CN108230693A - A kind of improved road speed measuring device - Google Patents
A kind of improved road speed measuring device Download PDFInfo
- Publication number
- CN108230693A CN108230693A CN201711107315.6A CN201711107315A CN108230693A CN 108230693 A CN108230693 A CN 108230693A CN 201711107315 A CN201711107315 A CN 201711107315A CN 108230693 A CN108230693 A CN 108230693A
- Authority
- CN
- China
- Prior art keywords
- slot
- tachymeter
- pedestal
- speed measuring
- ring disk
- 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- Withdrawn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
Classifications
-
- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/01—Detecting movement of traffic to be counted or controlled
- G08G1/052—Detecting movement of traffic to be counted or controlled with provision for determining speed or overspeed
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Force Measurement Appropriate To Specific Purposes (AREA)
Abstract
The invention discloses a kind of improved road speed measuring devices,Including the pedestal being arranged on road stent and the tachymeter being connected with the pedestal,The slot to extend upwards is provided on the pedestal bottom surface,Tachymeter locking is secured in the present invention,And pedestal can rotate and tachymeter rotary speed measuring is driven to capture,By being powered again to tachymeter after first being locked to tachymeter during installation,Tachymeter is unlocked again after first being powered off during dismounting to tachymeter,Whole device is easy to operate,And secondary locking is carried out to inserted block by the second the ring disk,Increase the stability of tachymeter locking,Whole device provides dynamic power by a motor and can be realized,Reduce input cost,Considerably increase the installation and removal efficiency of tachymeter,It effectively prevents that electric shock accidents occurs when mounting and dismounting tachymeter,The life security of staff is ensured.
Description
Technical field
The present invention relates to velocity measuring technique field, more particularly to a kind of improved road speed measuring device.
Background technology
To ensure road safety, vehicle supervision department needs to limit the travel speed of motor vehicle, in addition to everywhere may be used
The speed(-)limit sign seen will be equipped with vehicle speed measuring instrument, extremely short on urban road and highway every a distance
The travel speed for the vehicle that detection is passed through in time.Vehicle speed measuring instrument is typically mounted at higher-height street lamp or special stand
On, it is therefore desirable to staff ascends a height maintenance and installation, this require vehicle speed measuring instrument should fast and easy effortlessly install and
It is fixed well, loosening is caused to fall with Anti-blow-open, vehicle speed measuring instrument on the market does not have this speciality at present, but needs
It is fastened by fixing pieces such as screws, it is inconvenient, it is time-consuming and laborious, and existing vehicle speed measuring instrument is all to be first coupled to electricity again
Fixed, there are security risks.
Invention content
The technical problem to be solved in the present invention is to provide a kind of improved road speed measuring devices, can solve above-mentioned present
The problems in technology.
To solve the above problems, the present invention adopts the following technical scheme that：
A modification of the present invention type road speed measuring device is matched including the pedestal being arranged on road stent and with the pedestal
The tachymeter of connection is closed, the slot to extend upwards is provided on the pedestal bottom surface, is provided with to the right in the slot right side wall
The first slide slot to extend is provided with the second slide slot in the first slide slot upper side wall, is set in the slot left side wall
There is a side slot, the side slot left side wall is provided centrally with to electric end, and being provided in first slide slot can control what is slided
Perpendicular push plate, the perpendicular push plate upper end is extended and injected in second slide slot upwards to be connected, in second slide slot
It is provided with the perforation perpendicular push plate upper end and the motor power with being arranged in the second slide slot right side wall connect
Spiral shell shape bar is additionally provided with the inserting column being fixedly connected with the perpendicular push plate left side center in first slide slot, the inserting column
Outer shroud closes on right end position and is fixedly installed the first the ring disk, and the first the ring disk left side outer shroud is fixedly installed the second the ring disk, institute
State the inserting column left side be provided centrally with to first conductive part compressed to electric end, close on centre bit below the inserting column
The place of putting is provided with first to electric end, above the tachymeter on be provided with inserted block to be connected with the slot, it is described
Inserted block center or so perforation is provided with so that the inserting column passes through and slides the straight slot of mating connection, straight slot both sides up and down
The center of wall is correspondingly arranged on the second conductive part to be compressed with described first to electric end, is located on the inserted block right side described
The outer shroud of straight slot is provided with the annular groove to be connected with second the ring disk, and the inserting column left distal end is correspondingly arranged up and down
There is the first inclined socket surface, the inserted block top end surface or so to be correspondingly arranged on the second inclined socket surface, left and right correspondence is set before the pedestal
Side protective plate is equipped with, the pedestal forward top is fixedly installed protective plate, the upper protective plate and the side protective plate phase
Connection, pedestal bottom rotatable engagement are connected with shaft, and the shaft bottom is provided with fixed station, is embedded in the fixed station
There is steer motor, the shaft is connected with the steer motor power, and the fixed station bottom is provided with for card
The clamping lock locked on road stent is buckled, and breaker device is provided in the installing matrix.
