CN110276933A - A kind of waterproof flammable gas alarm - Google Patents

A kind of waterproof flammable gas alarm Download PDF

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Publication number
CN110276933A
CN110276933A CN201910507341.0A CN201910507341A CN110276933A CN 110276933 A CN110276933 A CN 110276933A CN 201910507341 A CN201910507341 A CN 201910507341A CN 110276933 A CN110276933 A CN 110276933A
Authority
CN
China
Prior art keywords
wall
chamber
waterproof
flammable gas
hinged
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.)
Pending
Application number
CN201910507341.0A
Other languages
Chinese (zh)
Inventor
吴海涛
李志洁
张思思
李羽商
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 Rongxuanda Testing Service Co Ltd
Original Assignee
Qingdao Rongxuanda Testing Service 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 Rongxuanda Testing Service Co Ltd filed Critical Qingdao Rongxuanda Testing Service Co Ltd
Priority to CN201910507341.0A priority Critical patent/CN110276933A/en
Publication of CN110276933A publication Critical patent/CN110276933A/en
Pending legal-status Critical Current

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16MFRAMES, CASINGS OR BEDS OF ENGINES, MACHINES OR APPARATUS, NOT SPECIFIC TO ENGINES, MACHINES OR APPARATUS PROVIDED FOR ELSEWHERE; STANDS; SUPPORTS
    • F16M11/00Stands or trestles as supports for apparatus or articles placed thereon ; Stands for scientific apparatus such as gravitational force meters
    • F16M11/02Heads
    • F16M11/04Means for attachment of apparatus; Means allowing adjustment of the apparatus relatively to the stand
    • F16M11/041Allowing quick release of the apparatus
    • GPHYSICS
    • G08SIGNALLING
    • G08BSIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B21/00Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
    • G08B21/02Alarms for ensuring the safety of persons
    • G08B21/12Alarms for ensuring the safety of persons responsive to undesired emission of substances, e.g. pollution alarms
    • G08B21/16Combustible gas alarms

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Toxicology (AREA)
  • Health & Medical Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • General Health & Medical Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Emergency Alarm Devices (AREA)

Abstract

The invention patent belongs to flammable gas alarm technical field, in particular a kind of waterproof flammable gas alarm, including the fixed plate being fixedly mounted on wall and alarm ontology, two chambers are offered in the fixed plate, through-hole is offered in the bottom interior wall of the chamber, cylinder is slidably fitted in the through-hole, it is fixedly connected at the top of the bottom end of the cylinder and alarm ontology, the top of the cylinder extends in chamber, and annular slot is offered on cylinder, it is hinged in the top inner wall of the chamber that there are two vertical bars, two vertical bar sides close to each other are fixedly installed with fixture block, two fixture blocks are adapted with annular slot, two vertical bar sides close to each other are hinged with connecting rod, the top of two connecting rods is hinged with the same sliding block, cabinet is fixedly installed in the top inner wall of the chamber.The invention patent is easy to operate, easy to use, and fixed effect is also more excellent.

