DE102022134894A1 - Helmet light, protective helmet with a helmet light and a method for operating a helmet light - Google Patents

Abstract

The invention relates to a helmet light (10) for attachment to a protective helmet, wherein the helmet light (10) comprises a control controller and a sensor unit with a backlight sensor and wherein the helmet light (10) can be switched into a plurality of operating modes and states in each of which the helmet light (10) emits light, wherein the sensor unit is designed to capture sensor data from the backlight sensor, process it and send it to the control controller as processed backlight sensor data, wherein the control controller is designed to receive the processed backlight sensor data and to switch the helmet light (10) between the plurality of operating modes and states based on the processed backlight sensor data. The invention further relates to a protective helmet (30) with such a helmet light (10) and a method for operating such a helmet light (10).

Description

The present invention relates to a helmet light for attachment to a protective helmet, a protective helmet with such a helmet light and a method for operating such a helmet light.

For many jobs, especially in the forestry sector, wearing a protective helmet is necessary. A corresponding protective helmet, which has a helmet shell with an interior that includes a component that touches the head and consists of at least a carrying basket, a headband and a neckband, and means for attaching this component to the helmet shell, is known, for example, from the document DE 87 14 490 U1 known.

This well-known safety helmet is a basic helmet that can be adapted to different tasks in different operating conditions by changing add-on elements. The safety helmet consists of a helmet shell and a minimum of interior fittings. The interior fittings consist of a cross strap with which the helmet is worn on the head and which ensures an impact-resistant distance between the head and the helmet shell. The safety helmet has a projection on its outer circumference that encloses the side and rear parts of the helmet and contains four recesses on the lower edge for attaching the cross strap and further recesses for attaching additional add-on elements. The basic version of the helmet can be used as a simple universal helmet without any add-ons. The add-ons can be added or removed as required.

Helmet accessories that are useful to attach to a safety helmet include a helmet light that, similar to a headlamp, provides additional illumination of the work area of a safety helmet user or other areas. Such additional illumination of the work area or other areas can be useful not only at dawn and dusk or after dark, but also in areas shielded from daylight, such as the twilight under a closed treetop. A helmet light that can be attached to a safety helmet can also be advantageous for a wide variety of activities. For example, nighttime repairs to construction machinery on building sites or maintenance work in dark, poorly lit supply tunnels or under bridges can be carried out better and more efficiently if a suitable lighting device in the form of a helmet light is carried “on the person” and ready for use.

Such helmet lights usually generate light from electrical energy and must be carefully controlled in order to be able to control the various operating modes and states. It is particularly difficult to avoid blinding people who are in the vicinity of a protective helmet user and, for example, are working with them. Eye contact is also regularly sought, so that a beam of light emanating from the activated helmet light often hits and illuminates other people who also have a protective helmet with an activated helmet light and "light back" accordingly. As a result, both people then blind each other. This can only be avoided by at least turning the helmet light down in good time, i.e. emitting less light. However, this requires the full attention of the user and possibly also their hands. Work that actually needs to be done naturally suffers from the fact that a large part of the user's attention is permanently tied up by operating the helmet light.

The present invention is therefore based on the object of simplifying the operation of a helmet light.

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

In the helmet light according to the invention, it is provided that the helmet light comprises a control controller and a sensor unit with a backlight sensor, and wherein the helmet light can be switched into several operating modes and states in which the helmet light emits light, wherein the sensor unit is set up to capture sensor data from the backlight sensor, process it and send it to the control controller as processed backlight sensor data, wherein the control controller is set up to receive the processed backlight sensor data and to switch the helmet light between the several operating modes and states based on the processed backlight sensor data. This allows partial automation of the control of the helmet light. If the backlight sensor is directly hit by a light beam, i.e. the user is illuminated by another light source or another helmet light, it can be assumed that the helmet light also directly illuminates the user of the other helmet light and possibly blinds them. Accordingly, it is expedient to reduce the light output of the helmet light of the user of the protective helmet at least as long as the backlight sensor detects the directly incident light beam, preferably even for a few seconds longer. Useful embodiments and further developments emerge from the dependent claims.

Usefully, the backlight sensor can be arranged in the area of the lens unit and captures backlight sensor data essentially in an area in front of the lens unit. Due to the usual arrangement of the helmet light above the user's eye area, it can be assumed that detection of strong backlight in this area is also associated with a glare effect from the helmet light for the wearer of the light source from which the backlight emanates. This is at least reduced by the helmet light reducing its own light output when the backlight is detected.

Advantageously, it can be provided that the control controller is set up to switch the helmet light from an operating mode in which a high beam is active to another operating mode and/or another operating state in which a luminous range and/or intensity of the high beam is at least adjusted if it is detected based on the processed backlight sensor data that an incident backlight exceeds or falls below a threshold brightness. A reduction in the glare effect emanating from the helmet light is possible in particular by reducing the light rays reaching into the distance, for example the high beam, by switching them off, reducing the intensity or changing the direction of the light, so that more light is emitted towards the ground.

It can be provided that the control controller is set up to carry out the switching only if the incident backlight permanently exceeds or falls below the threshold brightness for a time interval Δt, whereby the time interval Δt is between 1 and 5 seconds, preferably between 2 and 3 seconds. In this way, it can be prevented that a light beam that only casually touches the helmet light and does not actually indicate blinding of an opposite person already triggers an adjustment of the operating mode or operating state of the helmet light.

Furthermore, it can be provided that several different threshold brightnesses are predefined or adjustable in the control controller, and that the control controller is set up to adjust the light range and/or intensity of the high beam when one of the several different threshold brightnesses is exceeded or not reached. In this way, sufficient illumination of an area in front of the user of the helmet light can be combined with a glare effect that is as negligible as possible for other oncoming users with their own light sources.

A protective helmet with such a helmet light is also described.

In the method according to the invention for operating a helmet light that can be attached to a protective helmet, it is provided that the helmet light comprises a control controller and a sensor unit with a backlight sensor, wherein, by the sensor unit, sensor data from the backlight sensor is recorded and processed and sent to the control controller as processed backlight sensor data, and wherein, by the control controller, the processed backlight sensor data is received and the helmet light is switched between several operating modes and states based on the processed backlight sensor data, in each of which the helmet light emits light. In this way, the advantages and special features of the helmet light according to the invention are also implemented within the framework of a method.

Usefully, it can be provided that, by the control controller, the helmet light is switched from an operating mode in which a high beam is active to another operating mode and/or another operating state in which a luminous range and/or intensity of the high beam is at least adjusted if, based on the processed backlight sensor data, it is detected that an incident backlight exceeds or falls below a threshold brightness.

Furthermore, it can be provided that the control controller only carries out the switching if the incident backlight permanently exceeds or falls below the threshold brightness for a time interval Δt, wherein the time interval Δt is between 1 and 5 seconds, preferably between 2 and 3 seconds.

It can also be provided that several different threshold brightnesses are predefined or set in the control controller, and that the control controller adjusts the luminous range and/or intensity of the high beam when one of the several different threshold brightnesses is exceeded or not reached.

Exemplary embodiments of the invention or some components and parts of the invention are described in more detail below with reference to the drawings.

• 1 zeigt eine dreidimensionale Ansicht eines Helmlichts;
• 2a bis 2f zeigen weitere dreidimensionale Ansichten eines Helmlichts aus verschiedenen Blickrichtungen;
• 3a zeigt eine dreidimensionale isometrische Ansicht eines Helmlichts in Explosionsdarstellung;
• 3b bis 3e zeigen ein Helmlicht teilweise aus verschiedenen Blickrichtungen;
• 4a und 4b zeigen eine Linseneinheit des Helmlichts von hinten und von vorne;
• 5a zeigt ein Controllerboard des Helmlichts;
• 5b und 5c zeigen ein Trägerelement des Helmlichts von oben und von hinten;
• 6a und 6b zeigen ein Controllerboard eines Helmlichts aus weiteren Blickrichtungen;
• 7a bis 7c zeigen einen Lüftungsschieber eines Schutzhelms aus verschiedenen Blickrichtungen;
• 8a bis 8j zeigen dreidimensionale Außenansichten eines Akkupacks aus verschiedenen Blickrichtungen und in verschiedenen Betriebszuständen;
• 9a bis 9c zeigen dreidimensionale Darstellungen eines Anschlusssteckers aus verschiedenen Blickrichtungen;
• 9d und 9e zeigen einen Innenaufbau eines Anschlusssteckers aus verschiedenen Blickrichtungen;
• 10a und 10b zeigen eine dreidimensionale Außenansicht eines Ladesteckers aus verschiedenen Blickrichtungen;
• 10c und 10d zeigen einen Innenaufbau eines Ladesteckers aus verschiedenen Blickrichtungen;
• 11a und 11b zeigen dreidimensionale Darstellungen eines Ladeanschlusses eines Akkupacks;
• 12a und 12b zeigen einen internen Aufbau eines Akkupacks aus verschiedenen Blickrichtungen;
• 13a bis 13h zeigen dreidimensionale Darstellungen einer Akkuhalterung aus verschiedenen Blickrichtungen;
• 14a bis 14e zeigen eine Helmschale mit einem Helmlicht aus verschiedenen Blickrichtungen;
• 15 zeigt eine dreidimensionale Ansicht einer Helmschale mit daran befestigtem Helmlicht von unten;
• 16a bis 16c zeigen Detailansichten von einer Helmschale mit daran befestigtem Helmlicht von unten;
• Figure 17a und 17b zeigen Detailansichten einer Helmschale mit daran befestigter Akkuhalterung aus verschiedenen Blickrichtungen;
• 18 zeigt eine Detailansicht einer Helmschale mit daran befestigter Akkuhalterung und eingeschobenem Akkupack;
• 19 bis 21 zeigen Frontalansichten eines Schutzhelms mit daran befestigtem Helmlicht von vorne;
• 22 zeigt eine Detailansicht eines Schutzhelms mit daran befestigtem Helmlicht von schräg oben;
• 23a zeigt eine seitliche Schnittansicht durch einen Schutzhelm mit daran befestigtem Helmlicht;
• 23b zeigt eine weitere seitliche Schnittansicht eines Schutzhelms mit daran befestigtem Helmlicht;
• 24 zeigt eine seitliche Explosionsdarstellung eines Schutzhelms mit verschiedenen Zubehörteilen; und
• 25a bis 25i zeigen Teile einer graphischen Benutzeroberfläche zur Bedienung eines Helmlichts.

Show it:

• 1 shows a three-dimensional view of a helmet light;
• 2a to 2f show further three-dimensional views of a helmet light from different viewing directions;
• 3a shows a three-dimensional isometric view of a helmet light in exploded view;
• 3b to 3e show a helmet light partly from different viewing directions;
• 4a and 4b show a lens unit of the helmet light from behind and from the front;
• 5a shows a controller board of the helmet light;
• 5b and 5c show a support element of the helmet light from above and from behind;
• 6a and 6b show a controller board of a helmet light from other viewing directions;
• 7a to 7c show a ventilation slide of a protective helmet from different viewing directions;
• 8a to 8j show three-dimensional external views of a battery pack from different viewing directions and in different operating states;
• 9a to 9c show three-dimensional representations of a connector plug from different viewing directions;
• 9d and 9e show an internal structure of a connector plug from different viewing directions;
• 10a and 10b show a three-dimensional external view of a charging plug from different angles;
• 10c and 10d show the internal structure of a charging plug from different perspectives;
• 11a and 11b show three-dimensional representations of a charging port of a battery pack;
• 12a and 12b show the internal structure of a battery pack from different perspectives;
• 13a to 13h show three-dimensional representations of a battery holder from different viewing directions;
• 14a to 14e show a helmet shell with a helmet light from different viewing directions;
• 15 shows a three-dimensional view of a helmet shell with a helmet light attached from below;
• 16a to 16c show detailed views of a helmet shell with a helmet light attached from below;
• Figures 17a and 17b show detailed views of a helmet shell with attached battery holder from different viewing directions;
• 18 shows a detailed view of a helmet shell with attached battery holder and inserted battery pack;
• 19 to 21 show frontal views of a protective helmet with a helmet light attached;
• 22 shows a detailed view of a protective helmet with a helmet light attached to it from above;
• 23a shows a side sectional view through a protective helmet with a helmet light attached;
• 23b shows another side sectional view of a protective helmet with a helmet light attached;
• 24 shows a side exploded view of a protective helmet with various accessories; and
• 25a to 25i show parts of a graphical user interface for operating a helmet light.

