CN112423173A - Sound control is increase of service life's self preservation protects auxiliary assembly for components and parts - Google Patents
Sound control is increase of service life's self preservation protects auxiliary assembly for components and parts Download PDFInfo
- Publication number
- CN112423173A CN112423173A CN202011223733.3A CN202011223733A CN112423173A CN 112423173 A CN112423173 A CN 112423173A CN 202011223733 A CN202011223733 A CN 202011223733A CN 112423173 A CN112423173 A CN 112423173A
- Authority
- CN
- China
- Prior art keywords
- seat
- movably connected
- fastening
- rod
- service life
- 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- Withdrawn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
- 238000004321 preservation Methods 0.000 title claims description 3
- 230000005540 biological transmission Effects 0.000 claims abstract description 25
- 230000001681 protective effect Effects 0.000 claims abstract description 18
- 239000000872 buffer Substances 0.000 claims abstract description 12
- 230000005389 magnetism Effects 0.000 claims description 11
- 230000007246 mechanism Effects 0.000 claims description 3
- 239000007769 metal material Substances 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 19
- 230000008569 process Effects 0.000 abstract description 15
- 230000000694 effects Effects 0.000 abstract description 7
- 230000006835 compression Effects 0.000 abstract description 4
- 238000007906 compression Methods 0.000 abstract description 4
- BGPVFRJUHWVFKM-UHFFFAOYSA-N N1=C2C=CC=CC2=[N+]([O-])C1(CC1)CCC21N=C1C=CC=CC1=[N+]2[O-] Chemical compound N1=C2C=CC=CC2=[N+]([O-])C1(CC1)CCC21N=C1C=CC=CC1=[N+]2[O-] BGPVFRJUHWVFKM-UHFFFAOYSA-N 0.000 description 8
- 230000002159 abnormal effect Effects 0.000 description 5
- 230000009471 action Effects 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 239000007853 buffer solution Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000005856 abnormality Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/02—Casings; Cabinets ; Supports therefor; Mountings therein
- H04R1/04—Structural association of microphone with electric circuitry therefor
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
- G08B21/18—Status alarms
- G08B21/24—Reminder alarms, e.g. anti-loss alarms
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
- H04R1/22—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only
- H04R1/28—Transducer mountings or enclosures modified by provision of mechanical or acoustic impedances, e.g. resonator, damping means
- H04R1/2869—Reduction of undesired resonances, i.e. standing waves within enclosure, or of undesired vibrations, i.e. of the enclosure itself
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R3/00—Circuits for transducers, loudspeakers or microphones
- H04R3/007—Protection circuits for transducers
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- General Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Otolaryngology (AREA)
- Emergency Alarm Devices (AREA)
Abstract
The invention relates to the technical field of sound equipment service life protection, and discloses a self-protection auxiliary device for prolonging service life of a sound equipment control component, which comprises a mounting seat, the outer part of the mounting seat is movably connected with a fastening seat, the top of the fastening seat is movably connected with a buffer seat, the top of the buffer seat is movably connected with a transmission rod, the transmission rod is movably connected with a leakage circuit inside, the top of the transmission rod is movably connected with a protective magnet, the top of the protective magnet is movably connected with a connecting seat, the mounting seat is driven to move by the sound vibration during working, so that the mounting seat generates a thrust force to the fastening seat, the thrust force is transmitted to the buffer seat through the fastening seat, and finally the compression spring is compressed to deform and then is transmitted into the fastening seat, and then transmit to the mount pad in to increase the clamping force to components and parts, thereby reached and increased the effect to the clamping force of components and parts in order to prolong its life automatically in stereo set working process.
Description
Technical Field
The invention relates to the technical field of sound equipment service life protection, in particular to a self-protection auxiliary device for prolonging service life of a sound equipment control component.
Background
With the development of social economy, the living standard of people is increasing day by day, so the pursuit of quality of life is also increasing synchronously, which leads to people's love for music to increase in recent years, but the propagation of music is less at present, and a great variety of sound boxes are not available, and the sound boxes control current through components and further control vibration frequency to generate sound.
