DE102022116024A1 - Braking device and game controller - Google Patents

Abstract

Braking device (1) and game controller (100) with a braking device (1) in particular for braking a movement of control elements (101) such as. E.g. control buttons, operating levers, push buttons. The braking device (1) comprises a first braking component (8) extending along an axial longitudinal direction (19) and a second braking component (3) made of a magnetically conductive material and a magnetic field generating device (24). The first braking component (8) is movably received on the second braking component (3) along the axial direction (19). An effective gap (5) filled with a magnetorheological medium (13) is formed between the first brake component (8) and the second brake component (3), which is sealed at the axial ends via a sealing device (12).

Description

The present invention relates to a braking device for varying an actuation force of an actuation element or for generating a braking torque. In particular, the invention relates to a magnetorheological operating device for setting operating states.

A wide variety of game controllers and other operating devices and operating devices have become known in the prior art, in which different operating elements, such as control buttons, operating levers and the like, are operated in order to operate and control computer games or technical devices from the home or from the work area.

When controlling computer games, buttons or keys, also called trigger elements, are often provided, which are often spring-loaded pressure or oscillating elements, when actuated, something is triggered in the computer game and, in particular, an input is made in the computer game. For example, it can be used to trigger the start of a machine or the trigger of a weapon in the computer game, or to turn on the lighting of a building in the computer game or in a simulation, or the like.

In principle, high demands are placed on such operating devices. A braking device should have the smallest possible space requirement and preferably combine low costs with low energy consumption. The installation space for game consoles and game controls such as game controllers and other operating devices is often very limited and, in particular, limited. An outer contour is often predetermined by an ergonomic design or should not be influenced or even changed, or only minimally, by a control element and its technical dimensions or structure, since this is ergonomically important and, for example, B. has been known for many years, so that the outer contour is often an identifying feature. In addition, game consoles and operating devices are subject to high price pressure, which is why often only very cost-effective solutions are possible. In addition, for reasons of convenience, such control devices are often used wirelessly, so power consumption and therefore battery life are important.

Initially, in the prior art, these actuating elements were only equipped with a sensor and a return spring, whereby the sensor passed on the user's request to the computer or the game and the spring then reset the control element. As development progressed, vibration elements were installed to provide additional feedback. In 2020, Sony refined the feel of the trigger button on the Playstation 5 and integrated an electric motor with a worm gear and several gear stages. The electric motor interacts with the swivel button and thus with the user, so that the user has to press against a variable resistance depending on the game situation or feels and perceives the resistance when actuating. Basically the system works. However, the haptic feedback could be varied more finely and the force that can be applied could be greater. The advantage of the known system is that a basic force, i.e. H. the minimum possible force against which a user has to work is low or a corresponding basic moment is low. Basic forces must not be too high, otherwise the user (or their fingers) will tire too quickly. Depending on the user and the game or application or technical area, the requirements for the forces to be applied vary.

With such game controllers or other operating devices, the user usually presses a control button or a control element with his finger. Often the movement of the finger is converted into a pivoting movement via a pivot point. This pivoting movement can be converted into a rotational movement at a higher speed via one or more gear stages.

To dampen such rotational movements, attempts have also been made to use magnetorheological braking devices, preferably with a rotary damper. With a rotary damper, a very low basic torque and a high maximum torque and thus a high spread of the torque that can be generated can be achieved. Magnetorheological rotary dampers can be sealed using low-friction seals, since small seal diameters only produce low frictional moments during rotary movements. Actuators with magnetorheological fluids require good seals because long-term functionality must be guaranteed given the high number of cycles required. However, due to the space requirements, it is not always possible to use rotary dampers to generate braking torque.

It is therefore the object of the present invention to provide a braking device, in particular for game controllers and other operating devices, which requires little installation space and also functions reliably over the long term. In particular, the braking device should be inexpensive to produce and should preferably be low in weight.

This object is achieved by a braking device with the features of claim 1. Preferred developments of the invention are the subject of the subclaims. Further advantages and features of the present invention emerge from the general description and the description of the exemplary embodiments.

A braking device according to the invention is used in particular to brake a movement of (in particular pivotable, rotary or linear) control elements such as control buttons, control levers, push buttons and other control parts. The braking device comprises at least a first braking component extending along a longitudinal direction and a second braking component comprising at least partially a magnetically conductive material and a magnetic field generating device. The first braking component is movably received on the second braking component along the axial longitudinal direction. An effective gap filled (at least partially) with a magnetorheological medium is formed between the first brake component and the second brake component and is sealed at the axial ends via a sealing device.

The braking device according to the invention has many advantages. A significant advantage of the braking device according to the invention is that in the linearly movable braking device only the effective gap is filled with a magnetorheological medium. Advantageously, no separate fluid chambers or reservoirs are necessary between which the magnetorheological medium preferably has to be pumped back and forth depending on the direction of movement. As a result, this linear braking device can advantageously be designed to be particularly small and lightweight. In addition, the braking device according to the invention can be manufactured particularly cost-effectively, so that it is preferably also suitable for use in game controllers or computer keyboards. Advantageously, a displacement resistance or a resistance to displacement of the brake components relative to one another is variable by applying a magnetic field to the magnetorheological medium in the effective gap and can in particular be increased compared to the basic force, so that a user can perceive a changing resistance.

The magnetically conductive second brake component is in particular at least one component of a magnetically conductive stator unit. The stator unit can advantageously comprise a plurality of preferably magnetically conductive housing parts or components. The first braking component is in particular at least one component of a linear actuator unit or rotor unit movably accommodated on the stator unit. Preferably, the linear actuator unit, preferably the first braking component and the stator unit are arranged coaxially and preferably concentrically to one another along at least the movement axis or longitudinal axis of the linear actuator unit. The linear actuator unit is expediently arranged at least partially radially within the stator unit. The stator unit advantageously encloses the linear actuator unit completely and/or along an entire circumference of the linear actuator unit.

The second brake component is preferably designed as a, in particular cylindrical, sleeve or as a sleeve-shaped part, which encloses the first brake component at least partially along the circumference. In particular, the second brake component completely surrounds the first brake component. The second brake component can expediently also form a housing part and/or be designed as such.

The magnetorheological medium preferably comprises magnetorheological particles and gas as a filling medium. In particular, no or largely no or at least almost no liquid components are contained in the effective gap. As a result, the sealing device can be designed in such a way that only one seal has to be provided for the magnetorheological particles. Gas exchange with the environment is advantageously possible and unproblematic. The gas used is preferably a gas mixture and in particular air. This allows a particularly low basic friction and thus a basic force to be achieved, so that a ratio of the maximum braking force that can be generated to the basic force required for the movement is very high. Advantageously, with gas and especially air as the filling medium, leaks are unproblematic and compensate for each other during operation.

