CN111179536A - Wireless remote control's intelligent fire alarm - Google Patents
Wireless remote control's intelligent fire alarm Download PDFInfo
- Publication number
- CN111179536A CN111179536A CN202010196103.5A CN202010196103A CN111179536A CN 111179536 A CN111179536 A CN 111179536A CN 202010196103 A CN202010196103 A CN 202010196103A CN 111179536 A CN111179536 A CN 111179536A
- Authority
- CN
- China
- Prior art keywords
- shell
- close
- filter screen
- remote control
- circuit board
- 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.)
- Withdrawn
Links
Images
Classifications
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B17/00—Fire alarms; Alarms responsive to explosion
- G08B17/06—Electric actuation of the alarm, e.g. using a thermally-operated switch
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B17/00—Fire alarms; Alarms responsive to explosion
- G08B17/10—Actuation by presence of smoke or gases, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B17/00—Fire alarms; Alarms responsive to explosion
- G08B17/10—Actuation by presence of smoke or gases, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means
- G08B17/117—Actuation by presence of smoke or gases, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means by using a detection device for specific gases, e.g. combustion products, produced by the fire
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B7/00—Signalling systems according to more than one of groups G08B3/00 - G08B6/00; Personal calling systems according to more than one of groups G08B3/00 - G08B6/00
- G08B7/06—Signalling systems according to more than one of groups G08B3/00 - G08B6/00; Personal calling systems according to more than one of groups G08B3/00 - G08B6/00 using electric transmission, e.g. involving audible and visible signalling through the use of sound and light sources
-
- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C17/00—Arrangements for transmitting signals characterised by the use of a wireless electrical link
- G08C17/02—Arrangements for transmitting signals characterised by the use of a wireless electrical link using a radio link
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Fire Alarms (AREA)
Abstract
The invention relates to the technical field of fire-fighting equipment, and discloses a wireless remote control intelligent fire-fighting alarm which comprises a shell, wherein a base is fixedly arranged at the bottom end of the shell, a filter screen is embedded in the upper end of the inner side of the shell, a core body is arranged at the lower end of the inner side of the shell, which is positioned at the filter screen, and a waterproof pad is embedded in the lower end of the inner side of the base. The shell and the base are fixedly connected with the inner threaded opening through the outer threaded opening, and the shell, the filter screen and the core are fixedly connected through the screws, so that the alarm except for the base can be detached conveniently, a battery can be replaced conveniently, meanwhile, the alarm can be detached integrally, the interior of the alarm can be maintained conveniently, the filter screen is arranged between the shell and the core, mosquitoes and sundries can be effectively prevented from flying into the core to cause damage of the alarm, the waterproof pad is arranged in the base, the damage to the interior of the alarm after a wall body is affected with damp can be effectively prevented, and the safety and the accuracy of the alarm are improved.
Description
Technical Field
The invention relates to the technical field of fire-fighting equipment, in particular to a wireless remote control intelligent fire-fighting alarm.
Background
Chinese patent discloses an intelligent fire alarm that practicality is strong (grant notice No. CN205810050U), this patent technique can monitor indoor temperature and the size of smog concentration through temperature sensor and smog concentration caliber, reach the value of setting for when the information that detects, audible-visual alarm lamp and speaker can in time send alarm information, the suggestion people takes care of and withdraws, the practicality of intelligent fire alarm has been improved, but it is inconvenient to dismantle it, and then inconvenient overhauls it, and do not set up filter screen and waterproof pad, can not prevent the mosquito effectively, debris fly into the inside of alarm, simultaneously can not prevent that the alarm is inside to wet. Therefore, the technical personnel in the field provide an intelligent fire alarm with wireless remote control to solve the problems in the background technology.
Disclosure of Invention
The invention aims to provide a wireless remote control intelligent fire alarm to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme:
the utility model provides a wireless remote control's intelligent fire alarm, includes the shell, the bottom fixed mounting of shell has the base, and the inboard upper end embedding of shell is provided with the filter screen, the inboard lower extreme that is located the filter screen of shell installs the core, the inboard lower extreme embedding of base is provided with waterproof pad.
As a further scheme of the invention: the shell includes the shell body, the detection groove has evenly been seted up in the outside of the upper end of shell body, and the front side that the upper end of shell body is close to the detection groove opens and is equipped with the groove of making a sound, one side that the upper end of shell body is close to the detection groove is provided with the pilot lamp groove, and the upper end of shell body is close to the opposite side that detects the groove and has seted up the warning lantern hole, the internal thread mouth has been seted up to the lower extreme of the inside wall of shell body, and the top of the inboard of shell body.
