CN113655878B - VR virtual interaction device - Google Patents

VR virtual interaction device Download PDF

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Publication number
CN113655878B
CN113655878B CN202110312178.XA CN202110312178A CN113655878B CN 113655878 B CN113655878 B CN 113655878B CN 202110312178 A CN202110312178 A CN 202110312178A CN 113655878 B CN113655878 B CN 113655878B
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bag
box
fixed
heat dissipation
release
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CN202110312178.XA
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CN113655878A (en
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蒙曦
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Guizhou University
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Guizhou University
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    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/011Arrangements for interaction with the human body, e.g. for user immersion in virtual reality
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/01Head-up displays
    • G02B27/017Head mounted
    • G02B27/0176Head mounted characterised by mechanical features
    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F1/00Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
    • G06F1/16Constructional details or arrangements
    • G06F1/20Cooling means
    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F2200/00Indexing scheme relating to G06F1/04 - G06F1/32
    • G06F2200/20Indexing scheme relating to G06F1/20
    • G06F2200/201Cooling arrangements using cooling fluid
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02DCLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D10/00Energy efficient computing, e.g. low power processors, power management or thermal management

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Human Computer Interaction (AREA)
  • Optics & Photonics (AREA)
  • Percussion Or Vibration Massage (AREA)
  • Massaging Devices (AREA)

Abstract

The invention discloses VR virtual interaction equipment, which comprises a lens, wherein a placement box is fixed at the front end of the lens, an annular release box is fixed at the rear end of the lens, a placement groove is formed in the upper end of the placement box in a penetrating manner, a compression bag is fixed in the placement groove, a heat absorption transfer mechanism is arranged on the side wall of the compression bag, a heat dissipation box is inserted into the inner wall of the release box, cooling liquid is filled in the heat dissipation box, and a heat utilization mechanism is arranged in the release box. The advantages are that: through setting up the compress tightly the bag to fill into the rheologic liquid that charges in the compress tightly the bag inside, make playback devices after putting into the placement case inside, will receive the promotion and press from both sides tightly at the in-process that electrorheological liquid solidification was expanded, and then make playback devices under the state that laminates with the camera lens is intact, keep stable, can not appear rocking and the condition of displacement, thereby guaranteed the stability of broadcast picture, effectively avoided user's giddiness, improve user's use experience.

