Battery holder, helmet light with battery holder, and protective helmet with helmet light

Abstract

The present application relates to a battery holder (214) fixed to a protective helmet (30), the battery holder (214) comprising a frame (220) having upper and lower ends and a plurality of fixing hooks formed on the frame (220), the plurality of fixing hooks being configured to fix the battery holder (214) to the outer periphery of a helmet shell (36) of the protective helmet (30), and the plurality of fixing hooks abutting from the outer periphery of the helmet shell (36) to the inner periphery of the helmet shell (36). The present invention also relates to a helmet light (10) equipped with the battery holder (24), and a protective helmet (30) equipped with the helmet light (10).

Description

[Technical Field]

[0001] The present invention relates to a battery holder to be fixed to a protective helmet, a helmet light equipped with such a battery holder, and a protective helmet equipped with such a helmet light. [Background technology]

[0002] Various jobs, particularly those in the forestry sector, require the wearing of protective helmets. Such protective helmets are disclosed, for example, in Patent Document 1. Such protective helmets consist of a helmet shell and an interior structural assembly (wearing body). The interior structural assembly includes a subassembly to be worn on the head, and this subassembly has at least one support cage, a headband, a neckband, and means for fastening this subassembly to the helmet shell.

[0003] Such conventional protective helmets are basic helmets that can be adapted for a variety of tasks under various working conditions by changing the accessories. Such protective helmets consist of a helmet shell and an interior structural assembly. The interior structural assembly has a cross band for attaching the protective helmet to the user's head and ensuring an impact-resistant distance between the user's head and the helmet shell. The outer periphery of the helmet shell is provided with a protrusion extending to the sides and rear of the helmet shell, and the lower edge of this protrusion is provided with four recesses for fastening the cross band and further recesses for fastening additional accessories. This basic version of the protective helmet can be used as a simple, general-purpose helmet without any accessories. Accessories can be attached or removed as needed.

[0004] Helmet accessories that can be suitably attached to a protective helmet include, in particular, helmet lights that illuminate the user's work area or other area in a manner similar to a headlamp. Illuminating a work area or other area is useful not only at dawn, dusk, and after sunset, but also in areas where sunlight is blocked, such as in dim light under a tree canopy. Furthermore, helmet lights that can be fixed to a protective helmet are useful in a variety of tasks. For example, nighttime repairs of construction machinery at a construction site or maintenance work in dark, poorly lit water tunnels or under bridges can be performed more efficiently by having an appropriate means of illumination "on the person" in the form of a helmet light so that it is always available.

[0005] Such helmet lights typically generate light using electrical energy, which is stored and carried in a chemical form, such as a battery pack or a rechargeable battery pack. Since the battery pack must be electrically connected to the helmet light via a connecting cable, it must be located as fixedly on the protective helmet as possible relative to the helmet light. This makes the battery holder that houses the battery pack an important element related to the safety of the protective helmet user, and thus creates a need for a corresponding design challenge.

[0006] Therefore, an object of the present invention is to provide a battery pack, a helmet light equipped with a battery pack, and a protective helmet equipped with a helmet light, each of which can ensure the safety of the helmet wearer. [Prior art documents] [Patent documents]

[0007] [Patent Document 1] DE8714490U1 (German Utility Model Publication) Summary of the Invention [Means for solving the problem]

[0008] This is achieved by the subject matter having the features set forth in the independent claims, while the dependent claims set forth useful configurations and refinements.

[0009] The battery holder fixed to the protective helmet of the present invention includes a frame having upper and lower ends and a plurality of fixing hooks formed on the frame. The fixing hooks are configured to fix the battery holder to the outer periphery of the helmet shell of the protective helmet, and the fixing hooks abut from the outer periphery to the inner periphery of the helmet shell. By providing the fixing hooks for fixing the battery holder to the helmet shell, the battery holder can be fixed in a predetermined position on the helmet shell and can also be easily removed from the helmet shell as needed. This allows an object that strikes the protective helmet from above, such as a tree branch, to slide down along the outer surface of the protective helmet. If the battery holder gets caught in the sliding motion, the battery holder will separate from the protective helmet. This prevents the protective helmet from being torn off the head of the wearer (user) of the protective helmet or the user from receiving the full impact force of the impact object.

[0010] Advantageously, the plurality of fixing hooks may include upper fixing hooks and lower fixing hooks, and the release sides of the upper fixing hooks may face the release sides of the corresponding lower fixing hooks. Thus, when an object strikes the protective helmet from above and strikes the battery holder, the impact force of the striking object is first applied to the upper fixing hooks, releasing the engagement between the upper fixing hooks and the helmet shell and initiating separation of the battery holder from the helmet shell. At the same time, the lower fixing hooks are pushed down in the release direction by the helmet shell, thereby completely separating the battery holder from the helmet shell.

[0011] Advantageously, the release side of the upper fixing hook may be larger than the release side of the lower fixing hook, so that the force required to deflect the upper fixing hook when fixing the battery holder to the helmet shell can be kept relatively small. Furthermore, with this configuration, the force required to release the upper fixing hook can be kept relatively small, so that in an emergency, i.e., when an object hits the protective helmet from above, the battery holder can be simply and easily separated from the helmet shell.

[0012] Each of the upper fixing hooks may have a step on the side opposite the unlocking side. The step is placed on an edge of the helmet shell. This allows a vent slide displaceably attached to the helmet shell to move over the step toward the peripheral edge of the opening in the helmet shell. This allows the vent slide to block and close the opening in the helmet shell with which the upper fixing hook of the battery holder is engaged.

[0013] Furthermore, each of the upper fixing hooks may be formed on an upper fixing arm of the frame. The upper fixing arm increases flexibility during installation of the battery holder, thereby facilitating installation of the battery holder. Furthermore, due to the high flexibility, if an object strikes the helmet shell from above, the impact force of the object can be absorbed and reduced in advance by the elastic deformation of the battery holder. This increases the time until the upper fixing hooks break, resulting in a delay in the breakage of the upper fixing hooks.

[0014] Advantageously, each of the lower fixing hooks may be formed directly on the frame, so that, in the event that an upper fixing hook is already broken, the battery holder will normally fall completely detached from the helmet shell, i.e. will not be partially connected to or hanging from the helmet shell.

[0015] In one embodiment, the frame has a generally cylindrical shape, and some of the fixing hooks may be located at the upper and lower ends of the frame. Such a generally cylindrical structure of the battery holder allows the battery pack 100 having a predetermined cross section to be easily inserted into the frame 220.

[0016] Advantageously, the frame may have a tapered upper end and a tab at its lower end, the tab facing the lower end of the frame and elastically deformable outward from the frame. The tapered frame allows a battery pack inserted into the battery holder to be locked within the frame, while the tab at the lower end clamps the inserted battery pack within the frame.

[0017] A helmet light with such a battery holder and a protective helmet with such a helmet light are also described further. [Brief explanation of the drawings]

[0018] Exemplary embodiments of the invention or of some components of the invention will now be described in more detail with reference to the drawings.

[0019] [Figure 1] A three-dimensional view of a helmet light. [Figure 2A] 3D views of the helmet light from various angles. [Figure 2B] 3D views of the helmet light from various angles. [Figure 2C] 3D views of the helmet light from various angles. [Figure 2D] 3D views of the helmet light from various angles. [Figure 2E] 3D views of the helmet light from various angles. [Figure 2F] 3D views of the helmet light from various angles. [Figure 3A] An exploded three-dimensional view of a helmet light. [Figure 3B] This is a three-dimensional view of a helmet light seen from diagonally below. [Figure 3C] This is a three-dimensional view of a helmet light seen from diagonally above. [Figure 3D] This is a three-dimensional view of a helmet light seen from diagonally above. [Figure 3E] This is a three-dimensional view of a helmet light seen from diagonally below. [Figure 4A] FIG. 1 is a three-dimensional view of a lens unit of a helmet light seen from behind. [Figure 4B] FIG. 1 is a three-dimensional view of a lens unit of a helmet light seen from the front. [Figure 5A] FIG. 1 is a three-dimensional view showing the controller board of the helmet light. [Figure 5B] FIG. 1 is a three-dimensional view of the carrier element of the helmet light from above. [Figure 5C] FIG. 1 is a three-dimensional view from below of the carrier element of the helmet light. [Figure 6A] This is a top view of the helmet light controller board. [Figure 6B] FIG. 10 is a bottom view of the helmet light controller board. [Figure 7A] 1A and 1B are three-dimensional views of the ventilation slide of the protective helmet as viewed from different directions. [Figure 7B] 1A and 1B are three-dimensional views of the ventilation slide of the protective helmet as viewed from different directions. [Figure 7C] 1A and 1B are three-dimensional views of the ventilation slide of the protective helmet as viewed from different directions. [Figure 8A] 3D views of the battery pack from various directions. [Figure 8B] 3D views of the battery pack from various directions. [Figure 8C] 3D views of the battery pack from various directions. [Figure 8D]3D views of the battery pack from various directions. [Figure 8E] 3D views of the battery pack from various directions. [Figure 8F] 3D views of the battery pack from various directions. [Figure 8G] 3D views of the battery pack from various directions. [Figure 8H] 3D views of the battery pack from various directions. [Figure 8I] 3D views of the battery pack from various directions. [Figure 8J] 3D views of the battery pack from various directions. [Figure 9A] 3D views of the connector plug from various directions. [Figure 9B] 3D views of the connector plug from various directions. [Figure 9C] 3D views of the connector plug from various directions. [Figure 9D] 3D views of the connector plug from various directions. [Figure 9E] 3D views of the connector plug from various directions. [Figure 10A] 3D views of the charging plug from various angles. [Figure 10B] 3D views of the charging plug from various angles. [Figure 10C] 3D views of the charging plug from various angles. [Figure 10D] 3D views of the charging plug from various angles. [Figure 11A] FIG. 1 is a three-dimensional view showing the charging connections of the battery pack. [Figure 11B] FIG. 1 is a three-dimensional view showing the charging connections of the battery pack. [Figure 12A] 1A and 1B are three-dimensional views showing the internal structure of the battery pack from various angles. [Figure 12B] 1A and 1B are three-dimensional views showing the internal structure of the battery pack from various angles. [Figure 13A] 3D views of the battery holder from various directions. [Figure 13B] 3D views of the battery holder from various directions. [Figure 13C] 3D views of the battery holder from various directions. [Figure 13D] 3D views of the battery holder from various directions. [Figure 13E] 3D views of the battery holder from various directions. [Figure 13F] 3D views of the battery holder from various directions. [Figure 13G] 3D views of the battery holder from various directions. [Figure 13H] 3D views of the battery holder from various directions. [Figure 14A] 3D views of a helmet shell with a helmet light attached, viewed from various directions. [Figure 14B] 3D views of a helmet shell with a helmet light attached, viewed from various directions. [Figure 14C] 3D views of a helmet shell with a helmet light attached, viewed from various directions. [Figure 14D] 3D views of a helmet shell with a helmet light attached, viewed from various directions. [Figure 14E] 3D views of a helmet shell with a helmet light attached, viewed from various directions. [Figure 15] FIG. 1 is a three-dimensional view from below of a helmet shell with a helmet light attached. [Figure 16A] A detailed view from below of the helmet shell with the helmet light attached. [Figure 16B] A detailed view from below of the helmet shell with the helmet light attached. [Figure 16C]A detailed view from below of the helmet shell with the helmet light attached. [Figure 17A] 10A-10C are detailed views of the helmet shell with the battery holder attached, viewed from various directions. [Figure 17B] 10A-10C are detailed views of the helmet shell with the battery holder attached, viewed from various directions. [Figure 18] FIG. 10 is a detailed view showing the helmet shell with the battery holder containing the battery pack attached. [Figure 19] FIG. 1 is a first front view of a protective helmet with a helmet light attached thereto; [Figure 20] FIG. 2 is a second front view of the protective helmet with the helmet light attached; [Figure 21] FIG. 10 is a third front view of the protective helmet with the helmet light attached, seen from the front. [Figure 22] FIG. 1 is a detailed view from above of a protective helmet with a helmet light attached. [Figure 23A] FIG. 1 is a side cross-sectional view showing a protective helmet equipped with a helmet light. [Figure 23B] FIG. 10 is another cross-sectional side view of a protective helmet with a helmet light attached thereto. [Figure 24] FIG. 1 is an exploded view of a protective helmet with various accessories attached. [Figure 25A] FIG. 1 illustrates a graphical user interface for operating a helmet light. [Figure 25B] FIG. 1 illustrates a graphical user interface for operating a helmet light. [Figure 25C] FIG. 1 illustrates a graphical user interface for operating a helmet light. [Figure 25D] FIG. 1 illustrates a graphical user interface for operating a helmet light. [Figure 25E]FIG. 1 illustrates a graphical user interface for operating a helmet light. [Figure 25F] FIG. 1 illustrates a graphical user interface for operating a helmet light. [Figure 25G] FIG. 1 illustrates a graphical user interface for operating a helmet light. [Figure 25H] FIG. 1 illustrates a graphical user interface for operating a helmet light. [Figure 25I] FIG. 1 illustrates a graphical user interface for operating a helmet light. DETAILED DESCRIPTION OF THE INVENTION

[0020] In the following description, the same reference numerals refer to the same or similar components.

[0021] FIGS. 1 and 2A-2F are three-dimensional views of a helmet light viewed from various directions. The helmet light 10 shown in each figure includes a lens unit 14 having a glare shield 124 and a main body having a cooling element 20 and a cover element 22. As shown in FIG. 1, the cooling element 20 and the cover element 22 are disposed on opposite sides of the main body of the helmet light 10 and are fixed to each other by screws 23 that penetrate the main body. Instead of or in addition to screw fixing, the cooling element 20 and / or the cover element 22 may be adhesively fixed to the main body of the helmet light 10. Alternatively, the cooling element 20 and / or the cover element 22 may be removably fixed to the helmet light 10 using fixing elements provided on the main body of the helmet light 10. In this case, the cooling element 20 and / or the cover element 22 can be easily attached and detached from the helmet light 10. The cover element 22 can be composed of one or more parts that are firmly or loosely connected to each other. In the illustrated example, the cover element 22 is composed of a single part.

[0022] In the three-dimensional view shown in FIG. 1 , the cooling element 20 is arranged on the back side of the helmet light 10 when viewed from the left, and most of it is covered by the cover element 22. Therefore, in order to schematically show the connection between the cooling element 20 and the cover element 22 and the shape of the main body of the helmet light 10, the part of the cooling element 20 that is hidden by the main body of the helmet light 10 is shown with dashed lines in FIG. 1. The helmet light 10 has a plug connector 3000 at one lateral end thereof and a connecting plug connector 3002 at the other end thereof. The plug connector 3000 can be, for example, a USB connection type connector, in particular a USB Type-C connection type connector. Note that instead of the configuration shown in FIG. 1 in which two plug connectors are arranged at both lateral ends of the helmet light 10, a configuration in which the two plug connectors are arranged together at one lateral end of the helmet light 10 may also be used. However, the arrangement of two plug connectors at both lateral ends of the helmet light 10 is advantageous in terms of cable wiring, since the space available for mounting the helmet light 10 is limited, as will be described in detail below. As shown in FIG. 1 , the helmet light 10 has, in addition to the plug connector 3000, a connecting connector 3002a, which can be provided in addition to or instead of the connecting plug connector 3002, as needed. The connecting connector 3002a is located on the side of the helmet light 10 on which the plug connector 3000 is provided. The connecting connector 3002a is directly connected to the main body of the helmet light 10, for example, by being firmly soldered to the controller board 18 provided on the main body of the helmet light 10. The connecting plug connector 3002 and / or the connecting connector 3002a can be used, for example, to connect accessories to the helmet light 10. An example of an accessory for the helmet light 10 is another lighting element that can be freely positioned or fixed to the helmet shell 36, such as a lighting element constituting a "helicopter LED," as will be described in detail below. Another example of an accessory for the helmet light 10 is a separate lighting element that is attached to the edge of the helmet shell to provide a face light (face lighting unit).Such face lights are particularly useful in lifesaving / rescue operations, as hard hats generally cast a shadow on the user's face, which can unintentionally hinder rescue / rescue efforts by causing an already frightened person to panic if they do not recognize or do not perceive a hard hat wearer approaching them as a normal person.

[0023] The plug connector 3000 and mating plug connector 3002, as well as the mating connector 3002a, can be mounted on a printed circuit board on which other electrical components of the helmet light 10 are mounted, as will be described in more detail below as an example of a controller board 18.

[0024] The lens unit 14 is surrounded by a glare shield 124 to prevent or at least reduce the leakage of scattered light from the lens unit 14. This prevents light emitted from the lens unit 14 from directly reaching the user's eyes when the helmet light 10 is turned on, for example, and thus provides comfort to the user. The glare shield 124 may be made of, for example, rubber, plastic, GRP, metal sheet, or a mechanically insensitive material that does not transmit visible light. The glare shield 124 may be removably fixed to the lens unit 14 using a fixing element provided on the lens unit 14. This allows, for example, the glare shield 124 to be replaced if damaged. It also allows the glare shield 124 to be replaced with a glare shield 124 suitable for the intended use. For example, although not shown, the glare shield 124 may be used with another partially transparent member positioned in the direction of the illumination of the lens unit 14 to change the illumination characteristics / light intensity of the helmet light 10. Alternatively, the glare shield 124 may be firmly and permanently fixed to the helmet light 10, for example, by adhesive or fixing elements.

