs 62 arranged on the inner side of the helmet shell 36 can also contribute to the positioning of the helmet light 10 during and after its mounting on the helmet shell 36, in that they can, for example, limit the possible positions of the rear retaining claws 116, 118 when the helmet light 10 is inserted onto the reinforcing ribs 62.

[0144] ​ A three-dimensional overall view of the helmet shell 36 is shown, in which the helmet light 10 is fastened to the helmet shell 36 from below. In ​ inside the helmet shell 36 represented in, the support cage 42 is indicated, which will be described in more detail below and which is an integral part of the protective helmet 30 with the helmet shell 36. In the case of the support cage 42, mention will be made of the tensioning unit 48 by means of which the support cage 42 can be dimensionally adapted to the user's head size, in particular during donning and doffing. In ​ pointing to the right, the helmet light 10 is shown as fastened to the helmet shell 36 in the "front" region of the helmet shell 36. Also recognizable in this front region is the face protection device 32, which is connected to the helmet shell 36 via ​ a bow construction not described in more detail in and is pivotally mounted on the helmet shell 36. In the ​ left region corresponding to the "rear" region of the helmet shell 36, a battery holder 214 is indicated, which is intended to accommodate the battery pack 100. The helmet light 10 is connected to the battery pack 100 present in the battery holder 214 via the connecting cable 24. The connecting cable 24 can be fixedly or detachably connected to the helmet light 10, as has been explained in more detail in ​ the case of. On the opposite side of the helmet light 10, a connection plug connector 3002 is also provided, which is also known from ​ and to which a further connecting cable 28 is inserted. In particular, the connection plug connector 3002 on which the further connecting cable 28 is arranged can be used to connect the "helicopter light" described in more detail above to the helmet light 10. In particular, the battery holder 214 indicated in the rear region of the helmet shell 36 can be fastened to the opening present in the helmet shell 36 via the upper retaining hooks 218a, 218b indicated only in ​ wherein the lower retaining hooks 222a and 222b of the battery holder 214 are covered by further elements of the protective helmet 30 in the representation chosen in ​ .

[0145] ​Shows a further detailed view of a section of the helmet shell 36 with the helmet light 10 fastened thereto as seen from below. Many of the depicted components of the helmet light 10 are already known from the previous figures. In ​ it is possible to identify, in addition to the helmet light 10, a pair of protective goggles 130 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 a manner pivotable relative to the helmet shell 36. In this way, they can be pivoted out of the helmet shell 36 so that they substantially provide protection for the eyes of the user wearing the protective helmet 30, or can be pivoted back under the helmet shell 36. The helmet light 10 is substantially located within the helmet shell 36 and between the protective goggles 130 and the helmet shell 36. In particular, the helmet light 10 is located in the free space which generally remains between the protective goggles 130 and the helmet shell 36 when the protective goggles 130 are pivoted back into the helmet shell 36.

[0146] In addition to the protective goggles 130, ​ a support cage 42 is also indicated which, as seen from the helmet shell 36, is positioned even further "inward" away from the helmet shell 36 so that, from the outside inwards, first the helmet shell 36 is positioned, then the helmet light 10, then the protective goggles 130, and finally the support cage 42.

[0147] ​ and ​ shows a detailed view of a cutout of the helmet shell 36 as seen from a different viewing direction, to which the battery holder 214 is fastened. The battery holder 214 is empty in the figures, that is, in particular, no battery pack 100 is pushed into the battery holder 214. There are openings on the helmet shell 36 which can be aligned with the ventilation opening 53 which is in turn provided on a ventilation slider 50 which was described, by way of example, in ​ The ventilation slider 50 is fixed to the helmet shell 36 in a displaceable manner so that the opening on the helmet shell 36 can coincide (open) with the ventilation opening 53 on the ventilation slider 50 or can be displaced relative to each other so that the opening on the helmet shell 36 is at least mostly closed by the ventilation slider 50. The opening on the helmet shell 36 and the ventilation opening 53 on the ventilation slider 50 can be arranged symmetrically, in particular, with respect to the symmetry plane of the helmet shell 36 which extends from the rear (i.e., from the battery holder 214) to the front (i.e., the helmet light 10).

[0148] ​ represents the open state of the ventilation opening 53 during the installation of the battery holder 214, while ​Indicates the closed state with the battery retainer 214 installed. In the closed state, the opening provided in the helmet housing 36 is mostly covered by the ventilation slider 50.

[0149] The battery retainer 214 is inserted by means of the upper retaining hooks 218a and 218b through the ventilation openings 53 provided in the ventilation slider 50 and the associated openings in the helmet housing 36, such that the step 223 can rest on the edge of the respective ventilation opening 53 and the respective upper retaining hooks 218a and 218b can engage in the helmet housing at the edge of the opening facing the rear lower edge of the helmet housing 36. Simultaneously or subsequently, the lower retaining hooks 222a and 222b are pushed over the rear lower edge of the helmet housing 36 such that, due to the existing elasticity of the material of the battery retainer 214 (which allows for a certain elastic deformation, especially in the region of the upper retaining arms 216a and 216b and the frame 220 of the battery retainer 214), the lower retaining hooks 222a, 222b snap in. There can also be an order for installing the battery retainer 214 on the helmet housing 36 that deviates from the above order.