In the following description of the drawings, identical reference symbols refer to identical or comparable components.

The 1 and 2a to 2f show three-dimensional views of a helmet light from different directions. A helmet light 10 shown in each case comprises a lens unit 14 with a glare protection 124 arranged thereon and a main body, of which at least parts of a cooler element 20 and a cover element 22 can be seen in the figures. The cooler element 20 and the cover element 22 can, for example, as in 1 recognizable, be arranged on opposite sides of the main body of the helmet light 10 and be fastened to one another, for example, by screws 23, each of which extends through the main body. An additional or exclusive gluing, instead of screw fastening, of the cooler element 20 and/or the cover element 22 is also possible. Other alternative fastening options are also conceivable, for example the use of a fastening element for the cooler element 20 and/or the cover element 22 that cannot be removed without causing damage, by which, for example, the helmet light 10 can be easily repaired, manipulation of the electronics of the helmet light 10 can be traced based on the then damaged fastening element. The cover element 22 can consist of one or more parts that are firmly or loosely connected to one another. In the example shown, the cover element 22 consists of a single part.

At the 1 In the three-dimensional view shown, the cooler element 20 is located on the side of the helmet light 10 facing away from the viewer and is largely covered by the cover element 22, which is why, in order to clarify the connection between the cooler element 20 and the cover element 22 and also to give the viewer an idea of the shape of the main body of the helmet light 10, 1 hidden areas of the cooler element 20 are shown in dashed lines. The helmet light 10 has a plug connection 3000 and a connector plug connection 3002 on opposite side end areas. The plug connection 3000 can be, for example, a USB connection, in particular a USB type C connection. Instead of the arrangement of the two aforementioned plug connections shown in the figures, a common arrangement on a single side of the helmet light 10 is also conceivable. The arrangement on opposite sides of the helmet light 10 has certain advantages with regard to cable routing, however, since the available space for mounting the helmet light 10 is limited, as will be explained below. In 1 In addition to the plug connection 3000, a connection connection 3002a is shown, which can be provided in addition to or as an alternative, in particular to the connection plug connection 3002, as required. The connection connection 3002a is located in 1 for example on the same side of the helmet light 10 on which the plug connection 3000 is also provided. The connection connection 3002a is coupled directly to the main body of the helmet light 10 and, for example, is soldered firmly to a controller board 18 associated with the main body of the helmet light 10. The connection plug connection 3002 and/or the connection connection 3002a can be used, for example, to connect accessories to the helmet light 10. Accessories for the helmet light 10 can, for example, be further light elements that can be freely positioned or fixed to a helmet shell 36, for example light elements that form a "helicopter LED", which is described in more detail below. Additional light elements that can be attached to the edge of the helmet shell in order to provide face lighting are also conceivable. Such facial lighting can be particularly advantageous during a rescue operation, as the protective helmet usually leaves the face of the user/wearer in shadow, so that an already frightened person could potentially panic if he or she cannot see the user of the protective helmet approaching him or her or cannot recognize him or her as a normal person, and inadvertently hinder the rescue/recovery.

The plug connection 3000 and the connecting plug connection 3002 can each, just like the connecting connection 3002a, be mounted on a circuit board carrying further electrical components of the helmet light 10, which is described in more detail below in the form of the controller board 18 by way of example.

In the figures, the lens unit 14 is regularly surrounded by the glare protection 124, which prevents or at least reduces unwanted escape of scattered light from the lens unit 14. In this way, for example, wearing the helmet light 10 in the activated state can be made more comfortable for a user, since light emerging from the lens unit 14 does not reach the user's eyes directly. The glare protection 124 can be made of rubber, plastic, GRP, a metal sheet, or a similar mechanically insensitive material that is impenetrable to visible light. The glare protection 124 can be removably fixed to the lens unit 14, for example by means of a clamping effect. In this way, for example, the glare protection 124 can be replaced in the event of damage. In this way, it is also possible to adapt the glare protection 124 used to an glare protection 124 adapted to the respective intended use. It is conceivable, for example, that the glare protection 124 is provided with an additional, partially translucent element in the direction of radiation of the lens unit 14 in a manner not shown in order to modify a radiation characteristic/light intensity of the helmet light 10. The glare protection 124 can alternatively also be firmly and permanently connected to the helmet light 10, for example by gluing or a locking mechanism that cannot be removed without causing damage.

The helmet light 10 can, as already indicated, also have a 1 not shown separately. With the help of this face lighting unit, an illumination of a facial area can be achieved by specially oriented lighting elements, which can be arranged separately from a "helmet light body" containing the helmet light 10 in a face lighting unit. This face lighting unit can then be firmly positioned on an inner edge of a protective helmet, similar to the actual helmet light 10. It is also possible for the face lighting unit to be integrated directly into the helmet light 10. For example, the special lighting elements on the back of the lens unit 14 can be arranged such that they emit diffuse light past the glare protection 124 onto the user's face.

In 1 Furthermore, a connection cable 24 can be seen on the plug connection 3000, which ends at the end of the connection cable 24 opposite the plug connection 3000 in a connection plug 192, which is also described in more detail below.

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

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

In 2a the helmet light 10 is shown three-dimensionally from above, so that in addition to the lens unit 14 with the glare protection 124, the connector plug connection 3002 on the left side and the connector plug connection 3000 on the right side, in particular details of the cover element 22 can be seen. The cover element 22 has various elements which are used in particular for the detachable fixation of the helmet light 10 to the helmet shell 36 described in more detail below. To mount the helmet light 10, the cover element 22 comprises at least four fastening points. Shown in 2a on the left side, a rear retaining claw 116, a front retaining claw 112 and a retaining element 122. In a symmetrical manner, the cover element 22 comprises on the 2a The side shown on the right also has a rear retaining claw 118, a front retaining claw 114 and a retaining element 122. Overall, the cover element 22 in the example thus comprises six fastening points, although more or fewer fastening points can also be provided as long as at least four fastening points are provided. The function of the front retaining claws 112, 114, the retaining elements 122 and the rear retaining claws 116, 118 is described in more detail below. The cover element 22 can be made of similar materials as the glare protection 124, whereby the cover element 22 is preferably made of an electrically insulating material, although this is not absolutely necessary. In 2a A centrally located on/off switch can be seen, which is not specifically identified, and can be used, for example, to switch the helmet light 10 on/off. Since this on/off switch is hardly accessible when the helmet light 10 is mounted on the helmet shell 36, this on/off switch can be considered optional, for example to access basic functions of the helmet light 10 when the helmet light 10 is held in the hand by a user and is not mounted on the helmet shell 36.

This is particularly true in 2 B The easily visible cooler element 20 faces away from the helmet shell 36 when the helmet light 10 is mounted and points towards the interior of the helmet. The cooler element 20 is provided with cooling fins 21 which improve heat dissipation and can dissipate heat that is generated when the helmet light 10 is in operation in order to prevent the helmet light 10 from overheating. A switch 120 is provided in the middle of the cooler element 20, which can also be used to easily switch the helmet light 10 on/off when the helmet light 10 is mounted. By operating the switch 120, the helmet light 10 can be switched from a completely switched off state into a type of standby mode in which the helmet light 10 does not emit any light but can only be controlled using external control elements. This can be seen as a standby state in which as little energy as possible is consumed, but at the same time flexible control of the helmet light 10 is possible at any time. It is conceivable that when the switch 120 is actuated, for example, an optical and/or acoustic signal can be given, which signals to the user that the helmet light 10 is ready for use or that it is switched off.

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

The lens unit 14 is provided with 2e several individual, separate round lenses are indicated, which essentially serve for the directed light emission of the helmet light 10. The internal structure of the lens unit 14 with the lenses indicated here will be described below in the 4a and 4b explained.

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

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

The control controller can, for example, be configured to receive a detected housing operating temperature value and to change an operating state of the helmet light based on the received housing operating temperature value. For example, the control controller can be configured to reduce the light output of the helmet light 10 if the detected housing operating temperature value of the helmet light 10 exceeds a tolerable temperature threshold value T _{tol_max} . A reduction in the light output automatically means a reduction in the waste heat generated and thus a long-term reduction in the housing operating temperature value. This can, for example, prevent the flammable material from igniting in an explosive environment (flammable gases or dust in the air). The control controller can also be configured to switch off the helmet light 10 after issuing a warning signal if the detected housing operating temperature value of the helmet light exceeds an upper temperature threshold value T _max . This may be necessary if, despite previously taken measures, a reduction in temperature could not be achieved and a further increase in temperature entails the immediate risk that the housing of the helmet light 10 will act as an "ignition spark" and could, for example, cause a dust or gas explosion. The control controller can also be set up to slowly bring the switched-off helmet light 10 into a selected operating state during a time interval Δt that is longer than the switch-on interval actually required to switch on the light-emitting elements if the detected housing operating temperature value of the helmet light falls below a lower temperature threshold value T _{light_min} . This measure reduces the local heat generated on the light elements at very low temperatures. The resulting waste heat is limited. This also reduces the temperature gradients that arise. In this way, fewer temperature-induced voltages are generated at the soldering points and/or the circuit board, which could impair the functionality of the helmet light 10. Furthermore, the control controller can be set up to continuously increase the actual light output of the helmet light 10 during the time interval Δt up to the light output desired in the selected operating mode. This also serves, for example, to reduce temperature gradients within the helmet light 10.

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

The infrared sensor can be arranged on the controller board 18, for example near the LED elements 1610. The infrared sensor is thus then arranged in the area of the lens unit 14 and thereby records sensor data essentially in an area in front of the lens unit 14. This enables the control panel to be restricted/defined so that unintentional activation of the helmet light 10 can be avoided. The sensor unit can also comprise an ultrasonic sensor, which can be arranged on the controller board 18 in a similar way to the infrared sensor near the LED elements 1610. The advantages described in connection with the infrared sensor can also be realized with the aid of the ultrasonic sensor in an analogous procedure. The ultrasonic sensor can therefore also be arranged in the area of the lens unit 14 and record sensor data essentially in an area in front of the lens unit 14. This again enables the control panel to be restricted/defined so that unintentional activation of the helmet light 10 can be avoided. The ultrasonic sensor may also be suitable for enabling operation by a user wearing special heat-insulating protective clothing. Switching can therefore occur, for example, when a predefined arm gesture of a user wearing the protective helmet 30 is detected in the processed additional sensor data of the ultrasonic sensor. Instead of or in addition to the infrared and/or ultrasonic sensor, the sensor unit can also comprise a twilight sensor. The sensor unit can then be set up to record sensor data from the twilight sensor, process it and send it to the control controller as processed twilight data. The control controller can in turn be set up to receive the processed twilight data and to switch the helmet light 10 between the multiple operating modes and states based on the processed twilight data, in particular to switch it on when insufficient brightness is detected in the processed twilight data in front of the helmet light 10. This enables partial automation of the operation of the helmet light 10, in particular automated switching on. By arranging the twilight sensor in the area of the lens unit 14, sensor data is essentially recorded in an area in front of the lens unit 14, in particular in a work area. This makes it possible to restrict automatic operation in such a way that the helmet light 10 is only automatically activated, in particular switched on, when insufficient brightness is detected in the area in front of the helmet light 10.

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

In order to reduce the glare emanating from the helmet light 10, the control controller can be set up to switch the helmet light 10 from an operating mode in which a high beam is active to an operating mode or operating state in which a luminous range and/or intensity of the high beam is at least adjusted if it is detected based on the processed backlight sensor data that an incident backlight exceeds or falls below a threshold brightness. A reduction in the glare emanating from the helmet light 10 is possible in particular by reducing the light rays reaching into the distance, for example the high beam, by switching them off, reducing the intensity or changing the direction of the light so that the light is directed more towards the ground. The control controller can then be set up to only carry out the switching if the incident backlight permanently exceeds or falls below the threshold brightness for a time interval Δt, wherein the time interval Δt is between 1 and 5 seconds, preferably between 2 and 3 seconds. In this way, it can be prevented that a light beam that only casually touches the helmet light 10, which does not indicate a real, continuous glare of an opposite person, triggers an adjustment of the operating mode or operating state of the helmet light 10. Several different threshold brightnesses can also be predefined or set in the control controller. The control controller is then set up to adjust the light range and/or intensity of the high beam when one of the several different threshold brightnesses is exceeded or not reached. In this way, sufficient illumination of an area in front of the user of the helmet light 10 can be combined with a glare effect that is as negligible as possible for other oncoming users with their own light sources. Instead of oncoming users with their own light sources, a direction in which other users are located can also be determined with the help of passive light sources, for example reflectors or similar, and/or position beacons that are worn by the other users. The term "user" is to be interpreted very broadly here and includes in particular animals, for example dogs, especially working dogs, which, for example, assist in a tracking operation or more generally in a search in poor visibility conditions and which could possibly be distracted by strong, dazzling light sources during this search or tracking operation.

