CN106961055B

CN106961055B - Leakage protection plug with ground wire on-off device

Info

Publication number: CN106961055B
Application number: CN201710294890.5A
Authority: CN
Inventors: 张建民; 史泽华
Original assignee: SHENZHEN LONGWAY TECHNOLOGY CO LTD
Current assignee: SHENZHEN LONGWAY TECHNOLOGY CO LTD
Priority date: 2017-04-28
Filing date: 2017-04-28
Publication date: 2022-11-22
Anticipated expiration: 2037-04-28
Also published as: CN106961055A

Abstract

The utility model provides a be equipped with ground wire on-off device earth leakage protection plug, ground wire on-off device includes rotatory wane, 3 rd spring, 4 th spring, ground wire shell fragment, and rotatory wane makes luffing motion through the pivot and establishes the constant head tank on the fixed plate and be connected. The ground wire on-off device is combined with the pressure lever, the reset push rod and the No. 2 spring, and can generate a reinforcement for the breaking of the moving contact and the static contact of the ground wire, thereby greatly improving the breaking capacity of the ground wire contact.

Description

Leakage protection plug with ground wire on-off device

Technical Field

The invention relates to the technical field of power utilization safety protection, in particular to a leakage protection plug with a ground wire on-off device.

Background

The existing leakage protection plug is generally characterized in that when a contact is disconnected, a pressure rod is directly pushed to move downwards by the elasticity of an L-pole elastic sheet and an N-pole elastic sheet, and a ground wire elastic sheet is pulled or pushed to disconnect the moving contact and the static contact of the ground wire downwards, the L-pole elastic sheet, the N-pole elastic sheet and the ground wire elastic sheet are made of copper materials with good electric conductivity, and the elasticity and the fatigue strength of the elastic sheets cannot meet the requirement on the service life of frequent disconnection due to the limitations of material selection and production cost. Therefore, the L-pole elastic sheet and the N-pole elastic sheet not only provide self breaking elastic force, but also support and enhance the elastic force of the ground wire elastic sheet to break the movable contact and the static contact of the ground wire, and the elastic sheets are easy to deform after being used for certain breaking times, so that the breaking distance cannot reach the safe distance, and serious potential safety hazards can be generated.

Disclosure of Invention

In order to overcome the technical problems, the invention provides the leakage protection plug provided with the ground wire on-off device, which can further improve the breaking capacity and the service life of the ground wire contact while ensuring that the ground wire contact is firstly connected with the L-pole contact and the N-pole contact when in connection and is later disconnected with the L-pole contact and the N-pole contact when in disconnection, so that the ground wire contact is safer and more reliable, and the electricity utilization safety of an electric appliance and a user is ensured.

The technical solution proposed by the present invention is as follows:

a leakage protection plug with a ground wire on-off device comprises an upper shell, a lower shell, a fixing plate and an electromagnetic tripping and locking device, wherein the electromagnetic tripping and locking device comprises a driving electromagnetic coil, a coil framework, a 1 st spring, an armature, a tripping locking piece, a pressure rod, a reset push rod, a 2 nd spring, an L-pole moving contact, an L-pole static contact, an N-pole moving contact, an N-pole static contact, a ground wire moving contact, a ground wire static contact and a coil base, an electromagnet consisting of the driving electromagnetic coil, the armature and the 1 st spring is arranged in the coil base, a circuit board is embedded at the upper end part of the coil base, an L-pole elastic sheet and an N-pole elastic sheet are respectively arranged at two sides below the circuit board, the lower end part of the coil base is supported on the fixing plate, a downward L-pole copper pin, an N-pole copper pin and a ground wire copper pin are arranged on the fixing plate, and a 2 nd spring is arranged between the reset push rod and the circuit board, be equipped with the recess on the push rod that resets, with jump hasp piece activity buckle, the push rod that resets inserts the depression bar and cup joints as the activity, still is equipped with ground wire on-off device, ground wire on-off device comprises rotatory wane, 3 rd spring, 4 th spring, ground wire shell fragment, be equipped with 2 nd curved surface above the rotatory wane high-end, be equipped with 3 rd curved surface above the rotatory wane low side, ground wire shell fragment one end is fixed on the fixed plate, with the corresponding ground wire shell fragment bottom of 3 rd curved surface of rotatory wane is equipped with the 4 th curved surface, rotatory wane through locate its middle part the pivot with constant head tank on the fixed plate is made the luffing motion and is connected, is equipped with the 3 rd spring below the rotatory wane high-end between the fixed plate, and the 3 rd curved surface of rotatory wane high-end is connected with the 1 st curved surface contact of establishing tip under the depression bar, is equipped with the 4 th spring between line way and the depression bar.

