CN211980540U

CN211980540U - Leakage protection switch

Info

Publication number: CN211980540U
Application number: CN202021090054.9U
Authority: CN
Inventors: 王卫青; 文杰
Original assignee: Zhejiang Xia Xing Electronic Technology Ltd
Current assignee: Zhejiang Xia Xing Electronic Technology Ltd
Priority date: 2020-06-12
Filing date: 2020-06-12
Publication date: 2020-11-20
Anticipated expiration: 2030-06-12

Abstract

The utility model relates to an earth leakage protection switch, which comprises a bottom support, a circuit board and a button, the electromagnetic tripping mechanism comprises a support, wherein the support is movably connected to a bottom support and arranged below a circuit board, a movable contact is arranged on the top surface of the support, the circuit board forms a stationary contact right facing the movable contact, a linkage piece is connected to the electromagnetic tripping mechanism and connected with the support, a section of button downwards forms a connecting column which sequentially penetrates through the circuit board, the support and the linkage piece, a first elastic piece and a second elastic piece are sleeved on the connecting column, the first elastic piece is connected between the button and the circuit board, the second elastic piece is connected between the circuit board and the support, a through hole matched with the cross section of the connecting column is formed in the linkage piece, a first groove and a second groove are formed in two sides of the lower end of the connecting column respectively, and the linkage piece can be connected in the first groove or the second groove along with the. The leakage protection switch has the advantages of strong universality, compact structure, small volume and stable work.

Description

Leakage protection switch

Technical Field

The utility model relates to a low-voltage apparatus field especially relates to a leakage protection switch.

Background

In order to prevent accidents caused by electric leakage, an electric leakage protection function is often added on the protection switch. The current leakage protection switch is usually realized by a support, a circuit board, a reset button, a reset spring, a driving mechanism, a trip coil and a movable frame, when the leakage current occurs in the circuit, the circuit board receives the leakage signal of the circuit and enables the trip coil to be electrified, so that a movable iron core is driven to act, the movable frame is reset, and simultaneously, a movable contact and a static contact are separated, so that the circuit is in a breaking state. The static contact of the leakage protection switch is arranged on the support, the movable contact is arranged on the movable frame, and in order to enable the static contact and the movable contact to achieve opening and closing actions, the leakage protection switch needs to be abducted structurally, so that the integral volume of the leakage protection switch is directly large.

The leakage protection switch has two working modes, one mode is that a tripping coil is not electrified under the working condition of the switch, and when leakage current occurs, the tripping coil is electrified to drive a movable iron core to act so as to separate movable and static contacts, so that the leakage protection switch is called as a passive structure leakage protection switch; the other is the leakage protection switch with an active structure, wherein a tripping coil is electrified under the working condition of the switch, and when leakage current occurs, the tripping coil is electrified to drive a movable iron core to act, so that movable and static contacts are separated. Chinese patent publication No. CN107221787A discloses an earth leakage protection device, which comprises a support, a moving frame and a driving device, wherein the support is provided with a stationary contact, the moving frame is provided with a moving contact, and the moving frame is connected with the support through an elastic connecting piece and arranged in a swinging manner; the driving device drives the movable frame to move to realize the jointing and the separation of the movable contact and the static contact; wherein, also include the mechanical indicating structure; the mechanical indicating structure comprises an indicating piece and a connecting piece, wherein the indicating piece can rotate relative to the bracket; the surface of the indicating piece is provided with a first indicating mark and a second indicating mark, wherein one of the first indicating mark and the second indicating mark represents the state of the movable contact and the static contact, and the other one represents the state of the movable contact and the static contact which are separated; one end of the connecting piece is connected with the moving frame, the other end of the connecting piece is in linkage with the indicating piece, the moving frame swings to drive the indicating piece to rotate, and the indicating piece is driven by the moving frame to rotate to the corresponding mark. Although the above patent discloses passive and active leakage protection indicating devices, the two leakage protection indicating devices have different structures, that is, the passive and active leakage protection indicating devices cannot adopt a product structure at the same time, and manufacturers need to have a certain inventory for both the two leakage protection switches, and have a certain inventory pressure; and above-mentioned patent forms the joint cooperation through the block portion of shell fragment and the colluding portion that moves the frame, realizes moving, the laminating of stationary contact, and the condition of colluding takes place easily for such structure, and the earth leakage protection switch can abnormal disconnection under the condition that does not take place leakage current promptly.