[0025] As described above, although not shown in FIG. 1 , the helmet light 10 may further include a face light (face lighting unit) that illuminates the user's facial area. The face lighting unit may be realized by a lighting element that is provided separately from the main body of the helmet light 10 and oriented to illuminate the user's facial area. The face lighting unit may be fixed to the inner edge of the protective helmet, similar to the helmet light 10. Alternatively, the face lighting unit may be integrated into the helmet light 10. For example, a lighting element serving as the face lighting unit may be disposed on the rear side (face side) of the lens unit 14 so as to pass through the glare shield 124 and illuminate the user's facial area with diffused light. For example, a lighting element serving as the face lighting unit may be disposed on the face side of the lens unit 14, and light emitted from the lighting element may be diffused by the glare shield 124 to illuminate the user's facial area.

[0026] As shown in Fig. 1, a connection cable 24 is connected to the plug connector 3000. As shown in Fig. 1, a connection cable 24 is connected to the plug connector 3000. One end of the connection cable 24 is connected to the plug connector 3000, and the other end is connected to the connector plug 192 (details will be described later).

[0027] The helmet light 10 can be switched into various lighting modes. Each lighting mode emits light from the helmet light 10 unless the helmet light 10 is explicitly switched off. By switching between lighting modes, various areas around the helmet light 10 (protective helmet) can be illuminated without changing the position or orientation of the helmet light 10. Examples of lighting modes for the helmet light 10 include face lighting, close-range lighting, work area lighting, long-range lighting, helicopter lighting, and position lighting. The lighting modes of the helmet light 10 can also be used / controlled in any combination, further increasing the number of different lighting modes.

[0028] Furthermore, the helmet light 10 can operate in various states in each lighting mode. For example, the illuminance, i.e., the brightness of the light emitted from the helmet light 10, can be changed. The brightness of the light emitted from the helmet light 10 can also be changed over time. Furthermore, the light color of each light-emitting element of the helmet light 10 that is the target of control can also be changed.

[0029] FIG. 2A is a three-dimensional view of the helmet light 10 as seen from above. As shown in FIG. 2A , the helmet light 10 includes the lens unit 14 having the glare shield 124, a left-side connecting plug connector 3002, a right-side connecting plug connector 3000, and in particular the cover element 22. The cover element 22 has various fastening elements for detachably fastening the helmet light 10 to a helmet shell 36 (described below). The cover element 22 has at least four fastening elements. As shown on the left side of FIG. 2A , the cover element 22 has a rear fastening hook 116, a front fastening hook 112, and a fastening element 122. As shown on the right side of FIG. 2A , the cover element 22 has a rear fastening hook 118, a front fastening hook 114, and a fastening element 122. Thus, in this embodiment, the cover element 22 has six fastening elements. However, the number of fastening elements may be greater or less than six, as long as the cover element 22 has at least four fastening elements. The front fixing hooks 112, 114, the rear fixing hooks 116, 118, and the fixing element 122 are described in further detail below. The cover element 22 can be formed from a material similar to that of the glare shield 124. The cover element 22 is preferably formed from an electrically insulating material, but this is not a requirement. As shown in the center of FIG. 2A , the helmet light 10 has an on / off switch. The helmet light 10 can be turned on and off by operating this on / off switch. Because the on / off switch cannot be operated by the user when the helmet light 10 is attached to the helmet shell 36, this on / off switch is provided as an option for turning the helmet light 10 on and off when, for example, the helmet light 10 is not attached to the helmet shell 36 and is being held by the user.

[0030] When the helmet light 10 is attached to the helmet shell 36, the cooling element 20, which can be easily seen in FIG. 2B, faces away from the helmet shell 36, i.e., toward the inside of the helmet. The cooling element 20 has cooling ribs 21 for improving heat dissipation to prevent the helmet light 10 from overheating, thereby dissipating heat generated during operation of the helmet light 10. A switch 120 is provided in the center of the cooling element 20. By operating this switch 120, the helmet light 10 can be easily turned on and off even when the helmet light 10 is attached. In addition, by operating the switch 120, the helmet light 10 can be switched from a completely switched-off state (off mode) to a kind of standby mode in which no light is emitted from the helmet light 10 but which can be controlled only using an external operating element. This standby mode is a standby state that consumes as little energy as possible, but allows the helmet light 10 to be flexibly controlled at any time. When the switch 120 is operated, an optical and / or acoustic signal is output, thereby notifying the user of the usage status of the helmet light 10 and whether the switch is on or off.

[0031] As mentioned above, the cooling element 20 and the cover element 22 form a large portion of the outer surface of the main body of the helmet light 10. This allows the cover element 22 and the cooling element 20 to perform mechanical reinforcement and protection functions. Additionally, the cooling ribs 21 of the cooling element 20 and the circumferential beads on the edges of the cooling element 20 perform additional reinforcement functions.

[0032] As shown in Fig. 2E, the lens unit 14 of the helmet light 10 has a plurality of circular lenses arranged at a distance from one another. These circular lenses emit directional light. The internal structure of the lens unit 14 having such circular lenses will be described later with reference to Figs. 4A and 4B.

[0033] 2E and 2F, the helmet light 10 has a curved shape. A plug connector 3000 and a connecting plug connector 3002 are arranged in both lateral end regions of the main body of the helmet light 10. The position on the helmet shell 36 where the helmet light 10 is attached is curved with a predetermined curvature, and the main body of the helmet light 10 is formed to curve from the central region toward both lateral end regions to fit this curvature.

[0034] FIG. 3A is an exploded three-dimensional view of the helmet light 10. In FIG. 3A, the helmet light 10 is shown in simplified form. The helmet light 10 includes a controller board 18 disposed between the cover element 22 and the cooling element 20. The controller board 18 may be formed, for example, as a printed circuit board. The controller board 18 carries the electronic components of the helmet light 10, and these electronic components are connected to each other via conductor tracks provided on the controller board 18. These electronic components include a control unit that controls the switching of various functions of the helmet light 10 (e.g., various lighting modes and operating states) and the on / off switching of the helmet light 10. A small, independent battery cell may also be provided on the controller board 18 to enable short-term emergency operation of the helmet light 10 without receiving power from the external battery pack 100. Emergency operations may include, for example, system diagnostic operations or light output for approximately 10 minutes. Furthermore, various sensor units or connections to sensor units may also be provided on the controller board. In this case, the sensor unit detects, processes, and transmits data to the control controller. The sensor unit may include an infrared sensor, an ultrasonic sensor, and / or a twilight sensor. The sensor unit may also include a backlight sensor and / or a gas sensor. The sensor unit may also include an acceleration sensor. The sensor unit may also include a body temperature sensor and / or a humidity sensor. The sensor unit may also include a head recognition sensor. The sensor unit may also include a housing temperature sensor that detects the temperature of the helmet light 10. The sensor of the sensor unit may be integrally disposed in the helmet light 10. Alternatively, the sensor of the sensor unit may be disposed as an external module, for example, in the battery pack 100 or the ventilation slide 50.

[0035] The control controller may, for example, receive the housing temperature value of the helmet light 10 detected by the sensor unit and control the helmet light to change its operating state based on the received housing temperature value. For example, the control controller may control the helmet light 10 to reduce its light output when the housing temperature value of the helmet light 10 detected by the sensor unit exceeds an allowable upper temperature threshold Ttol_max. Reducing the light output of the helmet light 10 reduces the amount of waste heat generated by the helmet light 10, thereby reducing the housing temperature value. This can prevent ignition of flammable materials in, for example, an explosive environment (an environment where flammable gas or dust is present in the air). Alternatively, the control controller may output a warning signal and turn off the helmet light 10 when the housing temperature value of the helmet light 10 detected by the sensor unit exceeds the upper temperature threshold Tmax. If the housing temperature value of the helmet light 10 does not decrease even when the light output of the helmet light 10 is reduced, the housing of the helmet light 10 may act as an "ignition spark" and cause a dust explosion or gas explosion. Therefore, it is useful to control the helmet light 10 to be turned off when the housing temperature value exceeds the upper temperature threshold Tmax. Alternatively, if the housing temperature value of the helmet light 10 detected by the sensor unit falls below the lower temperature threshold TLeuchte_min, the controller can control the switched-off helmet light 10 to slowly change to a selected operating state for a time interval Δt that is greater than the time interval actually required to switch on the light-emitting element. This can limit the amount of waste heat generated locally in the lighting element to a very low temperature. This control can also reduce the temperature gradient in the helmet light 10. This control can also reduce temperature-induced voltages generated in solder joints and / or printed circuit boards, thereby reducing the possibility of impairing the functionality of the helmet light 10.Furthermore, the controller can control the helmet light 10 to continuously increase the light output to the desired light output in the selected lighting mode during the time interval Δt, thereby reducing the temperature gradient in the helmet light 10.

[0036] If the sensor unit includes an infrared sensor, the sensor unit processes data detected by the infrared sensor and transmits the processed sensor data to the control controller. The control controller controls the helmet light 10 to switch the lighting mode and / or operating state based on the processed sensor data received from the sensor unit. The lighting mode and / or operating state is switched, for example, when a predetermined movement (gesture) of the arm of the wearer (user) of the protective helmet 30 is detected in front of the lens unit 14 based on the processed sensor data. This allows the user of the protective helmet 30 to easily control the helmet light 10. For example, the user of the protective helmet 30 can easily control the helmet light 10 even while holding a tool in their hand during work.

[0037] The infrared sensor can be disposed, for example, near the LED element 1610 on the controller board 18. In this case, the infrared sensor is disposed in an area corresponding to the lens unit 14, thereby enabling sensor data to be detected in the area in front of the lens unit 14. Furthermore, the use of an infrared sensor makes it possible to limit operation of the operation panel, thereby preventing unintended operation of the helmet light 10. The sensor unit can include an ultrasonic sensor. Similar to the infrared sensor, the ultrasonic sensor can be disposed near the LED element 1610 on the controller board 18. In this case, the ultrasonic sensor is disposed in an area corresponding to the lens unit 14, thereby enabling sensor data to be detected in the area in front of the lens unit 14. The advantages of using an infrared sensor can also be achieved when using an ultrasonic sensor. The use of an ultrasonic sensor makes it possible to limit operation of the operation panel, thereby preventing unintended operation of the helmet light 10. Furthermore, the use of an ultrasonic sensor allows operation by a user wearing special thermal protective clothing. Therefore, the control controller can control the helmet light 10 to switch the lighting mode and / or operating state when a predetermined movement (gesture) of the arm of the user of the protective helmet 30 is detected in front of the lens unit 14 based on processed sensor data obtained by processing data detected by the processed ultrasonic sensor. Instead of or in addition to the infrared and / or ultrasonic sensor, the sensor unit can include a twilight sensor. The sensor unit processes the sensor data detected by the twilight sensor and transmits it to the control controller as processed twilight data. The control controller can control the helmet light 10 to switch the lighting mode and / or operating state based on the processed twilight data received from the sensor unit. For example, if it is determined based on the processed twilight data that the brightness in the area ahead of the helmet light 10 is insufficient, the helmet light can be turned on.This enables automation of the control of the helmet light 10, in particular partial automation of the lighting of the helmet light 10. Furthermore, by arranging the twilight sensor in an area corresponding to the lens unit 14, sensor data can be detected in the area in front of the lens unit 14, i.e., the user's work area of ​​the protective helmet 30. Therefore, the controller can automatically control the operation of the helmet light 10 so that the helmet light 10 is automatically turned on only when it is determined that the brightness in the area in front of the helmet light 10 is insufficient.

[0038] If the sensor unit includes a backlight sensor, the sensor unit processes data detected by the backlight sensor and transmits it to the control controller as processed backlight sensor data. The control controller controls the helmet light 10 to switch the lighting mode and / or operating state based on the processed backlight sensor data received from the sensor unit. This allows for partial automation of the control of the helmet light 10. If light directly strikes the backlight sensor, i.e., if the user of the protective helmet 30 is illuminated by light emitted from another user's light source or helmet light, the helmet light 10 of the user of the protective helmet 30 may also shine light onto the other user, potentially blinding them. Therefore, it is desirable to reduce the light output of the helmet light 10 of the user of the protective helmet 30 at least while the backlight sensor detects the light directly striking it, preferably for several seconds thereafter. As described above, the backlight sensor is part of the sensor unit and is located in an area of ​​the controller board 18 corresponding to the lens unit 14, so the backlight sensor data is detected in the area in front of the lens unit 14. Because the helmet light 10 is typically positioned above the user's eye area, light emitted from the helmet light 10 can cause a glare effect on the user of the backlit light source when strong backlight is detected in the area forward of the lens unit 14. Such glare effect can be mitigated by reducing the light output of the helmet light 10 at least when backlight is detected in the area forward of the lens unit 14.

[0039] To mitigate glare caused by light emitted from the helmet light 10, the control controller controls the helmet light 10 to switch from a lighting mode with an active high beam to a lighting mode and / or operational state in which at least the high beam illumination direction and / or light intensity is adjusted when the processed backlight sensor data determines that the brightness of the backlight incident on the backlight sensor exceeds a predetermined brightness threshold. Reducing the glare caused by light emitted from the helmet light 10 can be achieved by turning off long-range light, such as the high beam, reducing its intensity, or changing its illumination direction, for example, toward the ground. The control controller controls the lighting mode and / or operational state to switch only when the brightness of the backlight incident on the backlight sensor continuously exceeds or falls below the predetermined brightness threshold for a time interval Δt. The time interval Δt can be 1 to 5 seconds, preferably 2 to 3 seconds. This prevents the lighting mode and / or operating state of the helmet light 10 from being changed when the light from another user's light source or helmet light accidentally hits the helmet light 10 and the other user does not experience a glare effect due to the light from the helmet light 10. Various brightness thresholds can also be preset in the controller. The controller controls to adjust the illumination area and / or light intensity of the high beam when the brightness of the backlight incident on the backlight sensor exceeds or falls below one of the various brightness thresholds. This makes it possible to properly illuminate the area in front of the user of the helmet light 10 while minimizing the glare effect on other users with other light sources or helmet lights as much as possible. The location of other users with other light sources or helmet lights can be detected, if necessary, using a passive light source such as a reflector and / or a location beacon carried by the other users. The term "user" in this specification should be interpreted very broadly and includes animals, such as dogs, especially working dogs.These dogs may become distracted if dazzled by a powerful light source, for example when engaged in tracking or searching activities, such as for wounded animals, under conditions of poor visibility.

[0040] If the sensor unit includes a gas sensor, the sensor unit processes data detected by the gas sensor and transmits it to the control controller as processed gas sensor data. The control controller controls the helmet light 10 to switch its lighting mode and / or operating state based on the processed gas sensor data received from the sensor unit. By detecting harmful gases using the gas sensor, the helmet light 10 can warn the user, thereby preventing the user from unwittingly remaining in an area contaminated by harmful gases. The gas sensor can be located on the main body of the helmet light 10, which has a sufficiently protected installation space for placing the gas sensor. The gas sensor can also be located in other locations, such as on a ventilation slide. The sensor unit can detect the concentration of CO2 and / or CO using the gas sensor. These gases are colorless and odorless and can be harmful to the user's health if present in high concentrations. The control controller controls the helmet light 10 to switch its operating state to an operating state in which a warning signal is output if the processed gas sensor data indicates a CO2 and / or CO concentration exceeding a gas threshold concentration. The warning signal can be output acoustically and / or optically. The acoustic output can be, for example, via a speaker connectable to the helmet light 10. The speaker can also be part of an input device connectable to the helmet light 10. Optical output can include, for example, changing the color of the light emitted from the helmet light 10. For example, the helmet light 10 can illuminate a work area with a red light to indicate danger. By displaying the warning signal to the user, the user can take protective action, such as moving away from the danger area. The sensor unit can also be configured to detect the concentration of flammable gas using a gas sensor. The flammable gas can be ignited by the helmet light 10 itself or a tool operated by the user. The controller controls the helmet light 10 to switch its operational state to an operational state that outputs at least one warning signal when the processed gas sensor data indicates a flammable gas concentration above a threshold concentration.The warning signal can be acoustically and / or optically output. By showing the warning signal to the user, the user can take action to protect themselves, such as moving away from the danger area. Due to the risk of fire or explosion, the helmet light 10 may be controlled to stop or at least reduce its light output after the warning signal is output. This is effective in preventing explosions or deflagration, as heat generated by the helmet light 10 and associated battery pack 100 may be sufficient to cause a fire / explosion.

[0041] If the sensor unit includes an acceleration sensor, the sensor unit processes data detected by at least one acceleration sensor and transmits the processed acceleration sensor data to the control controller. The control controller controls the helmet light 10 to switch the lighting mode and / or operating state based on the processed acceleration sensor data received from the sensor unit. The acceleration sensor data can detect changes in the user's movement trajectory, allowing the control controller to detect, for example, a user's fall using the sensor unit. In that case, the control controller can take appropriate measures. The acceleration sensor can be located on the main body of the helmet light 10, but can also be located in other positions, such as on the ventilation slide 50. Because the main body of the helmet light 10 is located inside the helmet shell, the movement of the user's head can be estimated based on changes in the user's movement trajectory. This is particularly advantageous for detecting falls from acceleration data. The sensor unit or acceleration sensor can detect acceleration in three non-parallel directions. This allows for flexible data acquisition and makes it possible to detect falls in any direction.

