CN208387165U - A kind of VR glasses with heat sinking function - Google Patents

A kind of VR glasses with heat sinking function Download PDF

Info

Publication number
CN208387165U
CN208387165U CN201820967303.4U CN201820967303U CN208387165U CN 208387165 U CN208387165 U CN 208387165U CN 201820967303 U CN201820967303 U CN 201820967303U CN 208387165 U CN208387165 U CN 208387165U
Authority
CN
China
Prior art keywords
heat radiation
radiation rack
heat
mobile phone
exhaust fan
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN201820967303.4U
Other languages
Chinese (zh)
Inventor
马宁宁
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Qingdao Daoyuan Zhongsheng Innovation Technology Co Ltd
Original Assignee
Qingdao Daoyuan Zhongsheng Exhibition Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Qingdao Daoyuan Zhongsheng Exhibition Co Ltd filed Critical Qingdao Daoyuan Zhongsheng Exhibition Co Ltd
Priority to CN201820967303.4U priority Critical patent/CN208387165U/en
Application granted granted Critical
Publication of CN208387165U publication Critical patent/CN208387165U/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Abstract

A kind of VR glasses with heat sinking function, it is related to VR equipment technical field, including lens body, mobile phone placed cavity and viewing chamber are provided in lens body, mobile phone placed cavity is provided with the first heat radiation rack, first heat radiation rack is that the first thermal hole is distributed on hollow structure and the inner wall of the first heat radiation rack, and the lateral wall of the first heat radiation rack is equipped with the first row stomata being in communication with the outside, and the port position of first row stomata is equipped with first exhaust fan;Viewing chamber is provided with the second heat radiation rack, second heat radiation rack is that the second thermal hole is distributed on hollow structure and the inner wall of the second heat radiation rack, the lateral wall of second heat radiation rack is equipped with the second row stomata being in communication with the outside, the port position of second row stomata is equipped with second exhaust fan, it is additionally provided with gas-guide tube on second heat radiation rack, is connected to inside gas-guide tube one end and the second heat radiation rack and the edge of eyeglass is arranged in the other end.The utility model energy ventilation and heat guarantees the airtightness inside VR glasses, while not influencing the viewing impression of user.

