Input device for entering control commands into a digital computer, and method for operating an input device

Description

[0001] The invention relates to an input device for inputting control commands into a digital computer, and to a method for operating an input device.

[0002] US11048344B1 discloses in Fig. 10 a key which is received in a key housing, a return spring for the key, a permanent magnet, an electrical winding, and a magnetorheological fluid which is arranged between the key and the key housing and is delimited by two O-rings. The properties of the magnetorheological fluid can be influenced by means of the electrical winding, thereby influencing the resistance during the movement of the key.

[0003] The design disclosed in US11048344B1 has the disadvantage that the magnetorheological fluid can escape from its intended position over time. Furthermore, the O-rings of the known button are subject to wear and tear or can become brittle. The design disclosed in US11048344B1 therefore has an insufficient service life.

[0004] The object of the present invention was to overcome the disadvantages of the prior art and to provide a device and a method which has an improved service life.

[0005] This problem is solved by a device and a method according to the claims.

[0006] According to the invention, an input device is designed for inputting control commands into a digital computer. The input device comprises: a base; an input element which is slidably mounted on the base in a sliding direction, wherein the input element has an actuating surface for actuation by a user; a braking device for influencing a sliding resistance of the input element to the base, characterized by the fact that The braking device comprises the following elements: a coil for generating a magnetic field, wherein the coil is wound around a winding axis; a coil core; a first friction surface coupled to the base; a second friction surface coupled to the input element, wherein a contact force of the first friction surface against the second friction surface can be changed by means of the magnetic field generated by the coil, thereby influencing the displacement resistance of the input element.

[0007] The input device according to the invention has the advantage of being robust yet space-saving. This makes it easy to integrate the input device into an electronic component, such as a keyboard or other input device arrangement. Furthermore, the braking device according to the invention allows the sliding resistance of the input element to be easily and effectively controlled, thereby achieving precise haptic feedback at the input element. The design of the input device according to the invention also allows the haptic feedback, in the form of a changed sliding resistance, to be precisely adjusted to achieve an improved user experience.In summary, the input device according to the invention thus has the advantage that, surprisingly, a combination of improved robustness and improved haptic feedback at the input element can be achieved.

[0008] In particular, it can be specified that the displacement of the input element relative to the base is a linear displacement. The direction of displacement can therefore be a straight line.

[0009] Furthermore, the input device may include a detection means for recording a displacement of the input element. The detection means may also be installed outside the input device, and the displacement of the input element may be recorded by external sensors, for example, optical sensors.

[0010] The detection device can be configured to detect the incremental or absolute position of the input element relative to the base. Alternatively, the detection device can be configured to detect end positions and / or intermediate positions of the input element relative to the base.

[0011] Furthermore, it may be provided that the input device, in particular the detection means and the coil, are coupled to a printed circuit board. The printed circuit board may include electronic components arranged on it. In particular, it may be provided that the printed circuit board includes a microcontroller. Furthermore, it may be provided that the printed circuit board, in particular the microcontroller, can be coupled to the digital computer. In particular, it may be provided that the signal from the input device is converted into a digital signal for transmission to the digital computer by means of the printed circuit board. Furthermore, it may be provided that a digital control command from the digital computer for energizing the coil is converted into an actual energizing of the coil by means of the printed circuit board. In particular, it may be provided that a transistor is arranged on the printed circuit board, which is configured to switch the energizing of the coil.

[0012] One way to establish a data connection between a circuit board, such as those found in a keyboard or joystick, and a digital computer is via a wired interface. This interface can be implemented using standardized cables, ensuring reliable and fast data transmission. Direct contact between the circuit board and the digital computer allows for data transfer with minimal latency and maximum accuracy. Furthermore, the cable can transmit the necessary electrical power to energize the coil.

[0013] Another option for data transmission between a circuit board in a keyboard and a digital computer is wireless technology. This utilizes wireless communication protocols such as Bluetooth or Wi-Fi, enabling a flexible and convenient connection without the need for physical cables. This wireless connection offers the advantage of mobility, as the keyboard or joystick can be moved freely without being tethered to a cable. It allows for seamless data transmission over short to medium distances. The development of efficient power management systems, combined with modern battery technologies, ensures sufficient operating time even when the coil requires power.

[0014] The displacement resistance of the input element can be influenced by varying the current applied to the coil. This can be achieved by varying the current applied to the coil, which in turn affects the generated magnetic field.

[0015] Furthermore, it can be advantageous for the input element to comprise a button, wherein the actuation surface is arranged on a top surface of the button, and the second friction surface extends at a right angle to the top surface of the button. Particularly with buttons, the design according to the invention can achieve an improved actuation experience.

[0016] Furthermore, the input element can be provided to include a key carrier, with the key being arranged on the key carrier. By providing a separate key carrier, differently designed keys can be accommodated on the key carrier. Thus, it is easily possible to replace conventional key carriers without a braking device or key carriers with a differently designed braking device with the key carriers according to the invention.

[0017] Furthermore, the second friction surface can be arranged on a friction element made of a ferromagnetic material, while the first friction surface is formed on the coil core. This offers the advantage that the friction element can serve to guide the magnetic field, or that the magnetic field lines can pass through the friction element, whereby the air gap between the friction element and the coil core can be zero due to the contact between the first and second friction surfaces. In other words, the friction element can be designed as a yoke that closes the magnetic circuit or the magnetic flux.