As a still further scheme of the invention: the method is as follows. The core is including bearing the dish, the middle part fixed mounting who bears the top of dish has the circuit board, and bears the outside on the top of dish and form four support columns of annular fixedly connected with, the rear side that the top that bears the dish is close to the circuit board is connected with the battery jar through the wire, and the front side that the top that bears the dish is close to the circuit board is connected with bee calling organ through the wire, one side that the top that bears the dish is close to the circuit board is connected with the alarm lamp through the wire.
As a still further scheme of the invention: one side on the top of circuit board is provided with temperature sensor, and one side that the top of circuit board is close to temperature sensor is provided with gas sensor, the front side that the top of circuit board is close to gas sensor is provided with smoke transducer, and one side that the top of circuit board is close to smoke transducer is provided with the singlechip, the rear side that the top of circuit board is close to the singlechip is provided with wireless communication module, and one side that the one end of circuit board is close to wireless communication module is connected with the pilot lamp through the wire.
As a still further scheme of the invention: the filter screen comprises a filter screen body, four positioning holes are uniformly formed in the outer side of the upper end of the filter screen body in an annular mode, a first lamp hole is formed in one side of the upper end of the filter screen body, and a second lamp hole is formed in the other side of the upper end of the filter screen body.
As a still further scheme of the invention: the base includes the base casing, a plurality of counter bore has been seted up to the inboard bottom of base casing circularize, and the upper end fixedly connected with spacing ring that the inside wall of base casing is close to the counter bore, the external screw thread mouth has been seted up in the outside of the upper end of base casing.
As a still further scheme of the invention: the waterproof pad is embedded into the lower end of the limiting ring, and the external thread opening is meshed with the internal thread opening.
As a still further scheme of the invention: the first lamp hole and the indicating lamp groove are located on the same axis, the indicating lamp is sequentially embedded into the inner sides of the first lamp hole and the indicating lamp groove, the alarm lamp penetrates through the inner side of the alarm lamp hole, and the buzzer is located at the lower end of the sounding groove.
As a still further scheme of the invention: the support column, the positioning hole and the internal thread column are located on the same axis, and the outer shell, the filter screen body and the bearing disc sequentially penetrate through the support column, the positioning hole and the internal thread column through screws to be fixedly connected.
Compared with the prior art, the invention has the beneficial effects that:
shell and base pass through external thread mouth and internal thread mouth fixed connection, and a housing, filter screen and core pass through screw fixed connection, thereby the convenience is pulled down the alarm except the part of base, conveniently change the battery, also can wholly take the alarm apart simultaneously, conveniently overhaul its inside, through set up the filter screen between shell and core, can prevent the mosquito effectively, debris fly into in the core, it is impaired to cause the alarm, through set up waterproof pad in the base, can prevent effectively that the wall body from weing the back, the inside impaired of alarm has been caused, the security and the accuracy of alarm have been improved.
Drawings
FIG. 1 is a schematic structural diagram of a wireless remote control intelligent fire alarm;
FIG. 2 is a schematic diagram of a top view of a housing of a wireless remote controlled intelligent fire alarm;
FIG. 3 is a schematic bottom view of the housing of the wireless remote control intelligent fire alarm;
FIG. 4 is a schematic structural diagram of a core body of a wireless remote control intelligent fire alarm;
FIG. 5 is a schematic structural diagram of a filter screen in the wireless remote control intelligent fire alarm;
FIG. 6 is a schematic structural diagram of a base in the wireless remote control intelligent fire alarm;
fig. 7 is a working principle diagram of a core body in the wireless remote control intelligent fire alarm.
In the figure: 1. a housing; 11. an outer housing; 12. a detection tank; 13. a sounding groove; 14. an alarm lamp hole; 15. an indicator light trough; 16. an internally threaded post; 17. an internal threaded port; 2. filtering with a screen; 21. a screen body; 22. positioning holes; 23. a first lamp hole; 24. a second lamp hole; 3. a core body; 31. a carrier tray; 32. a smoke sensor; 33. a single chip microcomputer; 34. a wireless communication module; 35. an indicator light; 36. a battery case; 37. a gas sensor; 38. an alarm lamp; 39. a temperature sensor; 310. a circuit board; 311. a support pillar; 312. a buzzer; 4. a waterproof pad; 5. a base; 51. a base housing; 52. an external thread opening; 53. a limiting ring; 54. a counterbore.