[0042] The controller can control the helmet light 10 to switch its operational state to one in which a location signal is output when the processed acceleration sensor data exceeds a predetermined acceleration threshold. This facilitates locating the user by outputting a location signal when a user's fall is detected, for example, due to a sudden change in acceleration in the Z direction (height). Outputting the location signal includes turning the helmet light 10 back on if it was turned off. Outputting the location signal further includes activating a location indicator element, such as one or more helicopter LEDs 4000, 4002a, and 4002b. Outputting the location signal further includes requesting an input device connected to the helmet light 10 to transmit a location signal. If the input device is a mobile phone or a device with wireless communication capabilities, outputting the location signal includes transmitting an emergency call via a wireless communication channel. The emergency call can optionally include GPS coordinates of the input device, if the input device has GPS coordinates. The helicopter LEDs 4000, 4002a, 4002b may be operated in particular as part of a helicopter light, which further improves the user's visibility from above, in particular on helicopters, cranes, etc. Helicopter lights are advantageous in all cases where the user of the helmet light needs to be seen by others engaged in work at various heights, for example working on the exterior of a building, earthmoving in an open pit, working in a tree canopy, etc.

[0043] The acceleration sensor, or data obtained from the acceleration sensor, can determine whether the user is standing (no change in the Z direction), walking (gradual change in the Z direction due to pendulum motion with each step), or running (sudden change in the Z direction). Based on this determination, the controller can control the helmet light 10 to adjust the "illumination area" according to changes in the Z direction. For example, the helmet light can be controlled to provide task lighting when standing, close-range lighting when walking, and long-range lighting or both long-range and short-range lighting when running. This can help prevent the user from falling.

[0044] If the sensor unit optionally includes a non-contact body temperature sensor, the sensor unit processes data detected by the body temperature sensor and transmits the processed body temperature sensor data to the control controller. The control controller controls the helmet light 10 to switch the lighting mode and / or operating state based on the processed body temperature sensor data received from the sensor unit. The body temperature sensor or its detection data can detect, in particular, excessive body temperature (overheating) or hypothermia of the user. This can increase user safety even if the user does not notice these conditions in a timely manner. Switching the operating state of the helmet light 10 can notify the user of a potential health hazard. This switching can also include turning on the helmet light 10. At least one body temperature sensor can be located on the main body of the helmet light 10. The main body of the helmet light 10 has a protected installation space for the sensor. In particular, the sensor unit can detect the body temperature of the user's head when the user is wearing the protective helmet 30. The body temperature sensor located on the main body of the helmet light 10 can directly monitor / measure the user's head temperature, thereby accurately understanding the user's health condition. Alternatively, a body temperature sensor can be worn directly on the user's body in the form of a heart rate monitor belt and connected to the helmet light 10 via a short-range wireless interface or the like. The controller controls the helmet light 10 to output a warning signal when the processed body temperature sensor data exceeds a predetermined body temperature threshold tmax. If this threshold is exceeded, it can be determined that the user is overheated or exhibiting signs of overheating. The warning signal can be output optically, for example, by changing the light output of the helmet light 10, or acoustically via an attached speaker. If the detected body temperature sensor data indicates that the user has already developed heatstroke and requires assistance (clear overheating is observed, or the body temperature continues to rise even after the warning signal is output, and other sensor data also indicates abnormalities), the helmet light 10 can be controlled to output an emergency signal, similar to when a user falls.The controller can also control the helmet light 10 to output a warning signal if the processed body temperature sensor data falls below a predetermined body temperature threshold tmin. If the processed body temperature sensor data does not reach this threshold, it can be determined that the user is at risk of hypothermia. The warning signal can be output optically by changing the light output of the helmet light 10, or acoustically via an provided speaker. If the detected body temperature sensor data indicates that the user is already in a state of severe hypothermia and in need of assistance (either because an obvious state of hypothermia is observed, or because the body temperature continues to drop even after the warning signal is output and other sensor data also indicates abnormalities), the helmet light 10 can be controlled to output an emergency signal, similar to when a fall occurs.

[0045] If the sensor unit includes a humidity sensor, the sensor unit processes data detected by the at least one humidity sensor and transmits the processed humidity sensor data to the control controller. The control controller controls the helmet light 10 to switch the lighting mode and / or operating state based on the processed humidity sensor data received from the sensor unit. Switching the lighting mode and / or operating state includes turning on the helmet light 10. Furthermore, the proportion of yellow in the emitted light can be increased to more effectively illuminate areas where mist or fog may occur. The at least one humidity sensor can be located in the main body of the helmet light 10. The main body of the helmet light 10 has a particularly protected installation space. The humidity sensor can also be located in other positions, such as on the ventilation slide 50.

[0046] The helmet light 10 may include a fan unit. The controller controls the fan unit to turn on or off when the processed humidity sensor data exceeds or falls below a predetermined humidity threshold. When the fan unit in the helmet light 10 is activated, it generates airflow, particularly under the helmet shell 36 of the protective helmet 30, effectively removing sweat film, improving comfort when wearing the protective helmet 30 and reducing the user's body temperature. The fan unit may be located, for example, on the main body of the helmet light 10 or on the lower edge of the helmet shell 36. Although the fan unit is not shown, it is clear to those skilled in the art how to design it to generate airflow under the helmet shell 36. The fan unit may also be located on or within the ventilation slide 50 and draw in or blow out air through the vent 53 provided therein. Power to the fan unit is supplied via the helmet light 10 or from the battery pack 100. The controller controls the fan unit to output a warning signal when the processed humidity sensor data exceeds a predetermined humidity warning threshold. This "warning level" can notify the user that the humidity in the surrounding air may soon reach a problematic level.

[0047] If the sensor unit includes a head recognition sensor, the sensor unit processes data detected by at least one head recognition sensor and transmits the processed head recognition sensor data to the control controller. The control controller controls the helmet light 10 to switch the lighting mode and / or operating state based on the processed head recognition sensor data received from the sensor unit. This allows partial automation of the control of the helmet light 10. The lighting mode and / or operating state may include switching the helmet light 10 on / off, and in particular, other operating modes controlled based on the data detected by the head recognition sensor. The head recognition sensor may be located on the main body of the helmet light 10. The main body of the helmet light 10 has a protected installation space. Furthermore, since the main body of the helmet light 10 is located inside the helmet shell of the protective helmet 30, it is automatically positioned near the user's head, making head recognition relatively easy.

[0048] The head recognition sensor includes a position sensor that detects, processes, and transmits the spatial position of the helmet light 10 to the control controller as part of the head recognition sensor data. Detecting the spatial position of the helmet light 10 allows for a rough determination of whether the user is actually wearing the protective helmet 30 or what kind of movement the user is making. For example, when a user is standing, the helmet light 10 is often oriented "substantially horizontal." If the head recognition sensor data determines that the helmet light 10 is pointing toward the ground, the control controller can automatically activate the work light of the helmet light 10. If the user tilts their head forward from a "forward-facing horizontal position" to perform an action such as performing a task in front of them, the helmet light 10 will also tilt forward. In such a situation, activation of the work light of the helmet light 10 is useful and can be automatically performed by the control controller. Similarly, if the head recognition sensor data determines that the helmet light 10 is horizontal (parallel) to the ground or sky, the control controller can also activate the high beam of the helmet light 10. The head recognition sensor may include a distance sensor that detects, processes, and transmits distance data to the control controller as part of the head recognition sensor data. The distance data may be detected, in particular, inside the helmet shell. In this configuration, if the head recognition sensor data determines that the user is actually wearing the protective helmet 30, the control controller may automatically activate the work light or another light of the helmet light 10. This allows for more useful automation of the control of the helmet light 10, contributing to improved user convenience and safety.

[0049] If the sensor unit includes a housing temperature sensor that detects the housing operating temperature of the helmet light 10, the control controller receives the detected housing operating temperature and controls the helmet light 10 to change its operating state based on the received housing operating temperature. This configuration, for example, can suppress heat generation in the helmet light 10 and maintain the detected housing operating temperature within a desired range, particularly suppressing temperature increases. For example, the control controller may control the helmet light 10 to reduce its light output when the detected housing operating temperature of the helmet light 10 exceeds an acceptable upper temperature threshold Ttol_max. This reduces the power converted to light, suppresses heat generation, and prevents further increases in the housing temperature. As another example, after outputting a warning signal, the control controller may control the helmet light 10 to turn off when the detected housing operating temperature of the helmet light 10 exceeds an upper temperature threshold Tmax. This method contributes to preventing the risk of explosion by setting the temperature threshold below the "ignition temperature," for example, 40°C. This temperature threshold can be adjusted depending on the type of gas and dust present in the ambient air and comply with statutory explosion-proof requirements. The warning signal is output optically or acoustically, as described above. The controller may further control the helmet light 10 to switch from a switched-off state to a selected lighting mode during the time interval Δt if the detected operating temperature of the helmet light's housing falls below the lower temperature threshold TLeuchte_min. Gradual heating can prevent thermal stress within the helmet light 10, particularly in the controller board and its solder joints. Furthermore, the controller may control the helmet light 10 to gradually increase its actual light output to the target light output for the selected lighting mode during the time interval Δt. Because housing cracks are more likely to occur at low temperatures than at high temperatures, it is desirable to minimize heat generation at the beginning of an operating cycle when the helmet light 10 is still relatively cool.The helmet light 10 may also include a battery pack 100 equipped with a temperature sensor that detects the battery pack operating temperature value of the battery pack 100. The control controller receives the detected battery pack operating temperature value and controls the helmet light 10 to change the operating state based on the received battery pack operating temperature value. In this manner, the control controller can take appropriate measures to maintain the temperature of the battery pack 100 within an acceptable range. The control controller can further control the electric heating unit disposed in the battery body 194 to operate when the detected battery pack operating temperature value of the battery pack 100 falls below a lower temperature threshold TAkku_min. In this manner, the discharge cycle of the battery pack 100 is maintained as normal. The control controller can control the helmet light 10 to reduce the light output when the detected battery pack operating temperature value of the battery pack 100 exceeds an acceptable upper temperature threshold TAkku_max. By reducing the light output of the helmet light 10, i.e., by reducing the brightness of the helmet light 10, the power consumption of the battery pack 100 is reduced, which reduces heat generation and therefore the temperature of the battery pack 100 (assuming a constant rate of heat dissipation to the surroundings). Such reduction is particularly advantageous in explosive environments.

[0050] The operations of the various sensors, the sensor units including these sensors, and the control controller described above can be considered as a series of operational processes executed by these components of the helmet light 10. Furthermore, it is possible to change the operation of the helmet light 10 for various uses by "reprogramming" individual or all thresholds, changing / adjusting the recognized gestures / arm movements and the functions activated thereby, etc.

[0051] The controller board 18 is primarily disposed in the main body of the helmet light 10, but as shown in FIG. 3A , its forward-facing edge protrudes from the main body of the helmet light 10. The controller board 18 is supported by the carrier element 16 over its entire surface, particularly over its entire surface, ensuring sufficient mechanical stability of the controller board 18. As shown in FIG. 3A , the edges of the controller board 18 and the carrier element 16 can be angled with respect to the central region, and the angled regions located on the sides of the controller board 18 can be provided with the plug connector 3000 and connecting plug connector 3002 already shown in FIGS. 2A to 2F (omitted in FIGS. 3A and 3B for simplicity). In FIG. 3A , the controller board 18 and the carrier element 16 continue forward to the lens unit 14, thereby connecting the lens unit 14 to the main body of the helmet light 10. The controller board 18 can be equipped with, for example, an LED element 1610 that emits visible light and is connected to a corresponding power source via electrical connecting lines on the controller board 18. The lens unit 14 includes multiple lens elements, not indicated by individual reference numerals. Each lens element corresponds to one or more LED elements 1610 on the controller board 18. The lens elements converge and concentrate the light emitted from the LED elements 1610 and direct it in a desired direction. A replaceable cover 12, for example, may be provided in front of the lens unit 14. The cover 12 is primarily intended to protect the lens unit 14 and helps prevent mechanical damage, such as scratches, because each lens element of the lens unit 14 is particularly sensitive to such damage.

[0052] The helmet light 10 may be provided with a housing temperature sensor (not shown), for example, on the controller board 18 or on the outside of the helmet light 10. This housing temperature sensor may, in particular, detect the operating temperature value of the housing of the helmet light 10.

[0053] 3B is a three-dimensional view of part of the helmet light 10, seen obliquely from below. In particular, FIG. 3B shows the cooling element 20, which is provided with cooling ribs 21 for heat dissipation and a circumferential bead for additional reinforcement. The switch 120 is also provided in the center of the cooling element 20. In the front area of ​​FIG. 3B, the cooling element 20 is provided with a recess 25, which is located in the area of ​​the plug connector 3000 arranged on the controller board 18 and protects the connecting plug from excessive mechanical loads. On the opposite side, the cooling element 20 is not shown with a recess, but a corresponding recess can also be provided in the area of ​​the connecting plug connector 3002 arranged on the opposite side.

[0054] The cooling element 20 is connected in surface contact with the carrier element 16 that covers it, so that heat generated when the helmet light 10 is in operation is transferred from the controller board 18 to the cooling element 20 via the carrier element 16, which has excellent thermal conductivity, and is then released into the surrounding environment.

[0055] Fig. 3C is another three-dimensional view of part of the helmet light 10, seen obliquely from above. Fig. 3C shows only the controller board 18, the carrier element 16 arranged below it, and the cover 12. The cover 12 covers the lens unit 14, which is normally arranged below it, and this lens unit 14 in turn covers the LED elements 1610 on the controller board 18. Although not shown in detail, through holes are provided in the central area of ​​the controller board 18. These through holes are used to screw the cooling element 20 and the cover element 22 together when assembling the helmet light 10. These through holes also pass through to the carrier element 16.

[0056] Fig. 3D is a three-dimensional view seen obliquely from above showing further components of the helmet light 10. Compared to Fig. 3C, Fig. 3D additionally shows a state in which the cover element 22 is attached to the controller board 18. Although not shown in detail, an on / off switch is provided on the top surface of the cover element 22 shown in Fig. 3D, and faces the helmet shell 36 when the helmet light 10 is attached.

[0057] FIG. 3E is a three-dimensional view of the components of the helmet light 10, seen obliquely from below. In FIG. 3E, the cover element 22 is located on the underside of the helmet light 10 and is only partially visible because it is behind the observer. The cooling element 20 is also omitted, leaving the carrier element 16 located underneath visible. The controller board 18 is mostly covered by the carrier element 16, so only a portion of its edges is visible. The plug connector 3000 and the connecting plug connector 3002 are visible in the side-sloping areas of the controller board 18. The through-holes in the controller board 18 and the subsequent through-holes in the carrier element 16 are also visible. This view also shows the mounting through-holes in the front-sloping area. In the center, the switch 120 is located on the carrier element 16. The switch 120 is directly arranged on the carrier element 16 and is surrounded by the cooling element 20 in a "half-moon" shape when the cooling element 20 is installed. The switch 120 is provided in particular in the form of a foil switch, in particular a foil-like connecting wire which is laid around the edge of the carrier element 16 and connects the switch to a corresponding connection on the controller board 18 .

[0058] FIG. 4A is a three-dimensional view of the lens unit 14 of the helmet light 10 as viewed from the rear, and FIG. 4B is a three-dimensional view of the lens unit 14 of the helmet light 10 as viewed from the front. The lens unit 14 has multiple directional units 1402 arranged adjacent to one another, and FIG. 4B shows seven directional units 1402 arranged adjacent to one another. Each directional unit 1402 guides light within the lens unit 14. Each directional unit 1402 is formed in a truncated cone shape. Each directional unit 1402 corresponds to an individual LED element 1610, and light emitted from each LED element 1610 passes through and is guided from the rear to the front of the lens unit 14. At this time, it is desirable to minimize lateral diffusion of light (scattered light) as much as possible. The truncated cone-shaped directional unit 1402 maintains the directionality of the light, and natural refraction at the boundary between the directional unit and the surrounding space can be expected to refract and guide some of the light emitted from each LED element 1610 back inward. If necessary, applying a reflective coating to the side surfaces of the directional unit 1402 may be considered. On the front surface of the lens unit 14, light emitted from each directional unit 1402 first enters the area of ​​the corresponding Fresnel lens 1400a, 1400b, or 1400c. Each directional unit 1402 is paired with a corresponding Fresnel lens 1400a, 1400b, or 1400c, and the light is guided to that Fresnel lens. The Fresnel lenses 1400a, 1400b, and 1400c have different shapes, and in particular, the three Fresnel lenses 1400c arranged in the center have a main irradiation direction different from the pairs of Fresnel lenses 1400b and 1400a arranged around them. The lens unit 14 can increase or decrease the number of pairs of directional units 1402 and Fresnel lenses 1400a, 1400b, and 1400c as needed, and the main irradiation direction of each Fresnel lens 1400a, 1400b, and 1400c can also be adjusted depending on the application.For example, the main illumination directions of the Fresnel lenses 1400a, 1400b, and 1400c can be designed so that the Fresnel lens 1400a serves as an outer work light lens, the Fresnel lens 1400b serves as an inner work light lens, and the Fresnel lens 1400c serves as a front light or high beam lens. The lens unit 14 can be formed as an injection-molded part made of transparent plastic with an appropriate refractive index. Each of the Fresnel lenses 1400a, 1400b, and 1400c can also function as a light diffuser.

[0059] In various illumination modes of the helmet light 10, the Fresnel lenses 1400a, 1400b, and 1400c can be used in various combinations to project light, thereby achieving the desired cone of light for each operating mode, thereby effectively illuminating various spatial regions around the helmet light 10, such as a work area, a near area, and a far area.