As preferred technical solution, the perpendicular push plate upper end is provided with spiral shell shape hole, the spiral shell shape hole and the spiral shell shape
Bar whorl is connected, the spiral shell shape bar left end and the rotatable mating connection of the second slide slot left side wall.
As preferred technical solution, the lower end of the slot is provided with the first oblique surface, the side slot right end setting
There is the second oblique surface, the straight slot right end is provided with third oblique surface, and the right end of the annular groove is provided with the 4th oblique surface.
As preferred technical solution, the first the ring disk right side is mutually compressed with the perpendicular push plate left side.
Described to be electrically connected to electricity Duan Yu cities as preferred technical solution, first conductive part is given with described first
Electric end is electrically connected, and second conductive part is electrically connected with the tachymeter.
As preferred technical solution, the breaker device includes the peace being fixed in the installing matrix inner wall
If chamber, described install sets having air switch in chamber, and the circuit breaker left side is fixedly installed door body.
The beneficial effects of the invention are as follows：
1. by the way that inserted block is injected in slot, when being compressed above inserted block with the upper side wall of slot, inserted block is just matched with slot
Connection is closed, the second the ring disk is in relative status with annular groove, and the perpendicular push plate of electric motor operation rotation driving is then controlled to slide to the left, is erected
Push plate is slided to the left to be pushed inserting column, the first the ring disk and the second the ring disk while slides to the left, when perpendicular push plate slides into the second cunning to the left
During the left end position of row slot, inserting column has already passed through straight slot and injects in side slot and is connected, slotting so as to which inserted block be locked in
In slot, the second the ring disk, which is then injected in annular groove, to be connected, so as to carry out secondary locking to inserted block by the second the ring disk, at this point, the
One conductive part to electric end with compressing energization, and first compresses energization to electric end and the second conductive part, and tachymeter is now in locking shape
State is also at energized state, so as to increase the installation effectiveness of tachymeter so that the locking of tachymeter is secured, and the safety that is powered is steady
It is fixed.
2. by holding tachymeter, electric motor operation reversion is then controlled, so that perpendicular push plate is slided to the right, is pushed away when perpendicular
When plate slides into the right the right end position of the first slide slot and the second slide slot, so that the present apparatus is restored to initial bit
State is put, first is powered off to electric end and inserted block is unlocked, inserted block is finally extracted from slot can be realized tachymeter
Dismounting, so as to increase the removal efficiency of tachymeter, the dismounting and change after being damaged convenient for tachymeter.
3. tachymeter locking is secured in the present invention, and pedestal can rotate and tachymeter rotary speed measuring is driven to capture, installation
When by being powered again to tachymeter after first being locked to tachymeter, when dismounting first tachymeter is powered off after again to surveying
Fast instrument is unlocked, and whole device is easy to operate, and carries out secondary locking to inserted block by the second the ring disk, increases survey
The stability of fast instrument locking, whole device provide dynamic power by a motor and can be realized, and reduce input cost, significantly
The installation and removal efficiency of tachymeter is increased, effectively prevents that electric shock accidents occurs when mounting and dismounting tachymeter, is ensured
The life security of staff.
