JP7036851B2 - Tactile presentation device - Google Patents

Description

The present invention relates to a tactile presentation device that presents a tactile sensation obtained when a surface of an object (for example, a touch panel or the like) is pressed.

Various devices have been proposed as devices for presenting a tactile sensation when touching a touch panel or the like of an electronic device. Among them, there is a tactile presentation device that changes the tactile sensation by utilizing a change in the state of a fluid as a device that does not require a complicated mechanism, structure, or the like.

For example, the touch panel disclosed in Patent Document 1 is composed of a sheet structure in which an electrolytic solution and an electrode are enclosed, and the electrolytic solution is vaporized by applying a voltage to the electrodes to expand the sheet structure. The load when the operator presses the touch panel with his fingertip is increased. After that, the gas generated by cutting off the voltage is liquefied and the expanded sheet structure is contracted so that the load when the operator presses the touch panel with the fingertip is returned to the original state.

Japanese Unexamined Patent Publication No. 2002-157087

However, since the touch panel disclosed in Patent Document 1 changes the tactile sensation by utilizing the vaporization / liquefaction of the electrolytic solution, the desired tactile sensation can be obtained by being affected by the surrounding environment (for example, temperature). It is considered difficult to reproduce it stably.

Therefore, the present invention provides a tactile presentation device that presents a tactile sensation by utilizing a state change of a fluid other than an electrolytic solution without requiring a complicated mechanism, structure, or the like in a portion that presents a tactile sensation. The purpose.

The tactile presenting device according to the present invention is a tactile presenting unit having a fluid accommodating body for accommodating a fluid, a fluid passage connected to the fluid accommodating body, and a magnetic field generation that applies a magnetic field to the fluid flowing through the fluid passage. A device is provided, and any of the above fluids is a ferrofluid (first invention).

According to the tactile presenting device having such a configuration, when the fluid accommodating body of the tactile presenting portion is pressed by the user's fingertip or the like, the magnetic viscous fluid flows out from the fluid accommodating body to the fluid passage, but the magnetic field is applied to the magnetic viscous fluid. By applying a magnetic field by the generator, resistance is generated in the flow of the magnetically viscous fluid according to the strength of the magnetic field. The resistance of the flow of the ferrofluid is reflected as a tactile sensation (load) when the fluid accommodating body of the tactile sensation presenting portion is pressed with a fingertip or the like.

Further, another tactile presenting device according to the present invention applies a magnetic field to a tactile presenting unit having a fluid accommodating body, a fluid passage connected to the fluid accommodating body, and a fluid flowing through the fluid path. A magnetic field generator for applying the fluid is provided, and a piston is fitted in the fluid passage so as to be movable along the passage, and magnetic magnetism is applied to the fluid accommodating body and the fluid accommodating body side of the piston in the fluid passage. A fluid other than the viscous fluid is filled, and the magnetic viscous fluid is filled on the side of the piston in the fluid passage opposite to the fluid accommodating side, so that the magnetic field generator applies a magnetic field to the magnetic viscous fluid. It is provided (second invention).

According to the tactile presentation having such a configuration, the inconvenience caused by the fact that the fluid in the fluid accommodating body of the tactile presentation unit is a ferrofluid can be eliminated.

In the tactile presentation device according to the second invention, it is preferable that the fluid other than the ferrofluid is a transparent or translucent liquid (third invention).

According to the tactile presentation having such a configuration, for example, by making the fluid accommodating body of the tactile presenting portion transparent or translucent, it is possible to arrange a display board or the like to be shown through on the back surface of the fluid accommodating body. Become.

In the tactile presentation device according to the first invention, it is preferable to further include a magnetic field generator that applies a magnetic field to the magnetic viscous fluid in the fluid accommodation (fourth invention).