Description

A kind of VR glasses with heat sinking function
Technical field
The utility model relates to VR equipment technical fields, and in particular to a kind of VR glasses with heat sinking function.
Background technique
VR glasses are by people to generating feeling on the spot in person in virtual environment after the extraneous sense of hearing and visibility occlusions A kind of head-mounted display apparatus, VR glasses need to form closed lighttight space around vision when wearing, and mobile phone is placed Operation can generate heat in sealing space, therefore for a long time after wearing, four weekly assemblies of eyes perspire, generate sultry feeling, Experience sense decline, in order to solve the problems, such as that eye is sultry nonventilated, existing solution has:
1. ventilation opening and extraneous progress air exchange are arranged on the side wall of VR glasses, reach the work that heat dissipation ventilation perspires With, but ventilation opening has been easy natural light and has been shining into, and influences the viewing imaging of VR glasses, image quality is made to be deteriorated.
2. fan is arranged in VR glasses to radiate, while viewing fan to the intracavitary conveying outside air of viewing, It radiates from achieving the purpose that ventilate, the distance between eyeglass and the eyeball of user close, the installation of fan when VR glasses use Positional distance eyeball is closer, and it is uncomfortable to will cause xerophthalmia to eyes blow-through for a long time, and user's experience sense is deteriorated;This appearance Shadow chamber and mobile phone placed cavity are usually separated by eyeglass, and when mobile phone uses overlong time adstante febre, the heat around mobile phone is still It cannot timely evacuate, so that eyeglass both sides generate the temperature difference, easily condense water mist in lens surface, influence the viewing body of user It tests.
Summary of the invention
In order to solve above-mentioned problem of the prior art, the utility model provides a kind of VR glasses with heat sinking function, energy While ventilation and heat, guarantee the airtightness inside VR glasses, while not influencing the viewing impression of user.
The purpose of this utility model can be realized by the following technical scheme: a kind of VR glasses with heat sinking function, packet Lens body is included, mobile phone placed cavity and viewing chamber are provided in lens body, between the mobile phone placed cavity and the viewing chamber It is provided with eyeglass, the mobile phone placed cavity is provided with first heat radiation rack of circle along inner wall, and first heat radiation rack is hollow structure And several first thermal holes are distributed on the inner wall of first heat radiation rack, the lateral wall of first heat radiation rack be equipped with The first row stomata of external world's connection, the port position of the first row stomata are equipped with first exhaust fan, and the first exhaust fan is solid Surely it is connected on the side wall of the mobile phone placed cavity;The front opening of the viewing chamber and the edge of opening be equipped with wear Frame, the viewing chamber are provided with second heat radiation rack of circle along inner wall, and second heat radiation rack is hollow structure and described second It is distributed with several second thermal holes on the inner wall of heat radiation rack, the lateral wall of second heat radiation rack is equipped with the to be in communication with the outside Two gas vents, the port position of the second row stomata are equipped with second exhaust fan, and the second exhaust fan is fixedly connected on described On the side wall of viewing chamber, it is additionally provided with gas-guide tube on second heat radiation rack, in described gas-guide tube one end and second heat radiation rack The edge of the eyeglass is arranged in portion's connection and the other end.
Preferably, first heat radiation rack is equipped with heat-transfer device, and the heat-transfer device is fixedly connected on described first and dissipates On one circle inner sidewall of hot frame;Mobile phone is placed in mobile phone placed cavity and fixed, heat-transfer device around mobile phone surrounding, by mobile phone The heat generated in playing process quickly absorbs, by heat rapid aggregation around the first thermal hole, and can be by partial heat It is directly conducted on the first heat radiation rack, heat is discharged to the external world by the first heat radiation rack.
Preferably, the heat-transfer device includes several thermally conductive sheets, is arranged in parallel between the adjacent thermally conductive sheet, and described For thermally conductive sheet perpendicular to the inner sidewall of first heat radiation rack, first thermal hole is distributed in the seam between the adjacent thermally conductive sheet In gap;While on the heat that thermally conductive sheet generates mobile phone quick Assimilation and conductivity to the first heat radiation rack, the first thermal hole energy and When siphon away heat between two thermally conductive sheets in space, accelerate the air flowing in mobile phone placed cavity, reach the function to radiate in time Energy.
Preferably, second heat radiation rack is bonded the position punishment for wearing frame and is furnished with a circle second thermal hole; It wears frame directly to contact with the fitting of the surface of face, joint place is easily because of the intracavitary sultry aggregation sweat of viewing, along the profile for wearing frame One the second thermal hole of circle of setting, quickly by the heat absorption of face joint place and can be discharged to the external world, keep the dry of face joint place It is dry and pleasant.
Preferably, the quantity of the gas-guide tube is four, and the edge of each eyeglass is respectively arranged two gas-guide tubes.
Preferably, one layer of cushion is coated on the outer for wearing frame;It is more bonded face when wearing, makes to wear more It is comfortable.
The use principle of the utility model is: after user wears VR glasses, mobile phone is mounted in mobile phone placed cavity, Thermally conductive sheet is centered around the surrounding of mobile phone, while a side of thermally conductive sheet is close to eyeglass;Open first exhaust fan and second exhaust Fan:
Firstly, thermally conductive sheet absorbs the heat generated when mobile phone plays, by the heat in mobile phone placed cavity in mobile phone placed cavity Amount quickly concentrates near the first heat radiation rack inner sidewall, when first exhaust fan operating, by the first thermal hole by heat Mobile phone placed cavity is detached from the hollow structure of the first heat radiation rack, and is discharged to outside VR glasses by first exhaust fan, while thermally conductive sheet It is connected directly between on the inner sidewall of the first heat radiation rack, a part of heat can also be passed to the first heat radiation rack, and pass through first row Gas fan is discharged to outside VR glasses;
Secondly, intracavitary in viewing, it is intracavitary that the skin around glasses is sealed in viewing, when second exhaust fan operates, The intracavitary damp and hot air of viewing is detached into viewing chamber from the hollow structure of the second heat radiation rack by the second thermal hole, and along pendant The profile for wearing frame is nearby equipped with second thermal hole of circle, and the heat of face joint place is detached in time, keeps face joint place It is dry, in addition, the end of heat conducting pipe extends to the edge of eyeglass, the heat in eyeglass surrounding air can be detached in time, keep mirror Drying around piece.
Resultant effect brought by the utility model includes:
1, the utility model simple structure is reasonable, easy to use, and first exhaust fan and second exhaust fan are dissipated with first respectively The connection of the hollow structure of hot frame and the second heat radiation rack, is distributed several thermal holes on the inner sidewall of two heat radiation racks, in VR glasses Two chambers in the heat that generates pass through corresponding thermal hole respectively and flow through heat radiation rack, finally arranged respectively by two exhaust fans Out, mobile phone placed cavity and the intracavitary airtightness of viewing be ensure that, guarantee viewing quality.
2, the setting of the first heat radiation rack and the second heat radiation rack is so that the circulation sky that first exhaust fan and second exhaust fan generate Gas will not act directly on eyes, and the wind-force generated exhaust fan by multiple thermal holes is evenly dispersed and not blow-through eye Ball guarantees comfort when user's long periods of wear.
3, intracavitary in mobile phone placed cavity and viewing while heat radiation rack is set, and thermally conductive sheet and gas-guide tube are respectively close to eyeglass Two side positions, guarantee that the two sides of eyeglass keep the circulation of drying property and air at any time, it is ensured that eyeglass two sides temperature Equilibrium avoids lens surface from generating fog.
Detailed description of the invention
Fig. 1 is the schematic perspective view for the VR glasses that the utility model embodiment has heat sinking function.
Fig. 2 is the structural schematic diagram of the viewing chamber for the VR glasses that the utility model embodiment has heat sinking function.
Fig. 3 is the structural schematic diagram of the mobile phone placed cavity for the VR glasses that the utility model embodiment has heat sinking function.
Fig. 4 is structural schematic diagram at the A for the VR glasses that the utility model embodiment has heat sinking function.
Fig. 5 is the structural schematic diagram of the first heat radiation rack of the VR glasses that the utility model embodiment has heat sinking function.
Wherein, the identical appended drawing reference of identical component in the accompanying drawings;The attached drawing is not drawn according to the actual ratio.
Specific embodiment
The utility model is further illustrated with reference to the accompanying drawings and examples.
Embodiment
A kind of VR glasses with heat sinking function, including lens body 1 are provided with mobile phone placed cavity 2 in lens body 1 With viewing chamber 3, it is provided with eyeglass 4 between the mobile phone placed cavity 2 and the viewing chamber 3, the mobile phone placed cavity 2 is along inner wall It is provided with first heat radiation rack of circle 5, first heat radiation rack 5 is to divide on hollow structure and the inner wall of first heat radiation rack 5 Several first thermal holes 51 are furnished with, the lateral wall of first heat radiation rack 5 is equipped with the first row stomata 52 being in communication with the outside, institute The port position for stating first row stomata 52 is equipped with first exhaust fan 6, and the first exhaust fan 6 is fixedly connected on the mobile phone and places On the side wall of chamber 2;It the front opening of the viewing chamber 3 and is equipped at the edge of opening and wears frame 7, the viewing chamber 3 is along interior Wall is provided with second heat radiation rack of circle 8, and second heat radiation rack 8 is on hollow structure and the inner wall of second heat radiation rack 8 Several second thermal holes 81 are distributed with, the lateral wall of second heat radiation rack 8 is equipped with the second row stomata 82 being in communication with the outside, The port position of the second row stomata 82 is equipped with second exhaust fan 9, and the second exhaust fan 9 is fixedly connected on the viewing On the side wall of chamber 3, gas-guide tube 83 is additionally provided on second heat radiation rack 8, the quantity of the gas-guide tube 83 is four, each eyeglass 4 edge is respectively arranged two gas-guide tubes 83, is connected to simultaneously inside described 83 one end of gas-guide tube and second heat radiation rack 8 And the edge of the eyeglass 4 is arranged in the other end.