[0060] The user's work area is defined, for example, as the spatial region directly in front of the user. The central region of the illuminated work area, i.e., the area directly illuminated by the cone of light emitted from Fresnel lenses 1400a, 1400b, and 1400c, extends from approximately 1 meter to approximately 4 meters in front of the user, assuming, for example, that the user's protective helmet 30 is 1.8 meters tall and oriented "parallel" to the ground. The lateral opening angle of the central region of the illuminated work area is approximately 160°, resulting in a wide spread of light from the helmet light 10 to the left and right, directly encompassing a wide area within the cone of light. In this way, the main illumination direction and cone shape of the light emitted from the "active" Fresnel lens can be easily determined, ensuring that the central region of the work area is directly illuminated. Furthermore, the work area can be defined in this manner, and the exact boundaries of the cone of light can be adjusted depending on the actual application. The shape and boundaries of the light cone are determined by each Fresnel lens 1400a, 1400b, 1400c used, each with its own primary illumination direction and possibly "asymmetric" illumination angle. This type of work area illumination allows for broad, bright illumination of a small area in front of the user of the helmet light 10, improving work efficiency while also reducing the glare effect on other workers working around the user.

[0061] The near-distance area following the work area may, for example, partially overlap with the work area. It is assumed that the area is illuminated, particularly when the user wearing the protective helmet 30 is walking. The central area of ​​the illuminated near-distance area, i.e., the area directly illuminated by the light cone emitted from the helmet light 10, extends from approximately 2 m to approximately 6 m in front of the user, assuming, for example, that the height of the protective helmet worn by the user is 1.8 m and the protective helmet 30 is oriented "parallel" to the ground. The horizontal opening angle of the central area of ​​the illuminated near-distance area is approximately 120°, resulting in an area directly included within the light cone that is narrower than the work area in the left and right directions. In this way, the main illumination direction and the shape of the light cone can be easily identified again, and the central area of ​​the near-distance area is directly illuminated. The work area is located closer than the near-distance area, and both are clearly defined. The shape and area of ​​the light cone are determined by the Fresnel lenses 1400a, 1400b, 1400c used, each with its own primary illumination direction and possibly "asymmetric" illumination angle. This close-range illumination allows for bright illumination of a small area in front of the user of the helmet light 10, ensuring early recognition of obstacles while walking, while minimizing the glare effect on other workers working around the user.

[0062] The user's far-distance zone is defined as a spatial region extending far beyond the near-distance zone in front of the user. The far-distance zone may partially overlap the work zone, for example, and is particularly likely to be illuminated when the user wearing the helmet 30 is running or "looking into the distance," i.e., lifting their head and gazing into the distance. This condition can be detected, for example, using a position sensor. The central region of the illuminated far-distance zone, i.e., the area directly illuminated by the cone of light emitted from the helmet light 10, extends from approximately 5 m in front of the user to infinity, assuming, for example, that the height of the helmet worn by the user is 1.8 m and the helmet is oriented "parallel" to the ground. Because the illumination angle may be directed upward, the central region of the illuminated far-distance zone technically has no end and may reach the sky. However, to reduce glare, the light emitted from the helmet light 10 can be adjusted to strike the ground, for example, 100 m away. The horizontal opening angle of the central region of the illuminated far-distance area is approximately 60° or less, resulting in a relatively narrow area directly to the left and right of the helmet light. In this manner, the main direction of light illuminating the central region of the far-distance area and the shape of the light cone can be easily identified, providing a well-defined far-distance area. The shape and characteristics of the light cone are determined by the Fresnel lens used, each of which has a main direction of light and, in some cases, an "asymmetric" illumination angle. Illuminating this far-distance area illuminates an area far in front of the user of the helmet light 10, enabling more reliable and earlier recognition of more distant objects.

[0063] The lens unit 14 may further have an area at the lower edge of its rear surface that allows the light emitted by the corresponding LED element 1610 to be diffused and emitted in the direction of the user's face. This diffused light may constitute the main part of the face illumination.

[0064] The lens unit 14 includes a plurality of Fresnel lenses 1400a, 1400b, and 1400c arranged adjacent to one another. The exact number of Fresnel lenses 1400a, 1400b, and 1400c can be adjusted as needed. The Fresnel lenses 1400a, 1400b, and 1400c can also be divided into a first subset and a second subset. The Fresnel lenses 1400a, 1400b, and 1400c of the first subset emit light when it is necessary to illuminate a user's work area of ​​the protective helmet 30 while the user is wearing the protective helmet 30. On the other hand, the Fresnel lenses 1400a, 1400b, and 1400c of the second subset emit light when it is necessary to illuminate a user's far-distance area of ​​the protective helmet 30 while the user is wearing the protective helmet 30. In this manner, different areas can be illuminated by the helmet light 10 without moving the helmet light 10 itself or the protective helmet 30 to which the helmet light 10 is attached. Some of the Fresnel lenses 1400a, 1400b, and 1400c also function as diffusers to counteract glare, particularly in components of the helmet light 10 used to illuminate the user's face. For example, when a user is wearing the protective helmet 30, light can be emitted through some of the Fresnel lenses 1400a, 1400b, and 1400c of the first subset to illuminate the user's near-distance area, while simultaneously emitting light through some of the Fresnel lenses 1400a, 1400b, and 1400c of the second subset. In this manner, a gradual and gentle transition of illumination between the work area and the far-distance area can be achieved, for example, illuminating a near-distance area that partially overlaps the work area and the far-distance area. The glare shield provided around the lens unit 14 is provided to prevent the light emitted from the lens unit 14 from unintentionally shining directly onto the user's face, particularly the user's eyes. The lens unit 14 can be formed from a transparent material that has the least attenuation of yellow light in the visible frequency range.Additionally, a removable cover 12 is provided in front of the lens unit 14 as part of the lens unit 14. This cover 12 may also be formed of a transparent material that minimizes attenuation of yellow light in the visible frequency range. In this manner, the yellow component of the light emitted from the helmet light 10 is less attenuated, making the emitted light appear relatively more yellow. Yellow visible light is less likely to scatter than other colors of visible light, making it more effective, particularly in foggy conditions. As described above, the multiple Fresnel lenses 1400a, 1400b, and 1400c may each have a different main illumination direction, thereby focusing the light emitted from the helmet light 10 in different directions and illuminating various areas around the user of the helmet light 10. Some of the multiple Fresnel lenses 1400a, 1400b, and 1400c strongly focus the emitted light, while others function as scattering lenses, diffusing the light emitted from the LED element 1610 to achieve less spot-like illumination. This allows for different "brightness levels" of illumination depending on the application, and in particular allows for relatively diffuse illumination that reduces glare effects.

[0065] FIG. 5A illustrates the controller board 18 of the helmet light 10. As mentioned above, the controller board 18 is provided with conductor tracks 1608, which are omitted in FIG. 5A for simplicity. Only some of the electronic components in the central region of the controller board 18 are shown. In particular, a mechanical switch element 1612 for operating the helmet light 10 is provided in the center. The side regions of the controller board 18 are inclined relative to the central region, and the controller board 18 is provided with notches 1602 to achieve the desired inclination. A plurality of holes 1604 are provided throughout the controller board 18, which can be used, for example, to fasten the cooling element 20 or the cover element 22 during assembly. LED elements 1610 are provided in the inclined regions. The number and characteristics of the LED elements 1610 can be changed. For example, if the lens unit 14 is configured with "more" Fresnel lenses 1400a, 1400b, and 1400c, the number of LED elements 1610 can be increased accordingly. Furthermore, the LED elements 1610, or at least some of them, may be LED elements 1610 with adjustable light emission color. In addition to the illustrated LED elements 1610 corresponding to Fresnel lenses 1400a, 1400b, and 1400c of lens unit 14, other LED elements (not shown) may also be provided on controller board 18, which emit light toward the lower edge of controller board 18 or lens unit 14, and the light is emitted as diffused light, which can form the main part of the face illumination.

[0066] FIG. 5B is a three-dimensional view of the carrier element 16 of the helmet light 10 as seen from above and the front, and FIG. 5C is a three-dimensional view of the carrier element 16 as seen from below and the rear. The carrier element 16 has a bent portion 1804 that defines the central region and the inclined side regions of the carrier element 16, and a plurality of holes 1806 at positions corresponding to the holes 1604 in the controller board 18. A large recess is provided in the central region of the carrier element 16, allowing a mechanical switch element to be directly mounted on the controller board 18 and operated via the carrier element 16. However, this recess is optional; the switch mounted on this side of the controller board 18 or the helmet light 10 can also be formed as a foil switch without a recess. In this case, connecting wires are routed to the controller board 18 through the periphery of the carrier element 16. The carrier element 16 is, for example, machined or punched from an aluminum plate and bent into a predetermined shape. The carrier element 16 can be glued to the controller board 18, in which case the controller board 18 and the carrier element 16 become one unit, and heat generated from the controller board 18 can be easily dissipated through the carrier element 16.

[0067] FIG. 6A is a top view of the controller board 18 of the helmet light 10, and FIG. 6B is a bottom view of the controller board 18 of the helmet light 10. The controller board 18 shown in FIGS. 6A and 6B has a plug connector 3000 in one laterally inclined region and a mating plug connector 3002 in the opposite laterally inclined region. Also, in FIG. 6A , a mechanical switch element 1612 is provided on the controller board 18 as an example, and an LED element 1610 is provided in an inclined region that is not visible to the observer. This is also true for the edge of a frame 1616, which is detailed in FIG. 6B . In FIG. 6B , another mechanical switch element 1614 is provided on the other side of the controller board 18, surrounded by a frame 1616. This frame 1616 functions, on the one hand, as an assembly aid for the carrier element 16 (centering function in cooperation with the central recess of the carrier element 16) and, on the other hand, protects the another mechanical switch element 1614 from excessive mechanical force. The frame 1616 may also enclose other electronic components on the controller board 18, such as capacitors and / or resistors, to protect them from mechanical forces. In another embodiment, the side of the controller board 18 shown in FIG. 6B may not include the additional mechanical switch element 1614, in which case the corresponding carrier element 16 may be designed without a central recess. In this case, a foil switch, for example, may be provided, with its connection wires routed from the controller board 18 along the edge of the carrier element 16 onto the opposite side of the carrier element 16 from the controller board 18, thereby achieving the functionality of the additional mechanical switch element 1614 in FIG. 6B . Similarly, the mechanical switch element 1612 shown in FIG. 6A may be replaced with, for example, a foil switch or another switching element.

[0068] 7A, 7B, and 7C are views showing the ventilation slide 50 of the protective helmet 30 from various directions. FIG. 7A is a view of the ventilation slide 50 from above, FIG. 7B is a side view of the ventilation slide 50, and FIG. 7C is a view of the ventilation slide 50 from diagonally behind. The ventilation slide 50 is typically displaceably fixed to the helmet shell 36 of the protective helmet 30, for example, by clipping using a detent device. A detent protrusion of the detent device can be disposed, for example, on the ventilation slide 50 and disposed within a channel provided in the helmet shell 36 of the protective helmet 30, so that the ventilation slide 50 and the detent protrusion are movable / displaceable relative to the protective helmet 30. As a result, the ventilation openings 53 shown in FIGS. 7A to 7C can be slid to a position that is aligned with or offset from the corresponding opening in the helmet shell 36 of the protective helmet 30. At a position offset from the opening of the helmet shell 36, the ventilation opening 53 is covered by the material of the helmet shell 36 and is in a closed state, and at the other position, i.e., the position aligned with the opening, the ventilation opening 53 is in an open state, allowing air exchange between the interior of the helmet shell 36 and the external space above the helmet shell 36. The ventilation slide 50 shown in FIGS. 7A to 7C is provided with a plurality of helicopter LEDs 4000, 4002a, 4002b in the center in addition to the ventilation opening 53. When the ventilation slide 50 is attached to the helmet shell 36 and the helmet shell 36 is worn by a user as part of the protective helmet 30, the helicopter LEDs 4002a, 4002b are positioned substantially facing upward when the user is standing upright, making it easy to identify the user's position from above in the dark. Unlike the other two helicopter LEDs 4002a and 4002b, the helicopter LED 4000 is disposed at an angle behind the edge 4004, and therefore the illumination direction of the helicopter LED 4000 is also angled, unlike the other helicopter LEDs 4002a and 4002b. With this structure, when the ventilation slide 50 is worn by a user as part of the protective helmet 30, the helicopter LED 4000 can identify the user's position from above even when the user is in a forward-leaning position or lying down (for example, after a fall).In the case of an upright user, the helicopter LED 4000 can also function as a "position light" that illuminates the rear. If necessary, additional LEDs can be provided on the ventilation slide 50, for example, to enable lateral location of a user wearing a protective helmet 30 equipped with such a ventilation slide 50. Additional LEDs of different, easily distinguishable colors can be provided on the sides of the ventilation slide 50 to roughly indicate the user's orientation or gaze direction. For example, when wearing the protective helmet 30, a first LED located on the left side can emit a first color, and a second LED located on the right side can emit a second color different from the first color. This allows a distant observer, even in the dark, to see whether the left or right side of the wearer of the protective helmet 30 is facing the observer. This allows the approximate gaze direction of the wearer of the protective helmet 30 to be estimated.

[0069] The helicopter LEDs 4000, 4002a and 4002b arranged on the ventilation slide 50 can be electrically connected to the helmet light 10, for example via electrical connection wires connected to the helmet light 10 at the connecting plug connector 3002 or the connecting connector 3002a detailed in FIG. 1.

[0070] At least one battery cell can be disposed inside the ventilation slide 50, which is not visible. This allows the battery cell to be positioned securely and protected, and in particular, it is possible to reliably prevent the battery cell from accidentally peeling off or getting caught on an obstacle. The ventilation slide 50 may further include a curved ventilation slide bottom portion, which is not visible from the viewing angle shown in the figure, which essentially constitutes the inside of the ventilation slide, and whose edge abuts the outer edge of the inner surface of the ventilation slide to form a space for disposing at least one battery cell inside the ventilation slide 50. This allows the battery to be enclosed inside the ventilation slide 50, providing better protection for the battery.

[0071] The vent slide 50 may further include electrical connections for connecting at least one battery cell to an electrical load and / or power source. The electrical connections allow for standardized connections between the battery cells in the vent slide 50 and the helmet light 10 or other electrical equipment, similar to the connections for the battery pack 100 described below. The electrical connections may be located on the outer lower edge of the vent slide for easier access and electrical connection.

[0072] The electrical connection can be displaceably oriented and positioned in a groove in the helmet shell 36 in conjunction with at least one detent protrusion, thereby allowing the connection cable 24 to be routed completely along the underside of the helmet shell 36, eliminating any exposed cable loops that could compromise the safety of the user. The electrical connection can also be displaceably oriented and positioned in another groove in the helmet shell 36, parallel to the at least one detent protrusion, again allowing the connection cable 24 to be routed completely along the underside of the helmet shell 36, eliminating any exposed cable loops that could compromise the safety of the user.

[0073] The electrical connection may also be provided with magnets and electrical contacts, providing similar benefits to the components in the connector plug 192 described below. In particular, the magnets attract the plug connection components into the correct position, facilitating blind connection of the connector plug to the battery cell. Also, separate from the electrical connection, another electrical connection may be provided that interacts with the existing electrical connection. The other electrical connection may be easily accessible by being located on the outer lower edge of the vent slide, allowing for easy connection of a charging device to the battery cell.

[0074] Alternatively, the separate electrical connection may comprise a magnet and electrical contacts, which facilitates blind connection of the battery pack charging plug, as the magnet attracts the plug connection components into position.

[0075] 8A-8I are three-dimensional views of the battery pack 100 from various directions. These views are partially simplified to avoid unnecessary details interfering with visibility. FIG. 8A shows the battery pack 100 in an inactive state. The battery pack 100 shown in FIG. 8A includes a battery body 194 having a substantially elongated cubic shape, the edges of which are chamfered as shown in FIG. 8A. Alternatively, the edges may be rounded. In FIG. 8A, the display / operation element 102 in an inactive state is provided on one side of the battery body 194. The connector plug 192, also shown in FIG. 1, is provided in the lower region of the battery pack 100. The battery pack 100 can be connected to the helmet light 10 via the connector plug 192. In FIG. 8A, the battery pack 100 is shown in an inactive state, so the display / operation element 102 is blank. However, the display / operation element 102 can be used to turn on and off individual display elements on the display / operation element 102. In this case, the display / operation element 102 is "labeled" even when not energized, making it possible to identify which parts are operation elements.

[0076] Fig. 8B is a view showing the side opposite to the display / operation element 102 in Fig. 8A, i.e., the back surface of the battery pack 100. Fig. 8B shows the back surface of the battery pack 100, which can have various structures as needed.