Alternatively or additionally, the magnetorheological medium can also contain liquids, such as. B. include oils or fats. The magnetorheological particles can advantageously be finely dispersed in the liquid or fat, so that a homogeneous distribution of the particles in the filling medium and thus in the effective gap can be permanently ensured. For the purposes of this application, a grease also includes all thickened lubricants, preferably also saponified oils.

In addition, the magnetorheological medium can also comprise a mixture of several filling media, in particular gases, liquids and/or fats. The positive properties of the individual filling media or fluids can advantageously complement each other.

In a preferred development, the effective gap contains more than 40 percent by volume of magnetorheological particles. Particularly preferably, the effective gap is filled to more than 50, 60 or 80 percent by volume with magnetorheological particles. It is preferred that the effective gap is filled to less than 95 percent by volume with magnetorheological particles.

A high volume fraction of magnetorheological particles within the effective gap advantageously enables a high braking torque. At the same time, the magnetorheological particles behave almost like a fluid and can be displaced accordingly. Preferably, the magnetorheological particles each or in the majority or over 90% or 100% have a maximum external diameter of less than 200 μm and in particular less than 100 μm. In preferred embodiments, a typical diameter of the magnetorheological particles is between 10 and 50 μm.

In preferred developments, the magnetorheological particles (each) consist predominantly of carbonyl iron powder and can have a coating to prevent corrosion and/or to improve the sliding behavior (sliding coating). This ensures long-term and advantageously maintenance-free operation. Such an addition or coating may include or include graphite, molybdenum, bronze and the like. Such additions can improve sliding and also reduce or eliminate squeaking.

The magnetorheological medium preferably comprises an addition of graphite. It is possible for a (thin) graphite layer to be applied at least in sections to some (or all) of the magnetorheological particles. It is also possible for a certain proportion of graphite to be added to a certain volume of magnetorheological particles.

The magnetorheological medium is advantageously accommodated in at least one receiving body. A receiving body is preferably at least partially covered by a random fiber material, such as. B. a ball of one or more (fabric) threads and/or a foam is formed. In addition, other receiving bodies such as porous media and in particular sintered materials are also possible. The random fiber material is preferably arranged within the knitting gap. The receiving body advantageously contributes to the more homogeneous distribution of the magnetorheological medium and in particular the magnetic particles. Because the receiving body holds the magnetorheological medium and expediently also its components in place during relative movements, the risk of (global) agglomeration of the magnetorheological medium and preferably the magnetic particles at one point or at one end of the effective gap is reduced or even completely prevented . In addition, the receiving body can z. B. in the case of a foam also act like a sponge, which absorbs and stores the magnetorheological medium and preferably a liquid filling medium and reduces the risk of leaks.

In particular, at least one effective surface of the effective gap is designed to be flat, at least in sections, in its axial direction (i.e. along the longitudinal extent of the effective gap). In this case, the magnetorheological medium in the effective gap is advantageously subject to a pure shear load, which is particularly (precisely) predictable.

Preferably, the effective surface of the effective gap has a (periodic) cross-sectional narrowing at least in sections in its axial direction and is in particular wavy. In the case of a wavy effective surface, “mountain and valley sections” alternate, with the effective gap in the area of a “mountain” having a smaller height than in the area of a “valley”. In the area of the “mountains” of the active surfaces, magnetorheological media and the magnetic particles they contain are particularly concentrated, so that a “wedge effect” is created and particularly high forces can be transmitted. Preferably, the transition between “mountains and valleys” is smooth and/or without jumps and edges and/or continuously differentiable in order to ensure a flow in the effective gap, e.g. B. not to be negatively influenced by separation vortices. A height between a “mountain and a valley” is in particular between 5% and 50% of the height of the effective gap or even up to 75% or even 90% of the height of the effective gap.

In addition, the active surface can also have any shape and in particular have jumps or can also fall or rise (strictly) monotonically in one direction in order to positively influence the flow in the effective gap and in particular to optimize the power transmission between the moving components.

In particular, the sealing device is accommodated on the first brake component. Advantageously, the effective gap between the sealing devices moves with the first braking component and the relative position of the effective gap to the first braking component is unchangeable. Alternatively, the sealing device is preferably accommodated on the second brake component, so that a position of the effective gap relative to the second brake component is unchangeable.

The sealing device preferably comprises at least one or more sealing units. A sealing unit of the sealing device expediently seals the effective gap without contact between the parts moving towards one another, in particular the first and second brake components. Advantageously, a non-contact seal is virtually or at least virtually seal-free and in particular offers a particularly low resistance to movement.

Alternatively, the sealing unit of the sealing device preferably seals the effective gap at least partially in contact with it. At least a part of the sealing unit at least partially touches a wall of the second brake component or the first brake component on the effective surface or sealing surface of the effective gap, on which the sealing device is not accommodated. The contacting sealing unit can expediently be designed, for example, as an O-ring or as a sealing ring such as a felt ring or the like. Preferably, the contacting seal unit at least partially comprises a rubber or a PTFE (polytetrafluoroethylene) seal. Contact seals offer the advantage that they work robustly and reliably and mechanically seal and/or close and/or cover the effective gap.

In particular, the sealing device or the sealing unit has at least one sealing gap of at least less than 0.3 mm or preferably less than 0.15 mm or in particular less than 0.075 mm or particularly preferably a sealing gap of less than 0.05 mm or also very particularly preferably less than 0 .01 mm to the effective surface of the effective gap or a sealing surface, which results between the first brake component and the passage on the second brake component when the sealing device is accommodated on the first brake component. If the sealing device is accommodated on the second brake component, the sealing surface is defined accordingly.

Preferably, the sealing device and/or the sealing unit comprises at least one (mechanically sealing) sealing lip which, when installed, has a sealing gap which is permeable to liquid and which in particular retains the magnetorheological particles. Alternatively, the sealing lip can also seal completely in contact, so that no sealing gap remains. Sealing lips are particularly cost-effective and are advantageous (also) in conjunction with other sealing units to ensure a reliable and permanent seal of the effective gap.

The term “liquid-permeable” here means that pure liquid water would at least partially pass through the sealing gap at, for example, a temperature of 20 °C. In the long term, water (or a carrier oil) would be able to escape at least partially in this configuration. Advantageously, pressure compensation can also be made possible in the event of temperature changes and density changes of the magnetorheological medium and preferably of the filling medium.

