Tactile input device

Abstract

The invention relates to a haptic input device. A haptic input device according to the present invention for providing a haptic tactile sensation to a user, the device comprising: a housing part providing an internal space; one end of the shaft part is exposed to the outside, and the other end of the shaft part is located in the inner space of the shell part; a magnetic circuit part disposed on at least one side of the shaft part and forming a magnetic circuit; an elastic part which is in contact with the other end of the shaft part and supplies a restoring force to the shaft part; and the magnetorheological fluid is filled in at least one part of the internal space.

Description

Technical Field

[0001] The present invention relates to a tactile input device, and more particularly to a tactile input device that can provide a user with a tactile sense during input through the input device. Background Art

[0002] When using various electronic and mechanical devices, there is an increasing focus on natural, easy-to-use, and informative interfaces. Computer input devices such as keyboards, mice, touchpads, styluses, and tablets provide application input and cursor control on displays.

[0003] Some interface devices can provide tactile feedback to the user. For example, a joystick, mouse, game controller, steering wheel, or other device can provide tactile touch sensations to the user based on events or interactions that occur on a display, such as in a game or other application.

[0004] In addition, in order to provide a convenient interface for users, input methods based on touch pads or voice recognition are increasing. Nevertheless, key input devices such as keyboards and mice are still the most commonly used input methods. However, the problem with key input devices is that, as feedback of the external force applied by the user, only the rebound force of an elastic mechanism such as a spring can be provided to the user. This means that they cannot provide feedback to the user in multiple ways, but can only provide the same tactile feeling. Summary of the invention

[0005] Technical issues

[0006] An object of the present invention is to provide a tactile input device that can provide a user with a tactile sense and can provide a tactile sense in various forms.

[0007] Another object of the present invention is to provide a tactile input device that can be formed in a small size and a thin thickness and can be driven with a small amount of energy.

[0008] However, these technical problems are only exemplary and are not intended to limit the scope of the present invention.

[0009] Technical Solution

[0010] The above-mentioned object of the present invention is achieved through a tactile input device, which provides a tactile sense to a user. The device includes: a shell portion, which provides an internal space; an axis portion, one end of which is exposed to the outside and the other end is located in the internal space of the shell portion; a magnetic circuit portion, which is arranged on at least one side of the axis portion and is used to form a magnetic circuit; an elastic portion, which contacts the other end of the axis portion and provides a restoring force to the axis portion; and a magnetorheological fluid, which fills at least a part of the internal space.

[0011] In addition, according to an embodiment of the present invention, a control unit may be further included, which is used to control the magnetic circuit formed by the magnetic circuit unit.

[0012] Furthermore, according to an embodiment of the present invention, the housing portion may include: a first housing disposed at an upper portion and having a shaft through hole formed therein for the shaft to pass through; and a second housing disposed at a lower portion and providing the internal space for accommodating the magnetorheological fluid.

[0013] Furthermore, according to an embodiment of the present invention, the second housing may include a receiving portion for receiving the magnetorheological fluid and the elastic portion.

[0014] Furthermore, according to an embodiment of the present invention, the pressing portion includes at least a magnetic part, the magnetic circuit portion is formed along the XY plane direction, one end and the other end of the magnetic circuit portion are supported on the accommodation portion and the second shell, and can be arranged in the internal space.

[0015] In addition, according to one embodiment of the present invention, the control unit may include a control circuit unit and a control terminal unit that transmits power to the control circuit unit, the control circuit unit is arranged in the internal space, and at least a portion of the control terminal unit is exposed to the outside of the shell unit.

[0016] Furthermore, according to an embodiment of the present invention, one end of the shaft portion may be connected to a knob.

[0017] Furthermore, according to an embodiment of the present invention, a switch portion may be arranged inside the accommodation portion, and a pressing portion for pressing the switch portion may be protrudingly formed at the other end of the shaft portion.

[0018] Furthermore, according to an embodiment of the present invention, the other end of the shaft portion may include at least a pressing portion for pressing the elastic portion, and a space, ie, a flow portion, for the magnetorheological fluid to move is formed between the pressing portions.

[0019] Furthermore, according to an embodiment of the present invention, based on the XY plane direction, magnetic lines of force may be formed starting from the first pole of the magnetic circuit portion with the pressing portion interposed therebetween to the second pole.

[0020] Furthermore, according to an embodiment of the present invention, a stopper may be formed on a side surface of the shaft portion, and the stopper limits a driving range of the shaft portion to a lower surface of the shaft through hole of the first housing.

[0021] In addition, according to an embodiment of the present invention, a yoke may be further included, which is arranged in the inner space of the second housing and provides a second inner space.

[0022] Furthermore, according to an embodiment of the present invention, the second internal space of the yoke is filled with the magnetorheological fluid, the upper portion of the second internal space is sealed by the first shell, and the lower portion of the second internal space is sealed by the second shell.

[0023] Furthermore, according to an embodiment of the present invention, the magnetic circuit portion may be arranged in a space between the yoke and the second housing.

[0024] Furthermore, according to an embodiment of the present invention, the elastic portion may be disposed on the second inner space, and the other end of the shaft portion may be inserted into the elastic portion.

[0025] Furthermore, according to an embodiment of the present invention, a stop portion may be formed on the side of the shaft portion, the stop portion having a width corresponding to the width of the second internal space, and the inner side surface of the yoke portion guides the shaft portion to be driven along the Z-axis direction in the second internal space.

[0026] In addition, according to an embodiment of the present invention, the end portion of the locking portion may further extend downward to form a side portion.

[0027] In addition, according to one embodiment of the present invention, the side portion may include at least a magnetic part, and based on the Z-axis direction, starting from the upper part of the magnetic circuit portion, the stopping portion and the side portion are sandwiched in the middle, and magnetic lines of force can be formed until the lower part of the magnetic circuit portion.

[0028] In addition, according to one embodiment of the present invention, a locking portion is formed on the side of the shaft portion, and may further include a protector portion, which is arranged lower than the locking portion and wraps around the outer periphery of the shaft portion, and is arranged on the upper part of the accommodating portion to prevent the magnetorheological fluid from leaking from the accommodating portion.

[0029] Furthermore, according to an embodiment of the present invention, the protector portion is made of an elastic material, and when a downward force is applied to one end of the shaft portion, the locking portion can press the protector portion and move the shaft portion downward.

[0030] Furthermore, according to an embodiment of the present invention, the plurality of elastic portions are horizontally arranged along an XY plane direction in the accommodation portion.

[0031] Furthermore, according to an embodiment of the present invention, the magnetic circuit portion may include: a first pole and a second pole for forming a magnetic field; a first magnetic core and a second magnetic core, the first magnetic core being inserted in the first pole and the second magnetic core being inserted in the second pole.

