Haptic input device

Abstract

The present invention relates to a haptic input device. The haptic input device according to the present invention provides a haptic sense of touch to a user, the haptic input device being characterized by comprising: a case unit for providing an inner space; a shaft unit having one end exposed to the outside and the other end positioned in the inner space of the case unit; a magnetic circuit unit which forms a magnetic circuit, and the upper side of which is connected to the other end of the shaft unit; an elastic unit provided to be in contact with the lower side of the magnetic circuit unit and providing a restoring force to the shaft unit and the magnetic circuit unit; and a magnetorheological fluid filling at least a portion of the inner space.

Description

haptic input device

[0001] The present invention relates to a haptic input device. More specifically, it relates to a haptic input device capable of providing a haptic sensation when a user inputs data through the input device.

[0002] There is growing interest in interfaces that are natural, easy to use, and enable communication when using various electronic and mechanical devices. Computer input devices such as keyboards, mice, touchpads, touch pens, and tablets provide input for applications and cursor control on displays.

[0003] Some interface devices can provide haptic feedback to the user. For example, joysticks, mice, gamepads, steering wheels, or other devices can provide haptic sensations to the user based on events or interactions occurring on the display, such as in a game or other application program.

[0004] Meanwhile, input methods such as touchpads and voice recognition are increasing to provide a more user-friendly interface. Nevertheless, button-type input devices, such as keyboards and mice, remain the most commonly used. However, these button-type input devices have a limitation: they only provide feedback on external force applied by the user through the repulsive force of elastic means such as springs. In other words, they are limited to providing the same tactile sensation, failing to provide diverse feedback to the user.

[0005] The purpose of the present invention is to provide a haptic input device that can provide a tactile sensation to a user and can provide a variety of tactile sensation forms.

[0006] In addition, the present invention aims to provide a haptic input device that can be configured to be small and thin and can be driven with little energy.

[0007] However, these tasks are exemplary and the scope of the present invention is not limited thereby.

[0008] The above object of the present invention is achieved by a haptic input device that provides a haptic sensation to a user, comprising: a case portion providing an internal space; a shaft portion having one end exposed to the outside and the other end positioned in the internal space of the case portion; a magnetic circuit portion having an upper side connected to the other end of the shaft portion and forming a magnetic circuit; an elastic portion provided to contact a lower side of the magnetic circuit portion and providing a restoring force to the shaft portion and the magnetic circuit portion; and a magnetorheological fluid filling at least a portion of the internal space.

[0009] In addition, according to one embodiment of the present invention, the case part includes a first case disposed at the upper portion and having a shaft passage hole formed therein through which the shaft part passes; and a second case disposed at the lower portion and providing the internal space in which the magnetorheological fluid is accommodated; and the elastic part may be disposed at the lower portion of the internal space of the second case.

[0010] Additionally, according to one embodiment of the present invention, a protector part that prevents the magnetorheological fluid from leaking from the internal space may be disposed between the first case and the second case.

[0011] In addition, according to one embodiment of the present invention, a catch portion is formed on a side surface of the shaft portion, and the protector portion is connected to a lower portion of the catch portion and can wrap around the outer circumference of the shaft portion.

[0012] Additionally, according to one embodiment of the present invention, the protector portion is formed of an elastic material and can set the upper and lower driving range of the shaft portion.

[0013] In addition, according to one embodiment of the present invention, the protector portion has wrinkles and is stretched in the vertical direction, and when a force is applied downward to one end of the shaft portion, the catch portion can be stretched downward while pulling the protector portion.

[0014] In addition, according to one embodiment of the present invention, the magnetic circuit unit may further include a control unit that controls the magnetic circuit formed by the magnetic circuit unit.

[0015] Additionally, according to one embodiment of the present invention, a terminal passage is formed along the forming direction of the singi shaft portion, and the control portion can be electrically connected to the magnetic circuit portion through the terminal passage.

[0016] In addition, according to one embodiment of the present invention, the magnetic circuit part may include a magnetic case part that provides a coil receiving space; a coil part that is disposed in the coil receiving space and generates a magnetic field; and a core part that is fitted into the coil part.

[0017] Additionally, according to one embodiment of the present invention, the magnetic circuit part may be provided together with the other end of the shaft part so as to be able to move up and down together in the internal space.

[0018] In addition, according to one embodiment of the present invention, the core part may include a core fitted into the coil part; and a magnetic cover part disposed on an upper portion of the magnetic case part to seal the coil receiving space.

[0019] Additionally, according to one embodiment of the present invention, the shaft portion, the core portion, and the magnetic case portion may be made of a non-magnetic material.

[0020] In addition, according to one embodiment of the present invention, a shaft head portion is interposed between the magnetic circuit portion and the other end of the shaft portion, and the shaft head portion may include a first shaft head portion formed to extend in a direction perpendicular to the movement direction of the shaft portion; and a second shaft head portion formed to extend downward from the first shaft head portion and have an inner surface formed to be spaced apart from an outer surface of the magnetic circuit portion by a predetermined distance.

[0021] Additionally, according to one embodiment of the present invention, the magnetorheological fluid can move into a space spaced apart from the outer surface of the magnetic circuit portion.

[0022] Additionally, according to one embodiment of the present invention, at least one flow hole may be formed in the thickness direction of the first shaft head portion so that the magnetorheological fluid can move in an up-and-down direction in the first shaft head portion.

[0023] Additionally, according to one embodiment of the present invention, a knob may be connected to one end of the shaft portion.

[0024] In addition, according to one embodiment of the present invention, a position sensor unit may be further included, which is disposed on the outer surface of the case unit or the inner space and senses the position at which the shaft unit moves.