[0077] FIG. 8C shows the battery pack 100 in an activated state. The display / operation elements 102 in FIG. 8A, not shown separately here, can display various information to the user when the battery pack 100 is activated. The display / operation elements 102 can, for example, graphically display a temperature display element 2000, a battery charge level display element 2002, and an on / off switch 2004, optionally using an LED backlight 2006. For this purpose, the display / operation elements 102 can be provided with a display area 2008, below which the on / off switch 2004, particularly as a foil switch, can be arranged. Thus, by operating the on / off switch 2004, for example, the battery pack 100 or the helmet light 10 connected thereto can be switched on and off. The temperature display element 2000 graphically displays, in particular, the temperature of the battery pack 100, which is important because the capacity and power performance of the battery pack 100 vary with temperature. The display area 2008 can, of course, also graphically display other information related to the helmet light 10 or the battery pack 100. For example, when the battery pack 100 is connected to the helmet light 10 via the connector plug 192, the display area 2008 can graphically display an error message for the helmet light 10. In FIG. 8C , the charging plug 190 is also provided below the connector plug 192. The charging plug 190 is connected to the battery pack 100 via the connector plug 192 as shown in FIG. 8C , or can be connected directly to the battery pack 100 without the connector plug 192. The LED backlight 2006, shown with diagonal lines around the on / off switch 2004 in FIG. 8C , can also provide the user with a “rear lighting function” if desired. This is because the placement of the battery pack 100 attached to the protective helmet 30 enables the function of illuminating the rear. Alternatively or additionally, one or more red LEDs can be independently disposed on the housing of the battery body 194.

[0078] FIG. 8D shows the battery pack 100 from the same perspective as FIG. 8C . However, while FIG. 8C shows an activated state, FIG. 8D shows a different activated state. In FIG. 8C , the LED backlight 2006 is activated, as indicated by the diagonal lines. In FIG. 8D , the LED backlight 2006 is not activated, as indicated by the absence of diagonal lines. Similarly, in the area of ​​the battery charge level display element 2002, diagonal lines visually indicate the current charge level of the battery pack 100. The temperature display element 2000 can visually indicate the temperature of the battery pack 100, for example, by changing color or by other suitable methods. Alternatively, the temperature display element 2000 can directly display the temperature of the battery pack 100 numerically, near or in place of the symbol shown in FIG. 8D . The on / off switch 2004 illustrated in FIGS. 8C and 8D can provide a variety of functions. For example, the on / off switch 2004 can switch the helmet light 10 connected to the battery pack 100 on and off. When the helmet light 10 is not connected to the battery pack 100, the on / off switch 2004 can switch the battery pack 100 itself to a different operating state, such as providing the function of displaying some of the information displayable in the display area 2008 or turning the battery charge level display element 2002 on and off. The change in function provided by the on / off switch 2004 can be made depending on the plugs connected to the battery pack 100, i.e., the charging plug 190 and the connector plug 192, and the internal logic circuit of the battery pack 100 determines which plug is connected to the battery pack 100 based on the voltage measured at the connection contacts of the battery pack 100, which will be described later. Due to the special design of the charging plug 190 and the connector plug 192, the charging plug 190 and the connector plug 192 can be connected to the battery pack 100 at the same time, thereby allowing multiple batteries to 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.

[0079] In addition to the helmet light 10, which can be switched between multiple lighting modes and operating states, the helmet light system can also include an input device equipped with a transceiver module and an additional transceiver module. The input device is connected to the helmet light 10 via the transceiver module and the additional transceiver module in a bidirectional communication manner. This not only allows the helmet light 10 to be controlled from the input device, but also allows the input device to receive operation information from the helmet light 10 when connected to the helmet light 10. In this way, the input device can be positioned anywhere as an operating unit for the helmet light 10, particularly within the user's field of vision, making operation of the helmet light system easier. The transceiver module and the additional transceiver module can be either wireless or wired. Bidirectional communication between the helmet light 10 and the input device can be established via a common communication protocol. Using a common communication protocol allows for more complex helmet light system control beyond simple on / off control by opening and closing an electrical circuit. The control of the helmet light system can be designed with great flexibility.

[0080] The two-way communication used can be protected by encryption, thereby preventing unintended external operation of an input device optionally connected to the helmet light 10 of the helmet light system. Such security is particularly useful in situations where multiple helmet light systems are used with their respective input devices in close proximity. In this case, a password may be required to enhance connection security. The operational information received by the input device may also include status information of the helmet light system. The input device can display or output such status information of the helmet light system, thereby making operation of the helmet light system easier. The helmet light 10 of the helmet light system can also be connected to another input device while already connected to an input device. In this case, the helmet light 10 can be configured to be controlled preferentially by the newly connected input device. This allows, for example, a work supervisor or a monitoring system installed on-site to prioritize operation, such as turning on a camera, helicopter light, or position light if the helmet light system has such functions, allowing centralized management of these functions. Similarly, a higher-level administrator can restrict the ability to turn off specific operating functions. A helmet light system including at least the helmet light 10 with a control controller that can switch between multiple lighting modes and operating states can also include a camera unit operatively connected to the control controller. The control controller can activate the connected camera unit when the helmet light 10 of the helmet light system is activated. It is also possible to activate the camera unit even when the helmet light system is in standby mode and not yet emitting light, which allows automatic recording of the operations and field of view performed by the user of the helmet light system, and in particular prevents the user from forgetting to record.

[0081] The camera unit can store the captured video internally, enabling long-term archiving. Alternatively, the camera unit can transmit the captured video to the helmet light 10, for example, for storage in a memory built into the helmet light 10. This method also enables long-term archiving. Preferably, the control controller transmits the video captured by the camera unit as operational information to an external storage device connectable to the helmet light system. This allows for a virtually unlimited recording period. The external storage device can be accessed by a third party, particularly for the purpose of visually displaying the video. For example, a third party may review the video and provide instructions to the user regarding the problem in order to assist the user of the helmet light system in the event of a problem. For this purpose, the helmet light system may include a headset that allows the user to communicate with the third party providing assistance. This communication can be performed, for example, via a mobile wireless connection, and the helmet light system is connected to an input device that provides a mobile wireless connection, such as a mobile phone. Furthermore, the control controller can adjust the shooting direction of the camera unit depending on the lighting mode and / or operating state of the helmet light 10. This can improve the quality of the video captured by the camera. In particular, the shooting direction and the brightness during shooting can be appropriately adjusted.

[0082] The controller may also control the camera unit to adjust the dynamic focal length (zoom) depending on the lighting mode and / or operating state of the helmet light, thereby improving the image capture quality of the camera. This can be achieved, for example, by adjusting the zoom to widen or narrow the viewing angle.

[0083] The characteristics of the helmet light system described above are also generally applicable and realizable to a method for operating a helmet light system, which method can be performed by a controller for controlling the helmet light.

[0084] 8E shows the battery pack 100 from the rear, and unlike FIG. 8B, a charging plug 190 is also connected to the battery pack 100 in addition to the connector plug 192. The function of the charging plug 190 will be described later.

[0085] Figures 8F and 8G are three-dimensional detailed views of battery pack 100. Figure 8F shows a cross section of the top of battery pack 100, and Figure 8G shows a cross section of the side of battery pack 100. The top side is provided with a pair of detent protrusions 212. The sides of battery pack 100 are provided with lateral detent protrusions 210. When lateral detent protrusions 210 are provided on one side, it is preferable to provide a corresponding lateral detent protrusion on the opposite side. The detent protrusions 212 and lateral detent protrusions 210 (and possibly corresponding opposite lateral detent protrusions) can cooperate with a battery holder 214, described below, to secure the battery pack 100 in the battery holder 214 to the protective helmet 30. The detent protrusions 212 and lateral detent protrusions 210 are only shown in Figures 8F and 8G, but may be present on all battery packs 100 shown in the other figures.

[0086] FIGS. 8H, 8I, and 8J show the battery pack 100 from different angles when the plug is not connected. The battery pack 100 shown in FIG. 8H is in a switched-off state, so nothing is displayed in the display area 2008. However, even when the battery pack 100 is not powered, the display area 2008 can display at least the on / off switch 2004, for example, in the form of a transparent film image. The bottom of the battery pack 100 is provided with an electrical contact surface 1112c on the end surface 1124 of the battery body 194. A notched recess 1114a is also provided to align the connector plug 192 or charging plug 190 and prevent the plug from being laterally removed from the battery pack 100 when attached. FIG. 8J shows the battery pack 100 from another angle to more clearly show the recess 1114a on the end surface 1124 of the battery body 194. 8I shows the battery pack 100 with the end face opposite end face 1124 visible, which may be completely smooth, for example. However, if necessary, connecting elements such as electrical contacts, guide elements or additional operating elements may also be arranged on this opposite end face.

[0087] 9A, 9B, and 9C are three-dimensional views of the connector plug 19 from various directions. FIGS. 9A and 9C show the connection side of the connector plug 192, which has the electrical contacts 1108a. This connection side has a protrusion 1116a that mates with the recess 1114a shown in FIG. 8J and functions as a guide element to assist in positioning the connector plug 192 when attaching it to the battery pack 100. The protrusion 1116a cooperates with the recess 1114a on the battery pack 100 side to align the connector plug 192 with the battery pack 100. This allows for a blind connection between the battery pack 100 and the connector plug 192. FIG. 9B shows the connector plug 192 from the side opposite the side on which the electrical contacts 1108a are provided.

[0088] The electrical contacts 1108a include individual pin contacts. These pin contacts can be designed to be compressible, for example, like a telescope, and in particular can be prestressed to maintain the pin contacts in an extended state. In this way, when connecting the connector plug 192 and the battery pack 100, the pins do not bend when the electrical contacts 1108a press against the corresponding electrical contact surfaces 1112c (which can be formed as smooth or flat surfaces), and the contact pressure on the pins ensures reliable electrical contact. The individual pin contacts can have, for example, spring-like elements to achieve the prestress. However, alternative designs are known to those skilled in the art. Such a configuration also allows the plug to be laterally removed from the battery pack.

[0089] 9B, a recess 1114b is provided on the surface opposite to the electrical contact 1108a, i.e., the back surface of the connector plug 192. Furthermore, an electrical contact surface 1112a is also provided, and the electrical contact surface 1112a functions to electrically connect the connector plug 192 and the charging plug 190.

[0090] The entire interior of the connector plug 192 may be sealed by the casting material 1110a. The casting material 1110a forms the housing of the connector plug 192. Alternatively, housing shells that are closely connected to each other may be used to achieve the same functionality as the casting material 1110a, particularly fluid tightness. Connecting the housing shells to each other has advantages regarding the replaceability or manageability of individual parts inside the connector plug 192, which also leads to improved environmental compatibility of the helmet light 10 as a whole.

[0091] By using various combinations of the recesses 1114a, 1114b and the protrusions 1116a, 1116b, a simple mating support structure for plug connection can be realized. This structure does not prevent easy separation even when a pulling force is applied to the connector plug 192, and at the same time, when no pulling force is applied, the electrical contacts closed by plug connection can remain safely and correctly connected to each other. When the protrusions and recesses are arranged asymmetrically on the contact surface, a simple anti-rotation mechanism can be realized.

[0092] 9D and 9E show an example of the internal structure of a connector plug 192, showing two views from substantially opposite directions, i.e., the front and back of the internal configuration. For simplicity, the cable connections of the connector plug 192 extending from the connector plug 192 to the outside are omitted. A PCB 1106a with known electrical contacts 1108a is located inside the connector plug 192, and the PCB 1106a is covered by a casting material 1110a or a housing with equivalent functionality. An electrical contact surface 1112a is located on the opposite side. Both the electrical contacts 1108a and the electrical contact surface 1112a extend through the casting material to the surface of the connector plug 192, allowing electrical contact with other components at either location. Two magnets 1104a are located on the lateral regions of the PCB 1106a. The magnet 1104a can interact with a corresponding component on the battery pack 100 or the charging plug 190 to prevent polarity reversal of the electrical connection during connection, serving as an additional safety measure. Furthermore, the magnet 1104a, together with a corresponding component on the battery pack 100, automatically pulls the connector plug 192 to the correct position, ensuring that the connector plug 192 is securely held in place on the battery pack 100 even when a mechanical load is applied in the connection direction.

[0093] This connection and coupling mechanism allows the entire cable loop of the connection cable 24 to be released even if a user wearing the protective helmet 30 equipped with the helmet light device makes an inadvertent movement. When the pulling force applied to the caught cable loop exceeds the holding force of the magnets 204, 1104a, 1104b, the connector plug 192 automatically detaches from the battery pack 100, simultaneously releasing the cable loop. Furthermore, because the magnets 204, 1104a, 1104b attract the two components of the plug connection to the correct position, the connection between the connector plug 192 and the battery pack 100 is facilitated, greatly simplifying blind connections.

[0094] FIGS. 10A and 10B are three-dimensional views of the charging plug 190 viewed from various directions. The charging plug 190 shown in FIGS. 10A and 10B has a protrusion 1116b, similar to the connector plug 192 shown in FIGS. 9D and 9E. As shown in FIG. 10B, an electrical contact 1108b is provided on the same side of the charging plug 190 as the protrusion 1116b. Similar to the connector plug 192 shown in FIGS. 9D and 9E, the housing of the charging plug 190 is formed from a casting material 1110b, thereby achieving a fluid-tight structure within the individual housing elements, particularly the housing shell. As shown in FIG. 10A, unlike the connector plug 192 shown in FIGS. 9D and 9E, the surface of the charging plug 190 opposite the electrical contact 1108B does not have an electrical contact surface. The combination of convex portion 1116b and concave portion 1114b can prevent connector plug 192 from easily separating from charging plug 190 when a pulling force is applied to connector plug 192. Furthermore, the combination of convex portion 1116b and concave portion 1114b can realize a simple connection means that can reliably maintain a properly connected state of the electrical contacts that are closed by plug connection when no pulling force is applied to connector plug 192.

[0095] In this case, the protrusion 1116b and the recess 1114b may be configured to have asymmetric shapes, preferably at one edge of each connecting surface, thereby achieving a simple anti-rotation function.

[0096] 10C and 10D show the internal structure of charging plug 190 viewed from opposite directions, i.e., the internal structure viewed from the front and the internal structure viewed from the rear. As shown in Fig. 10C and 10D, a PCB 1106b is disposed inside charging plug 190. An electrical contact surface 1112b, an electrical contact 1108b, and a magnet 1104b are disposed on PCB 1106b, similar to the connector plug 192 shown in Fig. 8D and 8E.

[0097] 10C and 10D is similar to the configuration of PCB 1106a shown in FIGS. 9D and 9E. Because PCB 1106b is associated with charging plug 190, PCB 1106b may have a different configuration with respect to the illustrated electrical contact surfaces 1112b and electrical contacts 1108b, such as reducing the number of electrical contact pins in electrical contact 1108b. This is because charging plug 190 is typically installed last or only temporarily connected to battery pack 100, and connector plug 192 for "connecting" electrical contacts 1108b of charging plug 190 to battery pack 100 is already secured to battery pack 100. Thus, for example, PCB 1106b and PCB 1106a may have identical configurations, and may reduce the number of electrical connections to the exterior surface of charging plug 190, if desired. This allows the same PCB to be used for charging plug 190 and connector plug 192, reducing the number of different parts, for example if the only difference is the assembly having electrical components such as electrical contacts 1108a and 1108b.

[0098] 11A and 11B are three-dimensional views illustrating the charging connection of the battery pack 100. A portion of the battery body 194 of the battery pack 100 is shown at the bottom of FIGS. 11A and 11B. As shown in FIG. 11A, a connector plug 192 is attached to the upper end of the battery body 194. The connector plug 192 has a sealing lip 196 that protrudes radially inward toward the longitudinal central axis of the battery body 194. The sealing lip 196 is located axially below a protruding collar 196a of the connector plug 192. The sealing lip 196 serves to establish a sealed, i.e., fluid-tight, connection between the connector plug 192 attached to the battery body 194 and the charging plug 190 (not shown in FIG. 11A ). This is important because water contact with the electrical connection between the connector plug 192 and the charging plug 190 can corrode the electrical connection. 9A to 9C does not have such a collar 196a and a sealing lip 196, it should be noted that such a collar 196a and a sealing lip 196 can be added in a simple manner. Also, the collar 196a and the sealing lip 196 may be provided on the charging plug 190 instead of the connector plug 192. In this case, the electrical contacts 1108b of the charging plug 190 that protrude beyond the plane of the connector plug can be protected from mechanical damage by the collar 196a.

[0099] As shown in FIG. 11A , the battery body 194 of the battery pack 100 further includes charging contacts 198 and communication contacts 200. The charging contacts 198 and communication contacts 200 are arranged on the surface of the connector plug 192 surrounded by the seal lip 196. This arrangement of the charging contacts 198 and communication contacts 200 prevents the charging plug 190 (not shown) from rotating. It should be understood that this arrangement of the charging contacts 198 and communication contacts 200 is just one example. The charging contacts 198 and communication contacts 200 may be subdivided. In addition to the charging contacts 198 and communication contacts 200 shown in FIG. 11A , other contacts may be provided on the surface of the connector plug 192 surrounded by the seal lip 196. If the electrical contact surface 1112a of the charging plug 190 in the connector plug 192 is configured to be rotatably fixed, such rotatable fixation can be easily achieved, for example, by locating half of the charging contacts 198 and the communication contacts 200 inside the connector plug 192. The connection surfaces of the battery pack 100 and the connector plug 192 shown in Figures 11A and 11B do not have any protrusions or recesses for providing anti-rotation protection as described in Figures 8 to 10. However, such protrusions or recesses can be added in a simple manner.

[0100] FIG. 11B shows the upper part of the battery body 194 of the battery pack 100, excluding the connector plug 192. Similar to the free end of the connector plug 192, the upper part of the battery body 194 has a collar 208a disposed in the axial direction of the battery body 194 and a seal lip 208 disposed inside the collar 208a and surrounding the end face of the battery body 194. An electrical contact surface having a communication contact 202 and an electrical connection contact 206 is provided on the end face of the battery body 194. The electrical connection contact 206 can be used both to supply electrical energy to the connected helmet light 10 and to charge the battery pack 100. The communication contacts 200, 202, the electrical connection contact 206, and the charging contact 198 are formed in a concave shape on the end face of the battery body 194. In other words, these contacts are located below the outward-facing surface of the housing of the battery body 194 (the end face of the battery body 194). This configuration is an example, and all or at least some of the contacts may be configured to be flush with the outward facing surface of the housing of the battery main body 194. The sealing lip 208 and collar 208a may also be provided on the connector plug 192.