If the sensor unit comprises a gas sensor, the sensor unit can be configured to capture sensor data from the at least one gas sensor, process it, and send it to the control controller as processed gas sensor data. The control controller can in turn be configured to receive the processed gas sensor data and to switch the helmet light 10 between the multiple operating modes and states based on the processed gas sensor data. By having the helmet light 10 detect dangerous vapors via the gas sensor, at least one warning can be given to the user, so that the problem of unknowingly staying in an area contaminated by dangerous vapors is avoided. The gas sensor(s) can be arranged in the area of a main body of the helmet light 10. There is sufficient protected space on the main body of the helmet light 10 for this purpose, which can be used to arrange the gas sensor(s). Other positionings, for example on the ventilation slide, are also possible. The sensor unit can be set up, with the aid of the gas sensor, for example, to detect a concentration of CO ₂ and/or CO. These gases are colorless and odorless and are particularly suitable for endangering the health of a user in an area contaminated with these gases in increased concentrations. The control controller can then be set up to switch the helmet light 10 to an operating state in which a warning signal is issued if the processed gas sensor data show a concentration of CO ₂ and/or CO that is above a gas threshold concentration. The warning signal can be issued acoustically and/or optically. An acoustic output can be issued, for example, via a loudspeaker that can be coupled to the helmet light 10. The loudspeaker can, for example, be part of an input device that can be coupled to the helmet light 10. An optical output can, for example, mean adjusting the color of light emitted by the helmet light 10. For example, the helmet light 10 can emit a red light or use it to illuminate the work area to indicate the danger. By confronting the user with the warning signal, he or she is given the opportunity to take measures to protect himself or herself, such as leaving the endangered area. The sensor unit can also be set up to detect a concentration of a flammable gas via the gas sensor(s). Flammable gases can be ignited, for example, by the helmet light 10 itself or by a tool operated by the user. In this context, too, it can be provided that the control controller is set up to switch the helmet light 10 to an operating state in which at least one warning signal is issued if the processed gas sensor data show a concentration of the flammable gas that is above a gas threshold concentration. The warning signal can again be issued acoustically and/or visually. By confronting the user with the warning signal, he is given the opportunity to take measures to protect himself, for example to leave the endangered area. Due to the risk of fire or explosion, it can also be provided to deactivate the helmet light 10 after the warning signal or at least to reduce the light output. This can prevent an explosion or deflagration, since the heating of the helmet light 10 and the associated battery pack 100 may already be sufficient to cause an ignition/explosion.

If the sensor unit comprises an acceleration sensor, the sensor unit can be configured to capture sensor data from the at least one acceleration sensor, process it and send it to the control controller as processed acceleration sensor data. The control controller can in turn be configured to receive the processed acceleration sensor data and to switch the helmet light 10 between several operating modes and states based on the processed acceleration sensor data. A change in a movement trajectory of the user can be detected in the data from the acceleration sensor, so that, for example, a fall of the user can be detected by the control controller with the aid of the sensor unit. The control controller can then take the appropriate measures. The at least one acceleration sensor can be arranged in particular in the region of a main body of the helmet light 10. However, other positionings, for example on the ventilation slide 50, are also possible. The main body of the helmet light 10 is protected below the helmet shell, so that conclusions can be drawn in particular about the head movement of the user based on the change in the movement trajectory. This is particularly advantageous for detecting a fall in the acceleration data. The sensor unit or acceleration sensor can detect acceleration in three directions that are not parallel to each other. This provides the most flexible data acquisition possible, allowing the detection of falls in any direction, for example.

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

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

If the sensor unit comprises a possibly contactless body temperature sensor, the sensor unit can be set up to record sensor data from the at least one body temperature sensor, process it and send it to the control controller as processed body temperature sensor data. The control controller can in turn be set up to receive the processed body temperature sensor data and to switch the helmet light 10 between the multiple operating modes and states based on the processed body temperature sensor data. The body temperature sensor, or in the data recorded by it, can in particular detect overheating or hypothermia of the user, which increases the user's safety, since the user cannot always detect these states in time. By switching the helmet light 10, the user can be informed of his condition, which potentially endangers his own health. The switching can in particular also include switching on the helmet light 10. The at least one body temperature sensor can be arranged in the area of a main body of the helmet light 10. The main body of the helmet light 10 provides a protected installation space. In particular, the sensor unit can detect a body temperature on a user's head when the user is wearing the protective helmet 30. From the main body, the body temperature sensor can perform direct temperature monitoring/measurement on the user's head, which allows a good assessment of the user's general condition. Alternatively, it is also possible to provide a body temperature sensor in the manner of a heart rate belt directly on the user's body and to connect it to the helmet light 10, for example using a short-range radio interface. The control controller can then be set up to issue a warning signal when the processed body temperature sensor data exceeds a predetermined body temperature threshold value t _max . If this threshold value is exceeded, it can be concluded that the user is (impending) overheating. The warning signal can be issued optically, for example by changing the light output of the helmet light 10, or acoustically, for example via a loudspeaker that is provided. If it is clear from the recorded body temperature sensor data that the user has suffered heat stroke and needs help (there is significant overheating or the recorded body temperature continues to rise after the warning signal is issued, whereby other sensor data can also be taken into account), the helmet light 10 can also be provided to issue an emergency signal, as previously described in connection with a fall. The control controller can also be set up to issue a warning signal if the processed body temperature sensor data falls below a predetermined body temperature threshold value t _min . If this threshold value is undershot, it can be concluded that the user is (impending) hypothermia. The warning signal can be issued optically, for example by changing the light output of the helmet light 10, or acoustically, for example via a loudspeaker provided. If it is apparent from the recorded body temperature sensor data that the user is already severely hypothermic and needs help (significant hypothermia is present or the recorded body temperature continues to drop after the warning signal is issued, whereby other sensor data can also be taken into account), the helmet light 10 can also be provided to emit an emergency signal, as previously described in connection with a fall.

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

The helmet light 10 can comprise a fan unit and the control controller can in this case be set up to switch the fan unit on or off when the processed humidity sensor data exceeds or falls below a predetermined humidity threshold. Activating the fan unit associated with the helmet light 10 can generate an air flow, in particular under the helmet shell 36 of the protective helmet 30, in order to better remove any film of sweat that may be present, which increases the wearing comfort of the protective helmet 30 and lowers the body temperature of the user. The fan unit can, for example, be attached to the main body of the helmet light 10. or be arranged on the lower edge of the helmet shell 36. The fan unit is not shown in the figures, but it is obvious to a person skilled in the art how it must be designed so that it can generate an air flow below the helmet shell 36. The fan unit can alternatively be arranged on or in the ventilation slide 50 and suck or blow the air flow through the ventilation openings 53 provided there. 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 up to issue a warning signal if the processed humidity sensor data exceeds a predetermined humidity warning threshold. In this "warning level" the user can be informed that the humidity in the ambient air may soon reach a problematic level.

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

The head detection sensor can comprise a position sensor which, as part of the head detection sensor data, detects a spatial position of the helmet light 10, processes it and sends it to the control controller. By detecting the spatial position of the helmet light 10, a rough conclusion can be drawn as to whether the user is wearing the protective helmet 30 at all or what he is doing. For example, the user will hold the helmet light 10 essentially "horizontally" most of the time when standing. The control controller can then be set up to activate a work light of the helmet light 10 if the head detection sensor data shows that the helmet light 10 is pointing towards the ground. If the user tilts his head forwards, starting from a "horizontal orientation" of the helmet light 10 when looking straight ahead, in order to perform an activity directly in front of him, the helmet light 10 is also tilted forwards, so that activating the work light of the helmet light 10 is sensible and can be done automatically by the control controller. In an analogous manner, the control controller can also be set up to activate a high beam of the helmet light 10 if the head detection sensor data shows that the helmet light 10 is parallel to the ground or the sky. The head detection sensor can also comprise a distance sensor that records distance data as part of the head detection sensor data, processes it and sends it to the control controller. The distance data can be recorded in particular within the helmet shell. In this context, the control controller can be set up to activate a work light or another light of the helmet light 10 if the head detection sensor data shows that the user is wearing the protective helmet 30. This also contributes to a sensible automation of the control of the helmet light 10.

If the sensor unit comprises a housing temperature sensor that detects a housing operating temperature value of the helmet light 10, the control controller can be configured to receive the detected housing operating temperature value and to change an operating state of the helmet light 10 based on the received housing operating temperature value. This can, for example, limit the heat development of the helmet light 10 in order to influence the detected housing operating temperature in a desired manner, in particular to limit it upwards. The control controller can, for example, be configured to reduce a light output of the helmet light 10 if the detected housing operating temperature value of the helmet light 10 exceeds a tolerable temperature threshold value T _{tol_max} . As a result, less electrical energy is converted into light, so that less waste heat is generated, which increases the housing temperature. As a further example, it should be noted that the control controller can be configured to switch off the helmet light 10 after issuing a warning signal if the detected housing operating temperature value of the helmet light 10 exceeds an upper temperature threshold value T _max . This approach can directly contribute to preventing an explosion by presetting the temperature threshold below an “ignition temperature”, for example at 40° C. Depending on the gas and dust particles expected in the ambient air, the temperature threshold can be set differently in order to comply with legal Explosion protection requirements are to be met safely. The warning signal can again be issued optically or acoustically, for example, as already described above. The control controller can also be set up to switch the switched off helmet light 10 to a selected operating mode during a time interval Δt if the detected housing operating temperature of the helmet light 10 falls below a lower temperature threshold value T _{light_min} . The slow heating avoids thermal stresses within the helmet light 10, in particular on the controller board and the soldering points located thereon. In addition, the control controller can be set up to continuously increase the actual light output of the helmet light 10 during the time interval Δt until the light output is reached in the selected operating mode. Since cracks are more likely to form at very low temperatures than at higher temperatures, it is expedient to generate a smaller amount of waste heat at the beginning of the respective operating cycle when the helmet light 10 is still comparatively cold. Likewise, it is again possible for the helmet light 10 to comprise a battery pack 100 with a temperature sensor that detects a battery pack operating temperature of the battery pack 100, wherein the helmet light 10 comprises a control controller that is configured to receive the detected temperature value and to change an operating state of the helmet light 10 based on the received battery pack operating temperature value. In this way, the control controller can take suitable measures to keep the battery pack 100 within a tolerable temperature range, as already explained above. The control controller can also be configured to activate an electrical heating unit arranged in a battery body 194 as long as the detected battery pack operating temperature value of the battery pack 100 falls below a lower temperature threshold value T _{battery_min} . In this way, the discharge cycle of the battery pack 100 can take place with the otherwise usual parameters. The control controller can also be set up to reduce the light output of the helmet light 10 if the detected battery pack operating temperature value of the battery pack 100 exceeds a tolerable temperature threshold value T _{battery_max} . By reducing the light output, i.e. reducing the brightness of the helmet light 10, the electrical power taken from the battery pack 100 is reduced, which immediately reduces the waste heat generated, so that the temperature of the battery pack 100 can drop, assuming a constant rate of release of the waste heat to the environment. This can be advantageous, for example, in an environment at risk of explosion.

The actions of the various sensors, the sensor unit comprising these sensors and the control controller described above can also be viewed as a method carried out by these various elements of the helmet light 10. Furthermore, it is possible to adapt the behavior of the helmet light 10 to different purposes, for example by "reprogramming" individual or all threshold values, changing/adapting the recognized gestures/arm movements and the functions triggered thereby, etc.

