MOBILE ELECTRONICS DEVICE

Description

[0001] The present invention relates to a mobile electronic device for attachment to a human body part and to an electronic set comprising at least two such mobile electronic devices.

[0002] It is known to provide mobile electronic devices for attachment to the human body. Examples include smartwatches, fitness trackers, and similar devices. These are typically attached to the arm with flexible wristbands, allowing the user to use them on the go. These flexible wristbands can be manually placed around the respective body part and secured in this position with locking mechanisms. The disadvantage of these solutions is the relatively high effort required to fold over the flexible wristbands and secure them.

[0003] Also known are snap springs, which are used as passive wristbands. Such snap bands are long, spring-shaped bases that can be wrapped around a body part and snap into a secure position. The disadvantage of these solutions is the high residual stress in these snap springs, which makes combination with electronic components difficult and sometimes even impossible. This is particularly true because the preload of such snap springs makes it difficult to seal the electronic components against water and dust, as well as to protect them from mechanical stress. A further disadvantage of these known snap bands is their complex operation.

[0004] US2015 / 135410A1 discloses an example of a snap bracelet.

[0005] The object of the present invention is to at least partially remedy the disadvantages described above. In particular, the object of the present invention is to provide a quick and, in particular, one-handed attachment option for a mobile electronic device to a body part in a cost-effective and simple manner. Preferably, this simultaneously ensures a protected arrangement of the electronic components.

[0006] The above object is achieved by a mobile electronic device having the features of claim 1 and an electronic set having the features of claim 22. Further features and details of the invention emerge from the subclaims, the description, and the drawings. Features and details described in connection with the mobile electronic device according to the invention naturally also apply in connection with the electronic set according to the invention, and vice versa, so that with regard to the disclosure of the individual aspects of the invention, reference is always made to each other.

[0007] According to the invention, a mobile electronic device is provided for attachment to a human body part. The mobile electronic device comprises an electronics housing with electronic components arranged therein. A flexible attachment arm is arranged on each of two oppositely oriented wall sections of this electronics housing. These attachment arms extend away from the electronics housing and are flexibly deformable between a fastening position for attachment to the body part and a release position for releasing the body part. Furthermore, in the release position, the attachment arms are preloaded with a biasing force toward the fastening position.

[0008] A core concept of the invention is the provision of a mobile electronic device, such as smartwatches, fitness trackers, or the like. A key concept is, in particular, a mobile signaling or communication unit capable of emitting light signals from the body part, as will be explained later. Appropriate electronic components in the form of lamps, battery devices, or the like can be provided for this purpose.

[0009] The core concept of the invention, a lightweight and simple attachment to the user's body, is ensured by the provision of two separate fastening arms. However, unlike slack watch straps, these fastening arms are pre-tensioned. The pre-tension is present in the release position of the fastening arms and is directed toward the fastening position. This means that releasing this pre-tension force in the release position leads to a movement of the fastening arms into the fastening position guided by the pre-tension force. Similar to the snap springs explained in the introduction, an automatic movement from the release position to the fastening position, for example in a snapping manner, can occur.To apply and attach the device to a body part, the user can leave the fastening arms in the pre-tensioned release position and move them to a desired position on the user's body part. As soon as this position, in which the mobile electronic device is to be attached, is reached, the user triggers the pre-tensioning force of the release position, for example by applying appropriate pressure points to the fastening arms. This pre-tensioning force moves the two fastening arms from the release position into the fastening position, with a residual pre-tensioning force remaining in the fastening position. This residual pre-tensioning force can also be understood as the remaining fastening force and serves to create a frictional connection between the fastening arms in the fastening position and the body part.

[0010] As can be seen from the above explanation, one-handed attachment to the body part is now possible. The user grasps the electronics housing with one hand and guides the two attachment arms, for example, to two different sides of their upper arm. As soon as this position of the attachment arms has been reached, especially when the underside of the electronics housing touches the outside of the upper arm as a body part, the user presses on the pressure points of the two attachment arms, thereby triggering the pre-tensioning force secured in the release position. The pre-tensioning force triggered in this way moves the attachment arms, for example in a snapping movement, into a curved attachment position around the upper arm, thus securing the mobile electronics device in this attachment position.

[0011] In addition to the very simple one-handed operation when attaching to the body part, the device can also be removed from the body part using just one hand. Based on the explanation in the previous paragraph, the user can also grasp the attached mobile electronics device by the electronics housing and simply pull it out of the fastening position against the increasing pre-tensioning force by re-deforming the fastening arms. In particular, the fastening arms will move completely into the release position by applying counterpressure against the body part, so that the pre-tensioning force is secured again by the fastening arms locking into this release position. The pre-tensioned release position is thus automatically re-tensioned for a future fastening process after the mobile electronics device has been removed from the body part.

