CN108417460B - Leakage protection action mechanism irrelevant to power supply voltage - Google Patents
Leakage protection action mechanism irrelevant to power supply voltage Download PDFInfo
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- CN108417460B CN108417460B CN201810468156.0A CN201810468156A CN108417460B CN 108417460 B CN108417460 B CN 108417460B CN 201810468156 A CN201810468156 A CN 201810468156A CN 108417460 B CN108417460 B CN 108417460B
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- 238000012360 testing method Methods 0.000 claims description 41
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 12
- 229910052742 iron Inorganic materials 0.000 claims description 6
- 230000005611 electricity Effects 0.000 claims description 5
- 230000000149 penetrating effect Effects 0.000 claims description 4
- 230000001939 inductive effect Effects 0.000 claims 2
- 230000005484 gravity Effects 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 4
- KTXUOWUHFLBZPW-UHFFFAOYSA-N 1-chloro-3-(3-chlorophenyl)benzene Chemical compound ClC1=CC=CC(C=2C=C(Cl)C=CC=2)=C1 KTXUOWUHFLBZPW-UHFFFAOYSA-N 0.000 description 22
- 230000001012 protector Effects 0.000 description 12
- 238000003825 pressing Methods 0.000 description 9
- 210000001503 joint Anatomy 0.000 description 4
- 230000006698 induction Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000003578 releasing effect Effects 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
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- 239000000741 silica gel Substances 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/10—Operating or release mechanisms
- H01H71/12—Automatic release mechanisms with or without manual release
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/10—Operating or release mechanisms
- H01H71/12—Automatic release mechanisms with or without manual release
- H01H71/24—Electromagnetic mechanisms
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/10—Operating or release mechanisms
- H01H71/50—Manual reset mechanisms which may be also used for manual release
- H01H71/58—Manual reset mechanisms which may be also used for manual release actuated by push-button, pull-knob, or slide
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Switch Cases, Indication, And Locking (AREA)
- Push-Button Switches (AREA)
Abstract
The invention discloses a leakage protection action mechanism irrelevant to power supply voltage, which comprises a base and a transformer, wherein the base and the transformer are arranged side by side, the base is provided with a PCB and a conducting strip which are in contact with each other and are electrically connected, the PCB is connected in series with a power supply of an external electric appliance through the conducting strip, the base is provided with an elastic switch mechanism for driving the conducting strip to contact or separate from the PCB, the base is also provided with a transmission mechanism matched with the switch mechanism to lock the switch mechanism, the base is also provided with an electromagnetic release electrically connected with the transformer, the output end of the electromagnetic release is connected with the transmission mechanism, the transformer is close to the PCB, and the base is also provided with a reset device for driving the conducting strip to be in contact with the PCB in a restoration way. The invention takes the electromagnetic release as an intermediate mechanism, and the action process of power-off protection is irrelevant to the power supply voltage, so that the invention is safer and more reliable.
Description
Technical Field
The invention relates to the technical field of leakage protectors, in particular to a leakage protection action mechanism irrelevant to power supply voltage.
Background
The current market of the leakage protector is divided into two types, namely an electronic leakage protector, and the working principle of the leakage protector is as follows: the transistor amplifier is used as an intermediate mechanism, when leakage occurs, the leakage is amplified by the amplifier and then transmitted to the relay, and the relay controls the switch to disconnect the power supply. The second type is an electromagnetic leakage protector, and the working principle of the electromagnetic leakage protector is as follows: an electromagnetic release is used as an intermediate mechanism, and when leakage current occurs, the mechanism is released to disconnect a power supply. However, in the aspect of the mobile leakage protector, only an electronic leakage protector is available in the market at present, but the electronic leakage protector has the fatal defect that if leakage occurs when the power supply voltage is undervoltage, the protection device cannot trip. Personal safety is not guaranteed in this case; in addition, the transistor has weak impact resistance and poor environmental interference resistance; an auxiliary working power supply (an electronic amplifier generally needs a direct current power supply of tens of volts) is needed, so that the leakage characteristic is influenced by the fluctuation of working voltage; when the main circuit lacks phase, the protector can lose the protect function, and the security is relatively poor.
Disclosure of Invention
In view of the above, an object of the present invention is to provide a leakage protection operating mechanism having excellent safety performance irrespective of a power supply voltage.
The invention adopts the technical proposal for solving the technical problems that:
The utility model provides an irrelevant earth leakage protection actuating mechanism with supply voltage, includes base and mutual-inductor that sets up side by side, be equipped with mutual contact and electrically connected PCB board and conducting strip on the base, the PCB board is established ties through the power of conducting strip and external electrical apparatus, be equipped with on the base and be used for driving the elastic switch mechanism of conducting strip contact or breaking away from the PCB board, still be equipped with on the base with the switch mechanism cooperation is in order to lock the drive mechanism, still be equipped with on the base with the electromagnetic release that the mutual-inductor electricity is connected, the output of electromagnetic release with drive mechanism connects, the mutual-inductor is pressed close to with the PCB board, and when external electrical apparatus electric leakage, the current increases in the PCB board and makes the mutual-inductor in produce corresponding induction current, and the electromagnetic force that induction current produced drives the output of electromagnetic release outwards ejects and drives drive mechanism and break away from switch mechanism for switch mechanism elastic recovery and drive the conducting strip breaks away from the PCB board in order to cut off the power of external electrical apparatus, still be equipped with on the base and be used for driving the reset device that the conducting strip and the PCB board resumes contact.