[0101] In addition, a magnet 204 is provided on the end face of the battery body 194, which allows the connector plug 192 to be fixed at a desired connection position on the end face of the battery body 194. Similar to the seal lip 196 provided on the connector plug 192, the seal lip 208 ensures a waterproof electrical connection between the battery body 194 and the connected connector plug 192 or the charging plug 190 (when the charging plug 190 is directly connected to the battery body 194 to charge the battery pack 100). In FIG. 11B , the magnet 204 is provided on the end face of the battery body 194. However, to prevent corrosion of the magnet 204, the magnet 204 may be disposed within a protective exterior case of the battery body 194, i.e., within the housing of the battery body 194. Note that the location of the magnet 204 is optional. However, when the magnet 204 is positioned, by appropriately selecting the magnetic pole facing away from the battery body 194, not only can the plug (connector plug 192 or charging plug 190) connected to the battery body 194 be fixed in the desired position, but also, if the plug (connector plug 192 or charging plug 190) connected to the battery body 194 has a magnet positioned in the appropriate direction, an anti-rotation function can be provided.

[0102] 12A and 12B are diagrams showing the internal structure of the battery pack 100 as viewed from various directions. Two battery cells 1118 are shown in FIGS. 12A and 12B. These battery cells 1118 have a conventional cylindrical shape extending in the axial direction. As shown in FIGS. 12A and 12B, a PCB 1106d is disposed at one end of the battery cell 1118, and the PCB 1106d is covered with a cover 1122. The cover 1122 is made of, for example, a metal plate and is electrically insulated from the PCB 1106d. The PCB 1106d has electrical contact surfaces, as shown in FIG. 11B, arranged or configured differently from those in FIG. 11B.

[0103] In addition to PCB 1106d, another PCB 1106c is disposed on the upward-facing surface of battery cell 1118. A foil cover 1120 is provided on PCB 1106c, which serves both key and display functions for battery pack 100. The key and display functions of foil cover 1120 have already been described with reference to FIGS. 8C and 8D. The components shown in FIG. 12B are disposed within the housing of battery body 194 to form, for example, battery pack 100 (including charging plug 190 and connector plug 192, not shown) shown in a miniature in the upper right corner of FIG. 12B. Of course, the external shape of battery pack 100 can vary and need not exactly match the external shape shown in a miniature in the upper right corner of FIG. 12B.

[0104] A battery pack temperature sensor may be disposed inside or on the battery pack 100. The battery pack temperature sensor may detect the battery pack operating temperature of the battery pack, and the detected battery pack operating temperature may be transmitted to, for example, the control controller of the helmet light 10. Based on the received battery pack temperature, the control controller of the helmet light 10 may change the operating state of the helmet light 10, for example, to maintain the battery pack 100 within an acceptable temperature range. The battery pack 100 may further include an electric heating unit that is controllable by the control controller of the helmet light 10 based on the battery pack operating temperature detected by the battery pack temperature sensor. For example, the control controller of the helmet light 10 may turn on the electric heating unit when the battery pack operating temperature detected by the battery pack temperature sensor falls below a lower temperature threshold TAkku_min. Naturally, the electric heating unit may be turned off when the battery pack operating temperature detected by the battery pack temperature sensor exceeds a lower temperature threshold TAkku_min. The controller of the helmet light 10 controls the helmet light 10 to reduce the light output of the helmet light 10 when the battery pack operating temperature detected by the battery pack temperature sensor exceeds the allowable upper temperature threshold TAkku_max. Reducing the light output, i.e., reducing the brightness of the helmet light 10, reduces the power consumed by the battery pack 100, thereby reducing waste heat and lowering the temperature of the battery pack 100. In this case, it is assumed that the rate at which waste heat is released into the environment is constant. This is advantageous, for example, in environments where there is a risk of explosion.

[0105] 13A to 13H are three-dimensional views of the battery holder 214 as viewed from various directions. The battery holder 214, at least a portion of which is shown in each figure, includes a frame 220 into which the aforementioned battery pack 100 can be axially inserted. For this purpose, the frame 220 of the battery holder 214 has a generally cylindrical structure with a rectangular bottom and rounded edges. As shown in FIG. 13A , one axial end face of the frame 220 is narrowed, so the battery pack 100 cannot be inserted or removed from the frame 220 through this end face. On the other hand, the other axial end face of the frame 220 has a cross-section that is not substantially narrower than the rest of the frame 220, so the battery pack 100 can be inserted or removed from this end face. This generally cylindrical structure of the frame 220 of the battery holder 214 allows the battery pack 100, having a predetermined cross-section, to be easily inserted into the frame 220. The battery pack 100 can be fixed to the frame 220 of the battery holder 214 by elastic tabs 224. Due to the tapered cross-section of the frame 220, the leading end portion of the battery pack 100 inserted into the battery holder 214 can be locked within the frame 220, and at the same time, the trailing end portion of the battery pack 100 snaps into engagement with the elastic tabs 224 to be fixed within the frame 220. The frame 220 of the battery holder 214 has an opening through which at least a portion of the battery pack 100 is visible. Therefore, the battery pack 100 is visible through the opening in the frame 220 of the battery holder 214. With this configuration, the battery pack 100 housed in the frame 220 is not thermally insulated from the surrounding environment, ensuring sufficient heat dissipation from the battery pack 100 during the charging / discharging process.

[0106] The frame 220 of the battery holder 214 is provided with upper fixing arms 216a, 216b. The upper fixing arms 216a, 216b are provided with upper fixing hooks 218a, 218b at their respective tips. The upper fixing hooks 218a, 218b serve to fix the battery holder 214 to the helmet shell 36. The upper fixing hooks 218a, 218b have steps 223. The function of the steps 223 will be described later. The frame 220 of the battery holder 214 is also provided with lower fixing hooks 222a, 222b. The upper fixing hooks 218a, 218b and the upper fixing hooks 218a, 218b cooperate with each other to securely fix the battery holder 214 to the helmet shell 36. The upper fastening hooks 218a, 218b and the interaction of the upper fastening hooks 218a, 218b with the helmet shell 36 will be described in detail below.

[0107] The configuration of the battery holder 214 shown in Figures 13A to 13H serves to ensure the safety of the user of the protective helmet. The battery holder 214 can be fixed to a predetermined position on the helmet shell 36 by the upper fixing hooks 218a, 218b and the upper fixing hooks 218a, 218b, and can also be easily removed from the helmet shell 36 as needed. An object that strikes the protective helmet 30 from above, such as a tree branch, slides down along the outer surface of the protective helmet 30. If the object gets caught on the battery holder 214 in the process, the battery holder 214 separates from the protective helmet 30. This prevents the protective helmet 30 from being torn off the head of the wearer (user) of the protective helmet 30, and prevents the user from receiving the full impact force of the impact object.

[0108] The unlocking sides of the upper fixing hooks 218a, 218b (the sides that are unlocked from the helmet shell 36) are oriented so as to face the same direction as the unlocking sides of the lower fixing hooks 222a, 222b. As a result, when an object collides with the protective helmet 30 from above and collides with the battery holder 214, the impact force of the colliding object is first applied to the upper fixing hooks 218a, 218b, which releases the lock between the upper fixing hooks 218a, 218b and the helmet shell 36, and separation of the battery holder 214 from the helmet shell 36 begins. At the same time, the lower fixing hooks 222a, 222b are pressed down in the unlocking direction by the helmet shell 36, which causes the battery holder 214 to be completely separated from the helmet shell 36. As shown in the figure, the release sides of the upper fixing hooks 218a, 218b are larger than the release sides of the lower fixing hooks 222a, 222b, and therefore the force required to deflect the upper fixing hooks 218a, 218b when fixing the battery holder 214 to the helmet shell 36 can be kept relatively small. This makes it possible to easily fix the battery holder 214 to the helmet shell 36. Furthermore, with this configuration, the force required for the release sides of the upper fixing hooks 218a, 218b can be kept relatively small, and therefore the battery holder 214 can be simply and easily separated from the helmet shell 36 in an emergency, i.e., when an object hits the protective helmet 30 from above.

[0109] FIG. 14A is a front view showing a helmet shell 36 to which a helmet light 10 is attached. The lens unit 14 of the helmet light 10 is also shown in FIG. 14A. Also shown in FIG. 14A are some of the fixing elements of the helmet light 10 for attaching the helmet light 10 to the helmet shell 36. When attaching the helmet light 10 to the helmet shell 36, fixing elements in the form of the front fixing hooks 112, 114, for example, as shown in FIG. 2A or 2C, are hooked into notches / grooves 58 provided in the front edge 56 of the helmet shell 36. This is possible because the front edge 56 of the helmet shell 36 has a predetermined brim width (depth) and has a surface on which the notches / grooves 58 can be cut out. The two front fixing hooks 112, 114 of the helmet light 10 are hooked into the notches / grooves 58 provided in the helmet shell 36 when the helmet light 10 is attached to the helmet shell 36. For this purpose, if the front fixing hooks 112, 114 are more elastic than the helmet shell 36, elastic deformation occurs in the front fixing hooks 112, 114 of the helmet shell 36 when the helmet light 10 is pressed against the helmet shell 36. Then, when the helmet light 10 reaches the fixed position, the elastic deformation is released and the front fixing hooks 112, 114 snap into the notches / grooves 58 of the front edge 56. Alternatively, if the notches / grooves 58 of the helmet shell 36 are more elastic than the front fixing hooks 112, 114, elastic deformation when attaching the helmet light 10 to the helmet shell 36 occurs at the notches / grooves 58 of the helmet shell 36, and the front fixing hooks 112, 114 remain substantially dimensionally stable.

[0110] Fig. 14B is a detailed view showing the helmet shell 36 to which the helmet light 10 is attached. Fig. 14B is a view from a different direction than Fig. 14A, showing the helmet light 10 and the inside of the helmet shell 36 as seen from "below." Fig. 14B shows the switch 120, glare shield 124, fixing elements 122 provided on the left and right sides of the cover element 22, and the cooling element 20 having cooling ribs and a circumferential bead in the helmet light 10.

[0111] The cover element 22 has a curved shape. Fixing elements 122 provided on the left and right side portions of the cover element 22 prevent the helmet light 10 from displacing laterally (left and right) of the helmet shell 36, and can firmly fix the helmet light 10 to the center position of the helmet shell 36. As described above, the helmet light 10 is attached to the helmet shell 36 by cooperation of the front fixing hooks 112, 114 and rear fixing hooks 116, 118 of the helmet light 10, which are not shown in FIG. 14B , and the rear fixing hooks 116, 118 are hooked onto the reinforcing ribs 62 provided on the inside of the helmet shell 36.

[0112] FIG. 14C is a top view of a portion of the helmet shell 36. FIG. 14D is a diagonal bottom view of a portion of the helmet shell with a helmet light attached. FIG. 14C shows the front edge 56 of the helmet shell 36. As shown in FIG. 14C, the top surface of the helmet shell 36 is provided with a contoured structure that serves to reinforce the helmet shell 36. The interaction between the contoured structure on the top surface of the helmet shell 36 and the reinforcing rib 62 on the inside of the helmet shell 36 improves the mechanical stability of the helmet shell 36. FIG. 14D shows the front fixing hooks 112, 114 of the helmet light 10 hooked into the notch / groove 58 in the front edge 56 of the helmet shell 36. The notch / groove 58 is provided with a web 110 that limits the displacement of the front fixing hooks 112, 114 within the notch / groove 58, as an element to assist in positioning the helmet light 10.

[0113] 14E is a detailed view of a portion of the helmet shell 36 to which the helmet light 10 is attached, seen from diagonally below. Fig. 14E shows the helmet light 10, the glare shield 124, the front fixing hook 112, one of the two fixing elements 122 of the cover element 22, the switch 120, the cooling element 20 having a cooling rib and a circumferential bead, the plug connector 3000, and the rear fixing hooks 116, 118 hooked onto the reinforcing rib 62. When attaching the helmet light 10 to the helmet shell 36, first, the rear fixing hooks 116, 118 of the helmet light 10 are hooked onto the reinforcing rib 62 of the helmet shell 36. Next, the helmet light 10 is pressed obliquely upward toward the front edge 56 of the helmet shell 36 to elastically deform the front fixing hooks 112, 114 and / or the helmet shell 36, and then the front fixing hooks 112, 114 snap into the corresponding notches / grooves 58 of the front edge 56. The fixing elements 122 of the cover element 22 form a pincer-like structure with the front fixing hooks 112, 114, thereby firmly fixing the helmet light 10 at the center position of the helmet shell 36. In an embodiment not shown, instead of hooking the front fixing hooks 112, 114 into the notches / grooves 58, the front fixing hooks 112, 114 may be hooked into an internal structure provided on the inside of the helmet shell 36. In this case, such an internal structure is provided closer to the front edge 56 than the internal structure in the form of the reinforcing rib 62 that hooks the rear fixing hooks 116, 118. The reinforcing rib 62 serves to reinforce the helmet shell 36, similar to the structure provided on the upper surface of the helmet shell 36 in Fig. 14C. A branch-like extension 64 extending from the reinforcing rib 62 is provided on the inside of the helmet shell 36. For example, the branch-like extension 64 limits the position of the rear fixing hooks 116, 118 when the rear fixing hooks 116, 118 of the helmet light 10 are hooked onto the reinforcing rib 62, thereby contributing to the positioning of the helmet light 10 during and after attachment to the helmet shell 36.

[0114] FIG. 15 is a three-dimensional overall view of the helmet shell 36 to which the helmet light 10 is attached, viewed from below. FIG. 15 also shows a support cage 42, a component of the protective helmet 30 (described in detail below), inside the helmet shell 36. FIG. 15 also shows a tension unit 48 for adjusting the size of the support cage 42 to the size of the user's head when wearing and removing the support cage 42. As shown on the right side of FIG. 15, the helmet light 10 is attached to the "front" region of the helmet shell 36. The face protector 32 is pivotally and displaceably attached to the front region of the helmet shell 36 via an arc-shaped structure (not shown in detail in FIG. 15). On the left side of FIG. 15, corresponding to the "rear" region of the helmet shell 36, a battery holder 214 for accommodating the battery pack 100 is shown. The helmet light 10 is connected to the battery pack 100 housed in the battery holder 214 via a connection cable 24. As described in detail with reference to FIG. 1, the connection cable 24 can be fixedly or detachably attached to the helmet light 10. 1 is arranged on the helmet light 10 on the side opposite to the connection side of the connection cable 24, and the connection cable 28 is connected to this connection plug connector 3002. The connection plug connector 3002 and the connection cable 28 are used to connect a "helicopter light", described in detail above, to the helmet light 10. The battery holder 214, shown in the rear region of the helmet shell 36, is attached via its upper fixing hooks 218a, 218b to an opening formed in the helmet shell 36. The lower fixing hooks 222a, 222b of the battery holder 214 are covered by another element of the protective helmet 30.

[0115] 16A to 16C are detailed views of a helmet shell 36 to which a helmet light 10 is attached, as seen from below. The various components of the helmet light 10 shown in the drawings have already been described with reference to the drawings. In addition to the helmet light 10 and the helmet shell 36, the protective helmet 30 also includes protective goggles 130. The protective goggles 130 are rotatably attached to the helmet shell 36. This allows the protective goggles 130 to be rotatably displaced to a use position to protect the eyes of a user wearing the protective helmet 30, and to a standby position inside the helmet shell 36 when not in use. The helmet light 10 is disposed between the protective goggles 130 and the helmet shell 36. Specifically, the helmet light 10 is disposed in a gap that normally remains between the protective goggles 130 and the helmet shell 36 when the protective goggles 130 are rotatably displaced to a standby position inside the helmet shell 36.

[0116] In addition to the protective goggles 130, the protective helmet 30 further includes a support cage 42 disposed "inside" the helmet shell 36. That is, from the outside to the inside, the helmet shell 36, helmet light 10, protective goggles 130, and support cage 42 are arranged in this order.

[0117] 17A and 17B are detailed views of the helmet shell 36 to which the battery holder 214 is attached, viewed from various directions. The battery holder 214 does not house the battery pack 100. The helmet shell 36 has an opening corresponding to the ventilation opening 53 provided in the ventilation slide 50 exemplarily described with reference to FIGS. 7A to 7C. The ventilation slide 50 is displaceably attached to the helmet shell 36. The ventilation slide 50 can be displaced so that the ventilation opening 53 is aligned with the opening of the helmet shell 36 (in this state, the opening of the helmet shell 36 is in an open state). Alternatively, the ventilation slide 50 can be displaced so that the portion of the ventilation slide 50 other than the ventilation opening 53 blocks at least most of the opening of the helmet shell 36 (in this state, the opening of the helmet shell 36 is in a closed state). The opening in the helmet shell 36 and the ventilation hole 53 in the ventilation slide 50 are arranged symmetrically with respect to a plane of symmetry extending from the rear side of the helmet shell 36 (the side where the battery holder 214 is attached) to the front side (the side where the helmet light 10 is attached).