[0150] Thus, during the ​ associated installation process, the battery retainer 214 can also first be hooked onto the lower edge of the helmet housing 36 by means of the lower retaining hooks 222a and 222b and then pressed forward / upward such that the upper retaining hooks 218a and 218b pass through the ventilation openings 53 and the openings in the helmet housing 36. This state is visible in ​ . The upper retaining hook 218a has not yet engaged in the lower edge of the opening in the helmet housing 36. When the battery retainer 214 is released, the above situation changes since the elastic deformation of the battery retainer 214 reverses and the upper retaining hooks 218a and 218b engage downward at the edge of the opening in the helmet housing 36. By means of the provided step 223, the displaceability of the ventilation slider 50 is largely maintained such that the opening provided in the helmet housing 36 remains at least mostly covered by the ventilation slider 50 and can thus be closed.

[0151] If an object strikes the helmet shell 36 from above, then a part of the impact force due to the object striking the helmet shell 36 and the battery holder 214 is first reduced due to the elastic deformation of the battery holder 214 (in particular the upper retaining arms 216a, 216b). Thus, the upper retaining arms 216a, 216b allow for greater flexibility of the battery holder 214, which is already helpful during the installation of the battery holder 214 on the helmet shell 36. Moreover, this causes the upper retaining hooks 218a, 218b to break later. Therefore, when the upper retaining hooks 218a, 218b finally break due to excessive deformation, it is generally ensured that the battery holder 214 completely detaches from the helmet shell 36 and falls downward, rather than merely remaining partially fixed to the helmet shell 36 and hanging on the helmet shell 36.

[0152] The recognizable step 223 rests against the edge of the helmet shell 36, such that the ventilation slider 50, which is mounted on the helmet shell 36 in a displaceable manner, can be displaced beyond the step 223 in the direction of the edge of the opening in the helmet shell 36. This enables the ventilation slider 50 to further close the ventilation opening 53 in the helmet shell 53, through which the upper retaining hooks 218a, 218b engage in the helmet shell 36.

[0153] In ​ it is possible to recognize the structure of the ventilation slider 50, on which LEDs known from ​ are arranged on both sides of the edge 4004, namely the helicopter LED 4000 and the additional helicopter LED 4002a, which have different beam directions with respect to the edge 4004. In ​ the beam directions of the two helicopter LEDs 4000 and 4002a that can be recognized can be implemented to be substantially perpendicular to each other, such that for example the helicopter LED 4000 can be used as a "rear light" in the case of an upright support, while the additional helicopter LED 4002a then emits a beam upward and is visible from above. On the other hand, if the wearer of the protective helmet 30 bends down, the helicopter LED 4000 irradiates upward. If desired, additional LEDs with, for example, a "lateral" beam direction can be provided.

[0154] ​A detailed view of the helmet shell 36 is partially shown, which has a battery holder 214 fastened to the helmet shell 36 and a battery pack 100 inserted therein. In the rear region of the helmet shell 36, in particular, two lower retaining hooks 222a and 222b can be identified that surround the lower rear edge of the helmet shell 36 and are directly arranged on the frame of the battery holder 214. Below the helmet shell 36, the indicated tensioning unit 48 can be further identified, which will be explained in more detail in the context of the already mentioned support cage 42. The connecting cable 24 protrudes from the interior of the helmet shell 36 and extends into the battery holder 214, and a connection is established between the helmet light 10 fixed in the front region of the helmet shell 36 and the battery pack 100 inserted into the battery holder 214 via a connector plug 192 that is not separately visible, where the battery pack 100 is held in the frame of the battery holder 214 by elastic tabs 224.

[0155] ​ A first front view of the protective helmet 30 is shown, in which the helmet light 10 is fastened to the protective helmet 30 from the front, while ​ A second front view of the protective helmet 30 is shown, in which the helmet light 10 is fastened to the protective helmet 30 from the front, and ​ A third front view of the protective helmet 30 is shown, in which the helmet light 10 is fastened to the protective helmet 30 from the front. ​ Represents the helmet light 10 in its mounted state, such that on the one hand, the front-facing lens unit 14 of the helmet light 10 can be identified, and further, the front retaining hooks 112 and 114 engaged in the notch / groove 58 can be seen. The protective helmet 30 shown also includes a face protection device 32 that is pivotally fixed relative to the helmet shell 36, and the face protection device 32 can in particular be formed by an open metal grid and a frame that reinforces the metal grid in order to protect the face of the user 26 wearing the protective helmet 30 in the downward pivoted state. Different material selections, such as plexiglass or plastic grids, are also conceivable and can be provided as required. In particular, it can be seen from ​ the protective function for the user 26, where the face protection device 32 is pivoted downward relative to the helmet shell 36 of the protective helmet 30 and is located between the user 26 and the observer in the viewing direction. In ​ as in ​ the face protection device 32 is pivoted upward relative to the helmet shell 36 of the protective helmet 30. However, at the same time, the equally provided protective goggles 130 are pivoted downward, such that as already in ​As in the case of the face protection device 32, the protective goggles 130 are located between the user 26 of the protective helmet 30 and the observer in the viewing direction. The task of the protective goggles 130 is, of course, especially to protect the eyes of the user 26 from dust and dirt.

