Input device

Abstract

The invention relates to an input device (1) for inputting control commands into a digital computer (2), comprising an input element (4) which is received on a base in such a way that the input element can be displaced relative to said base, and a brake unit (6) for influencing a displacement resistance of the input element (4) relative to the base (3). The brake unit (6) comprises a first coil (7) for generating a first magnetic field, having a first coil axis (8), and a first friction surface (9) coupled to the base (3) and a second friction surface (10) coupled to the input element (4), wherein a pressing force of the first friction surface (9) against the second friction surface (10) can be changed by means of the first magnetic field generated by the first coil (7) such that the displacement resistance of the input element (4) can be influenced. The device further comprises a vibration unit (11) for generating a vibration of the input element (4), which vibration unit has a vibration body (12), and a second coil (13) for generating a second magnetic field, having a second coil axis (14), wherein the vibration body (12) is coupled to a magnet arrangement (15) and can be caused to vibrate by means of the second magnetic field.

Description

[0001] INPUT DEVICE

[0002] The invention relates to an input device for inputting control commands into a digital computer, comprising an input element mounted on a base and displaceable relative thereto, and a braking unit for influencing a resistance to displacement of the input element relative to the base. The braking unit comprises a first coil for generating a first magnetic field, having a first coil axis, as well as a first friction surface coupled to the base and a second friction surface coupled to the input element. The first magnetic field generated by the first coil can be used to vary a contact force between the first friction surface and the second friction surface, thereby influencing the resistance to displacement of the input element. Furthermore, it comprises a vibration unit for generating a vibration of the input element.

[0003] Input devices with perceptible feedback are generally known from the prior art, e.g., in control systems, in simulation processes, or even in computer games. This is so-called force feedback, in which feedback perceptible to a user is generated on at least one input element, so that the user experiences, for example, resistance depending on a particular situation or control behavior. This feedback can include vibrations and resistances, which are haptically perceived by the user on the input device when a particular input element is operated, and which can also be further influenced or changed during this state, so that the resistances or vibrations become stronger or weaker.

[0004] The input elements can include all movable elements from the state of the art, such as levers, for example joysticks, individual keys on keyboards, as well as buttons on controllers, etc.

[0005] EP3037144 A1, for example, discloses a haptic peripheral device comprising a housing and an input element; as well as a magnetic actuating element arranged in the housing, wherein the magnetic actuating element comprises a first programmable magnet attached to the input element and a second programmable magnet arranged in the housing. The programmable magnets each have a preprogrammed pattern of magnetic elements that interact with each other to output haptic effects to the input element.The pre-programmed pattern of the second magnet is movable relative to the pre-programmed pattern of the first magnet such that when the second magnet is in a first configuration, a first haptic effect is output to the input element, and when the second magnet is in a second configuration, a second haptic effect is output to the input element, wherein the first and second haptic effects are different from each other.

[0006] A disadvantage of the state of the art, however, is that the integrated mechanisms for generating the force feedback functions on the input elements are often composed of complex control systems and also require a large amount of space within the input devices.

[0007] The object of the present invention was to overcome the disadvantages of the prior art and to provide an input device by means of which a user is able to provide a simple yet reliable implementation of a force feedback function, which enables a particularly compact arrangement.

[0008] This object is achieved by a device and a method according to the claims.

[0009] The device according to the invention is characterized in that the vibration unit comprises a vibration body and a second coil for generating a second magnetic field with a second coil axis, wherein the vibration body is coupled to a magnet arrangement so that the vibration body can be set into vibration by means of the second magnetic field.

[0010] The inventive design enables a particularly compact arrangement of the components required for vibration and displacement resistance. Furthermore, it allows for the smallest possible number of moving components to be provided for generating controllable force feedback, thereby resulting in a particularly reliable input device.

[0011] Reducing the mass and the associated inertia of the input element can prove advantageous, for example, to enable more precise haptic properties, such as movements induced by the user, as well as feedback from the input device. Furthermore, the additional components used for the coils, such as electromagnets, such as ferromagnetic bodies, can be used at least partially for both the first and second coils, thus enabling an even more compact arrangement.

[0012] Furthermore, the first and second coils can be attached together to a coil body.

[0013] The control commands and associated components for executing and initiating the respective functions (preferably by a digital computer) with regard to vibration and displacement resistance can thus be designed in a particularly similar manner, since both functions can be carried out by energizing a respective coil.

[0014] The vibration body is preferably mounted on the input element.

[0015] Preferably, the magnet arrangement may comprise at least one permanent magnet. Permanent magnets can be used to realize a simple and cost-effective design for generating the oscillation using the second magnetic field.

[0016] A magnetic field of the permanent magnet(s) interacts with the moving charge of the second coil, so that their interaction with each other can move the vibrating body in one direction. By changing the direction of the moving charge and / or by resetting the vibrating body, an oscillation of the vibrating body or the input element coupled to it can be generated. The permanent magnet(s) can be formed on and / or in the vibrating body, or the vibrating body can also be formed at least partially from permanent magnets.

[0017] For example, a permanent magnet can be provided, which can be moved in one direction by energizing the (second) coil and moved in the opposite direction by a reset arrangement. Furthermore, several permanent magnets can also be provided, e.g., two, each of which can be alternately displaced in two directions by changing the current supply to the coil, so that the vibrating body moves back and forth when the direction of the charge changes.

[0018] To move the vibrating body (based on the magnet arrangement), the Lorentz force or the reluctance force acting in the magnetic field can be used. The magnetic field of the magnet arrangement is influenced by the second coil (or the moving charge due to the current supplied to the coil), thereby causing the vibrating body to move.