The stereo set must produce vibrations at the in-process that uses, and especially some large-scale stereo set equipment, the vibrations of its production are often great, and permanent vibrations can influence the life of the inside components and parts of stereo set, lead to the frequency of people's change to rise to make the operation cost of enterprise improve, the condition of electric leakage easily takes place for the long-term stereo set of use simultaneously, and traditional stereo set does not have effectual earth leakage protection device.
In view of the above, research and improvement are made on the existing structure and defects, and a self-protection auxiliary device for an acoustic control component is provided to prolong the service life of the acoustic control component, so as to achieve the purpose of higher practical value.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides a self-protection auxiliary device for controlling components and parts of a sound system, which prolongs the service life of the components and parts and has the advantages of automatically increasing the clamping force on the components and parts in the working process of the sound system so as to prolong the service life of the components and parts, automatically switching off the circuit for protection when abnormal electric leakage occurs in a sound system circuit and giving an alarm, and solves the problems that the components and parts are synchronously driven to vibrate when the traditional sound system is used so as to reduce the service life of the components and parts, and no effective protection.
(II) technical scheme
In order to realize the purposes of automatically increasing the clamping force on components in the working process of the sound equipment to prolong the service life of the components, automatically performing circuit breaking protection and alarming when abnormal electric leakage occurs in a sound equipment circuit, the invention provides the following technical scheme: a self-protection auxiliary device for prolonging the service life of a sound control component comprises a mounting seat, wherein the outer part of the mounting seat is movably connected with a fastening seat, the top of the fastening seat is movably connected with a buffer seat, the top of the buffer seat is movably connected with a transmission rod, the inner part of the transmission rod is movably connected with a leakage circuit, the top of the transmission rod is movably connected with a protection magnet, the top of the protection magnet is movably connected with a connecting seat, the top of the connecting seat is movably connected with a reset spring, the top of the reset spring is movably connected with an energizing coil, the left side of the transmission rod is movably connected with a push rod, the top of the push rod is movably intercepted with a fastening rod, the top of the fastening rod is movably connected with a fastening spring, the bottom of the fastening rod is movably connected with a pressure rod, the protection magnet is characterized in that the left side of the protection magnet is movably connected with a pull rod, the top of the pull rod is movably connected with a sliding block, the left side and the right side of the sliding block are both movably connected with an electrified contact, the right side of the electrified contact is movably connected with a circuit contact, and the left side of the electrified contact is movably connected with an alarm contact.
Preferably, the magnetism generated after the energizing coil is energized is opposite to the magnetism at the top of the protective magnet.
Preferably, the fastening seat and the energized coil form a closed loop through the transmission rod, and the fastening seat is made of a conductive metal material.
Preferably, the central axis of the pressure rod is collinear with the central axes of the fastening spring and the fastening rod.
Preferably, the line contact is connected with an external power supply through a line, and the alarm contact is connected with an external alarm mechanism through a line.
Preferably, the number of the fastening seats is four, and the fastening seats are distributed outside the mounting seat in an array shape.
(III) advantageous effects
Compared with the prior art, the invention provides a self-protection auxiliary device for prolonging the service life of a sound control component, which has the following beneficial effects:
1. the self-protection auxiliary equipment for prolonging the service life of the sound control component is characterized in that the sound control component is installed in the installation seat, in the working process of the sound, sound is transmitted in a vibration mode, so that the vibration of the component is inevitably caused, at the moment, the vibration drives the installation seat to move, so that the installation seat generates thrust on the fastening seat, the thrust is transmitted to the buffer seat through the fastening seat, and is sequentially transmitted to the transmission rod and the connection seat through the buffer seat, and is finally transmitted into the reset spring, at the moment, the reset spring deforms after receiving the thrust to drive the transmission rod to move upwards, the transmission rod simultaneously drives the push rod to move in the moving process, the push rod applies downward thrust to the fastening rod in the moving process, the thrust is transmitted into the fastening spring through the fastening rod, and the fastening spring is finally stretched to deform so as to drive the fastening rod to move downwards, the fastening rod moves and drives the motion of pressurization pole to apply and give the decurrent thrust of pressurization seat, this thrust transmits to compression spring through the pressurization seat, and final compression spring makes it take place to transmit to the fastening seat in after deformation, and then transmits to the mount pad in, thereby increaseing the centre gripping dynamics to components and parts, shake thereupon and reduce life in order to prevent it at the working process of stereo set, thereby reached and increased the effect of centre gripping dynamics to components and parts in order to prolong its life automatically in stereo set working process.