[0118] 17A shows the vent hole 53 of the ventilation slide 50 in an open state with the battery holder 214 attached to the helmet shell 36. Fig. 17B shows the vent hole 53 of the ventilation slide 50 in a closed state with the battery holder 214 attached to the helmet shell 36, with most of the opening of the helmet shell 36 being blocked by the ventilation slide 50.

[0119] The upper fixing hooks 218a, 218b of the battery holder 214 are inserted into the opening of the helmet shell 36 through the ventilation opening 53 until the step 223 of the battery holder 214 rests on the peripheral edge of the ventilation opening 53 of the ventilation slide 50, and engage with the rear lower edge of the helmet shell 36 at the opening. At the same time or thereafter, the lower fixing hooks 222a, 222b of the battery holder 214 are pushed past the rear lower edge of the helmet shell 36. As a result, the lower fixing hooks 222a, 222b engage with the rear lower edge due to the elasticity of the material of the battery holder 214, which allows a predetermined elastic deformation, particularly in the region of the upper fixing arms 216a, 216b and the frame 220 of the battery holder 214. Note that other procedures for attaching the battery holder 214 to the helmet shell 36 may also be used.

[0120] 17A , first, the lower fixing hooks 222a and 222b of the battery holder 214 are hooked onto the lower edge of the helmet shell 36, and then the battery holder 214 is pressed forward / upward to insert the upper fixing hooks 218a and 218b of the battery holder 214 into the opening of the helmet shell 36 through the ventilation opening 53 of the ventilation slide 50. This state is shown in FIG. 17A . In the state shown in FIG. 17A , the upper fixing hook 218a is not engaged with the lower edge of the opening of the helmet shell 36. When the pressure on the battery holder 214 is released, the elastic deformation of the battery holder 214 is released, and the upper fixing hooks 218a and 218b are engaged with the edge of the opening of the helmet shell 36. At this time, the step 223 of the battery holder 214 maintains the displacement of the ventilation slide 50. This allows the ventilation slide 50 to be displaced so that the opening in the helmet shell 36 is blocked and closed by the ventilation slide 50 .

[0121] If an object collides with the helmet shell 36 or the battery holder 214 from above, the impact force of the object can be absorbed and reduced by the elastic deformation of the upper fixing arms 216a, 216b of the battery holder 214. If the upper fixing hooks 218a, 218b are broken due to excessive elastic deformation, the battery holder 214 will completely separate from the helmet shell 36 and fall downward. In other words, the battery holder 214 will not be in a state where it is partially connected to the helmet shell 36 or where it is hanging from the helmet shell 36.

[0122] The step 223 of the battery holder 214 is placed on the peripheral edge of the opening of the helmet shell 36. This allows the ventilation slide 50, which is displaceably attached to the helmet shell 36, to move beyond the step 223 and displace in the direction of the peripheral edge of the opening of the helmet shell 36. This allows the ventilation slide 50 to block and close the opening of the helmet shell 36 with which the upper fixing hooks 218a, 218b of the battery holder 214 are engaged.

[0123] As shown in FIG. 17B, the LEDs shown in FIGS. 7A to 7C are arranged on both sides of the edge 4004 of the ventilation slide 50. That is, two helicopter LEDs 4000 and 4002a, which have different light emission directions, are arranged on both sides of the edge 4004. The light emission directions of the two helicopter LEDs 4000 and 4002a shown in FIG. 17B are set so that, for example, when the wearer (user) of the protective helmet 30 is standing upright, the helicopter LED 4000 functions as a "tail light," and the helicopter LED 4002a emits light upward so as to be visible from above. Note that when the wearer of the protective helmet 30 is facing downward, the helicopter LED 4000 emits light upward. If necessary, another LED having a light emission direction, for example, a "horizontal" direction, may be provided.

[0124] FIG. 18 is a detailed view showing the helmet shell 36 to which the battery holder 214 accommodating the battery pack 100 is attached. FIG. 18 shows the rear region of the helmet shell 36. As shown in FIG. 18, two lower fixing hooks 222a, 222b are arranged on the frame of the battery holder 214. These hooks are engaged with the lower rear edge of the helmet shell 36. A tensioning unit 48 is arranged below the helmet shell 36. Details of the tensioning unit 48 were described above in relation to the support cage 42. The connecting cable 24 extends from the inside of the helmet shell 36 to the battery holder 214 and establishes a connection between the helmet light 10 attached to the front region of the helmet shell 36 and the battery pack 100 accommodated in the battery holder 214 via a connector plug 192 (not shown). The battery pack 100 is held in the frame of the battery holder 214 by elastic tabs 224 provided on the frame of the battery holder 214.

[0125] FIG. 19 is a first front view of the protective helmet 30 with the helmet light 10 attached. FIG. 20 is a second front view of the protective helmet 30 with the helmet light 10 attached. FIG. 21 is a third front view of the protective helmet 30 with the helmet light 10 attached. As shown in FIG. 19, the lens unit 14 of the helmet light 10 faces forward. Furthermore, FIG. 19 shows the front fixing hooks 112, 114 engaged with the notch / groove 58. The protective helmet 30 includes a face protector 32 pivotally coupled to the helmet shell 36. The face protector 32 is composed of a metal grid and a frame that reinforces the metal grid. When pivoted downward, the face protector 32 can protect the face of a user 26 wearing the protective helmet 30. The face protector 32 may be made of a material such as polycarbonate or a plastic grid. FIG. 20 illustrates the protective function of the protective helmet 30 for the user 26. FIG. 20 shows a state in which the face protection device 32 is rotated downward relative to the helmet shell 36 and positioned in the viewing direction of the user 26 of the protective helmet 30. FIG. 20 also shows a state in which the protective goggles 130 are rotated downward relative to the helmet shell 36 and positioned in the viewing direction of the user 26 of the protective helmet 30. FIG. 21 shows a state in which the face protection device 32 is rotated upward relative to the helmet shell 36 of the protective helmet 30, similar to the state shown in FIG. 19. In the state shown in FIG. 21, the protective goggles 130 are positioned in the viewing direction of the user 26 of the protective helmet 30, similar to the state shown in FIG. 20. The role of the protective goggles 130 is, of course, to protect the eyes of the user 26 from dust and dirt.

[0126] The material of the protective goggles 130 is selected to suit the visual capabilities of the user 26. This allows the protective goggles 130, which are pivotally mounted on the helmet shell 36, to serve as an aid to the user's 26's vision.

[0127] Fig. 22 is a detailed view of the protective helmet 30 to which the helmet light 10 is attached, seen from above. Fig. 22 shows a state in which the face protector 32 has been rotated upward relative to the helmet shell 36. Fig. 22 shows the front edge 56 of the helmet shell 36. 22, the notch / groove 58 shown in FIG. 21 is not visible because it is hidden under the helmet shell 36. The face protector 32 is located above the helmet light 10. Thus, the face protector 32 can protect the helmet light 10, as well as the facial area of ​​the user 26 of the protective helmet 30, from external physical influences.

[0128] A protective helmet 30 equipped with various accessories, particularly for forestry use, is shown in side views in Figures 23A and 23B and in an exploded view (partial cross-section) in Figure 24. Figure 24 particularly shows the inside of a helmet shell 36. The protective helmet 30 includes a face protector 32 and ear protectors 34. The protective helmet 30 further includes the helmet shell 36 and an interior structural assembly 40. The interior structural assembly 40 includes a support cage 42, a headband 44, and a neckband 46. The neckband 46 includes a tensioning unit 48. A ventilation slide 50 is arranged on the outside of the helmet shell 36, and is capable of opening and closing an opening 52 formed in the helmet shell 36.

[0129] The interior structural assembly 40 has three fixing arms 54 formed as spacers. Only two fixing arms 54 are shown in FIG. 24 . The three fixing arms 54 function as a means for fixing the interior structural assembly 40 to the helmet shell 36 at three points. Removably fastening slots are provided in the rear region of the helmet shell 36 to secure the fixing arms 54 extending longitudinally of the helmet shell 36 to the helmet shell 36. The dimensions and arrangement of the helmet shell 36 and the fixing arms 54 are determined so as to provide a space between the interior structural assembly 40 and the helmet shell 36 to accommodate the helmet light 10, associated wiring, the earmuffs 35a of the ear protection 34, and other helmet accessories, as well as attachments for at least the face protection 32 and the ear protection 34. Other helmet accessories include the tensioning unit 48 of the neckband 46 described above.

[0130] A brief description follows of the helmet shell 36, the interior structural assembly 40, their attachment to the helmet shell 36, and the helmet accessories, including the ear protection 34, face protection 32, their attachments, and the tensioning unit 48. The helmet shell 36 is formed as a one-piece molded plastic part. Suitable plastic materials for the helmet shell 36 include, for example, ABS.

[0131] The front portion of the helmet shell 36 protrudes forward to some extent so as to function as a helmet brim above the eyes of the user 26. The outer surface of the front portion of the helmet shell 36 is formed with a slope that rises toward the rear at a predetermined, uniform angle to prevent any portion from getting caught on obstacles such as tree branches. Reinforcing ribs 62 extending in the width direction of the protective helmet 30 are formed in the front and central portions of the inner surface of the helmet shell 36. Another reinforcing rib extending in the longitudinal direction of the protective helmet 30 is also formed so as to cross the reinforcing rib 62 and pass through the central portion of the inner surface of the helmet shell 36. In the central portion of the inner surface of the helmet shell 36, the reinforcing rib 62 is adjacent to a slightly recessed region in which a pair of openings 52 is formed. In this recessed area, the two front engagement protrusions (protruding downward toward the inside of the helmet) of the ventilation slide 50 respectively engage with the two front guide slots of the helmet shell 36, and the two rear engagement protrusions 70 of the ventilation slide 50 respectively engage with the two rear guide slots of the helmet shell 36, thereby slidably attaching the ventilation slide 50 to the outer surface of the helmet shell 36. The ventilation slide 50 has a ventilation opening 53 corresponding to the opening 52 of the helmet shell 36 (FIG. 24). In the open position, the ventilation opening 53 of the ventilation slide 50 is positioned so as to be aligned above the opening 52 of the helmet shell 36, and in the closed position, the ventilation opening 53 is positioned offset from the opening 52 so that the opening 52 is blocked by the ventilation slide 50. The lower edges of the helmet shell 36 are formed so as to protrude laterally and downwardly in the temple area and the occipital area, respectively. As a result, the space 60 formed between the interior structure assembly 40 and the helmet shell 36 is expanded downward in the temple and occipital regions, making it easier to position the attachments for face protection and ear protection inside the helmet shell 36 and to accommodate the earmuff members 35a in the space between the helmet shell 36 and the support cage 42.

[0132] Three rod-shaped protrusions 74b are integrally formed on each of the left and right sides of the inner surface of the helmet shell 36 in the temple region. The fixed arms 54 of the interior structure assembly 40 can be detachably connected to these rod-shaped protrusions 74b. The rod-shaped protrusions 74b can be seen in the cross-sectional view of the helmet shell 36 in FIG. 24. The rod-shaped protrusions 74b are hollow members with a rectangular cross section. The base ends of the rod-shaped protrusions 74b are integrally formed on the inner surface of the helmet shell 36. The tip ends of the rod-shaped protrusions 74b protrude from the inner surface of the helmet shell 36 as free ends. The joints between the rod-shaped protrusions 74b and the inner surface of the helmet shell 36 and the transition portions to the helmet shell in the adjacent triangular regions are reinforced by ribs integrally formed between the rod-shaped protrusions 74b and the helmet shell 36. This allows the rod-shaped protrusions 74b to be firmly connected to the helmet shell 36. When a force is applied to the rod-shaped protrusion 74b from a direction laterally relative to the longitudinal direction of the rod-shaped protrusion 74b, attempting to bend the rod-shaped protrusion 74b, the rod-shaped protrusion 74b will attempt to deform the helmet shell 36 accordingly.

[0133] The helmet shell 36 has a recess 76 near the lower edge of the rear central portion in which the tensioning unit 48 of the neckband 46 is located so that the tensioning unit 48 can be accessed for manually fastening or unfastening the neckband 46 when the protective helmet 30 is fully assembled.

[0134] An attachment device 80 for the ear protection device 34 is provided inside the helmet shell 36. The attachment device 80 for the ear protection device 34 has two ear protection support portions 80a. The ear protection support portions 80a are pivot bearings that are either integrally formed on the inner surface of the helmet shell 36 or permanently joined to the inner surface of the helmet shell 36 as additional parts. A support bracket 37a that supports an earmuff member 35a is rotatably supported on the ear protection support portions 80a.

[0135] An attachment device 84 for the face protection device 32 is provided inside the helmet shell 36. The attachment device 84 for the face protection device 32 has two face protection device support portions 84a. Two fixed arms 132a of the visor 132 are rotatably attached to the face protection device support portions 84a. The face protection device support portions 84a are not formed integrally with the inner surface of the helmet shell 36, but are provided on a connector 136a. The connector 136a is coupled (snap-engaged) to the rod-shaped protrusion 74b. The free end of the fixed arm 54 is coupled to the rod-shaped protrusion 74b. In the attached state, the face protection device support portion 84a is disposed in the space formed by the lower edge of the helmet shell 36 extending downward, as described above.

[0136] The interior structure assembly 40 is the portion of the protective helmet 30 that comes into contact with the head of the user 26, and includes a support cage 42, a headband 44, and a neckband 46. The neckband 46 is equipped with a tension unit 48. The interior structure assembly 40 is fixed to the helmet shell 36 by a fixing arm 54. This allows the protective helmet 30 to be worn on the head of the user 26.

[0137] The support cage 42 is formed from a hard, elastic, and flexible material, preferably a plastic material such as polyamide. The support cage 42 has three fixing arms 54 formed in the left and right temple regions and the occipital region, extending diagonally downward or rearward. These three fixing arms 54 fix the interior structure assembly 40 to the helmet shell 36 at three points. This configuration forms a space 60 between the helmet shell 36 and the interior structure assembly 40 that can accommodate the earmuffs 35a, helmet light 10, and other helmet accessories, as well as the attachments 80 for the face protection device 32 and the attachments 84 for the ear protection device 34. In this embodiment, the support cage 42 is formed as a single-piece plastic molding. The support cage 42 is formed by a pair of spaced apart, band-like first support strips and a pair of spaced apart, band-like second support strips that cross each other at a central portion and merge the ends of each support strip into a single, annular support strip at four connection points. A cross-shaped cushioning material may be placed on the support strips to increase wearing comfort.

[0138] The fixing arm 54 extends from the support cage 42 at the connection point. The headband 44 is integrally formed with the support cage 42. Although not shown in detail, the neckband 46 has a front end that is detachably coupled to the rear free end of the headband 44, for example, by snap engagement. As shown in FIGS. 23A and 24, the neckband 46 has two free ends that can be fastened by a tensioning unit 48. The neckband 46 can be made of the same material as the support cage 42. The neckband 46 is coupled to the support cage 42 in such a way that the height between its free end and the headband 44 and its rear free end can be adjusted. For this purpose, the support cage 42 has two downwardly extending connecting arms, to which the neckband 46 can be coupled at a selected height. The neckband 46 has three holes arranged vertically, into which elastic bolts 49 protruding from each connecting arm can be engaged.

[0139] In the above example, the fixing arms 54 are fixed to the helmet shell 36 in different ways, but this is not essential. The fixing arms 54 may all be fixed to the helmet shell 36 in the same way. For this purpose, only the different fixing methods will be standardized.

[0140] To secure the interior structural assembly 40 to the helmet shell 36 at three points, first, the fixing arms 54 extending rearward and downward are inserted into slots formed in the helmet shell until the projections on the fixing arms 54 engage with the outer surface of the helmet shell. Next, the interior structural assembly 40 is brought closer to the inner surface of the helmet shell 36, and the rod-shaped protrusions 74b of the helmet shell are inserted into the through-holes of the fixing arms 54 extending laterally. This ensures that the rod-shaped protrusions 74b are securely engaged with the through-holes of the fixing arms 54. Then, when the fixing arms 54 are brought adjacent to the inner surface of the helmet shell between the helmet shell 36 and the rod-shaped protrusions 74b, the connectors 136a are inserted into the hollow portions of the rod-shaped protrusions 74b, thereby securing the fixing arms 54 in place. In this way, the interior structural assembly 40 and the helmet shell 36 are firmly secured to each other at three points. After the protective helmet 30 is placed on the user's head and secured to the user's head by the tension unit 48, the protective helmet 30 can be firmly secured to the user's head by tying a chin strap (not shown) of the protective helmet 30 under the user's chin, if necessary. The through-hole of the fixing arm 54 engages with the rod-shaped protrusion 74b over at least the same length as the inside of the through-hole. When a force is applied to the fixing arm 54 due to a load acting on the protective helmet 30 from above, the force is applied to the fixing arm 54 from the helmet shell 36 fixed to the free end of the fixing arm 54. This force acting on the fixing arm 54 generates moments at each of the three points (the fixing points of the fixing arm 54 to the helmet shell 36) that tend to deform the helmet shell 36 inward to its lower edge. In this way, a portion of the force acting on the helmet shell 36 is converted into deformation energy, thereby reducing the effect of the force acting on the wearer of the protective helmet 30. The transfer of moments from the fixing arms 54 to the helmet shell 36 can be further improved by stiffening ribs integrally formed with the fixing arms 54 .

