CN207817917U - The smoke alarm being conveniently replaceable - Google Patents
The smoke alarm being conveniently replaceable Download PDFInfo
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- CN207817917U CN207817917U CN201721887778.4U CN201721887778U CN207817917U CN 207817917 U CN207817917 U CN 207817917U CN 201721887778 U CN201721887778 U CN 201721887778U CN 207817917 U CN207817917 U CN 207817917U
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- smoke alarm
- mounting base
- lower casing
- mounting groove
- alarm device
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Abstract
The utility model is related to the technical field of smoke alarm, the smoke alarm being conveniently replaceable, including smoke alarm device and the mounting base for being fixed at the positions such as metope are disclosed；Smoke alarm device includes upper casing and lower casing, and lower casing has away from the outer end of upper casing, and mounting groove is formed on the outer end of lower casing, and mounting base has the inner end towards lower casing, and installation snap-type is on the inner end of lower casing；The side wall of mounting groove is formed with through-hole, and installation buckle then extends and be bent to form grab towards the direction of the inner end away from mounting base, grab it is embedded or be detached from mounting groove through-hole when, smoke alarm device connection or disengaging mounting base.By the way that smoke alarm is divided into mounting base and smoke alarm device, mounting base is fixed at the positions such as metope, dismantling connection is formed between smoke alarm device and mounting base, is dismantled by movement, it is simple and convenient, make the maintenance to smoke alarm device and replaces more convenient.
Description
Technical field
The utility model is related to the technical field of smoke alarm, the smoke alarm that is especially conveniently replaceable.
Background technology
Smoke alarm is also known as fire hazard aerosol fog alarm, smoke sensor device etc., when fire occurs, in smoke alarm
Smoke sensing module senses that smog is exceeded, and to send out alarm, prompting personnel withdraw rapidly.
Currently, smoke alarm is stationarily connected to the positions such as metope, it is powered by cable, and is connected to master
Signal is passed to host and alarmed by machine when smoke alarm detects that smog is exceeded.
Existing smoke alarm is fixed on the positions such as metope, and is not equipped with individual power supply, in smoke alarm
When being installed on metope, the smoke alarm after damage is not easy to be replaced, and trouble is dismantled from the positions such as metope, no
Easily smoke alarm is overhauled, it is not noticeable after generation accident.
Utility model content
The utility model proposes the smoke alarm being conveniently replaceable, it is intended to propose that a kind of smog alarm easy to disassemble is set
It is standby, it is cumbersome for installation to solve the problems, such as that smoke alarm is dismantled.
The utility model is realized in this way the smoke alarm being conveniently replaceable, including smoke alarm device and fixation
Mounting base in positions such as metopes is set, dismantling connection structure is formed between the smoke alarm device and the mounting base,
The dismantling connection structure includes the installation buckle being formed in the mounting base and is formed on the smoke alarm device
Mounting groove；The smoke alarm device includes upper casing and lower casing, and the lower casing has away from the outer end of upper casing, described
Mounting groove is formed on the outer end of the lower casing, and the mounting base has the inner end towards the lower casing, the installation card
Button is formed on the inner end of the lower casing；The side wall of the mounting groove is formed with through-hole, and the installation buckle is then towards away from institute
The direction for stating the inner end of mounting base extends and has been bent to form grab, and the grab is embedded or is detached from logical in the mounting groove
Kong Shi, the smoke alarm device connect or are detached from the mounting base.
Further, the quantity of the mounting groove is multiple, and is centrosymmetric；The quantity of the installation buckle is more
It is a, and be centrosymmetric.
Further, the arc-shaped slot of the mounting groove, the arc-shaped extension of grab of the installation buckle, the installation buckle
When being embedded into the mounting groove, keeps the grab embedded by rotation or be disengaged to the through-hole of the mounting groove.
Further, the curved wall of the mounting groove extends tear strip, and the tear strip is connected to the through-hole, described
Grab wall is formed between grab and the mounting base, when the grab is embedded into the through-hole of the mounting groove, the grab wall
It is placed in the tear strip.
Further, the both sides of the extending direction of the grab are provided with resilient rubbber cushion.
Further, the mounting base and the lower casing are in the form of annular discs.