[0018] In an alternative embodiment, a movable yoke is coupled to the input element. When the coil is energized, the movable yoke can be attracted to the coil core by the generated magnetic field. The second friction surface, which can be located on the input element, and the first friction surface, which can be located at the base, can be situated outside the generated magnetic field. Plastic components can be used for the first and second friction surfaces, respectively, thereby modifying or improving their friction properties. This allows for influencing the sliding resistance.

[0019] By structurally designing the first friction surface and the second friction surface independently, or by arranging these two friction surfaces on different components, a magnetic attraction or a magnetic repulsion between the first friction surface and the second friction surface can be achieved.

[0020] Furthermore, the friction element may be provided with a friction element coating in the area of ​​the first friction surface, which serves to increase the coefficient of friction and / or to protect the friction element from corrosion, in particular that the first friction surface is arranged on the friction element coating, and in particular that the friction element coating is ferromagnetic. This has the advantage of improving functionality. In particular, this measure prevents the first friction surface from seizing onto the second friction surface, thus ensuring good functional retention of the input device over its service life. Furthermore, this measure can harden the surface, thereby reducing wear. A ferromagnetic coating can also improve the propagation of the magnetic field lines.

[0021] Furthermore, the coil core may be provided with a coating that increases the coefficient of friction and / or protects the iron core from corrosion, in particular that the second friction surface is located on the coil core coating, and especially that the coil core coating is ferromagnetic. This offers the advantage of improved functionality. Specifically, this measure prevents the first friction surface from seizing onto the second, thus ensuring good functional integrity of the friction damper over its service life. Furthermore, this measure hardens the surface, reducing wear. A ferromagnetic coating also improves the propagation of the magnetic field lines.

[0022] Furthermore, the friction element can be rigidly mounted to the key or key carrier. This offers the advantage that the friction element can be easily embedded in the key or key carrier. For example, it is conceivable that the friction element could be injection-molded or cast into the key or key carrier.

[0023] Another advantageous design allows the coil core to be slidably mounted at the base along the axial direction of a winding axis. This allows the coil core to be attracted to the friction element when the electromagnet is energized, thus influencing the friction.

[0024] In an alternative design variant, it is also conceivable that the coil core is pressed against the friction element by a spring element and that when the coil is energized, the pressing force of the coil core against the friction element is reduced, thereby reducing friction.

[0025] In particular, it may be provided that the base has a coil receptacle in which the coil together with the coil core is slidably mounted in the axial direction of the winding axis.

[0026] In an alternative embodiment, the friction element can be mounted on the key or key carrier in a way that allows it to be displaceable in one direction of movement relative to the key or key carrier, with the direction of movement being at a right angle to the second friction surface. In such an embodiment, the friction element, in particular the second friction surface which may be arranged on the friction element, can be attracted to or repelled from the first friction surface, thereby changing the contact force of the first friction surface against the second friction surface and thus influencing the displacement resistance of the input element.

[0027] Furthermore, it can be advantageous to have a recess in the key or key housing for the positively sliding insertion of the friction element. This has the advantage that the friction element can be easily inserted into the key or key housing.

[0028] Furthermore, the first friction surface can be formed on the coil core, and the friction element and the coil core can be positioned relative to each other such that, when the coil is energized, the friction element is pressed against the coil core, with the magnetic field passing through the coil core and the friction element. This has the advantage that solid friction can be generated between the friction element and the coil core. This allows for a simple design of the input device. Moreover, an input device with this configuration can exhibit high efficiency.

[0029] Furthermore, it can be advantageous to have a third friction surface coupled to the base and a fourth friction surface coupled to the input element, whereby the contact force of the third friction surface against the fourth friction surface can be varied by means of the magnetic field generated by the coil, and the second and fourth friction surfaces are symmetrical about a plane of symmetry of the input element. This has the advantage that a symmetrical force can be applied to the input element, thereby preventing a tilting moment on the input element caused by the resulting normal forces or frictional forces. This helps to avoid tilting of the input element and the resulting jamming.Overall, this measure can improve the functionality of the input device and, furthermore, enhance the user experience when operating the input device.

[0030] Furthermore, a return spring can be provided to return the input element to its initial position, wherein the coil core has a central recess in the area of ​​the winding axis, and the return spring is received in the central recess. This has the advantage that a simple, symmetrical return of the input element can be achieved, thus preventing the input element from jamming.

[0031] Furthermore, it can be provided that the first friction surface and / or the second friction surface are located outside the effective range of the generated magnetic field. This has the advantage that the bodies on which the first friction surface and / or the second friction surface are located do not necessarily have to be ferromagnetic. Thus, the first friction surface and / or the second friction surface can, for example, be made of a plastic material with good sliding properties. This offers the surprising advantage that the haptic behavior of the input device can be improved. "Outside the effective range of the generated magnetic field" in this context does not mean that the magnetic field does not reach the first friction surface and / or the second friction surface, but rather that the field lines of the magnetic field are not focused over the first friction surface and / or the second friction surface.

[0032] In particular, the return spring can be made of a non-ferromagnetic material. This has the advantage that the coil, or the magnetic field generated when the coil is energized, has no influence on the properties or the effect of the return spring.