[0019] Preferably, the second coil can be energized by alternating current, with the oscillation of the vibrating body depending on the frequency and current intensity of the alternating current. Thus, by increasing the frequency of the alternating current, the frequency of the oscillation of the vibrating body and the resulting vibration at the input element can be increased, or by decreasing the frequency, the frequency of the oscillation can be reduced. The respective deflection or the amplitude of the oscillation (or the resulting force) can be increased by adjusting the current intensity.

[0020] For example, with alternating current applied to the second coil, a repeated reversal of the evoking force (via the magnetic field of the magnet array) can cause the vibrating body to oscillate. The current strength determines the magnitude of the (respective) evoking force, or a corresponding deflection of the vibrating body (in a particular direction). The frequency of the alternating current controls the duration of each deflection of the vibrating body, which thus decreases at higher frequencies.

[0021] Furthermore, a magnetic attraction force can also be used by positioning the second coil relative to the magnet arrangement so that it attracts or repels the magnet arrangement when energized.

[0022] For the sake of completeness, it should be mentioned that it would also be possible to energize the second coil by means of direct current in order to provide the effects described above, for example, only in one direction, and to carry out the movement in the opposite direction, for example by means of a reset arrangement or the like.

[0023] A possible further development provides that at least two permanent magnets are arranged between the vibrating body and the second coil and are aligned opposite to each other with respect to their respective magnetic poles in a direction along the second coil axis.

[0024] According to one possible embodiment, the magnet arrangement can be electromagnetic, in particular comprising at least two electromagnets. Using electromagnet(s), it is possible to provide an additional influencing factor regarding the vibration of the vibrating body, allowing it to be controlled more variably and flexibly.

[0025] One possible embodiment provides for the first coil axis and the second coil axis to be arranged parallel to each other. In a further development, the coil axes can also be arranged concentrically to each other.

[0026] Furthermore, it can be provided that the second coil is arranged on the coil core of the first coil.

[0027] In addition, it can be provided that the second coil has a low overall height and is preferably designed in the form of a flat air coil.

[0028] It can be particularly advantageous if the vibrating body is mounted so that it can move relative to a vibration axis (relative to the input element) with respect to the vibration. Furthermore, the vibrating body can preferably be positively guided relative to the vibration axis, so that only a movement along the vibration axis is provided to generate the vibration, or the vibrating body can only move along one direction of movement relative to the vibration axis, e.g., along a direction of rotation (around the vibration axis).

[0029] Furthermore, it can be provided that the displacement direction of the input element is linear, and that the vibration axis and the displacement direction are parallel to each other. It can also be provided that the displacement direction is circular or arcuate, and that the vibration axis is arranged tangentially to a radius of the displacement direction.

[0030] With regard to the direction of displacement, it should be additionally mentioned that this relates to a part of the input element which interacts with the braking unit and the vibration unit (or the base), so that the input element can comprise further joints or movable elements which can, for example, convert a rotational movement acting on the input element (on the user side) into a linear movement, so that the direction of displacement can be linear within the input device and a different direction of movement occurs outside, e.g. on a surface facing the user or on a part of the input element, by means of which the relative displacement is initiated. Preferably, a transmission arrangement can be provided on the input element (facing away from the base) for converting movements, by means of which transmission arrangement a movement on the input element is converted into a movement of the input element with respect to the direction of displacement.It should be mentioned that the transmission arrangement preferably transmits the vibration of the vibrating body without damping.

[0031] The displacement direction and the direction of the vibration of the vibrating body (preferably along the vibration axis) can preferably be selected such that the oscillation or vibration acts in the same direction as the displacement direction, so that, for example, a most perceptible vibration can be generated relative to the displacement of the input element. However, it should be noted at this point that the direction of the oscillation (especially the vibration axis) can also be oriented differently, e.g., perpendicular to the displacement direction.

[0032] Furthermore, it can preferably be provided that the vibration axis is arranged perpendicular to the second coil axis. Such a configuration allows for a particularly harmonious generation of the oscillation with respect to the magnetic field generated by the second coil, or the resulting Lorentz force.

[0033] Alternatively, it can be provided that the vibration axis is inclined at an angle of more than 90°, in particular 91° to 100°, to the second coil axis.

[0034] In another embodiment, it can be provided that the vibration axis is arranged parallel to the second coil axis.

[0035] According to an advantageous embodiment, the vibrating body can be mounted by means of two spring elements, in particular flat springs, arranged opposite one another with respect to the vibrating body. Preferably, the vibrating body can be mounted by means of the spring elements at two axial end points of the vibrating body located opposite one another along the vibration axis. Preferably, the spring elements can be designed such that they are elastically deformable only in one direction (corresponding to the oscillation along the vibration axis).

[0036] The spring elements can, for example, comprise a spiral shape with a spiral-shaped web, or several spiral-shaped webs, which are / are preferably elastically deformable along or parallel to a central axis of the spiral. By increasing the number of (elastic) webs of the flat springs, improved stability of the vibrating body can be achieved against unwanted displacement in a direction other than that of the vibration, as well as improved transmission of the vibration to the input element.

[0037] Such a design of the spring elements also has the advantage that the mounting of the vibrating body with respect to the direction of vibration does not require additional bearing elements arranged so as to be movable relative to one another, thus preventing losses due to friction. Furthermore, the vibration can be optimally transmitted to the input element via the spring elements. The spring elements are preferably rigidly mounted or attached to the input element in one area (and connected to the vibrating body in another area, with an intermediate section being elastically deformable).

[0038] Furthermore, it can be provided that the spring elements (preferably in an undeformed state) extend in a direction perpendicular to the vibration axis. Such a design enables particularly simple mounting of the vibrating body with respect to its vibration. The (elastic) deformation direction of the spring elements is preferably along the vibration direction or perpendicular to their extension direction. The central axis of a previously mentioned spiral shape is preferably parallel, in particular concentric, to the vibration axis.