According to the tactile presentation provided with such a configuration, even when a magnetic field is applied to the magnetic viscous fluid in the fluid container, the tactile sensation (load) according to the strength of the magnetic field when the fluid container is pressed with a fingertip or the like is obtained. Presented. Further, by pressing the fluid accommodating body with a fingertip or the like and applying a strong magnetic field of a certain level or more to the magnetic viscous fluid in the fluid accommodating body in a state where the shape, thickness, etc. of the fluid accommodating body are changed. The state of the shape, thickness, etc. of the fluid container can be maintained.

Still another tactile presenter according to the present invention includes a tactile presenter having a fluid accommodating body for accommodating a ferrofluid, and a fluid passage connected to the fluid accommodating body. It further comprises a magnetic field generator that applies a magnetic field to a fluid (fifth invention).

According to the tactile presentation having such a configuration, by applying a magnetic field to the magnetic viscous fluid in the fluid accommodating body, the tactile sensation according to the strength of the magnetic field when the fluid accommodating body of the tactile presenting portion is pressed with a fingertip or the like. (Load) can be presented. Further, the fluid accommodating body of the tactile presentation portion is pressed with a fingertip or the like, and a strong magnetic field of a certain level or more is applied to the magnetic viscous fluid in the fluid accommodating body in a state where the shape, thickness, etc. of the fluid accommodating body are changed. By doing so, the state of the shape, thickness, etc. of the fluid accommodating body can be maintained.

In the tactile presentation device according to the fourth or fifth aspect of the invention, in the magnetic field generator that applies a magnetic field to the magnetic viscous fluid in the fluid containing body, both ends of the fluid containing body that serve as magnetic poles are mutually attached. Provided so as to generate a magnetic field between the main yokes arranged to face each other, one or more relay yokes arranged via gaps between both ends of the main yoke, and both ends of the main yoke. It is preferable that the coil is provided (sixth invention).

According to the tactile presentation having such a configuration, the magnetic resistance of the magnetic circuit can be suppressed low by the relay yoke while securing the area of the fluid accommodating body (the area of the portion pressed by the fingertip or the like) to some extent.

The tactile presenting apparatus according to the first to sixth inventions is provided with a fluid absorbing unit that absorbs the volume of the fluid flowing out of the fluid accommodating body when the fluid accommodating body is pressed. It is preferable (7th invention).

According to the tactile presentation having such a configuration, the volume of the fluid flowing out from the fluid accommodating body when the fluid accommodating body of the tactile presenting portion is pressed is absorbed by the fluid absorbing portion, so that the fluid accommodating body of the tactile presenting portion is absorbed. The tactile sensation (load) when pressing with a fingertip or the like can be presented exclusively by the viscosity of the ferrofluid.

According to the tactile presentation device according to the present invention, by using the ferrofluid, it is possible to present a desired tactile sensation without requiring a complicated mechanism, structure, or the like in the portion for presenting the tactile sensation.

It is a top view which shows the tactile presentation apparatus which concerns on 1st Embodiment of this invention. It is BB sectional view of FIG. FIG. 1 is a cross-sectional view taken along the line AA of FIG. 3 is a sectional view taken along the line CC of FIGS. 3 and 5. FIG. However, the illustration of the object behind the cross section is omitted. It is sectional drawing which shows the tactile presentation apparatus which concerns on 2nd Embodiment of this invention. FIG. 5 (b) is an enlarged view of part D in FIG. 5 (a).

[First Embodiment]
Hereinafter, the tactile presentation device according to the first embodiment of the present invention will be described with reference to the drawings. As shown in FIGS. 1 to 3, the tactile presentation device 1 according to the present embodiment includes a tactile presentation unit 2, a fluid passage 3, a first magnetic field generator 4, a second magnetic field generator 5, and a ferrofluid 6. , The fluid absorption unit 8 and the like.