[0033] Furthermore, the coil core can be designed to be divided into a first coil core section and a second coil core section along the winding axis. This offers the advantage that the coil core sections can have a complex geometry, and a finished coil can still be assembled with the coil core sections or inserted between them.

[0034] In particular, it may be provided that the first coil core part is designed as a deep-drawn part.

[0035] Furthermore, it may be provided that the second coil core part is designed as a deep-drawn part.

[0036] In particular, it may be provided that the first coil core part has a first cylinder section and a first flange section.

[0037] Furthermore, it may be provided that the second coil core part has a second cylinder section and a second flange section.

[0038] According to the invention, a keyboard with several input devices for entering control commands into a digital computer is provided. At least one of the input devices is designed according to one of the above characteristics.

[0039] The input device according to the invention is particularly suitable for improving the keyboard in terms of its technical design or for improving the user experience when operating the keyboard, especially in a keyboard.

[0040] According to the invention, a vehicle or work machine can also be provided with at least one input device for inputting control commands into a digital computer. Here, too, the input device is designed according to one of the above characteristics.

[0041] In a vehicle or work machine, the input device according to the invention offers the advantage that the usability of the vehicle or work machine can be improved by the features of the invention. Thus, not only can an improved user experience be achieved, but also safety in connection with the operation of the vehicle or work machine can be improved.

[0042] According to the invention, a method for operating an input device is provided. The input device is coupled to a digital computer and serves to input control commands into the digital computer. The method comprises the following steps: Detecting the position of the input element using a detection device; energizing the coil and thus generating a magnetic field, if specified by the digital computer, thereby changing the contact force of the first friction surface against the second friction surface, which influences the displacement resistance of the input element.

[0043] The method according to the invention has the advantage that the method features enable an improved user experience when using the input device.

[0044] Furthermore, it can be advantageous to increase the contact force of the first friction surface against the second friction surface when the coil is energized, thereby increasing the displacement resistance of the input element. This has the advantage that the displacement resistance of the input element can be low when the coil is not energized. Thus, energizing the coil is only necessary when the displacement resistance of the input element needs to be increased. This results in a particularly energy-efficient operating mode.

[0045] In an alternative embodiment, the contact force of the first friction surface against the second friction surface can be reduced when the coil is energized, thus decreasing the sliding resistance of the input element. This is particularly advantageous when a high sliding resistance is desired by default and only needs to be reduced in specific exceptional cases. When the coil is energized, the generated magnetic field can repel the first and second friction surfaces from each other. Specifically, the first and second friction surfaces can be pre-tensioned against each other by means of a spring element and pressed together.

[0046] Furthermore, it can be provided that the coil is energized by the digital computer when the input element is moved to a specific position by a user, a movement detected by the sensor. This offers the advantage that the input element can have a first displacement resistance within a certain displacement range and a second displacement resistance within a further displacement range, which differs from the first. The distribution of these displacement ranges, or the position of the input element at which the coil is energized, can be individually defined as required.

[0047] Furthermore, the braking device can be designed so that, above a certain current threshold of the coil within the operating range, the braking effect is greater than the restoring force of the return spring. This has the advantage that the input element can be held in any position from its rest position to its actuated position. Thus, the input element can remain in an actuated position.

[0048] A copper alloy can be used as the material for the coil.

[0049] A ferromagnetic material can be used as the material for the coil core. This could, for example, be an iron alloy.

[0050] A ferromagnetic material can be used for the outer shell. This could, for example, be an iron alloy.

[0051] A ferromagnetic material can be used as the material for the friction element. This could, for example, be an iron alloy. Furthermore, the friction element can also be composed of several parts, in which case different materials can be used for the individual parts. In particular, a part made of an iron alloy can be embedded in a part made of a plastic alloy.

[0052] A ferromagnetic material can be used as the material for the hollow cylinder body. This could, for example, be an iron alloy.

[0053] A plastic material can be used for the base.

[0054] The input element can be made of plastic. In particular, the key carrier can be made of a plastic material. Furthermore, the key itself can also be made of a plastic material.

[0055] To better understand the invention, it is explained in more detail with reference to the following figures.

[0056] They each show, in a highly simplified, schematic representation: Fig. 1 shows a sectional view of a first embodiment of an input device along section line II. Fig. 3 in a rest position; Fig. 2 a sectional view of the first embodiment of the input device according to section line II from Fig. 3 in an actuation position; Fig. 3 a sectional view of the first embodiment of the input device along section line III-III from Fig. 1in an actuation position; Fig. 4 a sectional view of a second embodiment of an input device in a rest position; Fig. 5 a sectional view of a third embodiment of an input device in a rest position; Fig. 6 a sectional view of the third embodiment of the input device in an actuation position; Fig. 7 a perspective view of a key of the third embodiment of the input device; Fig. 8 a schematic representation of components of a fourth embodiment of the input device; Fig. 9 a top view of a keyboard with several input devices.

[0057] It should be noted at the outset that in the differently described embodiments, identical parts are provided with the same reference numerals or component designations, and the disclosures contained in the entire description can be applied analogously to identical parts with the same reference numerals or component designations. Furthermore, the positional designations chosen in the description, such as top, bottom, side, etc., refer to the figure directly described and illustrated, and these positional designations must be applied analogously to the new position if the position changes.