Further, multiple mounting grooves are arranged symmetrically centered on the center of circle of the discoid lower casing；It is more
A installation buckle is arranged symmetrically centered on the center of circle of the discoid mounting base.
Further, the periphery of the inner end of the mounting groove is formed with annular protrusion, the smoke alarm device and institute
When stating mounting base mating connection, the lower casing is embedded into the annular protrusion, and the periphery of the lower casing abuts the annular protrusion
Inner wall.
Further, there is folding lid, the folding lid to be connected to power module for the outer end of the lower casing.
Further, the power module is that the smoke alarm device is powered by installing battery.
Compared with prior art, the smoke alarm provided by the utility model being conveniently replaceable, by by smoke alarm
It is divided into mounting base and smoke alarm device, mounting base is fixed at the positions such as metope, smoke alarm device and mounting base
Between be formed with dismantling connection, smoke alarm device includes upper casing and lower casing, the installation buckle insertion being located in mounting base
Into in the mounting groove of lower casing, and by movement, the grab that installation card is buckled is made to be embedded among the through-hole of mounting groove, to
Realize being stably connected with for smoke alarm device and mounting base, and it is convenient move in the opposite direction, then realize dismounting.It solves
Smoke alarm dismantles problem cumbersome for installation.
Description of the drawings
Fig. 1 is the exploded perspective schematic diagram for the smoke alarm being easily installed that the utility model embodiment provides；
Fig. 2 is the solid of the outer end of the mounting base for the smoke alarm being easily installed that the utility model embodiment provides
Schematic diagram；
Fig. 3 is the stereochemical structure signal of the mounting base for the smoke alarm being easily installed that the utility model embodiment provides
Figure；
Fig. 4 is the stereochemical structure signal of the lower casing for the smoke alarm being easily installed that the utility model embodiment provides
Figure；
Fig. 5 is the stereochemical structure signal of the upper casing for the smoke alarm being easily installed that the utility model embodiment provides
Figure.
Specific implementation mode
In order to make the purpose of the utility model, technical solutions and advantages more clearly understood, below in conjunction with attached drawing and implementation
Example, the present invention will be further described in detail.It should be appreciated that specific embodiment described herein is only used to explain
The utility model is not used to limit the utility model.
The realization of the utility model is described in detail below in conjunction with specific embodiment.
The same or similar label correspond to the same or similar components in the attached drawing of the present embodiment；In retouching for the utility model
In stating, it is to be understood that if it is based on attached drawing to have the orientation or positional relationship of the instructions such as term "upper", "lower", "left", "right"
Shown in orientation or positional relationship, be merely for convenience of describing the present invention and simplifying the description, rather than indicate or imply institute
The device or element of finger must have a particular orientation, with specific azimuth configuration and operation, therefore position described in attached drawing is closed
The term of system only for illustration, should not be understood as the limitation to this patent, for those of ordinary skill in the art and
Speech, can understand the concrete meaning of above-mentioned term as the case may be.
It is preferred embodiment provided by the utility model shown in Fig. 5.
Smoke alarm provided in this embodiment includes mounting base 12 and smoke alarm device 11, and mounting base 12 is fixed
In positions such as metopes, mounting base 12 is formed with dismantling connection structure with smoke alarm device 11, and smoke alarm device 11 has court
To the back of mounting base 12, dismantling connection structure includes the installation buckle 121 being formed in mounting base 12 and is formed in smog
The mounting groove 131 at 11 back of warning device, installation buckle 121, which is embedded into mounting groove 131 or is detached from mounting groove 131, realizes mounting base
12 with the dismantling connection of smoke alarm device 11, replaced or overhauled to facilitate to disassemble smoke alarm device 11.
Specifically, smoke alarm device 11 includes upper casing 14 and lower casing 13, mounting groove 131 be formed in lower casing 13 towards away from
Be the outer end of lower casing 13 on the direction of upper casing 14, mounting groove 131 towards mounting base 12 square upward opening and to upper casing 14
Direction is recessed, also, has through-hole in the side of the internal side wall of mounting groove 131, penetrates through the lower casing 13 of smoke alarm device 11；
And buckle 121 is installed and is then formed in mounting base 12 towards one end of smoke alarm device 11, that is, it is set as the inner end of mounting base 12
One end, installation buckle 121 towards away from mounting base 12 inner end direction tilt extend after and towards side edge bending, continue to extend
Grab 1211 is formed, when carrying out installation smoke alarm device 11,121 docking of installation buckle is embedded into mounting groove 131, so
After move smoke alarm device 11, so that the grab 1211 on installation buckle 121 is moved into the through-hole in mounting groove 131, to real
Now fix.
