CN107457835A - A kind of automatically controlled protection bench saw and its control method based on capacitance touch principle - Google Patents
A kind of automatically controlled protection bench saw and its control method based on capacitance touch principle Download PDFInfo
- Publication number
- CN107457835A CN107457835A CN201710818547.6A CN201710818547A CN107457835A CN 107457835 A CN107457835 A CN 107457835A CN 201710818547 A CN201710818547 A CN 201710818547A CN 107457835 A CN107457835 A CN 107457835A
- Authority
- CN
- China
- Prior art keywords
- bench saw
- capacitance touch
- automatically controlled
- motor
- chip
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27B—SAWS FOR WOOD OR SIMILAR MATERIAL; COMPONENTS OR ACCESSORIES THEREFOR
- B27B5/00—Sawing machines working with circular or cylindrical saw blades; Components or equipment therefor
- B27B5/16—Saw benches
- B27B5/22—Saw benches with non-feedable circular saw blade
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27B—SAWS FOR WOOD OR SIMILAR MATERIAL; COMPONENTS OR ACCESSORIES THEREFOR
- B27B5/00—Sawing machines working with circular or cylindrical saw blades; Components or equipment therefor
- B27B5/29—Details; Component parts; Accessories
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H5/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection
- H02H5/12—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection responsive to undesired approach to, or touching of, live parts by living beings
Abstract
The invention discloses a kind of automatically controlled protection bench saw and its control method based on capacitance touch principle, including capacitive touch circuit, STM32 single-chip microcomputers, double relay, pedestal, bearing, pedestal bottom plate, locking nut, six prism supports, synchronous big belt wheel, synchronous small pulley, bench saw piece, hexagon socket cap head screw, main shaft, plus screw, switch, slider nut, motor, L-type guide plate, belt, bearing block, work top, longitudinal baffle support, slip notch, kerf mouth.The introducing of the capacitive touch circuit, STM32 single-chip microcomputers and double relay, during so that bench saw accident occurring, elder generation does not power off at once but reverse power supply first very short to electric saw, then power off again, so both having eliminated the bench saw piece rotated at a high speed, inertia in turn, ensures that the stable stopping of bench saw to injury is added caused by operator after a loss of power.A kind of automatically controlled protection bench saw based on capacitance touch principle is safe, easy to use, long lifespan, can be widely used in carpenter's industry.
Description
Technical field
The invention belongs to the technical field of bench saw protection, and in particular to a kind of automatically controlled protecting stand based on capacitance touch principle
Saw and its control method.
Background technology
Bench saw is the center of most of carpentry yards, is the indispensable implement of woodworking.But if improper use, platform
Saw will be breakneck.In woodworking production operation, the outer injury of generation is of common occurrence, and wherein finger is that head works as it
Punching.Every carpenter master worker, its finger is nearly all more or less by injury, or even some are directly just cut off.It may be said that
Bench saw brings great convenience to our carpenter's industry production, but also brings unfortunate injury simultaneously.In order to by unfortunate wound
Evil is reduced to minimum, also allows finger to escape injury, development and production go out a intelligent protection bench saw, and tool is of great significance.
The existing a kind of mechanical protection bench saw in market can also accomplish the protection to human body, but it is to use brake
Method realize bench saw stalling, design, the manufacturing and processing of mechanical protection bench saw mechanical braking system make bench saw mechanical braking
Impact afterwards to bench saw piece is larger, causes bench saw pad wear or damage.Changing table saw blade is both needed to after braking impact every time, is caused
The waste of production and the raising of use cost.The regular hour is also required to so as to reduce life simultaneously for each changing table saw blade
Produce efficiency.
The content of the invention
It is contemplated that at least solves technical problem present in prior art.Therefore, the present invention provides one kind based on electricity
Hold the automatically controlled protection bench saw and its control method for touching principle, it is therefore an objective to improve the security protection performance of bench saw.
