CN211317735U

CN211317735U - Testing device of residual current circuit breaker

Info

Publication number: CN211317735U
Application number: CN202020122427.XU
Authority: CN
Inventors: 徐方剑; 王刚
Original assignee: Delixi Electric Co Ltd
Current assignee: Delixi Electric Co Ltd
Priority date: 2020-01-18
Filing date: 2020-01-18
Publication date: 2020-08-21
Anticipated expiration: 2030-01-18

Abstract

The utility model relates to a circuit breaker technical field especially discloses a residual current circuit breaker's test device, including casing seat, test button, movable contact, quiet contact and circuit board, test button swing joint is on the casing seat, movable contact is the torsional spring, the spiral middle part cover of torsional spring is established on the back shaft that sets up in the casing seat, the one end butt of torsional spring forms the contact jaw on test button, and the other end forms the stiff end with circuit board fixed connection, the stiff end becomes the bending setting, and it includes the flexion of being connected with the circuit board and connects the spacing portion in the flexion, be provided with on the casing seat and supply spacing portion to inlay the spacing groove of establishing. Adopt above-mentioned structure, provide one kind and can avoid the defect of current copper sheet structure, improve the life of test button greatly, have better promotion simultaneously in manufacturing process, make residual current circuit breaker's reliability show the residual current circuit breaker's that improves test device.

Description

Testing device of residual current circuit breaker

Technical Field

The utility model relates to a circuit breaker technical field, especially a residual current circuit breaker's test device.

Background

At present, the function of the testing device of the residual current circuit breaker is convenient for a user to check the residual current function, and whether the function is intact is judged by operating a test button.

In the prior art, the testing device of the residual current circuit breaker generally adopts a copper sheet material with elasticity as a contact piece, and the defects of deformation, poor reset and the like are easy to occur after long-time use, so that the risk of misjudgment on the product function is caused; meanwhile, the connection between the contact piece and the circuit board needs to be realized through lead wires and the like through soldering or other processes, the process is relatively complex, and the manufacturing cost is increased.

In order to overcome the above defects, the chinese patent with application number "201921635404.2" in the prior application of the present applicant discloses a testing device for a residual current circuit breaker, which uses a coil spring instead of a copper sheet to solve the problems caused by the copper sheet, but the coil spring in the technical scheme is easy to shake and cannot be fixed during installation, so that the connection between the end portion of the coil spring and a circuit board is difficult, and the problem needs to be solved urgently.

SUMMERY OF THE UTILITY MODEL

In order to overcome the not enough of prior art, the utility model provides a can avoid the defect of current copper sheet structure, improve the life of experimental button greatly, have better promotion simultaneously in manufacturing process, make residual current circuit breaker's reliability show the residual current circuit breaker's of improvement test device.

In order to realize the purpose, the utility model discloses a technical scheme is: the utility model provides a residual current circuit breaker's test device, includes casing seat, test button, movable contact spare, stationary contact spare and circuit board, and test button swing joint is on the casing seat, movable contact spare is the torsional spring, the spiral middle part cover of torsional spring is established on the back shaft that sets up in the casing seat, the one end butt of torsional spring forms the contact jaw on test button, and the other end forms the stiff end with circuit board fixed connection, the stiff end becomes the bending setting, and it includes the flexion of being connected with the circuit board and connects the spacing portion on the flexion, be provided with on the casing seat and supply spacing portion to inlay the spacing groove of establishing.