[0012] In addition to easier handling and, in particular, the one-handed operation options, the protection of the electronic components in a mobile electronic device is very easy to ensure. Due to the fact that a preload force and a fastening force act on the fastening arms, these forces must be supported on the electronics housing. This occurs at the oppositely aligned wall sections, in particular at the receiving sections explained later. A decisive advantage of an electronic device according to the invention is that the electronics housing itself, in particular the electronic components arranged therein, are not affected by the forces of the fastening arms. In particular, the electronic components are positioned in the electronics housing force-free or free from the preload force and / or the fastening force of the fastening arms.This is possible because the two mounting arms are separated from each other and, in particular, do not extend through the electronics housing.

[0013] From the above explanation, it is now clear that a functional separation is created between the force-based fastening functionality in the fastening arms and the force-free enclosure of the electronic components in the electronics housing. This allows for better and / or simpler protection of the electronic components and thus increases the longevity of the mobile electronics device. Furthermore, the desired seals against dust or water are significantly easier to provide, since the corresponding sealed areas of the electronics housing are not subject to the fastening forces and preload forces. In other words, easier operation of a mobile electronics device for the user can now be combined with increased longevity in terms of freedom from force on the electronic components and sealing against dust and water.This force-free design offers a cost-effective manufacturing option.

[0014] It should also be noted that the electronic components can, of course, take a wide variety of forms. Any number of sensors, such as gyroscopes, force sensors, light sensors, or similar, are conceivable. Communication devices, such as Bluetooth elements, Bluetooth Low Energy elements, UWB (Ultra Wide Band) elements, NFC elements, or mobile radio elements, can also be selected as electronic components. Vibration motors, acoustic actuators, the previously discussed LEDs or battery devices, as well as control modules for controlling the other electronic components, can also be arranged as electronic components in the electronics housing.

[0015] It can be advantageous if, in a mobile electronic device according to the invention, the two fastening arms in the release position have a preload deformation that maintains the preload force in the release position. This preload deformation serves, in particular, to secure or lock the fastening arms in the release position, so that, for example, by activating pressure points on the fastening arms, this preload deformation can be canceled in order to release the preload force for a movement of the fastening arm from the release position to the fastening position. Conversely, in the release position, the fastening arm will assume the preload deformation and thus secure the preload force.For example, the fastening arms can be designed as separate snap springs, which have an additional preload curve, particularly transverse to the fastening curve, as will be explained later. The type and design of the preload deformation can also shift the pressure points for releasing this preload deformation. Thus, the design of the fastening arms can predefine where the pressure points should be positioned for the fastening process.

[0016] It is advantageous if, in a mobile electronic device according to the preceding paragraph, the preload deformation has a preload curvature whose orientation differs from a fastening curvature in the fastening position. In particular, a receiving section of the electronics housing is provided which predetermines this preload curvature. A preload deformation in a preload curvature is a particularly simple embodiment of such a preload deformation. The corresponding radii of curvature and thus the underlying circles of curvature of the preload curvature and the fastening curvature are preferably aligned transversely, in particular perpendicular to one another. The use of a receiving section in the electronics housing for clamping the fastening arms can predetermine this preload curvature by means of a corresponding curved receiving surface.This allows this preload curvature to be supported force-free in the receiving section and to keep the rest of the electronics housing free of force, even under high preload forces. The stronger the preload curvature, the easier it is for the fastening arm to snap from the release position into the fastening position when the preload deformation is released. The pressure point for triggering the preload force also shifts toward the electronics housing, further enhancing one-handed operation. In particular, it then becomes possible to press both pressure points of the two fastening arms simultaneously with a pliers grip, resulting in an essentially simultaneous snapping of the two fastening arms into the fastening position.

