CN212908376U

CN212908376U - Leakage protection socket

Info

Publication number: CN212908376U
Application number: CN202022105967.XU
Authority: CN
Inventors: 罗潇; 郭得道
Original assignee: Zhejiang Vostto Electric Co ltd
Current assignee: Zhejiang Vostto Electric Co ltd
Priority date: 2020-09-23
Filing date: 2020-09-23
Publication date: 2021-04-06
Anticipated expiration: 2030-09-23

Abstract

The utility model provides an earth leakage protection socket, it includes earth leakage protection device. The leakage protection device comprises an installation frame, a movable contact, a reset button and a tripping assembly. The mounting bracket is arranged on the bottom surface of the circuit board. The movable frame is connected to the mounting frame in a sliding manner through a movable frame return spring. One end of the moving contact is rotatably connected to the bottom surface of the circuit board, and the body part of the moving contact is linked with the movable frame. Reset button is fixed in the mounting bracket through reset spring, and reset button's actuating lever wears to penetrate socket panel and stretches into the adjustable shelf in, the side of actuating lever has a block groove, and the end of actuating lever has the spigot surface of slope. The tripping assembly comprises a tripping driving piece and a tripping piece, the tripping driving piece is connected to the mounting frame and the electric connection circuit board along the transverse elastic connection mode, the tripping piece comprises a connecting portion and a clamping portion, the connecting portion is connected to the tripping driving piece in a sliding mode, and the clamping portion is arranged on the movable frame and locked or tripped with the clamping groove.

Description

Leakage protection socket

Technical Field

The utility model relates to a socket, and in particular to earth leakage protection socket.

Background

A socket is a socket into which one or more circuit terminals are inserted, through which various terminals are inserted, and is a very common electrical component in daily life. With the continuous improvement of the living standard of people, the requirement on the safety of the socket is higher and higher. In order to prevent accidents caused by electric leakage, technicians add an electric leakage protection function on the switch or the socket so as to form an electric leakage protection switch or an electric leakage protection socket.

The existing socket with the leakage protection function and the leakage protection switch have the structure that a copper sheet with the thickness of 0.3mm-0.4mm is generally bent to form a moving contact, and the moving contact is broken by the elasticity of the copper sheet. The moving contact with the structure has the problem that the elasticity of the copper sheet is greatly reduced along with the increase of the using times. Furthermore, in order to keep the elasticity required by the breaking of the contact of the moving contact, the thickness of the copper sheet cannot be increased, and the temperature rise reaches a critical value after long-time use, so that the moving contact is always in a high-temperature working state, the material performance is seriously influenced, the electrical gap distance is greatly shortened, and huge potential safety hazards exist.

SUMMERY OF THE UTILITY MODEL

The utility model discloses an overcome the short problem of moving contact life among the current earth-leakage protection socket, provide a long service life's earth-leakage protection socket.

In order to achieve the above object, the utility model provides an earth leakage protection socket, it includes socket panel, circuit board, earth leakage protection device and base, has the stationary contact on the bottom surface of circuit board, and earth leakage protection device includes mounting bracket, adjustable shelf, moving contact, reset button and dropout subassembly. The mounting bracket is arranged on the bottom surface of the circuit board. The movable frame is connected to the mounting frame in a sliding manner through a movable frame return spring. One end of the moving contact is rotatably connected to the bottom surface of the circuit board, the other end of the moving contact is provided with a moving contact opposite to the static contact, and the body part of the moving contact is linked with the movable frame. Reset button is fixed in the mounting bracket through reset spring, and reset button's actuating lever wears to penetrate socket panel and stretches into the adjustable shelf in, the side of actuating lever has a block groove, and the end of actuating lever has the spigot surface of slope. The tripping assembly comprises a tripping driving piece and a tripping piece, the tripping driving piece is connected to the mounting frame and the electric connection circuit board along the transverse elastic connection mode, the tripping piece comprises a connecting portion and a clamping portion, the connecting portion is connected to the tripping driving piece in a sliding mode, and the clamping portion is arranged on the movable frame and locked or tripped with the clamping groove.