Description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, to embodiment or will show below
There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention, for those of ordinary skill in the art, without creative efforts, can be with
Other attached drawings are obtained according to these attached drawings.
Fig. 1 is the external overall structure diagram of pedestal in the present invention；
Fig. 2 is sectional view at A-A in Fig. 1；
Fig. 3 is the structure diagram of tachymeter in the present invention；
Fig. 4 is the overall structure diagram of improved road speed measuring device of the present invention.
Specific embodiment
The preferred embodiment of the present invention is described in detail below in conjunction with the accompanying drawings, so that advantages and features of the invention energy
It is easier to be readily appreciated by one skilled in the art, so as to make a clearer definition of the protection scope of the present invention.
Refering to shown in Fig. 1-4, a modification of the present invention type road speed measuring device, including the seat being arranged on road stent
Body 2 and the tachymeter 1 being connected with the pedestal 2, are provided with the slot 20 to extend upwards, institute on 2 bottom surface of pedestal
The first slide slot 3 for being provided in 20 right side wall of slot and extending to the right is stated, second is provided in 3 upper side wall of the first slide slot
Slide slot 4 is provided with side slot 5 in 20 left side wall of slot, and 5 left side wall of side slot is provided centrally with to electric end 51,
The perpendicular push plate 30 that can be controlled and slide is provided in first slide slot 3, perpendicular 30 upper end of push plate is extended upwards and reeve institute
State and be connected in the second slide slot 4, be provided in second slide slot 4 perforation perpendicular 30 upper end of push plate and with setting
The spiral shell shape bar 41 of 42 power connector of motor in 4 right side wall of the second slide slot is also set up in first slide slot 3
There is the inserting column 31 being fixedly connected with perpendicular 30 left side center of push plate, the outer shroud of the inserting column 31 closes on right end position fixed setting
There is the first the ring disk 32,32 left side outer shroud of the first the ring disk is fixedly installed the second the ring disk 33, and 31 left side center of inserting column is set
It is equipped with to first conductive part 34 compressed to electric end 51, the center position that closes below the inserting column 31 is provided with
First is provided with the inserted block 10 to be connected with the slot 20, the inserted block to electric end 36, the tachymeter 1 on above
10 centers or so perforation is provided with so that the inserting column 31 passes through and slides the straight slot 11 of mating connection, and the straight slot is about 11
The center of two side is correspondingly arranged on the second conductive part 13 to be compressed with described first to electric end 36,10 right side of inserted block
The upper outer shroud positioned at the straight slot 11 is provided with the annular groove 12 to be connected with second the ring disk 33, and the inserting column 31 is left
Being correspondingly arranged on the first inclined socket surface 311,10 top end surface of inserted block or so is correspondingly arranged on the second inclined socket surface up and down for side end
101, the 2 front left and right of pedestal is correspondingly arranged on side protective plate 22, and 2 forward top of pedestal is fixedly installed protective plate
23, the upper protective plate 23 is connected with the side protective plate 22, and the 2 bottom rotatable engagement of pedestal is connected with shaft 24, institute
State 24 bottom of shaft and be provided with fixed station 25, be embedded with steer motor in the fixed station 25, the shaft 24 with described turn
It is connected to motor power, 25 bottom of fixed station is provided with buckles 26 for clamping lock of the clamping lock on road stent, institute
It states in installing matrix 2 and is provided with breaker device.
Wherein, 30 upper end of perpendicular push plate is provided with spiral shell shape hole, and the spiral shell shape hole is matched with 41 whorl of spiral shell shape bar
Connection, 41 left end of spiral shell shape bar and the rotatable mating connection of 4 left side wall of the second slide slot are closed, so as to by described electronic
Spiral shell shape bar 41 described in the offer power drive of machine 42 rotates.
Wherein, the lower end of the slot 20 is provided with the first oblique surface 21, by described in first oblique surface 21 convenience
Inserted block 10 is quickly injected in the slot 20 and is connected, and 5 right end of side slot is provided with the second oblique surface 52, by described
Second oblique surface 52 facilitates the inserting column 31 quickly to inject in the side slot 5 to be connected, and 11 right end of straight slot is provided with
Third oblique surface 111 facilitates the inserting column 31 to pass rapidly through the straight slot 11, the annular groove by the third oblique surface 111
12 right end is provided with the 4th oblique surface 121, second the ring disk 33 is facilitated quickly to inject institute by the 4th oblique surface 121
It states and is connected in annular groove 12.