Detailed Description
Referring to fig. 1 to 7, in the embodiment of the present invention, an intelligent fire alarm with wireless remote control includes a housing 1, a base 5 is fixedly installed at a bottom end of the housing 1, a filter screen 2 is embedded in an upper end of an inner side of the housing 1, a core body 3 is installed at a lower end of the filter screen 2 in the inner side of the housing 1, and a waterproof pad 4 is embedded in a lower end of the inner side of the base 5.
In fig. 2 and 3: shell 1 includes shell body 11, detection groove 12 has evenly been seted up in the outside of shell body 11's upper end, shell body 11's upper end is close to the front side that detects groove 12 and has been seted up vocal groove 13, one side that shell body 11's upper end is close to detection groove 12 is provided with instruction light groove 15, alarm lamp hole 14 has been seted up to shell body 11's upper end close to detection groove 12's opposite side, internal thread mouth 17 has been seted up to shell body 11's inside wall's lower extreme, the top of shell body 11's inboard circularizes four internal thread posts 16 of fixedly connected with, detection groove 12 through shell 1 can be so gaseous, smog, the temperature penetrates, conveniently.
In fig. 4: core 3 is including bearing dish 31, the middle part fixed mounting who bears the top of dish 31 has circuit board 310, the outside on the top of bearing dish 31 becomes four support columns 311 of annular fixedly connected with, the rear side that the top of bearing dish 31 is close to circuit board 310 is connected with battery jar 36 through the wire, the front side that the top of bearing dish 31 is close to circuit board 310 is connected with bee calling organ 312 through the wire, can be under the emergence emergency through bee calling organ 312, through audible alarm, one side that the top of bearing dish 31 is close to circuit board 310 is connected with alarm lamp 38 through the wire, can be under the emergence emergency through alarm lamp 38, through flash of light warning.
In fig. 4: one side of the top end of the circuit board 310 is provided with a temperature sensor 39, the temperature sensor 39 can be GY-906 type, the temperature in a room can be detected through the temperature sensor 39, one side of the top end of the circuit board 310 close to the temperature sensor 39 is provided with a gas sensor 37, the gas sensor 37 can be ZC05 type, the gas sensor 37 can monitor the gas content in the room, the front side of the top end of the circuit board 310 close to the gas sensor 37 is provided with a smoke sensor 32, the smoke sensor 32 can be MQ-2-135-3-7-9 type, the smoke content in the room can be monitored through the smoke sensor 32, one side of the top end of the circuit board 310 close to the smoke sensor 32 is provided with a single chip microcomputer 33, the single chip microcomputer 33 can be STC12C5A60S2 type, and the single chip microcomputer 33 can send instructions to an, the top of circuit board 310 is provided with wireless communication module 34 near the rear side of singlechip 33, and the wireless communication module 34 model can select for use EC20CE MINICIE-C type, and the one side that the one end of circuit board 310 is close to wireless communication module 34 is connected with pilot lamp 35 through the wire, gives out light through pilot lamp 35, and the user can know whether the alarm is in operating condition.
In fig. 5: the filter screen 2 comprises a filter screen body 21, four positioning holes 22 are uniformly formed in the outer side of the upper end of the filter screen body 21 in an annular shape, a first lamp hole 23 is formed in one side of the upper end of the filter screen body 21, a second lamp hole 24 is formed in the other side of the upper end of the filter screen body 21, and mosquitoes and sundries can be effectively prevented from flying into the core body from the detection groove 12 through the filter screen 2 to cause damage of the alarm.
In fig. 6: the base 5 comprises a base shell 51, the bottom end of the inner side of the base shell 51 is annularly provided with a plurality of counter bores 54, the inner side wall of the base shell 51 is close to the upper end fixedly connected with limiting rings 53 of the counter bores 54, the outer thread port 52 is arranged on the outer side of the upper end of the base shell 51, and therefore the expansion screw can be inserted into a hole in a wall body from the counter bores 54 and then screwed down clockwise, and the base 5 is fixed on the wall body.
In fig. 3 and 6: waterproof pad 4 embedding is at the lower extreme of spacing ring 53 to can prevent effectively through waterproof pad 4 that the wall body from weing the back, cause the alarm inside impaired, external screw thread mouth 52 is connected with the meshing of internal screw thread mouth 17, thereby conveniently pull down the alarm except the part of base 5, conveniently change the battery.
In fig. 2, 3 and 4: first lamp hole 23 is located the same axis with instruction lamp trough 15, pilot lamp 35 imbeds in proper order in first lamp hole 23 and the inboard of instruction lamp trough 15, thereby can fix pilot lamp 35 in instruction lamp trough 15, the light of pilot lamp 35 can be followed and is emitted in instruction lamp trough 15, alarm lamp 38 runs through the inboard of warning lamp hole 14, thereby can be so that alarm lamp 38 is located the outside of shell body 11, bee calling organ 312 is located the lower extreme of vocal groove 13, thereby can make the sound that bee calling organ 312 sent see through from vocal groove 13.