Preferably, the switch mechanism comprises a cross arm connected with the conducting strip, the cross arm and the conducting strip are both located below the PCB, the cross arm is provided with a first vertical jack, the reset device comprises a reset key and a first elastic piece for driving the reset key to move upwards, the reset key is provided with a rod-shaped first pushing and pressing part, the first pushing and pressing part is penetrated in the first jack, a clamping groove is formed in the left side part of the first pushing and pressing part, a second jack opposite to the clamping groove is formed in the side wall of the first jack, the switch mechanism further comprises a locking device penetrating through the second jack, the right end part of the locking device is inserted into the clamping groove of the first pushing and pressing part, the switch mechanism further comprises a connecting rod hinged to the base and a fourth elastic piece for driving the connecting rod to rotate anticlockwise, the head end of the connecting rod is locked with the transmission mechanism to limit anticlockwise rotation, the tail end of the connecting rod is abutted to the locking device, and when the connecting rod is separated from the transmission mechanism, and the elastic piece is driven by the fourth elastic piece to move downwards by the elastic piece to drive the conducting strip to move downwards or the PCB.
Preferably, the mortise lock device comprises a transmission shaft and a lock catch, wherein the transmission shaft and the lock catch are arranged on the base in a sliding manner, the left end part of the lock catch is arranged at the right end part of the transmission shaft in a vertical moving manner through a chute structure, and the tail end of the connecting rod is in butt joint with the left end part of the transmission shaft.
Preferably, a first guide sleeve capable of guiding left and right is arranged on the base, and the transmission shaft is arranged in the first guide sleeve in a sliding penetrating mode.
Preferably, the fourth elastic member is a spring plate.
Preferably, the transmission mechanism comprises a buckle locked with the head end of the connecting rod, the buckle is positioned on the right side of the connecting rod, the transmission mechanism further comprises a transmission rod capable of sliding left and right along the base, the left end of the transmission rod is connected with the right side part of the buckle, the second elastic piece is connected between the side walls of the right end base of the transmission rod, the transmission mechanism further comprises a transmission sheet hinged on the base and a transmission hinge hinged on the base, the output end of the electromagnetic release is in butt joint with the head end of the transmission sheet and can drive the transmission sheet to rotate, the tail end of the transmission sheet is in butt joint with the head end of the transmission hinge and can drive the transmission hinge to rotate, the transmission rod further comprises a side lug, the tail end of the transmission hinge is in butt joint with the left wall of the side lug, and when the output end of the electromagnetic release is ejected outwards, the transmission sheet is driven to rotate, and then the transmission hinge is driven to rotate so as to push the transmission rod to move rightwards and separate from the connecting rod.
Preferably, the base is provided with a bearing seat capable of guiding left and right, and the transmission rod is arranged in the bearing seat in a sliding way.
Preferably, the reset key is provided with a second pushing part for driving the electromagnetic release to reset, the head end of the transmission piece is positioned between the second pushing part and the output end of the electromagnetic release, a second elastic piece for driving the buckle to reset leftwards is arranged between the base and the transmission rod, when the output end of the electromagnetic release is pushed outwards, the second elastic piece is pushed by the tail end of the transmission hinge to elastically deform, the head end of the connecting rod is positioned below the first pushing part and can be pushed by the first pushing part to rotate clockwise, the base is provided with a third elastic piece for driving the mortise lock device to insert into the clamping groove, the elastic force of the third elastic piece is smaller than that of the fourth elastic piece, when the reset key is pressed, the first elastic piece elastically deforms, the output end of the electromagnetic release is pushed inwards by the second pushing part to enable the armature and the early iron of the electromagnetic release to be attracted, the second elastic piece is elastically restored and drives the buckle to reset leftwards, the connecting rod is pushed by the first pushing part to rotate and can be pushed by the first pushing part to be inserted into the clamping groove to elastically deform, and the connecting rod is elastically deformed by the reset cross arm is driven by the elastic piece to reset, and the elastic piece is elastically deformed by the reset cross arm is driven to be in contact with the reset plate when the elastic piece is pushed by the fourth elastic piece to reset key.
Preferably, a cover plate fixed relative to the base is arranged above the base, an indication sheet capable of moving relative to the cover plate is arranged on the cover plate, a line closing indication part is arranged on the indication sheet, and an indication window opposite to the line closing indication part is arranged on the cover plate. One end of the indicating piece is provided with a first pushing inclined plane, the side part of the reset key is provided with a second pushing inclined plane which is attached to the first pushing inclined plane, and when the mortise lock device is separated from the clamping groove so that the conducting piece is separated from the PCB, the reset key is driven by the elastic force of the first elastic piece to move upwards, and then the indicating piece is pushed by the second pushing inclined plane so that the line closing indicating part is staggered with the indicating window.
