Circuit breaker with indicating mechanism

Abstract

The utility model provides a circuit breaker with an indicating mechanism, and relates to the technical field of electrical equipment. The circuit breaker comprises a shell, an operating mechanism, a moving contact support, a moving contact, a static contact and a switching-on and switching-off indicating mechanism. The moving contact support is connected with the operating mechanism, and the operating mechanism can drive the moving contact to rotate through the moving contact support, so that the moving contact is in contact with or separated from the static contact. The switching-on and switching-off indicating mechanism comprises a rotating arm, a main shaft, a spring and an indicating window, and the indicating window is arranged on the shell wall of the shell. And the rotating arm is fixedly connected with the main shaft and is rotationally connected into the shell through the main shaft. The direct driving force applied to the switching-on and switching-off indication mechanism comes from the moving contact support, and the switching-on and switching-off indication mechanism has the advantage of being accurate in switching-on and switching-off indication. Even if the operating mechanism fails and the states of the button and the handle cannot reflect the switching-on and switching-off states, the switching-on and switching-off states of the circuit breaker can be accurately judged through the indication part of the switching-on and switching-off indication mechanism, so that the maintenance of the circuit breaker is facilitated.

Description

Technical Field

[0001] The present application relates to the technical field of electrical equipment, and in particular to a circuit breaker with an indicating mechanism. Background Art

[0002] Circuit breakers generally have overload and short circuit functions, as well as normal closing and opening functions. When a circuit breaker is short-circuited or the internal operating mechanism fails, the handle outside the circuit breaker housing is sometimes neither in the open state nor in the closed state. In this way, it is difficult to determine the closing and opening of the circuit breaker from the position of the handle, which affects safety during maintenance and is inconvenient for circuit breaker replacement and maintenance. Utility Model Content

[0003] The purpose of the present application is to provide a circuit breaker with an indicating mechanism, which can accurately determine the closing and opening states of the circuit breaker to facilitate maintenance of the circuit breaker.

[0004] The present application provides a circuit breaker with an indication mechanism, comprising a housing, an operating mechanism, a moving contact support, a moving contact, a stationary contact and a closing and opening indication mechanism. The moving contact support is connected to the operating mechanism, and the operating mechanism can drive the moving contact to rotate through the moving contact support so that the moving contact contacts or separates from the stationary contact. The closing and opening indication mechanism comprises a rotating arm, a main shaft, a spring and an indication window, and the indication window is arranged on the shell wall of the housing. The rotating arm is fixedly connected to the main shaft and is connected to the housing through the rotation of the main shaft. The contact portion of the rotating arm is located on the rotation path of the moving contact support, and the indication portion of the rotating arm can be opposite to the indication window. The spring is sleeved on the outer periphery of the main shaft, one end of the spring is connected to the housing, and the other end of the spring is connected to the rotating arm. The indication portion comprises a closing indication mark and an opening indication mark. When the circuit breaker performs an opening action, the moving contact support abuts against the contact portion, thereby pushing the contact portion to rotate around the main shaft toward a first direction, the indication portion synchronously follows the rotation, the opening indication mark is exposed at the indication window, and the spring torsional energy is stored. When the circuit breaker performs a closing action, the spring releases stored energy, and the contact portion and the indicating portion rotate around the main axis toward the second direction, so that the closing indication mark is exposed at the indicating window, and the first direction and the second direction are opposite directions to each other.

[0005] In the circuit breaker with indicator mark provided by the present application, the direct driving force of the closing and opening indicating mechanism is derived from the moving contact support. Since the moving contact support is directly connected to the moving contact, it can best reflect the current closing and opening state of the moving contact. Therefore, the indicating mechanism of the present application has the characteristic of accurate indication. Even if the operating mechanism fails and the state of the button and the handle cannot reflect the closing and opening state, the closing and opening state of the circuit breaker can be accurately judged through the indicating part of the closing and opening indicating mechanism. In addition, in the closing and opening indicating mechanism, the main shaft is fixedly connected to the rotating arm, and the spring is sleeved on the outer periphery of the main shaft, which is convenient for assembly.

[0006] In a possible design, the contact portion abuts against the moving contact support in the closed state. In this way, the indicating portion of the rotating arm can quickly respond to the movement change of the moving contact support, and it helps to install the closing and opening indicating mechanism in the circuit breaker housing in a compact manner, saving the installation space of the closing and opening indicating mechanism.