Description

VR virtual interaction device
Technical Field
The invention relates to the technical field of dance teaching, in particular to VR virtual interaction equipment.
Background
With advances in science and technology and rapid social development, VR glasses, also called VR heads, are receiving more and more attention; the novel man-machine interaction method is obtained through computer technology and various sensors.
VR devices mainly guide users to feel a sense of being in a virtual environment, and the display principle is that left and right eye screens respectively display left and right eye images, and human eyes acquire the information with the difference to generate a stereoscopic impression in the brain.
One type of VR glasses is assembled, and is mainly used by installing playing equipment and matching with a screen of the playing equipment; this kind of equipment convenient to use, the application is extensive, especially in the teaching field, can let the experience person better be in the study environment, especially in dance teaching, can help user experience to carry out dance training in various environment, can help the user to overcome the psychological pressure that big stage brought, and help the user to learn new dance along with the mr, holistic effect is very showing, but current equipment is when using, playback devices basically adopts centre gripping formula installation, and dance study process user need constantly beat and swing, and simple elasticity centre gripping formula can't carry out good fixing to playback devices, playback devices inevitably appear certain displacement and relatively rock, result in the broadcast picture to appear rocking, thereby increase user's giddiness feel, lead to user experience relatively poor, especially in dance teaching that moves more, the more obvious of embodiment, therefore need a VR interaction device that can help dance teaching.
Disclosure of Invention
The invention aims to solve the problem of poor fixing effect of playing equipment in the prior art, and provides VR virtual interactive equipment.
In order to achieve the above purpose, the present invention adopts the following technical scheme: VR virtual interactive installation, including the camera lens, the front end of camera lens is fixed with settles the case, the rear end of camera lens is fixed with annular release case, the standing groove has been seted up in the upper end penetration of settling the case, the inside of standing groove is fixed with the compress tightly the bag, the lateral wall of compress tightly the bag is equipped with heat absorption transfer mechanism, the inner wall of release case is inserted and is equipped with the heat dissipation case, the inside packing of heat dissipation case has the coolant liquid, the inside of release case is equipped with heat utilization mechanism.
In the virtual interaction device of VR, the heat absorption transfer mechanism is including being fixed in a plurality of heat dissipation bags of compress tightly the bag lateral wall, two adjacent the heat dissipation bag all communicates through the connecting pipe, the lateral wall of settling tank is run through and is equipped with the transfer pipe with the inside intercommunication of heat dissipation bag, the outer wall of settling tank is fixed with the circulating pipe with the transfer pipe intercommunication, the both ends of circulating pipe run through the intercommunication with the both sides of release case respectively.
In the virtual interactive device of VR, the heat utilization mechanism is including running through the pressure hole of seting up in the release case lateral wall, the outer wall of release case be fixed with a plurality of massage bags of a plurality of pressure hole one-to-one, every the inner wall in pressure hole is all sealed sliding connection has the slide bar, the tip of slide bar is fixed with the pressure differential board, the pressure differential board passes through reset spring and is connected with the inner wall of release case.
In the VR virtual interaction device, electrorheological fluid is filled in the compression bag, diethyl ether solution is filled in the heat dissipation bag and the connecting pipe, two combination valves are arranged in the circulating pipe, and each combination valve consists of a one-way valve and a pressure valve.
In the VR virtual interaction device, one side of the pressure difference plate is a cambered surface, the other side of the pressure difference plate is a plane, cold area liquid is filled in the pressure hole, and the massage bag is made of elastic rubber materials.
Compared with the prior art, the invention has the advantages that:
1. according to the invention, the compression bag is arranged, and the charging rheological fluid is filled in the compression bag, so that the playing equipment can be pushed to be clamped in the process of solidifying and expanding the electrorheological fluid after being placed in the placement box, and the back and the side wall of the playing equipment are wrapped by the deformable compression bag, so that the playing equipment is kept stable in a state of being well attached to the lens, and the situation of shaking and displacement cannot occur, thereby ensuring the stability of a playing picture, effectively avoiding dizziness of a user and improving the use experience of the user;
