CN103531377A - Switch with power-off protection - Google Patents
Switch with power-off protection Download PDFInfo
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- CN103531377A CN103531377A CN201310544210.2A CN201310544210A CN103531377A CN 103531377 A CN103531377 A CN 103531377A CN 201310544210 A CN201310544210 A CN 201310544210A CN 103531377 A CN103531377 A CN 103531377A
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Abstract
The invention discloses a switch with power-off protection. The switch comprises a housing, a button assembly, at least a group of coil fixed contacts and coil moving contacts used for switching on a coil assembly, and at least a group of main fixed contacts and main moving contacts used for switching on a load circuit, wherein the coil moving contacts and the main moving contacts are fixedly arranged on a moving contact frame; the coil moving contacts are elastic elements; the distance between each coil moving contact and each coil fixed contact is shorter than that between each main moving contact and each main fixed contact; an armature is further fixed to the moving contact frame; one end, far away from a contact point of a contact assembly, of the armature is hinged to the coil assembly and the other end of the armature is driven by the button assembly to move up and down; an armature reset device for driving the armature to reset is arranged on the armature; a lock device used for locking the button assembly in the middle is arranged on the outer side of the housing. When power is cut off, the main moving contacts are separated from the main fixed contacts, and an electric tool cannot automatically work even if the button assembly is pressed and the power is on again, so that the operation safety is improved.
Description
Technical field
The present invention relates to motor switch field, particularly relate to a kind of switch with power-off protection.
Background technology
For the ease of the control operation to electric tools such as electric drill, electric hammer, electric grinders, its control switch is generally all arranged on the position of grip forefinger.Traditional Push switch is mainly by pressing button, and band action contact frame moves downward, and the moving contact that makes to be arranged on action contact frame contacts On current with the fixed contact being arranged on base, and then makes electric tool work.Because the vibration of most electric tools is in use more violent, at this moment the finger of control switch can not keep being pressed on all the time because of vibration the button place of switch, thus cause between moving contact and fixed contact contact unstable.In order to improve the stability of dynamic/static contact contact in switch, conventionally on electric power tool shell, be provided with cage knob, to guarantee that switch is all the time in on-state.Once but there is in use unexpected power outage; operating personnel often forget the locking of releasing cage knob to dynamic/static contact; while again sending a telegram here; electric tool is worked suddenly in the extemporal situation of staff's milli at the scene; this tends to cause device damage or personal injury accident occurs, and just need to develop a kind of switch with power-failure protecting function for this reason.
As Chinese patent literature CN101882523A discloses a kind of trigger of restarting defencive function with power failure, it is mainly comprised of base body, shell, trigger, cage knob, yoke, coil, magnetic core and armature; Wherein, base body, shell, trigger, cage knob and relevant structural detail form the mechanical structure part of switch, and yoke, coil, magnetic core and armature and relevant electromagnetic component form the electromagnetic structure part of switch.This switch when power-off, solenoid dead electricity, armature promotes lock hook and is no longer affiliated to cage knob, thereby makes trigger remove locking, makes the circuit of electric tool disconnect under the effect of back-moving spring, plays the effect of power-off protection.But; if switch is held in hand while having a power failure; or touch other object while placing; cause button all the time in pressured state; can not give up the throne to open position, now switch inside always in on-state, while again sending a telegram here; electric tool can be worked immediately, and the trigger that defencive function is restarted in therefore this band power failure still exists larger potential safety hazard in actual use.
At present, even if can solve button pressurized while having a power failure, the main solution that also can make the dynamic/static contact in switch disconnect is between tool side circuit and switch, to increase wiring board module, mode by electronics solves, but no matter electronic form is not all very desirable the aspect such as connecting aspect the reliability of breaking capacity, components and parts, cost, is badly in need of a kind of other mode and solves.
Summary of the invention
For this reason; the technical problem to be solved in the present invention is to prevent that electric tool from starting voluntarily after power-off; and then cause the problem of serious potential safety hazard; switch with power-off protection provided by the invention at its button of power-off protection position without giving up the throne; even button receives compressing during power-off; still can disconnect electric tool input circuit, play the effect of power-off protection.