Description

A kind of waterproof flammable gas alarm
Technical field
The invention patent relates to flammable gas alarm technical field more particularly to a kind of waterproof flammable gas alarms.
Background technique
Flammable gas alarm is also referred to as gas leakage detection warning instrument.When industrial environment, everyday environments are (as used The kitchen of natural gas) in imflammable gas reveal, flammable gas alarm detects that imflammable gas concentration reaches alarm When the alarming value of device setting, flammable gas alarm will issue sound, visual alarm, take evacuating personnel, pressure to remind The safety measures such as equipment are shut down in air draft, are promoted with scientific and technological continuous, the quality of flammable gas alarm also more excellent, Generally all has the advantages that waterproof, fire prevention.
But common flammable gas alarm is typically all to be fixed by screws on roof, and fixed by screw It is not only time-consuming and laborious, and the normal fixed effect of time one can also be deteriorated, to will appear the feelings that alarm falls off from eminence and damaged Condition, for this purpose, proposing a kind of waterproof flammable gas alarm.
Patent of invention content
The purpose of the invention patent is and a kind of waterproof combustible gas proposed in order to solve disadvantage existing in the prior art Body alarm.
To achieve the goals above, the invention patent adopts the technical scheme that a kind of waterproof flammable gas alarm, Including the fixed plate being fixedly mounted on wall and alarm ontology, two chambers, the chamber are offered in the fixed plate Bottom interior wall on offer through-hole, be slidably fitted with cylinder in the through-hole, the bottom end of the cylinder and alarm ontology Top is fixedly connected, and the top of the cylinder extends in chamber, and annular slot is offered on cylinder, the top of the chamber Hinged there are two vertical bar on inner wall, two vertical bar sides close to each other are fixedly installed with fixture block, and two fixture blocks are and annular Card slot is adapted, and two vertical bar sides close to each other are hinged with connecting rod, and the top of two connecting rods is hinged with the same sliding block, It is fixedly installed with cabinet in the top inner wall of the chamber, offers slide opening in the bottom interior wall of the cabinet, in the slide opening It is slidably fitted with round bar, the bottom end of the round bar extends to outside slide opening and is fixedly connected with sliding block, is slidably installed in the cabinet There is transverse slat, the top of the round bar extends in cabinet and is fixedly connected with transverse slat, fixed peace in the top inner wall of the cabinet Equipped with spring, the bottom end of the spring is fixedly connected with transverse slat, and rectangular opening is offered on two vertical bars, is slided in two rectangular openings Dynamic to be equipped with the same cross bar, the bottom of the sliding block is fixedly installed with push rod, and the bottom end of the push rod is fixedly connected with cross bar, Circular hole is offered in the bottom interior wall of the chamber, pull rod is slidably fitted in the circular hole, and the top of the pull rod extends to It is fixedly connected in chamber and with cross bar.
Preferably, limiting slot is offered in the top inner wall of the chamber, the both ends of the cross bar extend respectively to pair It is slidably connected in the limiting slot answered and with the inner wall of corresponding limiting slot.
Preferably, be fixedly mounted in the top inner wall of the chamber there are two hinged block, the top of two vertical bars respectively and Corresponding hinged block is hinged.
Preferably, the bottom end of the pull rod extends to outside circular hole and is fixedly installed with pull ring.
Preferably, the bottom of the fixed plate is opened up there are two annular groove, is fixedly installed in two annular grooves Sealing ring, the sealing ring and alarm ontology are adapted.
Preferably, the bottom of the cylinder and fixture block is cambered design.
Preferably, it is fixedly installed with sealing ring in the circular hole, the inner wall of the pull rod and sealing ring is slidably connected.
Preferably, the two sides of the transverse slat are nested with ball, and two balls are rolled with the two sides inner wall of cabinet respectively to be connected It connects.
Preferably, two vertical bar sides close to each other are fixedly installed with fixed block, the bottom of two connecting rods respectively and Corresponding fixed block is hinged.
Preferably, it is fixedly installed with wear washer in the slide opening, the inner wall of the round bar and wear washer is slidably connected.