To achieve these goals, the technical scheme taken of the present invention is：It is a kind of automatically controlled anti-based on capacitance touch principle
Protect bench saw, it is characterised in that：A kind of described automatically controlled protection bench saw based on capacitance touch principle include capacitive touch circuit,
STM32 single-chip microcomputers, double relay and transmission device.
Described capacitive touch circuit includes the circuit board with capacitance touch chip；Described carries capacitance touch chip
Circuit board and bearing block enter row conductor electric connection；The described circuit board and STM32 single-chip microcomputers with capacitance touch chip
Enter row conductor electric connection, and STM32 single-chip microcomputers are arranged close to the tabula of motor with the circuit board with capacitance touch chip
Plate side；Described STM32 single-chip microcomputers enter row conductor electric connection with double relay, and double relay is also mounted at close to motor
Pedestal bottom plate on；Described double relay and the jack of power supply adaptor enter row conductor electric connection；Described motor is with opening
Close, the jack of power supply adaptor enters that row conductor is electrical to be connected in parallel；The jack of described power supply adaptor is carried out with adapter
Connection, is powered to the automatically controlled protection bench saw of capacitive touch circuit.
Described transmission device includes motor；Described motor is connected with synchronous small pulley by lock-screw；Described
Motor is fixedly connected with pedestal bottom plate, and close to motor one end of longitudinal baffle support be provided with two screwed holes and with longitudinal baffle branch
Frame carries out mode connects for screw；Described longitudinal baffle support is provided with two screwed holes and a circular port；Described synchronous small pulley with it is same
Step big belt wheel is attached with belt；One end of described belt is attached with synchronous small pulley, and the other end of belt with
Synchronous big belt wheel is attached；Described synchronous big belt wheel is connected with main shaft one end by lock-screw；Described main shaft is another
End is attached with bench saw piece and locked with locking nut；Described bench saw piece part spills kerf mouth；Described kerf mouth with
Two parallel slip notches are vertical on work top；Described slip notch carries out plus screw with L-type guide plate and is connected, with ten
The locking mechanism of word mode connects for screw is slider nut.Described bearing coordinates installation to be transported for supports main shaft stabilization with bearing block
Turn；Six described prism supports are provided with tapped through hole；Described bearing block be provided with four tapped through holes and with four six prism branch
Frame tapped through hole is coaxial；Described hexagon socket cap head screw connects pedestal bottom plate, six prism supports and bearing block from top to bottom.
A kind of control method of the automatically controlled protection bench saw based on capacitance touch principle, it is characterised in that：Comprise the following steps：
Step A:Initially enter initialization, bench saw normal work；
Step B:Touch electric circuit inspection touching signal；
A), it is not detected by touching signal then bench saw normal work；
B), detect that touching signal then carries out step C；
Step C:Double relay reverse power supply, and postpone the very short time, double relay powers off afterwards, and bench saw stably stops
Turn；
Step D:If restarting bench saw, press the SR on single-chip microcomputer and may continue to work into step A.
The present invention profitable fruit be：
1st, the introducing of capacitive touch circuit, STM32 single-chip microcomputers, double relay of the invention so that when bench saw accident occurs,
Elder generation does not power off at once but reverse power supply first very short to electric saw, then powers off again, had so both eliminated the bench saw of rotation at a high speed
Inertia stops to adding injury caused by operator and in turn, ensure that bench saw is stable piece after a loss of power, capacitive touch circuit it is automatically controlled
Protect bench saw safe.
2nd, the design of the L-type guide plate, sliding block notch, slider nut makes timber can be good at regulation before processing to arrive
Need the position processed.
3rd, with existing bench saw mechanical braking caused by blade wear and damage caused by production waste and use into
This raising compares, and the present invention substantially increases production efficiency, reduces production cost, has saved material.One kind is based on electricity
Hold the automatically controlled protection bench saw for touching principle, low manufacture cost, manufacturing process is simple, can be widely used in carpenter's industry.
