CN215006599U - Tactile feedback device - Google Patents
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- CN215006599U CN215006599U CN202121455400.3U CN202121455400U CN215006599U CN 215006599 U CN215006599 U CN 215006599U CN 202121455400 U CN202121455400 U CN 202121455400U CN 215006599 U CN215006599 U CN 215006599U
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Abstract
The invention discloses a tactile feedback device which comprises a tactile feedback unit, an electric field control unit and a pressure generation unit, wherein the tactile feedback unit comprises a touch layer made of a flexible soft material film, a tactile feedback differential unit with a honeycomb-shaped through hole structure and a liquid cavity with a pressure conveying hole, the tactile feedback layer, the tactile feedback differential unit and the liquid cavity with the pressure conveying hole form an integral structure with a closed cavity inside, the tactile feedback layer and the liquid cavity are respectively bonded on the upper surface and the lower surface of the tactile feedback differential unit in a sealing mode, the side wall of the through hole of the tactile feedback differential unit is provided with an electrode, and electrorheological liquid is filled in the closed cavity. The pressure generating unit is hermetically connected with the tactile feedback unit through the pressure conveying hole, and the electric field control unit is respectively connected with the electrodes positioned in the tactile feedback differential unit. The invention can drive a plurality of tactile feedback points to feed back simultaneously by using a single pressure source; through voltage control, easy operation, response speed is fast to hardness and shape feedback can be realized simultaneously, the feedback mode is abundant true.
Description
Technical Field
The invention relates to the field of tactile feedback, in particular to a novel structure and a control system for realizing hardness feedback and shape feedback by electric control.
Background
At present, scene reconstruction of virtual reality and augmented reality is mainly spread around human visual and auditory senses, and information feedback and interaction on higher dimensionality are lacked. The development of the tactile feedback technology builds a bridge for the mechanical interaction between a virtual object and a human, and is expected to become a key technology breakthrough for the development of virtual reality application.
The tactile feedback technology can optimize virtual reality experience and broaden the application field of virtual reality. The touch feedback technology can enable a user to carry out deeper interactive application with a virtual world, expand the perception dimensionality of virtual reality experience, obtain stronger immersion, create a more vivid and comprehensive virtual-real fusion environment, and further generate more innovative applications in games, intelligent manufacturing, educational training and high-risk industries.
Haptic feedback technology can reproduce a sense of touch for a user through a series of actions such as force, vibration, etc. As one of important channels of human-computer interaction, the force touch signal can provide richer information such as materials and textures for a user, assist the user in perceiving the change of a physical environment in the interaction, provide effective force feedback information for a training task in virtual reality, help the user to standardize the behavior of the user, provide richer and real telepresence for tasks such as remote control operation and the like, and have important application in the fields of rehabilitation medicine, surgical training, virtual reality, remote operation and the like.
At present, most of the tactile feedback devices still mainly use vibration and force feedback of rigid devices, the feedback reality provided by the device is low, although a few of the tactile feedback devices are made of flexible materials, the device is complex, most of the tactile feedback devices are single-unit force feedback devices, and the shape information of an object cannot be fed back in real time.
Disclosure of Invention
The invention aims to provide a tactile feedback device which overcomes the defects of insufficient feedback reality degree and slow response time of the conventional tactile feedback device and realizes the feedback of physical strength, hardness and shape when an object is touched.
The invention achieves the purpose through the following technical scheme, and the tactile feedback device comprises a tactile feedback unit, an electric field control unit and a pressure generation unit, wherein the tactile feedback unit comprises a touch layer made of a flexible soft material film, a tactile feedback differential unit with a honeycomb-shaped through hole structure and a liquid cavity with a pressure conveying hole, the tactile feedback unit, the tactile feedback differential unit and the liquid cavity with the pressure conveying hole form an integral structure with a closed cavity inside, the tactile feedback layer and the liquid cavity with the pressure conveying hole are respectively bonded on the upper surface and the lower surface of the tactile feedback differential unit in a sealing mode, the side wall of the through hole of the tactile feedback differential unit is provided with an electrode, and electrorheological liquid is filled in the closed cavity. The pressure generating unit is hermetically connected with the tactile feedback unit through a pressure conveying hole, and the electric field control unit is respectively connected with electrodes positioned in the tactile feedback differential unit.