Compared with prior art, the beneficial effect of the invention patent is: firstly, the device passes through fixed plate, alarm sheet Body, chamber, through-hole, cylinder, vertical bar, annular slot, fixture block, connecting rod, sliding block, cabinet, pull rod, slide opening, round bar, transverse slat, spring, The cooperation of the devices such as rectangular opening, cross bar, push rod, circular hole, the model ZC-RQ916 of alarm ontology, in installation alarm ontology When, two cylinders on alarm ontology are directed at corresponding through-hole, when column top touches corresponding two fixture blocks When, cylinder drives two vertical bars to rotate and be located remotely from each other using corresponding hinged block as the center of circle by two fixture blocks, until two When a fixture block is moved to corresponding annular slot, spring pulls transverse slat to move up, and transverse slat passes through round bar again and drives sliding block It moves up, sliding block passes through two connecting rods again and drives two vertical bars using corresponding hinged block as center of circle rotation and close to each other, Deng Daosi When a fixture block is sticked into corresponding annular slot, alarm ontology just by tightly and fixed plate be fixed together, When removing alarm ontology from fixed plate, while two pull rings being pulled, pull ring drives cross bar to move down by pull rod, Cross bar is moved down by push rod band movable slider again, and sliding block passes through two connecting rods again and drives two vertical bars using corresponding hinged block as the center of circle It rotating and is located remotely from each other, vertical bar drives fixture block to be detached from annular slot again, until four fixture blocks are detached from corresponding annular slot When, alarm ontology can be removed easily from fixed plate.
The invention patent is easy to operate, easy to use, and fixed effect is also more excellent.
Detailed description of the invention
Fig. 1 is the front view schematic cross-sectional view of the invention patent;
Fig. 2 is the enlarged structure schematic diagram of part A in Fig. 1 of the invention patent;
Fig. 3 is the enlarged structure schematic diagram of part B in Fig. 2 of the invention patent;
In figure: 1, fixed plate;2, alarm ontology;3, chamber;4, through-hole;5, cylinder;6, vertical bar;7, annular slot;8, Fixture block;9, connecting rod;10, sliding block;11, cabinet;12, pull rod;13, slide opening;14, round bar;15, transverse slat;16, spring;17, rectangle Hole;18, cross bar;19, push rod;20, circular hole.
Specific embodiment
Below in conjunction with the attached drawing in the invention patent embodiment, the technical solution in the invention patent embodiment is carried out Clearly and completely describing, it is clear that described embodiment is only the invention patent a part of the embodiment, rather than whole Embodiment.Based on the embodiment in the invention patent, those of ordinary skill in the art are without making creative work Every other embodiment obtained belongs to the range of the invention patent protection.
Fig. 1-3 is please referred to, the invention patent provides a kind of technical solution: a kind of waterproof flammable gas alarm, including it is solid Dingan County is mounted in fixed plate 1 and alarm ontology 2 on wall, offers two chambers 3, the bottom interior wall of chamber 3 in fixed plate 1 On offer through-hole 4, cylinder 5 is slidably fitted in through-hole 4, the bottom end of cylinder 5 is fixedly connected with the top of alarm ontology 2, The top of cylinder 5 extends in chamber 3, and annular slot 7 is offered on cylinder 5, it is hinged in the top inner wall of chamber 3 there are two Vertical bar 6, two vertical bars 6 side close to each other are fixedly installed with fixture block 8, and two fixture blocks 8 are adapted with annular slot 7, Two vertical bars 6 side close to each other is hinged with connecting rod 9, and the top of two connecting rods 9 is hinged with the same sliding block 10, chamber 3 Top inner wall on be fixedly installed with cabinet 11, slide opening 13 is offered in the bottom interior wall of cabinet 11, is slidably installed in slide opening 13 There is round bar 14, the bottom end of round bar 14 extends to outside slide opening 13 and is fixedly connected with sliding block 10, is slidably fitted with transverse slat in cabinet 11 15, the top of round bar 14 extends in cabinet 11 and is fixedly connected with transverse slat 15, is fixedly installed in the top inner wall of cabinet 11 The bottom end of spring 16, spring 16 is fixedly connected with transverse slat 15, and rectangular opening 17, two rectangular openings 17 are offered on two vertical bars 6 It is inside slidably fitted with the same cross bar 18, the bottom of sliding block 10 is fixedly installed with push rod 19, and the bottom end of push rod 19 and cross bar 18 are solid It is fixed to connect, circular hole 20 is offered in the bottom interior wall of chamber 3, pull rod 12 is slidably fitted in circular hole 20, the top of pull rod 12 is prolonged It extends in chamber 3 and is fixedly connected with cross bar 18;