[0032] Furthermore, according to an embodiment of the present invention, the magnetic path portion is used to connect the outer side of the first magnetic core and the outer side of the second magnetic core, and further includes a magnetic edge portion, which is used to wrap the outer side of the first pole and the outer side of the second pole.

[0033] Furthermore, according to an embodiment of the present invention, the lower surface of the magnetic edge portion is supported on an inner step of the shell portion.

[0034] In addition, according to one embodiment of the present invention, the magnetic edge portion may include at least a magnetic part, and based on the Z-axis direction, magnetic lines of force can be formed starting from the upper part of the magnetic circuit portion, with the shaft portion and the magnetic edge portion sandwiched in the middle, until the lower part of the magnetic circuit portion.

[0035] Beneficial Effects

[0036] According to the above-described structure of the present invention, there is an effect that a tactile sensation can be provided to the user, and various forms of tactile sensation can be provided.

[0037] Furthermore, according to the present invention, there are effects that the device can be formed in a smaller size and a thinner thickness and can be driven with a smaller energy.

[0038] Obviously, these effects cannot limit the scope of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 is a schematic three-dimensional diagram of a tactile input device according to a first embodiment of the present invention.

[0040] Figure 2 is a schematic cross-sectional view of a tactile input device according to a first embodiment of the present invention.

[0041] Figure 3 2 is an exploded perspective view of a tactile input device according to a first embodiment of the present invention.

[0042] Figure 4 is a schematic diagram of a driving process of the tactile input device according to the first embodiment of the present invention.

[0043] Figure 5 FIG. 4 is a schematic diagram of the shape of magnetic lines of force between the magnetic circuit portion and the shaft portion of the tactile input device according to the first embodiment of the present invention.

[0044] Figure 6 is a schematic three-dimensional diagram of a tactile input device according to a second embodiment of the present invention.

[0045] Figure 7 is a schematic cross-sectional view of a tactile input device according to a second embodiment of the present invention.

[0046] Figure 8 is an exploded perspective schematic diagram of a tactile input device according to a second embodiment of the present invention.

[0047] Fig. 9 is a schematic diagram of a driving process of a tactile input device according to a second embodiment of the present invention.

[0048] Fig.10 is a schematic diagram of a magnetic circuit of a tactile input device according to a second embodiment of the present invention.

[0049] Fig.11 is a schematic three-dimensional diagram of a tactile input device according to a third embodiment of the present invention.

[0050] Fig.12 is a schematic cross-sectional view of a tactile input device according to a third embodiment of the present invention.

[0051] Fig.13 is an exploded perspective schematic diagram of a tactile input device according to a third embodiment of the present invention.

[0052] Fig.14 is with Fig.12 Schematic cross-sections from different sides.

[0053] Fig.15 is a schematic diagram of a driving process of a tactile input device according to a third embodiment of the present invention.

[0054] Fig.16 is a no-load test curve diagram of a tactile input device according to an experimental example of the present invention.

[0055] Fig.17 is a load test curve diagram of a tactile input device according to an experimental example of the present invention.

[0056] Description of reference numerals:

[0057] 100, 200, 300: Tactile input device

[0058] 110, 210, 310: Shell

[0059] 111, 211, 311: First shell

[0060] 115, 215, 315: Second shell

[0061] 117, 317: Accommodation

[0062] 120, 220, 320: shaft

[0063] 130, 230, 330: Magnetic circuit part

[0064] 140, 240, 340: Elastic part

[0065] 160, 260, 360: Control unit

[0066] 170, 370: Knob

[0067] 180, 280: switch part

[0068] 250: Yoke

[0069] 390: Protector

[0070] M: Magnetorheological fluid

[0071] R1, R5, R6: The inner space of the second shell

[0072] R2, R7: Accommodation space of the accommodation part

[0073] R3: Central space of magnetic circuit

[0074] R4: The second inner space of the yoke DETAILED DESCRIPTION

[0075] Reference is made to the accompanying drawings illustrated with embodiments as examples. In order to enable those skilled in the art to implement the present invention, these embodiments are specifically described below. These embodiments are fully and in detail described below so that those with common knowledge in the relevant technical field can implement the present invention. Various embodiments of the present invention should be understood to be different from each other but not mutually exclusive. For example, the specific shapes, structures and characteristics recorded herein can be implemented as other embodiments without exceeding the spirit and scope of the present invention. In addition, the position or arrangement of individual components in each disclosed embodiment should be understood to be changeable without exceeding the spirit and scope of the present invention. Therefore, the following detailed description is not intended to limit the present invention, and as long as it can be properly described, the scope of the present invention is limited only by the attached claims and all scopes equivalent thereto. Similar figure marks in the drawings refer to the same or similar functions in various aspects, and for convenience, length, area, thickness, etc. and their forms can also be exaggerated.

[0076] In order to enable those skilled in the art to easily implement the present invention, preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0077] When the tactile input device 100, 200 of the present invention performs input operation based on external force applied by the user, it can provide tactile touch. The tactile input device 100, 200 of the present invention can be applied to input devices such as keyboards, mice, buttons, etc. that perform input based on user pressure without limitation.

[0078] Figure 1 is a schematic three-dimensional diagram of a tactile input device 100 according to a first embodiment of the present invention. Figure 2 is a schematic cross-sectional view of a tactile input device 100 according to a first embodiment of the present invention. Figure 3 is an exploded perspective schematic diagram of a tactile input device 100 according to a first embodiment of the present invention.

[0079] Reference Figures 1 to 3 The tactile input device 100 according to the first embodiment of the present invention may include a housing portion 110: 111, 115, an axis portion 120, a magnetic circuit portion 130, an elastic portion 140, and a magnetorheological fluid M. It may also include a control portion 160, a knob 170, a switch portion 180, and the like.

[0080] The housing 110: 111, 115 is the outer shell of the tactile input device 100, and can provide an internal space R1 for accommodating other components. The housing 110 may include a first housing 111 arranged at the upper part and a second housing 115 arranged at the lower part. The first housing 111 and the second housing 115 can be connected to each other or plugged in to form the internal space R1. The housing 110 can be formed of materials such as SUS, PC (polycarbonate), etc.

[0081] The first housing 111 may be roughly in the shape of a hexahedron with an open bottom. The upper surface 111a of the first housing 111 may be formed with an axis through hole 112 for the shaft 120 to move up and down along the Z-axis direction. The side surface 111b of the first housing 111 has a shape that can be plugged into the second housing 115. Therefore, the internal space R1 may be in a closed state except for the axis through hole 112.

[0082] The second housing 115 may be substantially in the shape of a hexahedron with an open bottom. A control hole 116 may be formed on the side of the second housing 115, through which the control terminal 165 of the control unit 160 can pass.