On the basis of the scheme, the invention can also have the following further improvement scheme.
The tactile feedback unit may also be configured such that the touch layer is located in an intermediate layer, and the tactile feedback differential unit and the fluid chamber are located in an upper layer and a lower layer of the touch layer, respectively.
Further, the electrodes arranged inside the haptic feedback differential unit may be distributed circumferentially or symmetrically, and the electrodes may be in the shape of a needle or a sheet.
Furthermore, the shape of the through hole on the tactile feedback differential unit can be a polygonal structure such as a square, a triangle and the like.
The touch layer can be a three-layer structure, and comprises an upper layer and a lower layer of deformable materials adhered with flexible electrodes and a middle layer cavity structure. The interior of the cavity is filled with electrorheological fluid.
Compared with the prior art, the tactile feedback device provided by the invention has the beneficial technical effects that:
(1) the structure is simple, the volume is small and thin, and the arrangement, the processing and the manufacture are easy;
(2) a single pressure source can be used to drive multiple tactile feedback points for simultaneous feedback;
(3) through voltage control, easy operation, response speed is fast.
(4) The hardness and shape feedback can be realized simultaneously, and the feedback mode is rich and real.
Drawings
FIG. 1 is a schematic view of a haptic feedback device of the present invention.
Fig. 2 is an exploded view of the overall structure of the haptic feedback unit.
FIG. 3 is a diagram of a tactile feedback unit pin electrode arrangement.
FIG. 4 is a tactile feedback unit ring electrode arrangement.
Fig. 5 is a tactile feedback unit patch electrode layout.
Fig. 6 is a functional diagram of the haptic feedback unit.
Fig. 7 is a diagram showing a structure of a touch layer.
Fig. 8 is a diagram showing the arrangement structure of electrodes of the touch layer.
Fig. 9 is a cross-sectional view of another haptic feedback unit configuration.
In the figure: 1-touch layer, 2-tactile feedback differential unit, 3-liquid cavity, 4-needle electrode, 5-annular electrode, 6-sheet electrode, 7-electrorheological fluid, 8-electrorheological fluid under the action of electric field, 9-electrorheological fluid without the action of electric field, and 10-flexible electrode.
Detailed Description
The invention discloses a tactile feedback device, which is shown in figures 1 to 3 and comprises a tactile feedback unit, an electric field control unit and a pressure generation unit, wherein the tactile feedback unit is shown in figure 2 and comprises a touch layer 1, a tactile feedback differential unit 2 and a liquid cavity 3. The electric field control unit consists of symmetrical electrodes arranged on the sides of the honeycomb-shaped through holes in the tactile feedback differential unit and a corresponding control circuit. The pressure generating unit is any device capable of providing pressure. The touch layer 1 is located the uppermost layer, the tactile feedback differential unit 2 is located the touch layer 1 lower floor to with touch layer sealing bonding, the liquid chamber 3 is located the tactile feedback differential unit 2 lower floor, and with the differential unit 2 sealing bonding of data volume feedback, the pressure generating unit passes through pressure delivery hole sealing connection with the tactile feedback unit that fig. 2 shows, electric field control unit and electrode connection form corresponding control circuit, and the type of electrode has the multiple, and fig. 3 is the arrangement of tactile feedback unit needle electrode 4, and fig. 4 is the arrangement of tactile feedback unit cyclic annular electrode 5, and fig. 5 is the arrangement of tactile feedback unit slice electrode 6.