[0156] In the case of the protective goggles 130, it can further be stipulated to select the material of the protective goggles 130 that adapts to the eyesight of the user 26. This means that the protective goggles 130, which are also pivotally mounted relative to the helmet shell 36, can assume the task of visual assistance in the sense of a pair of goggles for the user 26.

[0157] ​ A detailed view of the protective helmet 30 is shown, in which the helmet lamp 10 is fastened to the protective helmet 30 from an oblique upper direction. ​ The protective helmet 30 is shown, in which the face protection device 32 is pivoted upward relative to the helmet shell 36, and from this perspective as well, on the one hand, the front edge 56 of the helmet shell 36 remains visible, although the notch / groove 58 previously recognizable in ​ is located below the helmet shell 36 and is not visible to the observer, and the face protection device 32 is also located between the helmet lamp 10 and the observer from this perspective. Correspondingly, the helmet lamp 10, like the face of the user 26 of the protective helmet 30, is arranged to be protected from external mechanical influences by the face protection device 32.

[0158] The protective helmet 30, which is especially formed for use in forestry, is shown in a side view in ​ and ​ with different accessories, and is shown in an exploded view and partially in cross-section in ​ Thus, in ​ in particular, the inner side of the helmet shell 36 is visible. The protective helmet 30 includes a face protection device 32 and a hearing protection device 34. In addition, the protective helmet 30 includes a helmet shell 36 and an internal accessory assembly 40, which includes a support cage 42, a headband 44, and a neckband 46. The neckband 46 is equipped with a tensioning unit 48. The helmet shell 36 is externally provided with ventilation sliders 50 through which the openings 52 formed in the helmet shell 36 can be opened and closed.

[0159] Three support arms formed as spacers serve as means for fastening the internal accessory or the internal accessory assembly 40 to the helmet shell 36 at three points, where in ​Only two support arms 54 are visible. In order to lock the support arms 54 extending in the longitudinal direction of the helmet shell 36 to the helmet shell 36, slots are provided in the rear head region of the helmet shell 36, in which the free ends of the support arms 54 having corresponding shapes pointing in the longitudinal direction can be releasably engaged on the helmet shell 36. The dimensions and arrangement of the helmet shell 36 and the support arms 54 are designed (i.e., so long in dimension and so wide in its net width) such that a free space exists between the inner accessory assembly 40 and the helmet shell 36 for receiving the helmet light 10, the associated wiring, the hearing protection bladder 35a of the hearing protection device 34 and other helmet accessories, and at least the fastening means for the face protection 32 and the hearing protection device 34. Other helmet accessories include the tensioning unit 48 of the neck strap 46 already mentioned.

[0160] Hereinafter, the helmet shell 36, the inner accessory assembly 40, their connection to the helmet shell 36, and then the individual components of the helmet accessories will be briefly described separately, which components include the hearing protection device 34, the face protection device 32, and their fastening means and the tensioning unit 48. The helmet shell 36 is formed as a one-piece molded plastic part. For example, a suitable plastic for the helmet shell 36 is ABS.

[0161] The helmet shell 36 extends forward to such an extent that it simultaneously serves the function of a visor above the eyes of the user 26. Thus, the helmet shell 36 has an outer surface that rises uniformly in the backward direction in its front region without any significant gradation such that it does not provide any hooking points to obstacles such as tree branches. Transversely extending reinforcing ribs 62 are formed on the inner surface of the helmet shell 36 and in the front helmet region and the central helmet region. Additional reinforcing ribs extending in the longitudinal direction of the protective helmet 30 can be integrally formed transversely to the reinforcing ribs 62 and in the center. In the central region of the helmet shell 36, the reinforcing ribs 62 adjoin a region that is slightly recessed inward and has a pair of openings 52. In this recessed region, the ventilation slider 50 is displaceably arranged on the outer surface of the helmet shell 36 and is engaged in two front guide slots on the helmet shell 36 by means of downward and inwardly protruding retaining buttons and in two rear guide slots on the helmet shell 36 by means of two additional holding knobs. The ventilation slider 50 includes ventilation openings 53, which are arranged in alignment with the openings 52 ( ​), and in the venting position, the vent opening 53 is located above the opening 52, while in the closed position, the vent opening 53 is arranged offset such that the opening 52 is closed by the vent slider 50. The lower edge of the protective helmet 30 extends laterally downward in the region of the temples and also laterally downward in the region of the rear of the head. Thus, the above-mentioned free space between the inner fitting assembly 40 and the helmet shell 36 expands downward in these regions. This facilitates attaching the fastening means to the inner side of the helmet shell 36 and accommodating the hearing protection bladder 35a in the free space between the helmet shell 36 and the support cage 42.