[0141] The ear protector 34 includes two earmuff members 35a. Each earmuff member 35a is pivotally supported by a fork-shaped support bracket 37a. An ear protector support portion 80a of the ear protector 34 is fixed to the inner surface of the helmet shell 36. In FIG. 24, the ear protector support portion 80a is shown together with the support cage 42, but the ear protector support portion 80a is fixed to the inner surface of the helmet shell 36, not the support cage 42. FIG. 24 is merely intended to show where in space the ear protector support portion 80b is positioned relative to the support cage 42 of the interior structure assembly 40. A support bracket 37a, which supports the earmuff member 35a, is pivotally supported by the ear protector support portion 80a. The ear protector support portion 80a and the support bracket 37a are positioned and configured so that the support bracket 37a can pivot between two positions in the space 60. The two positions are a use position where the ear covering members 35a cover the user's ears, and a standby position where the ear covering members 35a are housed in the space 60 inside the helmet shell 36.

[0142] Each support bracket 37a is spring-biased and configured to be bendable in a region between its two ends extending into the space 60. When the ear covering members 35a are rotated away from the user's ears, each support bracket 37a assumes a non-bent position. When the ear covering members 35a are rotated toward the user's ears, each support bracket 37a assumes a bent position. When the protective helmet 30 is not worn on the user's head, the two ear covering members 35a are positioned substantially more inward than the positions of the user's ears that the ear covering members 35a would be adjacent to. In other words, the distance between the two ear covering members is substantially shorter than the distance between the user's ears. As a result, when the protective helmet 30 is worn on the user's head, the ear covering members 35a, 35b are maintained pressed against the user's ears by the pre-loaded springs. A pre-stressed spring 92a is used to bend each support bracket 37a between the two positions. Each support bracket 37a can be manually displaced between a bent position (adjacent position) and an unbent position (separated position). In each of these positions, the spring 92 generates an end position lock. When the protective helmet 30 is worn, the ear covering members 35a remain elastically pressed against the user's ears, as described above, and the end position lock of the support bracket 37a does not occur.

[0143] Additionally, each ear protection support portion 80a and each support bracket 37a is configured so that the support bracket 37a can be rotated only between the use position and the standby position, thereby allowing the ear covering member 35a to be accommodated in the space behind the user's ear without hitting the user's ear or the lower edge of the helmet shell 36.

[0144] The face protection device 32 will now be described in more detail. Figure 24 is an exploded, partially cutaway view of the protective helmet 30, showing the face protection device 32 along with other helmet accessories.

[0145] The face protection device 32 includes a visor 132. The visor 132 has two fixed arms 132a and two connectors 136a. A face protection device support portion 84a serving as an attachment 84 of the face protection device 32 is integrally formed with the connector 136a. The face protection device support portion 84a of the connector 136a can be attached to the temple area of ​​the inner surface of the helmet shell 36 by inserting and engaging the connector 136a with the hollow portion of the rod-shaped protrusion 74b provided in the temple area of ​​the inner surface of the helmet shell 36. The connector 136a and the face protection device support portion 84a are shown in FIG. 24. Only one of the two fixed arms 132a (and attachments 84) of the visor 132 is shown in FIG. 24. Each face protection device support portion 84a has three elastic and flexible cams 85a protruding in the axial direction. These cams 85a press against annular bearing bushings attached to the fixed arms 132a, thereby enabling the fixed arms 132a to be detachably and rotatably fixed to the face protection support portion 84a. The face protection support portion 84a and the fixed arms 132a are constructed and arranged so that each fixed arm 132a can be rotated within the space 60 between a use position (FIG. 20) in which the visor 132 is closed to protect the face and a standby position (FIGS. 21 and 22) in which the visor 132 is open and closely adjacent to the outer surface of the helmet shell 36. The mounting fixture 84 of each fixed arm 132a of the face protection device 32 has a self-locking holder. For this purpose, each connector 136a has a spring-loaded bolt that holds the annular bearing bushing 134a attached to the fixed arm 132a in a resiliently biased state in the use position or the standby position.

[0146] The visor 132, together with each fixing arm 132a, forms a fork-shaped member (FIG. 24), which closely fits against the outer surface of the helmet shell 36 when the visor is open. When the visor 132 is closed, the upper edge of the visor 132 is adjacent to the front edge of the helmet shell 36, and the side edges of the visor 132 are adjacent to the outer surface of the helmet shell. Therefore, when the protective helmet 30 is used, for example, for forestry work, there is no risk of tree branches getting caught on the fixing arms 132a of the visor 132 or the visor 132, endangering the user 26 of the protective helmet 30, whether the visor 132 is closed or open.

[0147] The tensioning unit 48 will be briefly described below. The tensioning unit 48, like the ear protection 34 and the helmet light 10, is a helmet accessory. Since the tensioning unit 48, together with the ear protection 34, is always positioned within the contours of the helmet shell 36, there are no protruding portions in the area of ​​the tensioning unit 48 that could potentially catch on obstacles. Both ends of the neckband 46 are detachably connected to the neck area by the tensioning unit 48. The tensioning unit 48 has holders 168 into which both ends of the neckband 46 are inserted. The holders 168 have rectangular engaging protrusions that can engage with rectangular openings in the neckband 46. This allows the length of the neckband 46 to be roughly adjusted according to the size of the user's head. This adjustment is appropriately performed so that the protective helmet 30 can be easily donned when the tensioning unit 48 is not being operated. After the protective helmet 30 is donned, tension is applied to the neckband 46 using the tensioning unit 48, as described below. The tensioning unit 48 is operated by a latch flap 174. By manipulating the latch flap 174, the support shell 172 with the cushioning member 180 can be moved closer to or further away from the back of the user's 26's head.

[0148] The helmet light 10 fixed to the front region of the helmet shell 36 can also be seen from the underside of the helmet shell 36. The battery holder 214, which is arranged on the outside of the rear region of the helmet shell 36, is also visible, and only the upper fixing hook 218a and the lower fixing hook 222a of the fixing elements of the battery holder 214 are visible. Also, the connection cable 24 extending from the helmet light 10 to the battery pack 100 arranged in the battery holder 214 is not visible from the underside of the helmet shell. For simplicity's sake, the connection cable 24 does not extend along the lower edge of the helmet inside the lower edge of the helmet shell, but crosses the space present below the lower edge of the helmet shell, passes through the helmet shell 36, and is connected directly to the battery pack 100 through an opening in the helmet shell 36. This is because the connection cable 24 extending close to the lower end of the helmet shell 36 could easily come into contact with objects outside the helmet shell 36 and be unintentionally pulled out from its designated position on the battery pack 100. To avoid this, it is advantageous for the connection cable 24 to have an appropriate length. Alternatively, the helmet shell 36 may be provided with a special recess / opening through which the connecting cable 24 passes to connect the helmet light 10 to the battery pack 100 in the battery holder 214 .

[0149] 25A-25I illustrate a graphical user interface for operating the helmet light. The graphical user interface may be displayed, for example, on a separate display that may be wirelessly or wired connectable to the helmet light 10. Various representations of the graphical user interface may be in English and black and white, for example, although it should be understood that various colors and / or languages ​​may be used.

[0150] The display that displays the graphical user interface may be part of a smartphone, for example. The smartphone may be connected to the helmet light via a cable. For this purpose, for example, the plug connector 3000 or the connecting plug connector 3002 provided on the helmet light 10 may be used. The smartphone connected to the helmet light 10 via a cable may also be used as a power source for operating the helmet light 10. Specifically, the smartphone may be used as a supplement to the battery pack 100 or as a replacement for the battery pack 100. The smartphone may also be used as a power bank for charging the battery pack 100. The smartphone may also be connected to the helmet light 10 wirelessly. In this case, the helmet light 10 must be equipped with a short-range communication interface, such as a Bluetooth (registered trademark) interface.

[0151] Various functions of the helmet light 10 can be controlled via a smartphone, particularly via a graphical user interface displayed on the smartphone screen. Furthermore, as shown in FIG. 25A , the graphical user interface can display status information for the helmet light 10. For example, the graphical user interface can display the temperature of the helmet light 10, particularly the temperature of the controller board 18, or a temperature detected by a temperature sensor located on the controller board 18. Naturally, the temperature of the controller board 18 or another location on the helmet light 10 can also be detected by a temperature sensor located on the helmet light 10 or another location on the helmet light 10. In this regard, an automatic temperature-controlled shutdown or power reduction can be performed to prevent damage to the helmet light 10. Furthermore, the temperature of the battery pack 100 can also be detected and displayed. Similarly, the voltage provided by the battery pack 100, the current strength provided by the battery pack 100, and the possible charging current can also be detected and displayed by corresponding sensor elements. The charging status of one or more battery packs 100 electrically connected to the helmet light 10 can also be displayed. The status information may also include information about the currently active, adjustable brightness of the helmet light's 10 available elements and other connected elements. For example, in FIG. 25A, the walking, helicopter, and battery lights are displayed at 100%, which corresponds to the maximum light output of each lighting element or lighting mode. Meanwhile, the face light is displayed as inactive, and the work light is displayed as partially active, i.e., at 80% of its maximum light output. Each status information may be displayed alphabetically or numerically, using various color scales or intensities, or as a bar graph. For example, to improve visibility, the various status information for the helmet light 10 may be displayed alternately, reducing the amount of information displayed on a single screen and instead displaying each status information larger.

[0152] The helmet light 10 can be operated, for example, using a touch-sensitive display, and additional information and functions can be activated or called up by touching one of the various elements depicted in the drawings. Figures 25B and 25C show some basic information about the helmet light 10 displayed by an app that can be installed on a smartphone. This app can be used to connect the smartphone to the helmet light 10 via a wireless connection, in particular via Bluetooth®. For this purpose, the helmet light 10 is first activated via the switch 120. This activation puts the helmet light 10 into at least a standby mode, which allows a connection to be established with the smartphone.

[0153] FIG. 25C shows the initial screen of the user interface when the app has not yet connected to the smartphone, and FIG. 25B shows the same initial screen when the app has successfully connected to the smartphone.

[0154] In the upper region of this initial screen, the connection status with the helmet light 10 is indicated by hatching, indicating that a connection has been established, and also by the text "Connecting." The hatching shown in FIG. 25B can represent an eye-catching color design in the marked area of ​​the initial screen. Once the connection is established, the user interface display changes accordingly. Furthermore, in the lower region of the initial screen shown in FIG. 25B, the camera module of the helmet light 10, designated "PRO-TOSCAM," is displayed in an on state and can be controlled via a corresponding switch. The display is again indicated by hatching, which again can represent a color coating or color change, and may additionally or instead be displayed in text. For example, the color of the various switches can be changed from red, corresponding to an inactive state, to green, corresponding to an active state. The color change can also distinguish between the connected and disconnected states of the smartphone and the helmet light 10. The lower regions of the initial screens shown in FIGS. 25B and 25C further illustrate that the full range of lighting modes provided by the helmet light 10 can be made visible to the user using one or more demo functions. These various demo functions can explain various basic functions of the helmet light 10 to the user at an early stage, and can be useful in the usage stage when the user has gained sufficient experience in operating the helmet light 10 to confirm the functionality of the lighting modes provided by the helmet light 10. Similarly, as shown in Figures 25D to 25I, various display screens of the graphical user interface displayed by the app visually and / or in text indicate various operating states of the helmet light 10.

[0155] In particular, the cone-shaped illumination areas shown in Figures 25D, 25F, and 25H, which are indicated by hatching for easy user recognition, visualize the various illumination modes of the helmet light 10. Thus, Figure 25D shows two cone-shaped illumination areas: the lower illumination area corresponds to a walking light, and the upper illumination area corresponds to a work light. In Figure 25F, the upper illumination area corresponds to a face light on the user's head, and the lower illumination area corresponds to a walking light. Figure 25H shows the illumination area of ​​a helicopter light. In each illumination mode, various light intensities ranging from 0% to 100% can be selected individually or in any combination. Furthermore, a temporary function called "turbo operation" can be provided, which temporarily increases the light output of the LED element 1610 of the helmet light 10 outside of its normal operating specifications. This function can be selected, for example, by pressing and holding the "turbo" switch shown in Figures 25E and 25G. Furthermore, a temperature display for the helmet light 10 can be displayed. It is also possible to set a maximum permissible temperature for the helmet light 10, for example via an assigned operating element. If the temperature of the helmet light 10 exceeds the set maximum temperature, the output of the helmet light 10 is reduced. As shown in the lower region of FIG. 25D, the helmet light 10 can be switched between various light modes, such as flashing with varying pulse widths. Furthermore, the illumination intensity may be increased over time to avoid glare effects that may occur when the helmet light 10 is suddenly switched on. Similarly, it is also conceivable to turn off the helmet light 10 for an extended period of time if the battery pack 100 is expected to be depleted.

[0156] The features of the invention disclosed in the above description, in the drawings and in the claims may, either alone or in any combination, be essential to the implementation of the invention. [Explanation of symbols]

[0157] 10. Helmet Light 12 Cover 14 Lens unit 16 Career Elements 18 Controller Board 20 cooling elements 21 Cooling rib 22 Cover Elements 23 Screw 24 Connection cable 25 recess 26 users 28 Connection Cable 30 Protective Helmet 32 Face protection 34 Ear protection 35 Ear covering member of ear protection equipment 36 Helmet shell 37a Support bracket 40 Interior structure assembly 42 Support cage 44 Headband 46 Neckband 48 Tension unit 49 volts 50 Ventilated Slide 52 Opening 53 Ventilation 54 Support arm 56 Front edge 58 Notch / Groove 62 Reinforcing rib 64 Branch-like extension 74 Rod-shaped protrusion 76 Recess 80 Ear protection fixing part 80a Ear protection support part 84 Face protection fixing part 84a Face protection support part 85a Cam 92a Spring 100 Battery Pack 102 Display / operation elements 110 Web 112 Front fixing hook 114 Front fixing hook 116 Rear fixing hook 118 Rear fixing hook 120 Switch 122 Fixed Elements 124 Glare Shield 130 Protective Goggles 132 Visor 132a Fixed arm 136 Plug 168 Holder 172 Support shell 174 Latch flap 180 Cushion member 190 Charging plug 192 connector plug 194 Battery body 196 Seal Lip 196a Color 198 Charging contacts 200 Communication contacts 202 Communication contacts 204 Magnet 206 Charging contacts 208 Seal Lip 208a Color 210 Lateral detent protrusion 212 Detent protrusion 214 Battery holder 216 Upper fixed arm 216b Upper fixed arm 218a Upper fixing hook 218b Upper fixing hook 220 frames 222 Lower fixing hook 222b Lower fixing hook 223 steps 224 tabs 1104a Magnet 1104b Magnet 1106a PCB 1106b PCB 1106c PCB 1106d PCB 1108a Electrical contacts 1108b Electrical contacts 1110a Casting material 1110b Casting material 1112a Electrical contact surface 1112b Electrical contact surface 1112c Electrical contact surface 1114a Recess 1114b Recess 1116a Convex part 1116b Convex part 1118 Battery Cell 1120 Foil Cover 1122 Cover 1124 End face 1400a Fresnel lens 1400b Fresnel lens 1400c Fresnel lens 1402 Directional Unit 1602 Notch 1604 hole 1608 Conductor Track 1610 LED element 1612 Mechanical Switch Elements 1614 Mechanical Switch Elements 1616 frames 1804 Bending section 1806 Hole 2000 temperature display element 2002 Battery charge level display element 2004 On / Off Switch 2006 LED backlight 2008 display area 3000 Plug Connector 3002 Connection plug connector 3002a connector 4000 Helicopter LED 4002 Helicopter LED 4002b Helicopter LED 4004 Edge

Claims

1. A battery holder (214) fixed to a protective helmet (30), comprising: a frame (220) having an upper end and a lower end; a plurality of fixing hooks formed on the frame (220); The plurality of fixing hooks are configured to fix the battery holder (214) to the outer periphery of the helmet shell (36) of the protective helmet (30), and The plurality of fixing hooks abut from the outer periphery of the helmet shell (36) to the inner periphery of the helmet shell (36).

2. 2. The battery holder (214) of claim 1, The plurality of fixed hooks include upper fixed hooks (218a, 218b) and lower fixed hooks (222a, 222b), The battery holder (214) has the unlocking sides of the upper fixing hooks (218a, 218b) facing the unlocking sides of the corresponding lower fixing hooks (222a, 222b).

3. 3. The battery holder (214) of claim 2, The battery holder (214) is configured such that the unlocking sides of the upper fixing hooks (218a, 218b) are larger than the unlocking sides of the lower fixing hooks.

4. 4. The battery holder (214) of claim 3, Each of the upper fixing hooks (218a, 218b) has a step (223) provided on the opposite side of the unlocking side.

5. A battery holder (214) according to any one of claims 2 to 4, Each of the upper fixing hooks (218a, 218b) is formed on an upper fixing arm (216a, 216b) of the frame (220), a battery holder (214).

6. A battery holder (214) according to any one of claims 2 to 5, Each of the lower fixed hooks (222a, 222b) is formed directly on the frame (220), a battery holder (214).

7. A battery holder (214) according to any one of claims 1 to 6, The frame (220) has a generally cylindrical shape, A battery holder (214) in which some of the plurality of fixing hooks are disposed at the upper and lower ends of the frame (220).

8. A battery holder (214) according to any one of claims 1 to 7, The frame (220) has a tapered structure narrowing toward the lower end and has a tab (224) at the lower end; The battery holder (214) is configured so that the lower end of the tab (224) faces the lower end of the frame (220) and is configured to be elastically deformable outward from the frame (220).

9. A helmet light (10) comprising a battery holder (214) according to any one of claims 1 to 8.

10. A protective helmet (30) comprising a helmet light (10) according to claim 9.

Images