In the technical scheme, the fixed end of the torsion spring is fixed on the circuit board, the contact end is driven by the test button to move towards the direction close to the static contact element and is in contact conduction with the static contact element, then the test button can reset under the elastic action of the contact end, the torsion spring has two functions, one function is the self function of the spring to apply reaction force to the test button so that the test button can be timely restored to a normal position, the other function is the conduction function, one end of the torsion spring is fixed with the circuit board, the other end of the torsion spring and the static contact element fixed at the other point of the circuit board form a dynamic and static contact system, the fixed end and the circuit board can be fixedly connected in a welding or clamping way, the support shaft is sleeved in the middle of the spiral to play a supporting role, the diameter of the support shaft is matched with the inner diameter of the middle of, the sliding of the torsion spring is avoided, the limiting part is embedded in the limiting groove, the rotation of the torsion spring is avoided, the connection of the fixed end and the circuit board is facilitated, and the reliable contact and disconnection of the circuit device are realized.

As the utility model discloses a further setting, the contact jaw is formed by the tip at spiral middle part along the tangential direction extension at spiral middle part, the stiff end still has the connecting portion of being connected with the spiral middle part, and connecting portion are parallel with the axis at spiral middle part.

Among the above-mentioned technical scheme, the contact jaw sets up along the tangential direction at spiral middle part, realizes the elasticity maximize, makes things convenient for the test button to reset, and the stiff end reduces the installation volume along the axial setting of torsional spring, is favorable to the miniaturized design of circuit breaker.

As a further setting of the utility model, spacing portion has the extension parallel with connecting portion, and the tip that the flexion was kept away from to the extension is bent and is set up and constitute spacing section, spacing inslot is arranged in to spacing section and is constituted the location setting.

Among the above-mentioned technical scheme, spacing section is bent towards the direction of keeping away from test button, compact structure, and is small.

As the utility model discloses a further setting, the blind hole of spacing groove for being the cuboid, the notch department of spacing groove has round inclined plane and makes the notch be loudspeaker form.

Among the above-mentioned technical scheme, the notch of loudspeaker form is for inserting the spacing groove for convenient spacing section, improves the installation effectiveness, and spacing section is located the spacing inslot, and the inner wall of spacing groove is to spacing section limiting displacement, avoids the torsional spring to rock, and the setting of blind hole is that spacing section is deepened the spacing groove by excessive extrusion when avoiding flexion and circuit board to be connected, simple structure, and the installation effectiveness is high.

As a further setting of the utility model, be provided with the fixed orifices that supplies the flexion to wear to establish on the circuit board, the interference fit of stiff end and fixed orifices is realized with the inner wall butt of fixed orifices to connecting portion and extension.

Among the above-mentioned technical scheme, the setting of fixed orifices is for connecting conveniently, and the flexion is worn to establish back in the fixed orifices, because of connecting portion, flexion and extension section one-tenth U type, so can produce elasticity because of deformation when connecting portion and extension section draw close each other, but this elasticity makes stiff end joint in the fixed orifices, need not the welding, connects more convenient and fast.

The present invention will be further described with reference to the accompanying drawings.

Drawings

FIG. 1 is a schematic view of an embodiment of the present invention;

FIG. 2 is an internal structure diagram of the embodiment of the present invention;

FIG. 3 is an internal structure diagram of the embodiment of the present invention;

FIG. 4 is a structural diagram of a test button according to an embodiment of the present invention;

FIG. 5 is a structural diagram of a torsion spring according to an embodiment of the present invention;

fig. 6 is an internal structure diagram of the embodiment of the present invention.

Detailed Description

The utility model discloses a concrete embodiment is shown in fig. 1-6, a residual current circuit breaker's test device, including casing seat 1, test button 2, movable contact, static contact and circuit board 3, movable contact is