For achieving the above object, the present invention is by the following technical solutions:
A switch with power-off protection, comprises housing; Button assembly, described button assembly is slidably mounted on described enclosure interior; Contact assembly, described contact assembly comprises at least one group of coil fixed contact for closing coil assembly, coil moving contact, and at least one group of main fixed contact, active contact that is used for connecting load circuit; Described coil fixed contact, described main fixed contact are fixedly installed on described enclosure interior, and described coil moving contact, described active contact are fixedly installed on action contact frame, and described coil moving contact is flexible member; Distance between described coil moving contact and described coil fixed contact is less than the distance between described active contact and described main fixed contact; On described action contact frame, be also fixed with armature, one end away from described contact assembly contact of described armature is articulated with on described coil block, the other end is realized and being moved up and down under the driving of described button assembly, and described armature is provided with the armature resetting means that drives described armature to reset; Described hull outside is provided with for described button assembly being locked in to the locking device in centre position; When described button assembly mediates, the distance between described button assembly and described armature can make described armature be reset to initial position; While connecting circuit, described button assembly drives described armature to move downward, after first described coil moving contact contacts with described coil fixed contact, described in described coil block generation magnetic field suction, armature moves downward, drive and keep described active contact to contact with described main fixed contact, connecting load circuit; After connection, described button assembly moves to described centre position and is locked by described locking device, now after power-off, and described coil block dead electricity, described armature resets under the effect of armature resetting means, and drives described active contact and described main fixed contact to keep released state; During open circuit, described locking device is removed the locking to described button assembly, and described button assembly moves up to initial position, and drives described coil moving contact separated with described coil fixed contact.
Described button assembly is to being extended with pushing part near described armature one side, and described pushing part is positioned at described armature upside, and while driving described button assembly to move down, described pushing part coordinates with described armature realizes armature and move down around described hinged place.
Described button assembly is extended with boss to the side near described coil moving contact, described boss is positioned at described coil moving contact below, while driving described button assembly to move up, described boss coordinates with described coil moving contact to be realized described coil moving contact and moves up.
One side of the close described boss of described coil moving contact end is provided with the extension coordinating with described boss.
Described active contact and described coil moving contact are riveted on respectively the relative both sides of described action contact frame, and described armature is riveted in the centre position of described action contact frame.
Described coil block comprises coil and supports the bracing frame of described coil, and described armature is hinged on the side plate away from described contact one side of support frame as described above.
One end away from described coil block of described armature is provided with groove, and the side plate away from described button assembly of described coil block is provided with upwardly extending projection, and described groove is plugged into realizes described armature in described projection and described coil block is articulated and connected.
Described armature resetting means is extension spring, one end of described extension spring is articulated to the end away from described button assembly of described armature, and making described groove between described extension spring and described button assembly, the other end of described extension spring is connected with the lower end of described coil component coil block.
Described locking device comprises along the direction of motion of described button assembly and is slidably arranged in the connecting rod between described housing and described button assembly, the upper end of described connecting rod is connected with the upper end of described button assembly, the lower end of described connecting rod is hinged with cage knob, described cage knob is provided with lock dog, the outside of described housing is provided with locked groove, and described lock dog rotates and snaps in described locked groove to limit described button assembly motion around jointed shaft.
The below of described button assembly is provided with and drives its push-button reset device moving upward, and described push-button reset device is back-moving spring, and one end of described back-moving spring is against the lower end of described button assembly, and its other end is against the bottom of described housing inner chamber.
One side of the close described active contact of described button assembly is also provided with boss, and described boss extends to the below of described main contact; The described boss of described active contact one side is lower than the described boss of the first side of described coil movable contact.