Wherein, 32 right side of the first the ring disk is mutually compressed with perpendicular 30 left side of push plate, first the ring disk 32 and institute
State 33 integral structure of the second the ring disk.
Wherein, described to be electrically connected to electricity Duan51Yu cities, first conductive part 34 is electrical to electric end 36 with described first
Connection, second conductive part 13 are electrically connected with the tachymeter 1, so that power supply safety is stablized.
Wherein, the breaker device, which includes being fixed in 2 inner wall of installing matrix, installs chamber 201, described
Setting having air switch 202 in chamber 201 is installed, 202 left side of circuit breaker is fixedly installed door body 203, there is fortuitous event
When the generation of electric leakage electric shock accident can be prevented by the 202 timely disconnecting circuit of circuit breaker.
In initial position, the motor 42 is in stop working state, and the perpendicular push plate 30 is located at described the
The right end position of one slide slot 3 and second slide slot 4, the inserting column 31, the first the ring disk 32 and the second the ring disk 33 are
In first slide slot 3, first conductive part 34 is in relative status with described to electric end 51, and the inserting column 31 is left
End is in relative status with the side slot 5, and described first is in off-position to electric end 36.
When needing to install tachymeter 1, first the inserted block 10 with the slot 20 is aligned, then pushes up the survey
Fast instrument 1 so that the inserted block 10 is injected in the slot 20, is supported above the inserted block 10 with the upper side wall of the slot 20
During pressure, the inserted block 10 is just connected with the slot 20, at this point, at 5 three of the inserting column 31, straight slot 11 and side slot
In relative status, second the ring disk 33 is in relative status with the annular groove 12, then controls the work of motor 42 rotation
Turn, the work of motor 42 rotation drives the spiral shell shape bar 41 to rotate, and the rotation of spiral shell shape bar 41 drives the perpendicular push plate 30
It slides to the left, the perpendicular push plate 30 is slided to the left to be pushed the inserting column 31, the first the ring disk 32 and the second the ring disk 33 while slide to the left
Row, when the perpendicular push plate 30 slides into the left end position of second slide slot 4 to the left, controls the motor 42 to stop
Work, the inserting column 31 has already passed through the straight slot 11 and injects in the side slot 5 and is connected at this time, so as to described will insert
Block 10 is locked in the slot 20, and second the ring disk 33 is then injected in the annular groove 12 and is connected, so as to by described
Second the ring disk 33 to the inserted block 10 carry out secondary locking, at this point, first conductive part 34 with it is described to electricity end 51 compress it is logical
Electricity, described first compresses energization to electric end 36 with second conductive part 13, and the tachymeter 1 is now in lock-out state and also locates
In energized state.
When needing to dismantle tachymeter 1, the tachymeter 1 is held, the motor 42 is then controlled to work instead
Turn so that the perpendicular push plate 30 is slided to the right, when the perpendicular push plate 30 slide into the right first slide slot 3 with
And second slide slot 4 right end position when so that the present apparatus is restored to initial position, by described first
It is powered off to electric end 36 and so that the inserted block 10 unlocks, the inserted block 10 is finally extracted from the slot 20 can be realized and test the speed
The dismounting of instrument 1.
The beneficial effects of the invention are as follows：
1. by the way that inserted block is injected in slot, when being compressed above inserted block with the upper side wall of slot, inserted block is just matched with slot
Connection is closed, the second the ring disk is in relative status with annular groove, and the perpendicular push plate of electric motor operation rotation driving is then controlled to slide to the left, is erected
Push plate is slided to the left to be pushed inserting column, the first the ring disk and the second the ring disk while slides to the left, when perpendicular push plate slides into the second cunning to the left
During the left end position of row slot, inserting column has already passed through straight slot and injects in side slot and is connected, slotting so as to which inserted block be locked in
In slot, the second the ring disk, which is then injected in annular groove, to be connected, so as to carry out secondary locking to inserted block by the second the ring disk, at this point, the
One conductive part to electric end with compressing energization, and first compresses energization to electric end and the second conductive part, and tachymeter is now in locking shape
State is also at energized state, so as to increase the installation effectiveness of tachymeter so that the locking of tachymeter is secured, and the safety that is powered is steady
It is fixed.