[0039] The spring elements can, for example, be made of spring steel.

[0040] However, it can also be provided that the spring elements are formed in one piece with the input element; furthermore, they can also be formed from plastic.

[0041] Furthermore, the vibrating body can comprise a housing, e.g. made of plastic, which can be connected to the spring elements, in particular pressed or caulked.

[0042] Regarding the arrangement of the second coil, it can be provided that the second coil is arranged on the base, or that the second coil is arranged on the input element and is displaceable with it relative to the base. Furthermore, the first coil can be arranged on the input element and designed to be displaceable with it relative to the base. Alternatively, the first coil can be arranged on the base and preferably cannot be displaced with respect to the relative displacement of the input element to the base.

[0043] Arranging the first and / or second coil at the base offers the advantage of reducing the weight / mass of the input element, making it easier to manipulate the input element, and generally reducing the inertia of the input element. Furthermore, the components required to energize the coils can be designed more simply (e.g., the components required for energization can also be fixed or located at the base).

[0044] Arranging the first and / or second coil on the input element has the primary advantage of allowing better utilization of the available space for the input elements, since the coil forms part of the input element. Furthermore, the functions of displacement resistance and vibration can be more easily combined, as can the components required for generating the magnetic fields.

[0045] In particular, it can be provided that the displacement of the input element relative to the base is a rectilinear displacement. The displacement direction can thus be straight or linear.

[0046] Furthermore, the input device can include a detection means for detecting a displacement of the input element. The detection means can also be installed outside the input device, and the displacement of the input element can be detected by an external sensor—for example, by optical sensors and / or by proximity sensors, such as a Hall sensor. Contact sensors are also possible; with regard to detection, reference is generally made to the prior art.

[0047] The detection means can be designed to detect the incremental or absolute position of the input element relative to the base. In an alternative variant, the detection means can be designed to detect end positions and / or intermediate positions of the input element relative to the base. The displacement resistance of the input element can be influenced by varying the current strengths when energizing the first coil (preferably using direct current). This can be achieved by influencing the magnetic field generated by varying the current strengths when energizing the first coil.

[0048] Furthermore, it can be provided that the input device has a coating in the area of ​​the friction surfaces, which serves to increase the coefficient of friction and / or to protect the components that can be moved against one another from corrosion. In addition, a respective (first or second) friction surface can be formed by means of a coating, in particular the coating can be ferromagnetic. This has the advantage that this measure can achieve improved functionality. In particular, this measure can prevent the first friction surface from rusting onto the second friction surface, as a result of which good functional retention of the input device can be achieved over its service life. Furthermore, this measure can harden the surface, as a result of which wear can be reduced. A ferromagnetic coating can achieve an improved course of the magnetic field lines.

[0049] Furthermore, it can be provided that the first or second friction surface is formed on the coil core (of the first coil), and that a friction element and the coil core are positioned relative to one another such that, when the coil is energized, the friction element is pressed against the coil core, with the magnetic field being conducted through the coil core and the friction element. This has the advantage that this measure can create solid-state friction between the friction element and the coil core. This allows for a simple design of the input device. Furthermore, the input device with this design can be highly effective.

[0050] Furthermore, it can be provided that the coil or the coil core has a coil core coating which serves to increase the coefficient of friction and / or to protect the iron core from corrosion, in particular that the second friction surface is arranged on the coil core coating, in particular that the coil core coating is ferromagnetic. This has the advantage that this measure can achieve improved functionality. In particular, this measure can prevent rusting of the first friction surface on the second friction surface, whereby good functional retention of the friction damper can be achieved over its service life. Furthermore, this measure can harden the surface, whereby wear can be reduced. A ferromagnetic coating can achieve an improved course of the magnetic field lines.

[0051] Furthermore, a return spring can be provided to return the input element to its initial position. This has the advantage that this measure allows for a simple symmetrical return of the input element, thus preventing jamming of the input element.

[0052] Preferably, it can be provided that when the first coil is energized, the contact force of the first friction surface against the second friction surface is increased, thus increasing the displacement resistance of the input element. This has the advantage that when the first coil is de-energized, the displacement resistance of the input element can be low. Thus, energization is only necessary when the displacement resistance of the input element is to be increased. This results in a particularly energy-efficient operation.

[0053] In an alternative embodiment, it can be provided that when the first coil is energized, the contact force of the first friction surface on the second friction surface is reduced and thus the displacement resistance of the input element is reduced. This is particularly advantageous if a high displacement resistance is desired as standard and the displacement resistance is only to be reduced in certain exceptional cases. When the first coil is energized, the first friction surface and the second friction surface can be moved away from each other by the generated magnetic field (e.g. by means of a permanent magnet). In particular, it can be provided that the first friction surface and the second friction surface are pretensioned towards each other by means of a spring element and pressed against each other.Furthermore, a permanent magnet can be arranged for this purpose, by means of which the friction surfaces are pressed against one another, and which is repelled by the generated magnetic field when the first coil is energized, so that the friction partners distance themselves.

[0054] Furthermore, it can be provided that the energization of the coil(s) is specified by the digital computer when the input element is moved to a specific position by a user, which is detected by the detection means. This has the advantage that this measure allows the input element to have a first displacement resistance in a specific displacement range and a second displacement resistance in a further displacement range, which is different from the first displacement resistance. The distribution of these displacement ranges or the position of the input element at which the first coil is energized can be individually specified as required.

[0055] Furthermore, the braking unit can be dimensioned such that, starting at a current threshold of the coil within the operating range, the braking effect is greater than the return force of the return spring. This has the advantage that this measure allows the input element to be held in any position from the rest position until actuation. Thus, the input element can remain in an actuated position.

[0056] Furthermore, the braking unit can be designed in such a way that the current position can also be held by means of an additional external force (e.g. a finger force), so that a mechanical stop can be simulated by the displacement resistance, or a type of locking.