In particular, the sealing device and/or the sealing unit comprises at least one (preferably non-contact or even touching) labyrinth seal. Preferably, a sealing labyrinth of the labyrinth seal is arranged at least partially on the side of the effective gap (the first braking component and/or the second braking component) on which the sealing device is accommodated. The sealing labyrinth particularly advantageously includes e.g. B. several chambers connected along a sealing gap or a sealing surface, so that an escape of the magnetorheological medium or its components from the effective gap is effectively prevented or at least (strongly) reduced. A labyrinth seal can also advantageously be used to seal components that move axially towards one another. A labyrinth seal advantageously seals reliably and independently of external forces such as magnetic fields.

In preferred embodiments, the sealing device and/or the sealing unit comprises at least one magnetic seal, in particular with at least one non-contact sealing gap. The magnetic seal can be formed by one or more permanent magnets. The magnetic seal is preferably designed as a magnetic ring. However, it is also possible for the magnetic seal to be created via at least one or more electric coils. A magnetic field from an electric coil could also support the sealing effect if necessary. Advantageously, the magnetic seal can also comprise a sealing fluid, such as a ferro-fluid, which is held in the sealing gap by the magnetic forces and thereby seals the sealing gap permanently and with little wear mechanically and in contact or even in a non-contact manner.

It is also possible for both an (almost) touching sealing lip and an additional (non-contact) magnetic seal to be included as sealing units by the sealing device.

In an advantageous embodiment, the sealing device and/or the sealing unit comprises at least one magnetic particle collector. The particle collector is advantageously arranged axially outside the effective gap and from which When viewed from the outside, the effective gap is arranged on the sealing device, in particular behind the sealing device. The particle collector preferably comprises, for example, a (strong) magnetic source, such as a permanent or permanent magnet or an electric coil, and is arranged in the vicinity of the sealing gap, so that magnetic particles that emerge from the effective gap are collected on the particle collector and adhere there, so that These individual particles cannot get into the environment or even lead to a mechanical malfunction.

In all embodiments, it is particularly preferred that the braking device and in particular the magnetic field generating device comprises at least one electrical coil unit. Preferably, the braking device and in particular the magnetic field generating device comprises at least one (magnetically conductive) core. The core is particularly preferably formed on the first brake component and preferably at least partially on the first brake component. Preferably, the first brake component comprises several components or the first brake component is constructed from several components. The first braking component advantageously comprises at least one magnetically conductive core and/or a coil holder as well as other components.

For a low basic torque, a core made of a material without a “residual field” or only with a lower residual field is preferably advantageous, when the magnetic field of the magnetic field generating device is eliminated, i.e. H. none or only a weak or almost no hysteresis. It has been found that silicon steel and soft magnetic cobalt-iron alloys such as “Vacoflux”, a 17% cobalt-iron alloy, are particularly suitable for this. The core can advantageously be produced as a cast solid or as a sintered material.

Preferably, the remaining components of the first brake component have a (significantly) lower magnetic conductivity than the (magnetically conductive) core. A ratio of the magnetic conductivities of the core to other components is advantageous, in particular greater than 10 or 100 or 1000 or even 10,000 or even more. Advantageously, the magnetic field lines of the magnetic field of the coil unit and in particular of the magnetic field generating device are guided specifically in the direction of the effective gap and through it, so that the effect of the magnetic field is improved and advantageously maximized. At the same time, scattering of the magnetic field is advantageously minimized. In addition, the components with at least low magnetic conductivity can preferably be made from a plastic (inexpensive).

The electrical coil unit is preferably at least partially wound in the longitudinal direction around the first braking component, and advantageously around the coil holder, such that a vertical on the plane (substantially) spanned by the coil unit is aligned transversely and in particular perpendicular to a winding plane spanned by the coil windings . This practically means that an axis of symmetry of the windings does not extend along the longitudinal direction, but that the coil unit is wound transversely to it, so that the magnetic field of the coil unit extends perpendicular or at least transversely to the longitudinal direction. The coil unit is advantageously cast on the core using a suitable filling material.

The magnetic field of the electrical coil unit then expediently enters from the core through the effective gap into the housing part surrounding the core and comprising a magnetically conductive material and runs along a peripheral wall to the opposite side, where the magnetic field again passes through the effective gap between the core and the second braking component passes through. The magnetic field lines can thus be closed. It is also possible for a plurality of arms to be arranged radially distributed over the circumference of the core, on each of which an electrical coil unit is accommodated, so that a plurality of electrical coil units are arranged on the circumference of the brake component or an enclosed piston, each of which generates separate magnetic fields.

Preferably, the first brake component comprises a cable bushing in order to guide connecting cables of the coil unit and in particular of the magnetic field generating device to the outside. The cable bushing is expediently designed at least partially within the first brake component, so that, for example, connecting cables of a coil unit can be easily routed to the outside.

In a preferred embodiment, the magnetically conductive second braking component extends between the ends of the effective gap. Preferably, the magnetically conductive core extends between the sealing devices that limit the effective gap. Preferably, the sealing devices are arranged axially outside the second brake component and/or the first brake component. Advantageously, the sealing devices are not influenced by a magnetic field of the coil unit and in particular the magnetic field generating device or only to a significantly lesser extent influenced than if the sealing devices are arranged at a position axially within the second brake component and / or the core. This can be particularly advantageous if the sealing unit is designed as a magnetic seal, since mutual influence of the magnetic fields can be minimized.

Alternatively, it is also possible to arrange the sealing device at a position at least partially axially within the sealing devices, in order to preferably obtain a particularly small braking device. These are advantageous for this, for example: B. mechanically touching sealing units, such as sealing rings, which are not influenced by the magnetic field generating device.

In particular, a receiving space extends at least partially (also) through the second brake component, in which the first brake component is accommodated. The receiving space advantageously also extends through further parts and components, preferably also an (outer) housing. Preferably, the first braking component is arranged radially inside of the second braking component. The second brake component advantageously encloses the first brake component along its circumference, advantageously completely.

A minimum internal cross section of the receiving space is expediently adapted to the outermost cross section of the first braking component at least in sections and preferably along the effective gap.