2. by holding tachymeter, electric motor operation reversion is then controlled, so that perpendicular push plate is slided to the right, is pushed away when perpendicular
When plate slides into the right the right end position of the first slide slot and the second slide slot, so that the present apparatus is restored to initial bit
State is put, first is powered off to electric end and inserted block is unlocked, inserted block is finally extracted from slot can be realized tachymeter
Dismounting, so as to increase the removal efficiency of tachymeter, the dismounting and change after being damaged convenient for tachymeter.
3. tachymeter locking is secured in the present invention, and pedestal can rotate and tachymeter rotary speed measuring is driven to capture, installation
When by being powered again to tachymeter after first being locked to tachymeter, when dismounting first tachymeter is powered off after again to surveying
Fast instrument is unlocked, and whole device is easy to operate, and carries out secondary locking to inserted block by the second the ring disk, increases survey
The stability of fast instrument locking, whole device provide dynamic power by a motor and can be realized, and reduce input cost, significantly
The installation and removal efficiency of tachymeter is increased, effectively prevents that electric shock accidents occurs when mounting and dismounting tachymeter, is ensured
The life security of staff.
Basic principle, main feature and the advantages of the present invention of the present invention has been shown and described above.The technology of the industry
Personnel are it should be appreciated that the present invention is not limited to the above embodiments, and the above embodiments and description only describe this
The principle of invention, various changes and improvements may be made to the invention without departing from the spirit and scope of the present invention, these changes
Change and improvement all fall within the protetion scope of the claimed invention.The claimed scope of the invention by appended claims and its
Equivalent defines.
Claims (6)
1. a kind of improved road speed measuring device is connected including the pedestal being arranged on road stent and with the pedestal
Tachymeter, it is characterised in that：The slot to extend upwards is provided on the pedestal bottom surface, is provided in the slot right side wall
The first slide slot to extend to the right, is provided with the second slide slot in the first slide slot upper side wall, in the slot left side wall
It is provided with side slot, the side slot left side wall is provided centrally with to electric end, and cunning can be controlled by being provided in first slide slot
Capable perpendicular push plate, the perpendicular push plate upper end is extended and injected in second slide slot upwards to be connected, and described second slides
The perforation perpendicular push plate upper end is provided in slot and the motor power with being arranged in the second slide slot right side wall connects
The spiral shell shape bar connect is additionally provided with the inserting column being fixedly connected with the perpendicular push plate left side center in first slide slot, described to insert
The outer shroud of column closes on right end position and is fixedly installed the first the ring disk, and the first the ring disk left side outer shroud is fixedly installed the second ring
Disk, the inserting column left side are provided centrally with to first conductive part compressed to electric end, closing below the inserting column
Center position is provided with first to electric end, above the tachymeter on be provided with it is slotting to be connected with the slot
Block, the inserted block center or so perforation is provided with so that the inserting column passes through and slides the straight slot of mating connection, the straight slot
The center of upper and lower two side is correspondingly arranged on the second conductive part to be compressed with described first to electric end, on the inserted block right side
The outer shroud of the straight slot is provided with the annular groove to be connected with second the ring disk, inserting column left distal end is corresponding up and down
It is provided with the first inclined socket surface, inserted block top end surface or so and is correspondingly arranged on the second inclined socket surface, left and right is correspondingly arranged on before pedestal
Side protective plate, pedestal forward top are fixedly installed protective plate, and upper protective plate is connected with side protective plate, the rotation of pedestal bottom
Shaft is connected with, shaft bottom is provided with fixed station, steer motor, shaft and steer motor are embedded in fixed station
Power is connected, and fixed station bottom is provided with buckles for clamping lock of the clamping lock on road stent, is provided in installing matrix disconnected
Electric installation.