In fig. 3, 4 and 5: support column 311, locating hole 22 and internal thread post 16 are located the same axis, and outer shell 11, filter screen body 21 and bear dish 31 and run through support column 311, locating hole 22 and internal thread post 16 fixed connection in proper order through the screw to can fix filter screen 2 between core 3 and shell 1, conveniently dismantle it simultaneously, conveniently overhaul it.
The working principle of the invention is as follows: when the alarm needs to be installed on a wall or a wall top, firstly, the shell 1 is rotated anticlockwise to separate the shell 1 from the base 5, then, a hole is punched on the wall or the wall top by using a punching tool to attach the base 5 to the wall, wherein the counter bore 54 is aligned with the hole on the wall, then, an expansion screw is inserted into the hole on the wall from the counter bore 54 and is screwed down clockwise, the fixing of the base 5 is completed, then, a storage battery is installed in the battery groove 36, then, the internal thread opening 17 of the shell 1 is meshed and connected into the external thread opening 52 of the base 5, the indicator light 35 emits light, a user can know that the alarm is always in a working state, when the indicator light 35 is turned off, the battery can be judged to be dead or the alarm fails, the smoke content in a room is monitored by the smoke sensor 32, and the gas content in the room is monitored by the gas sensor 37, temperature in the room is monitored through temperature sensor 39, and the numerical value of monitoring is transmitted to singlechip 33, when smog content, gas content or temperature arbitrary numerical value are greater than the setting value, singlechip 33 sends the instruction, alarm lamp 38 begins the scintillation warning, buzzer 312 sends audible alarm, wireless communication module 34 transmits the numerical value of monitoring for outside mobile terminal equipment simultaneously, the user is not in the room, also can know the condition in the room in time, in time as the reaction, avoid the accident further to enlarge.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention are equivalent to or changed within the technical scope of the present invention.
Claims (9)
1. The utility model provides a wireless remote control's intelligent fire alarm, includes shell (1), its characterized in that, the bottom fixed mounting of shell (1) has base (5), and the upper end embedding of the inboard of shell (1) is provided with filter screen (2), core (3) are installed to the inboard lower extreme that is located filter screen (2) of shell (1), the lower extreme embedding of the inboard of base (5) is provided with waterproof pad (4).
2. The wireless remote control intelligent fire alarm according to claim 1, wherein the housing (1) comprises a housing body (11), detection grooves (12) are uniformly formed in the outer side of the upper end of the housing body (11), a sounding groove (13) is formed in the front side, close to the detection grooves (12), of the upper end of the housing body (11), an indicating lamp groove (15) is formed in one side, close to the detection grooves (12), of the upper end of the housing body (11), an alarm lamp hole (14) is formed in the other side, close to the detection grooves (12), of the upper end of the housing body (11), an internal threaded opening (17) is formed in the lower end of the inner side wall of the housing body (11), and four internal threaded columns (16) are fixedly connected to the top end of the inner side of the housing body (11) in.
3. A wireless remotely controlled intelligent fire alarm as claimed in claim 1, wherein said remote control unit is a wireless remote control unit. Core (3) are including bearing dish (31), the middle part fixed mounting who bears the top of dish (31) has circuit board (310), and bears the outside on the top of dish (31) and form four support columns of annular fixedly connected with (311), the rear side that the top that bears dish (31) is close to circuit board (310) is connected with battery jar (36) through the wire, and the front side that the top that bears dish (31) is close to circuit board (310) is connected with bee calling organ (312) through the wire, one side that the top that bears dish (31) is close to circuit board (310) is connected with alarm lamp (38) through the wire.
4. The intelligent wireless remote control fire alarm according to claim 3, wherein a temperature sensor (39) is arranged on one side of the top end of the circuit board (310), a gas sensor (37) is arranged on one side of the top end of the circuit board (310) close to the temperature sensor (39), a smoke sensor (32) is arranged on the front side of the top end of the circuit board (310) close to the gas sensor (37), a single chip microcomputer (33) is arranged on one side of the top end of the circuit board (310) close to the smoke sensor (32), a wireless communication module (34) is arranged on the rear side of the top end of the circuit board (310) close to the single chip microcomputer (33), and an indicator light (35) is connected to one side of one end of the circuit board (310) close to the wireless communication module (34) through a wire.