[0007] In a possible design, the housing includes an upper cover and a base that are interlocked. The base includes a bottom plate and a first mounting hole, and the first mounting hole extends toward the upper cover relative to the bottom plate. The main shaft includes a lower shaft, and the lower shaft is fixed to a side of the rotating arm close to the base. The spring is a cylindrical helical spring, and the spring is installed by relying on the first mounting hole, and the lower shaft is inserted into the central hole of the spring along the axial direction of the spring. One end of the spring is connected to the bottom of the first mounting hole, and the other end of the spring is connected to a side of the rotating arm close to the base.

[0008] The installation of the rotating arm, spring and main shaft on the base provided by this embodiment facilitates the assembly of the circuit breaker upper cover and the base. At the same time, it can be seen from the installation relationship between the rotating arm, main shaft, spring and base of the present application that in the present application, the spring is positioned by the first mounting hole, the main shaft and the rotating arm are positioned by the spring, the assembly of the rotating arm, main shaft and spring is relatively compact, the spring is not easy to fall off, and the reliability of the overall structure is good.

[0009] In a possible design, the main shaft further includes an upper shaft, which is coaxially arranged with the lower shaft and fixed to a side of the rotating arm close to the upper cover. A second mounting hole is arranged on a side of the upper cover facing the base, and the upper shaft is adapted to the second mounting hole.

[0010] According to the embodiment, a lower shaft is arranged on the side of the rotating arm close to the base, and an upper shaft is arranged on the side of the rotating arm close to the upper cover. In this way, the position of the rotating arm in the shell is determined along the direction from the base to the shell, which is conducive to maintaining the abutment between the contact portion of the rotating arm and the moving contact support, preventing the rotating arm from moving in the direction from the base to the shell, and avoiding the occurrence of poor contact between the contact portion of the rotating arm and the moving contact support.

[0011] In a possible design, the spring includes a spring body, a first pin and a second pin. The first pin is connected to one axial end of the spring body, and the second pin is connected to the other axial end of the spring body. The first pin extends along the axial direction of the spring body relative to the spring body, and the first pin deviates from the central axis of the spring, and the second pin extends toward the circumferential outer side of the spring relative to the spring body. A first positioning hole adapted to the first pin is provided on the bottom plate at the first mounting hole, and the first pin is plugged into the first positioning hole and positioned through the first positioning hole. A slot adapted to the second pin is provided on one side of the rotating arm facing the base, and the second pin is engaged with the slot.

[0012] According to the embodiment, when the spring is installed, the first pin of the spring can be inserted into the first positioning hole, so that the spring can be positioned and installed at the first installation hole. When the rotating arm is installed, the lower shaft of the rotating arm close to the base can be inserted into the spring hole, the card slot of the rotating arm close to the base is aligned with the second pin of the spring, and the card slot of the rotating arm is engaged with the second pin of the spring, so that the rotating arm and the main shaft can be assembled on the base.

[0013] In a possible design, along the axial direction of the spring, there is a gap between the rotating arm and the first mounting hole, and there is a gap between the lower shaft and the bottom plate.

[0014] According to the embodiment, when the rotating arm rotates, no frictional force that affects the rotation of the rotating arm is generated between the rotating arm and the end of the first mounting hole. No frictional force that affects the rotation of the rotating arm is generated between the lower shaft and the bottom plate. This helps to ensure the flexibility of the rotating arm and prevent the occurrence of jamming.

[0015] In a possible design, the contact portion includes a contact surface, which is an arc surface protruding toward the moving contact support, and the contact portion is in linear contact with the moving contact support through the contact surface.

[0016] The contact surface of the contact portion provided by this embodiment is set as an arc surface protruding toward the moving contact support, which can improve the contact reliability between the contact portion and the moving contact. In addition, the contact surface of the contact portion is in line contact with the moving contact support, and line contact has the advantages of better flexibility and less wear compared to surface contact.

[0017] In a possible design, the closing indication mark and the opening indication mark have different colors.

[0018] Through this implementation, the user can distinguish whether the circuit breaker is in the closed or open state according to the different colors, and the setting is relatively convenient.