The touch layer 1 may have a three-layer structure, in which the flexible electrode 10 shown in fig. 7 is embedded in the touch layer 1, the center of the touch layer 1 is a cavity structure, and electrorheological fluid is injected into the cavity structure.
The three-layer structure of the touch layer 1 may also be that the flexible electrode 10 shown in fig. 8 is adhered to the inner wall of a hollow cavity of the touch layer 1, and an electrorheological liquid is injected into the hollow cavity.
The touch layer 1 may be a flexible material such as a plastic film or a silicone film. The electrodes may be the sheet electrodes shown in fig. 5 and 6 and the needle electrodes shown in fig. 9.
The invention discloses a tactile feedback device, the principle of realizing feedback is shown in figure 6, a single pressure generating unit pushes an electrorheological fluid 7 to flow through a cavity of each tactile feedback point, the tactile feedback points realize protrusion under the action of the pressure of the electrorheological fluid 7 to achieve the purpose of force feedback, sheet electrodes 6 are arranged on the side of each tactile feedback point cavity, a control circuit is used for respectively electrifying each pair of sheet electrodes 6, electric fields with different field intensity are formed in each tactile feedback point cavity, the flowability of the electrorheological fluid flowing through each tactile feedback point cavity is changed by controlling the size of the electric fields to transmit different pressures, and the purpose of realizing protrusion with different heights on different tactile feedback points is achieved. The flexible electrode 10 in the touch layer 1 shown in fig. 7 is electrified to convert the electro-rheological fluid 7 in the cavity of the first tactile feedback differential unit 1 into a solid state, so as to realize hardness feedback.
Claims (5)
1. A haptic feedback device, characterized by: the touch control device comprises a touch feedback unit, an electric field control unit and a pressure generation unit, wherein the touch feedback unit comprises a touch layer made of a flexible soft material film, a touch feedback differential unit with a honeycomb-shaped through hole structure and a liquid cavity with a pressure conveying hole, the touch feedback layer, the touch feedback differential unit and the liquid cavity with the pressure conveying hole form an integral structure with a closed cavity inside, the touch feedback layer and the liquid cavity are respectively bonded to the upper surface and the lower surface of the touch feedback differential unit in a sealing mode, electrodes are arranged on the side wall of the through hole of the touch feedback differential unit, and electrorheological liquid is filled in the closed cavity; the pressure generating unit is hermetically connected with the tactile feedback unit through a pressure conveying hole, and the electric field control unit is respectively connected with electrodes positioned in the tactile feedback differential unit.
2. A haptic feedback device as recited in claim 1 wherein: the touch layer is located in the middle layer, and the tactile feedback differential unit and the liquid cavity are located in the upper layer and the lower layer of the touch layer respectively.
3. A haptic feedback device as recited in claim 1 wherein: the electrodes are distributed in a circumferential or symmetrical way, and the shape of the electrodes can be needle-shaped or sheet-shaped.
4. A haptic feedback device as recited in claim 1 wherein: the shape of the through hole is square or triangular.
5. A haptic feedback device as recited in claim 1 wherein: the three-layer structure comprises an upper layer of deformable material and a lower layer of deformable material, wherein the deformable material is stuck with a flexible electrode, and a middle layer cavity structure, and electrorheological fluid is injected into the cavity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121455400.3U CN215006599U (en) | 2021-06-29 | 2021-06-29 | Tactile feedback device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121455400.3U CN215006599U (en) | 2021-06-29 | 2021-06-29 | Tactile feedback device |
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| Publication Number | Publication Date |
|---|---|
| CN215006599U true CN215006599U (en) | 2021-12-03 |
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| CN202121455400.3U Active CN215006599U (en) | 2021-06-29 | 2021-06-29 | Tactile feedback device |
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| CN (1) | CN215006599U (en) |
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2021
- 2021-06-29 CN CN202121455400.3U patent/CN215006599U/en active Active
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