Preferably, the indicating piece is further provided with a circuit disconnection indicating part, when the locking device is separated from the clamping groove so that the conducting piece is separated from the PCB, the indicating piece moves to the position where the circuit disconnection indicating part is opposite to the indicating window relative to the cover plate, a fifth elastic piece for driving the indicating piece to move is arranged between the indicating piece and the cover plate, and when the reset key is pressed down, the indicating piece is driven by the elastic force of the fifth elastic piece and moves to the position where the circuit closing indicating part is opposite to the indicating window relative to the cover plate.
Preferably, the PCB board is provided with a test seat and two test contacts, the test seat is movably provided with a test needle above the test contacts, a sixth elastic piece for driving the test needle to reset upwards is further arranged between the test needle and the PCB board, and the two test contacts can be electrically connected when the test needle moves downwards so as to enable the PCB board to be in short circuit.
Preferably, the top of the test needle is provided with a test key.
Preferably, the mutual inductor is a zero sequence mutual inductor.
The beneficial effects of the invention are as follows: the invention takes the electromagnetic release as the intermediate mechanism, only the transformer detects leakage current, and the leakage current value reaches the action value of the electromagnetic release, the electromagnetic release is released, the output end of the electromagnetic release is ejected outwards and drives the transmission mechanism to separate from the switching mechanism, and then the switching mechanism is elastically restored and drives the conducting strip to separate from the PCB to cut off the power supply of an external electrical appliance. The action process of the invention is irrelevant to the power supply voltage, and is safer and more reliable. In addition, the structure of the invention is independent and movable, and for any electric appliance needing leakage protection, the power supply of the electric appliance is connected with the PCB in series through the conducting strip, so that the invention has wide applicability and can replace a fixed electromagnetic protector on the electric appliance to reduce the production cost of the electric appliance.
Drawings
The invention will be described in further detail with reference to the drawings and the detailed description.
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a cross-sectional view of the present invention with the line closed;
FIG. 3 is an enlarged partial view of portion A of FIG. 2;
FIG. 4 is a schematic view of the main part of the present invention when the line is closed;
fig. 5 is an exploded view of the present invention.
Detailed Description
Referring to fig. 1 to 5, an embodiment of the present invention proposes a leakage protection actuating mechanism irrelevant to a power supply voltage, including a base 1 and a transformer 2 disposed side by side, where the base 1 is provided with a PCB 11 and a conductive sheet 12 that are in contact with each other and electrically connected, the PCB 11 is connected in series with a power supply of an external electrical apparatus through the conductive sheet 12, the base 1 is provided with an elastic switching mechanism for driving the conductive sheet 12 to contact or separate from the PCB 11, the base 1 is further provided with a transmission mechanism that cooperates with the switching mechanism to lock the switching mechanism, the base is further provided with an electromagnetic release 14 that is electrically connected with the transformer 2, an output end of the electromagnetic release 14 is connected with the transmission mechanism, the transformer 2 is close to the PCB 11, when an external electrical apparatus leaks electricity, a current in the PCB 11 increases and causes a corresponding induced current in the transformer 2, and an electromagnetic force generated in the electromagnetic release 14 drives the output end 141 of the electromagnetic release 14 to eject outwards and drive the transmission mechanism to recover the switching mechanism, so that the switching mechanism elastically recovers and drives the conductive sheet 12 to separate from the conductive sheet 11 to separate from the PCB 11, and the PCB 11 is further provided with the transmission mechanism for recovering the PCB 11 from the power supply 11.
The electromagnetic release 14 is used as an intermediate mechanism, and as long as the transformer 2 detects leakage current, the leakage current reaches the action value of the electromagnetic release 14, the electromagnetic release is released, the output end of the electromagnetic release is ejected outwards and drives the transmission mechanism to be separated from the switching mechanism, and then the switching mechanism is elastically restored and drives the conducting strip 12 to be separated from the PCB 11 so as to cut off the power supply of the protected external electric appliance. The action process of the invention is irrelevant to the power supply voltage, and is safer and more reliable. In addition, the structure of the invention is independently movable, and for any electric appliance needing leakage protection, the power supply of the electric appliance is only connected with the PCB 11 in series through the conducting strip 12, so that the invention has wide applicability and can replace a fixed electromagnetic protector on the electric appliance to reduce the production cost of the electric appliance.
Referring to fig. 2 to 4, the switch mechanism includes a cross arm 51 connected with the conductive sheet 12, the cross arm 51 and the conductive sheet 12 are both located below the PCB 11, the cross arm 51 has a vertical first jack 511, the reset device includes a reset key 31 and a first elastic member 32 for driving the reset key 31 to move upward, the reset key 31 has a rod-shaped first pushing part 311, the first pushing part 311 is penetrated in the first jack 511, a clamping slot 310 is disposed on the left side of the first pushing part 311, a second jack 512 opposite to the clamping slot 310 is disposed on a side wall of the first jack 511, the switch mechanism further includes a latch device penetrating in the second jack 512, the right end of the latch device is inserted in the clamping slot 310 of the first pushing part 311, the switch mechanism further includes a connecting rod 54 hinged on the base 1 and a fourth elastic member 55 for driving the connecting rod 54 to rotate counterclockwise, when the front end of the connecting rod 54 is blocked by the transmission mechanism and the tail end of the connecting rod 54 is penetrated in the first jack 511, the left elastic member is separated from the conductive sheet 12 when the conductive sheet is elastically deformed from the conductive sheet 12, and the conductive sheet is elastically deformed from the side of the PCB 11, and the conductive sheet is then elastically deformed from the jack 54 to move counterclockwise.