In advantageous embodiments, the outermost cross section of the first brake component and the minimum inner cross section of the receiving space are designed to be rotationally symmetrical at least in sections. Alternatively, the first brake component has, at least in sections, a non-round outer and in particular outermost cross section. A minimum internal cross section of the receiving space is preferably adapted to the outermost cross section of the first brake component. In particularly preferred embodiments, the first braking component has a substantially constant external cross section over its length. Accordingly, the internal cross section of the receiving space is preferably uniform over at least a substantial part of the length of the housing or the receiving space. Advantageously, the angular orientation in a circumferential direction is precisely defined or, in other words, the first brake component only fits in one orientation into the second brake component or the outer housing.

In particularly preferred developments, the first braking component is polygonal, polygonal with rounded corners, oval or, for example, kidney-shaped, at least in sections and preferably in the area of the effective gap transversely to its longitudinal extent. Such configurations are made possible cost-effectively in particular by the fact that magnetorheological particles are accommodated in the effective gap without a carrier liquid. This makes sealing much easier, which is often difficult with liquids and angular designs. A V-shaped or U-shaped or C-shaped or semicircular piston cross section with two legs that meet at their middle ends enables particularly space-saving designs while at the same time having particularly large effective areas of the effective gap. Solutions that can be used in series production can also be advantageously implemented. The first brake component is (as a result) advantageously accommodated in the receiving space, in particular almost or completely in a non-rotatable manner. For this purpose, a rotary movement or a pivoting movement of an operating element can be reliably converted into a linear movement on the first brake component.

The receiving space of the magnetically conductive second brake component is advantageously filled with air or gas and is opened to the outside through a ventilation channel in order to enable gas exchange and to prevent compression of the gas in the receiving space.

In advantageous embodiments, at least one sensor device for detecting a measure of a position of the first brake component is included. Such a sensor device can directly detect a position of the first brake component and can be designed, for example, as a linear sensor. It is also possible for the sensor device to detect an angular position, which is converted into a linear position of the first brake component based on the known installation situation. The sensor device preferably comprises at least one Hall sensor. Such a sensor device, which is based on the Hall effect, advantageously enables an exact measurement of an axial position with high and repeatable accuracy, so that it is particularly suitable for passing input information or input requests from a user to a computer program such as a computer game. At the same time, a change in position can be resolved particularly finely and particularly continuously over the (in particular entire) travel path.

Alternatively or additionally, the sensor device can also in particular be an infrared sensor or an ultrasonic sensor or the like include to detect the position of a (relatively) moving component of the braking device.

Preferably, the cross section of the receiving space is constant over the intended travel path, so that the first braking component can be moved over the entire travel path.

The effective gap is preferably formed between the first braking component and the inner wall of the receiving space. Preferably, a ratio of the maximum diameter of the first braking component at least in the area of the effective gap transverse to its longitudinal extent to a height of the effective gap is greater than 10 or greater than 20 and even preferably greater than 30. Advantageously, a large ratio makes the effective gap small in relation to first brake component, in particular a piston included. The effective gap therefore preferably represents a small magnetic resistance through which the magnetic field can easily pass.

The magnetically conductive second brake component advantageously forms at least one component of an outer housing with at least one further housing part. The outer housing expediently comprises the magnetically conductive second brake component and at least one further housing part. In particular, the magnetically conductive second brake component is accommodated on the outer housing. The receiving space preferably extends through the entire outer housing and in particular also through the second brake component.

Preferably, the at least one further housing part of the outer housing has a lower magnetic conductivity than the magnetically conductive second brake component. In particular, a ratio of the magnetic conductivity of the magnetically conductive second brake component to other components of the outer housing is in particular greater than 10 or advantageously 100 or preferably greater than 1000, 10000 or even more. Advantageously, one further component of the outer housing or the remaining components is not or only particularly poorly magnetically conductive. This advantageously improves the alignment of the magnetic field lines, so that the magnetic field can align itself particularly effectively and scattering is minimized. The at least one further housing part of the outer housing is advantageously made of plastic and can therefore advantageously be manufactured particularly cost-effectively, preferably in series production by injection molding or equivalent manufacturing processes. Preferably, the magnetically conductive second brake component is made of the same or a very similar material as the core.

Preferably, an outer end of the first brake component and an end of the outer housing or the first brake component facing away from it can each be pivoted, in particular on a console. The braking device can thereby advantageously align itself along a force acting on a control element. For example, if the braking device is attached to a pivoting control, such as a lever or rocker, the angle of an applied finger force may change to a fixed and non-pivoting axis as the user operates the control as the user's finger moves along a circular path moves around the pivot point of the control element and thus also the actuating force emanating from the finger, which acts on the braking device. Such forces acting transversely to the direction of movement can become problematic if this causes the first braking component to tilt or possibly bend or even break. Due to the pivotable receptacle, the first braking component can advantageously align itself independently along the acting force or a (pivoting) position of the control element, so that the risk of tilting relative to the second braking component is minimized or at least significantly reduced and actuation forces are advantageously in the direction of movement of the first Brake components act. In particular, the pivotable receptacle is designed as a ball head or joint socket or as a circular bore (receiving eye), which can be accommodated in the console via a corresponding joint socket or a pin and a second bore. In addition, the pivotable receptacle makes it possible to operate the braking device over large pivot angles of the actuating element.

Preferably, the first brake component and/or the first brake component is preloaded into at least one rest position relative to the second brake component via a preload unit. The preload unit can be accommodated outside the receiving space and preferably outside the second brake component or the outer housing. However, it is also possible for the preload unit to be accommodated within the second brake component or even within the first brake component. The preload unit advantageously comprises at least one spiral spring, a torsion spring or the like, which are inexpensive and robust.

The first brake component advantageously comprises at least one piston and/or at least one piston rod.

Preferably, a length of the piston or the first brake component along the longitudinal direction is greater than a maximum diameter of the piston or the first brake component. Advantageously, a guide length of the piston or the brake component on the inner wall along the other brake component is so long in relation to the diameter that the risk of tilting due to forces acting transversely to the direction of movement is minimized. In preferred developments, the piston or the first brake component is at least 50% wider than it is tall transversely to its longitudinal extent. The piston or the first brake component can also be twice or three times as wide as it is high. A wide and flat piston or a wide and flat first brake component can also be fitted into small installation spaces.

In particular, a ratio of the outside diameter of the second brake component to an outside diameter of the first brake component is less than two.

The receiving space is preferably divided into two different subspaces by the first brake component, in particular the (linearly movable) piston.