2. The sound control component uses self-protection auxiliary equipment with prolonged service life, and current flows into the electrified coil through the leakage circuit, so that the electrified coil is electrified to generate magnetism, and the magnetism of the electrified coil after being electrified is opposite to the magnetism of the top of the protective magnet, so that the protective magnet can receive attraction force from the electrified coil at the moment, thereby compressing the reset spring to deform and further drive the protective magnet to move upwards, the protective magnet moves and further drives the pull rod to move, the pull rod can apply a horizontal thrust to the sliding block, thereby pushing the sliding block to slide, the sliding block can drive the electrified contact to slide, so that the electrified contact is separated from the circuit contact and is contacted with the alarm contact, the main circuit of the sound is disconnected with the alarm circuit and is connected, and the staff is reminded of the abnormal circuit, therefore, the effects of automatic circuit breaking protection and alarming when abnormal electric leakage occurs in the sound circuit are achieved.
Drawings
FIG. 1 is a schematic view of a mounting base according to the present invention;
FIG. 2 is a schematic view of a pressing bar according to the present invention;
FIG. 3 is a schematic view of the structure of the transmission rod of the present invention;
FIG. 4 is a schematic view of a fastening seat according to the present invention;
FIG. 5 is a schematic view of the slider structure of the present invention.
In the figure: 1. a mounting seat; 2. a buffer seat; 3. a transmission rod; 4. a leakage line; 5. a protective magnet; 6. a connecting seat; 7. a return spring; 8. an electrified coil; 9. a push rod; 10. a fastening spring; 11. a fastening rod; 12. a pressurizing rod; 13. a pressurizing seat; 14. a pressurizing spring; 15. a fastening seat; 16. a pull rod; 17. a slider; 18. a power-on contact; 19. a line contact; 20. and an alarm contact.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-5, a self-protection auxiliary device for prolonging the service life of a sound control component comprises a mounting base 1, wherein the outside of the mounting base 1 is movably connected with four fastening bases 15, the four fastening bases 15 are distributed outside the mounting base 1 in an array shape, the top of each fastening base 15 is movably connected with a buffer base 2, the top of each buffer base 2 is movably connected with a transmission rod 3, the inside of each transmission rod 3 is movably connected with a leakage circuit 4, the top of each transmission rod 3 is movably connected with a protective magnet 5, the top of each protective magnet 5 is movably connected with a connecting base 6, the top of each connecting base 6 is movably connected with a return spring 7, the top of each return spring 7 is movably connected with an electrified coil 8, the fastening bases 15 and the electrified coils 8 form a closed loop through the transmission rods 3, the fastening bases 15 are made of conductive metal materials, and the magnetism generated after the electrified coils 8 is opposite to the, the left side swing joint of transfer line 3 has push rod 9, the activity of push rod 9 top has intercepted fastening rod 11, fastening rod 11 top swing joint has fastening spring 10, fastening rod 11 bottom swing joint has pressure rod 12, the central axis and fastening spring 10 of pressure rod 12, the central axis of fastening rod 11 are the collinear, pressure rod 12 bottom swing joint has pressure seat 13, pressure seat 13 bottom swing joint has pressure spring 14, protection magnet 5 left side swing joint has pull rod 16, pull rod 16 top swing joint has sliding block 17, the equal swing joint in both sides has circular telegram contact 18 about sliding block 17, circular telegram contact 18 right side swing joint has circuit contact 19, circular telegram contact 18 left side swing joint has alarm contact 20, circuit contact 19 passes through line connection with external power source, alarm contact 20 passes through line connection with external alarm mechanism.