Beneficial effect of the present invention:
1. in the switch with power-off protection of the present invention, coil moving contact, active contact are flexible member, and button assembly has initial position, centre position and bottom position; And in hull outside, be provided with the locking device that button assembly is locked in to centre position, the distance between coil moving contact and coil fixed contact is less than the distance between active contact and main fixed contact; When button assembly drives armature downwards, coil moving contact is contacted with coil fixed contact, then by coil block, producing magnetic field suction armature moves downward, and then initiatively contact is contacted with main fixed contact, for motor switch On current, after On current, button assembly is upwards reset to centre position, simultaneously locked device locking; Under the magnetic fields producing at solenoid, coil moving contact and coil fixed contact, initiatively contact remains and contacts with main fixed contact.During power failure, the magnetic field that described coil block produces disappears, and coil moving contact is separated with coil fixed contact and main fixed contact respectively under the effect of resetting means with active contact, and now, even if again send a telegram here, electric tool can not worked yet; In addition, the button of cut-offing protecting switch of the present invention is outwards given up the throne without button, even if button assembly is subject to external force pressure, the function of power-off protection still can be realized in its inside, and therefore the switch with power-off protection of the present invention has better security performance.
2. main fixed contact of the present invention is driven by solenoid with the connection of active contact, and response rapidly, guarantees that switch can be by the requirement of testing at a slow speed.
3. circuit disjunction of the present invention is to rely on the boss propelling coil moving contact on button assembly separated with coil fixed contact, after making coil block power-off, magnetic field rapidly disappears, under the effect of extension spring, main fixed contact disconnects rapidly with active contact, and then improves the quick breaking capacity of switch.
4. the side near active contact of button assembly of the present invention is also provided with boss, and make it extend to the vertical below of main contact, it is mainly in order to prevent that initiatively contact and main fixed contact are because working long hours or other reason sticks together cannot disjunction time that this place arranges boss, the boss at this place can promote initiatively contact and move upward, realize pressure disjunction, thereby further improve the breaking capacity of whole switch.
Accompanying drawing explanation
For the content of invention is more likely to be clearly understood, below according to a particular embodiment of the invention and by reference to the accompanying drawings, the present invention is further detailed explanation, wherein
Fig. 1 is the overall structure explosive view of band cut-offing protecting switch of the present invention;
Fig. 2 is the electrical schematic diagram of band cut-offing protecting switch of the present invention;
Fig. 3 is the vertical view of band cut-offing protecting switch of the present invention;
Fig. 4 be of the present invention with cut-offing protecting switch the A-A when the initial position to cutaway view;
Fig. 5 be of the present invention with cut-offing protecting switch the B-B when the initial position to partial sectional view;
Fig. 6 of the present inventionly presses downwards to coil dynamic/static contact and rigidly connects A-A while touching to cutaway view with cut-offing protecting switch;
Fig. 7 of the present inventionly presses downwards to coil dynamic/static contact and rigidly connects B-B while touching to partial sectional view with cut-offing protecting switch;
A-A when Fig. 8 is the coil adhesive armature of band cut-offing protecting switch of the present invention is to cutaway view;
Fig. 9 is that the A-A of band cut-offing protecting switch of the present invention when bottom position is to cutaway view;
Figure 10 is that the A-A of band cut-offing protecting switch of the present invention while mediating is to cutaway view;
Figure 11 is that band cut-offing protecting switch of the present invention mediates, and A-A during power-off is suddenly to cutaway view;
Figure 12 is that band cut-offing protecting switch of the present invention mediates, and B-B during power-off is suddenly to cutaway view;
The structural representation that Figure 13 is boss on button assembly of the present invention when extension on coil moving contact coordinates;
Figure 14 is the structural representation of the another kind of execution mode of button assembly;
Structural representation when Figure 15 is locking device non-locking button assembly of the present invention;
Structural representation when Figure 16 is locking device locking press button assembly of the present invention;
Figure 17 is that the C-C of Figure 15 is to cutaway view.
In figure, Reference numeral is expressed as:
1-housing; 2-button assembly; 3-contact assembly; 31-coil fixed contact; 32-coil moving contact; The main fixed contact of 33-; 34-is contact initiatively; 35-action contact frame; 36-armature; 360-groove; 37-pushing part; 38-boss; 39-extension; 4-coil block; 41-side plate; 410-projection; 5-extension spring; 6-back-moving spring; 71-connecting rod; 72-cage knob; 73-lock dog; 74-locked groove; 75-spring.