A game controller according to the invention comprises an operating element or an operating button or the like and a (magnetorheological) braking device for braking the movement of the operating button or the operating element or the like. The braking device comprises a first braking component extending along an axial longitudinal direction and a second braking component made of a magnetically conductive material with a and in particular elongated receiving space formed therein and a magnetic field generating device. The first brake component is at least partially accommodated movably in the receiving space along the longitudinal direction and is preloaded into a rest position via a preloading unit. An effective gap is formed between the first brake component and the second brake component, which is sealed at its axial ends via a sealing device. The effective gap is at least partially filled with a magnetorheological medium. The game controller according to the invention also has many advantages. The game controller allows for a simple and durable setup. The maximum braking force that can be generated when the control button of the control element is pressed is high, while the minimum necessary basic force is very low.

Preferably, the first brake component comprises a piston accommodated in the receiving space and a piston rod, in particular, projecting outwards from the receiving space. Further advantageous developments result from the entire description and from all (sub)claims.

The invention not only makes it possible to provide a braking device for a game controller, but its use is also conceivable and possible on computer keyboards, exoskeletons, prostheses and/or when operating machines or other devices.

At the end of the first brake component or the second brake component (i.e. at one end of the two parts moving towards each other) an active element can also be attached (such as an electric motor, a spindle drive, a solenoid, a piezo actuator, a voice coil, etc.). ..). This allows an active force to be generated. The linear brake would preferably be locked (blocked) when the active element is switched on. The adaptive linear element can also dampen or influence the movement of the active element.

Because a “dry” magnetorheological medium is preferably used and does not contain any oil or hydraulic fluid, the basic torque or basic friction can be reduced. In particular, the sealing device can be changed in such a way that the basic friction is significantly reduced. If necessary, a touching sealing lip can advantageously be dispensed with and the sealing is carried out solely by a magnetic seal.

Further advantages and features of the present invention are described in the exemplary embodiments, which are explained below with reference to the accompanying figures.

• 1a-1g verschiedene Ausgestaltungen von Vorrichtungen, insbesondere Bedieneinrichtungen, mit erfindungsgemäßen Bremsvorrichtungen;
• 2 eine perspektivische Ansicht einer erfindungsgemäßen Bremsvorrichtung in einer Einbausituation mit einem schematisch dargestellten Bedienelement;
• 3a-e einen stark schematischen Schnitt durch eine erfindungsgemäße Bremsvorrichtung sowie stark schematische Detailansichten und eine stark schematische Schnittansicht;
• 4 u. 5 zwei Schnitte in eingefahrenem und ausgefahrenem Zustand der Bremsvorrichtung nach 2;
• 6 u. 7 eine perspektivische geschnittene Darstellung der Ausführungsform der Bremsvorrichtung und eine weitere perspektivische Darstellung der Bremsvorrichtung nach 2;
• 8 eine schematische Schnittdarstellung einer weiteren Ausführungsform einer Bremsvorrichtung;
• 9 u. 10eine schematische Schnittdarstellung einer weiteren Ausführungsform einer Bremsvorrichtung eingefahrenen und ausgefahrenen Zustand;
• 11 - 13 weitere Schnitt und Detailansichten der Ausführungsform nach 9 und 10; und
• 14 u. 15 isometrische Ansichten der Ausführungsform nach 9 und 10 im ausgefahrenen und eingefahrenen Zustand.

Show in it:

• 1a-1g various configurations of devices, in particular operating devices, with braking devices according to the invention;
• 2 a perspective view of a braking device according to the invention in an installation situation with a control element shown schematically;
• 3a-e a highly schematic section through a braking device according to the invention as well as highly schematic detailed views and a highly schematic sectional view;
• 4 u . 5 two cuts in the retracted and extended state of the braking device 2 ;
• 6 u . 7 a perspective sectional view of the embodiment of the braking device Direction and another perspective view of the braking device 2 ;
• 8th a schematic sectional view of a further embodiment of a braking device;
• 9 u . 10 shows a schematic sectional view of a further embodiment of a braking device in the retracted and extended state;
• 11 - 13 further section and detailed views of the embodiment 9 and 10 ; and
• 14 u . 15 isometric views of the embodiment 9 and 10 in extended and retracted states.

1a until 1g show several operating devices 100 according to the invention, in which the magnetorheological braking device 1 can be used. The operating devices 100 are each designed as a haptic operating device 100 with an operating element 101.

1a shows a haptic control button 101. The control button 101 can be rotated or pivoted and also preferably moved in a direction along the axis of rotation. An axial movement or a pivoting movement can advantageously be influenced by the braking device 1 according to the invention, as in the following embodiments.

In 1b the operating device 100 is shown as a thumb roller 102. The thumb roller 102 can preferably be used in steering wheels, for example. However, the thumb roller is not limited to this application. The thumb roller 102 can generally also be used with any other finger, depending on the installation situation. The thumb roller is preferably rotatable about an axis of rotation and, in particular, displaceable along the axis of rotation.

In 1c and 1d the operating device 100 is arranged in a computer mouse 103. The haptic operating device 100 is housed in the mouse wheel 106. The magnetorheological braking device 1 can be used to control haptic feedback, in particular during a displacement along the axis of rotation.

1e shows a joystick 104 as a haptic operating device 100, in which a braking device 1 is accommodated.

In addition, the braking device 1 according to the invention can preferably be used in a game controller 100 in order to give the player haptic feedback depending on the game situation, in particular when actuating the control buttons 101, control lever 101, pushbuttons 101, etc., see 1f . In 1g the game controller 100 is shown in a side view. The braking device 1 according to the invention is arranged inside the game controller 100 (dashed lines). The control element 101 is formed here by a rocker or a lever 101, which can be pivoted about the angle of rotation 41. If a user presses the control element 101, this movement is transmitted to the braking device 1. The braking device 1 according to the invention is so small that the outer contour of the game controller is not influenced by the braking device 1. In addition, the braking device 1 according to the invention is particularly light, so that the braking device 1 does not negatively influence the weight of the game controller 101. Furthermore, the braking device 1 according to the invention can be manufactured inexpensively in series or mass production.

2 shows a perspective view of a braking device 1 according to the invention in an installation situation with a schematic control element 101, as z. B. can be used in a game controller 100. The braking device 1 is pivotally mounted on a console 2 at an outer end 37 of a first brake component 8 and an opposite end 38 of a second brake component 3, here by ball joints with ball heads and joint sockets. This allows the braking device 1 to align itself with the actuating force 42 or depending on the pivot angle 41, so that the actuating force 42 acts along the longitudinal direction 19 of the piston rod 9 of the first braking component 8, so that the braking device 1 can be moved smoothly and does not tilt. Further advantageously, large pivot angles are also possible thanks to the pivotable mount.