[0057] A copper material can be used as the material for the coil(s).

[0058] A ferromagnetic material can be used for the coil core. This could be, for example, an iron material. For the sake of completeness, it should be mentioned that the second coil can also, in principle, have such a coil core.

[0059] A ferromagnetic material can be used as the outer shell of the coil(s). This could, for example, be an iron material.

[0060] A ferromagnetic material can be used for the friction element or friction surfaces. This can be, for example, an iron material. Furthermore, the friction element can also be composed of several parts, with different materials being used for the individual parts. In particular, a part made of an iron material can be embedded in a part made of a plastic material.

[0061] A plastic can preferably be used as the material for the base. A plastic can also be used as the material for the input element. In particular, the key carrier can be made of a plastic material. Furthermore, the key can also be made of a plastic material.

[0062] In general, the respective current intensity (or also the frequency in the case of alternating current) can be specified by the digital computer with regard to the current supply to the first and / or second coil, so that it can be determined, for example, by a program or an application on the digital computer.

[0063] Furthermore, it can additionally be provided that at least one sensor is integrated in the input device, which detects a force acting externally on the input element (e.g. finger pressure of a user, or a palm of the hand, etc.) and additionally determines the current intensity (and / or frequency, if applicable) depending on the external force.

[0064] For a better understanding of the invention, it is explained in more detail using the following figures.

[0065] They show in a highly simplified, schematic representation:

[0066] Fig. 1 A possible input device in a diagrammatic representation;

[0067] Fig. 2 shows an input device in sectional view.

[0068] Fig. 3 shows the input device according to Fig. 2 in a further position;

[0069] Fig. 4 shows another embodiment of an input device;

[0070] Fig. 5 shows a further embodiment of an input device;

[0071] Fig. 6 shows a possible embodiment of the vibration unit;

[0072] Fig. 7 shows a possible embodiment of the brake unit;

[0073] Fig. 8 shows a possible embodiment of a spring element;

[0074] Fig. 9 shows another possible embodiment of an input device;

[0075] Fig. 10 shows another possible embodiment of an input device; Fig. 11 shows an input element with a transmission arrangement.

[0076] By way of introduction, it should be noted that in the variously described embodiments, identical parts are provided with identical reference symbols or component designations. The disclosures contained throughout the description can be applied analogously to identical parts with identical reference symbols or component designations. Furthermore, the positional information chosen in the description, such as top, bottom, side, etc., refers to the directly described and illustrated figure, and these positional information must be applied analogously to the new position in the event of a change in position.

[0077] Fig. 1 shows a possible embodiment of an input device 1 for inputting control commands into a digital computer 2. This input device 1 can be designed, for example, in the form of a button, or also in the form of a joystick. Furthermore, the input device 1 can include a power supply by means of which it is supplied with power.

[0078] In particular, it can be provided that the current intensity can be varied, thereby also varying the displacement resistance of the input element. Depending on the specified current modes, a wide variety of haptic feedback can be provided to the user. The same applies to the second coil, where, for example, the frequency of the alternating current can also be adjusted.

[0079] The input device 1 comprises a base 3 and an input element 4, which is mounted on the base 3 so as to be displaceable thereon, preferably along at least one displacement direction 5.

[0080] The displacement direction 5 of the input element 4 can be linear, but can also have other path shapes, e.g. circular or circular arc-shaped, as well as spiral, etc., as well as combinations thereof.

[0081] As can be seen in Fig. 1, the input element 4 can be positively guided in a linear manner with respect to its direction of displacement, for example by means of a guide unit of the base 3. Furthermore, the input device 1 comprises a braking unit 6 for influencing a resistance to displacement of the input element 4 relative to the base 3 (with respect to the direction of displacement). The braking unit comprises a first friction surface coupled to the base 3, and a second friction surface coupled to the input element 4, which will be explained in more detail later. Furthermore, the braking unit 6 comprises a first coil 7 for generating a first magnetic field, having a first coil axis and a coil core; wherein, by means of the first magnetic field generated by the first coil 7, a contact force of the first friction surface against the second friction surface can be changed, such that the resistance to displacement of the input element 4 can be influenced.

[0082] Furthermore, a vibration unit 11 is visible for generating a haptically perceptible vibration of the input element 4. According to the invention, the vibration unit 11 comprises a vibration body 12 and a second coil 13 with a second coil axis 14, which second coil 13 is provided for generating a second magnetic field. The vibration body 12 is coupled to a magnet arrangement 15, which can be influenced by the second coil 13 or by the second magnetic field, so that the vibration body 12 can be set into vibration depending on the second magnetic field that can be generated.

[0083] As can also be seen from Fig. 1, the vibrating body 12 can be supported by means of two spring elements 18 arranged opposite one another with respect to the vibrating body 12.

[0084] Furthermore, independently of the embodiment shown, a detection means 34 mentioned at the outset can be provided, as roughly schematically indicated, which detects a relative position of the input element 4 and forwards it to the digital computer 2.

[0085] In Fig. 2, the input device according to Fig. 1 is shown in a sectional view according to the section plane II-II.

[0086] Fig. 2 shows the braking unit 6, which comprises a first coil 7 for generating a first magnetic field, with a first coil axis 8 or winding axis, and a coil core. Also visible are the first friction surface 9 and the second friction surface 10. The first magnetic field generated by the first coil 7 allows the contact force of the first friction surface 9 against the second friction surface 10 to be varied, thereby influencing the displacement resistance of the input element 4.

[0087] The vibration unit 11 comprises the vibration body 12, which is preferably coupled or attached to the input element 4, as well as the second coil 13 for generating a second magnetic field with the second coil axis 14 or winding axis. As can also be seen, the second coil 13 or the entire vibration unit 11 can be arranged on the input element 4.

