EP3970545A1 - Device, in particular a visor mechanism, for displacing a visor on a helmet and head protection system - Google Patents

Abstract

A device (4), in particular a visor mechanism, for moving a visor (3) on a helmet (2) comprises a helmet connection means (8) for connecting the device (4) to the helmet (2), a visor connection means (9) for connection of the device (4) with the visor (3), a guide means (10) for the guided displacement of the visor attachment means (9) relative to the helmet attachment means (8) between a closed position, in which the visor (3) is closed, an open position, in which the visor (3) is open, and a transfer position, between the closed position and the open position, and at least one biasing means (11) for biasing the visor connection means (9) arranged in the transfer position in the direction of the closed position and in the direction of the open position.

Description

The invention relates to a device, in particular a visor mechanism, for moving a visor on a helmet. Furthermore, the invention relates to a head protection system with such a device.

From the EP 3 366 153 A1 and the CA 2 767 266C head protection systems with a helmet, a visor and a device for displacing the visor on the helmet are known. The visor of these head protection systems can be shifted manually between a closed position and an open position. The disadvantage is that shifting the visor between the closed position and the open position requires practice, since the movement of the visor specified by the device relative to the helmet cannot be seen by the user and both sides of the visor must also be shifted synchronously relative to the helmet .

It is therefore an object of the invention to improve a device, in particular a visor mechanism, for shifting a visor on a helmet, in particular to improve the operability and thereby increase the reliability of the protective function of the head protection system.

This object is achieved by a device having the features of claim 1. It was recognized that a device for shifting a visor on a helmet can have a guide means for guided shifting of a visor connection means relative to a helmet connection means between a closed position, via a transfer position into an open position, with at least one pretensioning means the visor connection means arranged in the transfer position both in direction of Closing position as well as in the direction of the open position biases. As a result, the visor connection means can be shifted between the closed position and the open position, in particular beyond the transfer position, in a particularly reliable and comfortable manner. The pretensioning force acting on the visor connection means and the visor, preferably in every position of the movement pattern, provides the user with feedback on the movement pattern specified by the guide means. In addition, the at least one pretensioning means secures the visor connection means in the closed position and/or in the open position. Furthermore, the user is supported when moving the visor connection means from the transfer position to the closed position and/or open position. In this way, a force-free dead center can be avoided, in which the visor could inadvertently be arranged, but in which it is neither fixed nor adequately protects and/or releases the user's face. Due to the fact that the displacement movement of the visor connection means is predetermined relative to the helmet connection means and is pretensioned at every point of the displacement course in the direction of an end position, the visor connection means can be displaced particularly reliably, comfortably and safely.

The pretensioning of the visor connection means arranged in the transfer position in the direction of the closed position and in the direction of the open position is understood to mean that the at least one pretensioning means in the transfer position exerts a force on the visor connection means in the direction of the movement from the transfer position to the closed position or is oriented in the open position. In other words, the visor connection means is pretensioned relative to the helmet connection means in the two directions of displacement, which lead out of the transfer position.

The driving forces and/or driving moments brought about by the at least one pretensioning means in the transfer position between the visor attachment means and the helmet attachment means are preferably not collinear and/or not parallel. The force vector and/or moment vector resulting in the transfer position between the visor connection means and the helmet connection means is preferably not equal to zero in the direction of the closed position and in the direction of the open position.

According to one aspect of the invention, the visor connection means can be displaceable between the closed position and the transfer position along a first path of movement and/or be displaceable between the transfer position and the open position along a second path of movement. The guiding means can be designed in such a way that it limits the displaceability of the visor connection means relative to the helmet connection means to the first and/or the second movement path. The guide means is preferably designed in such a way that a displacement of the visor connection means relative to the helmet connection means along the first and along the second movement path is only possible in the transfer position. The respective movement path can determine a linear, in particular a rectilinear, displacement and/or a rotary displacement, in particular restricting the displaceability of the visor connection means relative to the helmet connection means to exclusively such degrees of freedom of movement. The first path of movement and the second path of movement preferably form the course of movement of the visor connection means between the closed position and the open position. The first movement path and the second movement path can adjoin one another in the transfer position.

The course of movement, in particular the first movement path and the second movement path, is preferably not continuously differentiable in the transfer position. There is preferably a kink between the first movement path and the second movement path. A smallest angle between the first movement path and the second movement path is preferably a maximum of 135°, in particular a maximum of 120°, in particular a maximum of 100°, in particular a maximum of 90°, in particular a maximum of 60°, and/or at least 30°, in particular at least 60°, in particular at least 90°, in particular at least 100°.

According to one aspect of the invention, the sighting mechanism, in particular the guide means and/or the pretensioning means, are designed in such a way that in the transfer position, a displacement movement of the sighting connection means in the direction of the closed position, in particular along the first movement path, can be blocked, while at the same time a displacement movement of the Visor connection means is released in the direction of the open position, in particular in the direction of the second path of movement. This preferably also applies in the opposite direction for a displacement movement of the visor connection means in the direction of the closed position, in particular in the direction of the first movement path, when blocking the second movement path. The shifting from the transfer position into the closed position and/or into the open position is preferably brought about, in particular completely, by the at least one prestressing means. This advantageously means that the user can shift the visor connection means along the respective movement path into the transfer position, in particular against a pretensioning force caused by the at least one pretensioning means, from which the visor connection means is automatically shifted into the new position by the pretensioning means.