In the present embodiment, the formation of lower casing 13 has including multiple centrosymmetric mounting grooves 131 and multiple central symmetries
Installation buckle 121, in the present embodiment, give two centrosymmetric mounting grooves 131, i.e. two mounting grooves 131 it is interior
Portion opens up through-hole towards opposite side wall, while also tool is there are two centrosymmetric installation buckle 121 in mounting base 12, i.e., two
Installation buckle 121 is bent in the opposite direction, the grab 1211 extended in the opposite direction is formed, in order to make two above-mentioned grabs
1211 also cross the through-hole in two mounting grooves 131, and 131 arc-shaped slot of above-mentioned mounting groove, through-hole is then formed in and curved side
On the perpendicular side wall of wall, while the also arc-shaped extension of grab 1211, the docking of the grab of arc 1211 is embedded into arc in this way
Mounting groove 131 in when, smoke alarm device 11 is directly rotated, you can realize two grabs 1211 move and be embedded into respectively
Through-hole in two mounting grooves 131, to make smoke alarm device 11 be stably connected in mounting base 12 and by rotating i.e.
Can easy removal, in order to replace.
In addition, continuing to be extended with arc on the arcwall of mounting groove 131 towards on through-hole direction in above-mentioned mounting groove 131
The tear strip 132 of shape, tear strip 132 are formed on the shell of lower casing 13, and tear strip 132 communicates with through-hole and is connected to cigarette
The inside of mist warning device 11；Meanwhile there is the card being connect with the inner end of mounting base 12 in the grab 1211 of installation buckle 121
Hook wall 1212, will install buckle 121 docked with mounting groove 131 when, it is corresponding when grab 1211 is embedded into through-hole, block
Hook wall 1212 passes through tear strip 132, to realize being stably connected with for smoke alarm device 11 and mounting base 12, thus it is possible, on the one hand,
The limitation of tear strip 132 in a strip shape can grab wall 1212 move up and down so that more firm, the another aspect grab wall of the two connection
1212 are used as a supporting roles, it is therefore prevented that the grab 1211 for bending extension is long and the problem of easily snap off.
Above-mentioned tear strip 132 can be arranged in the curved wall of the both sides up and down of mounting groove 131, corresponding, card
Hook wall 1212 can also be formed in both sides up and down, and what is connected in this way more stablizes, and grab 1211 is more firm.
Above-mentioned installation buckle 121 and the arrangement relation of mounting groove 131 is only a kind of mode provided in this embodiment, at it
In his embodiment, installation buckle 121 can be arranged on lower casing 13, and mounting groove 131 can then be arranged in the interior of mounting base 12
On end, this arrangement of the present embodiment can be bonded and the positions such as metope to make mounting base 12 more.
In addition, flexible rubber pad is arranged in the both sides of the extending direction of the grab 1211 of installation buckle 121, by cigarette
After mist warning device 11 is stably connected with mounting base 12, elastic rubber pad abuts the outer end of lower casing 13, prevents smog alarm
Equipment 11 is moved in mating connection after mounting base 12, and connection is made more to stablize.
The lower casing 13 and mounting base 12 of smoke alarm device 11 provided in this embodiment are peaces in the form of annular discs, above-mentioned
Seat 12 and mounting groove 131 are filled then centered on the discoidal center of circle, is centrosymmetrically arranged, is looked for facilitating when making
The position of mounting groove 131 and installation buckle 121 is arranged to the stable center of circle.
Also, the outer end projection of lower casing 13 in the form of annular discs is on lower casing 13, and the periphery of the inner end of mounting groove 131
It is then formed with annular protrusion 122, annular protrusion 122 is arranged around the periphery of discoid mounting groove 131, by smog alarm
When equipment 11 is mounted in mounting base 12, the outer end of protrusion is embedded just below in the inside of annular protrusion 122, the periphery of lower casing 13
The inner wall for abutting annular protrusion 122 makes the two be stably connected with, while lower casing 13 in the form of annular discs is convenient in annular protrusion 122
It is rotated, so that grab 1211 passes through through-hole, stablizes cooperation.