3a-e show a highly schematic section through a braking device 1 according to the invention as well as detailed views and a sectional view. 3a shows a highly schematic section through a braking device 1 according to the invention for braking a movement of an operating element 101 of an operating device 100. The braking device 1 comprises a first braking component 8 extending along the axial longitudinal direction 19 and a second braking component 3 made of a magnetically conductive material. A receiving space 4 extends through the second brake component 3. The first braking component 8 is movably received in the receiving space 4.

The first brake component 8 divides the receiving space 4 into different subspaces 6, 7. The first brake component 8 includes one in the Piston 10 accommodated in the receiving space 4 and a piston rod 9 projecting outwards from the receiving space 4. An effective gap 5 filled with a magnetorheological medium 13 is formed between the first brake component 8 and here more precisely its piston 10 and the second brake component 3, which is at the axial ends is each sealed via a sealing device 12. Here, the magnetorheological medium 13 can include magnetorheological particles 14 and a gas as a filling medium 14a. In addition, the filling medium 14a can also be formed by a liquid, such as a (carrier oil), or a fat. The magnetorheological medium 13 is advantageously only present in the effective gap 5.

The effective gap 5 here advantageously contains between 40 and 95 percent by volume of magnetorheological particles 14. The magnetorheological particles 14 each consist of carbonyl iron powder. Due to the high particle concentration, the magnetorheological particles 14 themselves behave like a fluid, with the effective gap 5 not becoming clogged.

The particles 14 each have a coating to prevent corrosion. In addition, the particles 14 have a sliding coating, here in the form of a graphite additive, which is applied to the particles 14 in sections as a thin graphite layer. This improves the sliding behavior and enables long-lasting and reliable operation.

The effective gap 5 is here at each end via a sealing device 12 with a sealing unit 15 between the parts moving towards one another, i.e. H. the first brake component 8 and the second brake component 3, sealed and limited. The sealing devices 12 are accommodated here on the first brake component 8 and more precisely on its piston 10, so that the effective gap 5 moves with the piston 10 or the first brake component 8.

The braking device 1 further comprises a magnetic field generating device 24 designed as an electrical coil unit 24a and a magnetically conductive core 26. The magnetically conductive core 26 is formed here on the first brake component 8 and more precisely on the piston 10. The electrical coil unit 24 is wound in the longitudinal direction 19 around the first brake component 8 and more precisely around the piston 10. The piston rod 9 extends along the longitudinal direction 19. This creates a vertical on the plane 24c spanned by the coil unit 24, transversely and in particular perpendicular to a winding plane 25 spanned by the coil windings. The magnetic field 24b is guided through the magnetically conductive second braking component 3 and the magnetically conductive core 26 and passes through the effective gap 5 here, so that the magnetic particles 14 align themselves along the magnetic field 24b and the viscosity of the magnetorheological medium 13 can thereby be changed. A movement of the first brake component 8 relative to the second brake component 3 can be braked and influenced in this way. The piston 10 of the first brake component 8 is here preloaded into a rest position 43 by a preloading unit 39. Here, the preload unit 39 is accommodated outside the piston 10 of the first brake component 8 but within an outer housing 3b.

In the lower part, a receiving body 14b is additionally arranged in the effective gap 5. The receiving body 14b is designed as a random fiber material or foam with individual connected spaces. The receiving body 14b contains the magnetorheological medium 13 and in particular the magnetorheological particles 14. With its internal structure, the receiving body 14b advantageously prevents (global) particle agglomeration occurring at one point of the effective gap 5 and, accordingly, other areas of the effective gap 5 significantly fewer particles 14 or even at all no longer have any particles 14. Accordingly, a homogeneous particle distribution in the effective gap 5 is guaranteed.

The receiving space 4 is filled with air here and connected to the environment via the ventilation channel 11, so that gas exchange and pressure equalization can take place.

In 3b is a detailed view of a sealing device 12 of a braking device 1 according to the invention with several sealing units 15, which include a non-contact labyrinth seal 16, a non-contact magnetic seal 20 and a sealing lip 18 that is non-contact to the sealing surface 12a of the sealing device 12.

The magnetic seal 20 is designed here as a magnetic ring, which prevents the magnetic particles 14 of the magnetorheological medium 13 from passing through the sealing device 12 with the sealing surface 12a. The labyrinth seal 16 comprises a plurality of chambers or grooves extending over the circumference, which hinder the passage of the magnetorheological particles 14 from the effective gap 5 through the sealing device 12 along the sealing surface 12a into the receiving space 4.

In addition, a sealing lip 18 is present to mechanically retain the magnetorheological particles 14. The sealing lip 18 blocks the cross section of the effective gap 5 along the height of the effective gap 5a, with a small sealing gap 17 remaining to the sealing surface 12a of the second brake component 3. The sealing lip 18 is permeable to liquid while magnetorheological particles 14 are retained and cannot pass through the sealing lip 18.

In addition, the sealing device 12 here has a magnetic particle collector 21. The particle collector 21 is here radially outside the effective gap 5, i.e. H. on the side of the sealing device 12 facing away from the sealing gap. The particle collector 21 here has a (strong) permanent magnet, through which the magnetic particles 14 are collected, which pass through the sealing device 12 from the effective gap 5 despite the sealing lip 14.

3c shows here a cross section transverse to the longitudinal direction 19 through the braking device 1. The first braking component 8 has a non-round outermost cross section 29. A minimal internal cross section 30 of the receiving space 4 of the second brake component is adapted to the outermost cross section 29 of the first brake component. The piston 10 of the first brake component 8 here has an oval outermost cross section 29. The minimum inner cross section 30 of the receiving space 4 is here adapted to the outermost cross section 29 of the first brake component 8, so that a thin gap remains between the first brake component 8 and the second brake component 3, in which the effective gap 5 is arranged. The effective gap 5 is formed here between the piston 10 and the inner wall 33 of the receiving space 4. The first brake component 8 here is thus accommodated in a rotationally fixed manner in the receiving space 4 of the second brake component 3.

The piston 10 of the first brake component 8 here has a length 27 along the longitudinal direction 19, which is larger than a maximum diameter 28 of the piston 10 of the first brake component 8. The piston 10 is here transverse to the longitudinal extent 19 at least 50% wider than it is tall .

Advantageously, the internal cross section 30 is constant over the intended travel path 31, so that the piston 10 can be displaced over an entire piston path 31.

The braking device 1 further comprises a sensor device 32, which is designed here as a Hall sensor. The sensor device 32 is used to record a measure of a position of the piston 10 of the first brake component 8 in relation to the second brake component 3.