[0083] In addition, the inner space R1 of the second shell 115 may be formed with a receiving portion 117. The receiving portion 117 may be a tubular or columnar shape with an open upper portion. When the lower surface of the receiving portion 117 is replaced by the inner lower surface of the second shell 115, the receiving portion 117 may be a tubular or columnar shape with both upper and lower portions open.

[0084] The accommodating portion 117 may provide an accommodating space R2 in the same direction as the extending direction (Z-axis direction) of the shaft portion 120. The shape of the accommodating space R2 of the accommodating portion 117, i.e., the inner diameter, may correspond to the outer diameter of the shaft portion 120. Therefore, when the shaft portion 120 is operated along the Z-axis direction, the axis of the shaft portion 120 does not deviate from the accommodating space R2 and operates therein. Preferably, the height of the accommodating space R2 is less than the length of the portion of the shaft portion 120 arranged on the internal space R1 of the housing portion 110 in the Z-axis direction.

[0085] The magnetorheological fluid M may be filled in the accommodation space R2 of the accommodation portion 117. The magnetorheological fluid M contains magnetic particles and a fluid medium such as oil and water in which the magnetic particles are dispersed. Preferably, the magnetorheological fluid M is preferably arranged in the accommodation space R2 in a state sealed by the shaft portion 120. In addition, the accommodation space R2 of the accommodation portion 117 may be arranged with an elastic portion 140. In addition, optionally, the accommodation space R2 of the accommodation portion 117 may be further arranged with a switch portion 180.

[0086] The shaft portion 120 may be configured to directly transmit a tactile sensation as a rebound force to an applied external force to the user. The shaft portion 120 may be formed to extend substantially along the Z-axis direction. One end (upper end) of the shaft portion 120 is exposed to the outside of the housing portion 110, and the other end (lower end) may be located in the internal space R1 of the housing portion 110. One end (upper end) of the shaft portion 120 may be exposed to the outside of the housing portion 110 through the shaft through hole 112. Preferably, the planar cross-sectional shape of the shaft through hole 112 corresponds to the planar cross-sectional shape of the shaft portion 120, and the shaft portion 120 passes through the shaft through hole 112 from bottom to top with the Z-axis direction as a reference, and the internal space R1 of the housing portion 110 is closed. In order to achieve a completely closed state, a seal (not shown) may be further provided around the shaft through hole 112 and the shaft portion 120.

[0087] Optionally, a knob 170 may be connected to one end of the shaft 120. The function of the knob 170 is to expand the contact surface between the user and the tactile input device 100 and better transmit the tactile sense to the user. A connecting hole 173 is formed on the knob 170 to communicate with the fastening hole 122 formed on the upper surface 121 of the shaft 120. The shaft 120 and the knob 170 can be fixed by installing a fastener 175 such as a screw or a bolt in the connecting hole 173 and the fastening hole 122.

[0088] A stopper 124 may be formed on the side of the shaft 120. The stopper 124 may be formed protruding toward the side direction of the shaft 120 (the direction in which the XY plane is formed). The stopper 124 may limit the upper limit of the driving range of the shaft 120 to prevent the shaft 120 from passing through the shaft through hole 112 and deviating to the outside. Preferably, the stopper 124 protrudes toward the side direction of the shaft 120 to avoid entering the accommodation space R2. Preferably, the stopper 124 is formed on both side surfaces of the shaft 120 and contacts the lower surface of the shaft through hole 112 [or, the inner side of the upper surface 111a of the first shell 111], but as long as the shaft 120 is stuck in the lower surface of the shaft through hole 112 [or, the inner side of the upper surface 111a of the first shell 111], the stopper 124 may also be formed only on one side of the shaft 120.

[0089] The other end (lower end) of the shaft portion 120 may include at least a pressing portion 125 for pressing the elastic portion 140. In addition, a space, i.e., a flow portion S1, for moving the magnetorheological fluid M may be formed at the other end of the shaft portion 120. That is, the other end of the shaft portion 120 except for the space formed with the flow portion S1 may be provided as the pressing portion 125.

[0090] In order to press the elastic part 140, the pressing part 125 may correspond to the edge of the elastic part 140. For example, if the elastic part 140 is in the shape of a spring, in order to press the edge portion of the spring, it may at least have a shape corresponding to the edge. As an embodiment, although the plane cross-section (XY plane) shape of the pressing part 125 is illustrated in the present specification as an H shape, it is not limited thereto, as long as the flow part S1 can be formed and the elastic part 140 can be pressed.

[0091] In addition, the extrusion portion 125 can essentially be a portion that is subjected to shear force, resistance, torque, stiffness change, etc. during the driving process in the Z-axis direction when the magnetic flux of the magnetorheological fluid M is formed. In order to better form the magnetic flux, the shaft 120 or the extrusion portion 125 may include a magnetic portion. Including a magnetic portion means that it is entirely composed of magnetic material or only a part is a magnetic material. The magnetic material may include iron, nickel, cobalt, ferrite (Fe3O4) or their alloys and metals that are nitrided, oxidized, carburized, or silicided. According to one embodiment, the shaft 120 may be formed of materials such as cold-rolled steel sheet (SPCC).

[0092] The other end (lower end) of the shaft portion 120 may be further formed with a pressing portion 127. The pressing portion 127 is configured so that the switch portion 180 arranged on the bottom surface of the accommodating portion 117 can be pressed when the pressing portion 125 presses the elastic portion 140, but is not in direct contact with the elastic portion 140. The pressing portion 127 is located on an XY plane region different from the pressing portion 125 and is formed to protrude downward. From another point of view, when the elastic portion 140 is a spring with a hollow interior, the pressing portion 127 may be formed to protrude toward the hollow space inside the elastic portion 140.

[0093] The magnetic circuit portion 130 may form a magnetic circuit for changing the behavior of the magnetorheological fluid M. The magnetic circuit portion 130 may generate a magnetic circuit, i.e., a magnetic field, using a control signal from the control portion 160 or controlling electric power. The magnetic circuit portion 130 may use a means for controlling the direction of the magnetic field. Preferably, the magnetic circuit portion 130 includes a solenoid coil, and changes the direction of the magnetic field by controlling the direction of the current flowing therein.

[0094] In the internal space R1 of the housing 110, the magnetic circuit portion 130 may be arranged on at least one side of the shaft portion 120. In order to form magnetic lines of force along the XY plane direction on the side of the shaft portion 120, the magnetic circuit portion 130 is preferably formed along the XY plane direction. Although this specification exemplifies that the magnetic circuit portion 130 is arranged on the left and right sides of the shaft portion 120, the magnetic circuit portion 130 may be arranged only on one side of the shaft portion 120. Alternatively, the magnetic circuit portion 130 may also be arranged on one side other than the left and right sides of the shaft portion 120.