The controller board 18 is mainly arranged in the area of the main body of the helmet light 10, but protrudes in its 3a forward-facing edge area beyond the main body. The controller board 18 is supported by a carrier element 16 in a planar, in particular completely, manner in order to ensure sufficient mechanical stability of the controller board 18. As shown in 3a As can be seen, the edge regions of the controller board 18 and the carrier element 16 can be angled relative to their central regions, wherein the angled regions of the controller board 18 on the side, for example, 2a to 2f already known connector 3000 and the connector connector 3002, which are in the 3a and 3b are not shown for the sake of simplicity. The controller board 18 and the carrier element 16 are composed in the 3a forwards in the direction of the lens unit 14, and thus connects this to the main body of the helmet light 10. The controller board 18 can, for example, carry LED elements 1610 that generate visible light, which are connected to a corresponding energy source via electrical connecting lines on the controller board 18. The lens unit 14 comprises several lens elements that are not provided with separate reference numerals. Each of these lens elements can be assigned to one or more light-generating LED elements 1610 on the controller board 18. The lens elements bundle and focus the light emanating from the LED elements 1610 in the desired radiation direction. A cover 12 can also be seen in front of the lens unit 14, which can, for example, be designed to be replaceable. The cover 12 essentially serves to protect the lens unit 14, the individual lens elements of which are sensitive to mechanical damage, in particular scratches.

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

The 3b shows a three-dimensional representation of parts of a helmet light 10 from below. 3b in particular the cooler element 20 with its heat-dissipating cooling fins 21 and the further stiffening circumferential bead. Furthermore, the centrally arranged switch 120 is also visible again. In the front area of the 3b A recess 25 is also provided on the cooler element 20, which is located in the area of the connector plug 3000 to be arranged there on the controller board 18, in order to protect it from excessive mechanical stress. On the opposite side, a corresponding recess on the cooler element 20 is not visible, but can nevertheless also be provided for the connector plug connection 3002 to be arranged there.

The cooler element 20 is connected in a flat manner to the carrier element 16 which it covers, so that heat generated during operation of the helmet light 10 from the controller board 18 passes through the carrier element 16, which is designed as a good heat conductor, to the cooler element 20 and is dissipated from there into the environment.

3c shows another three-dimensional representation of parts of a helmet light 10 from above. 3c In the selected representation, only the controller board 18, the carrier element 16 arranged underneath and the cover 12 are visible. The cover 12 in turn covers the lens unit 14 which is usually arranged underneath and which in turn covers LED elements 1610 on the controller board 18. In the central area of the controller board 18, through holes (not shown in more detail) can also be seen, through which the cooler element 20 can be screwed to the cover element 22 when the helmet light 10 is installed. The through holes therefore also extend through the carrier element 16.

3d shows further components of a helmet light 10 three-dimensionally from above. 3c is in 3d In addition, the cover element 22 is shown arranged on the controller board 18. The 3d The visible upper side of the cover element 22 with the on/off switch (not further designated) faces the helmet shell 36 when the helmet light 10 is mounted.

3e shows components of the helmet light 10 three-dimensionally from below. 3e selected viewing angle, the cover element 22 lies on the underside of the helmet light 10, which faces away from the viewer, and the cover element 22 is therefore only partially visible. Furthermore, the cooler element 20 has not been shown, so that the carrier element 16 underneath is now visible. The controller board 18 is largely covered by the carrier element 16, so that only some edges of the controller board 18 are visible. The plug connection 3000 and the connecting plug connection 3002 are also shown on the laterally angled areas of the controller board 18. The through holes in the controller board 18 and their continuation in the carrier element 16 are also visible. In addition, from this viewing angle, further through holes in the front angled area can now be seen, which also serve assembly purposes. In addition, the switch 120 is again visible centrally on the carrier element 16, which now rests directly on the carrier element 16 and, if the cooler element 20 is mounted, is framed by it in a "crescent-like" manner. The switch 120 can in particular be designed in the form of a foil switch, with foil-like connecting lines being led around an edge of the carrier element 16 and connecting the switch to corresponding connections on the controller board 18.

4a shows a lens unit 14 of the helmet light 10 from behind and 4b the lens unit 14 of the helmet light 10 from the front. The lens unit 14 has a number of directing units 1402 arranged next to one another. 7 individual directing units 1402 arranged next to one another are shown. The respective directing units 1402 serve to guide the light within the lens unit 14. The directing units 1402 are designed in the shape of a truncated cone, with each of the directing units 1402 being assigned to a separate LED element 1610 and guiding light emitted by the LED element 1610 from the back to the front through the lens unit 14, with as little stray light to the side as possible being desired. This can be realized or at least supported in particular by the truncated cone-shaped design of the directing units 1402, with light emitted by the respective LED elements 1610 being refracted back into the truncated cone by the natural refraction of the beam at the boundary areas between the directing unit and the free space in between. An additional reflective coating of the truncated cone surfaces is conceivable and can be provided if required. The light emerging from the front of the lens unit 14 at the respective directing units 1402 first reaches the area of various Fresnel lenses 1400a, 1400b and 1400c, whereby each of the directing units 1402 forms a pair with one of the Fresnel lenses 1400a, 1400b and 1400c and flows into them. The various Fresnel lenses 1400a, 1400b and 1400c are designed differently. tet, wherein the three centrally arranged Fresnel lenses 1400c each have different main radiation directions from the pairs of Fresnel lenses 1400b and 1400a arranged further out. It is of course possible to design the lens unit 14 with more or fewer pairs of directional units 1402 and Fresnel lenses 1400a, 1400b and 1400c. Furthermore, the intended main radiation directions of the individual Fresnel lenses 1400a, 1400b and 1400c can also be designed as required. For example, the different main beam directions of the Fresnel lenses 1400a, 1400b and 1400c can be designed such that the Fresnel lenses 1400a are outer work light lenses, the Fresnel lenses 1400b are inner work light lenses and the Fresnel lenses 1400c are front light or high beam lenses. The lens element 14 can, for example, be designed as an injection-molded part made of transparent plastic with suitable light refraction properties. Individual Fresnel lenses 1400a, 1400b, 1400c can in particular also have the function of a diffuser.

The various Fresnel lenses 1400a, 1400b, 1400c are used in the various operating modes of the helmet light 10 in different combinations to emit light in order to illuminate the light cones desired for the respective operating mode for illuminating the different spatial areas, in particular the work area, the close area and the long-distance area, around the helmet light 10.

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

The close area that adjoins the work area in the distance can, for example, partially overlap with the work area and be illuminated in particular when the user wearing the protective helmet 30 is walking. The core area of the illuminated close area, i.e. the light cone(s) emanating from the helmet light 10 that directly illuminates an area, can, for example, start about 2 m in front of the user and end about 6 m in front of the user, assuming a height of the protective helmet worn by the user of 1.8 m and an orientation of the protective helmet 30 "parallel" to the ground. A lateral opening angle, starting from the helmet light 10, of the core area of the illuminated close area can be about 120°, so that to the right and left an area that is slightly less wide than the work area lies directly within the light cone(s). From this, a main beam direction and a shape of the light cone(s) that directly illuminate the core area of the close area can be determined in a simple manner. In this way, the working area is closer and, just like the close range, sufficiently defined. The shape of the light cone(s) is again determined by the Fresnel lenses 1400a, 1400b, 1400c used, each of which has a main beam direction and, if necessary, an "asymmetrical" beam angle. By illuminating the close range, a limited area in front of the user of the helmet light 10 is well illuminated, which allows reliable and timely detection of obstacles when walking. At the same time, any possible glare for other people working near the user is kept to a minimum.

The user's long-distance area can be defined as the area of space in front of the user, which extends far beyond the near area into the distance. The long-distance area can, for example, partially overlap with the work area and can be illuminated in particular when the user wearing the protective helmet 30 is walking or "looking into the distance", i.e. looking into the "distance" with his head raised. This can be detected, for example, with the aid of a position sensor. The core area of the illuminated long-distance area, i.e. the light cone(s) emanating from the helmet light 10 that directly illuminates an area, can, for example, be assumed height of the protective helmet worn by the user of 1.8 m and an orientation of the protective helmet "parallel" to the ground, the beams begin about 5 m in front of the user and end approximately at infinity, and even point upwards towards the sky, so that the illuminated core area does not formally end in front of the user, but extends to infinity. In order to reduce a possible glare effect, however, it can be provided that the light cone emanating from the helmet light 10 hits the ground at a great distance, for example at a distance of 100 m. A lateral opening angle, starting from the helmet light, of the core area of the illuminated long-distance area can be around 60° or less, so that only a small area to the right and left lies directly within the light cone(s). From this, a main beam direction and a shape of the light cone(s) can be determined in a simple manner, which directly illuminate the core area of the long-distance area. Furthermore, the long-distance area can be sufficiently defined in this way. The shape of the light cone(s) is again determined by the Fresnel lenses used, each of which has a main beam direction and, if necessary, an "asymmetrical" beam angle. By illuminating the long-range area, an area far in front of the user of the helmet light 10 is illuminated, which allows reliable and timely detection of objects further away.

The lens unit 14 can further have areas at the lower edge of its rear side that allow diffuse light to emerge in the direction of the face of a user when an associated LED element 1610 emits light. This diffuse light can in particular make up the essential part of facial lighting.

The lens unit 14 therefore comprises a plurality of Fresnel lenses 1400a, 1400b, 1400c, which are arranged essentially next to one another. The exact number of the plurality of Fresnel lenses 1400a, 1400b, 1400c can be adjusted as required. The plurality of Fresnel lenses 1400a, 1400b, 1400c can also be divided into a first and a second subset of Fresnel lenses 1400a, 1400b, 1400c. The first subset of Fresnel lenses 1400a, 1400b, 1400c can then emit light, for example, when a work area of the user of the protective helmet 30 is illuminated when the user is wearing the protective helmet 30. The second subset of Fresnel lenses 1400a, 1400b, 1400c can in turn emit light when a distant area of the user of the protective helmet 30 is illuminated when the user is wearing the protective helmet 30. In this way, different areas can be illuminated by the helmet light 10 without the helmet light 10 itself or a protective helmet 30 to which the helmet light 10 is attached being moved. Individual lenses of the plurality of Fresnel lenses 1400a, 1400b, 1400c can also include the function of a diffuser in order to counteract a possible glare effect. This can apply in particular to the components of the helmet light 10 that are used to illuminate an area of the user's face. Light can be emitted via a portion of the first subset of Fresnel lenses 1400a, 1400b, 1400c, while at the same time light is also emitted via a portion of the second subset of Fresnel lenses 1400a, 1400b, 1400c, for example in order to illuminate a close-up area of the user of the protective helmet when the user is wearing the protective helmet 30. In this way, a stepped, gradual transition in the illumination between the work area and the long-distance area can be achieved, for example in order to illuminate a close-up area between the work area and the long-distance area, which partially overlaps with the work area and the long-distance area. A glare protection surrounding the lens unit 14 can be provided in order to prevent light from the lens unit 14 from accidentally falling directly onto the user's face, in particular into the user's eyes. The lens unit 14 can consist of a transparent material that attenuates yellow light the least in the visible frequency range. As an alternative, it is also conceivable that a cover 12 is detachably arranged in front of the lens unit 14 as part of the lens unit 14, which cover consists of a transparent material that attenuates yellow light the least in the visible frequency range. If the yellow component of the light generated by the helmet light 10 is attenuated the least, the yellow component in the emitted light is increased as a result, which appears "yellower". In this way, fog in particular can be illuminated better, since it scatters visible yellow light less than visible light in other colors. As already mentioned, individual Fresnel lenses 1400a, 1400b, 1400c of the plurality of Fresnel lenses 1400a, 1400b, 1400c can have different main beam directions from one another. In this way, light generated by the helmet light 10 can be focused in different directions to illuminate different areas around the user of the helmet light 10. Individual Fresnel lenses 1400a, 1400b, 1400c of the plurality of Fresnel lenses 1400a, 1400b, 1400c can focus emitted light to different degrees. If necessary, individual lenses can also act as scattering lenses that fan out light rays generated by LED elements 1610 in order to achieve less point-like illumination. This allows for different levels of "brightness" of illumination as required and in particular also enables more diffuse illumination of an area, for example to counteract glare.

5a shows a controller board 18 of the helmet light 10. The controller board 18 has, as already mentioned, conductor tracks 1608, which in 5a are not shown for the sake of simplicity. Only a few electronic elements are indicated in the central area of the controller board 18. Indicated in particular in the middle is a mechanical switching element 1612, which can be provided for operating the helmet light 10. The side areas of the controller board 18 are shown as angled relative to the central area, whereby, in order to realize this angle, millings 1602 are provided, at which the controller board 18 can be bent into the desired shape. A large number of holes 1604 are also arranged distributed over the controller board 18, which can help, for example, during assembly when attaching the cooler element 20 and the cover element 22. Light-emitting LED elements 1610 are also indicated in the front angled area. The LED elements 1610 can vary in their number and in their properties. For example, the lens unit 14 can be designed with "more" Fresnel lenses 1400a, 1400b, 1400c and the number of LED elements 1610 can be increased accordingly. It is also possible that the LED elements 1610, or at least some of them, are colored LED elements 1610 whose light color can be adjusted. In addition to the LED elements 1610 shown, which each belong to individual Fresnel lenses 1400a, 1400b, 1400c of the lens unit 14, the controller board 18 can also include further LED elements (not shown) that emit light in the direction of a lower edge of the controller board 18 or the lens unit 14, where the light emerges as diffuse light and can make up the majority of the facial lighting.