Embodiment
Referring to Fig. 1-2, a kind of switch with power-off protection, comprises housing 1; Button assembly 2, described button assembly 2 is slidably mounted on described housing 1 inside; Contact assembly 3, described contact assembly 3 comprises at least one group of coil fixed contact 31 for closing coil assembly 4, coil moving contact 32, and at least one group of main fixed contact 33, active contact 34 that is used for connecting load circuit; In this enforcement, described coil fixed contact 31, described coil moving contact 32, and described main fixed contact 33, described active contact 34 arrange respectively one group, certainly, also can arrange many groups according to specific needs.Described coil fixed contact 31, described main fixed contact 33 are fixedly installed on described housing 1 inside, and described coil moving contact 32, described active contact 34 are fixedly installed on action contact frame 35, and described coil moving contact 32, described active contact 34 are flexible member; Distance between described coil moving contact 32 and described coil fixed contact 31 is less than the distance between described active contact 34 and described main fixed contact 33; On described action contact frame 35, be also fixed with armature 36, one end away from described contact assembly 3 contacts of described armature 36 is articulated with on described coil block 4, and its other end is realized and being moved up and down under the driving of described button assembly 2; Described armature 36 is provided with the armature resetting means that drives described armature 36 to reset, concrete structure as present embodiment, described armature resetting means is extension spring 5, one end of described extension spring 5 is articulated to the end away from described button assembly 2 of described armature 36, and making described groove 360 between described extension spring 5 and described button assembly 2, the other end of described extension spring 5 is connected with the lower end of described coil component coil block 4.The outside of described housing 1 is provided with for described button assembly 2 being locked in to the locking device in centre position; When described button assembly 2 mediates; distance between described button assembly 2 and described armature 36 can make described armature 36 be reset to initial position; now described coil moving contact 32 and described coil fixed contact 31; and described active contact 34 with described main fixed contact 33 respectively in off-state, whole switch is in power-off protection state.
Referring to Fig. 3-10, while connecting circuit, described button assembly 2 drives described armature 36 to move downward, first described coil moving contact 32 contacts with described coil fixed contact 31, described in described coil block 4 generation magnetic field suctions, armature 36 moves downward, drive and keep described active contact 34 to contact with described main fixed contact 33, connecting load circuit; Can there is a certain amount of strain because described armature 36 moves downward in described coil moving contact 32 now, so that described active contact 34 can contact with described main fixed contact 33.After circuit in electric tool is connected, described button assembly 2 moves to described centre position from bottom position, and is locked by described locking device; If now power-off suddenly, the magnetic field that described coil block 4 produces disappears, and described armature 36 resets under the effect of extension spring 5, and drives described active contact 34 and described main fixed contact 33 to keep released state.In the present embodiment, 36, described armature need rotate smaller angle around jointed shaft, can realize described main fixed contact 33 and contacts or disconnect with described active contact 34.
Referring to Figure 11-13, if the circuit of the electric tool of working is disconnected, first to remove the locking to described button assembly 2, then described button assembly 2 is upwards reset to initial position, drive described coil moving contact 32 separated with described coil fixed contact 31.
Concrete structure as the switch with power-off protection of the present invention, in order to make above-mentioned switch disjunction rapid, be that button assembly 2 more easily drives described moving contact 32 to move up, in the present embodiment, described button assembly 2 is extended with boss 38 to the side near described coil moving contact 32, described boss 38 is positioned at described coil moving contact 32 belows, one side of the close described boss 38 of described coil moving contact 32 ends is provided with the extension 39 coordinating with described boss 38, described boss 38 coordinates with described coil moving contact 32 to be realized described coil moving contact 32 and moves up with described button assembly 2.
For button assembly 2 is contacted reliably with described armature, in the present embodiment, described button assembly 2 is to being extended with pushing part 37 near described armature 36 1 sides, described pushing part 37 is positioned at described armature 36 upsides, while driving described button assembly 2 to move down, described pushing part 37 coordinates with described armature 36 realizes armature 36 and moves down around described hinged place.
In the present embodiment, described active contact 34 and described coil moving contact 32 are riveted on respectively the relative both sides of described action contact frame 35, described armature 36 is riveted in the centre position of described action contact frame 35, and making described active contact 34, described coil moving contact 32, the substantially parallel setting of described armature 36, the contact of described coil moving contact 32, described active contact 34 is close to described button assembly 2.