[0019] In a possible design, there is a height difference between the closing indication mark and the opening indication mark, which facilitates the setting and distinction of different color marks.

[0020] In a possible design, the handle is generally located on a side of the circuit breaker housing for easy operation and observation, and the indicator window and the handle are located on the same side of the housing. In this way, it is also easier to distinguish the closing and opening states of the circuit breaker through the indicator window. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 Shown is a schematic diagram of the internal structure of a circuit breaker in a closed state provided in an embodiment of the present application.

[0022] Figure 2 Shown Figure 1The diagram shows the internal structure of the circuit breaker in the open state.

[0023] Figure 3 Shown Figure 2 Schematic diagram of the exploded structure of the circuit breaker at the swing arm installation.

[0024] Figure 4 For Figures 1 to 3 A schematic structural diagram of a circuit breaker upper cover matching the circuit breaker shown.

[0025] Figure 5 Shown is a schematic structural diagram of a spring in a circuit breaker provided in an embodiment of the present application.

[0026] Figure 6 The figure shows a structural schematic diagram of the combination of the rotating arm and the main shaft in the circuit breaker provided in the embodiment of the present application.

[0027] Figure 7 for Figure 2 The circuit breaker shown is a schematic diagram of the structure with the rotating arm and spring hidden.

[0028] Figure 8 for Figure 7 A partial enlarged view of point I in the middle.

[0029] The accompanying drawings are denoted as follows:

[0030] 1. Shell; 11. Upper cover; 111. Second mounting hole; 12. Base; 121. Bottom plate; 1211. First positioning hole; 122. First mounting hole;

[0031] 2. Operating mechanism; 21. Operating unit; 22. Linkage structure;

[0032] 3. Moving contact support;

[0033] 4. Moving contact;

[0034] 5. Static contact;

[0035] 6. Rotating arm; 61. Contact part; 62. Indicator part; 621. Closing indicator mark; 622. Opening indicator mark; 63. Card slot;

[0036] 7. Main shaft; 71. Lower shaft; 72. Upper shaft; 8. Spring; 81. Spring body; 82. First pin; 83. Second pin; 84. Center hole; 9. Indicator window. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0038] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of the application are only for the purpose of describing specific embodiments and are not intended to limit this application. The terms "including" and "having" and any variations thereof in the specification and claims and the accompanying drawings of this application are intended to cover non-exclusive inclusions.

[0039] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase "embodiments" in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0040] The term "and / or" in this article is only a description of the association relationship of the associated objects, indicating that there can be three relationships. For example, A and / or B can mean: A exists, A and B exist at the same time, and B exists. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0041] In addition, the terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects rather than to describe a specific order, and may explicitly or implicitly include one or more of the features.

[0042] In the description of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, the "connection" or "connection" of a mechanical structure may refer to a physical connection. For example, the physical connection may be a fixed connection, such as a fixed connection through a barrier member, such as a fixed connection through screws, bolts or other barrier members. The physical connection may also be a detachable connection, such as a mutual snap-on or snap-fit ​​connection. The physical connection may also be an integral connection, such as a connection formed by welding, bonding or integral molding. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0043] Figure 1 Shown is a schematic diagram of the internal structure of a circuit breaker in a closed state provided in an embodiment of the present application. Figure 2 Shown Figure 1 The diagram shows the internal structure of the circuit breaker in the open state. Figure 3 Shown Figure 2 Schematic diagram of the exploded structure of the circuit breaker at the swing arm installation.

