WO2020019359A1

WO2020019359A1 - Micro switch used for location signal device of breaker

Info

Publication number: WO2020019359A1
Application number: PCT/CN2018/097829
Authority: WO
Inventors: 余水峰; 韩云; 顾洪峰
Original assignee: 大全集团有限公司; 南京大全电气研究院有限公司; 江苏大全凯帆开关有限公司
Priority date: 2018-07-24
Filing date: 2018-08-01
Publication date: 2020-01-30
Also published as: CN110752124A

Abstract

The present invention relates to a micro switch, and relates in particular to a micro switch used for a location signal device of a breaker and a location signal device of a breaker using the micro switch. A micro switch used for a location signal device of a breaker, wherein the micro switch is provided with a housing and a moving sheet, the housing is provided with a contact, an end of the moving sheet is connected to the housing, the connection position between the moving sheet and the housing acts as a pivot for movement, and when the moving sheet is pressed, the moving sheet is pressed down to touch the contact; a free end of the moving sheet is V-shaped or semi V-shaped; top and bottom sides of the housing of the micro switch are provided with insulating gaskets. The present invention solves the problem wherein the reliability of signal feedback is low due to a micro switch easily being touched by mistake when isolation and test distances are small, and also solves the problem wherein the requirements for the precision of drawer trilocation is high.

Description

Micro switch for position signal device of circuit breaker

Technical field

The invention relates to a micro-switch, in particular to a micro-switch for a position signal device of a circuit breaker and a circuit-breaker position signal device using the micro-switch.

Background technique

Universal frame circuit breakers are low-voltage circuit breakers, which are widely used in circuit grids with AC 1200V and below and DC 1500V and below. In GB14048.2, various technical parameters, performances and indexes of low-voltage circuit breakers are listed in detail. An important one is that the drawer circuit breaker should be installed with a reliable indicating device, which should clearly indicate the location of the isolation contact. The conventional indicating device can only be embodied on a circuit breaker. Now, a position signal device is added to the indicating device. The traditional position signal device has a complicated structure and low reliability.

An existing patent number is 2010200009380, and the patent name is the existing technology of the three-position signal acquisition device of the drawout circuit breaker. The utility model specifically includes: a bottom plate, a push plate, a housing and a lock plate, and the housing is installed on the bottom plate. The push plate is located on the upper part of the housing. A wave lever that moves with the push plate is installed on the push plate. The wave lever is V-shaped. There are several state micro-switches in the area covered by the movement of the wave lever. The switch is located at a position corresponding to the working state in which the push plate is pushed. The state micro switch includes a connected state micro switch W3, a disconnected state micro switch W1, and a test state micro switch W2. There is a lock state micro switch W0. W1, W2, and W3 are respectively combined with W0, so that the position of the transmission circuit breaker is in a separate locked state / unlocked state, a test locked state / unlocked state, and a connected locked state / unlocked state. As shown in FIG. 8, the utility model still has the following problems: First, the end of the moving piece of the micro switch used by the utility model is circular, and it contacts the V-shaped part mounted on the slide plate to cause the micro switch to operate, and The round end is in contact with the V-shaped part, which is equivalent to point contact. Therefore, the position accuracy requirements for the three positions of the product are very high, which will cause a low pass rate. The second reason is that the round end is in contact with the V-shaped part of the push plate. In the case where the moving stroke of the moving switch is not changed, if the circle radius is small, the moving plate and the V-shaped part of the push plate may not be in good contact, resulting in incorrect position feedback. If the circle radius is large, the distance between the separation and test positions is very close. At this time, it is easy to cause the micro motion of the test and separation to move simultaneously. Third, the complicated structure takes up a lot of space, and drawers in small spaces cannot be installed.