In the exemplary embodiment, a ratio of the largest transverse dimension of the piston 10 transverse to its longitudinal extent 19 to its height 5a of the effective gap 5 is greater than 20. Consequently, the effective gap 5 represents a (only small) resistance for the magnetic field 24b, through which it (without any problems) can pass through.

In 3d an alternative embodiment of the sealing device 12 is shown. The sealing device 12 here comprises two sealing units 15 touching the opposite sealing surface 12a, a magnetic seal 20 and a sealing lip 18. The sealing lip here lies in contact with the inner wall 33 of the receiving space 4. The magnetic seal 20 here comprises two magnetic rings with electrical coils which hold a ferro-fluid 20a, shown only schematically here, in the sealing gap 17, which blocks the sealing gap 17.

In 3e an enlarged section of the effective gap 5 is shown. The active surfaces 5b of the effective gap 5 are formed here along the axial direction 5c of the effective gap 5. Alternatively or in sections, the active surfaces 5b can also have a different shape, as shown here in dashed lines, for example. B. a periodically repeating, wavy “hill and valley” profile, with a height between “hill and valley” extending over approx. 50% of the height 5a of the effective gap 5, so that a wedge effect can arise, which leads to a local concentration of the magnetorheological particles 14 leads, whereby higher forces can be transmitted. The profile here extends over the entire circumference of the piston 10s of the first brake component 8. Alternatively or additionally, the effective surface 5b on the second brake component 3 can also be designed analogously.

4 and 5 show two cuts in the retracted and extended state of the braking device 1 2 . Here, a ratio of the outer diameter 3a of the second brake component 3 to an outer diameter 9a of the piston rod 9 is less than two, so that the design is very compact. The first brake component 8 is displaceable along the travel path 31 and is preloaded into the rest position 43 by the preloading device 39, which is designed here as a spiral spring.

Connection cables can be led out through the cable bushing 40, which extends through the piston rod 9 of the first brake component 8.

The magnetically conductive second brake component 3 is here a component of the outer housing 3b, which here has a significantly lower magnetic conductivity than the magnetically conductive second brake component 3. Here the outer housing 3b comprises a further component which is made of plastic. have plastics the advantage that it can be produced easily and inexpensively compared to metallic materials, especially in mass production. The first brake component 8 also has several components here. The core 26 is magnetically conductive and is formed on the piston 10. In addition, the first brake component 8 here includes a coil holder for the coil unit 24a of the magnetic field generating device 24 and a piston rod 9. All components except the magnetically conductive core 26 are also made here from a plastic that is inexpensive and has very poor magnetic conductivity.

During operation, the piston 10 moves in the longitudinal direction 19 within the receiving space 4. The magnetorheological medium 13 in the effective gap 5 can be subjected to a magnetic field by the magnetic field generating device 24, which is designed here as a coil unit 24a, so that the magnetic particles 14 are in the effective gap 5 align and transfer forces between the second brake component 3 and the first brake component and here the piston 10. Consequently, a movement of the piston 10 relative to the second brake component 3 is braked. The magnetorheological medium 13 is present exclusively in the (thin) effective gap 5 between the piston 10 of the first brake component 8 and the second brake component 3, which is limited by the sealing devices 12.

6 and 7 show a perspective sectional view of the embodiment of the braking device 1 and a further perspective view of the braking device 1 2 .

8th shows a schematic sectional view of a further embodiment of a braking device 1. In contrast to the other embodiments, here the sealing devices 12 are accommodated on the second brake component 3, so that the effective gap 5 is stationary to the second brake component 3 and the sealing surface 12a is formed on the first brake component. Consequently, the effective gap 5 moves here with the second braking component 3 and.

9 u . 10 show schematic sectional views of a further embodiment of a braking device 1 in the retracted and extended state. The ends 37, 38 are designed here as joint sockets.

The sealing device 12 here comprises two sealing units 15, a magnetic seal 20, in particular with a ferro-fluid, not shown separately, and a mechanical contact seal, which is designed in particular as a felt ring in order to obtain an optimal seal of the effective gap 5. Furthermore, the outer housing 3b completely encloses the entire piston 10 and the piston rod 9 of the first brake component 8.

11 , 12 and 13 show further sectional and detailed views of the embodiment 9 and 10 . In 12 a section through the winding plane 25 is shown, so that the winding of the coil unit 24 in the longitudinal direction 19 can be seen.

The 14 and 15 show isometric views of the embodiment 9 and 10 in extended and retracted states.

List of reference symbols:

1

Braking device

2

console

3

second brake component, stator unit

3a

Outer diameter of 3

3b

Outer casing

4

Recording room

5

Effective gap

5a

Height of 5

5b

Effective area of 5

5c

axial gap direction of 5

6

subspace

7

subspace

8th

first brake component

9

Piston rod

9a

Outer diameter of 9

10

Pistons

11

vent channel

12

Sealing device

12a

sealing surface

13

magnetorheological medium

14

particles

14a

Filling medium

14b

receiving body

15

Sealing unit

16

Labyrinth seal

17

Sealing gap

18

sealing lip

19

Longitudinal direction, axial direction

20

Magnetic seal

20a

Ferro fluid of 20

21

Particle collector

24

Magnetic field generating device

24a

Coil unit

24b

Magnetic field

24c

Perpendicular plane to the coil

25

Winding level, coil level

26

core

27

Length of 10

28

diameter of 10

29

Cross section of 10

30

Internal cross section

31

Piston travel

32

Sensor device

33

inner wall

37

outer end

38

End

39

Preload unit

40

Cable entry

41

Angle of rotation

42

Actuation force

43

Resting position

100

Game controller, operating device

101

Control element, control button, control button, control lever, push button

102

Thumb roller

103

computer mouse

104

joystick

106

Mouse wheel

Claims (33)