Disclosure of Invention

In view of the above, the present invention provides a passive and active general leakage protection switch with small size, compact structure and stable and reliable mechanism connection, which solves the above technical drawbacks.

In order to achieve the above object, the present invention adopts such a leakage protection switch, which comprises a base, a circuit board disposed on the base, a button disposed on the circuit board, and an electromagnetic tripping mechanism disposed in the base and electrically connected with the circuit board, wherein the base is movably connected with a bracket disposed below the circuit board, the top surface of the bracket is provided with a movable contact, the circuit board forms a stationary contact with the movable contact, the electromagnetic tripping mechanism is connected with a linkage piece, the linkage piece is connected with the bracket, the button is formed downwards to form a section of connecting column which sequentially penetrates through the circuit board, the bracket and the linkage piece, the connecting column is sleeved with a first elastic member and a second elastic member, the elastic coefficient of the first elastic member is greater than that of the second elastic member, the first elastic member is connected between the button and the circuit board, and the second elastic member is connected between the circuit board and the bracket, the linkage piece is provided with a through hole matched with the section of the connecting column, a first groove and a second groove are formed on two sides of the lower end of the connecting column respectively, and the linkage piece can be connected in the first groove or the second groove along with the action of the electromagnetic tripping mechanism.

The leakage protection switch has the advantages that the static contact is arranged on the circuit board, the movable contact and the static contact are attached through the connecting column on the button to drive the support and the linkage piece, the support is arranged between the bottom support and the circuit board, the internal space is greatly utilized, the internal structure of the leakage protection switch is more compact, and the switch size is reduced. The utility model discloses leakage protection switch realizes that passive and the general working method of active structure as follows: when the passive leakage protection switch works, the electromagnetic tripping mechanism is not electrified, the linkage piece keeps an outward acting force on the connecting column under the action of an iron core spring in the electromagnetic tripping mechanism, the button is pressed down, the linkage piece is connected in the first groove, under the condition that the elastic coefficient of the first elastic part is larger than that of the second elastic part, the connecting column drives the bracket and the linkage sheet to move upwards, the first elastic part and the second elastic part are compressed, the movable contact is attached to the fixed contact, when leakage current occurs, the circuit board drives the electromagnetic tripping mechanism to be electrified to compress the iron core spring, the electromagnetic tripping mechanism generates an inward acting force on the linkage piece to separate the linkage piece from the first groove, the compressed first elastic piece and the compressed second elastic piece both reset under the action of respective elastic potential energy, and the movable contact is separated from the fixed contact; when the active leakage protection switch works, the electromagnetic tripping mechanism is kept electrified, the linkage piece keeps an inward acting force on the connecting column under the action of an iron core spring in the electromagnetic tripping mechanism, the button is pressed, the linkage piece is connected in the second groove, under the condition that the elastic coefficient of the first elastic part is larger than that of the second elastic part, the connecting column drives the bracket and the linkage sheet to move upwards, the first elastic part and the second elastic part are compressed, the movable contact is attached to the fixed contact, when leakage current occurs, the circuit board drives the electromagnetic tripping mechanism to lose power to reset the iron core spring, the electromagnetic tripping mechanism generates an outward action on the linkage piece to separate the linkage piece from the second groove, the compressed first elastic piece and the compressed second elastic piece both reset the button and the support under the action of respective elastic potential energy, and the movable contact is separated from the stationary contact. The utility model discloses an earth leakage protection switch is through setting up the spliced pole with the integrative action of button on the button, and first recess and second recess on the spliced pole can be applicable to active and passive formula simultaneously with the combination formation linkage of electromagnetic tripping mechanism and linkage piece respectively, such earth leakage protection switch structure, and the commonality is strong, can reduce certain stock pressure for the producer, and such earth leakage protection switch has the reliable and stable advantage of action moreover.