Preferably, the shifting of the visor attachment means relative to the helmet attachment means along the second path of movement is released when the first path of movement is completely blocked and/or released along the first path of movement when the second path of movement is completely blocked, in particular such that the released movement between the transfer position and the closed position and/or the open position can be completely executed. The shifting between the transfer position and the open position and/or the closed position is preferably effected entirely by the at least one prestressing means. The fact that the at least one pretensioning means is designed to pretension the visor connection means arranged in the transfer position in the direction of the closed position and in the direction of the open position means that no change in the force vector exerted on the visor connection means, in particular by the user, is required in the transfer position to move the visor connection means into the transfer position and from the transfer position into the closed position and/or open position, in particular opposite the transfer position.

According to one aspect of the invention, the visor mechanism, in particular the guide means and/or the at least one pretensioning means, can be designed in such a way that the visor connection means snaps from the transfer position into the open position and/or snaps from the transfer position into the closed position.

According to a further aspect of the invention, the guide means is designed in such a way that it has at least one end stop for limiting the displacement movement of the visor connection means relative to the helmet connection means along the first path of movement and/or along the second path of movement in the transfer position. The guide means preferably has at least one end stop for limiting the displacement movement of the visor connection means relative to the helmet connection means in the open position and/or in the closed position.

The visor connection means can be designed for permanent or reversibly detachable connection to the visor. The visor connection means can also be formed in one piece, in particular integrally with the visor.

The helmet connection means can be permanently or reversibly detachably connected to the helmet, in particular to a helmet shell of the helmet. In particular, be materially connected to the helmet.

The terms closed position, open position and transfer position relate equally to the arrangement of the device, the visor attachment means relative to the helmet attachment means and the visor relative to the helmet. The fact that the visor is closed in the closed position and open in the open position can be seen from the device connected to the helmet and visor, but possibly not from the device in an uninstalled state. The terms closed position and open position can alternatively be understood in connection with the device in the uninstalled state as a first position and a second position.

The device preferably has a cover which at least partially, in particular completely, covers the helmet connection means and/or the visor connection means and/or the guide means. The disgust is preferably, in particular reversibly detachable, attachable to the helmet connection means. Together with the helmet connection means, the cover can form a housing in which the visor connection means and/or the guide means and/or the at least one pretensioning means are accommodated at least partially, in particular completely. This advantageously ensures that components of the device that are movable relative to one another are covered, in particular protected against reaching into them and/or against soiling.

The device can have at least one, in particular at least two, in particular at least three, in particular at least four of the pretensioning means. The device preferably has a maximum of four, in particular a maximum of two, of the prestressing means. The at least one prestressing means can be designed as a tension spring and/or as a compression spring and/or as a torsion spring and/or as a bending spring and/or as a rubber-elastic body. The at least one prestressing means can have a metallic material, in particular spring steel and/or a plastic or a rubber-elastic material. The rubber-elastic material preferably has a modulus of elasticity in a range from 1 MPa to 200 MPa, in particular from 10 MPa to 100 MPa, and/or a Shore A hardness in a range from 10 to 100, in particular from 20 to 60. on. At least one biasing means is preferably located between the helmet attachment means and the visor attachment means. The at least one biasing means can exert a biasing force and/or a biasing moment on the visor connection means.

The guide means preferably has at least one end stop for limiting the displaceability of the visor connection means relative to the helmet connection means, in particular in the closed position and/or in the open position, on. The prestressing means can be designed to prestress the visor connection means in the open position and/or the closed position, in particular against the respective end stop. As a result, the visor connection means can be reliably fixed in the open position and/or the closed position.

The guiding means can have at least one guiding resistance which is arranged between the closed position and the open position and which requires a force to overcome. The guide resistance can be formed, for example, by an elastic element that acts between the visor attachment means and the helmet attachment means. The guide resistance preferably comprises at least one, in particular two, elastic or rigid elements, in particular latching lugs, which interact with an elastic or rigid counterpart, in particular a latching web. The elastic means can be arranged on the helmet attachment means and the counterpart can be arranged on the visor attachment means or vice versa. The guide resistance is particularly preferably arranged along the course of displacement of the visor connection means adjacent to the transfer position, in particular on the side of the closed position. This advantageously means that a specific position along the course of the displacement, in particular the transfer position, can be detected by the user. The shifting of the visor can thus take place particularly reliably and conveniently.

The guide means is preferably designed in such a way that the visor connection means is moved at least partially, in particular exclusively, linearly between the closed position and the transfer position. This linear movement is preferably oriented in such a way that the visor moves from the closed position into the transfer position along a viewing direction of the User is shifted forward, especially in front of the helmet. The guide means can be designed in such a way that the visor connection means is moved upwards, in particular linearly moved and/or pivoted, with regard to the viewing direction of the user when it is shifted from the transfer position into the open stall.