[0088] Furthermore, the magnet arrangement 15 coupled to the vibrating body is shown, by means of which the vibrating body 12 can be set into vibration depending on the second magnetic field that can be generated, thereby causing the vibration of the input element 4. The vibrating body 12 can preferably have a vibration axis 17, wherein the vibrating body 12 is movably mounted along the vibration axis 7 (with respect to the vibration).

[0089] The spring elements 18 can extend in a direction perpendicular to the vibration axis 17, as can be seen in the sectional view. Furthermore, receiving elements 19 for supporting the vibration body 12 or for fastening the spring elements 18 can be arranged on the input element 4, in particular formed integrally therewith.

[0090] Furthermore, it can be provided that the displacement direction 5 of the input element 4 is linear, and that the vibration axis 17 and the displacement direction 5 are parallel to each other.

[0091] The magnet arrangement 15 can comprise at least one permanent magnet (which interacts with the second coil), preferably two permanent magnets 16. In principle, a plurality of, for example, more than two permanent magnets can also be provided, which form a magnetic field that can be influenced by the second coil. If a permanent magnet is provided, it is preferably arranged within the vibrating body, with the magnetic field of the permanent magnet extending across the second coil.

[0092] As can further be seen from the figures, at least the first coil 7 can comprise an outer shell which, as mentioned above, can be ferromagnetic.

[0093] A principle of operation of the invention is explained below with reference to Figs. 2 and 3.

[0094] The first coil 7 preferably acts as an electromagnet, when energized, a reluctance force FR can be generated in the area of ​​the friction surfaces or in components that interact with the friction surfaces.

[0095] By energizing the first coil 7, a magnetic force can be generated that acts on a ferromagnetic part, preferably a friction element; thereby increasing the force between the first friction surface 9 and the second friction surface 10, so that the displacement resistance of the input element 4 is influenced, or in this case, increased, for example, by means of a magnetic attraction force. In this regard, the first magnetic field lines 20 of the first coil 7 are indicated. The normal force increases proportionally to the current strength, which also increases the displacement resistance due to the increase in the friction force.

[0096] Preferably, it can be provided that the two friction partners, which have the first and second friction surfaces, slide along each other in the non-energized state (of the first coil) without any significant normal force.

[0097] By means of the current supply to the second coil 13, the second magnetic field of the second coil 13, indicated by the second magnetic field lines 21, acts on the magnetic field of the magnet arrangement 15, indicated by the third magnetic field lines 39. Based on the moving charge in the second coil 13, which is preferably designed as a flat air coil, the Lorentz force FL acts perpendicularly, as shown, preferably parallel to the vibration axis 17 with respect to the interaction of the magnetic field of the magnet arrangement 15 with the second magnetic field. This causes a displacement of the vibrating body 12 in accordance with the acting Lorentz force FL.

[0098] Furthermore, a possible current direction with respect to the moving charge in the second coil is indicated by dashed lines.

[0099] By changing the current direction of the moving charge in the second coil 13, the Lorentz force FL acts in the opposite direction, as also indicated by the dashed line, which also results in a displacement of the vibrating body 12 in the opposite direction. Based on this alternating effect, the vibrating body 12 can thus be set into vibration, preferably along the vibration axis 17, causing the input element 4 to vibrate.

[0100] Depending on the frequency of an induced alternating current in the second coil 13, the oscillation of the vibrating body 12 and the associated vibration of the input element 4 can be controlled, increased, or decreased. If the second coil 13 is energized more strongly, the (respective) Lorentz force FL increases, and thus also the amplitude of the vibration. The frequency of the alternating current correlates with the frequency of the oscillation (or vibration).

[0101] The vibrating body 12 is preferably blocked or inhibited from displacement or movement in directions other than those of the vibration. Such blocking can be achieved, for example, by designing the material and shape of the bearing elements of the vibrating body 12, e.g., according to the spiral shape of the spring elements 18, in particular flat springs, shown in Fig. 1. For example, these can have two spiral-shaped webs (as shown), by means of whose elastic deformation the vibrating body 12 is movably mounted relative to the input element 4.

[0102] At this point, it should be mentioned that the mounting of the vibrating body 12 is not limited to the spring elements shown, but that other mounting means known from the prior art can also be used, which enable such a movement to cause the vibration, preferably along the vibration axis 17, or can block it in other directions.

[0103] The spring elements, preferably in the form of flat springs (or leaf springs), can thus preferably support the vibrating body and simultaneously limit its deflection to one direction. The magnet arrangement for moving the vibrating body is preferably attached to the vibrating body, whereby the vibrating body can also at least partially encompass the magnet arrangement or consist of it.

[0104] Furthermore, it should be mentioned that with regard to the effect of the magnetic field on the vibrating body, the second coil and / or the magnet arrangement 15 can in principle also be arranged differently, so that, for example, the oscillation can also be generated by means of a reluctance force of the second magnetic field and by changing the current direction, or also by means of a reset by the spring element.

[0105] As can also be seen, the second coil 13 can preferably have a significantly lower overall height than the first coil 7, e.g., less than 25%, in particular 15%, of the height of the first coil. The diameters of the coils can be selected to be approximately the same size, with the second coil preferably having at least a slightly larger diameter than the first coil.

[0106] As can also be seen in Figs. 2 and 3, it can be provided that two permanent magnets 16 are arranged between the vibrating body 12 and the second coil 13 and are aligned opposite to each other with respect to their respective magnetic poles (N / S) in a direction along the second coil axis 14.

[0107] Alternatively, the magnet arrangement 15 may comprise two electromagnets.

[0108] As mentioned at the beginning, this allows the control to be made even more flexible, or a further influencing factor for generating the oscillation can be obtained. Furthermore, it can be provided that the first coil axis 8 and the second coil axis 14 are arranged parallel to each other; they can also be arranged concentrically to each other.