Brief description of the drawings
Fig. 1 is a kind of explosive view of the automatically controlled protection bench saw based on capacitance touch principle
Fig. 2 faces assembling schematic diagram for a kind of automatically controlled protection bench saw based on capacitance touch principle
Fig. 3 is a kind of backsight assembling schematic diagram of the automatically controlled protection bench saw based on capacitance touch principle
Fig. 4 is a kind of internal structure schematic diagram of the automatically controlled protection bench saw based on capacitance touch principle
Fig. 5 is that the positive of double relay module obtains electrical connection figure
Fig. 6 is that the reverse of double relay module obtains electrical connection figure
Fig. 7 is the power-off wiring diagram of double relay module
Fig. 8 is touching circuit diagram
Fig. 9 is a kind of sequential flowchart of the automatically controlled protection bench saw based on capacitance touch principle
In figure mark for：1st, L-type guide plate, 2, plus screw, 3, work top, 4, kerf mouth, 5, belt, 6, sliding groove
Mouthful, 7, synchronous big belt wheel, 8, longitudinal baffle support, 9, synchronous small pulley, 10, motor, 11, hexagon socket cap head screw, 12, double
Relay, 13, the circuit board with capacitance touch chip, 14, STM32F4072GT6 single-chip microcomputers, 15, pedestal, 16, pedestal bottom
Plate, 17, diaphragm plate, 18, the jack of power supply adaptor, 19, switch, 20, bench saw piece, 21, six prism supports, 22, bearing block,
23rd, slider nut, 24, main shaft, 25, bearing, 26, locking nut, 27, work top.
Embodiment
Below against accompanying drawing, by the description to embodiment, embodiment of the invention is made further details of
Explanation, it is therefore an objective to help those skilled in the art to have more complete, accurate and deep reason to design of the invention, technical scheme
Solution, and contribute to its implementation.
Capacitive touch circuit includes the circuit board 13 with capacitance touch chip as shown in Fig. 4 to Fig. 9；With capacitance touch
The circuit board 13 of chip enters row conductor electric connection with bearing block 22；Circuit board 13 with capacitance touch chip with
STM32F4072GT6 single-chip microcomputers 14 enter row conductor electric connection, and STM32F4072GT6 single-chip microcomputers 14 are with carrying capacitance touch core
The circuit board 13 of piece is arranged close to the side of diaphragm plate 17 of motor 10；STM32F4072GT6 single-chip microcomputers 14 and double relay 12
Enter row conductor electric connection, and double relay 12 is also mounted on the pedestal bottom plate 16 of motor 10；Double relay 12 and electricity
The jack 18 of source adapter enters row conductor electric connection；Motor 10 enters row conductor electricity with switch 19, the jack 18 of power supply adaptor
Property is connected in parallel；Jack 18 and the adapter of power supply adaptor are attached, to the automatically controlled protection bench saw of capacitive touch circuit
It is powered.
Transmission device includes motor 10 as shown in Figures 1 to 4；The motor 10 passes through lock-screw with synchronous small pulley 9
Connection；The motor 10 is fixedly connected with pedestal bottom plate 16, and is provided with two screw threads close to one end of motor 10 of longitudinal baffle support 8
Hole and with longitudinal baffle support 8 carry out mode connects for screw；Longitudinal baffle support 8 is provided with two screwed holes and a circular port；Synchronous small band
Wheel 9 is attached with synchronous big belt wheel 7 with belt 5；One end of belt 5 is attached with synchronous small pulley 9, and belt 5 is another
One end is attached with synchronous big belt wheel 7；Synchronous big belt wheel 7 is connected with the one end of main shaft 24 by lock-screw；Main shaft 24 is another
End is attached with bench saw piece 20 and locked with locking nut 26；The part of bench saw piece 20 spills kerf mouth 4；Kerf mouth 4 and work
Two parallel slip notches 6 are vertical on table top 27；Slide notch 6 to be connected with the progress plus screw 2 of L-type guide plate 1, with cross spiral shell
The locking mechanism of the connection of nail 2 is slider nut 23.Bearing 25 coordinates installation to be used for the steady running of supports main shaft 24 with bearing block 22；
Six prism supports 21 are provided with tapped through hole；Bearing block 22 be provided with four tapped through holes and with four tapped through holes of six prism support 21
Coaxially；Hexagon socket cap head screw 11 connects pedestal bottom plate 16, six prism supports 21 and bearing block 22 from top to bottom.Capacitance touch
Capacitance touch chip used in circuit, original state are low level, when touching, it may occur that the saltus step of a level；
STM32F4072GT6 single-chip microcomputers 14 are captured after the change of level through the control chip of double relay 12, produce two ways of digital signals,
So as to control the closure of double relay 12 and closing.Continue to make bench saw work, answering for STM32F4072GT6 single-chip microcomputers 14 need to be pressed
Position button, STM32F4072GT6 single-chip microcomputers 14 are resetted, and motor 10 is powered again, and motor 10 rotates, and bench saw works on.