2. improved road speed measuring device according to claim 1, it is characterised in that：The perpendicular push plate upper end is provided with
Spiral shell shape hole, the spiral shell shape hole are connected with the spiral shell shape bar whorl, and the spiral shell shape bar left end is left with second slide slot
The rotatable mating connection of side wall.
3. improved road speed measuring device according to claim 1, it is characterised in that：The lower end of the slot is provided with
One oblique surface, the side slot right end are provided with the second oblique surface, and the straight slot right end is provided with third oblique surface, the annular groove
Right end be provided with the 4th oblique surface.
4. improved road speed measuring device according to claim 1, it is characterised in that：The first the ring disk right side with it is described
The perpendicular push plate left side mutually compresses.
5. improved road speed measuring device according to claim 1, it is characterised in that：It is described electrically to connect to electricity Duan Yu cities
It connects, first conductive part is electrically connected with described first to electric end, and second conductive part is electrically connected with the tachymeter.
6. improved road speed measuring device according to claim 1, it is characterised in that：The breaker device includes fixation and sets
The chamber of installing in the installing matrix inner wall is put, described install sets having air switch in chamber, the circuit breaker left side
It is fixedly installed door body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711107315.6A CN108230693A (en) | 2017-11-10 | 2017-11-10 | A kind of improved road speed measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711107315.6A CN108230693A (en) | 2017-11-10 | 2017-11-10 | A kind of improved road speed measuring device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108230693A true CN108230693A (en) | 2018-06-29 |
Family
ID=62655069
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711107315.6A Withdrawn CN108230693A (en) | 2017-11-10 | 2017-11-10 | A kind of improved road speed measuring device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108230693A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112594526A (en) * | 2020-11-12 | 2021-04-02 | 江苏集萃深度感知技术研究所有限公司 | Vehicle speed measuring device |
-
2017
- 2017-11-10 CN CN201711107315.6A patent/CN108230693A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112594526A (en) * | 2020-11-12 | 2021-04-02 | 江苏集萃深度感知技术研究所有限公司 | Vehicle speed measuring device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106347093B (en) | Battery case locking device and battery case including the battery case locking device | |
| CN106274434B (en) | Battery case locking device and battery case including the battery case locking device | |
| CN106785722A (en) | A kind of bridge monitoring equipment | |
| CN106437323A (en) | Intelligent bicycle lock and bicycle | |
| CN108230693A (en) | A kind of improved road speed measuring device | |
| CN106791333B (en) | A kind of monitoring camera head apparatus | |
| CN107842830A (en) | The assembling structure of lamp socket and bulb | |
| CN107143731A (en) | A kind of monitoring device of bridge | |
| CN107833470A (en) | A kind of road speed measuring device | |
| CN205172216U (en) | Mistake tool to lock is prevented in high security | |
| CN108230694A (en) | A kind of traffic route speed measuring device | |
| CN108226558A (en) | A kind of new road speed measuring device | |
| CN107184063A (en) | A kind of portable type letter box arrangement | |
| CN107781724A (en) | A kind of Novel LED lamp | |
| CN107856566A (en) | A kind of New-energy electric vehicle charging device | |
| CN108223987A (en) | A kind of road vehicles tachymeter | |
| CN107453164A (en) | A kind of hair-dryer device of stabilization | |
| CN107839536A (en) | A kind of new-energy automobile device | |
| CN216788350U (en) | Anti-theft device for petroleum well | |
| CN108230697A (en) | A kind of Vehicle Speed speed measuring device | |
| CN108226557A (en) | A kind of automobile velocimeter | |
| CN107781737A (en) | A kind of LED lamp | |
| CN108050432A (en) | A kind of easily detachable LED lamp | |
| CN216079595U (en) | Emergency lighting device for coal mining | |
| CN215331939U (en) | Foundation ditch protector for highway engineering |
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 |
Application publication date: 20180629 |
|
| WW01 | Invention patent application withdrawn after publication |