First heat radiation rack 5 is equipped with heat-transfer device 10, and the heat-transfer device 10 is fixedly connected on first heat dissipation On one circle inner sidewall of frame 5;Mobile phone is placed in mobile phone placed cavity 2 and fixed, heat-transfer device 10 around mobile phone surrounding, by hand The heat that machine generates in playing process quickly absorbs, by heat rapid aggregation around the first thermal hole 51, and can be by part Heat is directly conducted on the first heat radiation rack 5, and heat is discharged to the external world by the first heat radiation rack 5.If the heat-transfer device 10 includes Dry thermally conductive sheet 101 is arranged in parallel between the adjacent thermally conductive sheet 101, and the thermally conductive sheet 101 is dissipated perpendicular to described first The inner sidewall of hot frame 5, first thermal hole 51 are distributed in the gap between the adjacent thermally conductive sheet 101;Thermally conductive sheet 101 While on the quick Assimilation and conductivity of heat to the first heat radiation rack 5 that mobile phone is generated, the first thermal hole 51 can siphon away two in time Heat between a thermally conductive sheet 101 in space accelerates the air flowing in mobile phone placed cavity 2, reaches the function of radiating in time.
Second heat radiation rack 8 is bonded the position punishment for wearing frame 7 and is furnished with a circle second thermal hole 81;It wears Frame 7 is directly contacted with the fitting of the surface of face, and joint place easily because of aggregation sweat sultry in viewing chamber 3, is set along the profile for wearing frame 7 Second thermal hole of circle 81 is set, quickly by the heat absorption of face joint place and the external world can be discharged to, keeps the dry of face joint place It is dry and pleasant.One layer of cushion 71 is coated on the outer for wearing frame 7;It is more bonded face when wearing, makes to wear more Comfortably.
The use principle of the utility model embodiment is: after user wears VR glasses, mobile phone being mounted on mobile phone and is put It sets in chamber 2, thermally conductive sheet 101 is centered around the surrounding of mobile phone, while a side of thermally conductive sheet 101 is close to eyeglass 4;Open first row Gas fan 6 and second exhaust fan 9:
Firstly, thermally conductive sheet 101 absorbs the heat generated when mobile phone plays, by mobile phone placed cavity 2 in mobile phone placed cavity 2 Interior heat quickly concentrates near 5 inner sidewall of the first heat radiation rack, thermally conductive by first when first exhaust fan 6 operates Heat is detached mobile phone placed cavity 2 from the hollow structure of the first heat radiation rack 5 by hole 51, and is discharged to VR glasses by first exhaust fan 6 Outside, while thermally conductive sheet 101 is connected directly between on the inner sidewall of the first heat radiation rack 5, can also be passed to a part of heat to first and be dissipated Hot frame 5, and be discharged to outside VR glasses by first exhaust fan 6;
Secondly, the skin around glasses is sealed in viewing chamber 3 in viewing chamber 3, second exhaust fan 9 operate when It waits, air damp and hot in viewing chamber 3 is detached into viewing chamber 3 from the hollow structure of the second heat radiation rack 8 by the second thermal hole 81, and And it nearby is equipped with second thermal hole of circle 81 along the profile for wearing frame 7, the heat of face joint place is detached in time, keeps people The drying of face joint place, in addition, the end of heat conducting pipe extends to the edge of eyeglass 4, it can be in time by the heat in 4 surrounding air of eyeglass It detaches, keeps the drying around eyeglass 4.
Resultant effect brought by the utility model embodiment includes:
1, the utility model simple structure is reasonable, easy to use, and first exhaust fan 6 and second exhaust fan 9 are respectively with first Heat radiation rack 5 is connected to the hollow structure of the second heat radiation rack 8, is distributed several thermal holes on the inner sidewall of two heat radiation racks, and VR The heat generated in two chambers in mirror passes through corresponding thermal hole respectively and flows through heat radiation rack, finally respectively by two exhaust fans Discharge ensure that the airtightness in mobile phone placed cavity 2 and viewing chamber 3, guarantee viewing quality.
2, the setting of the first heat radiation rack 5 and the second heat radiation rack 8 is so that the stream that first exhaust fan 6 and second exhaust fan 9 generate Blowing air will not act directly on eyes, and the wind-force for being generated exhaust fan by multiple thermal holes is evenly dispersed and not straight Eyeball is blown, guarantees comfort when user's long periods of wear.
3, heat radiation rack is set simultaneously in mobile phone placed cavity 2 and viewing chamber 3, and thermally conductive sheet 101 and gas-guide tube 83 are distinguished Close to two side positions of eyeglass 4, guarantee that the two sides of eyeglass 4 keep the circulation of drying property and air at any time, it is ensured that 4 liang of eyeglass The equilibrium of side temperature avoids 4 surface of eyeglass from generating fog.
This specification structure depicted in this specification institute accompanying drawings, ratio, size etc., only to cooperate specification revealed interior Hold, so that those skilled in the art understands and reads, is not intended to limit the utility model enforceable qualifications, therefore not Has technical essential meaning, the modification of any structure, the change of proportionate relationship or the adjustment of size are practical new not influencing this Under the effect of type can be generated and the purpose that can reach, it should all still fall in the revealed technology contents of the utility model and obtain and can contain In the range of lid.Meanwhile it is cited such as "upper", "lower", "left", "right", " centre ", " first ", " second " in this specification And the term of " one " etc., it is merely convenient to being illustrated for narration, rather than to limit the enforceable range of the utility model, it is opposite Relationship is altered or modified, under the content of no substantial changes in technology, when being also considered as the enforceable scope of the utility model.
The utility model is described above with reference to preferred embodiment, but the protection scope of the utility model is not Limited to this, any all technical solutions fallen within the scope of the appended claims are within the protection scope of the present utility model.? In the case where not departing from the scope of the utility model, various improvement can be carried out to it and can be replaced with equivalent therein Component.Especially, as long as structural conflict is not present, items technical characteristic mentioned in the various embodiments can be in any way It combines.