A kind of control method of the automatically controlled protection bench saw based on capacitance touch principle, it is characterised in that：Comprise the following steps：
Step A:Initially enter initialization, bench saw normal work；
Step B:Touch electric circuit inspection touching signal；
A), it is not detected by touching signal then bench saw normal work；
B), detect that touching signal then carries out step C；
Step C:Double relay reverse power supply, and postpone the very short time, double relay powers off afterwards, and bench saw stably stops
Turn；
Step D:If restarting bench saw, the SR pressed on single-chip microcomputer enters step A.
A kind of automatically controlled protection bench saw operation principle based on capacitance touch principle is as follows：
1) plus screw 2 on work top 27, is turned first to loosen the slider nut 23 of the lower section of work top 27, is made
L-type guide plate 1 on work top 27 along slide notch 6 move back and forth adjust between L-type guide plate 1 and bench saw piece 20 away from
From making L-type guide plate 1 reach the correct position for wanting timber to process, reversely turning plus screw 2 afterwards makes L-type guide plate 1 solid
It is fixed.
2) switch 19, is pressed, starts motor 10, drives synchronous small pulley 9, belt 5, synchronous big belt wheel 7, main shaft 24 successively
Rotated with bench saw piece 20, when bench saw normal work is that human body is not touched with bench saw piece 20, electrically connected with the wire of bearing block 22
The capacitance touch chip of the circuit board 13 with capacitance touch chip connect is not detected by the change of electricity, and bench saw is in normal work
Make state.
3), its timber is processed, when the finger of people touches bench saw piece 20, because human body is one very big
Electric capacity and conductor, electricity can be caused quickly to reduce, the capacitance touch chip for the circuit board 13 being electrically connected with the wire of bearing block 22
Quickly detect, the STM32F4072GT6 single-chip microcomputers 14 being electrically connected with the wire of circuit board 13 with capacitance touch chip are fast
The unlatching of speed control double relay 12 and closure, are quickly rotated backward to motor 10 and power off stopping, and then make bench saw piece
20 can fast and stable stalling.
4), to continue to make bench saw work, the SR of STM32F4072GT6 single-chip microcomputers 14 need to be pressed,
STM32F4072GT6 single-chip microcomputers 14 are resetted, and motor 10 is powered again, and motor 10 rotates, and bench saw works on.
The basic principles, principal features and advantages of the present invention have been shown and described above.The technical staff of the industry should
Understand, the present invention is not limited to the above embodiments, the original for simply illustrating the present invention described in above-described embodiment and specification
Reason, without departing from the spirit and scope of the present invention, various changes and modifications of the present invention are possible, these changes and improvements
It all fall within the protetion scope of the claimed invention.The claimed scope of the invention is by appended claims and its equivalent circle
It is fixed.