[0058] Fig. 1 Figure 1 shows a sectional view of a first embodiment of an input device 1 for inputting control commands into a digital computer 2. The section line used here is section line II from Figure 2. Fig. 3 elected. In the Figure 2The first embodiment of the input device 1 is shown in a further position, but in the same sectional view as in Fig. 1 depicted. In the Figure 3 The first embodiment of the input device 1 is shown in a further sectional view.

[0059] The further description of the first embodiment of the input device 1 is given by means of a summary of the Figures 1 to 3 .

[0060] In particular, the input device 1 may be coupled to the digital computer 2 via a means of data communication. Furthermore, the input device 1 may include a power supply by means of which it is powered.

[0061] As from Fig. 1As can be seen, the input device 1 may comprise a base 3 on which an input element 4 may be received. In particular, it may be provided that the input element 4 is coupled to the base 3 so as to be displaceable relative to the base 3 in a displacement direction 5. It may be provided that a guide receptacle 6 is formed in the base 3 and that the input element 4 is shaped to be complementary to the guide receptacle 6, such that the input element 4 is displaceably received in the guide receptacle 6. In particular, a sliding guide between the input element 4 and the base 3 may be implemented.

[0062] In particular, the input element 4 may be provided with an actuation surface 7. The actuation surface 7 may be freely accessible, allowing a user, for example, to touch it with their finger. The user can thus exert pressure on the actuation surface 7 and move the input element 4 in the displacement direction 5 relative to the base 3.

[0063] As from Fig. 1Furthermore, it can be provided that the input element 4 comprises a button 8, on which the actuating surface 7 can be arranged. In particular, it can be provided that the actuating surface 7 is arranged on a cover surface 9 of the button 8. Furthermore, it can be provided that the input element 4 comprises a button carrier 10, which can be slidably received in the guide receptacle 6. In particular, it can be provided that the button 8 is received on the button carrier 10. In particular, it can be provided that the button 8 is attached to the button carrier 10 by means of a positive and friction-fit connection.

[0064] Furthermore, it may be provided that a return spring 11 is formed, which is used to return the input element 4 from an actuation position 12, as described in Fig. 2 is shown, in a rest position 13, as shown in Fig. 1 As depicted, it serves its purpose.

[0065] Furthermore, it can also be provided that several return springs 11 are formed. In particular, it can be provided that several return springs 11 are arranged evenly distributed in the input device 1, so that the forces of the return spring 11 do not cause the input element 4 to tilt. In particular, it can be provided that the return spring 11 acts between the base 3 and the input element 4. As can be seen from the Fig. 1 and 2 It can be seen that the return spring 11 may act between the base 3 and the key carrier 10.

[0066] In particular, it can be provided that the key carrier 10 is received in the base 3 in such a form-fitting manner that it is forced into the rest position 13 by the return spring 11, forming a stop.

[0067] As from the Fig. 1 and 2It can also be seen that a braking device 14 is provided which serves to influence the displacement resistance of the input element 4 to the base 3.

[0068] In particular, the braking device 14 may include a coil 15 wound around a winding axis 16. In particular, the coil 15 may be arranged in the braking device 14 such that the winding axis 16 is at a right angle to the first friction surface 19.

[0069] In particular, it may be provided that the coil 15 is mounted on a coil core 17. Furthermore, it may be provided that an outer casing 18 is formed, which surrounds the coil 15 or the coil core 17. It may also be provided that a first friction surface 19 is formed on the coil core 17 or the outer casing 18, and that a second friction surface 20 is formed on the input element 4, which interacts with the first friction surface 19. In particular, it may be provided that a corresponding frictional force can be achieved by the first friction surface 19 bearing against the second friction surface 20 and the application of a normal force.

[0070] In particular, it may be provided that the second friction surface 20 is arranged on a friction element 21. The input element 4 may comprise the friction element 21. In particular, it may be provided that the friction element 21 is received in the key carrier 10. The friction element 21 may be injection-molded into the key carrier 10. In particular, it may be provided that the key carrier 10 is formed as an injection-molded part made of a plastic material.

[0071] Preferably, a friction element carrier 22 is formed on the key carrier 10. The friction element 21 can be received in the friction element carrier 22. In particular, it can be provided that, as shown in Fig. 1 It can be seen that the friction element carrier 22 is formed in the form of a bridge on the key carrier 10.

[0072] In the present embodiment of the input device 1 as described in the Fig. 1 and 2As shown, the coil core 17, together with the coil 15 and the outer casing 18, can be designed to be displaceable in the axial direction 23 of the winding axis 16 relative to the base 3. This allows the first friction surface 19 to be displaced relative to the second friction surface 20 in the normal direction of the friction surfaces, thereby varying the normal force between the two friction surfaces 19, 20 and thus influencing the frictional force or the displacement resistance of the input element.

[0073] In particular, it can be provided that a coil receptacle 24 is formed at the base 3, in which the outer casing 18 or the coil core 17 and the coil 15 are received. As shown from Fig. 1It can be seen that the spool holder 24 may have a recess 25 in which the outer casing 18 is received. A clearance fit may be formed between the recess 25 of the spool holder 24 and the outer casing 18, so that the outer casing 18 is slidably received relative to the recess 25.