A device according to claim 2 can be produced particularly economically and is reliable in operation. A single prestressing means is understood to mean a prestressing means which has a single operating principle, i.e. is designed, for example, as a spiral spring or torsion spring or tension spring, and/or has a single functional section and/or is designed in one piece, in particular cohesively. Preferably, the single biasing means effects biasing of the visor connecting means located in the transfer position both in the direction of the closed position and in the direction of the open position. For this purpose, the prestressing means can be arranged, for example, eccentrically to an axis of rotation about which the visor connection means can be pivoted out of the transfer position. As a result, the pretensioning means can bring about a drive torque from the transfer position between the visor connection means and the helmet connection means. The visor connection means can also be linearly displaceable with respect to the helmet connection means, with the single prestressing means also causing a driving force between the visor connection means and the helmet connection means in the direction of this linear displacement movement. The single prestressing means is preferably designed as a tension spring, in particular as a rubber-elastic spring, in particular as a rubber band and/or as a rubber ring. The number of components of the device is thus reduced, as a result of which its assembly and manufacturing costs are reduced.

A device according to claim 3 can be displaced particularly reliably between the closed position and the open position, in particular from the transfer position. The prestressing force and/or the prestressing moment is to be understood as meaning the force and/or the moment generated by the at least one prestressing means and/or the force and/or the moment applied to the at least one prestressing means. Due to the fact that the prestressing force and/or the prestressing moment are at a maximum in the transfer position, an unwanted dwelling of the visor connection means in the transfer position is reliably prevented.

A device according to claim 4 ensures the displacement of the visor on the helmet in a particularly reliable manner. The driving force and/or the driving torque is understood to mean the force and/or the torque produced by the at least one prestressing means between the visor connection means and the helmet connection means. The pretensioning force and/or the pretensioning moment, in particular their amount and orientation, and/or their force application points, in particular in relation to the visor connection means and/or the helmet connection means and/or the guide means, have an influence on the driving force and/or the driving moment. Preferably, the driving moment and the driving force are effected by the at least one biasing means in the transfer position, in particular in any position between the closed position and the open position, on the visor connection means. For this purpose, the device can have a single prestressing means. For example, the biasing moment may cause the visor connector to be displaced from the transfer position to the open position and the biasing force may cause the visor connector to be displaced from the transfer position to the closed position or vice versa.

A device according to claim 5 can be adjusted particularly flexibly with regard to supporting the shifting movement of the visor on the helmet. The forces and/or torques caused by the first and the second biasing means are preferably not collinear. For example, the two prestressing means can be designed as two linear springs oriented obliquely to one another, in particular as tension springs and/or as two torsion springs arranged eccentrically to one another and/or as a torsion spring and a linear spring. The first and second prestressing means can be designed in one piece, in particular can be connected to one another with a material fit. In this case, the respective pretensioning means forms an independent functional section of a combination spring.

A device according to claim 6 ensures the displacement of the visor on the helmet in a particularly comfortable and reliable manner. The kink in the course of movement can be formed by a kink in a link guide and/or by the fact that the course of movement follows a pivoting movement starting from the transfer position into the open position and follows a linear movement into the closed position or vice versa. The formation of the kink in the course of movement reliably ensures that the visor attachment means is prestressed in the transfer position, both in the direction of the open position and in the direction of the closed position.

A device according to claim 7 is particularly robust in operation and can be produced economically. The link guide preferably includes one, in particular at least two, in particular a maximum of 3, in particular exactly two, link guides. The at least one connecting link can be a guide element, in particular a guide groove and/or a guide slot and/or a guide frame and/or a guide rail, exhibit. The at least one connecting link preferably has a guide body, in particular a sliding block. The guide element can be designed to guide the guide body in a straight line and/or in a curved shape, in particular in the shape of an arc of a circle. The guide element and the guide body are preferably formed in one piece, in particular cohesively, each with one of the two components formed by the helmet connection means and the visor connection means. For example, the helmet connection means and/or visor connection means and the respective component of the link can be produced in an injection molding process. The link guide, in particular the at least one link, can be designed as a linear guide.

A device according to claim 8 is particularly robust in operation and easy to use. For the guided displacement of the visor connection means relative to the helmet connection means, the guide means can exclusively have joints. The guide means preferably has at least one, in particular at least two, and/or a maximum of four, in particular a maximum of three, in particular a maximum of two, preferably exactly two, of the joints. The joints ensure particularly low-friction displacement and are particularly robust against dirt.

The visor attachment means is preferably attached to the helmet attachment by means of a coupling element. The coupling element can be attached to the helmet connection means via a first joint. The visor connection means can be attached to the coupling element via a second hinge. The axes of rotation of these two joints are preferably oriented parallel to one another and/or positioned at a distance from one another. A distance lies between the axes of rotation of these joints preferably in a range from 3 mm to 15 mm, in particular from 5 mm to 10 mm.

A device according to claim 9 ensures the displacement of the visor on the helmet in a particularly user-friendly manner. By displacing the visor connecting means between the closed position and the transfer position with the essentially linear displacement movement, the visor can first be moved away from the user's head from the front of the helmet. A gap between the helmet and the visor can thus be avoided. The visor can be as close as possible to the user's nose. A freedom of movement required to move the visor out of the closed position accordingly does not have to be reserved. The angle by which the visor connection means is pivoted relative to the helmet connection means when moving between the closed position and the transfer position is preferably in a range from 0° to 10°, in particular in a range from 2° to 10°.