[0162] In the above-mentioned temple region, three rod-shaped protrusions 74b are integrally formed on each side of the inner side of the helmet shell 36, and the inner fitting assembly 40 with the lateral support arms 54 can be fastened to the three rod-shaped protrusions in a form-fitting and releasable manner. The rod-shaped protrusions 74b can be identified in the cross-sectional view of the helmet shell 36 in ​ . The rod-shaped protrusions 74b are respectively hollow profile members, the cross-section of which is square and is integrally formed with the leg region on the inner side of the helmet shell 36. In the region of the rod-shaped protrusion opposite to the leg region, the rod-shaped protrusion 74b is arranged to stand freely in front of the inner surface of the helmet shell 36. The connection of the rod-shaped protrusion 74b to the inner side of the helmet shell 36 and its transition to the helmet shell 36 in the region adjacent to the connection point in the form of a triangular gusset are strengthened by an additional integrally formed rib between the rod-shaped protrusion 74b and the helmet shell 36, such that the rod-shaped protrusion 74b is substantially rigidly connected to the helmet shell 36. If a force is applied to the rod-shaped protrusion 74b transversely to the longitudinal direction of the rod-shaped protrusion 74b, and this force tends to bend the rod-shaped protrusion 74b, then the rod-shaped protrusion 74b tends to deform the helmet shell 36 accordingly.

[0163] At the rear end, the helmet shell 36 is provided with a recess 76 at the central lower edge, and behind the recess 76, when the protective helmet 30 is fully assembled, the tensioning unit 48 of the neck strap 46 is positioned and thus accessible for manual actuation to tension or relax the neck strap 46.

[0164] The fastening means for the hearing protection device 34 The hearing protection device 80 has two hearing protection device support points 80a on the inner side of the helmet shell 36. The hearing protection device support points 80a are pivot support parts integrally formed on the inner side of the helmet shell 36, or preferably are attached as additional parts in a non-detachable manner. The support bracket 37a with the corresponding hearing protection bladder 35a is pivotally mounted in the hearing protection device support points 80a.

[0165] Fastening device for the face protection device 32. The face protection device 84 has two face protection device support points 84a on the inner side of the helmet shell 36. The holding arms 132a of the visor 132 are pivotally mounted in the face protection device support points 84a. The face protection device support points 84a are not formed on the inner side of the helmet shell 36, but are respectively formed on plugs 136a which are plugged onto the rod-shaped protrusions 74b in order to simultaneously fix the free ends of the support arms 54 to the rod-shaped protrusions 74b. The face protection device support points 84a are positioned such that their assigned plugs 136a are in the following free space in the mounted state, namely in the region where the helmet shell 36 is pulled down at its lower edge, as already explained above.

[0166] The inner fitting assembly 40 is the part of the protective helmet 30 that contacts the head of the user 26 and consists of a support cage 42, a headband 44 and a neckband 46 equipped with a tensioning unit 48. The inner fitting 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 the user 26.

[0167] The support cage 42 is formed of a rigid-elastic-flexible material, preferably a plastic such as polyamide. The support cage 42 is provided in two temple regions and in the rear head region and has rigid support arms 54 which project downwardly or rearwardly at an angle and together serve to fasten the inner fitting assembly 40 to the helmet shell 36 in a three-point manner. This arrangement provides a free space which extends continuously around the inner fitting assembly 40 in the helmet shell 36 and which in turn serves to receive the hearing protection bladder 35a, the helmet lamp 10 and other helmet accessories and also to receive the fastening devices 80, 84 for the face protection device 32 and the hearing protection device 34. In the exemplary embodiment described here, the support cage 42 is produced as a one-piece molded plastic part. The support cage 42 can be formed by two pairs of mutually spaced support strips which intersect in the center and merge their lower ends at four connection points into a single circumferentially closed support strip. In particular, a decorative material piece in the form of a cross can be provided which rests on the support strips in order to increase the wearing comfort.

[0168] The support arms 54 can project from the support cage 42, in particular at the connection points. The headband 44 is integrally formed on the support cage 42. The neckband 46 has two front ends which are releasably connected, for example by a buckle connection not shown in more detail, to the rear free end of the headband 44. According to ​ and ​In the representation shown, the neckband 46 has two free ends which can be detachably connected to one another in the neck region, specifically by means of a tensioning unit 48. The neckband 46 can be formed from the same material as the support cage 42. The neckband 46 is connected to the support cage 42 in a height-adjustable manner between its connection to the headband 44 and its free ends. For this purpose, the support cage 42 has two downwardly projecting support arms on which the neckband 46 can be fixed at selectable heights. The neckband 46 has, on each side, three holes arranged one above the other which can be latched onto resilient bolts 49 projecting on each support arm.

[0169] In the above example, the support arms 54 are fastened to the helmet shell 36 in a different manner, but this is not absolutely necessary. The support arms 54 can all be fastened to the helmet shell 36 in the same manner. For this purpose, only the different fastening devices would have to be standardized.