[0095] One end 137 of the magnetic circuit portion 130 may be supported on the accommodating portion 117, and the other end 135 may be supported on the second housing 115. Specifically, one end 137 of the magnetic circuit portion 130 may be inserted into and supported in a supporting hole 119 formed on a side wall of the accommodating portion 117. The other end 135 may be supported on a predetermined step formed on the inner side wall of the second housing 115 or attached to and supported on the inner side wall of the second housing 115.

[0096] The first pole 131 and the second pole 132 of the magnetic circuit portion 130 may be provided as magnets. For example, the first pole 131 and the second pole 132 may include a coil and may include a solenoid electromagnet. Alternatively, the magnetic circuit portion 130 may include a permanent magnet. The first pole 131 and the second pole 132 may be arranged parallel to the horizontal plane direction (XY plane direction) and spaced apart from each other. In order to form a closed loop of magnetic lines of force MF [refer to Figure 5 ], the first pole 131 and the second pole 132 preferably have different polarities. For example, the first pole 131 may be an N pole, and the second pole 132 may be an S pole.

[0097] The other end 135 of the magnetic circuit portion 130 is electrically connected to the control portion 160 so as to receive power. The other end 135 of the magnetic circuit portion 130 can be provided as a core of the first pole 131 and the second pole 132. One end 137 of the magnetic circuit portion 130 is inserted into the support hole 119 of the accommodating portion 117 so that the magnetic circuit portion 130 is arranged in the horizontal plane direction, and the support hole 119 is blocked to achieve the sealing of the magnetorheological fluid M inside the accommodating portion 117.

[0098] In addition, the end 137 of the magnetic circuit portion 130 may include a magnetic portion, similar to the extrusion portion 125. Thus, the magnetic lines of force MF may be better formed along the first pole 131, the second pole 132, the end 137, and the shaft portion 120 [or the extrusion portion 125].

[0099] The elastic part 140 may be disposed in the accommodation space R2 of the accommodation part 117. The elastic part 140 may contact and support the lower part of the shaft part 120 [or the pressing part 125]. When the user applies an external force P [refer to Figure 4], the elastic part 140 provides a tactile sensation based on resistance, and if the external force P applied by the user is released, the elastic part 140 provides a restoring force to return the shaft part 120 to the upper position. The elastic part 140 is preferably provided in the form of a coil spring, and may also be a well-known rubber dome or other elastic mechanism. As an example, the material of the elastic part 140 may include a piano wire such as SWP.

[0100] The control unit 160 can control the magnetic circuit formed by the magnetic circuit unit 130. The control unit 160 may substantially include a control circuit unit 161 and a control terminal unit 165. The control circuit unit 161 transmits a control signal or control power to the magnetic circuit unit 130, and the control terminal unit 165 receives power from an external power supply means (not shown) and transmits it to the control circuit unit 161. The control circuit unit 161 may be arranged in the internal space R1 of the housing 110. The control terminal unit 165 extends from the control circuit unit 161 and is exposed to the outside of the housing 110 through the control hole 116.

[0101] The switch portion 180 may be disposed in the accommodation portion 117. As the switch portion 180 is pressed by the pressing portion 127 of the shaft portion 120, the switch portion 180 transmits an input signal to a device connected to the tactile input device 100. The signal of the switch portion 180 may also be transmitted to the control portion 160. The control portion 160 may further consider the input signal of the switch portion 180 and control the formation of the magnetic circuit of the magnetic circuit portion 130.

[0102] Figure 4 is a schematic diagram of the driving process of the tactile input device 100 according to the first embodiment of the present invention. Figure 5 1 is a schematic diagram of the shape of magnetic lines of force MF between the magnetic circuit portion 130 and the shaft portion 120 in the tactile input device 100 according to the first embodiment of the present invention.

[0103] Reference Figure 4 and Figure 5 , the magnetic circuit portion 130 can be formed in the horizontal plane (XY plane) direction, with the coils of the first pole 131 and the second pole 132 being wound with opposite polarities. Thus, the magnetic circuit is also formed in the horizontal plane direction and corresponds to the formation direction of the magnetic circuit portion 130. In addition, the extrusion portion 125 can also be formed of a magnetic material, which helps the magnetic lines of force MF to be formed in the horizontal plane direction. Figure 5 As shown, the magnetic lines of force MF may form a magnetic loop along the first pole 131 - the pressing portion 125 - the second pole 132 in sequence.

[0104] like Figure 4As shown, when the user applies an external force P to the shaft 120 [or the knob 170] and presses it, the shaft 120 squeezes the elastic part 140. If no magnetic field is applied and no magnetic field lines MF are formed, the elastic part 140 is squeezed (140->140') and provides a rebound force corresponding to the inherent elastic force to the user.

[0105] If a magnetic field is applied and magnetic lines of force MF are formed, the magnetic particles in the magnetorheological fluid M can form a magnetic chain (M->M') along the direction of the magnetic lines of force MF. The magnetic chain can be formed roughly from the inner wall of the container 117 containing the magnetorheological fluid M to one side of the shaft 120. Alternatively, the magnetic chain can be formed from the flow portion S1 of the shaft 120 to one side of the shaft 120 [or one side of the extrusion portion 125], the inner wall of the container 117. The magnetic chain is formed based on the magnetic lines of force MF, so that resistance can be applied to the driving of the shaft 120 in the Z-axis direction. That is, the magnetic chain can be formed in the horizontal plane (XY plane) perpendicular to the driving direction of the shaft 120, and resistance can be applied in the Z-axis driving direction of the shaft 120. The resistance applied during the driving of the shaft 120 along the Z-axis can vary according to the strength of the magnetic field, the binding force of the magnetic chain, etc. The user can feel the tactile touch according to the shape, mode, strength, etc. of the resistance.

[0106] When the external force P applied by the user is released and the magnetic field of the magnetic circuit portion 130 is also released, the shaft portion 120 may be restored upward due to the restoring force of the elastic portion 140 .

[0107] Figure 6 is a schematic three-dimensional diagram of a tactile input device 200 according to a second embodiment of the present invention. Figure 7 is a schematic cross-sectional view of a tactile input device 200 according to a second embodiment of the present invention. Figure 8 FIG. 2 is an exploded perspective view of a tactile input device 200 according to a second embodiment of the present invention. Figures 1 to 5 The components that are different from the first embodiment are replaced by the same components as described above. The reference numerals of the same components in the first embodiment and the second embodiment are represented by 100 series and 200 series, and correspond to each other. In the following, unless otherwise specified, Figures 6 to 8 The components in can be Figures 1 to 5 Replaced by the components described in .