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

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

The 7a , 7b and 7c each show a ventilation slide 50 of a protective helmet 30 from different viewing directions. 7a shows the ventilation slide 50 from above. 7b shows the ventilation slide 50 from the side and 7c shows it from behind at an angle. The ventilation slide 50 is usually fixed to a helmet shell 36 of a protective helmet 30 in a displaceable manner, for example clipped in with the aid of a locking device, whereby locking lugs of the locking device, which can be arranged on the ventilation slide 50, for example, are then movable/displaceable within a channel in a helmet shell 36 of the protective helmet 30 together with the ventilation slide 50 relative to the protective helmet 30, so that in the 7a to 7c visible ventilation openings 53 correspond to corresponding openings on the helmet shell 36 of the protective helmet 30, or are offset from them. In the offset position, the ventilation openings 53 are closed (by the material of the helmet shell 36) while in the other position, i.e. the matching position, the ventilation openings 53 are open so that an exchange of air can take place between the interior of the helmet shell 36 and the outer space above the helmet shell 36. The 7a to 7c The ventilation slider 50 shown comprises, in addition to the ventilation openings 53, a number of helicopter LEDs 4000, 4002a, 4002b arranged centrally. When the ventilation slider 50 is mounted on the helmet shell 36 and the helmet shell 36 is worn by a user as part of a protective helmet 30, the helicopter LEDs 4002a and 4002b essentially point upwards when the user is standing, so that the user can be easily located from above in the dark. The helicopter LED 4000 is positioned at an angle relative to the two other helicopter LEDs 4002a and 4002b behind an edge 4004, so that the beam direction of the helicopter LED 4000 is also angled relative to the other helicopter LEDs 4002a and 4002b. In this way, if the ventilation slider 50 is worn by a user as part of a protective helmet 30, the helicopter LED 4000 can also be used to locate a user who is leaning forward or lying down (for example after a fall). For a user who is standing upright, the helicopter LED 4000 can be viewed or used as a sort of "position light" shining backwards. Depending on requirements, additional LEDs can be provided on the ventilation slider 50, for example to ensure that the user who is wearing a protective helmet 30 with such a ventilation slider 50 can also be located in lateral directions. By providing additional LEDs on the sides of the ventilation slider 50 in different, easily distinguishable colors, the orientation or direction of vision of the user can also be indicated at least roughly. For example, a first LED arranged on a left side when wearing the protective helmet 30 can shine in a first color and a second LED arranged on a right side when wearing the protective helmet can shine in a second color that is different from the first color, so that a distant observer can see, even in the dark, whether the wearer of the protective helmet 30 is facing the left side of his head or the right side of his head, from which the observer can in turn deduce the approximate direction of vision of the wearer of the protective helmet 30.

The helicopter LEDs 4000, 4002a and 4002b arranged in the ventilation slide 50 can, for example, be electrically connected to the helmet light 10, in particular via an electrical connection line, which is, for example, connected to the helmet light 10 on the 1 already known connector connector 3002 or the connector connector 3002a.

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

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

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

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

It is also conceivable that the additional electrical connection includes magnets and electrical contacts. The magnets also make it easier to blindly connect a plug to charge the battery pack, as the magnets pull the components of the plug connection into the correct position.

The 8a to 8i each show three-dimensional external views of a battery pack 100. The illustrations are partly simplified in order not to be dominated by unimportant details. 8a shows the battery pack 100 in deactivated state. The 8a The battery pack 100 shown comprises a substantially elongated and cuboid-shaped battery body 194, the edges of which, as shown in 8a shown, are bevelled. Rounding the edges is also conceivable as an alternative. On one side of the battery body 194, 8a a display and control element 102 is shown in an inactive state. In the lower part of the battery pack 100 a connector plug 192 is visible, which is already 1 is known. Using the connector plug 192, the battery pack 100 can be connected to the helmet light 10. In 8a the battery pack 100 is shown in its deactivated state, so that the display and control element 102 consequently shows "nothing". However, it is conceivable that the display and control element 102 can be used to switch individual display elements on the display and control element 102 on and off and can also be "labeled" accordingly in order to identify the control element even when it is de-energized.

8b shows the battery pack 100 from a side facing the display and control element 102 8a so that the back of the battery pack 100 is visible. The back of the battery pack 100 can be structured in different ways depending on requirements.

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

In the 8d The external view of the battery pack 100 corresponds to the viewing angle shown 8c . Opposite 8c the battery pack is in 8d but shown in a different operating state. In the 8c The LED backlight 2006 is activated in the battery pack 100 shown in the figure, which is indicated by the hatching used. 8d The LED background lighting 2006 is deactivated in the battery pack 100 shown, which is indicated by the absence of hatching. In the same way, hatching visible in the area of the battery charge level indicator 2002 can visualize the current charge level of the battery pack 100. The temperature indicator 2000 can visualize the temperature of the battery pack 100, for example by changing color or in another suitable way. Alternatively, it is also conceivable that in the vicinity of or instead of the 8d The temperature display 2000 directly shows the temperature of the battery pack 100 in digits. The example in the 8c and 8d The on/off button 2004 shown can provide different functions. For example, the on/off button 2004 can switch a helmet light 10 connected to the battery pack 100 on or off. As long as no helmet light 10 is connected to the battery pack 100, the on/off button 2004 can, for example, put the battery pack 100 itself into different operating states. For example, it can be used to query at least some of the information that can be displayed on the display area 2008 and, in particular, to activate or deactivate the battery charge level indicator 2002. The functions provided by the on/off button 2004 can be changed depending on the plugs connected to the battery pack 100, i.e. the charging plug 190 and the connection plug 192, whereby an internal logic circuit of the battery pack 100 recognizes which plugs are connected to the battery pack 100 based on measurable voltages at the connection contacts of the battery pack 100, which are described in more detail below. The special design of the charging plug 190 and the connection plug 192 allows the connection plug 192 and the charging plug 190 to be connected to the battery pack 100 at the same time, so that in this way, for example, several batteries can be connected to the helmet light 10 of the helmet light system at the same time. It is also possible to charge the battery pack 100 while the helmet light 10 is in use.

In addition to the helmet light 10, which can be switched to several operating modes and states, the helmet light system can comprise a transmitting and receiving module and an input device with a further transmitting and receiving module. The input device can then be connected to the helmet light 10 via the transmitting and receiving module and the further transmitting and receiving module in the form of a 2-way communication. This allows the helmet light 10 to be controlled via the input device and, conversely, the input device can also receive operating information from the helmet light 10 if the helmet light 10 is connected to the input device. In this way, the input device can be positioned as desired as an operating unit for the helmet light 10 and can in particular be arranged in the user's view, so that the operation of the helmet light system is simplified. The transmitting and receiving module and the further transmitting and receiving module can be radio modules or wired modules. The 2-way communication between the helmet light 10 and the input device can be established via a common communication protocol. The use of a common communication protocol also allows a more complex control of the helmet light system to be implemented, which goes beyond simply closing an electrical circuit to switch it on and off. The control of the helmet light system can therefore be flexible.

The 2-way communication used can be protected by encryption. In this way, unintentional external operation by any input device that accidentally connects to the helmet light 10 of the helmet light system can be prevented. This is particularly useful when several helmet light systems, each with their own input devices, are used close to one another. In this context, the entry of a password can be provided to secure the connection. The operating information received by the input device can also include status information of the helmet light system. The input device can then output the status information of the helmet light system. This also makes it easier to operate the helmet light system. The helmet light 10 of the helmet light system can also be connected to another input device while it is already connected to the input device. It is possible that the helmet light 10 is then primarily controlled by the other input device. In this way, for example, a priority operation can be carried out by an operations manager or a monitoring system installed at a location, for example switching on a camera, a helicopter light or a position light if the helmet light system has such options. the switching off of individual operating functions can be prevented by the higher-level instance.

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

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

The control controller can also be set up to adjust a dynamic focal length of the camera unit depending on an operating mode and/or an operating state of the helmet light. This can also improve the recording quality of the camera. This can be done, for example, by adjusting the zoom, for example to expand or reduce the angle of view.

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

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

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

The 8h , 8i and 8y show the battery pack 100 from different angles without plugs connected. The 8h The battery pack 100 shown is in a switched-off operating state, so that the display area 2008 does not display anything. However, it is also conceivable that the display area 2008 shows at least the on/off button 2004 even in the power-off state, for example in the form of a transparent film image. In the lower area of the battery pack 100, electrical contact surfaces 1112c are visible on a front side 1124 of the battery body 194. Furthermore, a notch-like recess 1114a is visible, which serves to center the connection plug 192 or the charging plug 190 and at the same time prevents the plug from shearing off sideways when mounted. cker from the battery pack 100 is prevented. 8y shows the battery pack 100 from a different side, so that the recess 1114a on the front side 1124 of the battery body 194 is more clearly visible. In 8i the battery pack is shown in such a way that the other end face of the battery pack 100 opposite the end face 1124 is visible, which can be designed to be completely smooth, for example. If required, however, additional connection options in the form of electrical contact surfaces, guide elements or additional operating elements can also be arranged on this other end face.

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

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

On the side opposite the electrical contact 1108a, which is in 9b is shown, that is, the back of the battery plug 192, a recess 1114b is again provided. Furthermore, an electrical contact surface 1112a can also be seen, wherein the electrical contact surface 1112a serves for the electrical connection of the connection plug 192 to the charging plug 190.

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

With the help of the various possible and matching combinations of projections 1114a, 114b and recesses 1116a, 1116b, a simple joining aid for the plug connection can be implemented, which does not hinder easy release when a pulling force is applied to the connector plug 192 and at the same time ensures that in the absence of a pulling force, the electrical contacts closed with the help of the plug connection remain securely and, above all, correctly connected to one another. If the respective projections and recesses are arranged asymmetrically on the contact surfaces, a simple anti-twisting device is implemented.

The 9d and 9e show a possible internal structure of a connector plug 192 from two essentially opposite viewing directions, so that a front side and a back side of the internal structure are visible. For the sake of simplicity, cable connections of the connector plug 192 leading away from the connector plug 192 have been omitted. Inside the connector plug 192, hidden by the potting compound 1110a or a housing that fulfills the same function, there is a PCB 1106a on which the already known electrical contact 1108a is arranged. The electrical contact surface 1112a can be seen on the opposite side. Both the electrical contact 1108a and the electrical contact surface 1112a extend through the potting compound to the surface of the connector plug 192, so that other elements on both elements can be electrically contacted with the connector plug 192. In the side area of the PCB 1106a there are two magnets 1104a. The magnets 1104a interact with corresponding counterparts in the battery pack 100 or the charging plug 190, so that reversal of the polarity of the electrical connections can be excluded when connecting them. This serves as an additional safety measure. Furthermore, the magnets 1104a, together with the corresponding counterparts on the battery pack 100, automatically pull the connector plug 192 into the correct position and ensure that the connector plug 192 and the battery pack 100 are held together securely even under mechanical stress in the joining direction.

This coupling and connection mechanism makes it possible for tangled cable loops of the connecting cable 24 to open if the user of a protective helmet 30 equipped with the helmet light system makes a careless movement while wearing the protective helmet 30. As soon as the pull on a tangled cable loop exceeds the holding force that can be applied by the magnets 204, 1104a, 1104b, the connector plug 192 is automatically released from the battery pack 100 while the cable loop opens. Furthermore, connecting the connector plug 192 to the battery pack 100 is made easier because the magnets 204, 1104a, 1104b automatically pull the two components of the plug connection into the correct position, so that blindly closing the connection is greatly simplified.