The reset button is pressed down, the driving rod moves down, the clamping part slides into the clamping groove, and the driving rod, the release fastener, the movable frame and the movable contact are in a linkage state; the reset button rebounds, the driving rod drives the tripping piece, the movable frame and the moving contact to move towards the direction of the circuit board, and the moving contact and the static contact are closed.

When the circuit board has electric leakage, the tripping driving piece drives the tripping piece to move towards the direction far away from the driving rod, the clamping part is tripped from the clamping groove, the driving rod, the tripping piece, the movable frame and the movable contact are released from linkage, the movable frame reset spring drives the movable frame and the movable contact to reset, and the movable contact and the static contact are disconnected.

According to the utility model discloses an embodiment, the adjustable shelf includes hollow support body and sets up in the shoulder draw-in groove of support body both sides, and earth leakage protection socket includes two moving contacts, and the somatic part of two moving contacts is connected respectively in the shoulder draw-in groove of adjustable shelf both sides.

According to an embodiment of the present invention, the earth leakage protection socket further includes at least one moving contact spring and at least one supporting member, the moving contact spring is connected between each moving contact and the circuit board; the supporting member is fixed on the circuit board, and each moving contact is rotatably connected with the supporting member.

According to the utility model discloses an embodiment, the middle part of adjustable shelf has horizontal slot, and in the block portion of taking off the fastener stretched into horizontal slot, the groove of stepping down that has the confession actuating lever to pass in the block portion.

According to the utility model discloses an embodiment, the iron core in induction coil is located to the trip driving piece including induction circuit board current change's induction coil and cover, and iron core reset spring transverse connection is passed through in the mounting bracket in the bottom of iron core, and induction coil is extended to the end of iron core, and the connecting portion of taking off the fastener are connected in the end of iron core.

According to the utility model discloses an embodiment has the connecting hole on the connecting portion of taking off the fastener, and the end of iron core has ring groove, and ring groove and relative iron core removal are located to the connecting hole cover.

According to the utility model discloses an embodiment has the spacing portion that the restriction adjustable shelf reset the displacement on the mounting bracket, and spacing portion is inside protruding, has the spacing cooperation portion corresponding with spacing portion on the adjustable shelf.

According to the utility model discloses an embodiment has a plurality of mounting holes on the circuit board, and the tip of mounting bracket has a plurality of buckles with a plurality of mounting hole matched with, and a plurality of buckles correspond the block in a plurality of mounting holes.

According to the utility model discloses an embodiment, the upper surface of mounting bracket has first spring screens, is provided with the second spring screens on the reset button, and first spring screens and second spring screens are fixed in at reset spring's both ends.

In summary, the leakage protection device is arranged in the leakage protection socket provided by the utility model, when the reset button is pressed, the driving rod moves down and extrudes the release piece, along with the movement of the driving rod, the clamping part of the release piece is clamped into the clamping groove on the driving rod, and the driving rod, the release piece, the movable frame and the moving contact are linked; when the driving rod resets under the action of the reset spring, the driving rod drives the release piece, the movable frame and the movable contact to move towards the direction of the circuit board, and the movable and static contacts are closed. When the tripping driving piece detects the electric leakage of the circuit board, the tripping driving piece drives the tripping piece to move towards the direction far away from the driving rod, the clamping part is separated from the clamping groove, the linkage state is released, the movable frame drives the movable contact to move towards the direction far away from the circuit board to reset, and the movable and static contacts are disconnected. The utility model provides a leakage protection socket utilizes the locking or the dropout of taking off fastener and actuating lever to realize the removal of moving contact to realize the closure and the branch of contact, moving contact itself need not to take place any elastic deformation, has consequently solved current leakage protection socket well and has taken place the problem that life is low that elastic deformation arouses because of moving contact itself, has improved leakage protection socket's life greatly.

Furthermore, the matching transmission structure of the clamping part and the clamping groove is very simple, when electric leakage occurs, not only stable triggering but also very fast triggering speed are achieved, and the use safety is greatly improved.

In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.

Drawings

Fig. 1 is an exploded view of a leakage protection socket according to an embodiment of the present invention.