[0025] According to the present invention configured as described above, there is an effect of being able to provide a tactile sensation to a user and providing a variety of tactile sensation forms.

[0026] In addition, according to the present invention, it is possible to configure a small and thin body and to operate with less energy.

[0027] Of course, the scope of the present invention is not limited by these effects.

[0028] FIG. 1 is a schematic diagram illustrating a haptic input device according to one embodiment of the present invention.

[0029] FIG. 2 is a schematic exploded perspective view showing a haptic input device according to one embodiment of the present invention.

[0030] FIG. 3 is a schematic diagram showing a case portion of a haptic input device according to one embodiment of the present invention.

[0031] FIG. 4 is a schematic diagram showing a shaft portion of a haptic input device according to one embodiment of the present invention.

[0032] FIG. 5 is a schematic diagram showing a magnetic circuit and magnetic force lines of a haptic input device according to one embodiment of the present invention.

[0033] FIG. 6 is a schematic diagram showing an elastic part of a haptic input device according to one embodiment of the present invention.

[0034] FIG. 7 is a schematic diagram showing a protector portion of a haptic input device according to one embodiment of the present invention.

[0035] Fig. 8 is a schematic diagram showing a position sensor unit of a haptic input device according to one embodiment of the present invention.

[0036] Figure 9 is a schematic diagram showing a driving process of a haptic input device according to one embodiment of the present invention.

[0037] FIG. 10 is a schematic diagram showing a haptic input device according to another embodiment of the present invention.

[0038] FIG. 11 is a schematic exploded perspective view showing a haptic input device according to another embodiment of the present invention.

[0039] FIG. 12 is a schematic cross-sectional view showing a haptic input device according to another embodiment of the present invention.

[0040] Fig. 13 is a schematic diagram showing a shaft portion and a magnetic circuit portion of a haptic input device according to another embodiment of the present invention.

[0041] Fig. 14 is a schematic diagram showing the driving process of a haptic input device according to another embodiment of the present invention.

[0042] Fig. 15 is a schematic diagram showing a position sensor unit of a haptic input device according to another embodiment of the present invention.

[0043] <Explanation of symbols>

[0044] 100, 200: Haptic input device

[0045] 110, 210: Case section

[0046] 120, 220: Shaft

[0047] 130, 230: Magnetic circuit

[0048] 140, 240: Elastic part

[0049] 160: Control unit

[0050] 170, 270: Knob

[0051] 180, 280: Position sensor section

[0052] 190, 290: Protector section

[0053] 250: Shaft head

[0054] M: Magnetorheological fluid

[0055] MF: Magnetic field lines

[0056] Reference is made to the accompanying drawings, which illustrate exemplary embodiments. These embodiments are described in sufficient detail to enable those skilled in the art to practice the present invention. It should be understood that the various embodiments of the present invention, while different from each other, are not necessarily mutually exclusive. For example, specific shapes, structures, and characteristics described herein may be implemented in other embodiments without departing from the spirit and scope of the present invention. Furthermore, it should be understood that the positions or arrangements of individual components within each disclosed embodiment may be modified without departing from the spirit and scope of the present invention. Accordingly, the following detailed description is not intended to be limiting, and the scope of the present invention is defined only by the appended claims, along with the full scope of equivalents to which such claims are entitled, if properly explained. Like reference numerals in the drawings designate the same or similar functions throughout, and lengths, areas, thicknesses, and other shapes may be exaggerated for convenience.

[0057] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the attached drawings so that a person having ordinary skill in the art to which the present invention pertains can easily practice the present invention.

[0058] The haptic input device (100, 200) of the present invention can provide a haptic sensation when a user applies an external force to perform an input operation. The haptic input device (100, 200) of the present invention can be applied without limitation to input devices that a user can press to perform an input, such as a keyboard, mouse, or button.

[0059] Fig. 1 is a schematic diagram illustrating a haptic input device (100) according to one embodiment of the present invention. Fig. 2 is a schematic exploded perspective view illustrating a haptic input device (100) according to one embodiment of the present invention. Fig. 3 is a schematic diagram illustrating a case portion (110) of a haptic input device according to one embodiment of the present invention.

[0060] Referring to FIGS. 1 to 3, a haptic input device (100) according to one embodiment of the present invention (first embodiment) may include a case portion (110: 111, 115), a shaft portion (120), a magnetic circuit portion (130), an elastic portion (140), and a magnetorheological fluid (M). In addition, a control portion (160), a knob (170), a position sensor portion (180), a protector portion (190), etc. may be included.

[0061] The case portion (110: 111, 113, 115) serves as a housing of the haptic input device (100) and may provide an internal space (R1) for storing other components. The case portion (110) may include a first case (111) positioned at the top, a second case (113) positioned at the bottom, and a third case (115) covering the second case (113). The internal space may be formed as the first case (111) and the second case (113) are connected or fitted together. The case portion (110) may be formed of a material such as SUS or PC (polycarbonate).

[0062] The first case (111) is provided in a roughly flat shape. The first case (111) may be provided with a shaft passage hole (112) so that the shaft portion (120) can move up and down in the Z-axis direction. Referring to FIG. 3, the first case (111) and the second case (113) may have a shape that is fitted through a fastening means (119). Accordingly, the internal space (R1) of the case portion (110) may be closed except for the shaft passage hole (112). The second case (113) may be covered by the third case (115) to form the outer shape of the case.

[0063] The second case (113) may be provided in a roughly hexahedral shape with an open top. Control holes (H1, H2) may be formed on the sides of the second case (113) and the third case (115) so that the control unit (160) can be connected to the magnetic circuit unit (130).