When the L pole moving contact and the L pole static contact and the N pole moving contact and the N pole static contact are closed and connected, a distance with a gap of H exists between the 3 rd curved surface and the 4 th curved surface, and H = 0.2-2.0 mm. When the L pole moving contact and the L pole static contact and the N pole moving contact and the N pole static contact are disconnected instantaneously, a distance with a gap of H is also formed between the 3 rd curved surface and the 4 th curved surface, and H = 0.2-2.0 mm.

Compared with the prior art, the invention has the following remarkable effects:

(1) The ground wire on-off device of the leakage protection plug adopts the rotating warped plate movably supported on the fixed plate, organically combines the original electromagnetic tripping and locking device, and generates a reinforcement effect on the dynamic and static contacts of the broken ground wire together with the 4 th spring arranged between the circuit board and the pressure lever, thereby greatly improving the breaking reliability of the dynamic and static contacts of the ground wire and prolonging the service life of the product.

(2) During normal work, the ground wire contact is switched on before the L-pole contact and the N-pole contact; the disconnection of the ground contact is later than the disconnection of the L-pole contact and the N-pole contact, so that the electricity safety of electric appliances and personnel is ensured.

Drawings

Fig. 1 is an exploded perspective view of an embodiment of an earth leakage protection plug with a ground line on-off device according to the present invention.

Fig. 2 is a front view of the earth leakage protection plug of fig. 1.

Fig. 3 isbase:Sub>A cross-sectional viewbase:Sub>A-base:Sub>A of fig. 2, with the contacts in an on state.

Fig. 4 isbase:Sub>A cross-sectional viewbase:Sub>A-base:Sub>A of fig. 2 with the contacts in an open state.

Fig. 5 is a left side view of fig. 2 with parts of the upper case, the lower case, and the like removed.

Fig. 6 is a front view of fig. 2 with parts such as the upper case, the lower case, the circuit board, etc., removed.

Fig. 7 is a sectional view B-B of fig. 6.

Fig. 8 is a cross-sectional view C-C of fig. 6.

In the figure, 1, an upper shell, 2, a reset push rod, 2-1, a groove on the reset push rod, 3, a 2 nd spring, 4, a circuit board, 5.N pole elastic sheet, 6.N pole movable contact, 6-1.N pole fixed contact, 7, a press rod, 7-1, a 1 st curved surface at the lower end part of the press rod, 8, a 3 rd spring, 9.N pole copper pin, 10, a lower shell, 11, a fixed plate, 11-1, a positioning groove on the fixed plate, 12.L pole copper pin, 13, a ground wire copper pin, 14, a ground wire elastic sheet, 14-1, the 4 th curved surface at the bottom of the ground wire elastic sheet, 15, the rotating rocker, 15-1, the 2 nd curved surface above the high end of the rotating rocker, 15-2 the rotating shaft of the rotating rocker, 15-3, the 3 rd curved surface above the low end of the rotating rocker, 16, the ground wire moving contact, 16-1, the ground wire fixed contact, 17, the coil seat, 18, the jump lock catch sheet, 19, the driving electromagnetic coil, 20, the armature, 21, the 1 st spring, 22, the coil framework, 23, the 4 th spring, the 24.L pole moving contact, 24-1.L pole fixed contact and 25.L pole elastic sheet.

Detailed Description

The present invention is further illustrated by the following examples. The embodiments described herein are merely illustrative and are not intended to limit the present invention.

Referring to fig. 1 to 8, an earth leakage protection plug with a ground wire on-off device comprises an upper shell 1, a lower shell 10, a fixing plate 11, an electromagnetic trip and locking device, wherein the electromagnetic trip and locking device comprises a driving electromagnetic coil 19, a coil framework 22, a 1 st spring 21, an armature 20, a trip locking piece 18, a pressure bar 7, a reset push rod 2, a 2 nd spring 3, an L-pole moving contact 24-1, an L-pole static contact 24-1, an N-pole moving contact 6, an N-pole static contact 6-1, a ground wire moving contact 16, a ground wire static contact 16-1 and a coil base 17, an electromagnet consisting of the driving electromagnetic coil 19, the armature 20 and the 1 st spring 21 is arranged in the coil base 17, a circuit board 4 is embedded in the upper end of the coil base 17, an L-pole elastic sheet 25 and an N-pole elastic sheet 5 are respectively arranged on two sides below the circuit board 4, the lower end of the coil base 17 is supported on the fixing plate 11, a downward L-pole copper pin 12, an N-pole copper pin 9 and a ground wire copper pin 13 are arranged on a fixed plate 11, a 2 nd spring 3 is arranged between a reset push rod 2 and a circuit board 4, a groove 2-1 is arranged on the reset push rod 2 and movably buckled with a jump lock catch piece 18, the reset push rod 2 is inserted into a pressure rod 7 and movably sleeved, a ground wire on-off device is also arranged, the ground wire on-off device consists of a rotary rocker 15, a 3 rd spring 8, a 4 th spring 23 and a ground wire elastic sheet 14, a 2 nd curved surface 15-1 is arranged on the high end of the rotary rocker 15, a 3 rd curved surface 15-3 is arranged on the low end of the rotary rocker 15, one end of the ground wire elastic sheet 14 is fixed on the fixed plate 11, a 4 th curved surface 14-1 is arranged at the bottom of the ground wire elastic sheet 14 corresponding to the 3 rd curved surface 15-3 of the rotary rocker 15, the rotary rocker 15 and a positioning groove 11-1 on the fixed plate are arranged up and down through a middle part 15-2 of a rotating shaft arranged on the rotary rocker 15 The rocker is connected in a swinging way, a 3 rd spring 8 is arranged between the lower surface of the high end of the rocker 15 and the fixed plate 11, a 3 rd curved surface 15-3 of the high end of the rocker 15 is in contact connection with a 1 st curved surface 7-1 arranged at the lower end part of the compression bar, a 4 th spring 23 is arranged between the circuit board 4 and the compression bar 7, and the 4 th spring 23 is sleeved on the reset push rod 2.