[0017] It is furthermore advantageous if, in a mobile electronics device according to the invention, the electronics housing has a receiving section on each of the oppositely aligned wall sections, in which receiving section a counter-receiving section of the respective fastening arm is received. Such a receiving section can, as explained in the previous paragraph, have a curved receiving surface, in particular to specify the preload curvature. Of course, complementary, preferably likewise curved receiving surfaces are also conceivable on the top and bottom of this receiving section in order to enable flat clamping of the fastening arm on both sides. Fastening in the receiving section can be achieved by clamping, screwing, overmolding, snapping in or the like. Compared to the total length of the fastening arms, the clamping length in the receiving section is preferably relatively short.For example, the clamping length or receiving length of the fastening arms can be in the range of approximately 1% to approximately 5% of the total length of the fastening arms. Further advantages can be achieved if, in a mobile electronics device according to the invention, the two fastening arms are of the same length or essentially the same length. This leads to, in particular, an identical or essentially identical design of the two fastening arms being achieved. Firstly, such an identical design of the fastening arms has the advantage that the mobile electronics device can be attached to the user's body part in both possible orientations. Secondly, a design of the two fastening arms with the same parts is advantageous in that the complexity of the mobile electronics device is reduced by the number of identical components.In addition to easier and simpler assembly, this also reduces component costs. It should also be noted that the length of the fastening arms is preferably adapted to the diameter of the body part usually intended for fastening. If the body part is the user's upper arm, for example, a minimum and maximum body part circumference can be defined depending on the person. The fastening arms are then designed in such a way that, at the maximum circumference of the body part, they still ensure sufficient wrapping for a firm and secure attachment to the body part. For the minimum circumference of the body part, the fastening arms are advantageously short enough that any overlap of the fastening arms in the fastening position does not exceed one third of the total length of the respective fastening arm.

[0018] Furthermore, it can be advantageous if, in a mobile electronic device according to the invention, at least one of the two flexible fastening arms has a pressure point, wherein the action of a compressive force on this pressure point moves the fastening arm into a release position in which the preload force is released and the fastening arm is moved into the fastening position by the released preload force. The release position therefore represents a defined intermediate position between the release position and the fastening position. In other words, the release position and the boundary between two areas are the boundary between two areas which distinguish a movement in the other direction. If the fastening arm is in the area between the release position and the release position, the fastening arm is stable in the release position. This can be achieved, for example, by a restoring force acting in the direction of the release position.As soon as such a restoring force is overcome by applying the compressive force via at least one pressure point, the fastening arm moves towards the release position. When the release position is exceeded, the fastening arm assumes a shape which releases the pre-tensioning force. For example, in the release position, a pre-tensioning curvature is at least partially eliminated, so that from this release position onwards, without further force being applied via the pressure point, the fastening arm is automatically moved into the at least one fastening position. This movement ends as soon as resistance is encountered, for example from a surface of the body part to which the electronic device is to be attached. In other words, after the release position is exceeded, the fastening arm snaps into the fastening position or towards the fastening position.

[0019] It is also advantageous if, in a mobile electronics device according to the invention, both fastening arms have a pressure point, in particular at an identical or substantially identical position. The two pressure points are preferably distributed symmetrically with respect to the electronics housing on the two fastening arms. One advantage that can be achieved in this way is that the two fastening arms can be designed identically and, when mounted symmetrically, perform the fastening function on both sides. The complexity is reduced here by a reduced number of components, and in this way costs are minimized. It is also possible to operate the two pressure points one-handed with a human hand in the form of a clamp grip, thus carrying out the fastening process.In addition, the symmetry makes it possible to attach it to the body part in two different orientations, which further improves intuitive usability.

[0020] It is further advantageous if, in a mobile electronic device according to the invention, the at least one pressure point has a gripping distance from the electronics housing which is less than the gripping width of a human hand. The clamping grip of a human hand already described in the previous paragraph becomes even easier to use in this way. In particular, the entire electronic device can be held at the pressure points using such a clamping grip. Once it has been placed on or around the corresponding body part, the user can increase the pressure using the clamping grip until the applied pressure force exceeds a restoring force of the fastening arms. This initiates the movement into the release position, whereby the snapping movement of the fastening arms subsequently completes the fastening.This clearly demonstrates the ergonomic and, above all, one-handed usability, which, for example, allows the device to be applied one-handed to the user's opposite upper arm.

[0021] It is also advantageous if, in a mobile electronic device according to the invention, at least one pressure point is arranged centrally or substantially centrally between the edges of the mounting arm. Particularly in embodiments with a preload curve, the pressure point can be arranged in a lower area between the edges of the mounting arm. Thus, the upwardly curved edges provide anti-slip protection and simultaneously guide the user's fingers to the correct pressure point. This also further improves safety and ease of use.

[0022] It is also advantageous if, in a mobile electronic device according to the invention, the at least one pressure point has a pressure point surface whose surface normal is oriented perpendicular or substantially perpendicular to a main extension of the fastening arm in the preloaded position. The surface normal is a vertical straight line through the pressure point surface and can, in particular, also be referred to as the perpendicular bisector of the pressure point surface. In other words, in this embodiment, the pressure force is applied perpendicular or substantially perpendicular to the pressure point surface and thus also to the main extension of the fastening arms. This facilitates the precise application of force and reduces the risk of slipping from this position.