Described coil block 4 comprises coil and supports the bracing frame of described coil, and described armature 36 is hinged on the side plate 41 away from described contact one side of support frame as described above.Above-mentioned articulated structure adopts following concrete structure, one end away from described coil block 4 of described armature 36 is provided with groove 360, the side plate 41 away from described button assembly 2 of described coil block 4 is provided with upwardly extending protruding 410, and described groove 360 is plugged into be realized described armature 36 on described protruding 410 and be articulated and connected with described coil block 4.
Referring to Figure 15-17, in the present embodiment, described locking device comprises along the direction of motion of described button assembly 2 and is slidably arranged in the connecting rod 71 between described housing 1 and described button assembly 2, extend to described button assembly 2 one sides the upper end of described connecting rod 71, and being provided with U-shaped opening, this open card is received in the undergauge section of described button assembly 2 upper ends settings; The lower end of described connecting rod 71 is hinged with cage knob 72, and described cage knob 72 is provided with lock dog 73, and the outside of described housing 1 is provided with locked groove 74, and described lock dog 73 rotates and snaps in described locked groove 74 to limit described button assembly 2 motions around jointed shaft; On connecting rod, be also provided with in addition the spring 75 that forces button assembly 2 to move up to initial position, the upper end of described spring 75 is against the high spot at connecting rod 71 middle parts, and its lower end is against on Switch main body; When button assembly 2 moves upward to centre position by bottom position, press cage knob 72 it is rotated around jointed shaft, and described lock dog 73 is snapped in described locked groove 74, now connecting rod 71 is locked, and button assembly 2 can not move up and down.
Referring to Figure 13, in the present embodiment, the below of described button assembly 2 is provided with and drives its push-button reset device moving upward, and described push-button reset device is back-moving spring 6, one end of described back-moving spring 6 is against the lower end of described button assembly 2, and its other end is against the bottom of described housing 1 inner chamber.Below described button assembly 2, back-moving spring is set, being convenient to described button assembly 2 can be moved upward to centre position from bottom position automatically, or described button assembly 2 is moved to initial position from centre position.Certainly, also described push-button reset device can be set in other embodiments, when described button assembly 2 is resetted, can directly manually button assembly 2 upwards be pulled up to initial position.
Referring to Figure 14, as another embodiment of the invention, a side of the close described active contact 34 of described button assembly 2 is also provided with boss 38, and described boss 38 extends to the below of described main contact 34; The described boss 38 that the described boss 38 of described active contact 34 1 sides is slightly larger than described coil moving contact 32 1 sides to active contact 34 disjunctions distances is to coil moving contact 32 disjunction distances.Boss 38 is set at this place is mainly in order to prevent that initiatively contact 34 and main fixed contact 33 are because Long contact time or other reason stick together cannot disjunction time, the boss 38 at this place is when being moved to initial position by centre position with described button assembly 2, can initiatively promote initiatively contact 34 moves upward, realize and force disjunction, thereby further improve the breaking capacity of whole switch, guarantee Electrical Safety; Under normal circumstances, once the magnetic of coil block 4 disappears, initiatively contact 34 can be separated rapidly under the effect of extension spring 5 with main fixed contact 33, and then guarantee that switch can meet the requirement of the test of disjunction at a slow speed.
Above-mentioned embodiment is just explained in detail technical scheme of the present invention; the present invention has more than and is only confined to above-described embodiment; those skilled in the art should be understood that; the above-mentioned principle of every foundation and the improvement of spirit on basis of the present invention, substitute, all should be within protection scope of the present invention.