In this embodiment, the connecting rod 54 is rigid, the fourth elastic member 55 is a spring, and one end of the fourth elastic member 55 abuts against the bottom of the head end of the connecting rod 54. The mortise lock device comprises a transmission shaft 53 and a lock catch 52 which are arranged on the base 1 in a sliding manner, wherein the left end part of the lock catch 52 is arranged at the right end part of the transmission shaft 53 in a vertical moving manner through a chute structure, and the tail end of the connecting rod 54 is abutted with the left end part of the transmission shaft 53. In order to improve the smoothness of the motion, the base 1 is provided with a first guide sleeve capable of guiding left and right, and the transmission shaft 53 is slidably inserted into the first guide sleeve.
Referring to fig. 2 and 4, the transmission mechanism includes a latch 44 that is locked to the head end of the connecting rod 54, the latch 44 is located at the right side of the connecting rod 54, the transmission mechanism further includes a transmission rod 41 that can slide left and right along the base 1, the left end of the transmission rod 41 is connected to the right side of the latch 44, the second elastic member 40 is connected between the side walls of the right end base 1 of the transmission rod 41, the transmission mechanism further includes a transmission piece 43 hinged to the base 1 and a transmission hinge 42 hinged to the base 1, the output end 141 of the electromagnetic release 14 abuts against the head end of the transmission piece 43 and can drive the transmission piece 43 to rotate, the tail end of the transmission piece 43 abuts against the head end of the transmission hinge 42 and can drive the transmission hinge 42 to rotate, the transmission rod 41 further has a side ear 411, the tail end of the transmission hinge 42 abuts against the left wall of the side ear 411, and when the output end 141 of the electromagnetic release 14 is ejected outwards, drives the transmission piece 43 to rotate, and then drives the transmission hinge 42 to rotate to push the transmission piece 41 to move rightwards so as to disengage from the connecting rod 54. In order to improve the smoothness of the motion, the base 1 is provided with a bearing seat capable of guiding left and right, and the transmission rod 41 is slidably inserted into the bearing seat.
The switch mechanism and the transmission mechanism are designed into the structure, the whole structure is very compact, the mutual action coordination is high, once the protected external electric appliance leaks electricity, the electromagnetic release 14 can be released, but in the embodiment, the switch mechanism and the transmission mechanism amplify the releasing action of the electromagnetic release 14 through the matching of the buckle 44 and the connecting rod 54, the elastic force of the fourth elastic piece 55 and the like, the sensitivity is improved, and meanwhile, the high accuracy of the action is maintained.
In addition, the switching mechanism can also take other structural forms, such as: the connecting rod 34 is hinged to the base 1 and located below the PCB, the head end of the connecting rod 34 is locked with the buckle 14, the tail end of the connecting rod is connected with the conducting strip 12, the conducting strip 12 is in contact electrical connection with the PCB, and the base 1 is further provided with a spring piece for driving the connecting rod 34 to rotate so that the conducting strip 12 is separated from the PCB. When the circuit is closed, the head end of the connecting rod 34 is locked with the buckle 12, the elastic sheet is in a compressed state, the conducting strip 12 is in contact with the PCB, when the protected external electric appliance leaks electricity, the buckle 44 is separated from the connecting rod 34, the elastic sheet of the connecting rod 34 is driven to rotate by elastic force, and then the conducting strip 12 is driven to be separated from the PCB. The transmission mechanism may also take other structural forms, for example, the transmission mechanism only comprises a buckle 44 directly connected with the output end 141 of the electromagnetic release 14, the buckling part of the buckle 44 is arranged at the upper end and positioned at the right side of the connecting rod 34, and the output end 141 of the electromagnetic release 14 is fixedly connected with the lower end of the buckle 44 and can push the buckle 44 rightward when releasing.