The tactile presentation unit 2 presents the tactile sensation when the user presses it with a fingertip or the like. The tactile presentation unit 2 is composed of a fluid accommodating body 7 accommodating the ferrofluid 6. As shown in FIG. 2, for example, the fluid accommodating body 7 is composed of a tactile surface layer 7a and a base layer 7b. The tactile surface layer 7a forms a tactile surface that the user presses with a fingertip or the like, and a thin and flexible material such as a silicon film is used for the tactile surface layer 7a. The base layer 7b is arranged on the back side of the tactile surface layer 7 via a magnetic viscous fluid 6, and a thin plate material such as a plastic plate is used for the base layer 7b. In the present embodiment, the base layer 7b and the tactile surface layer 7a have a rectangular shape in a plan view, and are joined to each other at the edge portion 7c to form a bag body. The plane size of the fluid container 7 is, for example, a rectangular shape having a side of 5 mm to 10 mm, and the entire surface of the fluid container 7 is pressed by a human fingertip. Not limited.

A predetermined support surface 11 for supporting the fluid accommodating body 7 from the back surface when the front surface of the fluid accommodating body 7 is pressed by a user's fingertip or the like is provided on the back side of the fluid accommodating body 7. The support surface 11 is composed of, for example, a member constituting the touch panel (for example, a touch panel switch sheet or the like).

The fluid passage 3 is connected to the fluid accommodating body 7, and when the fluid accommodating body 7 is pressed, the magnetic viscous fluid 6 flows into the fluid passage 3 from the fluid accommodating body 7. Further, when the pressure of the fluid accommodating body 7 is released, the magnetic viscous fluid 6 recirculates from the fluid passage 3 to the fluid accommodating body 7. The fluid passage 3 is formed of, for example, a pipe made of a non-magnetic material (for example, a resin pipe or the like). In the present embodiment, the fluid passage 3 is composed of the first to third fluid passages 3a to 3c. One ends of the first to third fluid passages 3a to 3c are connected to each other, the other end of the first fluid passage 3a is connected to one of the fluid accommodating bodies 7, and the other end of the second fluid passage 3b is fluid. It is connected to the other side of the accommodating body 7, and the other end of the third fluid passage 3c is connected to a fluid absorbing unit 8 described later.

The first magnetic field generator 4 applies a magnetic field to the magnetic viscous fluid 6 flowing through the fluid passage 3 (third fluid passage 3c). As shown in FIG. 4, for example, the first magnetic field generator 4 is composed of a yoke 4a, a coil 4b, a tube holding member 4c, and the like.

The yokes 4a are arranged so that both ends 4a1 and 4a2, which are magnetic poles, face each other with the fluid passage 3 interposed therebetween. When a current is applied to the coil 4b, a magnetic path is formed along the direction indicated by the arrow P, and a magnetic field in a direction orthogonal to the flow direction is applied to the magnetic viscous fluid 6 flowing through the fluid passage 3.

The pipe holding member 4c is formed so as to fill the gap between the yoke 4a, the fluid passage 3, and the coil, and is made of a non-magnetic material. The pipe holding member 4c holds the pipe forming the fluid passage 3 in the yoke 4a. An arbitrary current is supplied to the coil 4b from a current supply device (not shown).

The second magnetic field generator 5 applies a magnetic field to the magnetically viscous fluid 6 in the fluid accommodating body 7. As shown in FIGS. 1 to 3, the second magnetic field generator 5 includes a main yoke 5a, a coil 5b, a relay yoke 5c, and the like.

The main yoke 5a is formed by bending a rectangular flat plate made of a magnetic material, and both ends 5a1 and 5a2 are opposed to each other. As shown in FIG. 3, both ends 5a1 and 5a2 of the main yoke 5a are inserted into the inside through openings 7d formed at both ends of the fluid accommodating body 7, and magnetic magnetism is provided between the both ends 5a1 and 5a2. The viscous fluid 6 intervenes. The opening 7d of the fluid accommodating body 7 and the main yoke 5a are in close contact with each other without a gap so that the ferrofluid 6 does not leak from the fluid accommodating body 7.