Limiting slot is offered in the top inner wall of chamber 3, the both ends of cross bar 18 extend respectively in corresponding limiting slot And be slidably connected with the inner wall of corresponding limiting slot, there are two hinged block, two vertical bars for fixed installation in the top inner wall of chamber 3 6 top is hinged with corresponding hinged block respectively, and the bottom end of pull rod 12 extends to outside circular hole 20 and is fixedly installed with pull ring, Gu The bottom of fixed board 1 is opened up there are two annular groove, is fixedly installed with sealing ring, sealing ring and alarm in two annular grooves Ontology 2 is adapted, and the bottom of cylinder 5 and fixture block 8 is cambered design, and sealing ring, 12 He of pull rod are fixedly installed in circular hole 20 The inner wall of sealing ring is slidably connected, and the two sides of transverse slat 15 are nested with ball, two balls respectively with the two sides inner wall of cabinet 11 Connection is rolled, two sides close to each other of vertical bar 6 are fixedly installed with fixed block, and the bottom of two connecting rods 9 is respectively and corresponding Fixed block be hinged, be fixedly installed with wear washer in slide opening 13, the inner wall of round bar 14 and wear washer is slidably connected, and passes through Fixed plate 1, alarm ontology 2, chamber 3, through-hole 4, cylinder 5, vertical bar 6, annular slot 7, fixture block 8, connecting rod 9, sliding block 10, cabinet 11, the devices such as pull rod 12, slide opening 13, round bar 14, transverse slat 15, spring 16, rectangular opening 17, cross bar 18, push rod 19, circular hole 20 are matched It closes, the model ZC-RQ916 of alarm ontology 2, when installing alarm ontology 2, by two on alarm ontology 2 Cylinder 5 is directed at corresponding through-hole 4, and when corresponding two fixture block 8 are touched at the top of cylinder 5, cylinder 5 passes through two fixture blocks 8 two vertical bars 6 of drive are rotated and are located remotely from each other using corresponding hinged block as the center of circle, until two fixture blocks 8 are moved to corresponding ring When shape card slot 7, spring 16 pulls transverse slat 15 to move up, and transverse slat 15 drives sliding block 10 to move up by round bar 14 again, sliding block 10 to drive two vertical bars 6 by two connecting rods 9 again using corresponding hinged block be that the center of circle rotates and close to each other, until four fixture blocks 8 when stick into corresponding annular slot 7, alarm ontology 2 just by tightly and fixed plate 1 be fixed together, When alarm ontology 2 is removed from fixed plate 1, while two pull rings are pulled, pull ring drives cross bar 18 by pull rod 12 It moves down, cross bar 18 is moved down by push rod 19 with movable slider 10 again, and sliding block 10 drives two vertical bars 6 with right by two connecting rods 9 again The hinged block answered is that the center of circle rotates and is located remotely from each other, and vertical bar 6 drives fixture block 8 to be detached from annular slot 7 again, until four fixture blocks 8 are equal When being detached from corresponding annular slot 7, alarm ontology 2 can be removed easily from fixed plate 1, the invention patent behaviour Make simple, easy to use, and fixed effect is also more excellent.
Working principle: the model ZC-RQ916 of alarm ontology 2, when installing alarm ontology 2, by alarm Two cylinders 5 on ontology 2 are directed at corresponding through-hole 4, when corresponding two fixture block 8 are touched at the top of cylinder 5, cylinder 5 drive two vertical bars 6 to rotate and be located remotely from each other using corresponding hinged block as the center of circle by two fixture blocks 8, until two fixture blocks 8 move When moving corresponding annular slot 7, spring 16 pulls transverse slat 15 to move up, and transverse slat 15 drives sliding block by round bar 14 again 10 move up, and it using corresponding hinged block is center of circle rotation and close to each other that sliding block 10, which drives two vertical bars 6 by two connecting rods 9 again, When four fixture blocks 8 stick into corresponding annular slot 7, alarm ontology 2 just by tightly and fixed plate 1 it is fixed Together, when removing alarm ontology 2 from fixed plate 1, while two pull rings are pulled, pull ring passes through pull rod 12 Cross bar 18 is driven to move down, cross bar 18 is moved down by push rod 19 with movable slider 10 again, and sliding block 10 drives two by two connecting rods 9 again Vertical bar 6 is rotated and is located remotely from each other using corresponding hinged block as the center of circle, and vertical bar 6 drives fixture block 8 to be detached from annular slot 7 again, until four When a fixture block 8 is detached from corresponding annular slot 7, alarm ontology 2 can be removed easily from fixed plate 1.
The preferable specific embodiment of the above, only the invention patent, but the scope of protection of the patent of the present invention is not It is confined to this, anyone skilled in the art is in the technical scope that the invention patent discloses, according to the present invention Technical solution and its patent of invention design of patent are subject to equivalent substitution or change, should all cover the protection model in the invention patent Within enclosing.