[0108] Reference Figures 6 to 8 The tactile input device 200 according to the second embodiment of the present invention may include a housing portion 210: 211, 215, a shaft portion 220, a magnetic circuit portion 230, an elastic portion 240, a yoke portion 250, and a magnetorheological fluid M. Here, a control portion 260, a switch portion 280, etc. may also be included. The size of the tactile input device 200 of the second embodiment is smaller than that of the tactile input device 100 of the first embodiment and the structure is simpler.

[0109] The housing parts 210, 211, 215 are the outer shells of the tactile input device 200, and can provide an internal space R5 for accommodating other components. The first housing 211 can be a generally flat plate having an axial through hole 212. The second housing 215 can be generally in the shape of a hexahedron with an open top. The side of the second housing 215 can be formed with a channel, i.e., a connecting hole 216, which electrically connects the control unit 260 to the magnetic circuit unit 230.

[0110] The magnetic circuit portion 230 may be disposed in the inner space R5 of the second housing portion 215. The magnetic circuit portion 230 may be in a wrapped form and correspond to the inner side surface of the second housing portion 215. The magnetic circuit portion 230 may be cylindrical and have a central space R3. The magnetic circuit portion 230 may be provided by a coil wound along the inner side surface of the second housing portion 215.

[0111] The tactile input device 200 of the second embodiment may further include a yoke 250. The yoke 250 may be arranged in the internal space R5 of the second shell 215. More specifically, the yoke 250 may be arranged in the central space R3 of the magnetic circuit portion 230. The yoke 250 may provide a second internal space R4. The yoke 250 may be in an enclosed form and correspond to the inner side surface of the magnetic circuit portion 230. The yoke 250 may be tubular or columnar and have a central space R4. The yoke 250 may be formed of the same material as the shell portion 210, such as SUS, PC (polycarbonate), etc.

[0112] The yoke 250 may provide a second internal space R4 in the same direction as the extension direction (Z-axis direction) of the shaft 220. The shape, i.e., the inner diameter, of the second internal space R4 of the yoke 250 may correspond to the outer diameter of the shaft 220. Therefore, there is an advantage that when the shaft 220 is operated along the Z-axis direction, the operation of the shaft 220 does not deviate from the second internal space R4.

[0113] The second internal space R4 may be filled with the magnetorheological fluid M. In order to seal the magnetorheological fluid M, the height of the second internal space R4 may correspond to the height of the second housing 215. The internal space R5 of the second housing 215 may be divided by the yoke 250 into a space for arranging the magnetic circuit portion 230 and a second internal space R4 for arranging the magnetorheological fluid M. Therefore, there is an advantage that the magnetic particles of the magnetorheological fluid M can be prevented from directly adhering to the magnetic circuit portion 230.

[0114] After the magnetic circuit part 230 and the yoke part 250 are arranged in sequence in the internal space R5 of the second shell 215, and the magnetorheological fluid M, the elastic part 240, and the switch part 280 are arranged in the second internal space R4 of the yoke part 250, the shaft part 220 is inserted into the elastic part 240. Then, the first shell 211 can be plugged in with the second shell 215 to seal the internal space R5 and the upper part of the second internal space R4. The upper part 211a of the first shell 211 contacts the upper part of the yoke part 250 and the upper edge of the second shell 215, so that the space for arranging the magnetic circuit part 230 can be sealed. In addition, the lower part 211b of the first shell 211 contacts the upper part of the yoke part 250, so that the second internal space R4 can be sealed.

[0115] The upper end portion 221 of the shaft portion 220 may be exposed to the outside of the housing portion 210 through the shaft through hole 212, and the lower end portion 225 may be inserted into the elastic portion 240. In addition, a stopper 223 may be formed on the side of the shaft portion 220. The stopper 223 may be formed protrudingly along the side direction (XY plane formation direction) of the shaft portion 220. The stopper 223 is used to limit the upper limit of the driving range of the shaft portion 220, and can prevent the shaft portion 220 from passing through the shaft through hole 212 and deviating to the outside. Preferably, the stopper 223 may protrude toward the side direction of the shaft portion 220 to prevent it from entering the inside of the elastic portion 240. The locking portion 223 is preferably formed on both side surfaces of the shaft portion 220 and in contact with the lower surface of the shaft through hole 212 [or, the inner side of the lower portion 211b of the first shell 211]. However, as long as the shaft portion 220 is locked in the lower surface of the shaft through hole 212 [or, the inner side of the lower portion 211b of the first shell 211], the locking portion 223 may also be formed only on one side surface of the shaft portion 220.

[0116] The width of the stopper 223 may correspond to the width of the second internal space R4. Therefore, the shaft 220 may be smoothly driven in the second internal space R4 in a non-tilted state along the Z-axis direction. Side portions 227 are further extended downwardly at both ends of the stopper 223. The side portions 227 may be arranged on the outside of the elastic portion 240, and the lower end portion 225 may be inserted into the elastic portion 240. Thus, the elastic portion 240 may be pressed by the lower surface of the stopper 223. That is, in the lower surface of the stopper 223, except for the extended portion of the lower end portion 225 and the side portion 227, the remaining portion may contact the elastic portion 240. The inner side surface of the yoke 250 may guide the shaft 220 to be driven in the second internal space R4 along the Z-axis direction without deviating in the XY plane direction.

[0117] The lower end portion 225 and the side portion 227 of the shaft portion 220 may be substantially portions that are subjected to shear force, resistance, torque, rigidity change, etc. during driving in the Z-axis direction when forming the magnetic flux of the magnetorheological fluid M. In order to better form the magnetic flux, at least one of the lower end portion 225 and the side portion 227 of the shaft portion 220 may include a magnetic portion.

[0118] The control unit 260 can control the magnetic circuit formed by the magnetic circuit unit 230 . The control unit 260 can be disposed on the outer side of the housing 210 and electrically connected to the magnetic circuit unit 230 through the communication hole 216 .

[0119] Optionally, a pressing portion (not shown) for pressing the switch portion 280 may be formed on the lower end portion 225 of the shaft portion 220 .

[0120] Fig. 9 is a schematic diagram of the driving process of the tactile input device 200 according to the second embodiment of the present invention. Fig.10 is a schematic diagram of a magnetic circuit of a tactile input device 200 according to a second embodiment of the present invention.

[0121] Reference Fig. 9 and Fig.10 , the magnetic circuit portion 230 can be formed in a vertical (Z-axis) direction along the side of the second shell 215. The magnetic circuit is generally formed from bottom to top to penetrate the central space R3 of the magnetic circuit portion 230. In addition, the stopper portion 223 and the side portion 227 of the shaft portion 220 can also be formed of magnetic materials, thereby facilitating the formation of the magnetic lines of force MF in a vertical (Z-axis) direction. Fig.10 As shown, the magnetic lines of force MF may form a magnetic loop along the upper portion of the magnetic circuit portion 230 - the stop portion 223 , and the side portion 227 - the lower portion of the magnetic circuit portion 230 .