The utility model discloses it is integrated into one piece and is "7 style of calligraphy" to set up to the linkage piece, including breakthrough portion and connecting portion, the through-hole sets up in the breakthrough portion, form the spread groove on the connecting portion, electromagnetic tripping mechanism includes quiet iron core, moves the iron core, connects at quiet iron core and moves the iron core spring between the iron core, quiet iron core is fixed on the collet, it leans on the one end of spliced pole to form the separation blade to move the iron core, the separation blade is connected in the spread groove.

Above-mentioned spread groove makes the linkage piece can reciprocate in the vertical direction along with the spliced pole when moving the iron core and connecting, and the separation blade of moving the iron core is connected and is made the linkage piece to control to move about the horizontal direction in the spread groove.

The utility model discloses further set up to the middle part of support and form the trompil, the trompil includes trompil section and lower trompil section, first elastic component is connected in last trompil section, the lower extreme of support forms the cross slot that runs through the lower trompil section, breakthrough portion swing joint is in the cross slot.

Above-mentioned last trompil section can let first elastic component connect steadily between circuit board and support, and the cross slot is used for being connected of linkage piece and support, and after pressing the button, the spliced pole can drive linkage piece and support and upwards move together.

The utility model discloses further set up to first recess and second recess symmetry and set up on the spliced pole, and the height of first recess to spliced pole bottom equals with the height of second recess to the spliced pole bottom.

The first groove and the second groove are arranged at the same height so as to avoid the following two conditions: 1. when the passive leakage protection switch performs the leakage protection action, the linkage sheet is clamped into the second groove when moving inwards; 2. when the active leakage protection switch performs leakage protection action, the linkage sheet is clamped into the first groove when moving outwards.

The utility model discloses further set up to the both sides formation guide block of support, the both sides formation guide way of collet, the support passes through the cooperation of guide block and guide way and connects on the collet.

The matching structure of the guide block and the guide groove is used for limiting the stroke of the support when the support moves upwards, so that the support is ensured to move in the vertical direction, and the stability of the action of the leakage protection switch is improved.

The utility model discloses further set up the movable contact groove that forms the symmetry to the support, be provided with the contact plate in the movable contact groove, the movable contact sets up on the contact plate.

The structure of the bracket is convenient for the installation and the positioning of the movable contact.

This practicality further sets up to the upper end of support and forms a plurality of barbs, the circuit board forms the joint cooperation with the barb.

The structure facilitates the assembly and positioning installation of the circuit board, and particularly carries out the selective installation of the passive circuit board or the active circuit board aiming at the passive leakage protection switch and the active leakage protection switch.

This practicality further sets up to first elastic component and second elastic component and is the spring.

Drawings

Fig. 1 is a perspective view of an embodiment of the present invention.

Fig. 2 is a perspective view of the embodiment of the present invention with the bottom support removed.

Fig. 3 is an exploded view of an embodiment of the present invention.

Fig. 4 is an exploded view of the embodiment of the present invention with the bottom support and the circuit board removed.

Fig. 5 is a cross-sectional view of a bracket according to an embodiment of the present invention.

Fig. 6 is a cross-sectional view of the earth leakage protection switch according to the embodiment of the present invention in the state of separating the movable contact from the stationary contact.

Fig. 7 is a cross-sectional view of the passive leakage protection switch according to the embodiment of the present invention in the state of the movable and stationary contacts being attached.

Fig. 8 is a cross-sectional view of the active earth leakage protection switch according to the embodiment of the present invention.