The working principle is as follows: the self-protection auxiliary equipment for prolonging the service life of the sound control component is characterized in that the sound control component is arranged in the mounting seat 1 when the self-protection auxiliary equipment is used, sound is transmitted in a vibration mode in the working process of the sound, so that the vibration can inevitably cause the vibration of the component, the vibration drives the mounting seat 1 to move, the mounting seat 1 generates a thrust force on the fastening seat 15, the thrust force is transmitted to the buffer seat 2 through the fastening seat 15 and is sequentially transmitted to the transmission rod 3 and the connecting seat 6 through the buffer seat 2 and finally transmitted into the return spring 7, the return spring 7 deforms after receiving the thrust force so as to drive the transmission rod 3 to move upwards, the push rod 9 is driven to move at the same time in the moving process of the transmission rod 3, the downward thrust force is applied to the fastening rod 11 in the moving process of the push rod 9, and the thrust force is transmitted into the fastening spring 10 through the fastening rod 11, and finally tensile fastening spring 10 makes it take place to deform thereby drive fastening rod 11 downstream, fastening rod 11 moves and drives pressurization pole 12 motion, thereby apply for 13 a decurrent thrust of pressurization seat, this thrust transmits to pressurization spring 14 through pressurization seat 13, and final compression pressurization spring 14 makes it take place to transmit to fastening seat 15 in after deformation, and then transmit to mount pad 1 in, thereby increase the centre gripping dynamics to components and parts, prevent that it from vibrations thereupon reduce life in the course of the work of stereo set, thereby reached and increased the effect to the centre gripping dynamics of components and parts in order to prolong its life automatically in the stereo set working process.
If the component leaks electricity, current flows into the electrified coil 8 through the leakage line 4, so that the electrified coil 8 is electrified to generate magnetism, and the magnetism of the electrified coil 8 after being electrified is opposite to the magnetism of the top of the protective magnet 5, so that the protective magnet 5 is attracted by the attraction force from the electrified coil 8 at the moment, the reset spring 7 is compressed to deform the protective magnet 5 so as to drive the protective magnet 5 to move upwards, the protective magnet 5 moves so as to drive the pull rod 16 to move, the pull rod 16 moves to apply a horizontal thrust to the sliding block 17, so that the sliding block 17 is pushed to slide, the sliding block 17 can drive the electrified contact 18 to slide, so that the electrified contact 18 is separated from the line contact 19 and is contacted with the alarm contact 20, and the main circuit of the sound is disconnected and connected with the alarm line, the circuit abnormality of the staff is reminded, and therefore the effects of automatic circuit breaking protection and alarming when the abnormal electric leakage occurs to the sound circuit are achieved.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. The utility model provides a stereo set is increase of service life's self preservation for control components and parts protects auxiliary assembly, includes mount pad (1), its characterized in that: the outer part of the mounting seat (1) is movably connected with a fastening seat (15), the top of the fastening seat (15) is movably connected with a buffer seat (2), the top of the buffer seat (2) is movably connected with a transmission rod (3), the inner part of the transmission rod (3) is movably connected with a leakage circuit (4), the top of the transmission rod (3) is movably connected with a protective magnet (5), the top of the protective magnet (5) is movably connected with a connecting seat (6), the top of the connecting seat (6) is movably connected with a reset spring (7), the top of the reset spring (7) is movably connected with an electrified coil (8), the left side of the transmission rod (3) is movably connected with a push rod (9), the top of the push rod (9) is movably intercepted with a fastening rod (11), the top of the fastening rod (11) is movably connected with a fastening spring (10), and the, pressurization pole (12) bottom swing joint has pressurization seat (13), pressurization seat (13) bottom swing joint has pressure spring (14), protection magnet (5) left side swing joint has pull rod (16), pull rod (16) top swing joint has sliding block (17), the equal swing joint in sliding block (17) left and right sides has circular telegram contact (18), circular telegram contact (18) right side swing joint has circuit contact (19), circular telegram contact (18) left side swing joint has alarm contact (20).
2. The self-protection auxiliary device for prolonging the service life of the sound control component as claimed in claim 1, wherein: the magnetism generated after the energizing coil (8) is energized is opposite to the magnetism at the top of the protective magnet (5).