An existing application number is 2017112102264, and the patent name is the prior art of a three-position signal device for a circuit breaker. The invention relates to a three-position signal device for a circuit breaker, which includes a bottom plate, a bracket, and a slide plate. A three-position signal mechanical lock is installed on the bottom plate of the right side of the slide plate; a support plate is fixedly arranged on the upper end of the slide plate, and the right end of the support plate is connected with a positioning member in the three-position signal mechanical lock; the bracket is provided with a buckle that can be rotated horizontally forward and backward The left end of the sprocket is connected to the bracket rotatably, the right end of the sprocket is connected to the angular link of the three-position signal mechanical lock, and the front end of the sprocket forms a convex; the bottom plate is provided with a general micro switch, and the slab's horizontal front-back motion control Micro switch on and off. As shown in Figure 8, the microswitch used in this invention patent does not have a moving piece for interlocking. The switch on the microswitch is in direct contact with the part mounted on the slide. The switch is easy to slide in contact with the part. Damage, resulting in a short service life of the entire device. In addition, the invention must be used together with the mechanical lock mentioned in the article, the use environment is limited, and the design is limited, which is not conducive to the modular design, which easily causes complex installation and does not have universality in use.

Summary of the Invention

In order to solve the problems in the prior art of the circuit breaker position signal device, such as the difficulty in design, low production qualification rate, irrational structural design and large space occupation, the invention designs a micro-motion for the circuit breaker position signal device. Switch and circuit breaker position signal device using the micro switch.

The invention patent content is as follows:

A micro-switch for a position signal device of a circuit breaker. The micro-switch is provided with a casing and a moving piece. The casing is provided with a contact. One end of the moving piece is connected to the casing. The connection point with the housing acts as a fulcrum. When the moving piece is pressed, the moving piece is pressed down to contact the contact; the moving piece enables the end of the push plate (231) to be accommodated in the movement of an adjacent micro switch. The groove between the pieces is empty, and the end of the push plate (231) is not in contact with the moving piece of the adjacent micro switch; the upper and lower sides of the housing of the micro switch are provided with insulating gaskets. .

Wherein, the free end of the moving piece is V-shaped or semi-V-shaped; the free end is an obtuse angle between the first bending section of the V-shaped moving piece and the sliding direction of the slide plate is 125-150 °; The obtuse angle between the second bending section of the sheet and the sliding direction of the skateboard is 125-150 °; the angle at the connection between the first bending section and the second bending section is rounded corner A, and the radius of the rounded corner A 0-3mm, rounded corner A is 70-120 °;

The free end is a semi-V-shaped moving piece, and the obtuse angle between the bending section and the sliding direction of the slide plate is 125-150 °.

Wherein, the free end is a V-shaped moving piece, the obtuse angle between the first bending section and the sliding direction of the skateboard is 133 °, and the obtuse angle between the second bending section and the sliding direction of the skateboard is 133 °; The radius of the angle A is 0.5 mm, and the rounded corner A is 86 °. The free end is a semi-V-shaped moving piece, and the obtuse angle between the bending section and the sliding direction of the slide plate is 133 °.

The invention also relates to a position signalling device for a circuit breaker,

Including drawers, position signal components, slides and terminals;

The slide plate is disposed inside the drawer, and the position signal component is provided on one side of the slide plate;

The position signal component is provided with at least two sub-micro switches and a total micro-switch. The sub-micro switch and the main micro-switch are disposed on a micro-motion support. Each micro-motion of the position signal component is provided. The switches are connected to the terminal;

A push plate is provided at an end of the slide plate, and the end of the push plate is in contact with the moving piece of the sub-micro switch of the position signal component; the position of each sub-micro switch corresponds to the circuit breaker when the push plate is advanced The position of the working state; the master micro switch is controlled by an indicator button to switch on and off.

Wherein, the end of the push plate is an isosceles trapezoid.

Wherein, an angle between an upper bottom edge of the trapezoidal plate and a side waist of the trapezoid is a rounded corner, and a radius of the rounded corner is 0.2-3 mm.

Wherein, the angle of the included angle B of the extension line where the sides of the trapezoid are located is smaller than the angle of the rounded corner A of the micro switch moving piece.

Wherein, the end of the push plate can be accommodated in the space between the V-shaped moving pieces of the two sub-micro switches.

Wherein, the position signal device is provided with three micro-switches, which are a second micro-switch, a third micro-switch, and a fourth micro-switch; the second micro-switch has a first micro-switch. The second moving piece has a third moving piece and the fourth minute moving switch has a fourth moving piece. The free ends of the second moving piece and the third moving piece are V-shaped. The free end is a semi-V shape.