5. The wireless remote control intelligent fire alarm according to claim 1, wherein the filter screen (2) comprises a filter screen body (21), four positioning holes (22) are uniformly formed in the outer side of the upper end of the filter screen body (21) in a ring shape, a first lamp hole (23) is formed in one side of the upper end of the filter screen body (21), and a second lamp hole (24) is formed in the other side of the upper end of the filter screen body (21).
6. The wireless remote control intelligent fire alarm according to claim 1, wherein the base (5) comprises a base shell (51), the bottom end of the inner side of the base shell (51) is annularly provided with a plurality of counter bores (54), the upper end of the inner side wall of the base shell (51) close to the counter bores (54) is fixedly connected with a limiting ring (53), and the outer side of the upper end of the base shell (51) is provided with an outer threaded opening (52).
7. The intelligent wireless remote control fire alarm according to claim 6, wherein the waterproof pad (4) is embedded in the lower end of the limiting ring (53), and the external thread opening (52) is engaged with the internal thread opening (17).
8. The intelligent fire alarm with wireless remote control as claimed in claim 3, wherein the first lamp hole (23) and the indicating lamp groove (15) are located on the same axis, the indicating lamp (35) is embedded inside the first lamp hole (23) and the indicating lamp groove (15) in sequence, the warning lamp (38) penetrates through the inside of the warning lamp hole (14), and the buzzer (312) is located at the lower end of the sounding groove (13).
9. The intelligent wireless remote control fire alarm according to claim 1, wherein the supporting column (311), the positioning hole (22) and the internal threaded column (16) are located on the same axis, and the outer shell (11), the filter screen body (21) and the bearing disc (31) are fixedly connected through the supporting column (311), the positioning hole (22) and the internal threaded column (16) in sequence through screws.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010196103.5A CN111179536A (en) | 2020-03-19 | 2020-03-19 | Wireless remote control's intelligent fire alarm |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010196103.5A CN111179536A (en) | 2020-03-19 | 2020-03-19 | Wireless remote control's intelligent fire alarm |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111179536A true CN111179536A (en) | 2020-05-19 |
Family
ID=70656749
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010196103.5A Withdrawn CN111179536A (en) | 2020-03-19 | 2020-03-19 | Wireless remote control's intelligent fire alarm |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111179536A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118196990A (en) * | 2024-05-16 | 2024-06-14 | 福建信息职业技术学院 | Electronic alarm |
-
2020
- 2020-03-19 CN CN202010196103.5A patent/CN111179536A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118196990A (en) * | 2024-05-16 | 2024-06-14 | 福建信息职业技术学院 | Electronic alarm |
| CN118196990B (en) * | 2024-05-16 | 2024-08-20 | 福建信息职业技术学院 | Electronic alarm |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111179536A (en) | Wireless remote control's intelligent fire alarm | |
| CN105931416A (en) | Independent photoelectric smoke sensing fire detection alarm | |
| CN205665846U (en) | Fuel gas alarm | |
| CN109035693B (en) | Multi-selection mode adult safety bracelet with traceable position | |
| CN108320413B (en) | Portable multipurpose fire self-rescue positioning alarm device | |
| CN201886573U (en) | Burglar alarm system with automatic alarm arming/disarming functions | |
| CN215643029U (en) | Alarm signal transmission device | |
| CN205594824U (en) | Be applied to intelligent alarm device of bathroom | |
| CN212658946U (en) | Clock for detecting and alarming carbon monoxide concentration | |
| CN212522804U (en) | Monitoring and early warning device for building fire fighting | |
| CN212933690U (en) | Building fire alarm device | |
| CN213070062U (en) | Smoke alarm | |
| CN209928575U (en) | Independent smoke detector based on Internet of things | |
| CN210895738U (en) | High-rise intelligent fire-fighting early-warning escape system | |
| CN104641973A (en) | Suspension flowerpot with fire alarming function | |
| CN209993070U (en) | Intelligent monitoring and alarming device for building fire fighting | |
| CN203838849U (en) | Outdoor tent safety alarm | |
| CN207686104U (en) | Integrated furred ceiling that integrated smog was reported to police | |
| CN211798448U (en) | Wisdom fire control apparatus possesses smoke gas sensor of locate function | |
| CN211604261U (en) | Detector is felt to intelligence cigarette | |
| CN210825024U (en) | Elevator with fire-fighting state feedback and timely position | |
| CN220152698U (en) | Fire emergency lamp with alarm function | |
| CN216793050U (en) | Fire acousto-optic alarm with built-in positioning structure for constructional engineering | |
| CN217008361U (en) | Fire alarm for hotel | |
| CN204965675U (en) | Smoke alarm |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20200519 |