[0064] And, in the internal space (R1) of the second case (113), a receiving portion (117) (the portion into which the lower portion of the shaft (120) is fitted in FIGS. 8 and 9) for receiving a magnetorheological fluid (M) can be formed. The receiving portion (117) can be formed in the shape of a tube or column with an open upper portion. In the case where the lower surface of the receiving portion (117) is replaced with the inner lower surface of the second case (113), the receiving portion (117) can be formed in the shape of a tube or column with open upper and lower portions.

[0065] The receiving portion (117) can provide a receiving space (R2) in the same direction as the extension direction (Z-axis direction) of the shaft portion (120). The shape of the receiving space (R2) of the receiving portion (117), i.e., the inner diameter, can be formed to correspond to the outer diameter of the shaft portion (120). Therefore, when the shaft portion (120) operates in the Z-axis direction, there is an advantage in that the shaft portion (120) can operate without the axis thereof deviating within the receiving space (R2). It is preferable that the height of the receiving space (R2) be less than the length in the Z-axis direction of the portion of the shaft portion (120) arranged in the inner space (R1) of the case portion (110).

[0066] A magnetorheological fluid (M) can be filled in the receiving space (R2) of the receiving portion (117). The magnetorheological fluid (M) includes magnetic particles and a fluid-like medium such as oil or water in which magnetic particles are dispersed. It is preferable that the magnetorheological fluid (M) be placed in a sealed state by a shaft portion (120) within the receiving space.

[0067] FIG. 4 is a schematic diagram showing a shaft portion (120) of a haptic input device according to one embodiment of the present invention.

[0068] The shaft portion (120: 121, 125) may be provided to directly transmit a haptic sensation as a repulsive force in response to an external force applied to the user. The shaft portion (120) may be formed to extend approximately in the Z-axis direction. One end (upper end) of the shaft portion (120) may be exposed to the outside of the case portion (110), and the other end (lower end) may be positioned in the internal space (R1) of the case portion (110).

[0069] The upper shaft portion (121) may have one end (upper end) exposed to the outside of the case portion (110) through the shaft passage hole (112) of the first case portion (111). Optionally, a knob (knob, 170) [see Fig. 1] may be connected to one end of the upper shaft portion (121). The knob (170) may serve to expand the surface area that the user contacts with the haptic input device (100) and to better convey a haptic sensation to the user.

[0070] A catch (124) may be formed on the side surface of the upper shaft portion (121). The catch (124) may be formed to protrude in the lateral direction (XY plane formation direction) of the shaft portion (120). The catch (124) may limit the upper limit of the driving range of the shaft portion (120) so that the shaft portion (120) does not escape to the outside through the shaft passage hole (112) of the first case portion (111). It is preferable that the catch (124) protrude in the lateral direction of the upper shaft portion (121) so that it does not enter the receiving space (R2) of the receiving portion (117).

[0071] The lower shaft portion (125) is a portion that actually enters the receiving space (R2) of the receiving portion (117). The upper shaft portion (121) and the lower shaft portion (125) can be fastened to each other through a fastening means (175). An insertion hole (122) may be formed in the upper shaft portion (121) so that the fastening means (175) can be inserted, and a fastening groove (126) may be formed in the lower shaft portion (125). An elastic portion (140) may be interposed between the upper shaft portion (121) and the lower shaft portion (125). The protector portion (190) may be fitted to the lower shaft portion (125).

[0072] Fig. 5 is a schematic diagram illustrating a magnetic circuit and magnetic lines of force of a haptic input device according to one embodiment of the present invention. The upper drawing of Fig. 5 illustrates the magnetic circuit (130), and the lower drawing illustrates an example of magnetic lines of force (MF) formed in the magnetic circuit (130).

[0073] The magnetic circuit unit (130) can form a magnetic circuit for changing the behavior of the magnetorheological fluid (M). The magnetic circuit unit (130) can generate a magnetic field, which is a magnetic circuit, using a control signal or control power received from the control unit (160). The magnetic circuit unit (130) can use a means for controlling the direction of the magnetic field. Preferably, the magnetic circuit unit (130) can change the direction of the magnetic field by controlling the direction of the flowing current by including a solenoid coil.

[0074] The magnetic circuit part (130) may be provided in a form that surrounds the shaft part (120) within the internal space (R1) of the case part (110). The first pole (131) and the second pole (132) may include a coil and may be provided to include a solenoid electromagnet. In order to form a magnetic force line (MF) across the entire vertical direction of the internal space (R1), the first pole (131) and the second pole (132) may be in a form in which the coil is wound so as to be arranged across the entire vertical length of the internal space (R1).

[0075] The first pole (131) and the second pole (132) can be fitted into the first core (135) and the second core (136), respectively. In addition, a magnetic frame (137) can be interposed to electrically / magnetically connect the first core (135) and the second core (136) to each other. The magnetic frame (137) can form an outer rim of the magnetic circuit (130). The magnetic frame (137) can be provided in a structure that surrounds the outer sides of the first pole (131) and the second pole (132), and interconnects the outer sides of the first core (135) and the second core (136).

[0076] The magnetic frame (137) can be formed horizontally with respect to the XY plane direction. The outer surface of the magnetic frame (137) can correspond to the inner surface of the second case (113). When the magnetic frame (137) is fitted and supported on the inner surface of the second case (113), the magnetic circuit (130) can be stably placed in the internal space (R1).