Fig. 2 is a schematic structural diagram of the earth leakage protection device in fig. 1.

Fig. 3 is a schematic structural diagram of the earth leakage protection device shown in fig. 2 from another view angle.

Fig. 4 is a longitudinal cross-sectional view of the earth leakage protection device shown in fig. 2.

Fig. 5 is an exploded view of the earth leakage protection device shown in fig. 2.

Detailed Description

As shown in fig. 1, the earth leakage protection socket provided in this embodiment includes a socket panel 10, a circuit board 20, an earth leakage protection device 30 and a base 40, wherein two stationary contacts 201 are disposed on a bottom surface of the circuit board 20, and the earth leakage protection device 30 includes a mounting frame 1, a movable frame 2, a movable contact 3, a reset button 4 and a trip unit 5. The mounting bracket 2 is disposed on a bottom surface of the circuit board 20. The movable frame 2 is connected in the mounting frame 1 in a sliding way through a movable frame return spring 6. One end of the moving contact 3 is rotatably connected to the bottom surface of the circuit board 1, the other end is provided with a moving contact 31 opposite to the fixed contact 201, and the body part of the moving contact 3 is linked with the movable frame 2. The reset button 4 is fixed to the mounting frame 1 by the reset spring 7, the driving rod 41 of the reset button 4 penetrates the socket panel 10 and extends into the movable frame 1, the end of the driving rod 41 is provided with an inclined guide surface 411, and the side surface of the driving rod 41 is provided with an engaging groove 412.

The trip assembly 5 includes a trip driving member 51 and a trip member 52, the trip driving member 51 is elastically connected to the mounting frame 1 along a transverse direction and electrically connected to the circuit board 20, the trip member 52 includes a connecting portion 521 and a locking portion 522, the connecting portion 521 is slidably connected to the trip driving member 51, and the locking portion 522 is disposed on the movable frame 2 and locked or tripped with the locking groove 412.

In this embodiment, the circuit board 20 has three mounting holes 202, the end of the mounting bracket 1 has three fasteners 11 matching with the three mounting holes 202, and the three fasteners 11 are correspondingly engaged with the three mounting holes 202 to detachably connect the mounting bracket 1 and the circuit board 20. However, the present invention is not limited to this. In other embodiments, the mounting frame and the circuit board may be detachably connected by fasteners such as screws. The upper surface of the mounting bracket 1 is provided with a first spring clip 12, the reset button 4 is provided with a second spring clip 42, and two ends of the reset spring 7 are respectively fixed on the first spring clip 12 and the second spring clip 42. When the reset button 4 is pressed down by an external force, the reset spring 7 is compressed; when the action applied to the reset button 4 is cancelled, the reset spring 7 drives the reset button 4 to move upwards for resetting (the upper, lower, left and right ranges in the embodiment are all described based on the state of the earth leakage protection device shown in fig. 4).

In this embodiment, have in the mounting bracket 1 and be used for holding the vertical shaft hole that adjustable shelf 2 just supplied adjustable shelf 2 to reciprocate, adjustable shelf reset spring 6's both ends are connected respectively in mounting bracket 1 and adjustable shelf 2, and adjustable shelf 2 makes elastic movement in vertical shaft hole. Limiting parts 13 for limiting the reset displacement of the movable frame 2 are arranged in the vertical shaft hole of the mounting frame 1, the limiting parts 13 are inwards protruded and formed below the movable frame 2, and limiting matching parts 24 corresponding to the limiting parts 13 are arranged on the movable frame 2.

The movable frame 2 comprises a hollow frame body 21 and shoulder clamping grooves 22 arranged on two sides of the frame body 21, the leakage protection socket comprises two movable contacts 3 connected to the bottom surface of the circuit board 20 in a rotating mode, the body parts of the two movable contacts 3 are connected to the shoulder clamping grooves 22 on two sides of the movable frame respectively, and the two movable contacts 3 are linked with the movable frame 2. However, the present invention is not limited to this. In other embodiments, the earth leakage protection socket may also include a movable contact, and the corresponding circuit board has only a stationary contact.