torsional spring

4, 41 covers in the middle part of the spiral of torsional spring 4 are established on the back shaft 11 that sets up in casing seat 1, the one end and the 3 fixed connection of circuit board of torsional spring 4 form stiff end 42, and the other end butt forms contact jaw 43 on test button 2, test button 2 can drive contact jaw 43 and remove to and switch on with the contact of static contact. The fixed end 42 is arranged in a bent manner and comprises a bent portion 423 connected with the circuit board 3 and a limiting portion 422 connected to the bent portion 423, and a limiting groove 13 for embedding the limiting portion 422 is formed in the housing base 1. The torsion spring 4 is made of an elastic conductive material, the fixed end 42 of the torsion spring 4 is fixed on the circuit board 3, the contact end 43 is driven by the test button 2 to move towards the direction close to the static contact element and to be in contact conduction with the static contact element, then the test button 2 can reset under the elastic action of the contact end 43, the torsion spring 4 has two functions, one is used as the function of the spring to apply reaction force to the test button 2 so that the test button can be timely restored to a normal position, the other is used as the conduction function, one end of the torsion spring is fixed with the circuit board 3, the other end of the torsion spring and the static contact element fixed at the other point of the circuit board 3 form a dynamic and static contact system, the fixed end 42 and the circuit board 3 can be fixedly connected in a welding or clamping way, the support shaft 11 is sleeved on the spiral middle part 41 to play a, the supporting shaft 11 is provided with a limiting convex ring, the limiting convex ring and the torsion spring 4 form limiting fit, the torsion spring 4 is prevented from sliding, and reliable contact and disconnection of the circuit device are achieved.

The contact end 43 is formed by extending the end of the spiral middle portion 41 along the tangential direction of the spiral middle portion 41, and the fixed end 42 further has a connection portion 421 connected to the spiral middle portion 41, wherein the connection portion 421 is parallel to the axis of the spiral middle portion 41. The contact end 43 is arranged along the tangential direction of the spiral middle part 41, so that the elastic force maximization is realized, the resetting of the test button 2 is facilitated, the fixed end 42 is arranged along the axial direction of the torsion spring 4, the installation volume is reduced, and the miniaturization design of the circuit breaker is facilitated.

The limiting part 422 is provided with an extending section 4221 parallel to the connecting part 421, the end part of the extending section 4221 far away from the bending part 423 is bent to form a limiting section 4222, and the limiting section 4222 is arranged in the limiting groove 13 to form a positioning arrangement. Spacing section 4222 is bent towards the direction of keeping away from test button 2, compact structure, small.

The limiting groove 13 is a blind hole with a cuboid shape, and a circle of inclined surface 131 is arranged at the notch of the limiting groove 13 to enable the notch to be trumpet-shaped. The horn-shaped notch is used for facilitating the insertion of the limiting section 4222 into the limiting groove 13, the installation efficiency is improved, the limiting section 4222 is located in the limiting groove 13, the inner wall of the limiting groove 13 has a limiting effect on the limiting section 4222, the torsional spring is prevented from shaking, the blind hole is formed in a mode that the limiting section 4222 is excessively extruded to penetrate into the limiting groove 13 when the bending portion 423 is connected with the circuit board 3, the structure is simple, and the installation efficiency is high.

The circuit board 3 is provided with a fixing hole 31 through which the bent portion 423 is inserted. The setting of fixed orifices 31 is for connecting conveniently, and the back is worn to establish in fixed orifices 31 to flexion 423, because of connecting portion 421, flexion 423 and extension 4222 become the U type, so can produce elasticity because of the deformation when connecting portion 421 and extension 4222 draw close to each other, but this elasticity messenger stiff end 42 joint is in fixed orifices 31, need not the welding, connects more convenient and fast.

One end of the test button 2 penetrates through the shell seat 1 to form a pressing end 21, the other end of the test button is located in the shell seat 1 and is abutted to a contact end 43 of the torsion spring 4 to form a driving end 22, an arc-shaped surface 221 is arranged on the driving end 22, and the contact end 43 is abutted to the arc-shaped surface 221 and is tangent to the arc-shaped surface 221. Pressing end 21 exposes outside casing seat 1, the manual operation of being convenient for, setting up of arcwall face 221 guarantees that contact jaw 43 is the tangential direction of arcwall face 221 along the helical direction, is pressed at test button 2 and drives torsional spring 4 during operation, ensures torsional spring 4's steady motion, improves stability.