Referring to fig. 1 and 2, the reset key 31 has a second pushing portion 312 for driving the electromagnetic release 14 to reset, a head end of the driving plate 43 is located between the second pushing portion 312 and an output end 141 of the electromagnetic release 14, a second elastic member 40 for driving the latch 44 to reset to the left is disposed between the base 1 and the driving rod, when the output end 141 of the electromagnetic release 14 is pushed out, the second elastic member 40 is pushed by a tail end of the driving hinge 42 to elastically deform, a head end of the connecting rod 54 is located below the first pushing portion 311 and can be pushed by the first pushing portion 311 to rotate clockwise, a third elastic member 50 for driving the latch to insert into the clamping slot 310 is disposed on the base 1, an elastic force of the third elastic member 50 is smaller than an elastic force of the fourth elastic member 55, when the reset key 31 is pressed, the first elastic member 32 elastically deforms, the output end 141 of the electromagnetic release 14 is pushed by the second pushing portion 312 to retract inwards so that the armature and the early iron of the electromagnetic release 14 are attracted, the second elastic member 40 elastically restores and drives the buckle 44 to return to the left, the connecting rod 54 is pushed by the first pushing portion 311 to rotate to be locked with the buckle 44, the fourth elastic member 55 is pushed by the connecting rod 54 to elastically deform, the third elastic member 50 elastically restores and drives the mortise lock device to be inserted into the clamping groove 310 to lock the reset key 31 and the cross arm 51, and when the reset key 31 is released, the reset key 31 is driven by the elastic force of the first elastic member 32 to drive the cross arm 51 to move upwards so that the conductive sheet 12 is contacted with the PCB 11.
The reset device adopts the structure, the circuit can be recovered to be closed only by one pressing action, and all the action parts are recovered to the original state of circuit closing, so that the reset device is very convenient to use.
In this embodiment, a cover plate 60 fixed to the base 1 is disposed above the base 1, an indication sheet 61 movable relative to the cover plate 60 is disposed on the cover plate 60, a line closing indication portion is disposed on the indication sheet 61, and an indication window 601 opposite to the line closing indication portion is disposed on the cover plate 60. One end of the indicator piece 61 is provided with a first pushing inclined plane 610, the side part of the reset key 31 is provided with a second pushing inclined plane 315 attached to the first pushing inclined plane 610, and when the mortise lock device is separated from the clamping groove 310 so that the conductive piece 12 is separated from the PCB 11, the reset key 31 is driven by the elastic force of the first elastic piece 32 to move upwards, and then the indicator piece 61 is pushed by the second pushing inclined plane 315 so as to stagger the line closing indicator part from the indicator window 601. The line closure indicating part can adopt a specific color as a sign, in this embodiment, the line closure indicating part is a red block on the indicating sheet 61, and when the line is closed, a user can see the red block through the indicating window, so that the user can know that the line is in a closed state; when the line is disconnected, the red block is staggered from the indication window 601, and the user cannot see the red block, so that the user can know that the line is in a disconnected state.
In order to further improve the recognition degree of the two states of the line closing state and the line breaking state, the indicating sheet 61 is further provided with a line breaking indicating part, when the mortise lock device is separated from the clamping groove 310 so that the conductive sheet 12 is separated from the PCB 11, the indicating sheet 61 moves relative to the cover plate until the line breaking indicating part is opposite to the indicating window 601, a fifth elastic member 62 for driving the indicating sheet 61 to move is arranged between the indicating sheet 61 and the cover plate 60, and when the reset key 31 is pressed down, the indicating sheet 61 is driven by the elastic force of the fifth elastic member 62 and moves relative to the cover plate until the line closing indicating part is opposite to the indicating window 601. In the present embodiment, the line disconnection indicating portion is a black block on the indicating sheet 61.
Referring to fig. 2 and 5, the PCB 11 is provided with a test seat 71 and two test contacts, a test needle 72 located above the test contacts is movably disposed on the test seat 71, a sixth elastic member 73 for driving the test needle 72 to reset upwards is further disposed between the test needle 72 and the PCB 11, and when the test needle 72 moves downwards, the two test contacts can be electrically connected to short-circuit the PCB 11. The top of the test pin 72 is provided with a test key 74. Pressing test key 74 short circuits the PCB via test pin 72 to test whether the product is acceptable, if the circuit is immediately broken, the product is acceptable, if the circuit is still closed, the product is unacceptable.
In this embodiment, the transformer 2 is a zero sequence transformer, and the first elastic member 32, the second elastic member 40, the third elastic member 50, the fifth elastic member 62, and the sixth elastic member 73 are all springs. Of course, the elastic members may also be common elements such as torsion springs and spring plates. In order to ensure insulation and to improve the comfort of use, the test key 74, the reset key 31 and the cover plate 60 are covered with a layer of silica gel 8.
Line disconnection principle:
A. Referring to fig. 2 and 3, when leakage occurs in the power circuit, the current on the PCB 11 is suddenly increased, when the transformer 2 detects the increased current, the leakage current is transmitted to the electromagnetic release 14 in a reduced proportion by the turns ratio of the primary coil and the secondary coil wound around the transformer 2, when the leakage current can offset the attraction force between the armature and the early iron magnet of the electromagnetic release 14 through the electromagnetic force generated by the coil of the electromagnetic release 14, the armature of the electromagnetic release 14 rotates clockwise under the pulling force of the spring connected to one end of the armature inside the electromagnetic release 14, the armature rotates upward to drive the output end 141 of the electromagnetic release 14 to move upward, the output end 141 moves upward to push the driving piece 43 to rotate clockwise, the rotation of the driving piece 43 drives the driving hinge 42 to rotate counterclockwise, the rotation of the transmission hinge 42 drives the transmission rod 41 and the buckle 44 fixed on the transmission rod 41 to move horizontally along the direction away from the connecting rod 54, when moving for a certain distance, the buckle 44 is separated from the connecting rod 54, the connecting rod 54 rotates anticlockwise under the action of the torsion elastic force of the fourth elastic member 55, the rotation of the connecting rod 54 drives the transmission shaft 53 abutted with the connecting rod 54 and the lock catch 52 clamped in the clamping groove of the transmission shaft 53 to move leftwards, when moving for a certain distance, the lock catch 52 is completely removed from the clamping groove 310 of the reset key 31, the reset key 31 is pushed by the elastic force of the first elastic member 32 to move upwards, the tension of the first elastic member 32 is lost after the lock catch 52 is separated from the clamping groove 310 of the reset key 31, the cross arm 51 moves downwards under the action of the elastic force of the conductive sheet 12, the movable contact on the conductive sheet 12 is rapidly separated from the stationary contact on the PCB 11 to complete the breaking of the whole circuit.