[0122] like Fig. 9 As shown, if the user applies external force P to press the upper end 221 of the shaft 220, the shaft 220 squeezes the elastic part 240. When no magnetic field is applied and no magnetic field lines MF are formed, the elastic part 240 squeezes (240->240') and provides the user with a rebound force corresponding to the inherent elastic force.

[0123] When a magnetic field is applied and magnetic lines of force MF are formed, the magnetic particles in the magnetorheological fluid M can form a magnetic chain (M->M') along the direction of the magnetic lines of force MF. The magnetic chain can be formed roughly from the inner wall of the second internal space R4 [or the yoke 250] containing the magnetorheological fluid M to one side of the shaft 220. Alternatively, the magnetic chain can be formed from the side of the lower end 225 of the shaft 220 to one side of the shaft 227. The magnetic chain is formed based on the magnetic lines of force MF, so that resistance can be applied to the driving of the shaft 220 in the Z-axis direction. That is, the magnetic chain is formed in the horizontal plane (XY plane) perpendicular to the driving direction of the shaft 220, and resistance can be applied in the Z-axis driving direction of the shaft 220. The resistance applied during the driving of the shaft 220 along the Z-axis can vary according to the strength of the magnetic field, the binding force of the magnetic chain, etc. The user can feel the tactile touch according to the shape, mode, strength, etc. of the resistance.

[0124] When the external force P of the user is released and the magnetic field of the magnetic circuit portion 230 is also released, the shaft portion 220 may be restored upward by the restoring force of the elastic portion 240 .

[0125] Fig.11 is a schematic three-dimensional diagram of a tactile input device 300 according to a third embodiment of the present invention. Fig.12 is a schematic cross-sectional view of a tactile input device 300 according to a third embodiment of the present invention. Fig.13 is an exploded perspective schematic diagram of a tactile input device 300 according to a third embodiment of the present invention. Fig.14 is with Fig.12 The following is a cross-sectional diagram of the different sides. Figures 1 to 5 The components that are different from the first embodiment are replaced by the same components as described above. The reference numerals of the same components in the first embodiment and the third embodiment are represented by 100 series and 300 series, and correspond to each other. In the following, unless otherwise specified, Figures 11 to 14 The components in can be Figures 1 to 5 Replaced by the components described in .

[0126] Reference Figures 11 to 14 The tactile input device 300 according to the third embodiment of the present invention may include a housing portion 310: 311, 315, a shaft portion 320, a magnetic circuit portion 330, an elastic portion 340, and a magnetorheological fluid M. Here, a control portion 360, a knob 370, etc. may also be included. The tactile input device 300 of the third embodiment minimizes the size of the tactile input device 100 of the first embodiment and maximizes the driving / resistance torque.

[0127] The housing parts 310, 311, 315 are the outer shells of the tactile input device 300, and may include an internal space R6 for accommodating other components. The first housing 311 may be a hexahedron having an axial through hole 312 and being generally open at the bottom. The second housing 315 may be generally a hexahedron having an open top. The side of the second housing 315 may be formed with a channel, i.e., a connecting hole 316, which electrically connects the control unit 360 to the magnetic circuit unit 330.

[0128] In addition, the inner space R6 of the second shell 315 may be formed with a receiving portion 317. The receiving portion 317 may be formed in a tubular or columnar shape with an upper portion open. When the lower surface of the receiving portion 317 is replaced by the inner lower surface of the second shell 315, the receiving portion 317 may be formed in a tubular or columnar shape with both upper and lower portions open.

[0129] The accommodating portion 317 may provide an accommodating space R7 in the same direction as the extending direction (Z-axis direction) of the shaft portion 320. The shape of the accommodating space R7 of the accommodating portion 317, i.e., the inner diameter, may correspond to the outer diameter of the shaft portion 320. Therefore, when the shaft portion 320 is operated in the Z-axis direction, the axis of the shaft portion 320 does not deviate from the accommodating space R7 and operates therein. Preferably, the height of the accommodating space R7 is less than the length of the portion of the shaft portion 320 arranged on the internal space R6 of the housing portion 310 in the Z-axis direction.

[0130] The magnetorheological fluid M may be filled in the accommodation space R7 of the accommodation portion 317. In addition, the accommodation space R7 of the accommodation portion 317 is provided with an elastic portion 340. In addition, optionally, the accommodation space R7 of the accommodation portion 317 may further be provided with a switch portion (not shown).

[0131] The shaft portion 320 is substantially the same as the shaft portion 120 of the first embodiment. On this basis, a protector portion 390 for wrapping the outer periphery of the shaft portion 320 may be further arranged. The protector portion 390 has an insertion hole 392, and the shaft portion 320 is inserted into the insertion hole 392. The protector portion 390 may be made of an elastic material. The protector portion 390 may be made of an elastic material such as silicone, silicone rubber, rubber, polymer, etc., preferably, made of silicone material. The protector portion 390 may have at least wrinkles 391. The vertical length of the protector portion 390 is variable based on its own elastic material properties and the shape of the wrinkles 391. If the protector portion 390 extends in the Z-axis direction, the wrinkles 391 are expanded, and if compressed, more wrinkles 391 are generated.

[0132] The protector portion 390 may be disposed below the stopper portion 324 formed on the side of the shaft portion 320. In addition, the protector portion 390 may be disposed on the upper portion of the accommodating portion 317. Thus, the magnetorheological fluid M filled in the accommodating space R7 of the accommodating portion 317 may be prevented from leaking to the outside of the accommodating portion 317.

[0133] In order to effectively prevent leakage of the magnetorheological fluid M, the outer peripheral shape of the protector portion 390 preferably corresponds to the outer peripheral shape of the accommodation portion 317. The central portion corresponding to the accommodation portion 317 may be formed in an open tubular or columnar shape.

[0134] The shaft portion 320 may be formed with a space, ie, a flow portion S2 , for movement of the magnetorheological fluid M. That is, in addition to the space formed with the flow portion S2 , the other end portion of the shaft portion 320 may be used to press the elastic portion 340 .

[0135] The magnetic circuit portion 330 may be provided in the form of enclosing the shaft portion 320 in the internal space R6 of the housing portion 310. Although the present specification exemplifies that the first pole 331 and the second pole 332 are arranged at intervals on the left and right sides of the shaft portion 320, the first pole 331 or the second pole 332 may be arranged only on one side of the shaft portion 320. Alternatively, a third pole may be further arranged on the other side of the shaft portion 320 other than the left and right sides.