[0074] In another embodiment, not shown separately, the outer casing 18 or the coil core 17 can be rigidly mounted in the base 3, and the two friction surfaces 19, 20 can be adjusted relative to each other by a corresponding displacement of the friction element 21. This can be achieved, for example, by mounting the friction element 21 so that it is displaceable in a direction of movement 26 relative to the key carrier 10. In a further embodiment, the displacement of the friction element 21 in the direction of movement 26 can also be achieved by making the friction element carrier 22 flexible and utilizing its spring-like properties to allow the movement of the friction element 21.

[0075] Based on a summary of Fig. 1 and 2The functionality of the first embodiment of the input device will now be explained.

[0076] In the presentation of the Fig. 1 The input element 4 is in its rest position 13. In this position, it can be held by the spring force of the return spring 11. By pressing the actuating surface 7 of the button 8, the user can push the input element 4 against the spring force of the return spring 11 towards its actuating position 12. This movement or position of the input element 4 can be detected by means of a sensing device 27.

[0077] The first friction surface 19 and the second friction surface 20 can slide against each other, with the normal force between the two friction surfaces 19, 20 being very small or zero. When the input element 4 reaches a certain position, the coil 15 can be energized. This allows a magnetic field to be generated. The magnetic field is represented by field lines 28, which are arranged around the coil 15. The field lines 28 pass through the coil core 17, the outer casing 18, and the friction element 21.

[0078] The magnetic field increases the normal force between the first friction surfaces 19 and the second friction surface 20, or presses them together. This increases the frictional force, which in turn increases the sliding resistance of the input element. In particular, the current intensity can be varied, which also varies the sliding resistance of the input element. Depending on the predefined current modes, a wide variety of haptic feedback can be provided to the user. If the user reduces their pressure on the actuating surface 7 and, at the same time, the frictional force of the two friction surfaces 19, 20 (corresponding to the current applied to the coil 15) is less than the spring force of the return spring 11, the return spring 11, following the movement of the user's finger, pushes the input element 4 into the rest position 13.

[0079] Fig. 4Figure 1 shows a second embodiment of the input device 1, where again the same reference numerals or component designations are used for identical parts as in the preceding figures. Figs. 1 to 3 to be used. To avoid unnecessary repetition, reference is made to the detailed description in the preceding sections. Figs. 1 to 3 Reference has been made to or made in relation to the above. In particular, it may be provided that a large proportion of the components of the second embodiment of the input device 1 are designed identically to those in the first embodiment of the input device 1, and therefore a repetition of the description is not necessary.

[0080] As from Fig. 4It can be seen that a preloading device 29 is provided, which serves to press the first friction surface 19 against the second friction surface 20 when the coil 15 is de-energized. The preloading device 29 can, for example, be in the form of a spring element. Furthermore, the preloading device 29 can also be in the form of a permanent magnet.

[0081] The braking device 14, in particular the coil 15, can be configured such that, when the coil 15 is energized, the contact force of the first friction surface 19 against the second friction surface 20 can be reduced against the force of the preload element 29. This measure allows for a generally increased displacement resistance of the input element 4 relative to the base 3, whereby the displacement resistance can be reduced when the coil 15 is energized. This is implemented accordingly in the second embodiment. Fig. 4The mechanisms of the preloading device 29 described above can also be applied mutatis mutandis to the other embodiments.

[0082] In the Fig. 5 A third embodiment of the input device 1 is shown in the rest position 13. Fig. 6 The third embodiment of the input device 1 is shown in the actuation position 12. Fig. 7 The third embodiment of the input device 1 is shown in a further perspective view, this further view serving to better understand the structure of the input device 1.

[0083] Fig. 5 Figure 1 shows a sectional view of the second embodiment of the input device 1 for inputting control commands into the digital computer 2. The section plane used here is analogous to the representation in Figure 2. Fig. 1 chosen.

[0084] The further description of the first embodiment of the input device 1 is given by means of a summary of the Figures 5 to 7 .

[0085] In particular, the input device 1 may be coupled to the digital computer 2 via a means of data communication. Furthermore, the input device 1 may include a power supply by means of which it is powered.

[0086] As from Fig. 5As can be seen, the input device 1 may comprise a base 3 on which an input element 4 may be received. In particular, it may be provided that the input element 4 is coupled to the base 3 so as to be displaceable relative to the base 3 in a displacement direction 5. It may be provided that a guide receptacle 6 is formed in the base 3 and that the input element 4 is shaped to be complementary to the guide receptacle 6, such that the input element 4 is displaceably received in the guide receptacle 6. In particular, a sliding guide between the input element 4 and the base 3 may be implemented.

[0087] In particular, the input element 4 may be provided with an actuation surface 7. The actuation surface 7 may be freely accessible, allowing a user, for example, to touch it with their finger. The user can thus exert pressure on the actuation surface 7 and move the input element 4 in the displacement direction 5 relative to the base 3.

[0088] As from Fig. 5Furthermore, it can be provided that the input element 4 comprises a button 8, on which the actuating surface 7 can be arranged. In particular, it can be provided that the actuating surface 7 is arranged on a cover surface 9 of the button 8. Furthermore, it can be provided that the input element 4 comprises a button carrier 10, which can be slidably received in the guide receptacle 6. In particular, it can be provided that the button 8 is received on the button carrier 10. In particular, it can be provided that the button 8 is attached to the button carrier 10 by means of a positive and friction-fit connection.

