Miniature residual-current circuit breaker

Abstract

The utility model discloses a small residual-current circuit breaker, which comprises a drain electrode and a circuit breaker electrode, an operating mechanism is arranged on the circuit breaker pole, and an assembling needle of the operating mechanism extends out from one side of the circuit breaker pole; the drain electrode comprises an electric leakage shell, an electric leakage mechanism and a tripping sliding block, and the electric leakage mechanism is arranged in the electric leakage shell; a stroke groove is formed in the surface of the electric leakage shell, the tripping sliding block is arranged in the stroke groove in a sliding mode, one end of the tripping sliding block and the electric leakage mechanism are arranged in a linkage mode, and the splicing needle is arranged close to the other end of the tripping sliding block; when the to-be-protected circuit leaks electricity, the electric leakage mechanism actuates and drives the tripping sliding block to push the assembling needle, so that the operating mechanism is switched off; first anti-falling bosses are arranged on the two opposite edges of the notch of the stroke groove, the tripping sliding block is provided with second anti-falling bosses located below the first anti-falling bosses, and the second anti-falling bosses are located below the first anti-falling bosses all the time in the sliding process of the tripping sliding block so that the tripping sliding block can be prevented from falling off from the notch of the stroke groove; the tripping mechanism has the characteristic that the tripping slide block is relatively stable.

Description

Technical Field

[0001] The present application relates to the field of low-voltage electrical equipment and is a small leakage circuit breaker. Background Art

[0002] Existing small leakage circuit breakers often include separate leakage electrodes and circuit breaker poles, which are spliced ​​and riveted together with the leakage electrode and the circuit breaker pole.

[0003] There is a leakage mechanism inside the leakage electrode, and there is an operating mechanism inside the circuit breaker pole. In order to associate the leakage mechanism with the operating mechanism, a tripping slider is set on the surface of the leakage electrode, and the assembly pin of the operating mechanism is inserted in the motion track of the tripping slider. When the leakage electrode is actuated (due to leakage), the movement of the leakage mechanism drives the tripping slider to slide and pushes the assembly pin to move, thereby tripping the circuit breaker pole, thereby completing the function of leakage tripping.

[0004] However, this structure also brings a problem. Since the trip slider is set on the surface of the leakage electrode and lacks some limiting structures, the trip slider is easy to fall off during the splicing process with the circuit breaker pole, causing unnecessary trouble for the workers in assembly. If the workers are careless and do not install the trip slider after it falls off, and directly splice the leakage electrode with the circuit breaker pole, such products will not be able to achieve the leakage protection function, and will be unqualified products during factory inspection, requiring rework, which invisibly wastes a lot of manpower and material resources.

[0005] Therefore, how to design a small leakage circuit breaker with a tripping slider setting that is more stable than the existing technology is a direction worthy of research. Summary of the invention

[0006] In view of this, the purpose of the present application is to overcome the deficiencies in the prior art and to provide a small leakage circuit breaker so that the tripping slider is arranged more stably.

[0007] The present application provides: a small leakage circuit breaker, which includes a leakage electrode and a circuit breaker pole; an operating mechanism is arranged on the circuit breaker pole, and an assembling pin of the operating mechanism extends from one side of the circuit breaker pole; the leakage electrode includes a leakage shell, a leakage mechanism and a tripping slider, and the leakage mechanism is arranged inside the leakage shell; a travel groove is opened on the surface of the leakage shell, and the tripping slider is slidably arranged in the travel groove, one end of the tripping slider is linked with the leakage mechanism, and the assembling pin is arranged near the other end of the tripping slider; when leakage occurs in the circuit to be protected, the leakage mechanism is actuated to drive the tripping slider to push the assembling pin, so that the operating mechanism is opened; a first anti-dropping boss is arranged on two opposite edges of the travel groove notch, and the tripping slider has a second anti-dropping boss located below the first anti-dropping boss, and the second anti-dropping boss is always located below the first anti-dropping boss during the sliding process of the tripping slider to prevent the tripping slider from falling off from the travel groove notch.

[0008] With this structure, since the first anti-dropout boss and the second anti-dropout boss are provided, the second anti-dropout boss is always located below the first anti-dropout boss. The first anti-dropout boss and the second anti-dropout boss can form a limit position to prevent the release slider from falling off the travel groove, thereby improving the stability of the product.