[0044] Please refer to Figures 1 to 3 The circuit breaker with an indication mechanism provided in the present application comprises a housing 1, an operating mechanism 2, a moving contact support 3, a moving contact 4, a stationary contact 5 and a closing and opening indication mechanism. The moving contact support 3 is connected to the operating mechanism 2, and the operating mechanism 2 can drive the moving contact 4 to rotate through the moving contact support 3, so that the moving contact 4 contacts or separates from the stationary contact 5. The closing and opening indication mechanism comprises a rotating arm 6, a main shaft 7, a spring 8 and an indication window 9, and the indication window 9 is arranged on the shell wall of the housing 1. The rotating arm 6 is fixedly connected to the main shaft 7 and is rotatably connected to the housing 1 through the main shaft 7. The contact portion 61 of the rotating arm 6 is located on the rotation path of the moving contact support 3, and the indication portion 62 of the rotating arm 6 can be opposite to the indication window 9. The spring 8 is sleeved on the outer periphery of the main shaft 7, one end of the spring 8 is connected to the housing 1, and the other end of the spring 8 is connected to the rotating arm 6. The indication portion 62 comprises a closing indication mark 621 and an opening indication mark 622. When the circuit breaker performs an opening action, the moving contact support 3 abuts against the contact part 61, thereby pushing the contact part 61 to rotate around the main shaft 7 toward the first direction, and the indicating part 62 rotates synchronously, the opening indicating mark 622 is exposed at the indicating window 9, and the spring 8 twists and stores energy. When the circuit breaker performs a closing action, the spring 8 releases the stored energy, the contact part 61 and the indicating part 62 rotate around the main shaft 7 toward the second direction, so that the closing indicating mark 621 is exposed at the indicating window 9, and the first direction and the second direction are opposite directions to each other.

[0045] The operating mechanism 2 can be divided into two parts, one part is the operating part 21, and the other part is the linkage structure 22. The operating part 21 is located outside the housing 1 and is visible to the naked eye, so that the user can conveniently close and open the circuit breaker through the operating part 21. The common operating part 21 includes a button and a handle. The linkage structure 22 is located inside the housing 1 and is driven by the operating part 21 to perform corresponding closing and opening actions.

[0046] The moving contact support 3 is a connecting component between the operating mechanism 2 and the moving contact 4. On the one hand, the moving contact support 3 is connected to the operating mechanism 2 and is driven by the operating mechanism 2. On the other hand, the moving contact support 3 is fixedly connected to the moving contact 4, providing accurate position fixation for the moving contact 4, ensuring that the moving contact 4 can accurately move along a predetermined path inside the circuit breaker to perform closing and opening actions. Therefore, the moving contact support 3 is the part that can best reflect the action state of the moving contact 4.

[0047] In the closing and opening indication mechanism, the rotating arm 6 includes a contact portion 61 and an indication portion 62. The contact portion 61 and the indication portion 62 are components of the rotating arm 6, and the two are linked. The contact portion 61 is located on the rotation path of the moving contact support 3, so that when the moving contact 4 is opened, the moving contact support 3 abuts against the contact portion 61, thereby pushing the contact portion 61 to rotate around the main axis toward the first direction, and the indication portion 62 rotates synchronously, so that the opening indication mark 622 appears at the indication window 9. During the closing process, under the action of the spring force, the contact portion 61 and the indication portion 62 rotate around the main axis 7 toward the second direction, so that the closing indication mark 621 appears at the indication window 9.

[0048] In the switch-on / off indicating mechanism, it can be considered that one end of the spring 8 is relatively fixed to the housing 1, and the other end of the spring 8 is relatively fixed to the rotating arm 6. In this way, when the rotating arm 6 rotates, the end of the spring 8 connected to the rotating arm 6 is twisted with the rotation of the rotating arm 6, while the end of the spring 8 connected to the housing 1 is relatively stationary. In this way, the spring 8 will accumulate force during the twisting process, which serves as the reset force when the rotating arm 6 is reset.

[0049] In the switch-on / off indicating mechanism, the main shaft 7 is fixedly connected to the rotating arm 6. The main shaft 7 and the rotating arm 6 can be an integral component, and the spring 8 is sleeved on the outer periphery of the main shaft 7. In this way, the installation is more convenient.

[0050] In summary, the circuit breaker with indicator mark provided by the present application, wherein the direct driving force of the closing and opening indicating mechanism is derived from the moving contact support 3, and since the moving contact support 3 is directly connected to the moving contact 4, it can best reflect the current state of the moving contact 4, and therefore, the closing and opening indicating mechanism of the present application has the characteristic of accurate indication. Even if the operating mechanism 2 fails, and the state of the button and the handle cannot reflect the closing and opening state, the closing and opening state of the circuit breaker can be accurately judged by the indicating part 62 of the closing and opening indicating mechanism. In addition, in the closing and opening indicating mechanism, the main shaft 7 is fixedly connected to the rotating arm 6, and the spring 8 is sleeved on the outer periphery of the main shaft 7, and the assembly is relatively convenient.