[0089] Furthermore, it may be provided that a return spring 11 is formed, which is used to return the input element 4 from an actuation position 12, as described in Fig. 6 is shown, in a rest position 13, as shown in Fig. 5 As depicted, it serves its purpose.

[0090] In particular, it can be provided that the return spring 11 acts between the base 3 and the input element 4. As can be seen from the Fig. 5 and 6 It can be seen that the return spring 11 may act between the base 3 and the key carrier 10.

[0091] In particular, it can be provided that the key carrier 10 is received in the base 3 in such a form-fitting manner that it is forced into the rest position 13 by the return spring 11, forming a stop.

[0092] As from the Fig. 5 and 6 It can also be seen that a braking device 14 is provided which serves to influence the displacement resistance of the input element 4 to the base 3.

[0093] In particular, the braking device 14 may include a coil 15 wound around a winding shaft 16. In particular, the coil 15 may be mounted on a coil core 17.

[0094] Furthermore, it can be provided that a first friction surface 19 is formed on the coil core 17 and that a second friction surface 20 is formed on the input element 4, which interacts with the first friction surface 19. In particular, it can be provided that a corresponding frictional force can be achieved by the first friction surface 19 bearing against the second friction surface 20 and applying a normal force.

[0095] In particular, it may be provided that the second friction surface 20 is arranged on a friction element 21. The input element 4 may comprise the friction element 21. In particular, it may be provided that the friction element 21 is received in the key carrier 10.

[0096] In particular, it may be provided that the key carrier 10 is designed as an injection-molded part made of a plastic material which has form-fitting elements for receiving the friction element 21.

[0097] Preferably, a friction element carrier 22 is formed on the key carrier 10. The friction element 21 can be received in the friction element carrier 22.

[0098] As from the Figs. 5 to 7 As can be seen, the braking device 14 can be designed symmetrically with respect to a plane of symmetry 37 of the input device 1. In particular, a second friction element 31 can be provided, which is received in a second recess 32 of the friction element carrier 22. The friction element 21 and the second friction element 31 can each be slidably mounted on the key 8 and on the key carrier 10, respectively, in the direction of movement 26.

[0099] Furthermore, it can be provided that the coil 15 is configured such that the winding axis 16 is arranged parallel to the displacement direction 5 of the input element 4. It can also be provided that the coil core 17 comprises a first coil core part 33 and a second coil core part 34. In other words, the coil core 17 can be composed of the first coil core part 33 and the second coil core part 34. In particular, it can be provided that the first coil core part 33 and the second coil core part 34 are configured to receive the coil 15.

[0100] Furthermore, it can be provided that a third friction surface 35 is formed on the coil core 17 and that a fourth friction surface 36 is formed on the input element 4, which interacts with the third friction surface 35. In particular, it can be provided that a corresponding frictional force can be achieved by the third friction surface 35 bearing against the fourth friction surface 36 and applying a normal force.

[0101] In particular, the first coil core section 33 may have a first flange section 38 and a first cylindrical section 39. Furthermore, the second coil core section 34 may have a second flange section 40 and a second cylindrical section 41. The coil 15 may be arranged on the cylindrical sections 39 and 41 of the coil core sections 33 and 34, respectively.

[0102] The first cylinder section 39 and the second cylinder section 41 can be rotationally symmetrical about the winding axis 16. In particular, it can be provided that the coil 15 is mounted on the first cylinder section 39 and on the second cylinder section 41.

[0103] The first flange section 38 and the second flange section 40 can enclose or limit the coil 15 in the axial direction of the winding axis 16. In particular, it can be provided that the first friction surface 19 is formed on a first side of the first flange section 38 and the second flange section 40, and that the third friction surface 35 is formed on a second side of the first flange section 38 and the second flange section 40. Furthermore, it can be provided that the fourth friction surface 36 is arranged on the second friction element 31.

[0104] Furthermore, it may be provided that a central recess 42 is formed in the area of ​​the first cylinder section 39 or the second cylinder section 41. The first cylinder section 39 and the second cylinder section 41 can thus be concentric. In particular, it may be provided that the first cylinder section 39 or the second cylinder section 41 are manufactured by a deep-drawing process.

[0105] In particular, it may be provided that the return spring 11 is accommodated in the central recess 42.

[0106] In particular, it may be provided that a coil receptacle 24 is formed at the base 3, in which the coil core 17 and the coil 15 are received.

[0107] In particular, it can be provided that the coil core 17 is rigidly received in the base 3 and that the adjustment of the two friction surfaces 19, 20 to each other can be achieved by a corresponding displacement of the friction element 21 and that the adjustment of the two friction surfaces 35, 36 to each other can be achieved by a corresponding displacement of the second friction element 31.

[0108] This can be achieved, for example, by mounting the friction element 21 so that it is displaceable in a direction of movement 26 relative to the key carrier 10, and by mounting the second friction element 31 so that it is also displaceable in the direction of movement 26 relative to the key carrier 10. This can be achieved by a positive-locking mounting with corresponding freedom of movement, as is the case in Fig. 7This is evident. Appropriate retaining lugs may be provided to limit the movement of the friction element 21 and the second friction element 31.