[0009] In an embodiment of the present application, an installation opening is provided on the second anti-detachment boss, and the size of the installation opening is larger than that of the first anti-detachment boss; when the tripping slider is installed, the first anti-detachment boss is inserted through the installation opening until the tripping slider is completely installed in the travel groove, and the installation opening and the first anti-detachment boss always maintain an offset setting.

[0010] The design of the mounting opening allows the tripping slider to be installed in the travel groove at an angle during installation, and the first anti-dropping boss is passed through the mounting opening to complete the installation. After the installation is completed, the mounting opening and the first anti-dropping boss are always staggered, thereby ensuring the stable installation of the tripping slider.

[0011] In an embodiment of the present application, the trip slider includes a straight portion and an inclined portion, the straight portion is connected to the inclined portion, and an obtuse angle is set between the two; one end of the straight portion away from the inclined portion is linked to the leakage mechanism, the assembly needle is located on the side of the inclined portion away from the straight portion, and the surface of the inclined portion used to push the assembly needle is a slope.

[0012] In an embodiment of the present application, the second anti-slip bosses are arranged on both sides of the straight portion.

[0013] In an embodiment of the present application, an abutment boss is provided in the travel groove, and the lower surface of the release slider is always in contact with the abutment boss during the sliding process of the release slider.

[0014] In an embodiment of the present application, the upper surface of the tripping slider is always lower than the notch of the travel groove.

[0015] In an embodiment of the present application, the leakage mechanism includes a coil device, a pull rod, a pull plate, a reset member and a reset spring; the pull plate is rotatably arranged on the leakage shell, the coil device is sleeved on the pull rod, one end of the pull rod is connected to the pull plate, and the pull plate and the straight part are arranged for synchronous movement; the reset member and the leakage shell are slidingly arranged, and the reset spring is arranged between the reset member and the leakage shell; a slot is arranged on the pull plate, and the lower part of the reset member is hooked in the slot, at which time the reset spring is in a deformed state and the reset member is located in the leakage shell; when the leakage mechanism is actuated, the coil device is energized to attract the pull rod to move in the direction of the coil device, pulling the pull plate to rotate, and the pull plate is released from the hook with the reset member, and the reset member protrudes from the upper surface of the leakage shell under the action of the spring to form a leakage indication.

[0016] In an embodiment of the present application, a driving boss is provided on the pull plate, a driving hole is provided on the straight portion, and the driving boss extends into the driving hole so that the pull plate and the straight portion form a linkage.

[0017] By adopting this structure, the linkage structure of the pull plate and the release slider is very simple and easy to assemble. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0019] Figure 1 A three-dimensional diagram of a small leakage circuit breaker according to an embodiment of the present application is shown;

[0020] Figure 2 A schematic diagram showing the installation of a tripping slider in an embodiment of the present application is shown;

[0021] Figure 3 A schematic diagram of the structure of a leakage housing in a small leakage circuit breaker in an embodiment of the present application is shown;

[0022] Figure 4 A schematic diagram of the structure of a tripping slider in a small leakage circuit breaker in an embodiment of the present application is shown;

[0023] Figure 5 A schematic diagram showing the structure of the small residual current circuit breaker in the embodiment of the present application when the circuit breaker is in a state of leakage;

[0024] Figure 6 A schematic diagram of the structure of the small leakage circuit breaker in the embodiment of the present application when there is no leakage;

[0025] Figure 7A schematic structural diagram of a leakage mechanism of a small leakage circuit breaker according to an embodiment of the present application is shown;

[0026] Figure 8 A schematic structural diagram of a pull plate of a leakage mechanism according to an embodiment of the present application is shown. DETAILED DESCRIPTION

[0027] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.

[0028] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0029] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of this application, "multiple" means two or more, unless otherwise clearly and specifically defined.

[0030] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0031] In the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature. Example

[0032] like Figure 1-Figure 8 As shown, the embodiment of the present application is a small leakage circuit breaker, which includes a circuit breaker pole 10 and a leakage electrode 20. The circuit breaker pole 10 here can also be called an open pole. In this embodiment, because the circuit breaker pole 10 is a single pole, the small leakage circuit breaker is a 1P+N circuit breaker. In addition, the circuit breaker pole 10 can also be multi-pole, such as a three-pole, and the corresponding small leakage circuit breaker is a 3P+N circuit breaker.