2. according to the invention, the plurality of heat dissipation bags are arranged on the surface of the compression bag, when the compression bag is tightly attached to the playing equipment, the heat dissipation bags are extruded to be attached to the playing equipment, and the diethyl ether solution is filled in the heat dissipation bags, so that when the playing equipment heats after long-time use, the heat can be absorbed more quickly and comprehensively, the playing equipment is not influenced by the excessive temperature, and the service life of the playing equipment is prolonged;
3. according to the invention, the release box is arranged, high temperature is introduced into the release box after diethyl ether absorbs heat and is gasified, and then the diethyl ether is liquefied by absorbing heat by cold area liquid, so that diethyl ether can be recycled, continuous heat absorption is realized, the valve combination is arranged in the circulation pipe, unidirectional flow of diethyl ether is ensured, and the diethyl ether can be better diffused and reflowed in the release box through the arrangement of the positions and the heights of the two ends of the circulation pipe, so that continuous and smooth heat dissipation circulation is ensured;
4. according to the invention, the diethyl ether is in a high-speed flowing state when entering the release box through the pressure valve of the equipment in the circulating pipe, and the shapes of the two sides of the pressure difference plate are different, so that when diethyl ether flows at a high speed, a certain air pressure difference exists at the two sides of the pressure difference plate, and then the pressure difference plate reciprocates under the action of the return spring, so that the massage bag is continuously expanded and contracted, the eyes of a user are massaged, and the fatigue of wearing the glasses for a long time is relieved.
Drawings
Fig. 1 is a schematic structural diagram of a VR virtual interactive device according to the present invention;
fig. 2 is a top view of a VR virtual interactive apparatus according to the present invention;
fig. 3 is a side cross-sectional view of a VR virtual interactive apparatus in accordance with the present invention;
fig. 4 is a partial enlarged view of the interior of the release box in the VR virtual interactive apparatus of the present invention.
In the figure: 1 lens, 2 placement boxes, 3 release boxes, 4 placement grooves, 5 compression bags, 6 heat dissipation bags, 7 connecting pipes, 8 transfer pipes, 9 circulating pipes, 10 heat dissipation boxes, 11 return springs, 12 differential pressure plates, 13 compression holes, 14 sliding rods and 15 massage bags.
Detailed Description
The following examples are for illustrative purposes only and are not intended to limit the scope of the invention.
Examples
Referring to fig. 1-4, vr virtual interactive apparatus, including lens 1, the front end of lens 1 is fixed with and settles case 2, and the rear end of lens 1 is fixed with annular release case 3, and standing groove 4 has been seted up in the upper end penetration of settling case 2, and the inside of standing groove 4 is fixed with compressing tightly bag 5, and the lateral wall of compressing tightly bag 5 is equipped with heat absorption transfer mechanism, and release case 3's inner wall has inserted radiating case 10, and radiating case 10 inside is filled with the coolant liquid, and release case 3's inside is equipped with heat utilization mechanism.
The heat absorption transfer mechanism comprises a plurality of heat dissipation bags 6 fixed on the side wall of the compression bag 5, two adjacent heat dissipation bags 6 are communicated through a connecting pipe 7, a transfer pipe 8 communicated with the inside of the heat dissipation bag 6 is inserted through the side wall of the placement box 2, a circulating pipe 9 communicated with the transfer pipe 8 is fixed on the outer wall of the placement box 2, two ends of the circulating pipe 9 are respectively communicated with two sides of the release box 3 in a penetrating mode, one ends of the two ends of the circulating pipe 9 are used for releasing gas into the release box 3, one ends of the two ends of the circulating pipe 9 are used for recycling, and therefore the two ends of the circulating pipe 9 are respectively located at the diagonal positions of the release box 3, and the position of an air inlet end is higher, so that liquefaction and recycling are facilitated.
The heat utilization mechanism comprises pressing holes 13 penetrating through the side wall of the release box 3, a plurality of massage bags 15 corresponding to the pressing holes 13 one by one are fixed on the outer wall of the release box 3, sliding rods 14 are connected to the inner wall of each pressing hole 13 in a sealing sliding mode, a pressure difference plate 12 is fixed to the end portion of each sliding rod 14, and the pressure difference plate 12 is connected with the inner wall of the release box 3 through a reset spring 11.
The interior of the compression bag 5 is filled with electrorheological fluid, the electrorheological fluid is solidified and is accompanied by certain expansion after being electrified, and the compression bag 5 which is feasible in cooperation can realize compression and wrapping of playing equipment, so that the playing equipment cannot shake and displace, the stability of the playing equipment is ensured, playing pictures are stable, diethyl ether solution is filled in the heat dissipation bag 6 and the connecting pipe 7, the heat absorption is easy to gasify, two combination valves are arranged in the circulating pipe 9 and are respectively positioned at two sides of the connecting pipe 7, each combination valve consists of a one-way valve and a pressure valve, diethyl ether can realize one-way circulation flow in the circulating pipe 9 and the releasing box 3, and the pressure valve can realize control of releasing pressure, so that the flow rate of diethyl ether gas is ensured.