The coil 5b is wound around an intermediate portion of the main yoke 5a. An arbitrary current is supplied to the coil 5b from a current supply device (not shown).

The relay yoke 5c is composed of a large number of wires arranged orthogonally to the magnetic path formed between both ends 5a1 and 5a2 of the main yoke 5a and parallel to the tactile surface of the fluid accommodating body 7. The relay yoke 5c is made of a magnetic material and plays a role of reducing the magnetic resistance of the magnetic circuit formed by the second magnetic field generator 5. When a current is applied to the coil 5b, a magnetic path is formed in the direction along the arrow Q (see FIG. 3), and the magnetic viscosity between both ends 5a1, 5a2 of the main yoke 5a and a large number of relay yokes 5c. A magnetic field is applied to the fluid 6. In the present embodiment, the relay yoke 5c is provided so as to penetrate the fluid accommodating body 7, and both ends are fixed to frames 9 and 10 made of a non-magnetic material such as stainless steel (see FIG. 1). In FIG. 3, the gaps between both ends 5a1, 5a2 of the main yoke 5a and each of the large number of relay yokes 5c are widely described, but in order to reduce the magnetic resistance, the gaps between the above should be as small as possible. desirable. Further, in the present embodiment, a wire rod having a circular cross section is used as the relay yoke 5c, but other wire rods such as a wire rod having a rectangular cross section can also be used.

The magnetic viscous fluid 6 is a liquid in which magnetic particles are dispersed in a dispersion medium, and in particular, those in which the magnetic particles are made of nano-sized metal particles (metal nanoparticles) can be used. The magnetic particles are made of a magnetizable metal material, and the metal material is not particularly limited, but a soft magnetic material is preferable. Examples of the soft magnetic material include alloys such as iron, cobalt, nickel and permalloy. The dispersion medium is not particularly limited, and examples thereof include hydrophobic silicone oil. The blending amount of the magnetic particles in the magnetically viscous fluid may be, for example, 3 to 40 vol%. It is also possible to add various additives to the ferrofluid in order to obtain various desired properties.

The fluid absorbing unit 8 absorbs the volume of the ferrofluid flowing out of the fluid accommodating body 7 when the fluid accommodating body 7 is pressed by a user's fingertip or the like. That is, when the fluid accommodating body 7 is pressed, the ferrofluid 6 flows out from the fluid accommodating body 7 to the fluid passage 3 as the internal volume thereof decreases, and the ferrofluid 6 in the fluid passage 3 absorbs the fluid. It flows into the part 8. When the fluid accommodating body 7 is not pressed, the fluid absorbing unit 8 is filled with a predetermined amount of ferrofluid 6 and contracts its internal volume so as to maintain a predetermined thickness and shape. A predetermined pressure is applied to the fluid passage 3. On the other hand, when the fluid accommodating body 7 is pressed and the pressure in the fluid passage 3 exceeds a predetermined pressure, the fluid absorbing unit 8 expands the internal volume to increase the volume of the magnetic viscous fluid 6 flowing out of the fluid accommodating body 7. Absorb. As the fluid absorbing unit 8 that operates as described above, for example, an accumulator can be used.

In the tactile presentation device 1 described above, when a current is applied to the coil 4b of the first magnetic field generator 4 by a current supply device (not shown) (a current is applied to the coil 5b of the second magnetic field generator 5). No), a magnetic path is formed in the yoke 4a along the direction indicated by the arrow P in FIG. 4, and the magnetic viscous fluid 6 interposed between both ends 4a1 and 4a2 of the yoke 4 has a viscosity corresponding to the strength of the magnetic field. (Sliding stress) develops. At this time, when the surface of the fluid accommodating body 7 (see FIG. 3) is pressed by the user's fingertip or the like, the magnetically viscous fluid 6 in the fluid passage 3 flows toward the fluid absorbing portion 8, but in the middle of the fluid passage 3. Since the magnetically viscous fluid 6 has a viscosity corresponding to the strength of the magnetic field, a flow resistance corresponding to the viscosity is generated in the entire fluid passage 3. This flow resistance is reflected as a reaction force when pressing the surface of the fluid accommodating body 7. In short, the tactile sensation (load) when the fluid accommodating body 7 is pressed by a fingertip or the like can be freely changed according to the current value applied to the coil 4b of the first magnetic field generator 4. When the user's fingertip or the like is separated from the surface of the fluid container 7 and the pressed state is released, the fluid absorbing unit 8 contracts the internal volume and returns the ferrofluid 6 to the fluid container 7, so that the fluid is magnetic. The shape, thickness, etc. of the fluid accommodating body 7 including the viscous fluid 6 are restored to the initial state.