[0109] As can also be seen from the figures, the vibration axis 17 can be arranged perpendicular to the second coil axis 14.

[0110] With regard to the displacement, a guide element 22 of the input element 4 and a complementary guide receptacle 23 of the base 3 are also shown.

[0111] The input element according to Fig. 2 is in a first position with respect to its relative displacement, which can be, for example, an initial position, e.g. in the form of a non-actuated state of the input element 4.

[0112] In Fig. 3, the input element 4 is in a second position with respect to its relative displacement (relative to the base 3), which can preferably be an actuated position of the input element 4, e.g. an (at least partially) pressed state of a key.

[0113] In Fig. 3, a deformation of the bearing elements of the vibrating body 12 is also schematically indicated by dashed lines. When the vibrating body 12 moves along the vibration axis 17, the spring elements 18 deform (elastically) according to the respective oscillation movement, e.g., according to the illustration in the figure, to the left, as with the indicated deformed spring elements 18a, or to the right, depending on the direction of the moving charge in the second coil 13 and the resulting second magnetic field.

[0114] The illustrated vibrating body 12 is (firmly) connected to the spring elements 18 at its ends by means of screws in the area of ​​the vibration axis 17. It should be noted at this point that other fastening means or methods can also be provided for establishing a connection in this area, e.g., as mentioned above, pressed, caulked, or molded using a plastic—in which case, reference is generally made to the prior art. Furthermore, it can be provided that at least one of the coils 7, 13 is arranged on the base 3 and thus immovable with respect to the relative displacement of the input element 4.

[0115] In this regard, Fig. 4 shows a possible embodiment of the input device 1, in which the first coil 7 is arranged on the base 3.

[0116] Furthermore, the coil 7 may further comprise the first friction surface 9, which is coupled to the base 3, as also indicated. The second friction surface 10, which is coupled to the input element 4, may preferably be formed on a friction element arranged on the input element 4.

[0117] In addition, another possible configuration is indicated by dashed lines in Fig. 4, according to which the second coil 13a can also be arranged on the base 3a. The magnet arrangement 15a can also be arranged on the opposite side, so that it is arranged between the vibrating body 12 and the coil 13a, as also indicated by dashed lines. Furthermore, a (preferably ferromagnetic) second coil body 35, or also a coil core, is indicated, which can be provided in a separate arrangement of the second coil.

[0118] Furthermore, in Fig. 4, regardless of the embodiment shown, a possible preload is indicated, which can be provided with respect to the distance 25 between the first and second friction surfaces 9, 10.

[0119] The preload can be provided to distance the friction surfaces 9, 10 from one another, for example, by providing one or more preload elements 24, preferably compression springs, as indicated, which hold the second friction surface 10 or (if appropriate also the input element 4) from the first friction surface 9 at a distance 25, so that when the first coil 7 is not energized, the friction surfaces 9, 10 do not touch. Only when energized, and when the attractive force acts, are the friction surfaces pressed against one another, thereby adjusting the displacement resistance.

[0120] Alternatively, it can also be provided that the friction surfaces are pressed against one another by means of pre-tensioning elements, so that a maximum displacement resistance is generated by means of the pre-tensioning elements, wherein when the first coil 7 is energized, the friction surfaces are moved away from one another in the opposite direction, so that the displacement resistance is reduced when the current is applied.

[0121] With regard to the arrangement of preload elements, it should also be mentioned that these can preferably be mounted in a sliding manner with respect to the displacement movement of the input element, so that they maintain a relative position.

[0122] Fig. 5 shows a possible embodiment in which the first coil 7 and the second coil 13 are arranged on the base 3.

[0123] As shown, the first and second coils 7, 13 can be arranged directly adjacent and surrounded by the input element 4. Alternatively, at least one of the coils 7, 13 or both could be arranged externally with respect to the arrangement, so that the input element 4 is guided between the coils 7, 13.

[0124] Furthermore, in Fig. 5, regardless of the embodiment, a coating 27 is indicated by dashed lines, which, as mentioned above, can be provided to increase the coefficient of friction and / or to protect the friction element(s) from corrosion. For example, the coating 27 can form the first friction surface 9 on the base 3 or, as shown, on the coil body of the first coil 7, and / or can also be provided on the input element 4, e.g., on the friction element 26, as indicated by the coating 33. Furthermore, the respective coating can be ferromagnetic; such a coating can be referred to as a friction lining.

[0125] According to another possible embodiment, also independent of the illustrated embodiment, it can also be an input element 4 that is pivotable with respect to the displacement direction 5 and can be pivoted about an axis, e.g., preferably about at least one of the coil axes 7, 13, as indicated by the displacement direction 5a, which is preferably a direction of rotation (e.g., about the second coil axis 14). In principle, a combination of the directions is also conceivable.

[0126] As shown in Fig. 6, the vibrating body 12, in particular the vibration axis 17, can be inclined at a first angle 28 relative to a normal (relative to a surface of the second coil) (optionally also relative to the displacement direction 5). The bearing elements of the vibrating body 12 can preferably also be arranged at an angle, as can be seen from the obliquely arranged spring elements 18, which are thus arranged perpendicular to the vibration axis 17.

[0127] The vibrating body 12 is preferably inclined (or wedge-shaped) at least on its first surface 29 facing the magnet arrangement 15, so that the respective magnets of the magnet arrangement 15 have the same gap distance 30 from the second coil 13. Accordingly, the first surface 29 can also be arranged at an angle corresponding to the first angle 28 relative to the vibration axis 17. As further indicated by dashed lines, the second surface 32 of the vibrating body 12, arranged opposite the first surface, can also be inclined relative to the angle 28 to the normal.