Wherein, the total micro switch of the position signal device is connected in series with the third minute micro switch, and the feedback circuit breaker body is in a separate position in the drawer seat; the total micro switch of the position signal device and the second minute micro switch are feedbacked. The switches are connected in series to feedback whether the circuit breaker body is in the test position in the drawer base; the general micro switch of the position signal device is connected in series with the fourth minute micro switch, and the feedback circuit breaker body is in the connected position in the drawer base.

In summary, due to the adoption of the above technical solution, the beneficial effects of the patent of the present invention are:

In the invention patent, a position signal device is arranged in the drawer of the circuit breaker. The ends of the moving blades of the second and third sub-micro switches are V-shaped, and the ends of the moving blades of the fourth sub-micro switch are semi-V-shaped. It not only solves the problem that the separation and test distance is small, the micro switch is easy to be touched by mistake, resulting in low reliability of signal feedback, but also solves the problem of high requirements for the three-position accuracy of the drawer. The four micro switches are mounted on a bracket, and the micro-moving bracket is fixed by using the screw hole position originally used for setting the fixing cover. Therefore, the invention has the advantages of simple structure, high reliability, wide applicability, and convenient installation, and can effectively provide the drawer type circuit breaker with the position signal of the circuit breaker body in the drawer.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a structural diagram of a drawer type circuit breaker in which the present invention is installed

Figure 2 is the installation structure diagram of the present invention

FIG. 3 is an installation structure diagram of the invention after removing some parts of FIG. 2

FIG. 4 is a perspective structural view of the present invention

Figure 5 is a right side view, a front view and a left side view of the present invention

Figure 6 is an enlarged view of the structure of the present invention

FIG. 7 is a control circuit diagram of the present invention

FIG. 8 is a schematic diagram of a micro switch mentioned in the background art

Figure 9 is a schematic diagram of the shape and size of the micro switch and the push plate of the present invention

FIG. 10 is an embodiment of the micro switch of the present invention.

Among them, 1 is a circuit breaker, 2 is a drawer, 3 is a position signal component, 21 is an indicator button, 211 is an indicator button contact surface, 22 is a screw, 221 is a screw hole, 23 is a slide plate, 231 is a push plate, 232 Is a threaded sleeve, 24 is a rotating shaft, 25 is a handle, 26 is a connection terminal, 31 is a first micro switch, 311 is a first moving piece, 32 is a second minute moving switch, 321 is a second moving piece, 33 Is the third minute switch, 331 is the third moving piece, 34 is the fourth minute switch, 341 is the fourth moving piece, 35 is the micro moving bracket, 301 is the contact, 302 is the insulating gasket, and 303 is The first bending section, 304 is the second bending section, A is the fillet at the junction of the first bending section and the second bending section, and B is the angle between the extension lines where the two sides of the trapezoid are located.

detailed description

Example 1

As shown in FIG. 1, a drawer-type circuit breaker, in which the circuit breaker 1 is disposed in the drawer 2, the front panel of the circuit breaker 1 is provided with an indicator button 21, a screw hole 221 and a handle 25.

As shown in FIG. 2 and FIG. 3, the position signal component 3 is disposed inside the drawer 2 of the circuit breaker and is located on one side of the slide plate 23. An end of the slide plate 23 is provided with a push plate 231. The free end and position of the push plate 231 The signal component 3 is in contact fit. The end of the push plate 231 is an isosceles trapezoid. The angle between the upper bottom edge of the trapezoid and the side waist of the trapezoid is rounded, and the radius of the rounded corner is 0.2-3mm. The included angle between the extension lines where the two sides of the trapezoid are located is B. This design makes the push plate squeeze the moving piece more smoothly.

The screw 22 penetrates the screw hole 221 and the threaded sleeve 232 provided on the push plate 231. The screw 22 drives the slide plate 23 back and forth through the threaded sleeve 232, thereby driving the rotating shaft 24 to allow the circuit breaker 1 to enter and exit the drawer 2.