[0023] Furthermore, it is advantageous if, in a mobile electronics device according to the invention, at least one of the fastening arms has a counter-pressure point spaced from the pressure point, wherein the action of a counter-pressure force that is opposite to the pressure force moves the fastening arm from the release position into the release position and secures the preload force. The counter-pressure point is preferably further away from the electronics housing than the pressure point of the respective fastening arm. Counter-pressure points are also preferably arranged on both fastening arms, in particular symmetrically to the electronics housing. The counter-pressure points allow targeted guidance of the fastening arms into the release position and the securing of the preload force. In particular, the introduction of the counter-pressure force supports a deformation of the respective fastening arm to assume a preload deformation, for example in the form of a preload curvature.

[0024] It is also advantageous if, in a mobile electronics device according to the invention, at least one of the two fastening arms has a light guide, in particular in the form of a light guide layer, wherein at least one light source as an electronic component is arranged in the electronics housing in light-transmitting contact with the light guide. This provides an electronic component in the form of one or more light sources, which allows light communication to the outside. A significant advantage is that, in this embodiment, the light sources are integrated into the electronics housing as electronic components, and the fastening arms can thus be equipped free of the light sources and thus, in particular, also free of electronic components. In this way, the light sources, for example in the form of LEDs, can be mounted on a circuit board in the electronics housing in a force-free, dust-tight and watertight manner.By making surface contact with a coupling surface of the light guide, it is possible to introduce emitted light from the lamps into the light guide and guide it along its extension along the mounting arms. The coupling can take place at separate components, reflective surfaces of the mounting arm, or the coupling surfaces of the light guide itself, which will be explained later. This makes it possible to provide a signaling function with the electronic component entirely within the electronic component and a radiation and thus signaling surface that is integrated into the mounting arms. This combination is only so easily possible because the mounting arms are designed separately from the electronics housing in terms of their fastening and preload forces, so that mechanical stress on the electronic components in the form of the lamps can be essentially completely avoided.The design of the light guide in the form of a light guide layer is particularly advantageous because it can completely or essentially completely cover the surface of the fastening arm. This light guide layer can be attached to a base body of the respective fastening arm, or can be held in the desired position on the fastening arms by a combination with a protective layer (explained later). Of course, more than one light source, in particular a plurality of identical light sources in the form of LEDs, can be arranged within the electronics housing. The light guide itself has at least the same flexibility as that provided for the deformation between the release position and the fastening position of the fastening arms. Preferably, the light sources in this embodiment are all identical and can, in particular, provide several colors simultaneously.Color changing is also preferably possible with such LEDs. Mechanical attachment of the light guide to the base body is also conceivable via recesses or cutouts in the base body.

[0025] Further advantages can be achieved if, in a mobile electronic device, the optical fiber has output surfaces for outputting the guided light in an output direction away from the mounting arms. Such output surfaces can be, for example, slots or point-shaped depressions in the optical fiber, in particular the optical fiber layer. These are advantageously attached to the underside of the optical fiber, i.e. on the side of the optical fiber that contacts the top side of the mounting arms. The mounting arms are preferably formed from a solid base body, in particular from metal. The output surfaces can be simple depressions or slits in the optical fiber. Alternatively or in addition to the slits, printed dots or other surface shapes can also be conceivable as output surfaces on a side of the base body opposite the output direction.However, additional reflective surfaces or separating elements can also be formed within the light guide to create individual light guide channels. The output surfaces can form geometric shapes that, when irradiated with light rays from the illuminants, can be perceived as light elements or light shapes from outside the mobile electronic device. These output surface shapes are preferably also point-shaped and / or linear, as this is easier and more easily perceived by other people for a signaling function than a planar radiation of the light.

[0026] It can also be advantageous if, in a mobile electronic device according to the invention, the output surfaces increase in size with increasing distance from the at least one light source. Since a portion of the light quantity is always output and emitted at each output surface along the length of the fastening arm, the available light quantity decreases with increasing distance from the light sources. In order to advantageously provide an equalization of the luminous intensity or a deliberate distribution of different luminous intensities over the entire length of the light guide, a small output surface will output a small percentage of a large amount of light at the beginning, i.e. close to the light sources, while at a point further away from the light sources a larger output surface will output a larger percentage of the total amount of light, which at this point has already been reduced.For other luminous intensity distributions, correspondingly different area ratios must be used. Preferably, the increase in the output area is correlated with the decrease in the amount of light, so that a uniform light emission from the output areas is achieved.