B. when the reset key 31 moves upward, the second pushing inclined surface 315 pushes the indicator piece 61 to move horizontally away from the reset key 31, so that the black block on the indicator piece 61 is displayed in the indicator window of the cover plate 60, and the whole line is broken.
Line closing theory of operation:
A. when the reset key 31 is pressed forcibly, the first pressing portion 311 of the reset key 31 pushes the link 54 to rotate clockwise until being caught by the catch 44.
B. In the clockwise rotation of the connecting rod 54, the transmission shaft 53 drives the lock catch 52 to move towards the cross arm 51 under the pushing of the elastic force of the third elastic member 50, and when the head end of the connecting rod 54 is buckled into the clamping groove of the buckle 44, the lock catch 52 moves towards the cross arm 51 all the time under the pushing of the elastic force of the third elastic member 50 until being inserted into the clamping groove 310 of the reset key 31.
C. In the process of pressing the reset key 31, the second pressing portion 312 of the reset key 31 presses the head end of the driving piece 43 downward, so that the driving piece 43 rotates counterclockwise, and the head end of the driving piece 43 presses the output end 141 of the electromagnetic release 14 downward until the armature of the electromagnetic release 14 is attracted to the early iron, so that the electromagnetic release 14 is reset.
D. When the transmission plate 43 is pushed by the second pushing part 312 to rotate counterclockwise, the transmission hinge 42 is not pushed by the transmission plate 43, and the transmission rod 41 and the buckle 44 mounted on the transmission rod 41 move leftward together under the pushing of the elastic force of the third elastic member 50 until the stop on the transmission rod 41 is pressed against the right end face of the bearing block.
E. after the operator presses the reset key 31, the operator releases the hand, the reset key 31 loses downward thrust, under the action of the elastic force of the first elastic member 32, the reset key 31 pulls the lock catch 52 and the cross arm 51 sleeved on the lock catch 52 to move upwards together, and the conductive sheet 12 on the cross arm 51 moves upwards along with the cross arm 51 until contacting with the stationary contact on the PCB 11.
F. When the reset key 31 is pressed, the indicator piece 61 moves towards the reset key 31 under the pushing force of the fifth elastic piece 62, so that the red block on the indicator piece 61 is displayed in the indicator window of the cover plate 60, and the whole circuit is closed.
Testing working principle:
A. When the test key 74 is pressed, the test needle 72 will contact with the test point on the PBC board to generate a short-circuit current, when the transformer 2 detects the short-circuit current, the leakage current will be transmitted to the electromagnetic release 14 in a reduced proportion through the turns ratio of the primary coil and the secondary coil of the transformer 2, when the leakage current can offset the attraction force of the armature and the early iron magnet of the electromagnetic release 14 through the electromagnetic force generated by the coil of the electromagnetic release 14, the armature of the electromagnetic release 14 will rotate clockwise under the pulling force of the spring connected to one end of the armature inside the electromagnetic release 14, the armature will drive the output end 141 of the electromagnetic release 14 to move upwards when rotating upwards, the output end 141 moves upwards to push the driving piece 43 to rotate clockwise, the rotation of the driving piece 43 drives the driving hinge 42 to rotate anticlockwise, the rotation of the transmission hinge 42 drives the transmission rod 41 and the buckle 44 fixed on the transmission rod 41 to move horizontally along the direction away from the connecting rod 54, when moving for a certain distance, the buckle 44 is separated from the connecting rod 54, the connecting rod 54 rotates anticlockwise under the action of the torsion elastic force of the fourth elastic member 55, the rotation of the connecting rod 54 drives the transmission shaft 53 abutting against the connecting rod 54 and the lock catch 52 clamped in the clamping groove of the transmission shaft 53 to move leftwards, when moving for a certain distance, the lock catch 52 is completely removed from the clamping groove 310 of the reset key 31, the reset key 31 is pushed by the elastic force of the first elastic member 32 to move upwards, the tension of the first elastic member 32 is lost after the lock catch 52 is separated from the clamping groove 310 of the reset key 31, the cross arm 51 moves downwards under the elastic force of the conductive sheet 12, and the movable contact on the conductive sheet 12 is rapidly separated from the fixed contact on the PCB 11 to complete the breaking of the whole circuit.