Detailed Description

As shown in fig. 1-5, the utility model relates to a leakage protection switch, including collet 1, circuit board 2 arranged on collet 1, button 3 arranged on circuit board 2, electromagnetic tripping mechanism 4 arranged in collet 1 and electrically connected with circuit board 2, a plurality of barbs 12 are formed at the upper end of collet 1, circuit board 2 and barbs 12 form a snap fit, electromagnetic tripping mechanism 4 includes static iron core 41, movable iron core 42, iron core spring 43 connected between static iron core 41 and movable iron core 42, static iron core 41 is fixed on collet 1, movable iron core 42 forms separation blade 421 by one end of connecting column 3, bracket 5 is movably connected on collet 1, guide blocks 54 are formed at two sides of bracket 5, guide grooves 11 are formed at two sides of collet 1, bracket 5 is connected on collet 1 through the cooperation of guide blocks 54 and guide grooves 11, the support 5 is arranged below the circuit board 2, two sides of the upper end of the support 5 form symmetrical movable contact grooves 55, a contact plate 56 is arranged in the movable contact groove 55, a movable contact 561 is arranged on the contact plate 56, an open hole is formed in the middle of the support 5 and comprises an upper open hole section 51 and a lower open hole section 52, a transverse groove 53 penetrating through the lower open hole section 52 is formed at the lower end of the support 5, the circuit board 2 just forms a fixed contact 21 at the position of the movable contact 561, a linkage piece 6 is connected onto the electromagnetic tripping mechanism 4, the linkage piece 6 is integrally formed and is in a 7 shape and comprises a penetrating part 61 and a connecting part 62, a through hole 611 matched with the section of the connecting column 31 is formed on the penetrating part 61, a connecting groove 621 is formed on the connecting part 62, the blocking piece 421 is connected into the connecting groove 621, the penetrating part 61 is movably connected into the transverse groove 53, so that the linkage piece 6 is connected with the support 5, the button 3 forms one section spliced pole 31 that runs through circuit board 2, support 5, through-hole 611 in proper order downwards, the cover is equipped with first spring 32 and second spring 33 on the spliced pole 31, the elastic coefficient of first spring 32 is greater than the elastic coefficient of second spring 33, first spring 32 is connected between button 3 and circuit board 2 and is connected in last trompil section 51, and second spring 33 is connected between circuit board 2 and support 5, the both sides of spliced pole 31 lower extreme form first recess 311 and second recess 312 respectively, first recess 311 and second recess 312 symmetry set up on spliced pole 31, and the height of first recess 311 to spliced pole 31 bottom equals with the height of second recess 312 to spliced pole 31 bottom, linkage piece 6 can be connected in first recess 311 or second recess 312 along with the action of electromagnetic tripping mechanism 4.

According to the above embodiment, the utility model discloses earth leakage protection switch's structure can regard as passive and two kinds of active switches to use simultaneously, only need with the circuit board change can, two kinds of switches specifically use the theory of operation as follows:

as shown in fig. 6 and 7, when the passive earth leakage protection switch works, the electromagnetic tripping mechanism is not powered on, the linkage piece keeps an outward acting force on the connection column under the action of the iron core spring in the electromagnetic tripping mechanism, after the button is pressed, the linkage piece is connected in the first groove, under the condition that the elastic coefficient of the first elastic piece is greater than that of the second elastic piece, the connection column drives the bracket and the linkage piece to move upwards, the first elastic piece and the second elastic piece are both compressed, the movable contact is attached to the stationary contact (as shown in fig. 7), when an electric leakage current occurs, the circuit board drives the electromagnetic tripping mechanism to be powered on to compress the iron core spring, the electromagnetic tripping mechanism generates an inward acting force on the linkage piece to separate the linkage piece from the first groove, and the compressed first elastic piece and the compressed second elastic piece are under respective elastic potential energies, both the button and the holder are reset and the movable contact is separated from the stationary contact (as shown in fig. 6).

As shown in fig. 6 and 8, when the active leakage protection switch is operated, the electromagnetic trip mechanism is powered on, the linkage piece keeps an inward acting force on the connection column under the action of the iron core spring in the electromagnetic trip mechanism, after the button is pressed, the linkage piece is connected in the second groove, under the condition that the elastic coefficient of the first elastic piece is greater than that of the second elastic piece, the connection column drives the bracket and the linkage piece to move upwards, the first elastic piece and the second elastic piece are both compressed, the movable contact is attached to the stationary contact (as shown in fig. 8), when leakage current occurs, the circuit board drives the electromagnetic trip mechanism to lose power to reset the iron core spring, the electromagnetic trip mechanism generates an outward action on the linkage piece to separate the linkage piece from the second groove, and the compressed first elastic piece and the compressed second elastic piece are under respective elastic potential energies, both the button and the holder are reset and the movable contact is separated from the stationary contact (as shown in fig. 6).