The driver end 22 has a recess 222 therein, and the curved surface 221 is located at the recess 222. The recess 222 is provided to provide a stop to prevent the contact end 43 from disengaging the driver end 22.

The recess 222 has a limiting arm 223 protruding outward at one side thereof and an inclined surface 224 at the other side thereof, wherein the inclined surface 224 is inclined from the side close to the recess 222 to the side far from the recess 222 in the direction far from the torsion spring 4. The setting of spacing arm 223 can avoid contact jaw 43 to beat at will, and the guarantee moves contact piece job stabilization, and during the assembly, the setting of inclined plane 224 can make things convenient for in contact jaw 43 slides in test button 2's sunken 222, and the back of assembling, torsional spring 4 has certain just counter-force to test button 2, has two advantages like this: firstly, guarantee that the initial position of test button 2 is correct, secondly guarantee the distance with the stationary contact spare, make to have the electric clearance between torsional spring and the row needle, prevent the malfunction.

The shell seat 1 is provided with a through hole 12 for the pressing end 21 to pass through, the test button 2 can move along the axial direction of the through hole 12, the driving end 22 is provided with an expanding body 225 which forms a limiting fit with the through hole 12, and a supporting block 13 for the expanding body 225 to abut against is arranged below the driving end 22. The supporting block 13 and the through hole 12 are arranged to ensure that the test button 2 can slide along the specified direction in a guiding manner, so that the movement is more stable, and the operation is more firm.

After the test button 2 is pressed down, the movable contact piece and the static contact piece are contacted with each other to conduct a circuit, and a working state is achieved, and it is also worth mentioning that after the test button 2 applies pressure to the torsion spring 4, the torsion spring 4 has over travel relative to the contact pin 5, namely, assuming that the contact pin 5 is taken off, the contact end 43 can move farther, so that stable work can be ensured after multiple times of use.

The utility model discloses do not confine the above-mentioned embodiment to, the general technical personnel in this field can adopt other multiple embodiments to implement according to the utility model discloses a, perhaps all adopt the utility model discloses a design structure and thinking do simple change or change, all fall into the utility model discloses a protection scope.

Claims

1. The utility model provides a residual current circuit breaker's test device, includes casing seat, test button, movable contact, static contact and circuit board, and test button swing joint is on the casing seat, its characterized in that: the movable contact piece is a torsion spring, the spiral middle part of the torsion spring is sleeved on a support shaft arranged in the shell seat, one end of the torsion spring is abutted to form a contact end on the test button, the other end of the torsion spring is fixedly connected with the circuit board to form a fixed end, the fixed end is arranged in a bent mode and comprises a bent portion connected with the circuit board and a limiting portion connected to the bent portion, and a limiting groove for the limiting portion to be embedded is formed in the shell seat.

2. Testing device for residual current circuit breakers according to claim 1, characterized in that: the contact end is formed by extending the end part of the middle part of the spiral along the tangential direction of the middle part of the spiral, the fixed end is also provided with a connecting part connected with the middle part of the spiral, and the connecting part is parallel to the axis of the middle part of the spiral.

3. Testing device for residual current circuit breakers according to claim 2, characterized in that: the limiting part is provided with an extension section parallel to the connecting part, the end part of the extension section, far away from the bending part, is bent to form a limiting section, and the limiting section is arranged in the limiting groove to form a positioning arrangement.

4. A testing device for residual current circuit breakers, according to any of the claims 1 to 3, characterized in that: the spacing groove is the blind hole that is the cuboid, the notch department of spacing groove has round inclined plane and makes the notch be loudspeaker form.

5. Testing device for residual current circuit breakers according to claim 3, characterized in that: be provided with the fixed orifices that supplies the flexion to wear to establish on the circuit board, the interference fit of stiff end and fixed orifices is realized with the inner wall butt of extension and fixed orifices to connecting portion.