Claims (6)

1. a kind of VR glasses with heat sinking function, which is characterized in that including lens body, be provided with mobile phone in lens body and put Chamber and viewing chamber are set, eyeglass is provided between the mobile phone placed cavity and the viewing chamber, the mobile phone placed cavity is set along inner wall It is equipped with first heat radiation rack of circle, if first heat radiation rack is to be distributed on hollow structure and the inner wall of first heat radiation rack Dry first thermal hole, the lateral wall of first heat radiation rack are equipped with the first row stomata being in communication with the outside, the first exhaust The port position in hole is equipped with first exhaust fan, and the first exhaust fan is fixedly connected on the side wall of the mobile phone placed cavity;Institute It states the front opening of viewing chamber and is equipped at the edge of opening and wear frame, the viewing chamber is provided with a circle second along inner wall and dissipates Hot frame, second heat radiation rack are that several second thermal holes are distributed on hollow structure and the inner wall of second heat radiation rack, The lateral wall of second heat radiation rack is equipped with the second row stomata being in communication with the outside, and the port position of the second row stomata is set There is second exhaust fan, the second exhaust fan is fixedly connected on the side wall of the viewing chamber, is also set on second heat radiation rack There is a gas-guide tube, is connected to inside described gas-guide tube one end and second heat radiation rack and the side of the eyeglass is arranged in the other end Edge.
2. the VR glasses according to claim 1 with heat sinking function, which is characterized in that first heat radiation rack is equipped with Heat-transfer device, the heat-transfer device are fixedly connected on a circle inner sidewall of first heat radiation rack.
3. the VR glasses according to claim 2 with heat sinking function, which is characterized in that the heat-transfer device includes several Thermally conductive sheet is arranged in parallel between the adjacent thermally conductive sheet, and the thermally conductive sheet is perpendicular to the inner sidewall of first heat radiation rack, First thermal hole is distributed in the gap between the adjacent thermally conductive sheet.
4. the VR glasses according to claim 3 with heat sinking function, which is characterized in that second heat radiation rack is bonded institute The position punishment for stating wearing frame is furnished with a circle second thermal hole.
5. the VR glasses according to claim 1-4 with heat sinking function, which is characterized in that the gas-guide tube Quantity is four, and the edge of each eyeglass is respectively arranged two gas-guide tubes.
6. the VR glasses according to claim 5 with heat sinking function, which is characterized in that wrapped on the outer for wearing frame It is covered with one layer of cushion.
CN201820967303.4U 2018-06-22 2018-06-22 A kind of VR glasses with heat sinking function Expired - Fee Related CN208387165U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201820967303.4U CN208387165U (en) 2018-06-22 2018-06-22 A kind of VR glasses with heat sinking function