[0170] To fasten the inner fitting assembly 40 to the helmet shell 36 in three points, the rearwardly projecting support arms 54 are inserted into slots provided in the helmet shell 36 for this purpose until projections provided on the support arms 54 engage on the outside of the helmet shell 36. The inner fitting assembly 40 is then moved further inwards in the direction of the inner surface of the helmet shell 36, where the laterally extending support arms 54 pass over the bar-shaped projections 74b. In this case, the through holes in the laterally extending support arms 54 receive the bar-shaped projections 74b in a form-fitting manner. When the laterally extending support arms 54 rest in the gussets between the helmet shell 36 and the bar-shaped projections 74b on the inside of the helmet, the plug 136a is plugged onto the bar-shaped projections 74b in order to thereby fix the laterally extending support arms 54 in place. The inner 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 has been fastened to the head by means of the tensioning unit 48, optionally, a chin strap (not shown) can be tightened under the chin. The through openings in the laterally extending support arms 54 engage the bar-shaped projections 74b over a length which is at least as large as the clear width of the through opening. When a force is applied to the support arms 54 from above by loading of the helmet 30, the support arms 54 are tensioned by the helmet shell 36 which bears on the ends of the support arms. By this force acting on the support arms 54, a torque is generated at each of the three points which tends to deform the helmet shell 36 inwards until the lower edge. The helmet shell 36 thus converts a part of the force acting on it into deformation energy and thus reduces the force acting on the person wearing the protective helmet 30. The transmission of the torque from the support arms 54 to the helmet shell 36 is further enhanced by the fact that the support arms 54 are additionally reinforced by integrally formed ribs.

[0171] The hearing protection device 34 includes hearing protection bladders 35a, each of which is pivotally mounted in a forked support bracket 37a. The helmet shell 36 has fixed hearing protection device support points 80a on its inner side. In ​ , the hearing protection device support points 80a are shown together with the support cage 42, but the support points are attached to the inner side of the helmet shell 36 and not to the support cage 42. ​ The representation in

[0172] is only intended to illustrate where the hearing protection device support points 80a are located in space relative to the support cage 42 of the inner accessory assembly 40. The support brackets 37a provided with the hearing protection bladders 35a are pivotally mounted in the hearing protection device support points 80a. The hearing protection device support points 80a and the support brackets 37a are arranged and shaped such that the support brackets 37a can pivot in the free space between two positions. In the operating position, the hearing protection bladders 35a cover the ears of the user 26. In the storage position, the hearing protection bladders 35a are retracted into the free space in the helmet shell 36.

[0173] Each support bracket 37a is shaped to be bendable in a spring-loaded manner in the region between its two ends, where the support bracket 37a extends in the free space, such that the hearing protection bladders 35a are folded away from the ears respectively in the non-bent positions of each support bracket 37a and are folded against the ears respectively in the bent positions of the support brackets 37a. If the protective helmet 30 is not placed on the head, the two hearing protection bladders 35a in the latter part each reach a position significantly more inward than the ears where each hearing protection bladder 35a is to be placed. In other words, the mutual spacing of the hearing protection bladders is significantly smaller than the mutual spacing of the ears in this case. This ensures that when the protective helmet 30 is worn, the hearing protection bladders 35a are held pressed against the ears by spring preloading. The spring preloading for bending each support bracket 37a between two defined positions is achieved by an annularly bent bow spring 92a. Each support bracket 37a can be manually moved to the bent position and the non-bent position. In each of these positions, the bow spring 92a achieves end position locking. When the protective helmet is worn, end position locking of the support brackets 37a is not achieved because, as described above, each hearing protection bladder 35a will be held elastically pressed against the ears.

[0174] The face protection device 32 will be described in more detail below. ​The protective helmet 30 is shown in an exploded view and partly in section, in which the face protection device 32 can be identified in association with other helmet accessories.

[0175] The face protection device 32 includes a face shield 132 having two retaining arms 32a and two plugs 136a, on which face protection device support points 84a are integrally formed respectively as fastening means for the face protection device 84. The plugs 136a are plugged onto the rod-shaped protrusions 74b, whereby the face protection device support points 84a rest in the temple region located inside the helmet shell 36. In ​ the plugs 136a with the face protection device support points 84a can be identified. The components of the opposite arrangement of this fastening are not shown. Each face protection device support point 84a has three axially protruding elastic flexible cams 85a, onto which the retaining arms 132a can be pushed with an annular support bushing in order to fasten the retaining arms 132a in a detachable and pivotable manner in the face protection device support points 84a. The face protection device support points 84a and the retaining arms 132a are arranged and formed in such a way that each retaining arm 132a can pivot between two positions in a free space, namely the operating position and the storage position, in the operating position, the face shield 132 is folded downwards and protects the face ( ​ ), while in the storage position, the face shield 132 is folded upwards and arranged in close contact with the outer surface of the helmet shell 36 ( ​ and ​ ). The fastening means 84 for the face protection device 32 includes a self-locking retainer for each retaining arm 132a. For this purpose, each plug 136a includes a spring-biased bolt, which holds the annular support bushing 134a attached to the retaining arm 132a in the operating position and the storage position under spring prestress.

[0176] The face shield 132 forms a fork with each retaining arm 132a ( ​ ), in which the wall of the helmet shell 36 is tightly received when the face shield is opened. When the face shield 132 is closed, its upper edge rests on the front edge of the helmet shell 36, and the lateral edges of the face shield 132 rest on the outer surface of the helmet shell 36. Thus, for example, during forestry work, when the protective helmet 30 is used, whether the face shield is closed or open, tree branches cannot hook onto the retaining arms 132a or onto the face shield 132 itself, and endanger the user 26.