A device according to claim 10 ensures the displacement of the visor on the helmet in a particularly comfortable manner. The displacement of the visor connecting means between the closed position and the transfer position is preferably carried out in a purely linear manner, in particular in a purely straight line. The visor can thus be shifted in the shortest possible way in front of the helmet, i.e. into the transfer position, in order to be guided from this position over the helmet, i.e. into the open position.

A device according to claim 11 is particularly easy to handle. The guide means is preferably designed to move the visor connection means relative to the helmet connection means between the transfer position and the open position exclusively rotationally, in particular to shift in the shape of a circular arc. Preferably, at the transfer position, the displacement movement transitions from a translational movement, in particular a purely translational movement, to a rotational movement, in particular a purely rotational movement.

A device according to claim 12 ensures a particularly high level of operating comfort. The angle through which the visor connection means can be pivoted relative to the helmet connection is preferably in a range from 15° to 180°, in particular from 20° to 90°, in particular from 30° to 60°, in particular from 40° to 50° and /or is a maximum of 180°. The guide means is preferably designed such that the visor is displaced relative to the helmet between the transfer position and the open position in the vertical direction by a distance in the range from 10 mm to 60 mm, in particular from 25 mm to 50 mm. The displacement in the vertical direction can also take place, at least in part, by a translational movement component of the visor relative to the helmet.

A device according to claim 13 is particularly easy to use. The handle can be attached to the visor connection means and/or the coupling element. The handle can be attached to the helmet connection means in a translational and/or rotationally displaceable manner. The handle is preferably attached to a cover, in particular formed in one piece with it. The handle and/or the guide means are preferably designed in such a way that by actuating the handle the visor connection means can be displaced relative to the helmet connection means between the closed position and the transfer position and/or between the open position and the transfer position. Advantageously, this means that to move the visor on the helmet, the visor itself does not have to be gripped, which means that visual impairment due to dirt can be avoided.

A device according to claim 14 is particularly easy to use. Due to the fact that the handle is movably mounted relative to the visor attachment means, a force conversion is made possible between the movement of the handle and the movement of the visor attachment means relative to the helmet attachment means. As a result, the visor attachment means can be shifted relative to the helmet attachment means in a particularly smooth and controlled manner. The handle is preferably connected, in particular rigidly, to a coupling element acting between the helmet connection means and the visor connection means.

A further object of the invention is to improve a head protection system, in particular to improve its operability and to ensure a particularly high level of safety during operation.

This object is achieved by a head protection system having the features of claim 15. The advantages of the head protection system correspond to the advantages of the device described above. In particular, the head protection system can be developed with at least one of the features that are described above in connection with the device. The head protection system preferably has exactly two of the devices. One of the devices is preferably arranged on both sides of the helmet and/or the visor. At least one, in particular all, axes of rotation of the devices are preferably arranged concentrically to one another.

In the closed position, the visor is preferably arranged flush with the helmet, in particular a helmet shell. In the open position, the visor is preferably arranged above its arrangement in the closed position and/or arranged above an outer surface of the helmet, in particular the helmet shell.

Fig. 1

eine Seitenansicht eines Kopfschutzsystems mit einem Helm, einem Visier und einer Vorrichtung zum Verlagern des Visiers an dem Helm, wobei die Vorrichtung in einer Verschlussstellung angeordnet ist und wobei ein Führungsmittel der Vorrichtung von einem Deckel verdeckt ist,

Fig. 2

eine Seitenansicht des Kopfschutzsystems in Fig. 1, wobei der Deckel von der Vorrichtung abgenommen ist, sodass ersichtlich ist, dass das Führungsmittel eine Kulissenführung zum Verlagern des Visiers relativ zu dem Helm aufweist,

Fig. 3

eine Seitenansicht des Kopfschutzsystems in Fig. 1, wobei die Vorrichtung in einer Transferstellung, zwischen der Verschlussstellung und einer Offenstellung angeordnet ist,

Fig. 4

eine Seitenansicht des Kopfschutzsystems in Fig. 1, wobei die Vorrichtung in der Offenstellung angeordnet ist,

Fig. 5

eine schematische Darstellung des energetischen Potentials von Antriebskräften und/oder Antriebsmomenten entlang eines Bewegungsverlaufs des Visiers relativ zu dem Helm, welche von mindestens einem Vorspannmittel der Vorrichtung zwischen einem Helmanschlussmittel und einem Visieranschlussmittel der Vorrichtung bewirkt werden,

Fig. 6

eine Seitenansicht eines Kopfschutzsystems gemäß einer weiteren Ausführungsform, wobei die Vorrichtung in der Verschlussstellung angeordnet ist und wobei das Führungsmittel zwei Gelenke zum rotatorischen Verlagern des Visiers relativ zu dem Helm um zwei parallel und exzentrisch zueinander angeordnete Drehachsen aufweist,

Fig. 7

eine Rückansicht der Vorrichtung in Fig. 6,

Fig. 8

eine Explosionsdarstellung der Vorrichtung in Fig. 6,

Fig. 9

eine Seitenansicht des Kopfschutzsystems in Fig. 6, wobei die Vorrichtung in der Transferstellung angeordnet ist,

Fig. 10

eine Rückansicht der Vorrichtung in Fig. 9,

Fig. 11

eine Seitenansicht des Kopfschutzsystems in Fig. 6, wobei die Vorrichtung in der Offenstellung angeordnet ist,

Fig. 12

eine Rückansicht der Vorrichtung in Fig. 11,

Fig. 13

eine Seitenansicht einer Vorrichtung zum Verlagern eines Visiers an einem Helm gemäß einer weiteren Ausführungsform, wobei die Vorrichtung in der Verschlussstellung angeordnet ist und wobei das Führungsmittel eine Kulissenführung zum Verlagern des Visiers relativ zu dem Helm aufweist und,

Fig. 14

eine Seitenansicht der Vorrichtung in Fig. 13, wobei die Vorrichtung in der Transferstellung angeordnet ist, und

Fig. 15

eine Seitenansicht der Vorrichtung in Fig. 13, wobei die Vorrichtung in der Offenstellung angeordnet ist.