The 10a and 10b show three-dimensional external views of a charging plug 190 from different angles. The charging plug 190, which is already 8d and 8e The previously known charging plug 190 also has a projection 1116b, similar to the connector plug 192. Furthermore, an electrical contact 1108b is also provided on the same side of the charging plug 190. Analogous to the connector plug 192, the housing of the charging plug 190 is also formed from a casting compound 1110b, whereby a fluid-tight structure made up of individual housing elements, in particular housing shells, is also possible here. 10a On the side of the charging plug 190 shown, which is opposite the side with the electrical contact 1108b, no electrical contact surface is provided, unlike the connector plug 192. With the help of the possible combinations of projection 116b and recess, a simple joining aid for the plug connection can be realized, which does not hinder easy release when a pulling force is applied to 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 securely and, above all, correctly connected to one another.

In this context, it can be provided that the projection and the recess are each formed asymmetrically, preferably on an edge, of the respective connection surfaces. This provides a simple anti-twisting device.

The 10c and 10d show a possible internal structure of a charging plug 190 from two essentially opposite viewing directions, so that a front side and a back side of the internal structure are visible. In each case, a PCB 1106b of the charging plug 190 provided inside the charging plug 190 is shown, on which, analogous to the connection plug 192, electrical contact surfaces 1112b as well as an electrical contact 1108b and magnets 1104b are also provided.

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

The 11a and 11b each show a three-dimensional representation of a charging port of a battery pack 100. In the lower part of the two 11a and 11b The battery body 194 of the battery pack 100 is partially visible. In the upper part of the battery body 194, 11a The connector plug 192 is already attached. The connector plug 192 comprises in the 11a selected representation, a circumferential sealing lip 196 pointing radially inward with respect to an axial longitudinal extension of the battery body 194. The sealing lip 196 is located in the axial direction below a protruding circumferential collar 196a of the connector plug 192. The sealing lip 196 serves in particular to produce a sealing connection, that is to say a fluid-tight connection, between the connector plug 192 and the Battery body 194 on this attachable in 11 a charging plug 190, not shown. This is relevant in that the electrical connection points between the connector plug 192 and the charging plug 190 would corrode more if moisture were to occur during an existing current flow between the connector plug 192 and the charging plug 190. At this point, it should be noted that the connector plug 192, which was previously described in connection with the 9a to 9c described, does not have such a collar 196a and no sealing lip 196, but can be easily supplemented with these elements. Alternatively, it is of course also conceivable that the collar 196a and the sealing lip 196 are not provided on the connection plug 192, but on the charging plug 190. This would then have the advantage that the electrical contact 1108b of the charging plug 190, which protrudes from the plane of the connection plug, is given additional protection against mechanical damage by the collar 196a.

In 11a Also 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 enclosed by the sealing lip 196. Due to the arrangement of the charging contacts 198 and the communication contacts 200, a rotation-proof assembly of the charging plug 190 (not shown) can be realized. The special arrangement of the charging contacts 198 and the communication contacts 200 is to be understood as an example. In particular, the charging contacts 198 and the communication contacts 200 can be further subdivided. It is also conceivable that in addition to the 11a In addition to the charging contacts 198 and the communication contacts 200 shown, further contacts are provided on the area of the connector plug 192 enclosed by the sealing lip 196. In the event that the electrical contact surface 1112a for the charging plug 190 on the connector plug 192 is designed to be anti-twisting, for example, half of the charging contacts 198 and the communication contacts 200 can be brought together inside the connector plug 192 in order to achieve simple anti-twisting. The 11 a and 11b The connection surfaces of the battery pack 100 and the connector plug 192 shown do not have any projection or recess, as described in the previous figures, for example, in order to provide an anti-twisting device. However, these can be added in a simple manner.

In 11b the upper part of the battery body 194 of the battery pack 100 is shown without the connector plug 192, which, analogously to the free end of the connector plug 192, comprises a sealing lip 208 arranged in an axial extension direction of the battery body 194 behind a collar 208a, which encloses a front side of the battery body 194. On the front side of the battery body 194, an electrical contact surface in the form of communication contacts 202 and connection contacts 206 is again indicated. The connection contacts 206 can be provided both for the electrical supply of a connected helmet light 10 with electrical energy and for charging the battery pack 100. It should also be noted that the respective communication contacts 200, 202 and the connection contacts 206 or the charging contacts 198 are shown set back from the respective front surface, i.e. are located below the respective housing surface facing outwards. This arrangement is optional; it can also be provided that all or at least some of the contacts are flush with the respective housing surface facing outwards. Furthermore, it is again possible to arrange the sealing lip 208 and the associated collar 208a on the connector plug 192.

Furthermore, magnets 204 are indicated on the front side of the battery body 194, which can hold the connector plug 192 on the battery body 194 in a desired connection position. The sealing lip 208, like the sealing lip 196 on the connector plug 192, ensures the water-protected electrical contact between the battery body 194 and the connector plug 192 that can be connected to it or the charging plug 190, if the latter is connected directly to the battery body 194 to charge the battery pack 100. The magnets 204 are in 11b on the visible surface of the front side of the battery body 194. However, they can also be arranged invisibly under the protective outer shell of the battery body 194, i.e. inside the housing of the battery body 194, in particular to prevent corrosion of the magnets 204. The arrangement of the magnets 204 is optional. However, if the magnets 204 are present, they can not only serve to fix a plug to be connected in a desired position, but also provide an anti-twisting device, provided that the plug to be connected, the connection plug 192 or the charging plug 190, also has magnets with a suitable orientation.

The 12a and 12b show the internal structure of a battery pack 100 from different angles. 12a and 12b two battery cells 1118 each. These battery cells 1118 have a conventional cylindrical shape in an axial extension direction. On the 12a downwards or backwards facing surfaces, which in 12b pointing forwards or upwards, a PCB 1106d and a cover 1122 that is electrically insulated or insulating from the PCB 1106d can be seen. The cover 1122 can be made of sheet metal, for example, and can be electrically insulated from the PCB 1106d. Indicated on the PCB 1106d are also 11b already known electrical contact surfaces, but in a different 11b different arrangement.

In addition to the PCB 1106d, there is another PCB 1106c on the surface of the battery cells 1118 facing upwards, on which a foil cover 1120 is indicated, which can have both a button and a display functionality for the battery pack 100. The button and display functionality of the foil cover 1120 has already been described in connection with the 8c and 8d explained. The 12b For example, the components shown may be molded into the housing of the battery body 194 or otherwise integrated to form the battery pack 100, as shown in the thumbnail illustration in the upper right corner of 12b is indicated, where the battery pack 100 is shown together with the connection and charging plugs 190, 192, which are not shown in more detail. The external shape of the battery pack 100 can of course be designed variably and in particular does not have to correspond exactly to the miniature representation.

A battery pack temperature sensor can also be arranged inside the battery pack 100 or on its surface. This battery pack temperature sensor can detect a battery pack operating temperature value of the battery pack, which is transmitted to and received by a control controller of the helmet light 10, for example. Based on the received battery pack temperature value, the control controller can then change an operating state of the helmet light 10, for example to keep the battery pack 100 within a tolerable temperature range. The battery pack 100 also comprises an electrical heating unit that can be controlled by the control controller, in particular based on the received battery pack temperature value. For example, the control controller can switch on the electrical heating unit when the battery pack 100 falls below a lower temperature threshold value T _{Akku_min} . The electrical heating unit can of course also be switched off in a temperature-controlled manner, advantageously in a hysteresis-like manner when another threshold value is exceeded that is slightly greater than the lower temperature threshold value T _{Akku_min} . The control controller can also reduce the light output of the helmet light if the detected battery pack operating temperature value of the battery pack 100 exceeds a tolerable temperature threshold value T _{battery_max} . By reducing the light output, i.e. reducing the brightness of the helmet light 10, the electrical power taken from the battery pack 100 is reduced, which immediately reduces the waste heat generated, so that the temperature of the battery pack 100 can drop, assuming a constant rate of waste heat being released to the environment. This can be advantageous, for example, in an environment where there is a risk of explosion.

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

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

In the 13a to 13h The special design of the battery holder 214 described serves to ensure the safety of a user of the protective helmet. The provision of the upper and lower retaining hooks 218a, 218b, 222a, 222b ensures that the battery holder 214 is firmly positioned on the helmet shell 36, but can still be easily released if necessary. An object striking the protective helmet 30 from above, such as a branch, can slide down the protective helmet 30 and, if it gets caught on the battery holder 214, can release the battery holder 214 from the protective helmet 30 without the protective helmet 30 being ripped off the head of a user wearing the protective helmet 30 and without the user experiencing the full force of the impact of the striking object.

By orienting the open hooking sides of the upper retaining hooks 218a, 218b in the direction of the open hooking sides of the lower retaining hooks 222a, 222b, it is ensured that when an object impacts the protective helmet 30 from above and hits the battery holder 214, a release force is generated that initially loads the closed side of the upper retaining claws 218a, 218b, so that these may break under the force of the impact and thus initiate a release of the battery holder 214 from the helmet shell 30. At the same time, the lower retaining claws 222a, 222b are pushed down from the helmet shell 30 in their open direction, and the battery holder 214 is completely released from the helmet shell 30. Since the open hooking sides of the upper retaining hooks 218a, 218b are larger than the open hooking sides of the lower retaining hooks 222a, 222b as shown in the figures, the battery holder 214 can be easily attached to the helmet shell 30, since bending the upper retaining hooks 218a, 218b during the fastening process requires a comparatively small force. At the same time, this configuration keeps the force required to break the upper retaining hooks 218a, 218b comparatively small, so that the battery holder 214 can also be released simply and easily in an emergency, i.e. when an object hits the protective helmet 30 from above.

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

14b shows a detailed view of a helmet shell 36 with a helmet light 10 attached to it. In 14b a different viewing direction is selected compared to 14a, so that the helmet light 10 is shown "from below" and thus the helmet shell 36 can also be seen from "below". Visible from the helmet light 10 are, among other things, the switch 120, the glare protection 124, the holding elements 122 arranged on the right and left sides as well as the cooling element 20 with its cooling fins and the surrounding bead.

The curved shape of the cover element 22 ensures, in particular through the holding elements 122 arranged at the right and left ends, that the helmet light 10 clipped onto the helmet shell 36 cannot slip sideways, but remains firmly fixed in a central position. Clipping is carried out, as already mentioned, for example with the help of the front holding claws 112 and 114, which are in 14b are not visible, in conjunction with the rear retaining claws 116, 118, which are attached to the front retaining claw len 112 and 114 opposite side of the helmet light 10, hook it onto a reinforcing rib 62 of the helmet shell 36.

14c shows a section of the helmet shell 36 from above. While 14d a section of a helmet shell with attached helmet light from below. Visible in 14c is in particular the front edge 56 of the helmet shell 36 and a structure on the surface of the helmet shell 36 in the form of profile lines, which serve to stiffen the helmet shell 36. The profile lines present on the top of the helmet shell 36 can in particular interact with the already mentioned reinforcing rib 62 on the inside of the helmet shell 36 in order to achieve the desired mechanical stability. In 14d however, the helmet light 10 and the front edge 56 with the notch/groove 58 as well as the front holding claws 112 and 114 hooked into it are easier to see. The notch/groove 58 on the front edge 56 also has a positioning aid for the helmet light 10 in the form of a web 110, which limits the mobility of the front holding claws 112 and 114 in the notch/groove 58 on the front edge 56 of the helmet shell 36.

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

15 shows a three-dimensional overall view of a helmet shell 36 with helmet light 10 attached to it from below. Inside the 15 A carrying basket 42 is indicated on the helmet shell 36 shown, which is described in more detail below and which is an integral part of a protective helmet 30 with the helmet shell 36. In connection with the carrying basket 42, a clamping unit 48 is to be mentioned, with the help of which the carrying basket 42 can be adjusted in size to a user's head size, in particular when putting it on and taking it off. In 15 pointing to the right, the helmet light 10 is shown attached to the "front" area of the helmet shell 36. Also visible in this front area is a face shield 32, which has a not further described 15 described bracket construction is connected to the helmet shell 36 and is pivotably mounted on it. In the left area of 15 , which corresponds to the "rear" area of the helmet shell 36, the battery holder 214 is indicated, which is intended to contain the battery pack 100. The helmet light 10 is coupled via the connection cable 24 to the battery pack 100 present in the battery holder 214. The connection cable 24 can be firmly or detachably coupled to the helmet light 10, as already described in connection with 1 On the opposite side of the helmet light 10 is also the 1 The already known connector plug connection 3002 with a further connection cable 28 connected to it is provided. The connector plug connection 3002 with the further connection cable 28 arranged thereon can be used in particular to connect the previously described "helicopter light" with the helmet light 10. The battery holder 214 indicated in the rear area of the helmet shell 36 can be attached in particular to openings present in the helmet shell 36 via the 15 merely indicated upper retaining hooks 218a, 218b, whereby the lower retaining hooks 222a and 222b of the battery holder 214 are in the 15 selected representation may be obscured by other elements of the protective helmet 30.