[0077] In addition, similar to the shaft portion (120), the magnetic rim portion (137) may include at least a magnetic portion. The first core (135) and the second core (136) may also include at least a magnetic portion. Accordingly, magnetic force lines (MF) may be formed along the formation direction (XY plane direction) of the magnetic rim portion (137) in addition to the vertical direction (Z-axis direction) of the internal space (R1). Since the magnetic force lines (MF) are formed in a wider range in the internal space (R1), the shaft (120) may be subjected to greater forces such as shear force, resistance force, torque, and stiffness change during driving in the Z-axis direction.

[0078] A control unit (160) may be provided to control a magnetic circuit formed by a magnetic circuit unit (130). The control unit (160) may include a control circuit unit that substantially transmits a control signal or control power to the magnetic circuit unit (130) and a control terminal unit that receives power from an external power supply means (not shown) and transmits the power to the control circuit unit.

[0079] FIG. 6 is a schematic diagram showing an elastic part (140) of a haptic input device according to one embodiment of the present invention.

[0080] The elastic member (140) is disposed in the internal space (R1) of the case member (110). The edge portion (145) of the elastic member (140) can be supported on the step (114) [see FIG. 2] of the second case member (113). The elastic member (140) is not disposed in the receiving space (R2) of the receiving member (117). When the edge portion (145) of the elastic member (140) is connected to the second case member (113), the elastic member (140) can be provided in a floating form. Since the elastic member (140) has a planar spring structure, it can vibrate up and down. The elastic member (140) is sandwiched between the upper shaft member (121) and the lower shaft member (125), so that the Z-axis movement of the shaft member (120) can be affected by the vibration of the elastic member (140). Since the elastic part (140) is not in the form of a coil spring but has a plate spring structure, the shaft part (120) has the effect of being able to drive stably in the Z-axis direction without shaking unstably in the X-axis and Y-axis directions.

[0081] Fig. 7 is a schematic diagram showing a protector portion (190) of a haptic input device according to one embodiment of the present invention.

[0082] A protector (190) may be arranged to surround the outer circumference of the lower shaft portion (125). The protector portion (190) has an insertion hole (192) in the center, and the lower shaft portion (125) may be inserted into the insertion hole (192). The protector portion (190) may be formed of an elastic material. The protector portion (190) may be formed of an elastic material such as silicone, silicone rubber, rubber, polymer, etc., and preferably may be formed of a silicone material. The protector portion (190) may have at least a wrinkle (191). The vertical length of the protector portion (190) may be variable through the elastic material properties and the shape of the wrinkles (191). When the protector portion (190) is stretched in the Z-axis direction, the wrinkles (191) may be spread out, and when the protector portion (190) is compressed, more wrinkles (191) may be formed.

[0083] The protector part (190) may be positioned below the catch (124) formed on the side of the upper shaft part (121). The protector part (190) may be fitted between the upper shaft part (121) and the lower shaft part (125). The protrusion (127) formed on the upper part of the lower shaft part (125) may pass through the hole (193) formed on the upper surface of the protector part (190), and the upper shaft part (121) and the lower shaft part (125) may be coupled. The fastening means (175) may pass through the center hole (193) formed on the upper surface of the protector part (190). Holes (146) [see FIGS. 4 and 6] may also be formed in the elastic part (140) to correspond to the holes (193) of the protector part (190), and may be provided so that the fastening means (175) and the protrusion (127) may pass through them.

[0084] In addition, the protector part (190) can be placed on the upper part of the receiving part (117). Accordingly, the magnetorheological fluid (M) filled in the receiving space (R2) of the receiving part (117) can be prevented from leaking out of the receiving part (117).

[0085] Fig. 8 is a schematic diagram showing a position sensor unit (180) of a haptic input device according to one embodiment of the present invention.

[0086] The position sensor unit (180) can sense the depth (d) at which the shaft unit (120) descends. Depending on the position of the shaft unit (120) sensed by the position sensor unit (180), the control unit (160) can control the shape of the magnetic field generated by the magnetic circuit unit (130). For example, when the shaft unit (120) is pressed a lot, the elastic unit (140) stretches a lot and the force trying to restore it increases, so the position sensor unit (180) can sense the position of the shaft unit (120) and gradually control the strength of the magnetic field to weaken. Accordingly, the shaft unit (120) can be controlled to be pressed with a constant force from beginning to end. The position sensor unit (180) can sense the position of the engaging unit (124) of the shaft unit (120), and can also sense the distance by which a part of the elastic unit (140) moves downwards or upwards based on the Z-axis direction. The position sensor unit (180) can use a known optical sensor, etc.

[0087] Meanwhile, the position sensor unit (180) may use a Hall sensor that utilizes the Hall effect principle. The Hall sensor is a sensor that utilizes the fact that when a magnetic field (Bp) is applied or brought near while a current (Iref) is flowing in a conductor and free electrons are moving in the opposite direction of the current, the free electrons moving due to the Hall effect are subjected to the Lorentz force according to Fleming's left-hand rule and their moving direction is bent. Due to the Hall effect, a potential difference is generated at both ends of the conductor in a direction perpendicular to the direction of the current flow, and a Hall voltage (Vhall) is formed in the installed circuit by this electromotive force. When the direction of the current flow or the direction of the magnetic field is changed, the Hall effect and the Hall voltage also become opposite accordingly. If the position sensor unit (180) is a Hall sensor and a specific portion of the shaft unit (120) [e.g., a catch unit (124)] is formed of a magnetic material, the Hall voltage sensed by the position sensor unit (180) changes depending on the position of the shaft unit (120) or the distance between the specific portion and the position sensor unit (180), so that the position of the shaft unit (120) can be calculated.