The pressure difference plate 12 is provided with a cambered surface on one side and a plane on the other side, so that when air flows through the pressure difference plate 12, flow velocity difference is formed on the two sides of the pressure difference plate, and then according to Bernoulli's law, pressure difference is formed on the two sides of the pressure difference plate 12, the pressure difference plate 12 moves under the action of the pressure difference, cold area liquid is filled in the pressure hole 13, heat absorption heat keeps the massage bag 15 cool, the massage bag 15 is made of elastic rubber materials, the massage bag is flexible and flexible, the face of a user is not damaged, and a good massage effect can be achieved.
In the invention, when in use, firstly, the playing equipment such as a mobile phone and the like is placed into the placement box 2 through the placement groove 4, then the position of the playing equipment is finely adjusted, and then the electrorheological fluid is electrified to solidify and expand to a certain extent, so that the compression bag 5 expands and the playing equipment is tightly attached, the playing equipment is tightly pressed and fixed, the compression bag 5 can reasonably wrap the playing equipment according to the specific size of the playing equipment, so that the playing equipment is comprehensively fixed, the electrorheological fluid is solid after being electrified and solidified, and elastic deformation can not occur any more, so that the playing equipment is not deviated from the lens 1 in position after being fixed, thereby avoiding shaking and displacement of the playing equipment in the use process, ensuring that the displayed picture is more stable, avoiding dizziness of users to a certain extent, improving the experience effect of users, and being convenient and labor-saving as long as the playing equipment is powered off when being taken down;
when the compression bag 5 deforms to be attached to the playing equipment, the heat dissipation bag 6 on the compression bag moves along with the compression bag to be attached to the back of the playing equipment tightly, so that diethyl ether in the heat dissipation bag 6 can be better close to the player to absorb heat of the playing equipment, when the temperature of the playing equipment is increased in the using process of the playing equipment, diethyl ether solution absorbs the heat emitted by the playing equipment, and therefore the playing equipment cannot be overheated and damaged due to long-time use, and the service life of the playing equipment is effectively prolonged;
the diethyl ether solution is gasified after absorbing heat, so that high Wen Yimi gas moves into the circulation pipe 9 through the transfer pipe 8 and is accumulated, when the diethyl ether amount reaches a certain value, the air pressure in the circulation pipe 9 is increased, so that a large amount of diethyl ether gas breaks through the pressure valve and is rapidly sprayed out, enters the inside of the release box 3 and rapidly flows in the release box 3, so that the heat on the diethyl ether solution is absorbed by cooling liquid in the heat dissipation box 10, is further liquefied and finally enters the circulation pipe 9 from the other end of the circulation pipe 9, and as the air pressure in the heat dissipation bag 6 is reduced, the liquefied diethyl ether is returned into the heat dissipation bag 6 through the transfer pipe 8 again, and heat is intensively absorbed again, so that a circulating heat absorption and release process is formed, and the playing equipment can continuously and effectively dissipate heat and cool;
when a large amount of diethyl ether gathered enters the release box 3, diethyl ether flows at a high speed in the release box 3, so that pressure difference is generated at two sides of the pressure difference plate 12 in the process of diethyl ether flowing at a high speed, as the flow of diethyl ether is not constant in flow speed and flow rate, the pressure difference exists at two sides of the pressure difference plate 12 all the time, and the difference value is continuously changed, so that the pressure difference plate 12 continuously reciprocates under the combined action of the pressure difference and the reset spring 11, and further the sliding rod 14 is driven to slide in the pressure hole 13 in a reciprocating manner, so that the massage bag 15 circularly changes between expansion and contraction, thereby realizing the massage on eyes of a user, and cold area liquid in the pressure hole 13 can keep a cool massage environment, and a more comfortable massage effect can be achieved when the user moves.
The foregoing description of the preferred embodiments of the invention is not intended to limit the invention to the precise form disclosed, and any such modifications, equivalents, and alternatives falling within the spirit and scope of the invention are intended to be included within the scope of the invention.