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

In addition to the safety goggles 130, 16b also the carrying basket 42 is indicated, which, as seen from the helmet shell 36, is located even further “inwards” away from the helmet shell 36, so that from the outside to the inside there is first the helmet shell 36, then the helmet light 10, then the protective goggles 130 and finally the carrying basket 42.

The 17a and 17b show detailed views of a section of a helmet shell 36 with a battery holder 214 attached to it from different viewing directions. The battery holder 214 is empty in each case, which means in particular that no battery pack 100 is inserted into the battery holder 214. There are openings on the helmet shell 36 which can be aligned with the ventilation openings 53, which in turn are provided on the ventilation slide 50, which is shown by way of example in the 7a to 7c The ventilation slider 50 is movably fixed to the helmet shell 36 so that the openings on the helmet shell 36 can be made to coincide with the ventilation openings 53 on the ventilation slider 50 (are open) or are displaced against one another so that the openings on the helmet shell 36 are at least largely closed by the ventilation slider 50. The openings on the helmet shell 36 and the ventilation openings 53 on the ventilation slider 50 can in particular be arranged symmetrically to a plane of symmetry of the helmet shell 36 running from the rear, i.e. from the battery holder 214, to the front, i.e. to the helmet light 10.

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

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

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

If an object hits the helmet shell 36 from above, the upper holding arms 216a, 216b allow the greater flexibility of the battery holder 214, which was already helpful when mounting the battery holder 214 on the helmet shell 36, and also a later breakage of the upper holding hooks 218a, 218b, since part of the impact force of the object hitting the helmet shell 36 and the battery holder 214 is initially deformed as elastic deformation of the battery holder 214, in particular the upper holding arms 216a, 216b are removed. If the upper retaining hooks 218a, 218b are finally broken by excessive deformation, it is generally guaranteed that the battery holder 214 will completely detach from the helmet shell 36, fall downwards and not just remain partially fixed to the helmet shell 36.

The recognizable step 223 rests against an edge of the helmet shell 36 in such a way that the ventilation slide 50, which is mounted displaceably relative to the helmet shell 36, can be moved beyond the step 223 in the direction of the edge of the opening in the helmet shell 36. This enables the ventilation slide 50 to further close the ventilation openings 53 in the helmet shell 53, through which the upper retaining hooks 218a, 218b reach into the helmet shell 36.

In 17b a structuring of the ventilation slide 50 is visible, on which on both sides of the edge 4004 the 7a to 7c known LEDs are arranged, namely the helicopter LED 4000 and the further helicopter LED 4002a, which have different beam directions due to the edge 4004. The beam directions of the two in 17b The helicopter LEDs 4000 and 4002a that can be recognized can be designed essentially perpendicular to one another in such a way that, for example, the helicopter LED 4000 can function as a "tail light" when the wearer is standing upright, while the other helicopter LED 4002a then shines upwards and is visible from above. If the wearer of the protective helmet 30 bends down, however, the helicopter LED 4000 shines upwards. Additional LEDs, for example with a "lateral" beam direction, can be provided if required.

18 shows a partial detailed view of the helmet shell 36 with the battery holder 214 attached to it and the battery pack 100 inserted. In the rear area of the helmet shell 36, the two lower retaining hooks 222a and 222b can be seen in particular, which surround a lower rear edge of the helmet shell 36 and are arranged directly on the frame of the battery holder 214. Below the helmet shell 36, a clamping unit 48 can also be seen, which will be explained in more detail in connection with the previously mentioned carrying basket 42. The connecting cable 24 emerges from the interior of the helmet shell 36, which extends into the battery holder 214 and establishes a connection between the helmet light 10 fixed in the front area of the helmet shell 36 and the battery pack 100 inserted in the battery holder 214 via the connecting plug 192, which is not individually visible, wherein the battery pack 100 is held by the elastic tab 224 in the frame of the battery holder 214.

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

In connection with the protective goggles 130, a material selection of the protective goggles 130 adapted to the visual performance of the user 26 can also be provided. This means that the protective goggles 130, which are also pivotably mounted relative to the helmet shell 36, can take on the role of a visual aid in the sense of glasses for the user 26.

22 shows a detailed view of a protective helmet 30 with a helmet light 10 attached to it, viewed diagonally from above. 22 the protective helmet 30 is shown with the face shield 32 pivoted upwards relative to the helmet shell 36, whereby from this perspective the front edge 56 of the helmet shell 36 remains visible, even if the 21 previously recognizable notch/groove 58 is located below the helmet shell 36 from the viewer, and the face protection 32 is also located between the helmet light 10 and the viewer from this perspective. Accordingly, the helmet light 10, just like the user's face 26 of the protective helmet 30, protected by the face shield 32 against mechanical influences from outside.

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

Three support arms designed as spacers serve as a means for a three-point fastening of the interior fittings or interior fittings assembly 40 to the helmet shell 36, whereby 24 only two support arms 54 are visible. In order to lock the support arm 54 running in the longitudinal direction of the helmet shell 36 to the helmet shell 36, the latter is provided with a slot in the back of the head in which the correspondingly shaped free end of the support arm 54 pointing in the longitudinal direction can be detachably locked onto the helmet shell 36. The helmet shell 36 and the support arms 54 are dimensioned and arranged (i.e. their clear width is so long and so wide) that there is a free space between the interior fittings assembly 40 and the helmet shell 36 to accommodate the helmet light 10, the associated wiring, ear muffs 35a of the ear muffs 34 and other helmet accessories as well as fastening devices at least for the face protection 32 and the ear muffs 34. The other helmet accessories include the already mentioned tensioning unit 48 of the neck strap 46.

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

The helmet shell 36 is extended so far forward that it also serves as a shield above the eyes of the user 26. The helmet shell 36 therefore has a uniformly rising outer surface in its front area towards the rear without any significant gradation, so that it offers no hooking points for obstacles such as branches. The transverse reinforcing ribs 62 are formed on the inner surface of the helmet shell 36 in the front and middle helmet areas. A further reinforcing rib extending in the longitudinal direction of the protective helmet 30 can be formed transversely to the reinforcing ribs 62 and in the middle. In the middle area of the helmet shell 36, the reinforcing ribs 62 adjoin a slightly inwardly recessed area, which has openings 52 in paired groups. In the recessed area, the ventilation slide 50 is slidably arranged on the outer surface of the helmet shell 36, which engages with downward and inwardly projecting retaining knobs in two front guide slots on the helmet shell 36 and with two further retaining knobs in two rear guide slots on the helmet shell 36. The ventilation slide 50 comprises the ventilation openings 53 arranged congruently with the openings 52 ( 24 ), which in the ventilation position are located above the openings 52 and in the closed position are arranged offset so that the openings 52 are closed by the ventilation slide 50. The lower edge of the protective helmet 30 is pulled downwards at the sides in the area of the temples and at the side in the area of the back of the head. The above-mentioned free space between the interior fittings assembly 40 and the helmet shell 36 is thereby enlarged downwards in these areas. This makes it easier to attach fastening devices to the inside of the helmet shell 36 and to stow the ear defenders 35a in the free space between the helmet shell 36 and the carrying basket 42.

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

At the rear end, the helmet shell 36 is provided with a recess 76 at the lower edge in the middle, behind which the tensioning unit 48 of the neck strap 46 is located when the protective helmet 30 is fully assembled and is thus accessible for manual operation to tension or relax the neck strap 46.

A hearing protection fastening device 80 for the hearing protection 34 has two hearing protection bearing points 80a on the inside of the helmet shell 36. The hearing protection bearing points 80a are pivot bearings which are molded onto the inside of the helmet shell 36 or, preferably, are permanently attached as additional parts. Support brackets 37a with the respective hearing protection capsules 35a are pivotally mounted in the hearing protection bearing points 80a.

A face protection fastening device 84 for the face protection 32 has two face protection bearing points 84a on the inside of the helmet shell 36. Holding arms 132a of a visor 132 are pivotally mounted in the face protection bearing points 84a. The face protection bearing points 84a are not formed on the inside of the helmet shell 36, but rather on a plug 136a, which are plugged onto the rod-like projections 74b in order to simultaneously fix the free ends of the support arms 54 onto the rod-like projections 74b. The face protection bearing points 84a are located with their associated plugs 136a in the assembled state in the free space, namely in an area in which the helmet shell 36 is pulled downwards at its lower edge, as already explained above.

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

The carrying basket 42 is formed from a rigid, elastically flexible material, preferably from a plastic such as polyamide. The carrying basket 42 is provided in two temple areas and in a back of the head area with a rigid support arm 54 that projects diagonally downwards or backwards, which together serve to provide a three-point attachment of the interior fittings assembly 40 to the helmet shell 36. This arrangement enables the free space in the helmet shell 36 that extends continuously around the interior fittings assembly 40, which in turn serves to accommodate ear protection capsules 35a, helmet light 10 and other helmet accessories as well as fastening devices 80, 84 for the face and ear protection 32 and 34, respectively. The carrying basket 42 is manufactured as a one-piece plastic molded part in the embodiment described here. The carrying basket 42 can be formed from two pairs of mutually spaced-apart carrying strips that cross in the middle and whose lower ends merge into a single, circumferentially closed carrying strip at four connection points. A piece of padding material, in particular cross-shaped, can be provided that rests on the carrying strips in order to increase carrying comfort.

The support arms 54 can project from the support basket 42, in particular at the connection points. The headband 44 is molded onto the support basket 42. The neckband 46 has two front ends which are detachably connected to rear free ends of the headband 44, for example by a snap connection not shown in detail. The neckband 46 has, as shown in the 23a and 24 two free ends that can be detachably connected to one another in the neck area using the tensioning unit 48. The neck strap 46 can be made of the same material as the carrying basket 42. The neck strap 46 is connected to the carrying basket 42 in a height-adjustable manner between its connections to the head strap 44 and its free ends. For this purpose, the carrying basket 42 has two support arms that protrude downwards, to which the neck strap 46 can be fixed at a selectable height. The neck strap 46 has three holes arranged one above the other on each side, which can be snapped into place on a spring-loaded bolt 49 that protrudes from each support arm.

In the example described above, the support arms 54 are attached to the helmet shell 36 in different ways, but this is not absolutely necessary. The support arms 54 can all be attached to the helmet shell 36 in the same way. To do this, the different attachment means only need to be standardized.

For the three-point fastening of the interior fitting assembly 40 to the helmet shell 36, the rearwardly projecting support arm 54 is pushed into a slot provided for this purpose in the helmet shell 36 until projections provided on this support arm 54 engage on the outside of the helmet shell 36. The interior fitting assembly 40 is then moved further inwards towards the inner surface of the helmet shell 36, whereby the laterally extending the support arms 54 are slipped over the rod-like projections 74b. Through-openings in the laterally extending support arms 54 receive the rod-like projections 74b in a form-fitting manner. When the laterally extending support arms 54 rest in the gusset between the helmet shell 36 and the rod-like projections 74b on the inside of the helmet, plugs 136a are plugged onto the rod-like projections 74b in order to fix the laterally extending support arms 54 in their position. The interior fittings assembly 40 and the helmet shell 36 are now firmly connected to one another at three points. As soon as the protective helmet 30 has been placed on the head and fastened to the head with the aid of the tensioning unit 48, a chin strap (not shown) can be tightened under the chin if necessary. The through openings in the laterally extending support arms 54 each engage the rod-like projections 74b over a length that is at least as large as the clear width of the through openings. If a force is exerted on the support arms 54 by a load on the helmet 30 from above, the support arms 54 are subjected to a tensile load by the helmet shell 36, which is supported on the ends of the support arms. This force acting on the support arms 54 generates a moment at each of the three points that tends to deform the helmet shell 36 inwards to the lower edge. The helmet shell 36 thus converts 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 transfer of the moment from the support arms 54 to the helmet shell 36 is further increased by the fact that the support arms 54 are additionally stiffened by molded-on ribs.