[0177] The tensioning unit 48 is briefly described below. The tensioning unit 48 is an additional helmet accessory in addition to the hearing protection device 34 and the helmet light 10, and like the hearing protection device 34, it is always within the contour of the helmet shell 36, so that there are no protruding parts on which obstacles can get stuck in the area of the tensioning unit 48. Both ends of the neck strap 46 are releasably connected in the neck area by the tensioning unit 48. The tensioning unit 48 includes a retainer 168, and the free ends of the neck strap 46 are inserted into the retainer 168 on both sides. The retainer 168 has angular knobs that can engage with the angular openings of the neck strap 46. In this way, the length of the neck strap 46 can be adjusted approximately according to the head size. Advantageously, the adjustment is achieved such that the protective helmet 30 can be conveniently put on when the tensioning unit 48 is not actuated. After the protective helmet 30 is worn, the neck strap 46 is then tensioned by means of the tensioning unit 48. The tensioning unit 48 is actuated by a latch lever 174. By actuating the latch lever 174, the support housing 172 provided with the decorative material piece 180 is guided to the rear head of the user 26 or away from the rear head of the user 26.

[0178] The helmet light 10 fixed to the helmet shell 36 in the front area of the helmet shell 36 can also be recognized as being located below the helmet shell 36. In addition, a battery holder 214 arranged on the outer side of the helmet shell 36 in the rear area can also be recognized, wherein only the upper retaining hook 218a and the lower retaining hook 222a of the retaining elements of the battery holder 214 are visible. In addition, the connecting cable 24 is indicated as being below the helmet shell, and the connecting cable 24 extends from the helmet light 10 to the battery pack 100 arranged in the battery holder 214, and the battery pack 100 is also not visible. For simplicity, the connecting cable 24 is not guided along the lower edge of the helmet along the inner side of the lower edge of the helmet shell 36, but laterally through the helmet shell 36 in the available free space and through an opening in the helmet shell 36 directly to the battery pack 100. This may be intentional because if the connecting cable 24 is not routed in this way, the connecting cable 24 extending close to the lower edge of the helmet shell 36 may easily interact with objects outside the helmet shell 36, and in particular, the connecting cable 24 may be pulled out of the intended position on the battery pack 100 by external objects. To avoid this, on the one hand, an adapted length of the connecting cable 24 is advantageous, and special recesses / openings can also be provided in the helmet shell 36 through which the connecting cable 24 can be guided to connect the helmet light 10 to the battery pack 100 in the battery holder 214.

[0179] ​Each shows a part of the graphical user interface for operating the helmet light. Separate views / representations of the part of the graphical user interface can be displayed, for example, on a separate display, which can be connected to the helmet light 10 in a wireless or wired manner. The various views of the graphical user interface are represented by way of example, in particular in English and in black and white. However, the observer is of course aware that different colors and / or languages can be selected here.

[0180] For example, the display showing the part of the graphical user interface in each figure can be part of a smartphone. Then, the smartphone can be connected to the helmet light in a cable-connected manner. For this purpose, for example, one of the plug connectors 3000, 3002 arranged on the helmet light 10 can be used. Of course, the smartphone connected to the helmet light 10 in a cable-connected manner can also serve as a power source for operating the helmet light 10, in particular, it can also supplement or replace the battery pack 100. It is also conceivable that the smartphone is used to charge the battery pack 100 like a power pack. The smartphone can also be connected to the helmet light 10 wirelessly, and for this purpose, the helmet light 10 can include a short-range communication interface, such as a Bluetooth interface.

[0181] Various functions of the helmet light 10 can be controlled via the smartphone, in particular via the graphical user interface presented on the smartphone. In addition, as ​ shown, the status information of the helmet light 10 can be presented. For example, the temperature of the helmet light 10 can be displayed, in particular the temperature of the controller board 18 or the temperature-sensitive element arranged on the controller board 18. Of course, the corresponding temperature of the controller board 18 or another part of the helmet light 10 can also be detected by a temperature sensor arranged on or elsewhere in the helmet light 10. In this regard, it is possible to turn off the automatic temperature control or reduce the power of the helmet light 10 in order to prevent damage to the helmet light. In addition, the temperature of the battery pack 100 can also be detected and presented. Similarly, the voltage provided by the battery pack 100, the current intensity provided by the battery pack 100, and the possible charging current can be detected and presented by the sensor elements to be provided correspondingly. In addition, the charging status of the one or more battery packs 100 electrically connected to the helmet light 10 can also be displayed. The status overview can also include information about which possible elements of the helmet light 10 and the additional elements connected thereto are currently active and the (adjustable) brightness of these elements. For example, ​The walking light (“Walking Light”), the helicopter light (“Helicopter Light”), and the battery light (“Battery Light”) are represented as 100%, which corresponds to the maximum possible light emission of the respective lighting element or lighting mode. On the other hand, the face light (“Face”) is shown as deactivated, while the work light (“Work Light”) is represented as partially enabled, i.e., having 80% of the maximum possible light emission. The corresponding status information can be presented in alphanumeric form or by means of different color scales or color intensities or as a bar graph. It is also conceivable, for example, to alternately display different status information of the helmet light 10 in order to improve readability, such that less information is reproduced on the same page, but for this purpose, this information is represented larger respectively.

[0182] The helmet light 10 can be operated, for example, by means of a touch-sensitive display, where additional information or functions can be enabled or invoked, for example, by touching one of the different elements represented in the figure. ​ and ​ represents some basic information about the helmet light 10, which is visually located within an application that can be installed on a smartphone. In particular, this application can be used to connect the smartphone to the helmet light 10 via a wireless connection (especially Bluetooth). For this purpose, the helmet light 10 can be first enabled via the switch 120. This enabling places the helmet light 10 at least in a standby mode, in which, for example, a connection to the smartphone can be established.