Thus, when the ground contact is disconnected, the pressure rod 7 can obtain enough motion to move downwards to press the rotating rocker 15 to swing in the clockwise direction. When the L-pole moving contact 24 and the L-pole fixed contact 24-1 and the N-pole moving contact 6 and the N-pole fixed contact 6-1 are closed and switched on, a distance with a gap H exists between the 3 rd curved surface and the 4 th curved surface, and H = 0.2-2.0 mm. When the L-pole moving contact 24 and the L-pole fixed contact 24-1 and the N-pole moving contact 6 and the N-pole fixed contact 6-1 are disconnected, a distance with a gap of H is further formed between the 3 rd curved surface and the 4 th curved surface, and H = 0.2-2.0 mm.

When the reset push rod 2 is pressed by a hand to enable the 2 nd spring 3 to compress and move downwards, when the groove 2-1 on the reset push rod 2 reaches the position corresponding to the jump lock catch piece 18, the armature 20 pushes the jump lock catch piece 18 forwards to enter the groove 2-1 on the reset push rod 2 under the elastic force of the 1 st spring 21, so that the lock catch is clamped, and the reset push rod 2, the pressure rod 7 and the jump lock catch piece 18 form a moving whole. When the hand is released, the reset push rod 2 moves upwards under the action of the elastic force of the 2 nd spring 3, and drives the L pole elastic piece 25 provided with the L pole moving contact 24 and the N pole elastic piece 5 provided with the N pole moving contact 6 to move towards the directions of the L pole static contact 24-1 and the N pole static contact 6-1 through the press rod 7 respectively, and finally the L pole moving contact 24 and the L pole static contact 24-1 are closed and communicated, and the N pole moving contact 6 and the N pole static contact 6-1 are closed and communicated. Meanwhile, before the L-pole moving contact 24 and the L-pole static contact 24-1 are closed and communicated, and the N-pole moving contact 6 and the N-pole static contact 6-1 are closed and communicated, while the reset push rod 2 drives the press rod 7 to move upwards, the 3 rd spring 8 arranged between the fixed plate 11 and the lower surface of the high end of the rotating wane 15 pushes the 2 nd curved surface 15-1 at the high end of the rotating wane 15 to be always in contact connection with the 1 st curved surface 7-1 at the lower end part of the press rod 7, and meanwhile, the rotating wane 15 swings anticlockwise around the positioning groove 11-1 of the fixed plate 11 through the rotating shaft 15-2, so that the ground wire elastic sheet 14 provided with the moving contact ground wire 16 moves towards the ground wire static contact 16-1 under the action of the self elastic force, and finally, the ground wire moving contact 16 and the ground wire static contact 16-1 are closed and communicated. After the rotating rocker 15 is closed and connected, the position structure ensures that a distance H is reserved between the 3 rd curved surface 15-3 at the lower end of the rotating rocker 15 and the 4 th curved surface 14-1 at the bottom of the ground wire shrapnel 14, and the distance H is selected to be 0.2 ∞2.0mm, after the ground wire moving contact 16 is connected and closed with the ground wire static contact 16-1, the L pole moving contact 24 and the N pole moving contact 6 also need to move upwardsThe L-pole static contact 24-1 and the N-pole static contact 6-1 can be respectively switched on and off after a gap is within a distance of H, namely the switching-on and off of the linear contact are carried out before the switching-on and off of the L-pole contact and the N-pole contact when the L-pole static contact and the N-pole static contact are switched on and off, so that the aim of safe electricity utilization is fulfilled.