Further, in the tactile presentation device 1, when a current is applied to the coil 5b of the second magnetic field generator 5 by the current supply device (not shown) (the current is not applied to the coil 4b of the first magnetic field generator 4). , A magnetic path is formed in the main yoke 5a along the direction indicated by the arrow Q in FIG. The viscosity (shear stress) according to the strength develops. At this time, when the surface of the fluid accommodating body 7 is pressed by a user's fingertip or the like, a force corresponding to the viscosity of the ferrofluid 6 in the fluid accommodating body 7 appears as a reaction force when pressing the fluid accommodating body 7. .. In short, the tactile sensation (load) when the fluid accommodating body 7 is pressed by a fingertip or the like can be freely changed according to the current value applied to the coil 5b of the second magnetic field generator 5.

Further, in a state where the surface of the fluid accommodating body 7 is pressed by a user's fingertip or the like and the shape, thickness, etc. of the fluid accommodating body 7 including the ferrofluid 6 are changed, the current value applied to the coil 5b is increased. By further increasing the viscosity of the ferrofluid 6 in the fluid container 7, it is possible to maintain the state of the fluid container 7 whose shape and thickness have changed. This is convenient, for example, when you want to leave a trace of the fluid container 7 being pushed. When the user's fingertip or the like is separated from the surface of the fluid accommodating body 7 and the pressed state is released and the current application to the coil 5b is stopped, the fluid absorbing unit 8 contracts the internal volume to accommodate the ferrofluid 6. The shape, thickness, and the like of the fluid accommodating body 7 including the ferrofluid 6 are restored to the initial state in order to return the fluid to the body 7.

Further, the tactile sensation (load) when the surface of the fluid accommodating body 7 is pressed by the user's fingertip or the like is controlled and adjusted only by the current value applied to the coil 4b of the first magnetic field generator 4, and the second The magnetic field generator 5 can also be used only for maintaining the state of the fluid accommodating body 7 whose shape, thickness, and the like have changed.

According to the tactile presentation device 1 described above, the current value applied to the coils 4b and 5b can be adjusted and controlled without requiring a complicated mechanism, structure, etc. for the tactile presentation unit 2 (fluid accommodating body 7). By doing so, the desired tactile sensation can be presented.

[Second Embodiment]
Hereinafter, the tactile presentation device according to the second embodiment of the present invention will be described with reference to FIG. The tactile presentation device 1A according to the second embodiment has, in the tactile presentation device 1 according to the first embodiment (see FIG. 3), in the first fluid passage 3a and the second fluid passage 3b, respectively. It is assumed that the pistons 12 and 13 that can move along the fluid passages 3a and 3b are fitted. Further, in the fluid passages 3a and 3b, the fluid accommodating body 7 side of the piston 12 (on the right side of the piston 12 in FIG. 5), the fluid accommodating body 7 side of the piston 13 (on the left side of the piston 13 in FIG. 5), and the fluid accommodating body. 7 is filled with a transparent or translucent liquid 14 (fluid other than the magnetic viscous fluid) instead of the magnetic viscous fluid. On the other hand, in the fluid passages 3a and 3b, the side opposite to the fluid accommodating body 7 side of the pistons 12 and 13 (on the left side of the piston 12 and the right side of the piston 13 in FIG. 5), and the third fluid passage 3c is filled with the ferrofluid 6. Has been done.