Claims (2)
- A kind of 1. automatically controlled protection bench saw based on capacitance touch principle, it is characterised in that：It is former that described one kind is based on capacitance touch The automatically controlled protection bench saw of reason includes capacitive touch circuit, STM32 single-chip microcomputers, double relay and transmission device.Described capacitive touch circuit includes the circuit board with capacitance touch chip；The described electricity with capacitance touch chip Road plate enters row conductor electric connection with bearing block；The described circuit board with capacitance touch chip is carried out with STM32 single-chip microcomputers Wire is electrically connected with, and STM32 single-chip microcomputers are arranged close to the diaphragm plate one of motor with the circuit board with capacitance touch chip Side；Described STM32 single-chip microcomputers enter row conductor electric connection with double relay, and double relay is also mounted at the base close to motor On seat bottom plate；Described double relay and the jack of power supply adaptor enter row conductor electric connection；Described motor and switch, electricity The jack of source adapter enters that row conductor is electrical to be connected in parallel；The jack of described power supply adaptor is attached with adapter, The automatically controlled protection bench saw of capacitive touch circuit is powered.Described transmission device includes motor；Described motor is connected with synchronous small pulley by lock-screw；Described motor It is fixedly connected with pedestal bottom plate, and is provided with two screwed holes close to motor one end of longitudinal baffle support and enters with longitudinal baffle support Row mode connects for screw；Described longitudinal baffle support is provided with two screwed holes and a circular port；Described synchronous small pulley with it is synchronous big Belt wheel is attached with belt；One end of described belt is attached with synchronous small pulley, and the other end of belt with it is synchronous Big belt wheel is attached；Described synchronous big belt wheel is connected with main shaft one end by lock-screw；The described main shaft other end with Bench saw piece is attached and locked with locking nut；Described bench saw piece part spills kerf mouth；Described kerf mouth and work Two parallel slip notches are vertical on table top；Described slip notch carries out plus screw with L-type guide plate and is connected, with cross spiral shell The locking mechanism of nail connection is slider nut.Described bearing coordinates installation to be used for supports main shaft steady running with bearing block；Institute The six prism supports stated are provided with tapped through hole；Described bearing block be provided with four tapped through holes and with four six prism support screw threads Through hole is coaxial；Described hexagon socket cap head screw connects pedestal bottom plate, six prism supports and bearing block from top to bottom.
- 2. a kind of control method of automatically controlled protection bench saw based on capacitance touch principle according to claim 1, its feature It is：Comprise the following steps：Step A:Initially enter initialization, bench saw normal work；Step B:Touch electric circuit inspection touching signal；A), it is not detected by touching signal then bench saw normal work；B), detect that touching signal then carries out step C；Step C:Double relay reverse power supply, and postpone the very short time, double relay is powered off afterwards, and bench saw is stable to be stalled；Step D:If restarting bench saw, the SR pressed on single-chip microcomputer enters step A.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710818547.6A CN107457835A (en) | 2017-09-12 | 2017-09-12 | A kind of automatically controlled protection bench saw and its control method based on capacitance touch principle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710818547.6A CN107457835A (en) | 2017-09-12 | 2017-09-12 | A kind of automatically controlled protection bench saw and its control method based on capacitance touch principle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107457835A true CN107457835A (en) | 2017-12-12 |
Family
ID=60552322
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710818547.6A Pending CN107457835A (en) | 2017-09-12 | 2017-09-12 | A kind of automatically controlled protection bench saw and its control method based on capacitance touch principle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107457835A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109664384A (en) * | 2019-02-01 | 2019-04-23 | 安徽理工大学 | A kind of safe bench saw |