[0136] The first pole 331 and the second pole 332 include a coil and may include a solenoid electromagnet. In order to form magnetic lines of force MF in all vertical directions of the internal space R6 [refer to Fig.15 ], the first pole 331 and the second pole 332 can be in the form of coils wound so as to be arranged over the entire vertical length of the internal space R6.

[0137] The first pole 331 and the second pole 332 can be inserted into the first magnetic core 335 and the second magnetic core 336, respectively. In addition, the first magnetic core 335 and the second magnetic core 336 can be electrically / magnetically connected by sandwiching a magnetic edge portion 337. The magnetic edge portion 337 can constitute the outer peripheral portion of the magnetic circuit portion 330. The magnetic edge portion 337 can be provided in the following structure, that is, while wrapping the outer side of the first pole 331 and the outer side of the second pole 332, it connects the outer side of the first magnetic core 335 and the outer side of the second magnetic core 336.

[0138] The magnetic edge portion 337 may be formed horizontally with respect to the XY plane direction. The lower surface of the magnetic edge portion 337 may be supported on the inner step 319 of the second housing portion 315. When the magnetic edge portion 337 is supported on the inner step 319, the magnetic circuit portion 330 may be stably arranged in the inner space R6.

[0139] In addition, like the shaft 320, the magnetic edge portion 337 may include at least a magnetic portion. The first magnetic core 335 and the second magnetic core 336 also include at least a magnetic portion. Thus, in addition to the vertical direction (Z-axis direction) of the internal space R6, the magnetic lines of force MF can also be formed along the formation direction (XY plane direction) of the magnetic edge portion 337. The magnetic lines of force MF are formed in a wider range in the internal space R6, so when the shaft 320 is driven along the Z-axis direction, it will be subjected to greater shear force, resistance, torque, rigidity change, etc.

[0140] The elastic part 340 may be arranged in the accommodation space R7 of the accommodation part 317. One or more elastic parts 340 may be arranged in the accommodation space R7. As an example, when the elastic part 340 is a cylindrical spring and the width of the accommodation space R7 in the X-axis or Y-axis direction is greater than the diameter of the elastic part 340, the elastic part 340 may shake unstably in the accommodation space R7. At this time, the phenomenon of unstable shaking may be improved by arranging a plurality of elastic parts 340 in the accommodation space R7, and the plurality of elastic parts 340 are arranged horizontally in the XY plane direction. Fig.14 By supporting the lower left area and the lower right area of ​​the shaft 320 with two elastic parts 340a and 340b respectively, the shaft 320 can be prevented from tilting or shaking toward one of the areas when driven along the Z-axis direction. In addition, in order to arrange the elastic part 340 more stably in the accommodation space R7, the elastic part 340 can be inserted into or connected and fixed to the lower part of the accommodation part 317. In addition, the upper part of the elastic part 340 can also be inserted into or connected and fixed to the lower part of the shaft 320.

[0141] Fig.15 is a schematic diagram of the driving process of the tactile input device 300 according to the third embodiment of the present invention.

[0142] Reference Fig.15 , the first pole 331 and the second pole 332 of the magnetic circuit portion 330 can be formed in the internal space R6 along the vertical direction (Z-axis direction). As a result, the magnetic circuit [or, the magnetic lines of force MF] can also be formed in the vertical direction and correspond to the formation direction of the magnetic circuit portion 330. In addition, the shaft 320 and the magnetic edge portion 337 can also be formed of magnetic materials, which also helps to form the magnetic lines of force MF along the horizontal plane direction. As an example, Fig.15 As shown in the right side figure of , the magnetic lines of force MF may form a magnetic loop along the upper portion of the first pole 331 / the second pole 332 - the shaft portion 320 and the magnetic edge portion 337 - the lower portion of the first pole 331 / the second pole 332 .

[0143] As an example, when the first pole 331 and the second pole 332 have opposite polarities, the magnetic lines MF may also form a magnetic loop along the upper portion of the first pole 331 - the upper portion of the second pole 332 - the lower portion of the second pole 332 - the lower portion of the first pole 331 .

[0144] like Fig.15 As shown, if the user applies external force P to the shaft 320 [or the knob 370] to press, the shaft 320 squeezes the elastic part 340. If no magnetic field is applied and no magnetic field lines MF are formed, the elastic part 340 is squeezed (340->340') and provides a rebound force corresponding to the inherent elastic force to the user.

[0145] When a magnetic field is applied and magnetic lines of force MF are formed, the magnetic particles in the magnetorheological fluid M can form a magnetic chain (M->M') along the direction of the magnetic lines of force MF. The magnetic chain can be formed from the inner wall of the container 317 containing the magnetorheological fluid M to one side of the shaft 320. Alternatively, the magnetic chain can be formed from the flow portion S2 of the shaft 320 to one side of the shaft 320 and the inner wall of the container 317. The magnetic chain is formed based on the magnetic lines of force MF, so that resistance can be applied to the drive in the Z-axis direction of the shaft 320. That is, the magnetic chain can be formed in a direction horizontal to the driving direction of the shaft 320 (Z-axis direction) and in a horizontal plane (XY plane) perpendicular to the driving direction of the shaft 320, and resistance can be applied in the Z-axis driving direction of the shaft 320. The resistance applied during the driving of the shaft 320 along the Z-axis can vary according to the strength of the magnetic field, the binding force of the magnetic chain, etc. The user can feel the tactile touch according to the shape, pattern, and strength of the resistance.

[0146] When the external force P applied by the user is released and the magnetic field of the magnetic circuit portion 330 is also released, the shaft portion 320 may be restored upward due to the restoring force of the elastic portion 340 .

[0147] In addition, when the user applies an external force P, the stopper 324 of the shaft 320 can squeeze (390->390') the protector 390. The squeezed protector 390' still maintains the outer periphery of the shaft 320, thereby preventing the magnetorheological fluid M from leaking to the outside of the accommodating portion 317. If the external force P applied by the user is released, the shaft 320 is reset upward based on the restoring force of the elastic portion 340, and the wrinkles 391 of the protector 390' are re-expanded and extended upward (390'->390). As the protector 390 extends, the force pushing the stopper 324 upward increases, so the recovery speed is faster than when only the elastic portion 340 is used.

[0148] Fig.16 is a no-load test curve diagram of a tactile input device according to an experimental example of the present invention.

[0149] Fig.17 is a load test curve diagram of a tactile input device according to an experimental example of the present invention. Fig.16 is the state where no magnetic field is applied. Fig.17 The load magnitude at each time when a magnetic field is applied to the magnetic circuit portion. The tactile input device 300 was tested, and the drive stroke in the Z-axis direction of the shaft portion 320 was set to 5.0 mm and driven repeatedly three times. A load pattern of 2 Hz and 5 V was applied to the magnetic circuit portion 330.