The pistons 12 and 13 are each movable along the fluid passage 3, and the ferrofluid 6 existing on one side and the transparent or translucent liquid 14 existing on the other side are prevented from mixing with each other. There is. That is, the pistons 12 and 13 are provided with a sealing material 15 that seals the gap between the inner surface of the pipe forming the fluid passage 3 and the pistons 12 and 13. In the example shown in FIG. 5, a sealing material 15 made of an O-ring is fitted in a peripheral groove formed in the piston. The movable range of one piston 12 is restricted within the predetermined range L1 of the first fluid passage 3a, and the movable range of the other piston 13 is restricted within the predetermined range L2 of the second fluid passage 3b. As a result, the transparent or translucent liquid 14 does not flow to the position where the magnetic field is applied by the first magnetic field generator 4.

In addition, in the tactile presentation device 1A according to the second embodiment, the tactile surface layer 7a and the base layer 7b of the fluid container 7 are made of a transparent or translucent material (the material itself is the same as that of the first embodiment). The point that the second magnetic field generator 5 is omitted, the point that the opening 7d of the fluid container 7 is eliminated, and the point that the fluid passage 3 is connected to both side surfaces of the fluid container 7. It is different from the tactile presentation device 1 according to the first embodiment. However, the connection position of the fluid passage 3 with respect to the fluid accommodating body 7 is not limited to the above, and may be the same as that of the first embodiment.

The portion of the tactile presentation device 1A according to the second embodiment other than the above-described configuration is the same as that of the tactile presentation device 1 according to the first embodiment. A similar configuration is designated by the same reference numerals as those of the first embodiment (FIG. 3) in FIG. 5, and the description thereof will be omitted.

In the tactile presentation device 1A according to the second embodiment, when a current is applied to the coil 4b of the first magnetic field generator 4 by a current supply device (not shown), both ends of the yoke 4 are as shown in FIG. Viscosity (slip stress) corresponding to the strength of the magnetic field is developed in the ferrofluid 6 interposed between the portions 4a1 and 4a2. At this time, when the surface of the fluid accommodating body 7 is pressed by the user's fingertip or the like, the liquid 14 flows out from the fluid accommodating body 7 and presses the ferrofluid 6 together with the pistons 12 and 13 in the fluid passages 3a and 3b. Move it. The ferrofluid 6 flows into the fluid absorption unit 8 through the third fluid passage 3c, but a magnetic field is applied in the middle of the fluid passage 3c, and the viscosity is developed according to the strength of the magnetic field. Flow resistance is generated in the entire fluid passage 3. This flow resistance is reflected as a reaction force when pressing the fluid accommodating body 7. In short, the tactile sensation (load) when the fluid accommodating body 7 is pressed by a fingertip or the like can be freely changed according to the current value applied to the coil 4b of the magnetic field generator 4. When the user's fingertip or the like is separated from the surface of the fluid accommodating body 7 and the pressed state is released, the fluid absorbing unit 8 contracts the internal volume and the ferrofluid 6 presses the pistons 12 and 13, and the piston is concerned. Since the liquids 12 and 13 press the liquid 14 and return it to the fluid container 7, the shape, thickness, and the like of the fluid container 7 containing the liquid 14 are restored to the initial state.

Further, according to the tactile presentation device 1A according to the second embodiment, the liquid 14 contained in the fluid accommodating portion 7 is transparent or translucent, and the tactile surface layer 7a and the base layer 7b of the fluid accommodating body 7 are also transparent. Alternatively, since it is translucent, it is possible to arrange a display board or the like that the user wants to see through on the back surface of the fluid accommodating portion 7 (between the fluid accommodating portion 7 and the support surface 11). In the tactile presentation device 1 according to the first embodiment, since the non-transparent color (black) ferrofluid 6 is contained in the fluid accommodating portion 7, a display board or the like is arranged on the back surface of the fluid accommodating portion 7. However, the display board and the like cannot be seen from the outside. However, according to the tactile presentation device 1A according to the second embodiment, it is possible.