[0051] It should be noted that Figures 1 to 3 This is only one embodiment provided by the present application, wherein the contact portion 61 and the indicator portion 62 are an integrated structure, but the present application is not limited thereto. In practical applications, the rotating arm 6 can have different structural forms. For example, the indicator portion 62 and the contact portion 61 constituting the rotating arm 6 can be two independent components, and the indicator portion 62 and the contact portion 61 can be fixedly connected. For another example, in Figures 1 to 3 In the given example, the rotating arm 6 is similar to an L-shaped structure. In some other embodiments of the present application, affected by the internal assembly space of the circuit breaker, the rotating arm 6 may also be a linear structure or other special-shaped structures.

[0052] It should also be noted that Figures 1 to 3 A circuit breaker of a specific structure is shown in FIG. , but the present application is not limited to Figures 1 to 3 In some other embodiments of the present application, the specific structures of the operating mechanism 2, the moving contact support 3, the moving contact 4, and the stationary contact 5 of the shown structure may vary depending on the specific application of the circuit breaker, and the present application does not impose any restrictions on this.

[0053] Please continue to refer to Figure 1 to Figure 2 In some embodiments of the present application, under the action of the spring 8, the contact portion 61 abuts against the moving contact support 3 in the closed state and also abuts against each other in the open state.

[0054] For more details, please refer to Figure 1 , the contact portion 61 abuts against the moving contact support 3 in the closed state. Thus, when the moving contact support 3 applies force toward the contact portion 61 of the rotating arm 6 during the opening, the rotating arm 6 can rotate immediately, and the opening indication mark 622 turns to the indication window 9 synchronously.

[0055] Please continue to refer to Figure 2 The contact portion 61 abuts against the moving contact support 3 in the open state. In this way, when closing the switch, the moving contact support 3 moves toward the side away from the rotating arm 6, and the spring 8, under the action of the reset force, causes the rotating arm 6 to rotate, and the closing indication mark 621 turns to the indication window 9 synchronously.

[0056] According to the rotation process of the rotating arm 6, it can be known that the contact portion 61 and the moving contact support 3 always maintain an abutting state. In this way, the indicating portion 62 of the rotating arm 6 can quickly respond to the movement changes of the moving contact support 3, and help to make the closing and opening indicating mechanism installed in the circuit breaker housing 1 more compact, saving the installation space of the closing and opening indicating mechanism.

[0057] Figure 4 For Figures 1 to 3 The schematic diagram of the structure of the circuit breaker upper cover matched with the circuit breaker shown in FIG. Figure 5 The figure shows a schematic diagram of the structure of a spring in a circuit breaker provided in an embodiment of the present application. Figures 1 to 5 In some embodiments of the present application, the housing 1 includes an upper cover 11 and a base 12 that are interlocked. The base 12 includes a bottom plate 121 and a first mounting hole 122, and the first mounting hole 122 extends toward the upper cover 11 relative to the bottom plate 121. The main shaft 7 includes a lower shaft 71, and the lower shaft 71 is fixed to the side of the rotating arm 6 close to the base 12. The spring 8 is a cylindrical coil spring, and the spring 8 is installed by relying on the first mounting hole 122, and the lower shaft 71 is inserted into the spring 8 along the axial direction of the spring 8. One end of the spring 8 is connected to the bottom of the first mounting hole 122, and the other end of the spring 8 is connected to the side of the rotating arm 6 close to the base 12.

[0058] Please continue to refer to Figures 1 to 5 Generally speaking, a circuit breaker includes an upper cover 11 and a base 12. Most of the movable parts inside the circuit breaker, such as the operating mechanism 2, the moving contact 4, the static contact 5, the arc extinguishing system, the tripping system, etc., are installed on the base 12. Generally, no movable parts are arranged on the upper cover 11, so as to facilitate the assembly of the circuit breaker.

[0059] In some embodiments of the present application, in order to facilitate the assembly of the circuit breaker, the rotating arm 6, the main shaft 7 and the spring 8 are also arranged on the base 12. Specifically, a first mounting hole 122 extending toward the upper cover 11 relative to the bottom plate 121 is provided on the base 12. During assembly, the cylindrical coil spring is first installed at the first mounting hole 122, and the spring 8 is positioned circumferentially by the first mounting hole 122. Then, the lower shaft 71 is inserted into the center hole 84 of the spring 8, and the lower shaft 71 is positioned circumferentially by the center hole 84 of the spring 8, so that the rotating arm 6, the spring 8 and the main shaft 7 are installed on the base 12.