Claims (11)
1. with a switch for power-off protection, comprise housing (1); Button assembly (2), described button assembly (2) is slidably mounted on described housing (1) inside; Contact assembly (3), described contact assembly (3) comprises at least one group of coil fixed contact (31) for closing coil assembly (4), coil moving contact (32), and at least one group of main fixed contact (33), active contact (34) that is used for connecting load circuit;
It is characterized in that:
Described coil fixed contact (31), described main fixed contact (33) are fixedly installed on described housing (1) inside, it is upper that described coil moving contact (32), described active contact (34) are fixedly installed on action contact frame (35), and described coil moving contact (32) is flexible member; Distance between described coil moving contact (32) and described coil fixed contact (31) is less than the distance between described active contact (34) and described main fixed contact (33); On described action contact frame (35), be also fixed with armature (36), one end away from described contact assembly (3) contact of described armature (36) is articulated with on described coil block (4), the other end is realized and being moved up and down under the driving of described button assembly (2), and described armature (36) is provided with the armature resetting means that drives described armature (36) to reset;
Described housing (1) outside is provided with for described button assembly (2) being locked in to the locking device in centre position; When described button assembly (2) mediates, the distance between described button assembly (2) and described armature (36) can make described armature (36) be reset to initial position;
While connecting circuit, described button assembly (2) drives described armature (36) to move downward, after described coil moving contact (32) first contacts with described coil fixed contact (31), described in described coil block (4) generation magnetic field suction, armature (36) moves downward, drive and keep described active contact (34) to contact with described main fixed contact (33), connecting load circuit; After connection, described button assembly (2) moves to described centre position and is locked by described locking device, now after power-off, described coil block (4) dead electricity, described armature (36) resets under the effect of armature resetting means, and drives described active contact (34) and described main fixed contact (33) to keep released state; During open circuit, described locking device is removed the locking to described button assembly (2), and described button assembly (2) moves up to initial position, and drives described coil moving contact (32) separated with described coil fixed contact (31).
2. a kind of switch with power-off protection according to claim 1; it is characterized in that: described button assembly (2) is to being extended with pushing part (37) near described armature (36) one sides; described pushing part (37) is positioned at described armature (36) upside; while driving described button assembly (2) to move down, described pushing part (37) coordinate with described armature (36) and realize described armature (36) and move down around described hinged place.
3. a kind of switch with power-off protection according to claim 1 and 2; it is characterized in that: described button assembly (2) is extended with boss (38) to the side near described coil moving contact (32); described boss (38) is positioned at described coil moving contact (32) below; while driving described button assembly (2) to move up, described boss (38) coordinates with described coil moving contact (32) to be realized described coil moving contact (32) and moves up.
4. a kind of switch with power-off protection according to claim 3, is characterized in that: a side of the close described boss (38) of described coil moving contact (32) end is provided with the extension (39) coordinating with described boss (38).
5. according to the arbitrary described a kind of switch with power-off protection of claim 1-4; it is characterized in that: described active contact (34) and described coil moving contact (32) are riveted on respectively the relative both sides of described action contact frame (35), and described armature (36) is riveted in the centre position of described action contact frame (35).
6. according to the arbitrary described a kind of switch with power-off protection of claim 1-5; it is characterized in that: described coil block (4) comprises coil and support the bracing frame of described coil, described armature (36) is hinged on the side plate (41) away from described contact one side of support frame as described above.
7. according to the arbitrary described a kind of switch with power-off protection of claim 1-6; it is characterized in that: one end away from described coil block (4) of described armature (36) is provided with groove (360); the side plate away from described button assembly (2) of described coil block (4) (41) is provided with upwardly extending projection (410), and described groove (360) is plugged into be realized described armature (36) and be articulated and connected with described coil block (4) in described projection (410).
8. according to the arbitrary described a kind of switch with power-off protection of claim 1-7; it is characterized in that: described armature resetting means is extension spring (5); one end of described extension spring (5) is articulated to the end away from described button assembly (2) of described armature (36); and described groove (360) is positioned between described extension spring (5) and described button assembly (2), the other end of described extension spring (5) is connected with the lower end of described coil component coil block (4).
9. according to the arbitrary described a kind of switch with power-off protection of claim 1-8, it is characterized in that: described locking device comprises along the direction of motion of described button assembly (2) and is slidably arranged in the connecting rod (71) between described housing (1) and described button assembly (2), the upper end of described connecting rod (71) is connected with the upper end of described button assembly (2), the lower end of described connecting rod (71) is hinged with cage knob (72), described cage knob (72) is provided with lock dog (73), the outside of described housing (1) is provided with locked groove (74), described lock dog (73) rotates and snaps in described locked groove (74) to limit described button assembly (2) motion around jointed shaft.