[0088] Figure 9 is a schematic diagram showing a driving process of a haptic input device according to one embodiment of the present invention.

[0089] The first pole (131) and the second pole (132) of the magnetic circuit portion (130) can be formed in a vertical direction (Z-axis direction) in the internal space (R1). Accordingly, the magnetic circuit (or, magnetic field lines (MF)) can also be formed in a vertical direction corresponding to the formation direction of the magnetic circuit portion (130). In addition, since the shaft (120) and the magnetic frame portion (137) can also be formed of a magnetic material, they can contribute to forming the magnetic field lines (MF) in a horizontal plane direction as well. For example, as shown in the right drawing of FIG. 9, the magnetic field lines (MF) can form a magnetic loop along the upper portion of the first pole (131) / second pole (132) - the shaft portion (120) and the magnetic frame portion (137) - the lower portion of the first pole (131) / second pole (132).

[0090] As another example, when the first pole (131) and the second pole (132) have opposite polarities, a magnetic loop may be formed along the upper portion of the first pole (131) - the upper portion of the second pole (132) - the lower portion of the second pole (132) - the lower portion of the first pole (131).

[0091] When a user presses the shaft portion (120) (or knob (170)) by applying an external force (P), a force may be applied to the shaft portion (120) in response to the elastic force of the elastic portion (140). When a magnetic field is not applied and magnetic force lines (MF) are not formed, the elastic portion (140) may provide the user with a repulsive force corresponding to its own elastic force while being extended downward.

[0092] When a magnetic field is applied and magnetic field lines (MF) are formed, magnetic particles in the magnetorheological fluid (M) can form a magnetic chain in the direction of the magnetic field lines (MF). The magnetic chain can be formed to approximately reach one side of the lower shaft portion (125) from the inner wall of the receiving portion (117) where the magnetorheological fluid (M) is received. Due to the formation of the magnetic chain by the magnetic field lines (MF), resistance can be applied to the driving of the shaft portion (120) in the Z-axis direction. That is, the magnetic chain is formed in the direction parallel to the driving direction of the shaft portion (120) (Z-axis direction) and in the direction of the vertical horizontal plane (XY plane), and resistance can be applied in the Z-axis driving direction of the shaft portion (120). The resistance acting in the process of driving the shaft portion (120) in the Z-axis can vary depending on the strength of the magnetic field, the bonding force of the magnetic chain, etc. The user can receive a haptic sensation depending on the shape, pattern, strength, etc. of the resistance.

[0093] When the user's external force is released and the magnetic field of the magnetic circuit unit (130) is also released, the shaft unit (120) can return in the upward direction by the restoring force of the elastic unit (140).

[0094] In addition, when the user's external force (P) is applied, the catch (124) of the shaft portion (120) can compress the protector portion (190). Since the compressed protector portion (190) still surrounds the outer periphery of the shaft portion (120), the magnetorheological fluid (M) can be prevented from leaking out of the receiving portion (117). When the user's external force (P) is released, the shaft portion (120) returns upward due to the restoring force of the elastic portion (140), and the protector portion (190) can be extended upward again as the wrinkles (191) are straightened. As the protector portion (190) extends, a force pushing the catch (124) upward is added, so that the return speed can be faster than when only the elastic portion (140) is used.

[0095] Fig. 10 is a schematic diagram showing a haptic input device (200) according to another embodiment of the present invention. Fig. 11 is a schematic exploded perspective view showing a haptic input device (200) according to another embodiment of the present invention. Fig. 12 is a schematic side cross-sectional view showing a haptic input device (200) according to another embodiment of the present invention. Hereinafter, only the different configurations from the haptic input device (100) described above with reference to Figs. 1 to 3 will be described, and the same configurations will be replaced with those described above. It may be noted that the same configurations in the first and second embodiments correspond to each other with reference to the numbers 100 and 200. Hereinafter, unless otherwise described, each configuration of Figs. 10 to 12 will be replaced with that described above with reference to Figs. 1 to 3.

[0096] Referring to FIGS. 10 to 12, a haptic input device (200) according to another embodiment (second embodiment) may include a case portion (210: 211, 215), a shaft portion (220), a magnetic circuit portion (230), an elastic portion (240), and a magnetorheological fluid (M). Here, a control portion (not shown), a knob (270), a position sensor portion (280), a protector portion (290), etc. may be further included.

[0097] The case portion (210: 211, 215) serves as a housing for the haptic input device (200) and may provide an internal space (R3) for storing other components. The case portion (110) may include a first case (211) positioned at the top and a second case (215) positioned at the bottom.

[0098] The first case (211) may be provided with a shaft passage hole (212) so that the shaft portion (220) can move up and down in the Z-axis direction. The second case (215) may be provided in a roughly columnar shape with an open upper portion. An internal space (R3) may be formed as the first case (211) and the second case (215) are connected or fitted together. The case portion (210) may be formed of a material such as SUS, PC (polycarbonate), SPCC (Steel Plate Cold Commercial, cold-rolled steel plate).

[0099] A magnetorheological fluid (M) can be accommodated in the internal space (R3) of the second case (215).

[0100] FIG. 13 is a schematic diagram showing a shaft portion (220) and a magnetic circuit portion (230) of a haptic input device (200) according to another embodiment of the present invention.

[0101] Referring to FIGS. 10 to 13, the shaft portion (220) and the magnetic circuit portion (230) can be provided to be interconnected so as to move together in the internal space (R3).