As shown in FIG. 3 and FIG. 4, the position signal component 3 is composed of a first master micro switch 31, a second sub micro switch 32, a third sub micro switch 33, and a fourth sub micro switch 34. An insulating gasket 302 is arranged on the upper and lower sides to form a sandwich shape with two layers of gaskets sandwiching the micro switch, to protect the micro switch from forming a direct connection with the circuit breaker; four micro switches are mounted on the micro switch bracket 35, Each micro-switch has its own moving piece. The first micro-switch 31 is provided with a first moving piece 311, the second sub-micro switch 32 is provided with a second moving piece 321, and the third sub-micro switch is provided. 33 is provided with a third moving piece 331, and the fourth sub-micro switch 34 is provided with a fourth moving piece 341; the second moving piece 331 and the third moving piece 331 enable the end of the push plate 231 to be accommodated here In the recess between the moving pieces of two adjacent micro-switches, the end of the push plate 231 is not in contact with the second moving piece 321 and the third moving piece 331. As shown in FIG. 8, in this embodiment, the free ends of the second moving piece 321 and the third moving piece 331 are V-shaped, and the free ends are V-shaped moving pieces. The first bending section 303 and The obtuse angle between the sliding direction of the skateboard is 125-150 °; the obtuse angle between the second bending section 304 of the V-shaped moving piece and the sliding direction of the skateboard is 125-150 °, and the first bending section 303 and the second bend The corner where the folded section 304 is connected is a rounded corner A, the radius of the rounded corner A is 0-3 mm, and the rounded corner A is 70-120 °.

Each sub-micro switch is installed at a position corresponding to the working state of the circuit breaker when the push plate is advanced. The third sub-micro switch 33 corresponds to the position where the circuit breaker is in a separated state, and the second sub-micro switch 32 corresponds to At the position where the circuit breaker is in the test state, the fourth minute switch 34 corresponds to the position where the circuit breaker is in the connected state.

The position of the first master micro-switch 31 is adapted to the position of the indicator button 21, and the contact and separation with the indicator button contact 21 corresponds to the position of the reset or moving state of the indicator button 21, which shows the lock of the circuit breaker. Or action status.

Example 2

The type of the micro switch used in this embodiment is LXW19-11A, and the moving piece of the present invention is improved. As shown in FIG. 3, when we want to move the circuit breaker, at this time, the indicator button 21 is in a reset state, and the indicator button contact surface 211 is in contact with the moving piece 311 of the first micro switch 31. Take out the handle 25 from the original position, insert it into the screw hole 221, and then press the indicator button 21 to rotate the screw 22. The slide 23 is moved by the screw sleeve 232 under the action of the screw sleeve 232. At the same time, the circuit breaker body 1 moves with the transmission of the rotating shaft 24.

When the circuit breaker moves to the disengaged position, the indicator button 21 returns to the reset state, and the handle 25 cannot continue to rotate. At this time, the indicator button contact surface 211 is in contact with the first moving piece 311 of the first micro switch 31. The moving piece 311 is bent downward to overlap with the contact 301 under pressure, and the first master micro-switch 31 is turned on again.

During the rotation of the screw 22, the push plate 231 is continuously approaching the third minute micro switch 33 from the lower part of the figure. When the circuit breaker is about to reach the separated state, the end of the push plate 231 and the first minute micro switch 33 The second bending section 304 of the three moving piece 331 is in contact with each other. As shown in FIG. 9, the free end of the third moving piece is V-shaped, and the obtuse angle between the first bending section 303 and the sliding direction of the slide plate is 133 °. The obtuse angle between the second bending section 303 and the sliding direction of the skateboard is 133 °, and the angle between the first bending section 303 and the second bending section 304 is a rounded corner A, and the angle of the rounded corner A is 86 ° The radius of the fillet A is 0.5 mm. As shown in FIG. 10, the second bending section 304 of the third moving piece 331 is pressed, which causes the third moving piece 331 to bend downward and overlap with the contact 301. The end of the push plate 231 is an isosceles trapezoid. The included angle between the upper bottom edge of the trapezoid and the side waist of the trapezoid is rounded, the included angle between the extension lines where the sides of the trapezoid are located is B, the radius of the rounded corner is 0.5mm, and the included angle The angle of B is 50 degrees. In this way, the end of the push plate 231 can smoothly pass through the V-shaped moving piece, squeeze the moving piece and smoothly pass the rounded corner A of the V-shaped moving piece, so that the moving piece is separated from the contacts. The third minute micro switch 33 is turned on. At this time, since the micro switch 31 and the micro switch 33 are connected in series, as shown in FIG. 7, 50 # and 55 # of the terminal 26 are turned on; the handle 25 drives the screw 22 to continue to rotate, The push plate 231 is in contact with the third moving piece 331 of the third minute switch 33 until the end of the push plate 231 crosses the apex of the V-shape and reaches the space between the third moving piece 331 and the second moving piece 321. The push plate 231 no longer presses the third moving piece 331, and the third moving piece 331 is overlapped with and separated from the contact 301 of the third minute micro-switch 33, so that the third minute micro-switch 33 is turned off, resulting in 50 # and 55 # are disconnected, and the connection and disconnection of the terminal will feed back the signal that the circuit breaker body is in the separated position in the drawer.