Further features, details and advantages of the invention result from the following description of several exemplary embodiments. Show it:

1

a side view of a head protection system with a helmet, a visor and a device for moving the visor on the helmet, the device being arranged in a closed position and a guide means of the device being covered by a cover,

2

a side view of the head protection system in FIG 1 , wherein the cover is removed from the device so that it can be seen that the guide means has a slotted guide for shifting the visor relative to the helmet,

3

a side view of the head protection system in FIG 1 , wherein the device is arranged in a transfer position, between the closed position and an open position,

4

a side view of the head protection system in FIG 1 , the device being arranged in the open position,

figure 5

a schematic representation of the energetic potential of driving forces and/or driving moments along a movement of the visor relative to the helmet, which are caused by at least one pretensioning means of the device between a helmet connection means and a visor connection means of the device,

6

a side view of a head protection system according to a further embodiment, wherein the device is arranged in the closed position and wherein the guide means has two joints for the rotational displacement of the visor relative to the helmet about two axes of rotation arranged parallel and eccentric to one another,

7

a rear view of the device in FIG 6 ,

8

an exploded view of the device in 6 ,

9

a side view of the head protection system in FIG 6 , the device being arranged in the transfer position,

10

a rear view of the device in FIG 9 ,

11

a side view of the head protection system in FIG 6 , the device being arranged in the open position,

12

a rear view of the device in FIG 11 ,

13

a side view of a device for shifting a visor on a helmet according to a further embodiment, wherein the device is arranged in the closed position and wherein the guide means has a link guide for shifting the visor relative to the helmet and,

14

a side view of the device in FIG 13 , the device being arranged in the transfer position, and

15

a side view of the device in FIG 13 , wherein the device is arranged in the open position.

Based on Figures 1 to 5 a head protection system 1 according to a first embodiment is described. The head protection system 1 has a helmet 2 to protect the head and a visor 3 to protect the face, in particular the eyes. The visor 3 is displaceably attached to the helmet by means of two devices 4 . The two devices 4 are arranged symmetrically on the helmet 2, in particular symmetrically to a vertical plane oriented parallel to the user's line of sight, preferably on both sides.

The helmet 2 comprises a helmet shell 5, a shock absorber (not shown) and a chin strap (not shown).

The visor 3 has a sight glass 6 that extends continuously over both eyes. The sight glass 6 is held in a sight frame 7 . In the closed position, in which the visor 3 is closed, the visor 3 arranged flush with the outer contour of the helmet 2, in particular the helmet shell 5, with regard to its outer contour.

The two devices 4 each have a helmet connection means 8 , a visor connection means 9 , a guide means 10 and a single pretensioning means 11 . The helmet connection means 8 is firmly, in particular permanently, connected to the helmet 2, in particular the helmet shell 5. The visor connection means 9 is firmly, in particular permanently, connected to the visor frame 7 . A cover 12 of the device 4 covers the helmet connection means 8 and the visor connection means 9 at least partially and the guide means 10 completely.

The guide means 10 in the Figures 2 to 4 is shown in more detail is designed for the guided displacement of the visor connection means 9 relative to the helmet connection means 8 . The guide means 10 comprises a link guide with a first guide link 13 and a second guide link 14. The two guide links 13, 14 each have a guide element 15, 16 and a guide body 17, 18 displaceably mounted therein or on it. The first guide element 15 is designed as a straight guide slot, in particular in the form of an elongated hole, in the helmet attachment means 8 . The first guide body 17 is designed as a bolt, in particular as a pin, on the visor connection means 9 . The second guide element 16 is designed as a guide frame with a linear section and a section in the shape of a sector of a circle on the helmet connection means 8 . The second guide body 18 is designed as a bar-shaped section of the visor connection means 9, to which the first guide body 17 is also attached.

The guide means 10, in particular the two guide links 13, 14, are designed in such a way that the visor connection means 9 can be displaced in a straight line relative to the helmet connection means 8 between the closed position and a transfer position. Furthermore, the guide means 10, in particular the guide links 13, 14, are designed such that the visor connection means 9 is rotatably mounted relative to the helmet connection means 8 between the transfer position and an open position in which the visor 3 is open. The transfer position is arranged between the open position and the closed position. From the transfer position, the visor connection means 9 can be displaced relative to the helmet connection means 8 both in a straight line in the direction of the closed position and in a rotational manner in the direction of the open position.