[0183] In ​ represents the initial screen of the user interface of the application in the (stationary) unconnected state, while ​ represents the same initial screen in the (successful) connected state.

[0184] On the one hand, in the upper region, the connection state to the helmet light 10 is characterized by hatched lines indicating the establishment of a connection, and this is simultaneously indicated in text form as “Connected”. In particular, ​ the hatched lines represented in ​ can indicate the prominent color design of the initial screen in the marked area. When a connection is established, the display can be changed accordingly. Additionally, in the lower region of ​ and ​In the lower area, it is further indicated that the user can recognize the full range of functions of the various lighting modes that can be provided by the helmet lamp 10 with the aid of one or more demonstration functions. These different demonstrations can, on the one hand, explain the various basic functions of the helmet lamp 10 to the user at the initial stage and, on the other hand, be used to check the unrestricted functions of the lighting modes to be provided, especially in the later usage stage when the user has gained sufficient experience in operating the helmet lamp 10. In a similar manner, additional ​ also visually and / or textually shows the different operating states of the helmet lamp 10 in different views of the graphical user interface of the corresponding representation of the application.

[0185] In particular, in ​ 、 ​ and ​ it is recognizable that the different possible lighting modes of the helmet lamp 10 are visualized with respect to the shadow light cone of the user indicated in a stylized form. Thus, ​ shows two light cones, where the lower light cone belongs to the walking light and the upper light cone belongs to the work light. ​ shows the light cone of the face light in the upper area of the user's head represented in a stylized form, as well as the light cone of the separate walking light in the lower area. ​ Subsequently, the light cone of the helicopter light is shown. Different light intensities between 0% and 100% can be selected independently or jointly for each individual lighting mode. In addition, a short-term "overclocking operation" can be provided, which is outside the normal operating specifications of the LED elements 1610 of the helmet lamp 10 used and can increase the light output of the LED elements 1610 operated in this way in a short time. This function can be selected, for example, by permanently pressing the "overclocking" touch surface represented in each figure. In addition, the temperature display of the helmet lamp 10 can also be visible, where the maximum allowable temperature can be set, for example, via the assigned operating element. Above this measured maximum temperature, the power of the helmet lamp 10 can be reduced. As can be recognized in the lower area of ​ the different lighting modes of the helmet lamp 10 can be switched in different ways, for example, pulsating lighting with a varying pulse duration. The lighting intensity can also be ramped up to avoid possible glare effects when the helmet lamp 10 is suddenly turned on. It is also conceivable that, in a similar manner, as the foreseeable depletion of the battery pack 100 occurs, the helmet lamp 10 fades out gradually with a time delay.

[0186] The features of the invention disclosed in the above description, the drawings and the claims, whether individually or in any combination, can be crucial for implementing the invention.