In order to make the circuit breaker continue to move, press the indicator button 21, the handle 25 can continue to rotate, and the push plate 231 continues to move upward as shown in the figure. When the circuit breaker 1 moves to the test position, the indicator button 21 returns to the reset state, and the handle 25 can not continue to rotate, at this time, the button contact surface 211 of the indicator member is in contact with the first moving piece 311 of the first general micro switch 31, and the first moving piece 311 is bent downward and overlaps with the contact 301 under pressure. The switch 31 is turned on again; during the rotation of the screw 22, the push plate 231 is continuously approaching the second minute switch 32. When the circuit breaker is about to reach the test state, the end of the push plate 231 and the second minute switch The first bending section 303 at the second moving piece 321 of 32 is in contact. As shown in FIG. 9, the configuration of the second moving piece 321 is the same as that of the third moving piece 331, and the free end is V-shaped, and the first The obtuse angle between the bending section 303 and the sliding direction of the skateboard is 133 °, the obtuse angle between the second bending section 304 and the sliding direction of the skateboard is 133 °, and the circle between the first bending section 303 and the second bending section 304 is a circle Angle A, the angle of the rounded corner A is 86 °, and the radius of the rounded corner A is 0.5 mm. The second moving piece 321 is bent downward to overlap with the contact 301, and the second sub-micro switch 32 is turned on. At this time, because the micro switch 31 and the micro switch 32 are connected in series, as shown in FIG. 7, the terminal 26 50 # and 53 # are turned on; the handle 25 drives the screw 22 to continue to rotate, and the push plate 231 and the second moving piece 321 of the second minute switch 32 remain in contact until the push plate 231 passes the second bend and pushes The plate 231 no longer presses the second moving piece 321, and the second moving piece 321 and the contact 301 of the second sub-micro switch 32 are overlapped and separated, so that the second sub-micro switch 32 is opened, resulting in 50 of the terminal 26 # 和 53 # is disconnected, and the connection and disconnection of the wiring terminal feedback the signal that the circuit breaker body is in the test position in the drawer.

To keep the circuit breaker moving, press the indicator button 21 and the handle 25 can continue to rotate. The push plate 231 continues to move upward as shown in the figure. When the circuit breaker 1 moves to the connected position, the indicator button 21 returns to the reset state. 25 cannot continue to rotate, at this time, the button contact surface 211 of the indicator contacts the first moving piece 311 of the first general micro-switch 31. The first moving piece 311 is bent downward and overlaps with the contact 301 under pressure. The micro switch 31 is turned on again; during the rotation of the screw 22, the push plate 231 is constantly close to the fourth minute micro switch 32. When the circuit breaker is about to reach the connection state, the push plate 231 and the fourth minute micro switch 34 The semi-V-shaped moving piece at the fourth moving piece 341 is in contact with each other. The obtuse angle between the bending section of the half-V-shaped moving piece and the direction of the sliding plate is 133 °, and the fourth moving piece 341 is bent downward and contacts the contact 301 under pressure. Overlap, the fourth minute micro-switch 34 is turned on. At this time, since the micro-switch 31 and the micro-switch 34 are connected in series, as shown in FIG. 7, 50 # and 51 # of the terminal 26 are turned on; the handle 25 drives the screw 22 Continue to rotate, the push plate 231 is in contact with the second moving piece 341 of the fourth minute switch 34, and After the second half of the V-shaped projection is bent, the push plate 231 and the fourth sub-micro switch 34 is still kept in contact until the slider 23 can continue to advance because of structural limitations stopped. The 50 # and 51 # connection state of the terminal 26 feedbacks the signal that the circuit breaker body is in the connected position in the drawer.