Between the closed position and the transfer position, the visor connection means 9 can be displaced relative to the helmet connection means 8 along a viewing direction of the user by a guide length d in a range from 5 mm to 30 mm, in particular from 15 mm to 25 mm. Between the transfer position and the open position, the visor connection means 9 can be pivoted relative to the helmet connection means 8 by a guide angle α in a range from 25° to 90°, in particular from 35° to 60°.

The guide means 10 has a guide resistor 19 which is designed in particular for the user to feel the transfer position. The guide resistor 19 comprises two snap-in lugs 20 arranged on the helmet connection means 8, in particular on the second guide element 16, in particular designed or mounted elastically, which cooperate with a snap-in web 21 designed on the visor connection means 9. The guide resistor 19 is designed in such a way that in order to move the visor connection means 9 relative to the helmet connection means 8 between the closed position and the transfer position, in particular directly adjacent to the transfer position, a resistance has to be overcome. As a result, the transfer position is identified by the user in a tactile manner.

In order to limit the displaceability of the visor connection means 9 relative to the helmet connection means 8 in the closed position, the guide means 10 has a first end stop 22 . The guide means 10 has a second end stop 23 to limit the ability to be displaced in the open position. Both end stops 22, 23 are formed by the second guide link 14.

The only prestressing means 11 is in the form of a tension spring made of a rubber-elastic material, in particular in the form of a rubber band. The pretensioning means 11 acts between the visor connection means 9 and the helmet connection means 8, in particular between two anchor elements 24, 25 arranged thereon. The pretensioning force F exerted by the pretensioning means 11 acts between the first anchor element 24 and the second anchor element 25.

The visor connection means 9 can be pivoted about a rotation axis 26 relative to the helmet connection means 8 between the transfer position and the open position. The axis of rotation 26 is arranged concentrically to the first guide body 17, in particular the guide pin, and to the section of the second guide element 16 in the shape of a sector of a circle. The prestressing force F acts eccentrically to the axis of rotation 26 on the visor connection means 9. A distance b between the vector of the prestressing force F and the axis of rotation 26 is in a range from 2 mm to 20 mm, in particular this is 5 mm.

In the transfer position, the prestressing force F causes a driving force F _A between the helmet connection means 8 and the visor connection means 9, which prestresses the visor connection means 9 into the closed position, ie wants to convert it into the closed position. The drive force F _A has a force component oriented parallel to the movement path between the closed position and the transfer position. Furthermore, the prestressing force F in the transfer position causes _a drive torque MA between the helmet connection means 8 and the visor connection means 9, which prestresses the visor connection means 9 into the open position, ie wants to transfer it into the open position. The drive torque M _A favors a rotary movement from the transfer position to the open position. As a result, the visor connection means 9 arranged in the transfer position is pretensioned both in the direction of the closed position and in the direction of the open position. In the transfer position, the prestressing force F, in particular the driving force F _A and the driving torque M _A , is at its maximum.

The functions of the head protection system 1 and the device 4 are as follows:
The head protection system 1 is attached to the user's head and the visor 3 and the visor connection means 9 are in the closed position. The pre-tensioning means 11 is tensioned and generates the pre-tensioning force F.

To move the visor 3 into the open position, the visor 3 can be gripped by the hand on the visor frame 7 and moved forward, in particular in the user's line of sight. Here, the visor connection means 9 is linearly displaced in the direction of the transfer position against the driving force F _A produced by the prestressing means 11 between the helmet connection means 8 and the visor connection means 9 . In this case, the visor 3, in particular the visor connection means 9, is guided in a straight line on the guide means 10, in particular along the guide links 13, 14, between the closed position and the transfer position. Before the transfer position is reached, the resistance force caused by the guide resistor 19 must be overcome. Here, the latching lugs 20 are elastically deformed until the latching web 21 can slide past the latching lugs 20 . The visor 3, in particular the visor connection means 9, is in the transfer position. The driving force F _K , which biases the visor connecting means 9 into the closed position, is at a maximum. In the transfer position, the driving force F _K is preferably in a range from 5 N to 20 N.

In the transfer position, the guide means 10 releases a pivoting movement of the visor connection means 9 relative to the helmet connection means 8 about the axis of rotation 26 . The drive torque M _A produced by the prestressing means 11 between the helmet connection means 8 and the visor connection means 9 prestresses the visor connection means 9 into the open position. In the transfer position, the drive torque M _A is at its maximum. The drive torque M _A in the transfer position is preferably in a range from 0.01 Nm to 1 Nm, in particular from 0.05 Nm to 0.2 Nm.

The guide resistance 19 ensures that the arrangement of the visor 3 in the transfer position is reliable for the user, in particular also when operating with gloves, can be reliably detected. Because the visor connection means 9 is pre-stressed in the transfer position, in particular at the same time, both into the closed position and into the open position, the ease of use is further improved. In particular, the shifting of the visor connection means 9 between the closed position and the open position beyond the transfer position can take place particularly reliably and continuously.

In the figure 5 shows the energetic potential Φ over the position x along the course of movement of the visor connection means 9 relative to the helmet connection means 8 for the driving force F _A and the driving moment M _A . The closed position is identified by the number I, the transfer position by the number II and the open position by the number III.

In the closed position and in the open position, the visor connection means 9 rests against the end stops 22, 23, as a result of which the energetic potential Φ of both the driving force F _A and the driving torque M _A is zero there. Between the closed position and the transfer position, the visor connection means 9 cannot rotate relative to the helmet connection means 8 in the direction of the drive torque M _A , as a result of which the associated energetic potential Φ remains zero. The same applies equally to the energetic potential due to the driving force F _A between the transfer position and the open position.