[0109] In another embodiment, it can also be provided that the displacement of the friction element 21 and the second friction element 31 in the direction of movement 26 is achieved by making the friction element carrier 22 flexible and using the spring-elastic property of the friction element carrier 22 to enable the movement of the friction element 21 and the second friction element 31.

[0110] Based on a summary of Fig. 5 and 6 The functionality of the first embodiment of the input device will now be explained.

[0111] In the presentation of the Fig. 5The input element 4 is in its rest position 13. In this position, it can be held by the spring force of the return spring 11. By pressing the actuating surface 7 of the button 8, the user can push the input element 4 against the spring force of the return spring 11 towards its actuating position 12. This movement or position of the input element 4 can be detected by means of a sensing device 27.

[0112] The first friction surface 19 and the second friction surface 20 can slide against each other, whereby the normal force between the two friction surfaces 19, 20 is very small or zero. The third friction surface 35 and the fourth friction surface 36 can slide against each other, whereby the normal force between the two friction surfaces 35, 36 is very small or zero.

[0113] When the input element 4 reaches a specific position, the coil 15 can be energized. This allows a magnetic field to be generated. The magnetic field is represented by field lines 28, which are arranged around the coil 15. The field lines 28 pass through the coil core 17 and the friction elements 21, 31.

[0114] The magnetic field increases the normal force between the first friction surface 19 and the second friction surface 20, or presses them together. Furthermore, the magnetic field increases the normal force between the third friction surface 35 and the fourth friction surface 36, or presses them together. This increases the frictional force, thereby increasing the sliding resistance of the input element.

[0115] When the coil 15 is energized, the first friction surface 19 is pressed against the second friction surface 20 by displacement of the friction element 21. Simultaneously, the third friction surface 35 is pressed against the fourth friction surface 36 by displacement of the second friction element 31. Due to the frictional forces occurring symmetrically with respect to the plane of symmetry 37, tilting and thus jamming of the input element 4 is prevented.

[0116] 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 predefined current modes, a wide variety of haptic feedback can be provided to the user. If the user now reduces their pressure on the actuating surface 7 and, at the same time, the frictional force of the two friction surfaces 19, 20 and the two friction surfaces 35, 36, corresponding to the applied current to the coil 15, is less than a spring force of the return spring 11, then the return spring 11, following the movement of the user's finger, pushes the input element 4 into the rest position 13.

[0117] Fig. 8 Figure 1 shows a fourth embodiment of the input device 1 in a highly schematic representation, where again the same reference numerals or component designations are used for identical parts as in the preceding figures. Figs. 1 to 7to be used. To avoid unnecessary repetition, reference is made to the detailed description in the preceding sections. Figs. 1 to 7 pointed out or referenced.

[0118] As from Fig. 8 As can be seen, the friction element 21 may have a friction element insert 43, which is ferromagnetic and embedded in the friction element 21. The friction element insert 43 may extend over a limited area of ​​the friction element 21, with the second friction surface 20 being located outside the friction element insert 43. The first friction surface 19 may accordingly be located outside the coil 15, the coil core 17, or the outer casing 18 of the coil 15 and be coupled to the base 3.

[0119] The individual components can be configured such that, when the coil 15 is energized, a minimal distance is formed between the friction element 43 and the individual components, in particular the coil core 17 or outer casing 18, and friction occurs between the first friction surface 19 and the second friction surface 20. The first friction surface 19 and the second friction surface 20 do not necessarily have to be made of a ferromagnetic material, but can, for example, also be made of a plastic material or another material.

[0120] The in Fig. 8 The described design can be implemented mutatis mutandis in all of the previously described design variants, whether with only one friction element 21 or also with a second friction element 31.

[0121] Fig. 9Figure 1 shows a first embodiment of a keyboard 44 with several input devices 1. In particular, it can be provided that one or more of the input devices 1 are designed according to one of the above characteristics. Not shown separately is a vehicle or a machine which has an input device 1 according to one of the above characteristics. The input device 1 can, for example, be in the form of a separate key on a control panel or in the form of a key on a joystick or the like.

[0122] In another embodiment not shown, it is also conceivable that the input device 1 is designed, for example, as a slider. Such a slider can function without a return spring and remain in its position. Alternatively, it is also conceivable that such a slider is positioned in a specific position, for example a central position, by means of the return spring 11.

[0123] The exemplary embodiments show possible embodiment variants, whereby it should be noted at this point that the invention is not limited to the specifically illustrated embodiment variants, but rather various combinations of the individual embodiment variants are also possible and this possibility of variation lies within the skill of the person skilled in this technical field due to the teaching on technical action by the present invention.

[0124] The scope of protection is defined by the claims. However, the description and drawings must be consulted for the interpretation of the claims. Individual features or combinations of features from the different embodiments shown and described can, in themselves, represent independent inventive solutions. The problem underlying these independent inventive solutions can be found in the description.

[0125] All references to value ranges in this description are to be understood as encompassing any and all sub-ranges thereof, e.g., the reference 1 to 10 is to be understood as including all sub-ranges, starting from the lower limit 1 and the upper limit 10, i.e., 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.