[0027] It is also advantageous if, in a mobile electronic device according to the invention, the fastening arms have a base body surrounded by a protective layer. Such a protective layer can preferably completely surround the fastening arm and, in particular, also protrude into receiving sections of the electronics housing. This protrusion can be designed in the form of sealing lips in order to provide a design that is as dust- and watertight as possible. The protective layer is also adapted to the necessary flexibility for mobility with reversible deformation between the fastening position and the release position. For example, the protective layer can comprise a silicone material to provide this function.The protective layer can also be designed as a protective sock, in particular as a silicone sock, and in this way the base body can be inserted into the interior of such a protective sock. This insertion can be made easier if the silicone sock is held in an open position, for example by means of negative pressure. Complete overmolding for forming the protective layer for the base body is also conceivable. When selecting the material for the protective layer, the amount of emitted light can be increased by choosing advantageous refractive indices. A further improvement in the optical properties can be achieved by forming an air layer between the light guide and the protective layer. A light guide can be formed integrally with this protective layer or incorporated into it separately.Additionally or alternatively, color layers are also conceivable, which are either integrated into the protective layer or applied to a base body of the fastening arms. Such color layers, particularly film, powder, or lacquer layers, are capable of personalizing the mobile electronic device through appropriate color selection and / or improved reflective properties, particularly through passive reflective elements.

[0028] It is further advantageous if, in a mobile electronic device according to the invention, the fastening arms are designed to be free or essentially free of electronic components. This allows the fastening arms to concentrate entirely on the fastening function, allowing the necessary preload and fastening forces to be applied independently of the otherwise necessary protection of electronic components. The flexibility and movements of the fastening arms serve the fastening function without leading to wear on electronic components of the electronic function.

[0029] Further advantages can be achieved if, in a mobile electronics device according to the invention, housing light sources are arranged in the electronics housing for emitting light through housing windows. These are in particular separate from the already explained light sources for coupling light into the light guide of the fastening arms. The housing light sources are preferably also arranged on a circuit board. Housing windows can be made of the same material as the remaining housing sections of the electronics housing. However, they are preferably made transparent by an appropriate choice of material or by polishing the surface, so that the highest possible proportion of the light generated by the housing light sources also reaches the outside through these housing windows and can be perceived by people there.

[0030] Further advantages are achieved if, in a mobile electronic device according to the invention, the electronic components are arranged at least partially on a common printed circuit board, with fastening means, in particular, securing the printed circuit board to the electronics housing. A printed circuit board can be pre-produced and standardized, so that the final assembly of these electronic components arranged on the printed circuit board can take place very easily in the electronics housing. The use of fastening means allows the printed circuit board to be secured in the electronics housing, for example, using evenly distributed screws. In this way, it is also possible to attach the explained lighting devices in the form of LEDs, preferably without a gap, to the fastening arms and there to the light guide.Other electronic components, such as vibration motors, can also be precisely correlated with the electronics housing in this way, so that in the case of a vibration motor, its vibration can be transmitted to the underside of the electronics housing. Such a circuit board can be made of a wide variety of materials. For significantly better heat dissipation, especially when energy-intensive and heat-generating continuous operation is required, the circuit board can be made of aluminum.

[0031] It is further advantageous if, in a mobile electronics device according to the invention, fixing means are arranged on the housing for fixing the fastening arms to the electronics housing, which in particular have alignment domes for aligning the fastening arms to the electronics housing. Such fixing means can be used for reversible or irreversible fixing. Thus, clamping, snapping, or locking are generally conceivable, but the use of a screw connection for such fixing means is also conceivable within the meaning of the present invention. Preferably, an odd number of fixing means is provided for each fixing arm in order to ensure the most precise possible positioning and also the application of the preload force already explained.The alignment domes can, for example, protrude through corresponding receiving openings in the circuit board and / or the mounting arms to ensure the relative positioning of the individual components to one another during assembly.

[0032] It is further advantageous if, in a mobile electronic device according to the invention, the electronics housing has a curvature on its underside, for at least partially flat contact with the body part. This curvature of the underside is preferably adapted to and continues a fastening curvature in the fastening position. The curvature of the underside serves to form an average value for body parts with different body part diameters, so that at least partially flat contact is possible for as many different body parts as possible. In addition to increased comfort when wearing the attached mobile electronic device on the body part, flat contact also serves to improve transmission, for example when vibrations are to be generated by a vibration motor as an electronic component.