[0128] In this regard, the vibration axis 17 can also be inclined relative to the second coil axis 14 by the amount of the first angle 28, e.g. perpendicular or 90° +(-) the angle relative to the second coil axis 14, as indicated by the second angle 31.

[0129] In Fig. 7, a further possible embodiment of the brake unit 6 is illustrated, independent of the possible arrangement of the second coil, in which the first and second friction surfaces 9, 10 are prestressed against each other, preferably by means of prestressing elements 24, wherein the friction surfaces are distanced from each other by means of the energization of the first coil 7.

[0130] Furthermore, a possible movable mounting of the first coil 7, or of a body of the base 3 which has the first friction surface 9, is shown by means of the prestressing elements 24a indicated by dashed lines. For example, it can be provided that the first coil 7 is not movable with respect to the displacement of the input element 4, but is nevertheless movably mounted relative to the base 3. It should be noted in general that the illustrated arrangement of the prestressing elements 24, 24a in Fig. 7 (or also in Fig. 5) serves only to schematically illustrate their operating principle and is not limited to the local arrangement.

[0131] For completeness, it should be mentioned that such a movable bearing can also be provided in a design in which the friction surfaces are attracted by energizing the coil. Furthermore, the possible coatings 27, 33, preferably for forming the friction surfaces, are indicated independently of this, as is a possible direction of displacement 5a (or direction of rotation) around a rotational axis.

[0132] Figures 4 to 7 show further and possibly independent embodiments of the input device, wherein the same reference numerals or component designations are used for the same parts as in the preceding figures 1 to 3. To avoid unnecessary repetition, reference is made to the detailed description in the preceding figures.

[0133] Fig. 8 shows a further possible embodiment of the spring elements 18 (in the form of a flat spring), in which the spring element 18 has a round or circular geometry, wherein the outer geometry can basically also be rectangular with respect to the illustrated frame, which is connected to the input element, or can have other geometries. By means of the illustrated spring element 18, a further preferred embodiment of the spring geometry is illustrated with respect to its already mentioned degrees of freedom. As mentioned at the beginning, the spring element can preferably only enable a displacement or movement of the vibrating body along one direction of movement and block it in other directions, so that the oscillation of the vibrating body is oriented in a desired direction relative to the input element. As can also be seen, the spring element 18 can have three spiral-shaped webs which are elastically deformable.In this regard, the spring element 18 also has three bearing areas 37 with respect to the elastically deformable webs, so that the fastening points of the movable parts of the spring element are increased in the circumferential direction, whereby the stability against a displacement of the vibrating body (or the webs) transverse to the deformation direction is increased.

[0134] Furthermore, with regard to the elastic deformation, the vibration axis 17 of the vibration body (not shown) is indicated, which correlates with the deformation direction of the spring element.

[0135] The spring elements in the form of flat springs can (regardless of the embodiment shown) generally be molded into the input element or formed from the material of the input element with regard to their attachment. They can also be integrally bonded to the vibrating body. Furthermore, as an alternative to the spring elements shown in Figures 1-8, other spring elements can also be provided, e.g., conventional coil springs or an arrangement of several spring elements, which together form a respective bearing for the vibrating body.

[0136] Furthermore, Fig. 9 shows a parallel arrangement of the vibration axis 17 to the second coil axis 14, wherein the vibration body 12 is movably mounted along the vibration axis 17.

[0137] In the arrangement according to Fig. 9, the magnet arrangement 15 can, for example, comprise only one permanent magnet, which can be attracted (or repelled) when the second coil 13 is energized.

[0138] As further shown in Fig. 9, the second coil 13 can also have a greater overall height, so that it cannot be designed as a flat coil. Furthermore, it preferably has a (ferromagnetic) coil core.

[0139] Furthermore, it is also conceivable (regardless of the embodiment shown) to provide only one spring element 18, in particular a flat spring, with regard to the movement and mounting of the vibrating body 12, which is preferably coupled to the vibrating body in the region of a center of gravity (not shown).

[0140] Furthermore, in an embodiment not shown, two second coils can also be provided opposite one another, which are provided at a respective end (with respect to the vibration axis), wherein the magnet arrangement can also comprise a second permanent magnet in this regard, so that a permanent magnet is assigned to a respective second coil.

[0141] In principle, the different arrangements of the vibrating bodies and the vibration axes indicate the associated possible variable configurations of the vibration unit, so that they can be optimally adapted to different input elements and predetermined displacement directions, with the vibration direction preferably being oriented according to the displacement directions (same or opposite). Figure 10 shows another possible embodiment of an input device 1, in which the vibrating body 12 moves with respect to its oscillation around the vibration axis 17.

[0142] As shown, spring elements can be provided, for example, with respect to the oscillation around the vibration axis, each of which acts against a rotation of the vibrating body (around the vibration axis 17). The spring elements can be designed, for example, in the form of at least one rotational spring 38 or torsion springs. Preferably, the spring elements can in turn be rigidly attached to the input element 4 with respect to their attachment at a first end (along the vibration axis), and optionally a second rotational spring 38 can be rigidly connected to the vibrating body 12 at a second end.

[0143] Furthermore, the displacement direction 5 of the input element 4 can be a rotational direction, which can preferably be arranged parallel to the vibration axis 17.

[0144] Furthermore, the vibration axis 17 can be arranged parallel to the second coil axis 14.

[0145] As further shown in Fig. 10, it can be provided that the first coil axis 8, the second coil axis 14, the vibration axis 17 and the displacement direction 5 are arranged parallel to one another, in particular concentric to one another.

[0146] Furthermore, in an embodiment not shown, it can be provided that the reluctance force of the second coil 13 is also used to generate the vibration, for example if, in an arrangement according to Fig. 10, the vibration unit 11 has a flat spring instead of the rotation spring 38 shown, so that the vibration mass moves along the vibration axis 17.