[0033] The circuit breaker pole 10 includes a circuit breaker housing and an operating mechanism disposed inside. The circuit breaker operating mechanism here is a four-link operating mechanism. When it is in a locked state, it relies on the engagement between the operating mechanism's trip buckle and the lock buckle to achieve a balance. When the lock buckle rotates, this engagement will be broken, so that the operating mechanism is transformed into an opening state, causing the circuit breaker pole 10 to trip. There are many ways to rotate the lock buckle here, one of which is to use the assembly pin 11 to move the lock buckle to rotate.

[0034] In this circuit breaker pole 10 , the assembly needle 11 is arranged beyond the circuit breaker housing, specifically, extends into the drain electrode 20 .

[0035] The leakage electrode 20 includes a leakage housing 21 , a leakage mechanism and a tripping slider 22 .

[0036] A travel groove 21 a is formed on the surface of the leakage housing 21 facing the circuit breaker, and a part of the assembling needle 11 is located in the travel groove 21 a .

[0037] The trip slider 22 is slidably disposed in the travel groove 21a, one end of the trip slider 22 is linked with the leakage mechanism, and the assembly needle 11 is disposed at the other end of the trip slider 22. Thus, when the leakage mechanism is actuated (when leakage occurs in the circuit to be protected), the leakage mechanism will cause the trip slider 22 to slide, drive the assembly needle 11 to move, and turn the operating mechanism into the opening state.

[0038] The tripping slider 22 includes a straight portion 22a and an inclined portion 22b, and the straight portion 22a is connected to the inclined portion 22b, and the two are set at an obtuse angle. The end of the straight portion 22a away from the inclined portion 22b is linked to the leakage mechanism, and the assembly needle 11 is located on the side of the inclined portion 22b away from the straight portion 22a, and the surface of the inclined portion 22b used to push the assembly needle 11 is a slope 22c. There are second anti-dropout bosses 22d on both sides of the straight portion 22a, and first anti-dropout bosses 21b are arranged on two opposite edges of the notch of the travel groove 21a. No matter where the tripping slider 22 slides, the first anti-dropout boss 21b is always above the second anti-dropout boss 22d, so that the tripping slider 22 can be prevented from falling off from the notch of the travel groove 21a.

[0039] In order to facilitate the installation of the tripping slider 22, the second anti-dropping protrusion 22d is provided with an installation opening 22e, and the size of the installation opening 22e is larger than the first anti-dropping protrusion 21b. In this way, when installing the tripping slider 22, the straight portion 22a can be slightly pressed to tilt the tripping slider 22 (when in the initial position, the tripping slider 22 is against the plane where the driving protrusion 25c is located), so that the first anti-dropping protrusion 21b is installed through the installation opening 22e, so that the driving hole 22a0 is sleeved on the driving protrusion 25c, and the tripping slider 22 is completely installed. At this time, since the installation opening 22e and the first anti-dropping protrusion 21b are always staggered, the tripping slider 22 will not fall off in the natural state (without external force).

[0040] An abutment boss 21c is provided in the travel groove 21a. The lower surface of the tripping slider 22 is always in contact with the abutment boss 21c during the sliding process of the tripping slider 22. The abutment boss 21c is also provided here to make it easier for the tripping slider 22 to restore to a parallel state by relying on the abutment boss 21c after being tilted and installed.

[0041] After the release slider 22 is installed, the upper surface of the release slider 22 is always lower than the notch of the travel groove 21a, so that the release slider 22 is not easy to generate friction with the circuit breaker housing, so that the release slider 22 can slide more smoothly.

[0042] The leakage mechanism is arranged inside the leakage housing 21. Here, the leakage mechanism includes a coil device 23, a pull rod 24, a pull plate 25, a reset member 26 and a reset spring 27. The pull plate 25 is rotatably arranged with the leakage mechanism through a pin shaft, and a through hole 25a is provided on the pull plate 25. The pull rod 24 is connected to the through hole 25a to form a linkage, so that when the pull rod 24 moves, the pull plate 25 can be driven to rotate, and when the pull plate 25 moves, the pull rod 24 can also be driven to move. The pull rod 24 is a moving iron core, which is inserted into the coil device 23. In this way, when the circuit to be protected leaks electricity, the coil device 23 is energized, and the pull rod 24 will be attracted to slide in the direction of the coil device 23, causing the pull plate 25 to rotate. The principle of the coil device 23 driving the pull rod 24 to move is referred to the principle of the working of the electromagnet, and will not be repeated here. The reset member 26 is slidably arranged on the leakage housing 21 in a vertical direction, and the reset member 26 has a first position beyond the leakage housing 21 and a second position retracted in the leakage housing 21. The reset spring 27 is arranged between the reset member 26 and the leakage housing 21. When the reset member 26 is in the second position, the reset spring 27 is in a deformed state. A slot 25b is arranged on the pull plate 25. When the reset member 26 is in the second position, the lower part of the reset member 26 is hooked in the slot 25b. When leakage occurs, due to the rotation of the pull plate 25, the pull plate 25 is released from the hook of the reset member 26, and the reset member 26 protrudes from the upper surface of the leakage housing 21 under the action of the spring to form a leakage indication.