[0102] The shaft portion (220) can be formed to extend approximately in the Z-axis direction. One end (upper end) of the shaft body (221) of the shaft portion (220) can be exposed to the outside of the case portion (210), and the other end (lower end) can be positioned in the internal space (R3) of the case portion (210).

[0103] The shaft portion (220) may have one end (upper end) exposed to the outside of the case portion (210) through the shaft passage hole (212) of the first case portion (211). Optionally, a knob (knob, 270) [see Fig. 10] may be connected to one end of the shaft portion (220).

[0104] A catch (224) may be formed on the side surface of the shaft portion (220) [or, shaft body (221)]. The catch (224) may be formed to protrude in the side direction (XY plane formation direction) of the shaft portion (220). The catch (224) may limit the upper limit of the driving range of the shaft portion (220) so that the shaft portion (220) does not escape to the outside through the shaft passage hole (212) of the first case portion (211).

[0105] A terminal passage (223) may be formed inside the shaft portion (220) along the formation direction (longitudinal direction, Z-axis direction) of the shaft portion (220). An electrical connection path may be formed from a control portion (not shown) to a magnetic circuit portion (230) through this terminal passage (223). Accordingly, a control portion disposed outside the haptic input device (200) may control the magnetic circuit of the magnetic circuit portion (230). However, the control portion may also be disposed inside the haptic input device (200).

[0106] A circuit connection portion (225) may be formed at the other end (lower end) of the shaft portion (220) to have a width wider than the width of the shaft body (221). The circuit connection portion (225) may be connected to the upper portion of the magnetic circuit portion (230) with a wide width to support the magnetic circuit portion (230) so that it can move up and down stably. In addition, since the circuit connection portion (225) has a width wider than the shaft body (221), there is an advantage in that a terminal passage (223) electrically connected to the magnetic circuit portion (230) can be provided with ample space.

[0107] The magnetic circuit part (230) may be provided to be able to move up and down like the shaft part (220) within the internal space (R3). The magnetic circuit part (230) may include a coil part (231), a core part (233: 233a, 233b), and a magnetic case part (235).

[0108] The magnetic case (235) can provide a coil accommodation space (R4) in which the coil portion (231) can be accommodated. The magnetic case (235) can be provided in a roughly columnar shape with an open top.

[0109] The core (233a) of the core portion (233) may be provided to be fitted into the coil portion (231). A magnetic cover portion (233b) may be formed in the XY plane direction on the upper portion of the core (233a). The upper portion of the magnetic cover portion (233b) may be connected to the lower portion (or, circuit connection portion (225)) of the shaft portion (220). The magnetic cover portion (233b) may be connected to the magnetic case portion (235) to seal the coil accommodation space (R4). Accordingly, there is an advantage in that the magnetorheological fluids (M) of the internal space (R3) can be prevented from flowing into the interior of the magnetic circuit portion (230). In addition, even if the magnetic circuit portion (230) is immersed in the magnetorheological fluid (M), there is an advantage in that it is not affected by the generation of a magnetic field, and a haptic torque can be generated by the generation of a magnetic field simultaneously with the movement of the magnetic circuit portion (230).

[0110] Referring further to FIGS. 11 to 13, a shaft head portion (250) may be further interposed between the magnetic circuit portion (230) and the lower end of the shaft portion (220). The shaft head portion (250) may be formed in a substantially columnar shape with an open bottom. The shaft head portion (250) may include a first shaft head portion (251) formed to extend in a direction perpendicular to the movement direction of the shaft portion (220) and a second shaft head portion (252) formed to extend downward from the first shaft head portion (251).

[0111] A hole (253) may be formed at the center of the first shaft head portion (251) so that the lower portion of the shaft portion (220) may pass through and be connected to the magnetic cover portion (233b) of the magnetic circuit portion (230). In addition, the first shaft head portion (251) may have at least one flow hole (255) formed in the thickness direction. The second shaft head portion (252) may have an inner surface formed to be spaced apart from the outer surface of the magnetic circuit portion (230) by a predetermined distance.

[0112] The space (G) spaced apart from the outer surface of the magnetic circuit portion (230) can be provided as a passage for the magnetorheological fluid (M). For example, when the shaft portion (220) and the magnetic circuit portion (230) move downward in the internal space (R3), the magnetorheological fluid (M) can move to the space (G) and move upward through the flow hole (255) of the first shaft head portion (251). Conversely, since there is the space (G) and the flow hole (255), the shaft portion (220) and the magnetic circuit portion (230) can move up and down without the influence of the magnetorheological fluid (M).

[0113] Meanwhile, an electrical connection path must be formed along the terminal passage (223) from an external control unit (not shown), and the shaft unit (220) may be made of a non-magnetic material so that this electrical connection signal does not affect the magnetorheological fluid (M). In addition, the magnetic cover unit (233b) may also be made of a non-magnetic material so as to induce the formation of a magnetic circuit to the outside of the magnetic circuit unit (230) and prevent a short circuit with the electrical connection path.

[0114] The magnetic case part (235) can include a non-magnetic part so that magnetic force lines (MF) are formed not only along the vertical direction (Z-axis direction) of the internal space (R3) but also along the formation direction (XY plane direction) of the magnetic circuit part (130).

[0115] Referring again to FIGS. 10 to 12, the elastic member (240) may be placed in the internal space (R3) of the case member (220) (or, the second case (225)). The elastic member (240) may be any means that provides elasticity, such as a spring, without limitation. The elastic member (240) may be placed so as to be in contact with the lower side of the magnetic circuit member (230), thereby providing a restoring force so that the shaft member (220) and the magnetic circuit member (230) move upward.