There is folding lid 133, the folding lid 133 to be connected to the power module in smoke alarm device 11 on lower casing 13
19, power module 19 is that smoke alarm device 11 is powered, in this way, smoke alarm device 11 is mounted in mounting base 12
When, lower casing 13 and the inner end of mounting base 12 fit closely, and prevent folding lid 133 to be exposed to outer, power module 19 is by installing
Battery is that smoke alarm device 11 is powered, when needing replacing battery, it is only necessary to rotate smoke alarm device 11
Dismounting, is replaced from lower casing 13.Power module 19 is provided separately in smoke alarm device 11, the smoke alarm device is made
11 repairs are more convenient, and are not needing cable, when power is off, can also be used, more convenient.
In addition, having the fixed structure being fixed on metope in mounting base 12, which includes two interval cloth
The inner end of the runway shape fixed groove 123 set, fixed groove 123 towards mounting base 12 is open, also, two fixed grooves
123 vertical directions are arranged, and circular through hole 1231 are respectively formed in the lower end of two fixed grooves 123, in fixed groove
123 upper end is formed with strip through-hole 1232, and strip through-hole 1232 is connected to downwards circular through hole 1231, and circular through hole 1231 can
It is passed through for the head of screw, strip through-hole 1232 can be passed through for the end of screw, in this way, fixing two screws on metope
Afterwards, two circular through holes 1231 are each passed through to the head of screw, then mounting base 12 is moved down, the end of screw is made to pass through
Strip through-hole 1232, and the head of screw then abuts the inner wall of fixed groove 123, and mounting base 12 is made to be fixedly connected on metope etc.
Position.
In the present embodiment, the side wall of fixed groove 123 is tilted towards the strip through-hole 1232 in fixed groove 123, due to
The inner face of the end towards screw on the head of screw is inclined, just coordinates the inclined side of fixed groove 123 in this way
Wall, to make connection more stablize.
In addition, the position of fixed screw is different on metope in order to prevent and so that mounting base 12 is fixed unstable, installing
The outer end of seat 12 is equipped with fixed block 16, is formed on fixed block 16 same as circular through hole 1231 and strip through-hole 1232
Two fixed blocks 16 are corresponded to fixed groove 123 and are fixedly connected by fixed hole respectively, are bonded with metope with to change mounting base 12
Distance stablizes fitting to enable the head of screw to be embedded just below into fixing groove.
In order to which the upper casing 14 and the installation of lower casing 13 of realizing smoke alarm device 11 are fixed, upper casing 14 is in the form of annular discs, upper casing
14 have the connection bump towards the protrusion of lower casing 13 towards the periphery of the inner end of lower casing 13, in lower casing 13 towards the inner end of upper casing 14
There is link slot, connection bump to be embedded into link slot for the periphery in portion, and upper casing 14 and the periphery of lower casing 13 contact, and upper
The inside of 14 connection bump of shell is formed with multiple connection buckles 144 towards 13 diffraction of lower casing, in the inside of the link slot of lower casing 13
It is formed with connection fin 134, the middle part hollow out of connection buckle 144, connection fin 134 passes through void region, and abuts and connect
Buckle 144, realization upper casing 14 are fixedly connected with lower casing 13.
Also, there is connection through-hole 135 on lower casing 13, when connection fin 134 is clamped connection buckle 144, connection
Buckle 144 passes through connection through-hole 135, this is can be by stirring the connection buckle 144 across 135 part of connection through-hole come to upper
Shell 14 is dismantled with lower casing 13.
In addition, upper casing 14 has then is provided with multiple Smoke Detection holes 142 on the outer end of lower casing 13, outer end,
It is equipped with smoke monitoring module 17 in the inner end of upper casing 14, Smoke Detection hole 142 is then connected to Smoke Detection module, and inside
End is additionally provided with alarm modules 18, and smoke monitoring module 17 is electrically connected with alarm modules 18, when smog is more than certain standard
When, alarm modules 18 send out alarm and reminding personnel and withdraw.