[0043] There are various linkage modes between the pull plate 25 and the release slider 22. In this embodiment, the driving boss 25c and the driving hole 22a0 are used. The pull plate 25 is provided with a driving boss 25c, and the straight portion 22a is provided with a driving hole 22a0. The driving boss 25c extends into the driving hole 22a0, so that when the pull plate 25 rotates, the straight portion 22a can be driven to slide.

[0044] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples and features of different embodiments or examples described in this specification without contradiction.

[0045] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A small leakage circuit breaker, characterized in that: It comprises a leakage electrode and a circuit breaker pole; an operating mechanism is arranged on the circuit breaker pole, and an assembling pin of the operating mechanism extends from one side of the circuit breaker pole; the leakage electrode comprises a leakage shell, a leakage mechanism and a tripping slider, and the leakage mechanism is arranged inside the leakage shell; a travel groove is provided on the surface of the leakage shell, and the tripping slider is slidably arranged in the travel groove, one end of the tripping slider is linked with the leakage mechanism, and the assembling pin is arranged near the other end of the tripping slider; when leakage occurs in the circuit to be protected, the leakage mechanism is actuated to drive the tripping slider to push the assembling pin, so that the operating mechanism is opened; a first anti-dropping boss is arranged on two opposite edges of the notch of the travel groove, and the tripping slider has a second anti-dropping boss located below the first anti-dropping boss, and the second anti-dropping boss is always located below the first anti-dropping boss during the sliding process of the tripping slider to prevent the tripping slider from falling off from the notch of the travel groove.

2. A small leakage circuit breaker according to claim 1, characterized in that: The second anti-dropout boss is provided with an installation opening, and the size of the installation opening is larger than the first anti-dropout boss; when the release slider is installed, the first anti-dropout boss is installed through the installation opening until the release slider is completely installed in the travel groove, and the installation opening and the first anti-dropout boss always maintain a staggered setting.

3. A small leakage circuit breaker according to claim 2, characterized in that: The release slider includes a straight portion and an inclined portion, the straight portion is connected to the inclined portion, and an obtuse angle is set between the two; one end of the straight portion away from the inclined portion is linked to the leakage mechanism, the assembly needle is located on the side of the inclined portion away from the straight portion, and the surface of the inclined portion used to push the assembly needle is a slope.

4. A small leakage circuit breaker according to claim 3, characterized in that: The second anti-slip bosses are arranged on both sides of the straight portion.

5. A small leakage circuit breaker according to claim 3, characterized in that: An abutment boss is arranged in the travel groove, and the lower surface of the release slider is always in contact with the abutment boss during the sliding process of the release slider.

6. A small leakage circuit breaker according to claim 3, characterized in that: The upper surface of the tripping slide is always lower than the notch of the travel groove.

7. A small leakage circuit breaker according to claim 3, characterized in that: The leakage mechanism includes a coil device, a pull rod, a pull plate, a reset member and a reset spring; the pull plate is rotatably arranged on the leakage shell, the coil device is sleeved on the pull rod, one end of the pull rod is connected to the pull plate, and the pull plate and the straight part are arranged for synchronous movement; the reset member and the leakage shell are slidably arranged, and the reset spring is arranged between the reset member and the leakage shell; a slot is arranged on the pull plate, and the lower part of the reset member is hooked in the slot, at which time the reset spring is in a deformed state and the reset member is located in the leakage shell; when the leakage mechanism is actuated, the coil device is energized to attract the pull rod to move in the direction of the coil device, pulling the pull plate to rotate, the pull plate is released from the hook with the reset member, and the reset member protrudes from the upper surface of the leakage shell under the action of the spring to form a leakage indication.

8. A small leakage circuit breaker according to claim 7, characterized in that: The pull plate is provided with a driving boss, and the straight portion is provided with a driving hole. The driving boss extends into the driving hole so that the pull plate and the straight portion form a linkage.

Images