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

Each support bracket 37a is designed to be spring-loaded in an area between its two ends, in which it extends into the free space, so that the ear protectors 35a are folded away from the ear when each support bracket 37a is not folded, and are folded against the ear when the support bracket 37a is folded. When the protective helmet 30 is not placed on the head, the two ear protectors 35a in the latter part each reach a position that is significantly further inward than the ear against which each ear protector 35a is intended to rest. In other words, the mutual distance between the ear protectors is in this case significantly smaller than the mutual distance between the ears. This ensures that when the protective helmet 30 is placed on the head, the ear protectors 35a are held against the ears by the spring preload. The spring preload for bending each support bracket 37a between two defined positions is provided by a ring-shaped bracket spring 92a. Each support bracket 37a can be moved by hand into a bent and a non-bent position. In each of these positions, the bracket spring 92a causes an end position lock. The end position lock of the support bracket 37a is not achieved when the protective helmet is on because, as mentioned, each ear protection capsule 35a is to be held pressed against the ear with a spring.

In addition, each hearing protection bearing point 80a and each support bracket 37a are designed such that the support brackets 37a can only be pivoted between the operating position and the parking position. This ensures that the hearing protection capsules 35a can be stowed in the free space behind the ear without colliding with the ears and the lower edge of the helmet shell 36.

The face shield 32 is described in more detail below. 24 shows the protective helmet 30 in an exploded view and partly in section, whereby the face protection 32 can be seen in association with other helmet accessories.

The face protection 32 comprises the visor 132 with two holding arms 32a and two plugs 136a, on each of which the face protection bearing point 84a is formed as a fastening device for the face protection 84. The plugs 136a are plugged onto the rod-like projections 74b, whereby the face protection bearing points 84a come to lie in the temple area on the inside of the helmet shell 36. The plug 136a with the face protection bearing point 84a is in 24 to recognize The oppositely arranged parts of the fastening are not shown. Each face protection bearing point 84a has three axially projecting, elastically flexible cams 85a, over which the holding arms 132a with ring bearing bushes can be pushed in order to detachably and pivotably fasten the holding arms 132a in the face protection bearing points 84a. The face protection bearing points 84a and the holding arms 132a are arranged and designed such that each holding arm 132a can be pivoted in the free space between two positions, an operating position in which the visor 132 is folded down and protects the face ( 20 ), and a parking position in which the visor 132 is folded up and is arranged closely on the outer surface of the helmet shell 36 ( 21 and 22 ). The fastening device 84 for the face shield 32 contains a self-locking holder for each holding arm 132a. For this purpose, each plug 136a contains a spring-loaded bolt which holds the ring bearing bush 134a attached to the holding arms 132a in a spring-loaded manner in the operating position and in the parking position.

The visor 132 forms a fork with each support arm 132a ( 24 ), in which the wall of the helmet shell 36 is tightly received when the visor is open. When the visor 132 is closed, the upper edge of the visor rests on the front edge of the helmet shell 36, and the side edges of the visor 132 rest on the outer surface of the helmet shell 36. Therefore, neither when the visor is closed nor when the visor is open, is there any possibility that branches can hook onto the holding arms 132a or the visor 132 itself when the protective helmet 30 is being used, for example during forestry work, and endanger the user 26.

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

Also visible below the helmet shell 36 is the helmet light 10 fixed to the front area of the helmet shell 36. Furthermore, the battery holder 214 arranged on the outside of the rear area of the helmet shell 36 is also visible, whereby of the holding elements of the battery holder 214 only the upper holding hook 218a and the lower holding hook 222a are visible. Furthermore, the connection cable 24 is indicated below the helmet shell, which runs from the helmet light 10 to the battery pack 100 arranged in the battery holder 214, which is also not visible. For the sake of simplicity, the connecting cable 24 is not routed along the lower edge of the helmet on the inside of the lower edge of the helmet shell 36, but rather across 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 in that a connecting cable 24 running close to the lower edge of the helmet shell 36 could easily interact with objects outside the helmet shell 36 and in particular could be pulled out of the intended position on the battery pack 100 by these without this being intended. To avoid this, on the one hand an adapted length of the connecting cable 24 is advantageous and furthermore a special recess/opening can also be provided in the helmet shell 36 through which the connecting cable 24 can be routed in order to connect the helmet light 10 to the battery pack 100 in the battery holder 214.

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

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

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

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

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

On the one hand, the status of the connection to the helmet light 10 is indicated in the upper area by the hatching that a connection is being established, and this is simultaneously indicated in writing as “Connecting”. 25b The hatching shown can indicate a striking color design of the input screen in the marked area. When the connection is established, the display can be changed accordingly. In addition, in the lower area of 25b a camera module of the helmet light 10, which is referred to as "PROTOS CAM", is marked as switched on and can be controlled via the corresponding button. The marking is again indicated by means of hatching, which can again represent a color contrast or a color change, and can additionally or alternatively be done in writing. For example, the various buttons can change from red to green, which could correspond to an inactive or active state. It is also possible to mark a change between a disconnected and a connected state by changing colors. In the lower area of the 25b and 25c It is also indicated that the full range of functions of the various lighting modes provided by the helmet light 10 can be made recognizable to the user with the help of one or more demo functions. These various demos can, on the one hand, illustrate the various basic functions of the helmet light 10 to the user in an initial phase and, on the other hand, serve to check the unrestricted functionality of the lighting modes to be provided, particularly in a later phase of use in which the user has already gained sufficient experience in operating the helmet light 10. In a similar way, the other 25d to 25i different operating states of the helmet light 10 visually and/or in written form in the different views of the respective graphical user interface of the app.

In particular, the 25d , 25f and 25h The hatched light cone, which is visible in connection with the stylized user, visualizes various possible lighting modes of the helmet light 10. The 25d two light cones, the lower one being the walking light and the upper one being the working light. 25f shows a light cone for a face light in the upper area of the stylized head of the user and the light cone of the walking light individually in the lower area. 25h again shows the light cone of a helicopter light. Different light intensities between 0 and 100% can be selected independently or together for the individual lighting modes. Furthermore, a short-term "turbo operation" can also be provided, which lies outside the usual working specification of the LED elements 1610 of the helmet light 10 used, which can briefly increase the light output of the LED elements 1610 operated in this way. This functionality can be selected, for example, by permanently holding down a "turbo" touch surface shown in the various figures. Furthermore, the temperature display for the helmet light 10 can also be visible, whereby a permissible maximum temperature can be set via an associated control element, for example. Above a measured maximum temperature of this kind, a reduction in the power of the helmet light 10 can be provided. As in the lower area of 25d As can be seen, different light modes of the helmet light 10 can be switched in different ways, for example pulsating with varying pulse duration. It may also be possible to increase the lighting intensity over time in order to avoid any glare when the helmet light 10 is switched on abruptly. In a similar way, if the battery pack 100 is about to run out of power, it is also conceivable to switch the helmet light 10 off over time.

The features of the invention disclosed in the above description, in the drawings and in the claims may be essential for the realization of the invention both individually and in any combination.

List of reference symbols

10

Helmet light

12

cover

14

Lens unit

16

Support element

18

Controller board

20

Radiator element

21

Cooling fin

22

Cover element

23

screw

24

Connection cable

25

Recess

26

user

28

additional connection cable

30

Safety helmet

32

Face protection

34

ear protection

35a

Ear protection capsule

36

Helmet shell

37a

Carrying handle

40

Interior assembly

42

Carrying basket

44

Headband

46

Neckband

48

Clamping unit

49

bolt

50

Ventilation slider

52

openings

53

Ventilation opening

54

Beam

56

Front edge

58

Notch/Groove

62

Reinforcing rib

64

branch

74b

rod-like projection

76

Recess

80

Fastening device for hearing protection

80a

Hearing protection bearing point

84

Face shield attachment device

84a

Face shield bearing point

85a

cam

92a

Bow spring

100

Battery pack

102

Display and control element

110

web

112

front retaining claw

114

front retaining claw

116

rear retaining claw

118

rear retaining claw

120

Switch

122

Holding element

124

Anti-glare protection

130

safety goggles

132

Visor

132a

Holding arm

136a

Plug

168

bracket

172

Support shell

174

Latch flap

180

Upholstery material piece

190

Charging plug

192

Connector plug

194

Battery body

196

Sealing lip

196a

collar

198

Charging contact

200

Communication contact

202

Communication contact

204

magnet

206

Charging contact

208

Sealing lip

208a

collar

210

side locking lug

212

locking lug

214

Battery holder

216a

upper support arm

216b

upper support arm

218a

upper retaining hook

218b

upper retaining hook

220

Frame

222a

lower retaining hook

222b

lower retaining hook

223

Level

224

Tab

1104a

magnet

1104b

magnet

1106a

PCB

1106b

PCB

1106c

PCB

1106d

PCB

1108a

electrical contact

1108b

electrical contact

1110a

Casting compound

1110b

Casting compound

1112a

electrical contact surface

1112b

electrical contact surface

1112c

electrical contact surface

1114a

Recess

1114b

Recess

1116a

head Start

1116b

head Start

1118

Battery cell

1120

Foil cover

1122

cover

1124

Front side

1400a

Fresnel lens

1400b

Fresnel lens

1400c

Fresnel lens

1402

Straightening unit

1602

Milling

1604

drilling

1608

Conductor tracks

1610

LED element

1612

mechanical switching element

1614

additional mechanical switching element

1616

framing

1804

kink

1806

drilling

2000

Temperature display

2002

Battery level indicator

2004

On/off button

2006

LED backlight

2008

Display area

3000

Plug connection

3002

Connector connection

3002a

Connection port

4000

Helicopter LED

4002a

more helicopter LED

4002b

more helicopter LED

4004

Edge

QUOTES INCLUDED IN THE DESCRIPTION

This list of documents listed by the applicant was generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA accepts no liability for any errors or omissions.

Cited patent literature

• DE 8714490 U1 [0002]

Claims (10)

Helmet light (10) for attachment to a protective helmet, wherein the helmet light (10) comprises a control controller and a sensor unit with a backlight sensor and wherein the helmet light (10) can be switched into a plurality of operating modes and states in each of which the helmet light (10) emits light, - wherein the sensor unit is configured to capture sensor data from the backlight sensor, process it and send it to the control controller as processed backlight sensor data, - wherein the control controller is configured to receive the processed backlight sensor data and to switch the helmet light (10) between the plurality of operating modes and states based on the processed backlight sensor data. Helmet light (10) by Claim 1 , wherein the backlight sensor is arranged in the region of the lens unit (14) and detects backlight sensor data substantially in a region in front of the lens unit (14). Helmet light (10) by Claim 1 or 2 , wherein the control controller is configured to switch the helmet light (10) from an operating mode in which a high beam is active to another operating mode and/or another operating state in which a luminous range and/or intensity of the high beam is at least adjusted if it is detected based on the processed backlight sensor data that an incident backlight exceeds or falls below a threshold brightness. Helmet light (10) by Claim 3 , wherein the control controller is arranged to carry out the switching only when the incident backlight permanently exceeds or falls below the threshold brightness for a time interval Δt, wherein the time interval Δt is between 1 and 5 seconds, preferably between 2 and 3 seconds. Helmet light (10) by Claim 3 or 4 , wherein a plurality of mutually different threshold brightnesses are predefined or adjustable in the control controller, and wherein the control controller is configured to adjust the luminous range and/or intensity of the high beam when one of the plurality of mutually different threshold brightnesses is exceeded or not reached. Protective helmet (30) with a helmet light (10) according to one of the preceding claims. Method for operating a helmet light (10) attachable to a protective helmet (30), wherein the helmet light (10) comprises a control controller and a sensor unit with a backlight sensor, - wherein, by the sensor unit, sensor data from the backlight sensor is detected and processed and sent to the control controller as processed backlight sensor data, and - wherein, by the control controller, the processed backlight sensor data is received and the helmet light (10) is switched between a plurality of operating modes and states in which the helmet light (10) emits light, respectively. Procedure according to Claim 7 , wherein, by the control controller, the helmet light (10) is switched from an operating mode in which a high beam is active to another operating mode and/or another operating state in which a luminous range and/or intensity of the high beam is at least adjusted if it is detected based on the processed backlight sensor data that an incident backlight exceeds or falls below a threshold brightness. Procedure according to Claim 8 , wherein, by the control controller, the switching is only carried out when the incident backlight permanently exceeds or falls below the threshold brightness for a time interval Δt, wherein the time interval Δt is between 1 and 5 seconds, preferably between 2 and 3 seconds. Procedure according to Claim 8 or 9 , wherein a plurality of mutually different threshold brightnesses are predefined or set in the control controller, and wherein, by the control controller, the luminous range and/or intensity of the high beam is adjusted when one of the plurality of mutually different threshold brightnesses is exceeded or not reached.