Braking device (1) in particular for braking a movement of operating elements (101) such as. B. control buttons, control levers, push buttons, comprising a first brake component (8) extending along an axial longitudinal direction (19) and a second brake component (3) comprising at least partially a magnetically conductive material and a magnetic field generating device (24), the first brake component ( 8) is movably accommodated on the second brake component (3) along the axial longitudinal direction (19), characterized in that between the first brake component (8) and the second brake component (3) there is an effective gap (5) filled with a magnetorheological medium (13). ) is formed, which is sealed at the axial ends via a sealing device (12). Brake device (1). Claim 1 , wherein the magnetorheological medium (13) comprises magnetorheological particles (14) and a gas or a liquid or a fat as a filling medium (14a). Braking device (1) according to the preceding claim, wherein the effective gap (5) is filled to more than 40 percent by volume or more than 50 percent by volume or more than 60 percent by volume with magnetorheological particles (14), and wherein the effective gap (5) is filled to less than 95 percent by volume with magnetorheological particles (14). Braking device (1) according to one of the two preceding claims, wherein the magnetorheological particles (14) (each) consist predominantly of carbonyl iron powder and can have a coating against corrosion and/or a coating for better sliding. Braking device (1) according to one of the preceding claims, wherein the magnetorheological medium (13) in a receiving body (14b), such as. B. a random fiber material or a foam is accommodated, and wherein the receiving body (14b) is arranged within the effective gap (5). Braking device (1) according to one of the preceding claims, wherein at least one effective surface (5b) of the effective gap (5) is designed to be flat at least in sections in the axial direction (5c) of the effective gap (5). Braking device (1) according to one of the preceding claims, wherein the effective gap (5) has a (periodic) cross-sectional narrowing at least in sections along the axial direction (5c) of the effective gap (5) and is in particular wavy. Braking device (1) according to one of the preceding claims, wherein the sealing device (12) is accommodated on the first braking component (8) or on the second braking component (3). Braking device (1) according to one of the preceding claims, wherein the sealing device (12) comprises one or more sealing units (15), and wherein the sealing units (15) form the effective gap (5) without contact or in contact between the parts (3, 8) moving towards one another ) seal. Braking device (1) according to the preceding claim, wherein the sealing unit (15) has at least one sealing gap (17) of less than 0.075 mm or one sealing gap (17) of less than 0.01 mm to an opposite sealing surface (12a) on the first brake component ( 8) or the second brake component (3). Braking device (1) according to one of the two preceding claims, wherein the sealing unit (15) is comprised as a labyrinth seal (16). Braking device (1) according to one of the three preceding claims, wherein the sealing unit (15) comprises at least one sealing lip (18) which, in particular when installed, has a sealing gap (17) which is permeable to fluids and in particular the magnetorheological particles (14). holds back. Braking device (1) according to one of the four preceding claims, wherein the sealing unit (15) comprises at least one magnetic seal (20). Braking device (1) according to one of the five preceding claims, wherein the sealing unit (15) comprises at least one magnetic particle collector (21) which is arranged axially outside the effective gap (5) and, viewed from the effective gap (5), on the outside of the sealing device ( 12) is arranged. Braking device (1) according to one of the preceding claims, wherein the magnetic field generating device (24) comprises an electrical coil unit (24a) and a magnetically conductive core (26). Braking device (1) according to the preceding claim, wherein the magnetically conductive core (26) is formed on the first brake component (8), and wherein preferably the remaining components of the first braking component (8) have a lower magnetic conductivity than the core (26). Braking device according to one of the two preceding claims, wherein the electrical coil unit (24) is at least partially wound around the first braking component (10) in the longitudinal direction (19), so that a vertical line (24c) on the plane spanned by the coil unit (24a) transversely ( and in particular perpendicular) to a winding plane (25) spanned by the coil windings. Braking device (1) according to one of the preceding claims, wherein the magnetically conductive second brake component (3) extends between the ends of the effective gap (5) and/or the sealing devices (12) are arranged axially outside the magnetically conductive second brake component (3). Braking device (1) according to one of the preceding claims, wherein a receiving space (4) extends at least partially through the second braking component (3), in which the first braking component (8) is accommodated. Braking device (1) according to the preceding claim, wherein a minimum inner cross section (30) of the receiving space (4) is adapted to the outermost cross section (29) of the first braking component (8) at least along the effective gap (5). Braking device (1) according to one of the two preceding claims, wherein the outermost cross section (29) of the first braking component (8) and the minimum inner cross section (30) of the receiving space (4) are designed to be rotationally symmetrical or wherein (at least) the first braking component (8) has a non-round outermost cross section (29). Braking device (1) according to the preceding claim, wherein the first braking component (10) is polygonal, polygonal with rounded corners, oval or kidney-shaped or C-, U- or V-shaped transversely to the longitudinal extent (19). Braking device (1) according to one of the four preceding claims, wherein the receiving space (4) is filled with air or gas and is opened to the outside to enable gas exchange. Braking device (1) according to one of the preceding claims, comprising at least one sensor device (32) at least for detecting a measure of a position of the first braking component (8) relative to the second braking component (3) and wherein the sensor device (32) in particular has a Hall -Sensor includes. Braking device (1) according to one of the preceding claims, wherein the magnetically conductive second braking component (3) has at least one Forms part of an outer housing (3b) and wherein the at least one further housing part of the outer housing (3b) in particular has a lower magnetic conductivity than the magnetically conductive second brake component (3). Braking device (1) according to one of the preceding claims, wherein an outer end (37) of the first braking component (8) and an end (38) facing away from it of the outer housing (3b) or the second braking component (3) are each pivotable, in particular on a console (2), are recordable. Braking device (1) according to one of the preceding claims, wherein the piston (10) is preloaded into a rest position (43) via a preloading unit (39). Braking device (1) according to the preceding claim, wherein the preload unit (39) is accommodated outside the first braking component (8) and/or outside the second braking component (3). Braking device according to one of the preceding claims, wherein the first braking component (9) comprises a piston (10) and/or a piston rod (9). Braking device (1) according to the preceding claim, wherein a length (27) of the piston (10) along the longitudinal direction (19) is greater than a maximum diameter (28) of the piston (10) and / or wherein the piston (10) is transverse to the longitudinal extent (19) is at least 50% wider than high. Braking device (1) according to one of the two preceding claims, wherein a ratio of the outer diameter (3a) of the second braking component (3) to an outer diameter (9a) of the piston rod (9) is less than two. Braking device (1) according to one of the three preceding claims, wherein the receiving space (4) is divided into two different subspaces (6, 7) by the first braking component (8), and in particular the piston (10). Game controller (100) with a control element (101) or a control button (101) and with a braking device (1) for braking the movement of the control element (101), the braking device (1) being a first extending along an axial longitudinal direction (19). Brake component (8) and a second brake component (3) made of a magnetically conductive material with an elongated receiving space (4) formed therein and a magnetic field generating device (24), wherein the first braking component (8) is at least partially in the receiving space (4) along the Longitudinal direction (19) is movably accommodated and is preloaded into a rest position (43) via a preloading unit (39), characterized in that between the first braking component (8) and the second braking component (3) there is a medium filled with a magnetorheological medium (13). Effective gap (5) is formed, which is sealed at the axial ends via a sealing device (12).

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