B. when the reset key 31 moves upward, the second pushing inclined surface 315 pushes the indicator piece 61 to move horizontally away from the reset key 31, so that the black block on the indicator piece 61 is displayed in the indicator window of the cover plate 60, and the whole line is broken.
The foregoing is only a preferred embodiment of the present invention, and all technical solutions for achieving the object of the present invention by substantially the same means are within the scope of the present invention.
Claims (8)
1. The utility model provides a be independent with supply voltage earth leakage protection actuating mechanism, its characterized in that includes base (1) and mutual-inductor (2) that set up side by side, be equipped with on base (1) each other contact and electrically connect PCB board (11) and conducting strip (12), PCB board (11) are established ties through the power of conducting strip (12) and external electrical apparatus, be equipped with on base (1) and be used for driving the elastic switch mechanism of conducting strip (12) contact or break away from PCB board (11), still be equipped with on base (1) with the drive mechanism of switch mechanism cooperation in order to lock switch mechanism, still be equipped with on the base with electromagnetic release (14) that are connected with mutual-inductor (2) electricity, the output of electromagnetic release (14) with drive mechanism is connected, mutual-inductor (2) are close to PCB board (11), and when external electrical apparatus is leaked, the interior current of PCB board (11) increases and makes corresponding inductive current produced in mutual-inductor (2), and inductive current drives electromagnetic release (14) output of electromagnetic release (14) and drives out the drive mechanism and break away from switch mechanism and drive switch mechanism (141) and resume with outside electrical apparatus (12) with the elasticity drive mechanism, the base (1) is also provided with a reset device for driving the conductive sheet (12) to be in contact with the PCB (11) in a restoration way;
The switch mechanism comprises a cross arm (51) connected with the conducting strip (12), the cross arm (51) and the conducting strip (12) are both positioned below the PCB (11), the cross arm (51) is provided with a vertical first jack (511), the reset device comprises a reset key (31) and a first elastic piece (32) for driving the reset key (31) to move upwards, the reset key (31) is provided with a rod-shaped first pushing part (311), the first pushing part (311) is penetrated in the first jack (511), the left side part of the first pushing part (311) is provided with a clamping groove (310), the side wall of the first jack (511) is provided with a second jack (512) opposite to the clamping groove (310), the switch mechanism also comprises a plug-in locking device penetrating in the second jack (512), the right end part of the plug-in locking device is inserted in the clamping groove (310) of the first pushing part (311), the switch mechanism also comprises a tail end (1) hinged on the base and a connecting rod (54) and is used for driving the connecting rod (54) to rotate anticlockwise, and the tail end (1) is in a way of the switch mechanism is in a way of being hinged with the first connecting rod (54) and is in a way of being connected with the connecting rod (54) in a anticlockwise mode, and the connecting rod (54) is in a anticlockwise state is connected with the connecting rod (54) is in a rotary mode, the connecting rod (54) is driven by the elastic force of the fourth elastic piece (55) to rotate anticlockwise, and then drives the mortise lock device to move leftwards and to be separated from the clamping groove (310), so that the conducting strip (12) moves downwards to be separated from the PCB (11) under the driving of the self elastic force or the gravity of the cross arm (51);
The mutual inductor (2) is a zero sequence mutual inductor.
2. The power supply voltage independent leakage protection actuating mechanism according to claim 1, wherein the mortise lock device comprises a transmission shaft (53) slidably arranged on the base (1) and a lock catch (52), a left end portion of the lock catch (52) is arranged at a right end portion of the transmission shaft (53) in a manner of being capable of moving up and down through a chute structure, and a tail end of the connecting rod (54) is abutted with a left end portion of the transmission shaft (53).
3. The leakage protection actuating mechanism independent of power supply voltage according to claim 1, wherein the transmission mechanism comprises a buckle (44) locked with the head end of the connecting rod (54), the buckle (44) is positioned on the right side of the connecting rod (54), the transmission mechanism further comprises a transmission rod (41) capable of sliding left and right along the base (1), the left end of the transmission rod (41) is connected with the right side part of the buckle (44), a second elastic piece (40) for driving the buckle (44) to reset leftwards is arranged between the base (1) and the transmission rod (41), the second elastic piece (40) is connected between the side wall of the right end base (1) of the transmission rod (41), the transmission mechanism further comprises a transmission piece 411 (43) hinged on the base (1) and a transmission hinge (42) hinged on the base (1), the output end (141) of the electromagnetic release (14) is abutted with the head end of the transmission piece (43) and can drive the transmission piece (43) to rotate, the tail end of the transmission piece (43) is abutted with the hinge (42) and can drive the hinge (42) on the left end of the transmission rod (42) to rotate, the output end (141) of the electromagnetic release (14) drives the transmission plate (43) to rotate when being ejected outwards, and then drives the transmission hinge (42) to rotate so as to push the transmission rod (41) rightwards, so that the buckle (44) moves rightwards and is separated from the connecting rod (54).