[0147] Fig. 11 schematically shows an arrangement of a transmission arrangement 36, which can be designed, for example, in the form of a joint arrangement. The transmission arrangement 36 serves to transmit a movement on the input element 4 in a predefined displacement direction 5 of the input element in the region of the base 3, e.g., linearly. By means of such an arrangement, an input device 1 according to the invention can be adapted to different requirements using simple means, so that, for example, it can always be designed the same with regard to its displacement direction 5 within the input device and yet can still be used in different areas of application.

[0148] The embodiments show possible embodiments, whereby it should be noted at this point that the invention is not limited to the specifically illustrated embodiments thereof, but rather various combinations of the individual embodiments with each other are also possible and this possibility of variation lies within the skill of the person skilled in the art in this technical field due to the teaching of technical action by means of the objective invention.

[0149] The scope of protection is determined by the claims. However, the description and drawings must be used to interpret the claims. Individual features or combinations of features from the various embodiments shown and described may represent independent inventive solutions. The problem underlying these independent inventive solutions can be derived from the description.

[0150] All information on value ranges in this description is to be understood as including any and all sub-ranges thereof, e.g. the information 1 to 10 is to be understood as including all sub-ranges starting from the lower limit of 1 and the upper limit of 10, ie all sub-ranges begin with a lower limit of 1 or greater and end with an upper limit of 10 or less, e.g. 1 to 1.7, or 3.2 to 8.1, or 5.5 to 10.

[0151] For the sake of clarity, it should be noted that some elements have been shown not to scale and / or enlarged and / or reduced in size to better understand the structure. Reference symbols

[0152] Input device 32 second surface

[0153] Digital computer 33 coating

[0154] Base 34 recording means

[0155] Input element 35 second coil body

[0156] Displacement direction 36 transmission arrangement

[0157] Brake unit 37 Bearing area first coil 38 Rotation spring first coil axis 39 third magnetic field lines first friction surface FR Reluctance force second friction surface FL Lorentz force

[0158] Vibration unit

[0159] Vibration body second coil second coil axis

[0160] Magnet arrangement

[0161] Permanent magnets

[0162] Vibration axis

[0163] Spring elements

[0164] Recording elements first magnetic field lines second magnetic field lines

[0165] Guide element

[0166] Guided tour

[0167] Pre-tensioning element

[0168] Distance

[0169] Friction element

[0170] Coating first angle first surface

[0171] Gap distance second angle

Claims

Patent claims 1. Input device (1) for inputting control commands into a digital computer (2), the input device (1) comprising: - a base (3); - an input element (4) which is mounted on the base (3) so as to be displaceable thereon; - a braking unit (6) for influencing a displacement resistance of the input element (4) to the base (3), comprising; - a first coil (7) for generating a first magnetic field, with a first coil axis (8); and a coil core; and - a first friction surface (9) coupled to the base (3); - a second friction surface (10) which is coupled to the input element (4), wherein by means of the first magnetic field generated by the first coil (7) a contact force of the first friction surface (9) against the second friction surface (10) can be changed, so that the displacement resistance of the input element (4) can be influenced; - a vibration unit (11) for generating a vibration of the input element (4); characterized in that the vibration unit (11) comprises a vibration body (12) and a second coil (13) for generating a second magnetic field with a second coil axis (14), wherein the vibration body (12) is coupled to a magnet arrangement (15) such that the vibration body (12) can be set into vibration by means of the second magnetic field.

2. Input device (1) according to claim 1, characterized in that the magnet arrangement (15) comprises at least one permanent magnet (16).

3. Input device (1) according to claim 2, characterized in that at least two permanent magnets (16) are arranged between the vibrating body (12) and the second coil (13) and are aligned opposite to each other with respect to their respective magnetic poles in a direction along the second coil axis (14).

4. Input device (1) according to one of claims 1 to 3, characterized in that the first coil axis (8) and the second coil axis (14) are arranged parallel to one another.

5. Input device (1) according to one of claims 1 to 4, characterized in that the vibrating body (12) is mounted so as to be movable relative to a vibration axis (17) with respect to the vibration.

6. Input device (1) according to claim 5, characterized in that a displacement direction (5) of the input element (4) is linear, and that the vibration axis (17) and the displacement direction (5) are parallel to each other.

7. Input device (1) according to claim 5 or 6, characterized in that the vibration axis (17) is arranged perpendicular to the second coil axis (14).

8. Input device (1) according to claim 5 or 6, characterized in that the vibration axis (17) is arranged parallel to the second coil axis (14).

9. Input device (1) according to one of claims 1 to 7, characterized in that the vibrating body (12) is mounted by means of two spring elements (18) arranged opposite one another with respect to the vibrating body (12).

10. Input device (1) according to claim 9, characterized in that the spring elements (18) extend in a direction perpendicular to the vibration axis (17).

11. Input device (1) according to one of claims 1 to 10, characterized in that the second coil (13) is arranged on the base (3).

12. Input device (1) according to one of claims 1 to 10, characterized in that the second coil (13) is arranged on the input element (4) and is displaceable therewith relative to the base (3).

13. Input device (1) according to one of claims 1 to 12, characterized in that the first coil (7) is arranged on the input element (4) and is displaceable therewith relative to the base (3).

14. Input device (1) according to one of claims 1 to 12, characterized in that the first coil (7) is arranged on the base (3).

15. Input device (1) according to one of claims 1 to 14, characterized in that the first friction surface (9) or the second friction surface (10) is formed on the coil core of the first coil (7).

16. Input device (1) according to one of claims 1 to 15, characterized in that the second coil (13) can be energized by means of alternating current, wherein the oscillation of the vibrating body (12) is dependent on a frequency and current intensity of the alternating current.

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