[Other embodiments]
In the above-described embodiment, the volume of the ferrofluid 6 or the liquid 14 flowing out of the fluid container 7 is absorbed by the fluid absorption unit 8 made of an accumulator, but the fluid absorption unit 8 is limited to the one made of an accumulator. However, if the above action can be realized, a fluid absorbing unit made of other means may be used.

The present invention is applicable to, for example, a tactile presentation device that presents a tactile sensation obtained when a touch panel is pressed.

1,1A Tactile presentation device 2 Tactile presentation unit 3 Fluid passage 4 First magnetic field generator (a device that applies a magnetic field to the fluid flowing through the fluid passage)
6 Ferrofluid 7 Fluid containment
7a Tactile layer
7b base layer
11 Support surface

Claims (5)

A tactile presentation unit having a fluid container for accommodating a fluid,
A fluid passage connected to the fluid container and
A magnetic field generator that applies a magnetic field to the fluid flowing through the fluid passage,
Equipped with
The fluid accommodating body of the tactile presentation unit has a tactile surface layer pressed by a user with a fingertip, and a base layer arranged on the back side of the tactile surface layer via the fluid.
The tactile layer is made of a flexible material and is made of a flexible material.
When the fluid flows out from the fluid accommodating body to the fluid passage, the flow path cross-sectional area is reduced, and when the fluid flows into the fluid accommodating body from the fluid passage, the flow path cross-sectional area is expanded. In addition, the fluid passage is connected to a part of the fluid accommodating body.
The fluid passage includes a first fluid passage, a second fluid passage, and a third fluid passage.
One end of the first fluid passage, the second fluid passage, and the third fluid passage are connected to each other.
The other end of the first fluid passage is connected to one of the fluid containing bodies.
The other end of the second fluid passage is connected to the other end of the fluid containment.
The magnetic field generator applies a magnetic field to the fluid flowing through the third fluid passage, and applies a magnetic field to the fluid.
Any of the above fluids is a ferrofluid.
A tactile presentation device characterized by this. A tactile presentation unit having a fluid container for accommodating a fluid,
A fluid passage connected to the fluid container and
A magnetic field generator that applies a magnetic field to the fluid flowing through the fluid passage,
Equipped with
The fluid accommodating body of the tactile presentation unit has a tactile surface layer pressed by a user with a fingertip, and a base layer arranged on the back side of the tactile surface layer via the fluid.
The tactile layer is made of a flexible material and is made of a flexible material.
The fluid passage is formed by piping and is formed.
The fluid passage includes a first fluid passage, a second fluid passage, and a third fluid passage.
One end of the first fluid passage, the second fluid passage, and the third fluid passage are connected to each other.
The other end of the first fluid passage is connected to one of the fluid containing bodies.
The other end of the second fluid passage is connected to the other end of the fluid containment.
The magnetic field generator applies a magnetic field to the fluid flowing through the third fluid passage, and applies a magnetic field to the fluid.
Any of the above fluids is a ferrofluid.
A tactile presentation device characterized by this. In the tactile presentation device according to claim 1 or 2.
Further provided with a fluid absorbing section that expands the internal volume when the fluid containing body is pressed and absorbs the volume of the fluid flowing out of the fluid containing body.
The other end of the third fluid passage is connected to the fluid absorbing portion.
A tactile presentation device characterized by this. In the tactile presentation device according to claim 2,
A tactile presentation device characterized in that the tactile surface layer and the base layer are joined to each other at an edge portion to form a bag body. In the tactile presentation device according to any one of claims 1 to 4.
When the surface of the fluid container is pressed, a predetermined support surface for supporting the fluid container from the back surface is provided.
The tactile presentation device, characterized in that the support surface is made of a member constituting the touch panel .

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