Claims (4)

  1. Virtual interactive device of VR, including camera lens (1), its characterized in that, the front end of camera lens (1) is fixed with and settles case (2), the rear end of camera lens (1) is fixed with annular release case (3), the upper end of settling case (2) runs through and has seted up standing groove (4), the inside of standing groove (4) is fixed with compress bag (5), the lateral wall of compress bag (5) is equipped with heat absorption transfer mechanism, the inner wall of release case (3) is inserted and is equipped with heat dissipation case (10), heat dissipation case (10) inside is filled with the coolant liquid, the inside of release case (3) is equipped with heat utilization mechanism;
    the heat utilization mechanism comprises a pressing hole (13) penetrating through the side wall of the release box (3), a plurality of massage bags (15) corresponding to the pressing holes (13) one by one are fixed on the outer wall of the release box (3), sliding rods (14) are connected to the inner walls of the pressing holes (13) in a sealing sliding mode, pressure difference plates (12) are fixed at the end portions of the sliding rods (14), and the pressure difference plates (12) are connected with the inner walls of the release box (3) through reset springs (11).
  2. 2. The VR virtual interactive apparatus according to claim 1, characterized in that the heat absorbing transfer mechanism comprises a plurality of heat dissipation bags (6) fixed on the side wall of the compression bag (5), two adjacent heat dissipation bags (6) are all communicated through a connecting pipe (7), a transfer pipe (8) communicated with the inside of the heat dissipation bag (6) is inserted through the side wall of the placement box (2), a circulating pipe (9) communicated with the transfer pipe (8) is fixed on the outer wall of the placement box (2), and two ends of the circulating pipe (9) are respectively communicated with two sides of the release box (3) in a penetrating manner.
  3. 3. The VR virtual interactive apparatus of claim 2, wherein electrorheological fluid is filled in the compression bag (5), diethyl ether solution is filled in the heat dissipation bag (6) and the connecting pipe (7), two combination valves are arranged in the circulating pipe (9), and each combination valve consists of a one-way valve and a pressure valve.
  4. 4. The VR virtual interactive apparatus as set forth in claim 3, wherein one side of the differential pressure plate (12) is a cambered surface and one side is a plane, the inside of the pressure hole (13) is filled with cold zone liquid, and the massage bladder (15) is made of an elastic rubber material.
CN202110312178.XA 2021-03-24 2021-03-24 VR virtual interaction device Active CN113655878B (en)

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CN113655878B true CN113655878B (en) 2023-10-31

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Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114469505A (en) * 2022-02-10 2022-05-13 郭芯雨 Vision correction instrument

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106932905A (en) * 2017-02-27 2017-07-07 阿里巴巴集团控股有限公司 Virtual reality helmet
CN212181174U (en) * 2020-06-24 2020-12-18 周武 VR glasses that heat dissipation is good
CN112429133A (en) * 2020-10-27 2021-03-02 黄李娜 Shockproof and anti-falling stopwatch for bicycle
CN112511681A (en) * 2020-12-08 2021-03-16 义乌安师贸易有限公司 Cell-phone box head that installation stability is good shows
CN112526753A (en) * 2020-12-08 2021-03-19 义乌超德贸易有限公司 VR head display equipment capable of adjusting lens spacing

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10416735B2 (en) * 2017-10-10 2019-09-17 Google Llc Heat pipe thermal component for cooling system

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106932905A (en) * 2017-02-27 2017-07-07 阿里巴巴集团控股有限公司 Virtual reality helmet
CN212181174U (en) * 2020-06-24 2020-12-18 周武 VR glasses that heat dissipation is good
CN112429133A (en) * 2020-10-27 2021-03-02 黄李娜 Shockproof and anti-falling stopwatch for bicycle
CN112511681A (en) * 2020-12-08 2021-03-16 义乌安师贸易有限公司 Cell-phone box head that installation stability is good shows
CN112526753A (en) * 2020-12-08 2021-03-19 义乌超德贸易有限公司 VR head display equipment capable of adjusting lens spacing

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