Due to the tensioning of the pretensioning means 11 when the visor connection means 9 is displaced from the closed position into the transfer position, the energetic potential Φ increases suddenly and then steadily until the transfer position is reached. Between the transfer position and the open position, the linear movement in the direction of the driving force F _A is blocked. The maximum drive torque M _A in the transfer position steadily decreases from the transfer position to the open position. The same applies to the energetic potential Φ due to the drive torque M _A , this energetic potential becoming zero in the open position due to the end stop 23 .

From the figure 5 It can be seen that the biasing means 11 biases the visor connection means 9 arranged in the transfer position both in the direction of the open position and in the direction of the closed position.

Based on Figures 6 to 12 another exemplary embodiment of the head protection 1, in particular the device 4, is described. In contrast to the exemplary embodiment described above, the visor 3 is designed in one piece, in particular in one piece. The visor 3 is reversibly detachably connected to the visor connection means 9 . In particular, the visor connection means 9 is inserted directly into a recess in the visor 3 . The device 4 has two prestressing means 11a, 11b, which are designed as torsion springs, in particular made of spring steel. The prestressing means 11a, 11b are in the form of spiral springs. The guide means 10 is designed for the purely articulated connection of the visor connection means 9 to the helmet connection means 8 . The guide means 10 therefore does not include a slotted guide. Furthermore, the device 4 has a handle 27 for moving the device 4, in particular the visor connection means 9, from the closed position into the transfer position, in particular into the open position. The handle 27 is formed in one piece with the cover 12, in particular in a materially bonded manner.

The visor connection means 9 is connected to the helmet connection means 8 via a coupling element 28 . The cover 12 with the handle 27 is rigidly connected to the coupling element 28 by means of a fastening bolt 29 and an axle bolt 30 . The cover 12 and the coupling element 28 are mounted on the helmet connection means 8 so as to be rotatable about a first axis of rotation 26a via the axle bolt 30 . The ring-shaped visor connection means 9 is rotatably mounted on the coupling element 28 about a second axis of rotation 26b. The second axis of rotation 26b is oriented parallel to the first axis of rotation 26a. A center distance c between the two axes of rotation 26a, 26b is in a range from 3 mm to 15 mm, in particular this is 5 mm.

The guide means 10 includes two joints 31a, 31b with the two axes of rotation 26a, 26b and a guide unit 32. The guide unit 32 includes a guide edge 33 and a guide body 34. The guide edge 33 is formed by the helmet attachment means 8 and is designed to guide the guide body 34 on one side . The guide body 34 is in one piece, in particular integrally connected to the visor connection means 9 . At the two ends of the leading edge 33 end stops 22, 23 are formed.

The first pretensioning means 11a causes a pretensioning moment M ₁ and thus a corresponding drive torque M _A,1 about the first axis of rotation 26a between the helmet connection means 8 and the visor connection means 9, in particular the coupling element 28. The second pretensioning means 11b causes a pretensioning moment M ₂ and thus a corresponding one Drive torque M _A,2 about the second axis of rotation 26b between the visor attachment means 9 and the helmet attachment means 8, in particular the coupling element 28. The first preload torque M ₁ and the second preload torque M ₂ are oriented in such a way that the coupling element 28 is prestressed into the closed position by both drive torques M _A,1 , M _A,2 .

The functioning of the head protection system 1 and the device 4 according to the embodiment described above is as follows:
The visor 3 and the device 4, in particular the visor connection means 9, are initially in the closed position, in which the guide body 34 rests against the first end stop 22. The grip 27 horizontally extends from the second pivot shaft 26b.

In order to move the visor connecting means 9 into the transfer position, the handle 27 is pivoted downwards by the user's hand, in particular into an approximately vertical orientation. As a result, the coupling element 28, which is rigidly connected to the handle 27, is pivoted about the first axis of rotation 26a against the prestressing force of the first prestressing means 11a, in particular also of the second prestressing means 11b. The visor attachment means 9 articulated to the coupling element 28 is taken along by the coupling element 28 . The guide body 34 attached to the visor connecting means 9 is prestressed against the guiding edge 33 by means of the second prestressing means 11b. The guide body 34 slides along the guide edge 33 into the transfer position.

In the transfer position, the first prestressing means 11a causes the drive torque M _A,1 , which prestresses the sight attachment means 9 via the coupling element 28 into the closed position. Furthermore, the second prestressing means 11b causes the drive torque M _A,2 , which prestresses the visor connection means 9 into the open position.

The fact that the handle 27 is still held by the user in the transfer position prevents the visor connection means 9 from being returned to the closed position. The second biasing means 11b causes the visor connection means 9 to be displaced into the open position. In the open position, the guide body 34 rests against the second end stop 23 .

In the transfer position, the energetic potential Φ of a displacement movement into the closed position or into the open position is not equal to zero due to the two drive torques M _A,1 , M _A,2 . In the closed position and in the open position, the respective energetic potential is zero.