When the leakage occurs or the ground wire has fault current and reaches a set threshold value in use, the electromagnetic coil 19 is driven to work by electrifying, under the action of a magnetic field force, the armature 20 pulls the jump locking piece 18 backwards to separate the jump locking piece from the groove 2-1 on the reset push rod 2, at the moment, the reset push rod 2, the pressure rod 7 and the jump locking piece 18 are not a whole due to tripping, so that the reset push rod 2 independently moves upwards under the action of the 2 nd spring 3, and meanwhile, the L pole elastic piece 25 provided with the L pole moving contact 24 and the N pole elastic piece 5 provided with the N pole moving contact 6 drive the pressure rod 7 to move downwards under the action of the self elasticity of the elastic pieces and the elasticity of the 4 th spring 23, so that the L pole moving contact 24 and the N pole moving contact 6 are separated from the L pole static contact 24-1 and the N pole static contact 6-1 respectively to realize breaking. When the L-pole elastic piece 25 and the N-pole elastic piece 5 drive the pressure lever 7 to move downwards under the self elasticity and the push of the 4 th spring 23 to separate the L-pole contact and the N-pole contact, the 1 st curved surface 7-1 at the lower end of the pressure lever 7 presses the 2 nd curved surface 15-1 at the high end of the rotating rocker 15 downwards, so that the rotating rocker 15 swings clockwise around the positioning groove 11-1 of the fixing plate 11 through the rotating shaft 15-2, and after the 3 rd curved surface 15-3 at the lower end of the rotating rocker 15 swings upwards for a distance of H, the ground wire elastic piece 14 still swings upwards after contacting the 4 th curved surface 14-1 at the bottom of the ground wire elastic piece 14, so that the ground wire moving contact 16 and the ground wire static contact 16-1 are separated. When the L-pole moving contact 24 and the N-pole moving contact 6 are disconnected from the L-pole static contact 24-1 and the N-pole static contact 6-1, the rotating rocker 15 swings clockwise for a distance H to disconnect the ground line moving contact 16 and the ground line static contact 16-1. Therefore, the breaking of the L-pole contact and the breaking of the N-pole contact are guaranteed to be prior to the breaking of the ground wire contact, and the purpose of safe power utilization is achieved.

Since the principle structure of the leakage signal detection and driving of the electromagnetic coil and the control circuit on the circuit board of the leakage protection plug is known in the art, the detailed description is omitted here.

Claims

1. The utility model provides a leakage protection plug with ground wire on-off device, include epitheca, inferior valve, fixed plate, electromagnetic trip and locking device includes drive solenoid, coil skeleton, the 1 st spring, armature, jump the hasp piece, the depression bar, the push rod that resets, the 2 nd spring, L utmost point moving contact, L utmost point static contact, N utmost point moving contact, N utmost point static contact, the ground wire moving contact, the ground wire static contact, the coil base, be equipped with the electro-magnet that comprises drive solenoid, armature and the 1 st spring in the coil base, coil base upper end inlays and is equipped with the circuit board, both sides are equipped with L utmost point shell fragment, N utmost point shell fragment respectively below the circuit board, the tip supports on the fixed plate under the coil base, be equipped with decurrent L utmost point copper foot, N utmost point copper foot, ground wire copper foot on the fixed plate, be equipped with the 2 nd spring between reset push rod and the circuit board, be equipped with the recess on the push rod that resets with jump the hasp piece activity buckle, the push rod that resets and insert and do the activity cup joint, its characterized in that: the ground wire on-off device is also arranged and consists of a rotary wane, a 3 rd spring, a 4 th spring and a ground wire elastic sheet, wherein a 2 nd curved surface is arranged on the high end of the rotary wane, a 3 rd curved surface is arranged on the low end of the rotary wane, one end of the ground wire elastic sheet is fixed on the fixed plate, a 4 th curved surface is arranged at the bottom of the ground wire elastic sheet corresponding to the 3 rd curved surface of the rotary wane, the rotary wane is connected with the positioning groove on the fixed plate in an up-and-down swinging manner through a rotating shaft arranged in the middle of the rotary wane, the 3 rd spring is arranged between the lower surface of the high end of the rotary wane and the fixed plate, the 3 rd curved surface of the high end of the rotary wane is connected with the 1 st curved surface arranged at the lower end part of the compression rod in a contact manner, and the 4 th spring is arranged between the circuit board and the compression rod; when the L-pole moving contact and the L-pole static contact and the N-pole moving contact and the N-pole static contact are closed and communicated, a distance with a gap of H exists between the 3 rd curved surface and the 4 th curved surface, H = 0.2-2.0 mm, and the ground wire moving contact and the ground wire static contact are closed and communicated; when the L pole moving contact and the L pole static contact as well as the N pole moving contact and the N pole static contact are disconnected instantaneously, a distance H, H = 0.2-2.0 mm, still exists between the 3 rd curved surface and the 4 th curved surface, and the ground wire moving contact and the ground wire static contact are in a connected state.