[0126] Finally, for the sake of clarity, it should be noted that, for a better understanding of the structure, some elements have been shown not to scale and / or enlarged and / or reduced in size. Reference numeral list 1 Input device 32 second recess 2 digital computer 33 first coil core part 3 base 34 second coil core part 4 Input element 35 third friction surface 5 Direction of movement 36 fourth friction surface 6 Guided tour 37 plane of symmetry 7 Operating area 38 first flange section 8 button 39 first cylinder section 9 Cover surface 40 second flange section 10 Key carrier 41 second cylinder section 11 Return spring 42 central recess 12 Actuation position 43 Friction element insert 13 Resting position 44 Keyboard 14 Brake device 15 Sink 16 winding axis 17 coil core 18 outer shell 19 first friction surface 20 second friction surface 21 friction element 22 Friction element carrier 23 Axial direction 24 Coil holder 25 Recess for spool holder 26 Direction of movement 27 Recording equipment 28 Field lines 29 Preloading device 30 Exclusion 31 second friction element

Claims

1. An input device (1) for inputting control commands to a digital computer (2), the input device (1) comprising: - a base (3); - an input element (4) which is accommodated on the base (3) so as to be displaceable in a displacement direction (5), wherein the input element (4) has an actuating surface (7) for actuation by a user; - a braking device (14) for influencing a resistance to displacement of the input element (4) relative to the base (3), characterized in that the braking device (14) comprises the following elements: - a coil (15) for generating a magnetic field, wherein the coil (15) is wound around a winding axis (16); - a coil core (17); - a first friction surface (19) which is coupled to the base (3); - a second friction surface (20) which is coupled to the input element (4), wherein a pressing force of the first friction surface (19) on the second friction surface (20) can be varied by means of the magnetic field generated by the coil (15), whereby the resistance to displacement of the input element (4) can be influenced.

2. The input device (1) according to claim 1, characterized in that the input element (4) comprises a button (8), wherein the actuating surface (7) is arranged on a cover surface (9) of the button (8), wherein the second friction surface (20) extends at a right angle to the cover surface (9) of the button (8).

3. The input device (1) according to claim 1 or 2, characterized in that the second friction surface (20) is arranged on a friction element (21) which is formed from a ferromagnetic material and the first friction surface (19) is formed on the coil core (17).

4. The input device (1) according to claim 2 and 3, characterized in that the friction element (21) is rigidly accommodated on the button (8) or on a button carrier (10).

5. The input device (1) according to claim 4, characterized in that the coil core (17) is mounted on the base (3) so as to be displaceable in an axial direction (23) of a winding axis (16).

6. The input device (1) according to claim 2 and 3, characterized in that the friction element (21) is accommodated on the button (8) or on the button carrier (10) so as to be displaceable in a direction of movement (26) relative to the button (8) or to a button carrier (10), wherein the direction of movement (26) is at a right angle to the second friction surface (20).

7. The input device (1) according to claim 6, characterized in that a recess (30) for positively displaceable reception of the friction element (21) is formed in the button (8) or in the button carrier (10).

8. The input device (1) according to one of claims 3 to 7, characterized in that the first friction surface (19) is formed on the coil core (17) and that the friction element (21) and the coil core (17) are positioned relative to one another in such a way that the friction element (21) is pressed against the coil core (17) when the coil (15) is energized, wherein the magnetic field is conducted through the coil core (17) and the friction element (21).

9. The input device (1) according to one of the preceding claims, characterized in that a third friction surface (35) is formed, which is coupled to the base (3), and a fourth friction surface (36) is formed, which is coupled to the input element (4), wherein a pressing force of the third friction surface (35) on the fourth friction surface (36) can be varied by means of the magnetic field generated by the coil (15), wherein the second friction surface (20) and the fourth friction surface (36) are formed symmetrically with respect to a plane of symmetry (37) of the input element (4).

10. The input device (1) according to one of the preceding claims, characterized in that a return spring (11) is formed for returning the input element (4) to an initial position, wherein the coil core (17) has a central recess (42) in the region of the winding axis (16), wherein the return spring (11) is accommodated in the central recess (42).

11. The input device (1) according to one of the preceding claims, characterized in that the first friction surface (19) and / or the second friction surface (20) are arranged outside the effective range of the generated magnetic field.

12. A keyboard (44) having a plurality of input devices (1) for inputting control commands into a digital computer (2), characterized in that at least one of the input devices (1) is designed according to one of claims 1 to 11.

13. A vehicle or working machine having at least one input device (1) for inputting control commands into a digital computer (2), characterized in that the at least one input device (1) is designed according to one of claims 1 to 11.

14. A method for operating an input device (1) according to one of claims 1 to 11, which is coupled to a digital computer (2) and is used for inputting control commands into the digital computer (2), comprising the method steps: - detecting a position of the input element (4) by means of a detection means; - energizing the coil (15) and thereby generating a magnetic field when this is specified by the digital computer (2) and thereby changing the pressing force of the first friction surface on the second friction surface (20), whereby the resistance to displacement of the input element (4) is influenced.

15. The method according to claim 14, characterized in that when the coil (15) is energized, the pressing force of the first friction surface on the second friction surface (20) is increased and thus the resistance to displacement of the input element (4) is increased.

16. The method according to claim 14 or 15, characterized in that the energizing of the coil (15) is specified by the digital computer (2) when the input element (4) is actuated by a user and displaced to a specific position, which is detected by means of the detection means.

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