[0150] Reference Fig.16 , when no magnetic field is applied, resistance based on the elastic part 340 is presented. Specifically, a resistance of about 2.9N is presented. Fig.17, when a magnetic field is applied, Fig.16 On the basis of the resistance, as the magnetorheological fluid M forms a magnetic flux, the shaft 320 can further withstand shear force, resistance, torque, rigidity change, etc. during the driving process along the Z-axis direction. Fig.17 The maximum resistance is about 4.51N, which is Fig.16 The difference of 2.9N is about 1.61N, which can be confirmed to be the value of the haptic force that is additionally borne as the magnetorheological fluid M forms a magnetic flux. Fig.17 It can be confirmed that the user can receive a tactile force corresponding to the vibration pattern while pressing the shaft 320. According to the magnetic field generated in the magnetic circuit part 330, various patterns of tactile force can be provided.

[0151] As described above, the present invention has the effect of providing a tactile sensation to a user in a process of inputting through an input device and providing various tactile sensation forms.

[0152] In addition, the present invention has the effect of realizing a tactile input device 100, 200 of small size, thin thickness and simple structure. According to one embodiment, the tactile input device 100 of the present invention can be made into a horizontal x vertical x thickness of about 20mm x 20mm x 13.5mm except the knob 170, and can be made into about 20mm x 20mm x 22mm including the knob 170. The driving stroke range of the shaft portion 120 pressing down can be about 2.5mm.

[0153] In addition, according to one embodiment, the tactile input device 200 of the present invention can be made into about 8mm×8mm×4.8mm except for the knob having a height of about 1.5mm, and the tactile input device 200 of the present invention can be made into about 8mm×8mm×6mm when including the knob. The driving stroke of the shaft portion 220 pressed downward can be about 1.5mm.

[0154] In addition, according to one embodiment, the tactile input device 300 of the present invention can be made into a horizontal x vertical x thickness of about 38mm x 40mm x 40mm, except for the knob 370, and can be made into about 38mm x 40mm x 47.5mm including the knob 370. The driving stroke range of the shaft portion 320 pressing down can be about 5mm.

[0155] In addition, the present invention controls the resistance by forming a magnetic flux of the rheological fluid M based on the elastic force and restoring force of the elastic parts 140 , 240 , and 340 , thereby providing a tactile sensation with less energy.

[0156] As described above, the present invention lists preferred embodiments for illustration and description, but the present invention is not limited to the above embodiments, and those skilled in the art can make various modifications and changes without departing from the spirit of the present invention. Such modifications and changes all belong to the scope of the present invention and the appended claims.

Claims

1. A tactile input device for providing a tactile sense to a user, comprising: a housing portion providing an interior space; A shaft portion, one end of which is exposed to the outside and the other end of which is located in the internal space of the shell portion; a magnetic circuit portion, which is arranged on at least one side of the shaft portion and is used to form a magnetic circuit; an elastic portion that contacts the other end of the shaft portion and provides a restoring force to the shaft portion; A magnetorheological fluid fills at least a portion of the inner space.

2. The tactile input device according to claim 1, wherein: The invention further includes a control unit for controlling the magnetic circuit formed by the magnetic circuit unit.

3. The tactile input device according to claim 1, wherein: The housing portion comprises: A first housing disposed at the upper portion and formed with a shaft through-hole through which the shaft passes; and The second housing is arranged at the lower portion and provides the inner space for accommodating the magnetorheological fluid.

4. The tactile input device according to claim 3, wherein: The second housing includes a receiving portion for receiving the magnetorheological fluid and the elastic portion.

5. The tactile input device according to claim 4, wherein: The magnetic circuit portion is formed along the XY plane direction, one end and the other end of the magnetic circuit portion are supported by the accommodation portion and the second housing, and is arranged in the internal space.

6. The tactile input device according to claim 1, wherein: The control unit includes a control circuit unit and a control terminal unit for transmitting power to the control circuit unit. The control circuit portion is arranged in the internal space, and at least a portion of the control terminal portion is exposed to the outside of the housing portion.

7. The tactile input device according to claim 1, wherein: One end of the shaft is connected with a knob.

8. The tactile input device according to claim 4, wherein: A switch portion is also arranged inside the accommodation portion. A pressing portion for pressing the switch portion is protrudingly formed at the other end of the shaft portion.

9. The tactile input device according to claim 1, wherein: The other end of the shaft portion at least includes a pressing portion for pressing the elastic portion, and a space, namely a flow portion, for the magnetorheological fluid to move is formed between the pressing portions.

10. The tactile input device according to claim 3, wherein: A locking portion is formed on a side surface of the shaft portion, and the locking portion limits the driving range of the shaft portion to a lower surface of the shaft through hole of the first housing.

11. The tactile input device according to claim 3, wherein: The invention further includes a yoke portion which is arranged in the inner space of the second housing and provides a second inner space.

12. The tactile input device according to claim 11, wherein: The second inner space of the yoke is filled with the magnetorheological fluid, an upper portion of the second inner space is sealed by the first housing, and a lower portion of the second inner space is sealed by the second housing.

13. The tactile input device according to claim 11, wherein: The magnetic circuit portion is arranged in a space between the yoke and the second housing.

14. The tactile input device according to claim 11, wherein: The elastic portion is disposed in the second inner space, and the other end of the shaft portion is inserted into the elastic portion.

15. The tactile input device according to claim 14, wherein: A stopper is further formed on the side of the shaft portion, and the stopper has a width corresponding to the width of the second internal space. The inner side surface of the yoke guides the shaft to be driven along the Z-axis direction in the second inner space.

16. The tactile input device according to claim 15, wherein: A side portion is further extended downwardly from the end of the locking portion.

17. The tactile input device according to claim 4, wherein: A locking portion is formed on the side of the shaft portion. The invention further comprises a protector portion, which is arranged below the stop portion and covers the outer periphery of the shaft portion, and is arranged above the accommodating portion to prevent the magnetorheological fluid from leaking from the accommodating portion.

18. The tactile input device according to claim 1, wherein: The plurality of elastic portions are horizontally arranged along the XY plane direction inside the accommodation portion.

19. The tactile input device according to claim 1, wherein: The magnetic circuit portion comprises: A first pole and a second pole for forming a magnetic field; A first magnetic core and a second magnetic core, wherein the first magnetic core is inserted in the first pole, and the second magnetic core is inserted in the second pole.

20. The tactile input device according to claim 19, wherein: The magnetic path portion is used to connect the outer side of the first magnetic core and the outer side of the second magnetic core, and further includes a magnetic edge portion which is used to wrap the outer side of the first pole and the outer side of the second pole.

Images