10. according to the arbitrary described a kind of switch with power-off protection of claim 1-9; it is characterized in that: the below of described button assembly (2) is provided with and drives its push-button reset device moving upward; described push-button reset device is back-moving spring (6); one end of described back-moving spring (6) is against the lower end of described button assembly (2), and its other end is against the bottom of described housing (1) inner chamber.
11. according to the arbitrary described a kind of switch with power-off protection of claim 3-10, it is characterized in that: a side of the close described active contact (34) of described button assembly (2) is also provided with boss (38), and described boss (38) extends to the below of described main contact (34); The described boss (38) of described active contact (34) one sides is lower than the described boss (38) of described coil moving contact (32) one sides.
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| CN201310544210.2A CN103531377B (en) | 2013-11-06 | 2013-11-06 | A kind of switch with power-off protection |
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| CN201310544210.2A CN103531377B (en) | 2013-11-06 | 2013-11-06 | A kind of switch with power-off protection |
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| CN103531377A true CN103531377A (en) | 2014-01-22 |
| CN103531377B CN103531377B (en) | 2015-09-23 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104538216A (en) * | 2014-12-25 | 2015-04-22 | 宁波卡派斯电子科技有限公司 | Button switch with power-off protection module |
| CN108257830A (en) * | 2018-03-21 | 2018-07-06 | 浙江中讯电子有限公司 | A kind of earth leakage protective device |
| CN109586372A (en) * | 2018-12-14 | 2019-04-05 | 戚春凤 | A kind of auto-cutout protective device of mobile phone charging head |
| CN109920665A (en) * | 2019-04-17 | 2019-06-21 | 曹宁 | A kind of electromagnetism axle-centre lock electric power switch unit |
| CN111899996A (en) * | 2020-08-12 | 2020-11-06 | 河南中烟工业有限责任公司 | Automatic cut-off method for low-voltage reverse power transmission of power distribution network |
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| CN201311882Y (en) * | 2008-11-13 | 2009-09-16 | 浙江科都电气制造有限公司 | Electromagnetic switch provided with locking mechanism |
| EP2187419A2 (en) * | 2008-11-14 | 2010-05-19 | Chunkai Zheng | Relay-switch |
| CN103280359A (en) * | 2013-06-04 | 2013-09-04 | 科都电气有限公司 | Pressed-type switch with kick function |
| CN203521230U (en) * | 2013-11-06 | 2014-04-02 | 科都电气有限公司 | Switch with power-off protection |
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| CN104538216A (en) * | 2014-12-25 | 2015-04-22 | 宁波卡派斯电子科技有限公司 | Button switch with power-off protection module |
| CN108257830A (en) * | 2018-03-21 | 2018-07-06 | 浙江中讯电子有限公司 | A kind of earth leakage protective device |
| CN108257830B (en) * | 2018-03-21 | 2024-03-01 | 浙江中讯电子有限公司 | Leakage protector |
| CN109586372A (en) * | 2018-12-14 | 2019-04-05 | 戚春凤 | A kind of auto-cutout protective device of mobile phone charging head |
| CN109586372B (en) * | 2018-12-14 | 2022-06-07 | 中山市昌迪电子有限公司 | Automatic circuit-breaking protection device for mobile phone charging head |
| CN109920665A (en) * | 2019-04-17 | 2019-06-21 | 曹宁 | A kind of electromagnetism axle-centre lock electric power switch unit |
| CN111899996A (en) * | 2020-08-12 | 2020-11-06 | 河南中烟工业有限责任公司 | Automatic cut-off method for low-voltage reverse power transmission of power distribution network |
| CN111899996B (en) * | 2020-08-12 | 2022-08-19 | 河南中烟工业有限责任公司 | Automatic cut-off method for low-voltage reverse power transmission of power distribution network |
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| CN103531377B (en) | 2015-09-23 |
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Address after: 325608 Puqi Industrial Zone, Hongqiao Town, Leqing City, Wenzhou City, Zhejiang Province Patentee after: Kedu Electric Co.,Ltd. Address before: 325608 Block C, Puqi Industrial Zone, Hongqiao Town, Yueqing City, Wenzhou City, Zhejiang Province Patentee before: KEDU ELECTRIC Co.,Ltd. |
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