4. The power supply voltage independent leakage protection actuating mechanism according to claim 3, wherein the reset key (31) has a second pushing portion (312) for driving the electromagnetic release (14) to reset, the head end of the transmission piece (43) is located between the second pushing portion (312) and the output end (141) of the electromagnetic release (14), when the output end (141) of the electromagnetic release (14) is pushed outwards, the second elastic member (40) is pushed by the tail end of the transmission hinge (42) to elastically deform, the head end of the connecting rod (54) is located below the first pushing portion (311) and can be pushed by the first pushing portion (311) to rotate clockwise, the base (1) is provided with a third elastic member (50) for driving the latch device to be inserted into the clamping groove (310), and the elastic force of the third elastic member (50) is smaller than that of the fourth elastic member (55),
When the reset key (31) is pressed down, the first elastic piece (32) elastically deforms, the output end (141) of the electromagnetic release (14) is pushed by the second pushing part (312) to retract inwards so that the armature and the early iron of the electromagnetic release (14) are attracted, the second elastic piece (40) elastically restores and drives the buckle (44) to reset leftwards, the connecting rod (54) is pushed by the first pushing part (311) to rotate to be locked with the buckle (44), the fourth elastic piece (55) is pushed by the connecting rod (54) to elastically deform, the third elastic piece (50) elastically restores and drives the inserting locking device to be inserted into the clamping groove (310) so as to lock the reset key (31) and the cross arm (51), and when the reset key (31) is released, the reset key (31) is driven by the elastic force of the first elastic piece (32) to drive the cross arm (51) to move upwards so that the conductive piece (12) is contacted with the PCB (11).
5. The leakage protection actuating mechanism independent of power supply voltage according to claim 1, characterized in that a cover plate (60) fixed relative to the base (1) is arranged above the base (1), an indication sheet (61) capable of moving relative to the cover plate (60) is arranged on the cover plate (60), a line closing indication part is arranged on the indication sheet (61), an indication window (601) opposite to the line closing indication part is arranged on the cover plate (60), a first pushing inclined surface (610) is arranged at one end of the indication sheet (61), a second pushing inclined surface (315) attached to the first pushing inclined surface (610) is arranged at the side part of the reset key (31), and when the locking device is separated from the clamping groove (310) so that the conductive sheet (12) is separated from the PCB (11), the reset key (31) is driven by the elastic force of the first elastic piece (32) to move upwards, and then the indication sheet (61) is pushed by the second pushing inclined surface (315) so that the line closing indication part is staggered with the indication window (601).
6. The leakage protection actuating mechanism independent of power supply voltage according to claim 5, wherein the indicating piece (61) is further provided with a circuit opening indicating part, when the locking device is separated from the PCB (11) by the conductive piece (12) from the clamping groove (310), the indicating piece (61) moves to the position where the circuit opening indicating part is opposite to the indicating window (601) relative to the cover plate, a fifth elastic piece (62) for driving the indicating piece (61) to move is arranged between the indicating piece (61) and the cover plate (60), and when the reset key (31) is pressed down, the indicating piece (61) is driven by the elastic force of the fifth elastic piece (62) and moves to the position where the circuit closing indicating part is opposite to the indicating window (601) relative to the cover plate.
7. The leakage protection actuating mechanism irrelevant to power supply voltage according to claim 1, wherein a test seat (71) and two test contacts are arranged on the PCB (11), a test needle (72) located above the test contacts is movably arranged on the test seat (71), a sixth elastic piece (73) for driving the test needle (72) to reset upwards is further arranged between the test needle (72) and the PCB (11), and the two test contacts can be electrically connected to enable the PCB (11) to be short-circuited when the test needle (72) moves downwards.
8. The power supply voltage independent earth leakage protection actuation mechanism of claim 7, wherein the top of the test pin (72) is provided with a test key (74).
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| CN201810468156.0A CN108417460B (en) | 2018-05-16 | 2018-05-16 | Leakage protection action mechanism irrelevant to power supply voltage |
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| CN201810468156.0A CN108417460B (en) | 2018-05-16 | 2018-05-16 | Leakage protection action mechanism irrelevant to power supply voltage |
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| CN108417460A CN108417460A (en) | 2018-08-17 |
| CN108417460B true CN108417460B (en) | 2024-05-14 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110931315A (en) * | 2019-12-03 | 2020-03-27 | 中山市开普电器有限公司 | Movable shell structure for electromagnetic leakage protector |
| CN110896016A (en) * | 2019-12-03 | 2020-03-20 | 中山市开普电器有限公司 | Electromagnetic leakage protector |
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| CN201868356U (en) * | 2010-12-05 | 2011-06-15 | 中山市开普电器有限公司 | Leakage protection device |
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| CN208873687U (en) * | 2018-05-16 | 2019-05-17 | 中山市开普电器有限公司 | A kind of earth leakage protective actuating mechanism unrelated with supply voltage |
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| CN201868356U (en) * | 2010-12-05 | 2011-06-15 | 中山市开普电器有限公司 | Leakage protection device |
| CN201893302U (en) * | 2010-12-23 | 2011-07-06 | 厦门振泰成科技有限公司 | Switch protection tripping device |
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| CN108417460A (en) | 2018-08-17 |
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