| CN111993495A (en) * | 2020-08-30 | 2020-11-27 | 朱丛江 | Safe sawing machine with dual protection effect |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1425378A (en) * | 1972-06-03 | 1976-02-18 | Riedl Ohg Adolf | Protective circuit arrangement for band cutter machines |
| US4432139A (en) * | 1980-10-28 | 1984-02-21 | Andreas Stihl | Safety device on a power saw |
| US20080041207A1 (en) * | 2006-07-14 | 2008-02-21 | Aurora Office Equipment Co., Ltd. | Touch-sensitive paper shredder control system |
| CN201218410Y (en) * | 2008-05-17 | 2009-04-08 | 林正荣 | Hand security protection apparatus of multifunctional punch |
| US8336432B1 (en) * | 2011-08-19 | 2012-12-25 | David J Butler | Safety system for machine tools |
| CN203831532U (en) * | 2014-05-15 | 2014-09-17 | 杨家友 | Bench saw safety device |
| CN203994082U (en) * | 2014-06-03 | 2014-12-10 | 中国建筑土木建设有限公司 | Woodworking table saw |
| CN207310104U (en) * | 2017-09-12 | 2018-05-04 | 安徽理工大学 | A kind of automatically controlled protection bench saw based on capacitance touch principle |
-
2017
- 2017-09-12 CN CN201710818547.6A patent/CN107457835A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1425378A (en) * | 1972-06-03 | 1976-02-18 | Riedl Ohg Adolf | Protective circuit arrangement for band cutter machines |
| US4432139A (en) * | 1980-10-28 | 1984-02-21 | Andreas Stihl | Safety device on a power saw |
| US20080041207A1 (en) * | 2006-07-14 | 2008-02-21 | Aurora Office Equipment Co., Ltd. | Touch-sensitive paper shredder control system |
| CN201218410Y (en) * | 2008-05-17 | 2009-04-08 | 林正荣 | Hand security protection apparatus of multifunctional punch |
| US8336432B1 (en) * | 2011-08-19 | 2012-12-25 | David J Butler | Safety system for machine tools |
| CN203831532U (en) * | 2014-05-15 | 2014-09-17 | 杨家友 | Bench saw safety device |
| CN203994082U (en) * | 2014-06-03 | 2014-12-10 | 中国建筑土木建设有限公司 | Woodworking table saw |
| CN207310104U (en) * | 2017-09-12 | 2018-05-04 | 安徽理工大学 | A kind of automatically controlled protection bench saw based on capacitance touch principle |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109664384A (en) * | 2019-02-01 | 2019-04-23 | 安徽理工大学 | A kind of safe bench saw |
| CN111993495A (en) * | 2020-08-30 | 2020-11-27 | 朱丛江 | Safe sawing machine with dual protection effect |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104097188B (en) | The interlocking system of dust arrester | |
| CN107457835A (en) | A kind of automatically controlled protection bench saw and its control method based on capacitance touch principle | |
| CN106141328A (en) | Automatic tapping machine | |
| CN207310104U (en) | A kind of automatically controlled protection bench saw based on capacitance touch principle | |
| EP3872978A1 (en) | Chainsaw, electric tool, and method for controlling electric tool | |
| CN103801742B (en) | Automatically milling cast gate machine | |
| CN207535723U (en) | The arrangements for speed regulation of electric vehicle | |
| CN202862060U (en) | Detection clamping device for hydraulic station | |
| CN104242783B (en) | A kind of stone material cutting motor method for controlling frequency conversion and device | |
| WO2017008531A1 (en) | Reverse rotation control system of electric tool and control method for same | |
| CN205960718U (en) | Battery protection circuit | |
| CN105227031B (en) | A kind of servomotor controller | |
| CN207556503U (en) | The detection device of special-shaped parts | |
| CN208811130U (en) | A kind of novel protected porous bench drill of lid | |
| CN207992408U (en) | A kind of battery inspection device | |
| CN206305486U (en) | Turbocharger casing positioning and clamping device | |
| CN206164374U (en) | Use special converter at spark -erosion wire cutting machine bed | |
| CN201639272U (en) | Power protection device of motor controller | |
| CN212919736U (en) | Sawing processing device | |
| CN112305953A (en) | Shutdown pre-speed regulation circuit of dust collector and control method thereof | |
| CN111245312A (en) | Electric tool and control method of electric tool | |
| CN206543850U (en) | A kind of stitch cutter | |
| CN209520732U (en) | A kind of electronic emery wheel cuts saw device in building construction scene | |
| CN204270317U (en) | A kind of fingerprint personal identification system | |
| CN218309457U (en) | Integrated circuit packaging test device |
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 | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20171212 |