In this embodiment, the earth leakage protection socket further includes two supporting members 8, the two supporting members 8 are both fixed to the circuit board 20, and the two movable contacts 3 are respectively rotatably connected to the two supporting members 8. In particular, each movable contact 3 has an end portion hinged to a corresponding support 8 and rotating with respect to the corresponding support 8. However, the present invention is not limited to this. In this embodiment, the earth leakage protection socket further includes two movable contact springs 9, and the two movable contact springs 9 are respectively connected between the two movable contacts 3 and the circuit board 20. Specifically, as shown in fig. 3, the body portion of the movable contact is connected to the circuit board 20 through the movable contact spring 9. When the movable frame 2 drives the movable contact 3 to rotate upwards to close the movable contact and the fixed contact, the movable contact spring 9 is compressed; when the release member 52 and the driving rod 41 are released, the reverse restoring force of the movable contact spring 9 drives the movable contact to rapidly move downwards, the movable contact 31 and the fixed contact 201 are rapidly separated, and the movable contact 3 is effectively prevented from shaking to cause arcing. In this embodiment, the moving contact 3 is connected to the circuit board through a soft copper braided wire, so that the electrical connection is reliable and stable. However, the present invention is not limited to this.

As shown in fig. 5, the movable frame 2 has a transverse slot 23 at the middle part, the engaging part 522 of the release member is inserted into the transverse slot 23, and the engaging part 522 has a relief slot 5221 for the driving rod 41 to pass through. When the driving rod 41 moves downward by an external force and passes through the escape groove 5221, the guide surface 411 at the bottom end of the driving rod 41 gradually presses the engaging portion 522 to the left; when the engaging portion 522 and the engaging slot 412 of the driving rod are located at the same horizontal position, the driving rod 41 moves downward continuously, and the engaging portion 522 slides into the engaging slot 412 to lock the driving rod.

In this embodiment, the trip driving member 51 includes an induction coil 511 for inducing the current change of the circuit board and an iron core 512 sleeved in the induction coil 511, the bottom end of the iron core 512 is transversely connected to the inside of the mounting frame 1 through an iron core return spring 513, the end of the iron core 512 extends out of the induction coil 511, and the connecting portion 521 of the trip member 52 is connected to the end of the iron core. Specifically, the connecting portion 521 of the release member has a connecting hole 5211, the end of the iron core 512 has a circular slot 5121, and the connecting hole 5211 is sleeved in the circular slot 5121 and moves up and down relative to the iron core 512. However, the present invention does not limit the connection manner between the release member and the core.

When the earth leakage protection socket of the present embodiment is used, the reset button 4 is pressed by an external force, the reset spring 7 is compressed, and the driving lever 41 moves in a direction in which the external force is pressed (downward movement in fig. 4). With the downward movement of the driving rod 41, the guiding surface 411 at the end of the driving rod 41 pushes the engaging portion 522 of the release member 52 to move away from the driving rod 41 (to the left in fig. 4), and the release member 52 moves in conjunction with the iron core 512 to the left and compresses the iron core return spring 513. When the driving rod 41 moves down to the engaging slot 411 and the engaging portion 522 are located at the same horizontal position, the reverse restoring force of the iron core return spring 513 drives the engaging portion 522 to move to the right and slide into the engaging slot 411. At this time, the driving lever 41, the release 52, the movable frame 2, and the movable contact 3 are locked to form an interlocking state. When the external force applied to the reset button 4 is removed, the reset button 4 rebounds and resets under the action of the reset spring 7, the driving rod 41 resets and simultaneously drives the release piece 52, the movable frame 2 and the movable contact 3 to move towards the direction of the circuit board (upward movement in fig. 3), the movable contact 31 on the movable contact 3 is closed with the fixed contact 201 on the circuit board 20, and the movable frame reset spring 6 is compressed. At this time, the earth leakage protection socket enters a normal working state.