Claims (10)

1. a kind of waterproof flammable gas alarm, including the fixed plate (1) being fixedly mounted on wall and alarm ontology (2), It is characterized by: offering two chambers (3) on the fixed plate (1), through-hole is offered in the bottom interior wall of the chamber (3) (4), it is slidably fitted with cylinder (5) in the through-hole (4), the bottom end of the cylinder (5) and the top of alarm ontology (2) are fixed Connection, the top of the cylinder (5) extends in chamber (3), and annular slot (7), the chamber are offered on cylinder (5) (3) hinged in top inner wall there are two vertical bar (6), and two vertical bar (6) sides close to each other are fixedly installed with fixture block (8), two fixture blocks (8) are adapted with annular slot (7), and two vertical bar (6) sides close to each other are hinged with connecting rod (9), the top of two connecting rods (9) is hinged with the same sliding block (10), is fixedly installed with case in the top inner wall of the chamber (3) Body (11) offers slide opening (13) in the bottom interior wall of the cabinet (11), is slidably fitted with round bar in the slide opening (13) (14), the bottom end of the round bar (14) extends to slide opening (13) outside and is fixedly connected with sliding block (10), sliding in the cabinet (11) Dynamic to be equipped with transverse slat (15), the top of the round bar (14) extends in cabinet (11) and is fixedly connected with transverse slat (15), described It being fixedly installed in the top inner wall of cabinet (11) spring (16), the bottom end of the spring (16) is fixedly connected with transverse slat (15), It offers rectangular opening (17) on two vertical bars (6), is slidably fitted with the same cross bar (18) in two rectangular openings (17), it is described The bottom of sliding block (10) is fixedly installed with push rod (19), and the bottom end of the push rod (19) is fixedly connected with cross bar (18), the chamber It offers circular hole (20), is slidably fitted with pull rod (12) in the circular hole (20), the pull rod (12) in the bottom interior wall of room (3) Top extend in chamber (3) and be fixedly connected with cross bar (18).
2. a kind of waterproof flammable gas alarm according to claim 1, it is characterised in that: the top of the chamber (3) Limiting slot is offered on inner wall, the both ends of the cross bar (18) extend respectively in corresponding limiting slot and and corresponding limit The inner wall of slot is slidably connected.
3. a kind of waterproof flammable gas alarm according to claim 1, it is characterised in that: the top of the chamber (3) Hinged block there are two being fixedly mounted on inner wall, the top of two vertical bars (6) is hinged with corresponding hinged block respectively.
4. a kind of waterproof flammable gas alarm according to claim 1, it is characterised in that: the bottom end of the pull rod (12) It extends to circular hole (20) outside and is fixedly installed with pull ring.
5. a kind of waterproof flammable gas alarm according to claim 1, it is characterised in that: the bottom of the fixed plate (1) Portion is opened up there are two annular groove, is fixedly installed with sealing ring, the sealing ring and alarm ontology in two annular grooves (2) it is adapted.
6. a kind of waterproof flammable gas alarm according to claim 1, it is characterised in that: the cylinder (5) and fixture block (8) bottom is cambered design.
7. a kind of waterproof flammable gas alarm according to claim 1, it is characterised in that: fixed in the circular hole (20) Sealing ring is installed, the inner wall of the pull rod (12) and sealing ring is slidably connected.
8. a kind of waterproof flammable gas alarm according to claim 1, it is characterised in that: the two sides of the transverse slat (15) It is nested with ball, two balls roll with the two sides inner wall of cabinet (11) connect respectively.
9. a kind of waterproof flammable gas alarm according to claim 1, it is characterised in that: two vertical bars (6) are mutually leaned on Close side is fixedly installed with fixed block, and the bottom of two connecting rods (9) is hinged with corresponding fixed block respectively.
10. a kind of waterproof flammable gas alarm according to claim 1, it is characterised in that: solid in the slide opening (13) Dingan County is equipped with wear washer, and the inner wall of the round bar (14) and wear washer is slidably connected.
CN201910507341.0A 2019-06-12 2019-06-12 A kind of waterproof flammable gas alarm Pending CN110276933A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201910507341.0A CN110276933A (en) 2019-06-12 2019-06-12 A kind of waterproof flammable gas alarm