[0116] Meanwhile, a protector (290) may be placed between the first case (221) and the second case (225). The protector (290) may be formed of an elastic material so as to be vertically stretchable. The protector (290) may be formed of an elastic material such as silicone, silicone rubber, rubber, or a polymer, and preferably may be formed of a silicone material. The protector (290) may have at least wrinkles to facilitate stretchability.

[0117] The protector (290) can wrap around the outer circumference of the shaft (220). In addition, it can be connected to the lower portion of the catch (224) formed on the side of the shaft (220) while wrapping around the outer circumference of the shaft (220). When the shaft (220) moves downward, the protector (290) can pull downward the portion of the protector (290) connected to the catch (224), thereby straightening out wrinkles and stretching the protector (290). The limit to which the elastic portion (240) is pressed downward or the limit to which the protector (290) is stretched downward may correspond to the bottom dead point to which the shaft (220) can move. Conversely, when the user moves the shaft portion (220) upward or pushes the shaft portion (220) upward by the restoring force of the elastic portion (240), the portion of the protector portion (290) connected to the catch portion (224) can be pulled upward. The limit at which the catch portion (224) contacts the first case portion (221) may correspond to the top dead center at which the shaft portion (220) can move.

[0118] As described above, the protector part (290) can set the range of vertical movement of the shaft part (220). In addition, the protector part (290) has the effect of preventing the magnetorheological fluid (M) from leaking by closing the open upper part of the second case (225) even during vertical movement of the shaft part (220).

[0119] Fig. 14 is a schematic diagram showing the driving process of a haptic input device (200) according to another embodiment of the present invention.

[0120] Referring to (a) of Fig. 14, before the user presses the shaft portion (220) [or knob (270)], no external force is applied to the elastic portion (240), so the elastic portion (240) is in an extended state. The shaft portion (220) can be positioned at top dead center. When the internal space (R3) is filled with a magnetorheological fluid (M) and no magnetic field is applied, the shaft portion (220) can be positioned at top dead center by the supporting force (restoring force) of the elastic portion (240).

[0121] Referring to (b) of Fig. 14, when a user presses the shaft portion (220) [or knob (270)] by applying an external force (P), a force may be applied to the shaft portion (220) / magnetic circuit portion (230) in response to the elastic force of the elastic portion (240). When a magnetic field is not applied and magnetic force lines (MF) are not formed, the elastic portion (240) may provide the user with a repulsive force corresponding to its own elastic force while being compressed (240 -> 240').

[0122] When a magnetic field is applied and magnetic lines of force (MF) are formed, magnetic particles in the magnetorheological fluid (M) can form a magnetic chain in the direction of the magnetic lines of force (MF). The magnetic chain can be formed to approximately reach the outer side of the shaft head portion (250) from the inner wall of the second case (221) containing the magnetorheological fluid (M), and from the inner side of the shaft head portion (250) to the outer side of the magnetic circuit portion (230). Due to the formation of the magnetic chain by the magnetic lines of force (MF), resistance can be applied to the driving in the Z-axis direction of the shaft portion (220) / magnetic circuit portion (230). That is, the magnetic chain is formed in a direction parallel to the driving direction of the shaft portion (220) / magnetic circuit portion (230) (Z-axis direction) and in a vertical horizontal plane (XY plane), and resistance can be applied in the Z-axis driving direction of the shaft portion (220) / magnetic circuit portion (230).

[0123] The resistance applied during the process of driving the shaft part (220) / magnetic circuit part (230) in the Z-axis can vary depending on the strength of the magnetic field, the bonding force of the magnetic chain, etc. The user can receive a haptic sensation depending on the shape, pattern, strength, etc. of the resistance. In addition, since the magnetic circuit part (230) can also have the same position and apply a magnetic field according to the position of the shaft part (220), there is an advantage in that it is easy to maintain the resistance and torque during the process of moving up and down the shaft part (220) / magnetic circuit part (230). If the movements of the shaft part and the magnetic circuit part are different, a problem may occur in which the resistance and torque applied to the shaft part change in real time depending on the distance between the shaft part and the magnetic circuit part, but the present invention has an effect of solving this problem.

[0124] When the user's external force (P) is released and the magnetic field of the magnetic circuit unit (230) is also released, the shaft unit (220) / magnetic circuit unit (230) can return in the upward direction by the restoring force of the elastic unit (240).

[0125] FIG. 15 is a schematic diagram showing a position sensor unit (280) of a haptic input device (200) according to another embodiment of the present invention.

[0126] The position sensor unit (280) may be placed on the outer surface of the case unit (210). Alternatively, it may be placed in the internal space (R3) of the case unit (210), but in FIG. 15, an example in which it is placed on the outer surface of the case unit (210) is assumed and described. The position sensor unit (280) can sense the position (d) to which the shaft unit (220) moves. In other words, it can sense the depth (d) to which the shaft unit (220) descends.

[0127] Depending on the position of the shaft portion (220) sensed by the position sensor portion (280), the control portion (not shown) can control the shape of the magnetic field generated by the magnetic circuit portion (230). For example, when the shaft portion (220) is pressed a lot, the elastic portion (240) is compressed a lot and the force to restore it increases, so the position sensor portion (280) can sense the position of the shaft portion (220) and gradually control the strength of the magnetic field to weaken. Accordingly, the shaft portion (220) can be controlled to be pressed with a constant force from beginning to end. Meanwhile, as described above in FIG. 8, the position sensor portion (280) may use a Hall sensor. In addition, an acceleration sensor that senses the pressing speed of the shaft portion (220) may also be used.