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201820967303.4U CN208387165U (en) 2018-06-22 2018-06-22 A kind of VR glasses with heat sinking function

Publications (1)

Publication Number Publication Date
CN208387165U true CN208387165U (en) 2019-01-15

Family

ID=64964941

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201820967303.4U Expired - Fee Related CN208387165U (en) 2018-06-22 2018-06-22 A kind of VR glasses with heat sinking function

Country Status (1)

Country Link
CN (1) CN208387165U (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109709679A (en) * 2019-03-14 2019-05-03 大连交通大学 A kind of virtual reality enhanced smart glasses device
CN110376745A (en) * 2019-07-30 2019-10-25 华育昌(肇庆)智能科技研究有限公司 Convenient for the VR glasses of heat dissipation
CN110749996A (en) * 2019-11-08 2020-02-04 深圳职业技术学院 VR equipment

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109709679A (en) * 2019-03-14 2019-05-03 大连交通大学 A kind of virtual reality enhanced smart glasses device
CN110376745A (en) * 2019-07-30 2019-10-25 华育昌(肇庆)智能科技研究有限公司 Convenient for the VR glasses of heat dissipation
CN110749996A (en) * 2019-11-08 2020-02-04 深圳职业技术学院 VR equipment

Similar Documents

Publication Publication Date Title
CN208387165U (en) A kind of VR glasses with heat sinking function
US7534005B1 (en) Welding helmet
CN206975323U (en) Head-mounted display apparatus
TWI605329B (en) Head wearable display device
CN206990931U (en) virtual reality display and virtual reality glasses
US20120315128A1 (en) Personal Cooling System and Method
CN207440398U (en) Wear display device
CN213684631U (en) Portable temperature regulating device
CN111616459A (en) Split type intelligent cooling protection hood
CN108508605A (en) A kind of comfortable heat radiating type VR glasses based on virtual reality interaction
US6094750A (en) Modified safety helmet heat sink
CN110376745A (en) Convenient for the VR glasses of heat dissipation
CN206532040U (en) A kind of VR helmets housing and its VR helmets
US20190137149A1 (en) Cooling and ventilation device, cooling hat, cooling shoes, and cooling backpack
KR101842972B1 (en) Backrest structure for knapsack
CN219012919U (en) Wearing temperature regulating device capable of blowing air at back
CN209355449U (en) Wind outlet panel and air conditioner
CN209693332U (en) Wear display equipment
CN207440449U (en) A kind of medical Anti-fog glasses
CN108828775A (en) One kind can radiate VR spectacle frame
CN205750134U (en) A kind of virtual reality visor ventilating structure
CN213188336U (en) Helmet with temperature control function
CN107866045A (en) Swimming Anti-fog glasses
CN210514790U (en) Antifog ventilative VR helmet
JP7330571B1 (en) Helmet heat shield structure

Legal Events

Date Code Title Description
GR01 Patent grant
GR01 Patent grant
CP01 Change in the name or title of a patent holder
CP01 Change in the name or title of a patent holder

Address after: 266000 Hong Kong Plaza 2-1-502, 88 Hong Kong Middle Road, Shinan District, Qingdao City, Shandong Province

Patentee after: Qingdao Daoyuan Zhongsheng Innovation Technology Co., Ltd.

Address before: 266000 Hong Kong Plaza 2-1-502, 88 Hong Kong Middle Road, Shinan District, Qingdao City, Shandong Province

Patentee before: Qingdao Daoyuan Zhongsheng Exhibition Co., Ltd.

CF01 Termination of patent right due to non-payment of annual fee
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20190115

Termination date: 20210622