[0187] List of reference numerals

[0188] 10 Helmet lamp

[0189] 12 Cover

[0190] 14 Lens Unit

[0191] 16 Carrier Element

[0192] 18 Controller Board

[0193] 20 Cooler Element

[0194] 21 Cooling Rib

[0195] 22 Covering Element

[0196] 23 Screw

[0197] 24 Connecting Cable

[0198] 25 Recess

[0199] 26 User

[0200] 28 Additional Connecting Cable

[0201] 30 Protective Helmet

[0202] 32 Facial Protection Device

[0203] 34 Hearing Protection Device

[0204] 35a Hearing Protection Sac

[0205] 36 Helmet Shell

[0206] 37a Support Bracket

[0207] 40 Internal Fitting Assembly

[0208] 42 Support Cage

[0209] 44 Headband

[0210] 46 Neckband

[0211] 48 Tensioning Unit

[0212] 49 Bolt

[0213] 50 Ventilation Slide

[0214] 52 Opening

[0215] 53 Ventilation Opening

[0216] 54 Support Arm

[0217] 56 Front Edge

[0218] 58 Notch / Groove

[0219] 62 Reinforcing Rib

[0220] 64 Branch

[0221] 74 rod-shaped protrusions

[0222] 76 recesses

[0223] 80 fastening device - hearing protection device

[0224] 80a support point of hearing protection device

[0225] 84 fastening device - face protection device

[0226] 84a support point of face protection device

[0227] 85a cam

[0228] 92a bow spring

[0229] 100 battery pack

[0230] 102 display and operation element

[0231] 110 web

[0232] 112 front retaining claw

[0233] 114 front retaining claw

[0234] 116 rear retaining claw

[0235] 118 rear retaining claw

[0236] 120 switch

[0237] 122 retaining element

[0238] 124 anti-glare cover

[0239] 130 protective goggles

[0240] 132 face mask

[0241] 132a retaining arm

[0242] 136a plug

[0243] 168 retainer

[0244] 172 support housing

[0245] 174 latch lever

[0246] 180 decorative material part

[0247] 190 charging plug

[0248] 192 connector plug

[0249] 194 battery body

[0250] 196 sealing lip

[0251] 196a collar

[0252] 198 charging contact

[0253] 200 communication contact

[0254] 202 communication contact

[0255] 204 magnet

[0256] 206 charging contact

[0257] 208 sealing lip

[0258] 208a collar

[0259] 210 lateral stop lug

[0260] 212 stop lug

[0261] 214 battery holder

[0262] 216a upper retaining arm

[0263] 216b upper retaining arm

[0264] 218a upper retaining hook

[0265] 218b upper retaining hook

[0266] 220 frame

[0267] 222a lower retaining hook

[0268] 222b lower retaining hook

[0269] 223 step

[0270] 224 tab

[0271] 1104a magnet

[0272] 1104b magnet

[0273] 1106a PCB

[0274] 1106b PCB

[0275] 1106c PCB

[0276] 1106d PCB

[0277] 1108a electrical contact

[0278] 1108b electrical contact

[0279] 1110a casting composition

[0280] 1110b Casting Composition

[0281] 1112a Electrical Contact Surface

[0282] 1112b Electrical Contact Surface

[0283] 1112c Electrical Contact Surface

[0284] 1114a Recess

[0285] 1114b Recess

[0286] 1116a Protrusion

[0287] 1116b Protrusion

[0288] 1118 Battery Cell

[0289] 1120 Foil Cover

[0290] 1122 Cover

[0291] 1124 End Face

[0292] 1400a Fresnel Lens

[0293] 1400b Fresnel Lens

[0294] 1400c Fresnel Lens

[0295] 1402 Pointing Unit

[0296] 1602 Milling Portion

[0297] 1604 Hole

[0298] 1608 Conductor Trace

[0299] 1610 LED Component

[0300] 1612 Mechanical Switch Element

[0301] 1614 Additional Mechanical Switch Element

[0302] 1616 Frame

[0303] 1804 Bend Point

[0304] 1806 Hole

[0305] 2000 Temperature Display

[0306] 2002 Battery Charge Level Display

[0307] 2004 On / Off Button

[0308] 2006 LED Backlight

[0309] 2008 Display area

[0310] 3000 Plug connector

[0311] 3002 Connecting plug connector

[0312] 3002a Connecting member

[0313] 4000 Helicopter LED

[0314] 4002a Another helicopter LED

[0315] 4002b Another helicopter LED

[0316] 4004 Edge

Claims

1. A helmet light (10) for attachment to a protective helmet (30), wherein, The helmet lamp (10) includes a control controller and a sensor unit having a head recognition sensor, and wherein the helmet lamp (10) is capable of switching to a number of operating modes and operating states, - wherein the sensor unit is adapted to detect sensor data from the at least one head recognition sensor, process the sensor data and send the sensor data as processed head recognition sensor data to the control controller, - wherein the control controller is adapted to receive the processed head recognition sensor data and, based on the processed head recognition sensor data, switch the helmet lamp (10) between the number of operating modes and operating states.

2. The helmet light (10) according to claim 1, wherein, The head recognition sensor unit is arranged in the main body area of the helmet lamp (10).

3. The helmet lamp (10) according to claim 1 or 2, wherein, The head recognition sensor unit includes a position sensor which, as part of the head recognition sensor data, detects the spatial position of the helmet lamp (10), processes the spatial position and sends the spatial position to the control controller.

4. The helmet lamp (10) according to claim 3, wherein, The control controller is adapted to activate the work light of the helmet lamp (10) when the head recognition sensor data indicates that the helmet lamp is pointing towards the ground.

5. The helmet lamp (10) according to claim 3 or 4, wherein, The control controller is adapted to activate the high beam of the helmet lamp (10) when the head recognition sensor data indicates that the helmet lamp is pointing parallel to the ground or towards the sky.

6. The helmet lamp according to any one of the preceding claims, wherein, The head recognition sensor unit includes a distance sensor which, as part of the head recognition sensor data, detects distance data, processes the distance data and sends the distance data to the control controller.

7. The helmet lamp according to claim 6, wherein, The control controller is adapted to activate the work light or another light of the helmet lamp (10) when the head recognition sensor data indicates that the user is wearing the protective helmet.

8. A protective helmet (30) having a helmet lamp (10) according to any one of the preceding claims.

9. A method for operating a helmet light (10) that can be fastened to a protective helmet (30), wherein, The helmet lamp (10) includes a control controller and a sensor unit having a head recognition sensor unit, - wherein, by means of the sensor unit, sensor data from the at least one body temperature sensor is detected and processed and sent as processed head recognition sensor data to the control controller, - wherein, by means of the control controller, the processed head recognition sensor data is received and, based on the processed head recognition sensor data, the helmet lamp (10) is switched between the number of operating modes and operating states.

10. The method according to claim 9, wherein, When the head recognition sensor data indicates that the helmet lamp is pointing towards the ground, the work light of the helmet lamp (10) is activated by means of the control controller.

11. The method according to claim 8 or 9, wherein When the head recognition sensor data indicates that the helmet lamp is pointing parallel to the ground or towards the sky, the high beam of the helmet lamp (10) is activated by means of the control controller.

12. The method according to any one of claims 9-11, wherein, When the head recognition sensor data indicates that the user is wearing the protective helmet, the work light or another light of the helmet lamp (10) is activated by means of the control controller.

Images