[0033] It can also be advantageous if, in a mobile electronics device according to the invention, the ends of the mounting arms spaced from the electronics housing have a rounded edge. In addition to improved handling, this reduces the risk of injury from the otherwise potentially sharp-edged design. Furthermore, a weight reduction of the mounting arms can be achieved while maintaining functionality.

[0034] The present invention also relates to an electronics set comprising at least two mobile electronic devices according to the invention. Thus, an electronics set according to the invention offers the same advantages as those explained in detail with reference to a mobile electronic device according to the invention. If the mobile electronic devices have a defined orientation for a fastening position on a left and a right body part of the user, the electronics set is preferably designed with one of these configuration variants each. It therefore offers a sales set for use on both sides of the body for corresponding body parts. To reduce the size of the electronics set in a packaging unit, the fastening arms are preferably arranged in the fastening position and intertwined with one another.Further advantages, features and details of the invention will become apparent from the following description, in which embodiments of the invention are described in detail with reference to the drawings.

[0035] They show schematically: Fig. 1 an embodiment of a mobile electronic device in release position, Fig. 2 the embodiment of the Figure 1 during the fastening process, Fig. 3 the embodiment of the Figures 1 and 2 in the fastening position, Fig. 4 a partial view of another embodiment of a mobile electronic device, Fig. 5 the embodiment of the Figure 4 in the fastening position, Fig. 6 a cross-sectional view of the embodiment of the Figure 4 , Fig. 7 a cross-sectional view of the embodiment of the Figure 5, Fig. 8 shows a further embodiment of a mobile electronic device according to the invention, Fig. 9 shows a partial cross-section through a further embodiment of a mobile electronic device according to the invention, Fig. 10 shows an embodiment of an electronic set according to the invention.

[0036] The Figures 1 to 3 show a particularly simple embodiment of a mobile electronic device 10 and the individual steps for attaching the same to a body part 200. In this example, the body part 200 can be an upper arm of a user.

[0037] To start the fastening process, the user is provided with a mobile electronic device 10 according to the Figure 1A plurality of electronic components 30 (not shown in detail here) are arranged in an electronics housing 20. Two wall sections 22 on the left and right sides of the electronics housing 20 each merge into a fastening arm 40, with the two fastening arms 40 extending downwards in a trapezoidal shape. The underside 21 of the electronics housing 20 serves to be applied to the body part 200, as shown in the Figure 2 shows.

[0038] In the Figure 1 It can also be seen that in the illustrated release position FP of the fastening arms 40, each of the two fastening arms 40 has a preload force VK inwards in the direction of the fastening position BP according to the Figure 3 By means of a pre-tension deformation VV, which will be explained later, this pre-tension force VK is secured in the release position FP, so that without action by the user this pre-tension force VK cannot be released.

[0039] If attachment to the body part 200 is now desired, the user grasps the mobile electronic device 10 of the Figure 1 for example, on the two wall sections 22 of the electronics housing 20 and guides the two fastening arms 40 left and right past the body part 200 into the position according to the Figure 2 . In particular, the underside 21 of the electronics housing 20 is placed on the upper side of the body part 200. As the two thick arrows in the Figure 2show, the user can now press pressure points here and thus actively move the two fastening arms 40 out of the release position FP. This outward movement leads to a preload deformation VV, as will be explained later, being cancelled, and the fastening arms 40 are transferred into the fastening position BP by the now released preload forces VK. In other words, the two fastening arms 40, driven by the released preload forces VK, now snap into the fastening position BP according to the Figure 3 This shows the fastening position BP, whereby the two now curved fastening arms 40 partially wrap around the body part 200 and in this way fasten and secure the electronics housing 20 in this fastening position BP to the body part 200.

[0040] Based on the Figures 4, 5, 6 and 7It is explained in more detail how the preload force VK can be secured. This refers in particular to an embodiment as described with reference to the Figures 1 to 3 has been explained. The Figure 4 shows the still extended configuration of the fastening arms 40 in the release position FP, in which the preload force VK is present in a secured manner. The securing is achieved by a preload deformation VV, as Figure 6 with a view from the left side of the Figure 4 This preload deformation VV has a preload curvature VKR, which prevents the fastening arm 40 from loosening from the release position FP, also shown here. This creates a preload force VK, but it is supported by the preload deformation VV and is therefore not released.