Based on Figures 13 to 15 another embodiment is described. In contrast to the first embodiment described, the prestressing means 11 is not designed as a tension spring but as a bending spring. The single prestressing means 11 is designed in one piece, in particular without any material separation, and comprises two functional sections 35a, 35b. The first functional section 35a causes a prestressing force F in the manner of a compression spring via two legs 36a, 36b and thereby a corresponding driving force F _A between the helmet connection means 8 and the visor connection means 9 for shifting the visor connection means 9 into the closed position.

The second functional section 35b causes a pretensioning torque M and thereby _a corresponding drive torque MA between the helmet connection means 8 and the visor connection means 9 for pretensioning the visor connection means 9 in the open position. This is in the transfer position Visor connection means 9 are prestressed by means of the prestressing means 11 both in the closed position and in the open position.

Due to the fact that the pretensioning means 11 is designed in one piece, but pretensions the previous connection means 9 both in the closed position and in the open position and for this purpose exerts the pretensioning force F and the pretensioning moment M on the visor connection means 9, the device 4 is structurally particularly simple in construction and economically manufacturable.

The functioning of the head protection system 1 and the device 4 corresponds to the functioning of the head protection system 1 and the device 4 according to the embodiments described above.

What the above embodiments have in particular in common is that their guide means 10 ensure a course of movement of the visor connection means 9 relative to the helmet connection means 8 which has a kink 37 in the transfer position. In particular, this means that the visor connection means 9 can be preloaded in the transfer position both in the direction of the closed position and in the direction of the open position.

The head protection system 1 and the device 4 advantageously ensure that the visor 3 or the respective visor connection means 9 can be displaced particularly reliably, continuously and comfortably between the closed position and the open position relative to the helmet 2 or the helmet connection means 8 . The guide means 10 and the pretensioning means 11 are also particularly simple in construction, as a result of which the device 4 and the head protection system 1 can be produced particularly economically.

Claims (15)

Device (4), in particular a visor mechanism, for shifting a visor (3) on a helmet (2). 1.1. a helmet connection means (8) for connecting the device (4) to the helmet (2), 1.2. a visor connection means (9) for connecting the device (4) to the visor (3), 1.3. a guide means (10) for guided displacement of the visor connection means (9) relative to the helmet connection means (8) between 1.3.1. a closed position in which the visor (3) is closed, 1.3.2. an open position in which the visor (3) is open, and 1.3.3. a transfer position, between the closed position and the open position, and 1.4. at least one biasing means (11, 11a, 11b) for biasing the visor connection means (9) arranged in the transfer position in the direction of the closed position and in the direction of the open position. Device (4) according to claim 1, characterized by a single biasing means (11). Device (4) according to Claim 1 or 2, characterized in that a pretensioning force (F) generated by the at least one pretensioning means (11, 11a, 11b) and/or a pretensioning torque generated by the at least one pretensioning means (11, 11a, 11b). (M ₁ , M ₂ ) are maximum in the transfer position. Device (4) according to one of the preceding claims, characterized in that in the transfer position the at least one pretensioning means (11, 11a, 11b) between the helmet connection means (8) and the visor connection means (9) generates a driving force (F _A ) and a driving torque ( M _A ) causes. Device (4) according to one of the preceding claims, characterized in that in the transfer position a first pretensioning means (11a) between the helmet connection means (8) and the visor connection means (9) generates a first drive force (F _A ) and/or a first drive torque (M _A , M _A,1 ) in the direction of the closed position and a second biasing means (11b) causes a second drive force (F _A ) and/or a second drive torque (M _A,2 ) between the helmet connection means (8) and the visor connection means (9) effected in the direction of the open position. Device (4) according to one of the preceding claims, characterized by a course of movement of the visor connection means (9) relative to the helmet connection means (8) in the transfer position has a kink (37). Device (4) according to one of the preceding claims, characterized in that the guide means (10) has at least one link guide (13, 14) for guided displacement of the visor connection means (9) relative to the helmet connection means (8). Device (4) according to one of the preceding claims, characterized in that the guide means (10) has at least one joint (31a, 31b) for guided displacement of the visor connection means (9) relative to the helmet connection means (8). Device (4) according to one of the preceding claims, characterized in that the guide means (10) is designed in such a way that the visor connection means (9) when shifting between the closed position and the transfer position by an angle (α) of at most 5° relative to the Helmet connection means (8) is pivoted. Device (4) according to one of the preceding claims, characterized in that the guide means (10) is designed for purely translatory, linear displacement of the visor connection means (9) relative to the helmet connection means (8) between the closed position and the transfer position. Device (4) according to one of the preceding claims, characterized in that the guide means (10) is designed for pivoting the visor connection means (9) relative to the helmet connection means (8) between the transfer position and the open position. Device (4) according to one of the preceding claims, characterized in that the guide means (10) for pivoting the visor connection means (9) relative to the helmet connection means (8) between the transfer position and the open position by an angle (α) of at least 15° is. Device (4) according to one of the preceding claims, characterized by a handle (27) for moving the visor (3) between the closed position and the open position. Device (4) according to Claim 13, characterized in that the handle (27) is movably mounted relative to the visor connection means (9). Head protection system (1), comprising 15.1. a helmet (2) and/or a visor (3), and 15.2. at least one device (4) according to one of Claims 1 to 14, which is connected to the helmet (2) by means of the helmet connection means (8) and/or is connected to the visor (3) by means of the visor connection means (9).

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