[0128] The position sensor unit (280) senses the depth, speed, direction, etc. of the pressing of the shaft unit (220), and the control unit controls the magnetic field generated by the magnetic circuit unit (230) to adjust the resistance for driving the shaft unit (220) in the Z-axis direction. Accordingly, the user can be provided with a haptic sensation according to the shape, pattern, intensity, etc. of the resistance.

[0129] In addition, according to one embodiment, the position sensor unit (280) can sense the movement of the shaft unit (220), and implement additional functions such as lighting and sound in conjunction with this movement. For example, when the haptic input device (200) is used to control lighting, the intensity, pattern, color, etc. of the lighting can be adjusted according to the user's input. For example, when the haptic input device (200) is used to control sound, the intensity, pattern, etc. of the sound can be adjusted according to the user's input.

[0130] In addition, according to one embodiment, the position sensor unit (280) may be configured to display different additional functions depending on the degree of movement of the shaft unit (220). For example, when the haptic input device (200) is used in a car start button, the mode may be performed in stages such that when pressed to a depth of one level, the ACC mode is activated, when pressed to a depth of two levels, the vehicle power is turned on, and when pressed to a depth of three levels, the engine is started.

[0131] As described above, the present invention has the effect of providing a tactile sensation to a user during an input process through an input device and providing a variety of tactile sensation forms.

[0132] In addition, the present invention has the effect of implementing a haptic input device that is thin and simple in a small size. According to one embodiment, the haptic input device (100) of the present invention can be manufactured to have a width X length X thickness of about 20 mm X 20 mm X 18 mm, excluding the knob (170). The range of the driving stroke in which the shaft portion (120) is pressed can be about 4 mm.

[0133] In addition, the present invention has the effect of providing a haptic sensation with less energy by controlling resistance through the formation of a magnetic chain of a magnetorheological fluid (M) in addition to the elasticity and restoring force of the elastic part (140, 240).

[0134] While the present invention has been illustrated and described with reference to preferred embodiments as described above, it is not limited to the above-described embodiments, and various modifications and variations are possible by those skilled in the art without departing from the spirit of the invention. Such modifications and variations are deemed to fall within the scope of the present invention and the appended claims.

Claims

1. A haptic input device that provides a haptic sensation to the user. The case part that provides the internal space; A shaft portion having one end exposed to the outside and the other end positioned in the internal space of the case portion; A magnetic circuit part having an upper side connected to the other end of the shaft part and forming a magnetic circuit; An elastic member provided to contact the lower side of the magnetic circuit section and providing restoring force to the shaft section and the magnetic circuit section; A magnetorheological fluid filling at least a portion of the internal space; A haptic input device comprising:

2. In paragraph 1, The above case part, A first case disposed at the top and having a shaft passage hole formed therein through which the shaft portion passes; and A second case disposed at the bottom and providing an internal space in which the magnetorheological fluid is accommodated; Including, A haptic input device wherein the elastic member is disposed at the lower portion of the internal space of the second case.

3. In paragraph 2, A haptic input device, wherein a protector portion is disposed between the first case and the second case to prevent the magnetorheological fluid from leaking from the internal space.

4. In paragraph 3, A catch is formed on the side of the shaft portion, A haptic input device in which the above protector portion is connected to the lower part of the above catch portion and wraps around the outer circumference of the above shaft portion.

5. In paragraph 4, A haptic input device in which the above protector portion is formed of an elastic material and sets the upper and lower driving range of the shaft portion.

6. In paragraph 5, A haptic input device in which the above protector portion has wrinkles and is stretched in the vertical direction, and when a force is applied downward to one end of the shaft portion, the catch portion pulls the protector portion and is stretched downward.

7. In paragraph 1, A haptic input device further comprising a control unit that controls a magnetic circuit formed by the magnetic circuit unit.

8. In paragraph 7, A terminal passage is formed along the direction of formation of the singi shaft portion, A haptic input device, wherein the control unit is electrically connected to the magnetic circuit unit through the terminal passage.

9. In paragraph 1, The above magnetic circuit part, A magnetic case portion providing a coil accommodation space; A coil portion disposed in the above coil receiving space and generating a magnetic field; A core part fitted into the above coil part; A haptic input device comprising:

10. In paragraph 9, A haptic input device in which the magnetic circuit part is provided at the other end of the shaft part so as to be able to move up and down together in the internal space.

11. In paragraph 9, A haptic input device comprising: a core portion, a core fitted into the coil portion; and a magnetic cover portion disposed on the upper portion of the magnetic case portion to seal the coil receiving space.

12. In paragraph 9, A haptic input device wherein the shaft portion, the core portion, and the magnetic case portion are made of a non-magnetic material.

13. In paragraph 1, A shaft head portion is interposed between the magnetic circuit portion and the other end of the shaft portion, The above shaft head portion, A first shaft head portion formed to extend in a direction perpendicular to the movement direction of the shaft portion; and A second shaft head portion having an inner surface formed to extend downward from the first shaft head portion and to be spaced apart from the outer surface of the magnetic circuit portion by a predetermined distance; A haptic input device comprising:

14. In paragraph 13, A haptic input device in which the magnetorheological fluid can move within a space separated from the outer surface of the magnetic circuit unit.

15. In paragraph 13, A haptic input device in which at least one flow hole is formed in the thickness direction of the first shaft head portion so that the magnetorheological fluid can move in an up-and-down direction in the first shaft head portion.

16. In paragraph 1, A haptic input device in which a knob is connected to one end of the above shaft portion.

17. In paragraph 1, A haptic input device further comprising a position sensor unit disposed on the outer surface of the case unit or the inner space and sensing the position at which the shaft unit moves.

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