When the circuit board 20 has a leakage phenomenon, the induction coil 511 is energized to generate a magnetic field, the iron core 512 moves leftward and presses the iron core return spring 513, the iron core 512 drives the release member 52 to move leftward, the engaging portion 522 slides out of the engaging groove 412 of the driving rod 41, the driving rod 411, the release member 52, the movable frame 2 and the movable contact 3 are disengaged, and the movable frame 2 loses the acting force of the driving rod 41. The reverse restoring force of the movable frame return spring 6 drives the movable frame 1 and the movable contact 3 to move (downward movement shown in fig. 4) in the direction away from the circuit board until the limit matching part 24 on the movable frame 2 abuts against the limit part 13 on the mounting frame 1, and the movable contact 31 is separated from the fixed contact 201 to realize leakage protection.

Although the present invention has been described with reference to the preferred embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but is capable of other modifications and variations without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. An earth leakage protection jack, comprising: socket panel, circuit board, earth leakage protection device and base, the bottom surface of circuit board has the stationary contact, earth leakage protection device includes:

the mounting frame is arranged on the bottom surface of the circuit board;

the movable frame is connected to the mounting frame in a sliding manner through a movable frame return spring;

one end of the moving contact is rotatably connected to the bottom surface of the circuit board, the other end of the moving contact is provided with a moving contact opposite to the static contact, and the body part of the moving contact is linked with the movable frame;

the reset button is fixed on the mounting frame through a reset spring, a driving rod of the reset button penetrates through the socket panel and extends into the movable frame, a clamping groove is formed in the side face of the driving rod, and an inclined guide surface is arranged at the tail end of the driving rod;

the tripping component comprises a tripping driving piece and a tripping piece, the tripping driving piece is elastically connected to the mounting frame along the transverse direction and is electrically connected with the circuit board, the tripping piece comprises a connecting part and a clamping part, the connecting part is connected to the tripping driving piece in a sliding mode, and the clamping part is arranged on the movable frame and is locked or tripped with the clamping groove;

the reset button is pressed down, the driving rod moves down, the clamping part slides into the clamping groove, and the driving rod, the release fastener, the movable frame and the movable contact are in a linkage state; the reset button rebounds, the driving rod drives the tripping piece, the movable frame and the movable contact to move towards the direction of the circuit board, and the movable contact and the static contact are closed;

2. The earth leakage protection socket of claim 1, wherein the movable frame comprises a hollow frame body and shoulder slots disposed on two sides of the frame body, the earth leakage protection socket comprises two movable contacts, and the body portions of the two movable contacts are respectively connected to the shoulder slots on two sides of the movable frame.

3. A leakage protection socket according to claim 1 or 2, wherein the leakage protection socket further comprises at least one movable contact spring and at least one supporting member, the movable contact spring is connected between each movable contact and the circuit board; the supporting member is fixed on the circuit board, and each moving contact is rotatably connected with the supporting member.

4. A leakage protection socket according to claim 1, wherein the movable frame has a transverse slot at a middle portion thereof, the engaging portion of the release member extends into the transverse slot, and the engaging portion has a relief slot for the driving rod to pass through.

5. A leakage protection jack according to claim 1, wherein the trip driving member includes an induction coil for inducing a current change of the circuit board and an iron core sleeved in the induction coil, a bottom end of the iron core is transversely connected in the mounting frame through an iron core return spring, a tail end of the iron core extends out of the induction coil, and a connecting portion of the trip member is connected to a tail end of the iron core.

6. A leakage protection socket according to claim 5, wherein the connecting portion of the release member has a connecting hole, the end of the core has a ring slot, and the connecting hole is disposed in the ring slot and moves relative to the core.

7. A leakage protection socket according to claim 1, wherein the mounting frame has a limiting portion for limiting the moving frame from moving back, the limiting portion protrudes inward, and the moving frame has a limiting engaging portion corresponding to the limiting portion.

8. A residual-current protection socket according to claim 1, wherein the circuit board has a plurality of mounting holes, the end of the mounting bracket has a plurality of fasteners matching with the plurality of mounting holes, and the plurality of fasteners are correspondingly engaged with the plurality of mounting holes.

9. A leakage protection socket according to claim 1, wherein the upper surface of the mounting bracket has a first spring detent, the reset button has a second spring detent, and the two ends of the reset spring are fixed to the first spring detent and the second spring detent.