Also, there is the speaker hole 143 for being connected to 14 inner end alarm modules 18 of upper casing, alarm in the outer end of upper casing 14
Module 18 sends out alarm and is withdrawn from the outflow alarm personnel of speaker hole 143.
In the present embodiment, in the outer end of upper casing 14 there is switch button 141, switch button 141 to be connected to upper casing 14
Internal circuit board, for turning off or on the smoke alarm device 11, saving electricity, while part being prevented to be safe from danger
In the case of, smoke alarm device 11 is constantly alarmed, the switch button 141 of setting more preferably to the smoke alarm device
11 are controlled.
Specifically, being switch button 141 at the middle part of 14 outer end of upper casing, which includes flaky
Switchboard and in the form of sheets connection sheet, connection sheet is formed in the both sides of switchboard, also, the connection sheet of both sides supports or opposes from switchboard
Direction extend, then the connection sheet of both sides bends and extends in the same direction, and is fixedly connected on the shell of upper casing 14, on
The shell of shell 14 is formed with switch through-hole identical with 141 shape of switch button, and switch through-hole is connected to the inner end of upper casing 14,
And switch button 141 is in concordant shape with the outer end of upper casing 14, in this way, by pressing switchboard, the connection of switchboard both sides
Sector-meeting is tilted to the inner end of upper casing 14, and switchboard can abut the button on internal circuit board, to make the smoke alarm device
11 are turned on or off；After trip switch plate, the connecting plate being connect with the shell of upper casing 14 can be because flexible deformation becomes again originally
Appearance, i.e. switchboard is detached from the button on circuit board, and switchboard keeps, such cloth concordant with the outer end of upper casing 14 again
It sets mode no longer to need in addition to add switch button 141, is directly integrally formed switch button 141 and shell, simplify technique.
In addition, the crooked place of above-mentioned connection sheet is vertically bent, in this way, when pressing switchboard, connection sheet
It tilts directly down and flexible deformation occurs, required power smaller, and reply rapider.
Meanwhile there are gaps between switch through-hole and switch button 141, it is more convenient in this way to press down on switchboard.
In addition, at the link position of connection sheet and the shell of upper casing 14, the both sides of connection sheet arc in the opposite direction
Transition, then the shell with upper casing 14 be attached, in this way, larger in link position width, prevent from, when pressing switchboard, making
It is broken at the link position of connection sheet and shell.
It is also pasted with cover sheet on the outer end of upper casing 14, has and smoke monitoring hole and speaker hole in cover sheet
143 corresponding through-holes, indicating positions and the smoke alarm device 11 in cover sheet with switch button 141 are mounted on installation
The instruction such as rotary switch direction of seat 12 information, cover sheet, which is directly carried out bonding, can be attached on the outer end of upper casing 14,
In this way, after a protracted use, the instruction information wears of cover sheet, the cover sheet directly more renewed can be indicated again
Each instruction information.
In addition, the middle part of above-mentioned cover sheet has switch instruction information, and the middle part arc of cover sheet outwardly protrudes,
It is equipped with rubber cushion in the inner mast of cover sheet, rubber cushion is connected on switchboard, right by pressing the arcuate projections point in cover sheet
It answers, you can pressing switchboard, it is simple and convenient to be switched to the smoke alarm device 11, and be easier to find out
The position of pass.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
All any modification, equivalent and improvement etc., should all be included in the protection scope of the present invention made by within refreshing and principle.
Claims (10)
1. the smoke alarm being conveniently replaceable, which is characterized in that including smoke alarm device and be fixed at wall locations
Mounting base, dismantling connection structure, the dismantling connection structure are formed between the smoke alarm device and the mounting base
The mounting groove for buckling and being formed on the smoke alarm device including the installation being formed in the mounting base；The smog
Warning device includes upper casing and lower casing, and the lower casing has away from the outer end of upper casing, and the mounting groove is formed in described
On the outer end of lower casing, the mounting base has the inner end towards the lower casing, and the installation snap-type is in the lower casing
Inner end on；The side wall of the mounting groove is formed with through-hole, and the installation buckle is then towards the inner end for deviating from the mounting base
Direction extend and be bent to form grab, the grab it is embedded or be detached from the mounting groove through-hole when, the smog report
Alert equipment connection is detached from the mounting base.