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201910507341.0A CN110276933A (en) 2019-06-12 2019-06-12 A kind of waterproof flammable gas alarm

Publications (1)

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CN110276933A true CN110276933A (en) 2019-09-24

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CN201910507341.0A Pending CN110276933A (en) 2019-06-12 2019-06-12 A kind of waterproof flammable gas alarm

Country Status (1)

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CN (1) CN110276933A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113129693A (en) * 2021-04-15 2021-07-16 萧山区育英实验学校 Multimedia interactive teaching device convenient to use
CN113421475A (en) * 2021-06-18 2021-09-21 浙江工贸职业技术学院 Electronic commerce teaching display device easy to assemble
CN118015796A (en) * 2024-04-09 2024-05-10 深圳市中燃科技有限公司 Gas leakage detection device

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WO2009039292A1 (en) * 2007-09-18 2009-03-26 Shai Eynav Device for coupling a camera and lens assembly to a belt
CN107940320A (en) * 2017-12-01 2018-04-20 罗志江 A kind of new easy-to-dismount LED lamp
CN207540684U (en) * 2017-11-24 2018-06-26 宁瑞辉 A kind of temperature-detecting device of Architectural Equipment
CN207993209U (en) * 2018-01-31 2018-10-19 金之光 A kind of city gas safety monitoring device
CN207990393U (en) * 2018-04-24 2018-10-19 蓝玉 A kind of LED seat being easily installed
CN109473879A (en) * 2018-11-26 2019-03-15 大庆市隆赫石油科技开发有限公司 A kind of oil extraction in oil field device ups power
CN109827041A (en) * 2019-03-16 2019-05-31 天津一测防爆科技有限公司 Explosion-proof combined aural and visual alarm

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009039292A1 (en) * 2007-09-18 2009-03-26 Shai Eynav Device for coupling a camera and lens assembly to a belt
CN207540684U (en) * 2017-11-24 2018-06-26 宁瑞辉 A kind of temperature-detecting device of Architectural Equipment
CN107940320A (en) * 2017-12-01 2018-04-20 罗志江 A kind of new easy-to-dismount LED lamp
CN207993209U (en) * 2018-01-31 2018-10-19 金之光 A kind of city gas safety monitoring device
CN207990393U (en) * 2018-04-24 2018-10-19 蓝玉 A kind of LED seat being easily installed
CN109473879A (en) * 2018-11-26 2019-03-15 大庆市隆赫石油科技开发有限公司 A kind of oil extraction in oil field device ups power
CN109827041A (en) * 2019-03-16 2019-05-31 天津一测防爆科技有限公司 Explosion-proof combined aural and visual alarm

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113129693A (en) * 2021-04-15 2021-07-16 萧山区育英实验学校 Multimedia interactive teaching device convenient to use
CN113421475A (en) * 2021-06-18 2021-09-21 浙江工贸职业技术学院 Electronic commerce teaching display device easy to assemble
CN118015796A (en) * 2024-04-09 2024-05-10 深圳市中燃科技有限公司 Gas leakage detection device

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Application publication date: 20190924

RJ01 Rejection of invention patent application after publication