[0041] If the preload deformation VV is changed, for example by pressing in with a thumb or index finger, and in particular the preload curvature VKR is removed, this leads to the securing of the preload force VK no longer being ensured. Rather, this preload force VK is released and thus moves the fastening arm 40 into the fastening position BP according to the Figure 5 with a mounting curve BKR. The Figure 7 shows a cross section through the curved part of the fastening arm 40 of the Figure 5 along the longitudinal extension of this fastening arm 40. It is clearly visible here that in this curved section of the fastening arm 40, there is no longer any preload curvature VKR, so that the fastening position BP could be assumed accordingly. Depending on the design, a slight residual curvature is also possible here.

[0042] The Figure 8shows a view from below of another embodiment of a mobile electronic device 10. This is based on the design of the embodiment of the Figures 1 to 7 . In addition, however, the underside 21 of the electronics housing 20 is provided with a bottom curvature UKR, which is provided for the most flat application on the outside of the body part 200. In particular, it at least partially continues the fastening curvature BKR in order to also increase the comfort when worn on the body part 200. Two squares represent pressure sections located close to the wall sections 22, which can be grasped and pressed with a pincer grip using the user's thumb and index finger in order to achieve the pre-tension deformation, as it is with respect to the Figures 4 to 7 The presentation of the Figure 8 shows the fastening arms 40 in the release position FP.

[0043] Also good in Figure 8 It can be seen that the upper ends of the fastening arm 40 each have a counter-receiving section 44, which is inserted into a receiving section 24 of the electronics housing 20. This insertion takes place in a curved manner, so that the contact surfaces present there, in particular in a complementary manner, specify the preload deformation VV for the fastening arm 40. Likewise, the Figure 8 a variant can be taken in which a rounding is provided at the arm end 45 of the fastening arm 40 in order to reduce the risk of injury and to minimize the weight of the fastening arms 40.

[0044] The Figure 9shows a cross-sectional view of a possible interior of a mobile electronic device 10. Here, the mounting arm 40 is surrounded, among other things, by a protective layer 48, which is provided as a sock-like silicone protector. This protective layer 48 extends into a receiving section 44 of the electronics housing 20 and serves there as a dust- and watertight seal. Within the protective layer 48, next to a metallic base body 46, a light guide 42 is arranged as a light guide layer 43. This light guide layer 43 is transparent and can absorb light from a light source 32.

[0045] The illuminant 32 is arranged on a circuit board 36 within the electronics housing 20. This circuit board 36 is attached to the electronics housing 20 by means of fastening means 28, in this case a screw connection. This screw connection serves, in particular, to ensure gap-free contact with the light guide 42, so that light rays LS from the illuminant 32 can be coupled into the light guide 42. This occurs in the region of the counter-receiving section 44, which, with the aid of fixing means 50, allows the fastening arm 40 to be fixed in this position.

[0046] For the coupling out of light beams LS, slots on the underside, shown here in cross-section, are provided as coupling surfaces 41 in the light guide 42. The coupling direction AR is aligned essentially perpendicular to the base body 46, so that the light beams LS are coupled out in the same direction and are perceptible from the outside.

[0047] In addition, the Figure 9 Another variant is shown in which a housing light source 34 is arranged on the circuit board 36. This can also be LEDs that emit a light beam LS, which is visible from the outside through a housing window 26. In this way, supplementary or alternatively additional light functions can be created as a signaling function. Figure 10 shows an electronic set 100, which has two mobile electronic devices 10. These can in particular be electronic devices 10 according to the Figures 1 to 3If a distinction is made between the left and right sides of a user, this electronics set 100 consists of a left and a right embodiment of the mobile electronics device 10. This illustration also clearly shows that both fastening arms 40 of both electronics devices 10 are in the fastening position BP and wrap around each other, thus reducing the space required for a packaging unit for this electronics set.

[0048] The above explanation of the embodiments describes the present invention exclusively by way of examples. Of course, individual features of the embodiments can be freely combined with one another, provided they are technically feasible, without departing from the scope of the present invention, which is defined exclusively by the claims. List of reference symbols

[0049] 10Mobile electronic device 20Electronic housing 22Wall section 21Bottom 24Receiving section 26Housing window 28Fastening means 30Electronic component 32Illuminant 34Housing light source 36Printed circuit board 40Fastening arm 41Output coupling surface 42Light guide 43Light guide layer 44Counter-receiving section 45Arm end 46Base body 48Protective layer 50Fixing means 100Electronic set 200Body part BPFastening position BKRFastening curvature FPRelease position VKPreload force VVPreload deformation VKRPreload curvature UKRUnderside curvature AROutcoupling direction LSLight beam

Claims

1. Mobile electronic device (10) for attachment to a human body part (200), comprising an electronic housing (20) with electronic components (30) arranged therein, wherein a flexible fastening arm (40) is arranged on the electronic housing (20) on each of two oppositely oriented wall sections (22), which extend away from the electronic housing (20) and are flexibly deformable between a fastening position (BP) fastening to the body part (200) and a release position (FP) releasing the body part (200), characterised in that the fastening arms (40) are prestressed in the release position (FP) in the direction of the fastening position (BP) with a prestressing force (VK).