2. the smoke alarm being conveniently replaceable as described in claim 1, which is characterized in that the quantity of the mounting groove is more
It is a, and be centrosymmetric；The quantity of the installation buckle is multiple, and is centrosymmetric.
3. the smoke alarm being conveniently replaceable as claimed in claim 1 or 2, which is characterized in that the arc-shaped slot of mounting groove,
The grab arc-shaped extension of the installation buckle makes the card when installation buckle is embedded into the mounting groove by rotation
Hook is embedded or is disengaged to the through-hole of the mounting groove.
4. the smoke alarm being conveniently replaceable as claimed in claim 3, which is characterized in that the curved wall of the mounting groove prolongs
Pig's tongue is stretched out, the tear strip is connected to the through-hole, and grab wall, the card are formed between the grab and the mounting base
When hook is embedded into the through-hole of the mounting groove, the grab wall is placed in the tear strip.
5. the smoke alarm being conveniently replaceable as claimed in claim 1 or 2, which is characterized in that the extending direction of the grab
Both sides be provided with resilient rubbber cushion.
6. the smoke alarm being conveniently replaceable as claimed in claim 2, which is characterized in that the mounting base and the lower casing
It is in the form of annular discs.
7. the smoke alarm being conveniently replaceable as claimed in claim 6, which is characterized in that multiple mounting grooves are with the circle
It is arranged symmetrically centered on the center of circle of the lower casing of plate-like；Multiple installation buckles are with the center of circle of the discoid mounting base
Centered on be arranged symmetrically.
8. the smoke alarm being conveniently replaceable as claimed in claim 7, which is characterized in that outside the inner end of the mounting groove
It is formed with annular protrusion week, when the smoke alarm device is connected with the mounting base, the lower casing is embedded into the ring
Shape protrusion, the periphery of the lower casing abuts the inner wall of the annular protrusion.
9. the smoke alarm being conveniently replaceable as claimed in claim 1 or 2, which is characterized in that the outer end of the lower casing has
There are folding lid, the folding lid to be connected to power module.
10. the smoke alarm being conveniently replaceable as claimed in claim 9, which is characterized in that the power module is by installing
Battery is that the smoke alarm device is powered.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721887778.4U CN207817917U (en) | 2017-12-27 | 2017-12-27 | The smoke alarm being conveniently replaceable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721887778.4U CN207817917U (en) | 2017-12-27 | 2017-12-27 | The smoke alarm being conveniently replaceable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207817917U true CN207817917U (en) | 2018-09-04 |
Family
ID=63327538
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721887778.4U Active CN207817917U (en) | 2017-12-27 | 2017-12-27 | The smoke alarm being conveniently replaceable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207817917U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109215277A (en) * | 2018-11-21 | 2019-01-15 | 刘强 | A kind of intelligent city's fire alarm equipment |
| CN110082988A (en) * | 2019-04-30 | 2019-08-02 | 重庆盾银科技有限公司 | Hand-held evidence-obtaining system and its evidence collecting method for trace evidence evidence obtaining |
| CN110360495A (en) * | 2019-07-04 | 2019-10-22 | 深圳民爆光电股份有限公司 | A kind of LED light easy for installation |
| CN111784959A (en) * | 2020-06-24 | 2020-10-16 | 深圳市海曼科技股份有限公司 | Electric shock prevention smoke alarm and use method thereof |
-
2017
- 2017-12-27 CN CN201721887778.4U patent/CN207817917U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109215277A (en) * | 2018-11-21 | 2019-01-15 | 刘强 | A kind of intelligent city's fire alarm equipment |
| CN110082988A (en) * | 2019-04-30 | 2019-08-02 | 重庆盾银科技有限公司 | Hand-held evidence-obtaining system and its evidence collecting method for trace evidence evidence obtaining |
| CN110360495A (en) * | 2019-07-04 | 2019-10-22 | 深圳民爆光电股份有限公司 | A kind of LED light easy for installation |
| CN111784959A (en) * | 2020-06-24 | 2020-10-16 | 深圳市海曼科技股份有限公司 | Electric shock prevention smoke alarm and use method thereof |
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