Claims

A micro switch for a position signal device of a circuit breaker, characterized in that: the micro switch is provided with a housing and a moving piece, the housing is provided with a contact (301), one end of the moving piece is connected with The housing is connected, and the moving piece acts as a fulcrum at the connection point with the housing. When the moving piece is pressed, the moving piece is pressed down to contact the contact (301); the moving piece enables the end of the push plate (231) to It is accommodated in the groove space between the moving pieces of the adjacent micro switch, and the end of the push plate (231) is not in contact with the moving pieces of the adjacent micro switch.
The micro switch according to claim 1, characterized in that the free end of the moving piece is V-shaped or semi-V-shaped; the free end is a first bending section (303) of the V-shaped moving piece and the slide plate The obtuse angle between the moving direction is 125-150 °; the obtuse angle between the second bending section (304) of the V-shaped moving blade and the skateboard moving direction is 125-150 °; the first bending section (303) and The corner of the connection of the second bending section (304) is a rounded corner (A), the radius of the rounded corner (A) is 0-3mm, and the rounded corner (A) is 70-120 °;

The free end is a semi-V-shaped moving piece, and the obtuse angle between the bending section and the sliding direction of the slide plate is 125-150 °.
The micro switch according to claim 2, wherein the free end is a V-shaped moving piece, and an obtuse angle between the first bending section (303) and the sliding direction of the slide plate is 133 °, and the second bending The obtuse angle between the folded section (304) and the direction of the slide is 133 °; the radius of the rounded corner (A) is 0.5mm, and the rounded corner (A) is 86 °; the free end is a semi-V-shaped dynamic The obtuse angle between the bending section and the sliding direction of the plate is 133 °.
The micro switch according to claim 1, 2, and 3, characterized in that an insulating gasket (302) is provided on the upper and lower sides of the housing of the micro switch.
A position signal device for a circuit breaker is characterized by:

Including a drawer (2), a position signal assembly (3), a sliding board (23) and a terminal (26);

The slide plate (23) is disposed inside the drawer (2), and the position signal component (3) is provided on one side of the slide plate (23);

The position signal component (3) is provided with at least two sub-micro switches and a main micro-switch (31), and the sub-micro switch and the main micro-switch (31) are disposed on the micro-moving support (35). Above, each micro switch of the position signal component is connected to a terminal (26);

All the micro-switches are the micro-switches according to claim 1, 2, 3, and 4;

A push plate (231) is provided at an end of the slide plate (23), and the end of the push plate (231) is in contact with the moving piece of the sub-micro switch of the position signal component (3);

The position of each sub-micro switch corresponds to the position of the working state of the circuit breaker when the push plate (231) is advanced;

The master micro switch is controlled by an indicator button (21).
The position signal device according to claim 5, wherein an end of the push plate (231) is an isosceles trapezoid.
The position signal device according to claim 6, characterized in that the angle between the upper bottom edge of the trapezoid and the side waist of the trapezoid at the end of the push plate (231) is a rounded corner, and the radius of the rounded corner is 0.2-3mm.
The position signal device according to claim 6, characterized in that the angle of the included angle (B) of the extension line where the two sides of the trapezoidal side waist of the end of the push plate (231) is smaller than the rounded corner of the micro switch moving piece (A).
The position signal device according to claim 5, characterized in that: the position signal device is provided with three sub-micro switches, respectively a second sub-micro switch (32) and a third sub-micro switch (33) ), A fourth sub-micro switch (34); the second sub-micro switch (32) has a second moving piece (321), and the third sub-micro switch (33) has a third moving piece (331), The fourth micro switch (34) has a fourth moving piece (341). The free ends of the second moving piece (321) and the third moving piece (331) are V-shaped, and the free ends of the fourth moving piece (341) are free. The ends are half-V-shaped.
The position signal device according to claim 9, characterized in that: the total micro switch of the position signal device and the third minute micro switch are connected in series, and feedback whether the circuit breaker body is in a separated position in the drawer seat; the position The total micro switch of the signal device is connected in series with the second sub micro switch, and the feedback circuit breaker body is in a test position in the drawer seat; the total micro switch of the position signal device is connected in series with the fourth sub micro switch, and the feedback is open. Whether the device body is in the connected position in the drawer seat.