2. Mobile electronic device (10) according to claim 1, characterised in that the two fastening arms (40) have a prestressing deformation (VV) in the release position (FP), which holds the prestressing force (VK) in the release position (FP).

3. Mobile electronic device (10) according to claim 2, characterised in that the prestressing deformation (VV) has a prestressing curvature (VKR), the orientation of which differs from a fastening curvature (BKR) in the fastening position (BP), wherein in particular a receiving section (24) of the electronic housing (20) predetermines this prestressing curvature (VKR).

4. Mobile electronic device (10) according to one of the preceding claims, characterised in that the electronic housing (20) has a receiving section (24) on each of the oppositely aligned wall sections (22), in which a counter-receiving section (44) of the respective fastening arm (40) is received, and / or the two fastening arms (40) are of the same length or substantially the same length.

5. Mobile electronic device (10) according to one of the preceding claims, characterised in that at least one of the two flexible fastening arms (40) has a pressure point, wherein the action of a pressure force on this pressure point moves the fastening arm (40) into a release position in which the prestressing force (VK) is released and the fastening arm (40) is moved into the fastening position (BP) by the released prestressing force (VK).

6. Mobile electronic device (10) according to claim 5, characterised in that both fastening arms (40) have a pressure point, in particular at an identical or substantially identical position.

7. Mobile electronic device (10) according to one of claims 5 or 6, characterised in that the at least one pressure point has a gripping distance from the electronic housing (20) which is less than a gripping width of a human hand.

8. Mobile electronic device (10) according to any one of claims 5 to 7, characterised in that the at least one pressure point is arranged centrally or substantially centrally between edges of the fastening arm (40).

9. Mobile electronic device (10) according to one of claims 5 to 8, characterised in that the at least one pressure point has a pressure point surface, the surface normal of which is aligned perpendicularly or substantially perpendicularly to a main extension of the fastening arm (40) in the release position (FP).

10. Mobile electronic device (10) according to one of claims 5 to 9, characterised in that at least one of the fastening arms (40) has a counter-pressure point at a distance from the pressure point, wherein an action of a counter-pressure force, which is directed in the opposite direction to the pressure force, moves the fastening arm (40) from the release position into the release position (FP) and secures the prestressing force (VK).

11. Mobile electronic device (10) according to one of the preceding claims, characterised in that at least one of the two fastening arms (40) has a light guide (42), in particular in the form of a light guide layer (43), wherein at least one illuminant (32) is arranged in the electronic housing (20) as an electronic component (30) in light-transmitting contact with the light guide (42), wherein the light guide (42) preferably has decoupling surfaces (41) for decoupling the guided light in a decoupling direction (AR) away from the fastening arms (40), wherein furthermore the decoupling surfaces (41) preferably change, in particular increase, with increasing distance from the at least one illuminant (32).

12. Mobile electronic device (10) according to one of the preceding claims, characterised in that the fastening arms (40) have a base body (46) which is surrounded by a protective layer (48), and / or the fastening arms (40) are formed free or substantially free of electronic components (30), and / or the arm ends (45) of the fastening arms (40) spaced from the electronic housing (20) have a rounded edge.

13. Mobile electronic device (10) according to one of the preceding claims, characterised in that housing light sources (34) are arranged in the electronic housing (20) for emitting light through housing windows (26), and / or the electronic housing (20) has an underside curvature (UKR) on its underside (21) for at least partial flat contact with the body part (200), and / or fixing means (50) are arranged on the electronic housing (20) for fixing the fastening arms (40) to the electronic housing (20), which in particular have alignment domes for aligning the fastening arms (40) with the electronic housing (20).

14. Mobile electronic device (10) according to one of the preceding claims, characterised in that the electronic components (30) are arranged at least partially on a common printed circuit board (36), wherein in particular fastening means (28) fasten the printed circuit board (36) within the electronic housing (20) to the latter.

15. An electronic set (100) comprising at least two mobile electronic devices (10) having the features of any one of claims 1 to 14.