3. The self-protection auxiliary device for prolonging the service life of the sound control component as claimed in claim 1, wherein: the fastening seat (15) and the energizing coil (8) form a closed loop through the transmission rod (3), and the fastening seat (15) is made of conductive metal materials.
4. The self-protection auxiliary device for prolonging the service life of the sound control component as claimed in claim 1, wherein: the central axis of the pressure rod (12) is in the same straight line with the central axes of the fastening spring (10) and the fastening rod (11).
5. The self-protection auxiliary device for prolonging the service life of the sound control component as claimed in claim 1, wherein: the circuit contact (19) is connected with an external power supply through a circuit, and the alarm contact (20) is connected with an external alarm mechanism through a circuit.
6. The self-protection auxiliary device for prolonging the service life of the sound control component as claimed in claim 1, wherein: the number of the fastening seats (15) is four, and the fastening seats are distributed outside the mounting seat (1) in an array shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011223733.3A CN112423173A (en) | 2020-11-05 | 2020-11-05 | Sound control is increase of service life's self preservation protects auxiliary assembly for components and parts |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011223733.3A CN112423173A (en) | 2020-11-05 | 2020-11-05 | Sound control is increase of service life's self preservation protects auxiliary assembly for components and parts |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112423173A true CN112423173A (en) | 2021-02-26 |
Family
ID=74827663
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011223733.3A Withdrawn CN112423173A (en) | 2020-11-05 | 2020-11-05 | Sound control is increase of service life's self preservation protects auxiliary assembly for components and parts |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112423173A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113079653A (en) * | 2021-03-25 | 2021-07-06 | 南京冠河马商贸有限公司 | Auxiliary device for preventing circuit board from being damaged by over-temperature for wave soldering of plastic component |
-
2020
- 2020-11-05 CN CN202011223733.3A patent/CN112423173A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113079653A (en) * | 2021-03-25 | 2021-07-06 | 南京冠河马商贸有限公司 | Auxiliary device for preventing circuit board from being damaged by over-temperature for wave soldering of plastic component |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN205244560U (en) | Electric machine cooling controllable valve that ventilates | |
| CN112423173A (en) | Sound control is increase of service life's self preservation protects auxiliary assembly for components and parts | |
| WO2017206267A1 (en) | Door frame assembly applied to microwave oven, and method and device for controlling door frame assembly | |
| US2410183A (en) | Electromagnetic device | |
| CN113054487A (en) | Auxiliary device for automatically fastening line for industrial automatic intelligent robot | |
| CN112530762A (en) | Auxiliary device for leakage self-power-off protection of components and parts for computer integrated circuit | |
| US2561481A (en) | Alarm for deaf persons | |
| CN110584360A (en) | Picture hanging device matched with blackboard | |
| CN207570712U (en) | A kind of brake electromagnetism force test device of elevator driving | |
| CN213304016U (en) | Adjustable electromagnetic relay | |
| CN109001912A (en) | Robot stereo colour display device and its control method | |
| CN104894761A (en) | Novel wire clamping device | |
| CN206449279U (en) | A kind of nozzle assembly based on nozzle flapper intelligent valve positioner IP modules | |
| CN206134525U (en) | But remote control's mechanical type wall switch | |
| CN203583162U (en) | Facial suture tension force control device for flat-head buttonhole sewing machine | |
| US8824117B2 (en) | Relay and method for controlling relay | |
| CN219162877U (en) | Novel electromagnetic lattice structure | |
| CN207382585U (en) | Sound proof box performance testing device | |
| CN201655663U (en) | Installation structure for tripping spring of vacuum contactor | |
| CN202013852U (en) | Intelligent AC contactor | |
| CN212907571U (en) | Relay armature limiting structure | |
| CN103094016A (en) | Hydraulic electromagnetic circuit breaker for preventing thunder | |
| CN214152801U (en) | Magnetic latching relay capable of automatically cutting off self-driven power supply | |
| CN219936951U (en) | Improved anti-adhesion double-control electromagnetic relay | |
| CN221146130U (en) | Multifunctional public safety video monitoring equipment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20210226 |