According to the analysis of above-mentioned passive form and active earth leakage protection switch work, the utility model discloses earth leakage protection switch's structure can be applicable to the earth leakage protection switch under two kinds of mode simultaneously, and the commonality of switch is strong, can reduce certain stock pressure for the producer, and the joint cooperation of linkage piece and recess makes earth leakage protection switch action reliable and stable moreover, can not take place the malfunction.

In addition to the above embodiments, the present invention can also have other embodiments, such as the types of the elastic members, the simple transformation of the linkage plate structure, etc., and those skilled in the art can make various corresponding changes according to the present invention without departing from the spirit and the essential technical solutions of the present invention, but these corresponding changes should fall into the scope of the appended claims of the present invention.

Claims

1. The utility model provides a leakage protection switch, includes the collet, sets up circuit board on the collet, sets up button on the circuit board, sets up in the collet and the electromagnetism tripping device who is connected with the circuit board electricity, its characterized in that: the bottom support is movably connected with a support, the support is arranged below the circuit board, the top surface of the support is provided with a movable contact, the circuit board forms a stationary contact at the position opposite to the movable contact, the electromagnetic tripping mechanism is connected with a linkage piece which is connected with the bracket, the button is downwards formed into a section of connecting column which sequentially penetrates through the circuit board, the bracket and the linkage piece, the connecting column is sleeved with a first elastic element and a second elastic element, the elastic coefficient of the first elastic element is greater than that of the second elastic element, the first elastic piece is connected between the button and the circuit board, the second elastic piece is connected between the circuit board and the bracket, a through hole matched with the section of the connecting column is formed on the linkage piece, a first groove and a second groove are respectively formed on two sides of the lower end of the connecting column, the linkage piece can be connected in the first groove or the second groove along with the action of the electromagnetic tripping mechanism.

2. The earth leakage protection switch of claim 1, wherein: linkage piece is integrated into one piece and is "7 style of calligraphy", including penetrating portion and connecting portion, the through-hole sets up in penetrating portion, form the spread groove on the connecting portion, electromagnetism tripping device includes quiet iron core, moves the iron core, connects at quiet iron core and moves the iron core spring between the iron core, quiet iron core is fixed on the collet, it leans on the one end of spliced pole to move the iron core to form the separation blade, the separation blade is connected in the spread groove, linkage piece forms the linkage cooperation with moving the iron core.

3. A residual-current circuit breaker according to claim 2, characterized in that: the middle part of support forms the trompil, the trompil includes last trompil section and lower trompil section, first elastic component is connected in last trompil section, the lower extreme of support forms the cross slot that runs through lower trompil section, penetrating part swing joint is in the cross slot.

4. A residual current circuit breaker as claimed in claim 1, 2 or 3, characterized in that: the first groove and the second groove are symmetrically arranged on the connecting column, and the height from the first groove to the bottom of the connecting column is equal to the height from the second groove to the bottom of the connecting column.

5. A residual current circuit breaker as claimed in claim 1, 2 or 3, characterized in that: the guide block is formed on two sides of the support, the guide groove is formed on two sides of the bottom support, and the support is connected to the bottom support through the cooperation of the guide block and the guide groove.

6. A residual current circuit breaker as claimed in claim 1, 2 or 3, characterized in that: the movable contact device comprises a support and is characterized in that symmetrical movable contact grooves are formed in the support, contact plates are arranged in the movable contact grooves, and the movable contacts are arranged on the contact plates.

7. A residual current circuit breaker as claimed in claim 1, 2 or 3, characterized in that: the upper end of collet forms a plurality of barbs, the circuit board forms the joint cooperation with the barb.

8. A residual current circuit breaker as claimed in claim 1, 2 or 3, characterized in that: the first elastic piece and the second elastic piece are both springs.