[0060] It can be seen from the installation relationship between the rotating arm 6, the main shaft 7, the spring 8 and the base 12 of the present application that, in the present application, the spring 8 is positioned by means of the first mounting hole 122, the main shaft 7 and the rotating arm 6 are positioned by means of the spring 8, the assembly of the rotating arm 6, the main shaft 7 and the spring 8 is relatively compact, the spring 8 is not easy to fall off, and the reliability of the overall structure is good.

[0061] It can be understood that, in some embodiments of the present application, the first mounting hole 122 can be a cylindrical blind hole, but the structure of the first mounting hole 122 is not limited to a cylindrical blind hole.

[0062] It is understandable that in some embodiments of the present application, there is a certain gap between the circumference of the spring 8 and the hole wall of the first mounting hole 122. In this way, when the spring 8 is twisted, the friction between the spring 8 and the hole wall of the first mounting hole 122 is small.

[0063] It can be understood that in some embodiments of the present application, there is also a certain gap between the circumference of the lower shaft 71 and the spring 8, and the gap can ensure that the lower shaft 71 can rotate in the center hole 84 of the spring 8.

[0064] In some embodiments of the present application, the lower shaft 71 and the rotating arm 6 may be integrally injection molded; in other embodiments of the present application, the lower shaft 71 and the rotating arm 6 may also be fixedly connected by means of an interference fit of the shaft hole.

[0065] Please continue to refer to Figures 1 to 4In some embodiments of the present application, the main shaft 7 further includes an upper shaft 72, which is coaxially arranged with the lower shaft 71, and the upper shaft 72 is fixed to a side of the rotating arm 6 close to the upper cover 11. A second mounting hole 111 is provided on a side of the upper cover 11 facing the base 12, and the upper shaft 72 is adapted to the second mounting hole 111.

[0066] Specifically, in some embodiments of the present application, the main shaft 7 is divided into two parts, an upper shaft 72 and a lower shaft 71, and the rotating arm 6 can be rotatably connected to the base 12 by relying on the lower shaft 71. The main function of the upper shaft 72 is to axially position the rotating arm 6. Specifically, the lower shaft 71 is provided on the side of the rotating arm 6 close to the base 12, and the upper shaft 72 is provided on the side of the rotating arm 6 close to the upper cover 11, so that the position of the rotating arm 6 in the housing 1 along the direction from the base 12 to the upper cover 11 is determined, which is conducive to maintaining the contact portion 61 of the rotating arm 6 and the abutment between the moving contact support 3, preventing the rotating arm 6 from moving in the direction from the base 12 to the upper cover 11, and avoiding the occurrence of unreliable abutment between the contact portion 61 of the rotating arm 6 and the moving contact support 3.

[0067] It is understandable that the upper shaft 72 is coaxially arranged with the lower shaft 71 , and a second mounting hole 111 is provided on the side of the upper cover 11 facing the base 12 , and the upper shaft 72 is adapted to the second mounting hole 111 , so that the rotating arm 6 can rotate stably in the shell 1 .

[0068] Figure 6 The figure shows a structural schematic diagram of a combination of a rotating arm and a main shaft in a circuit breaker provided in an embodiment of the present application. Figure 7 for Figure 2 The schematic diagram of the circuit breaker shown is a schematic diagram of the structure after the rotating arm and spring are removed. Figure 8 for Figure 7 A partial enlarged view of point I in the middle.

[0069] Please combine Figure 3 , Figures 5 to 8 In some embodiments of the present application, the spring 8 includes a spring body 81, a first pin 82, and a second pin 83. The first pin 82 is connected to one axial end of the spring body 81, and the second pin 83 is connected to the other axial end of the spring body 81. The first pin 82 extends along the axial direction of the spring body 81 relative to the spring body 81, and the first pin 82 deviates from the central axis of the spring 8, and the second pin 83 extends toward the circumferential outer side of the spring 8 relative to the spring body 81. A first positioning hole 1211 adapted to the first pin 82 is provided on the bottom plate 121 at the first mounting hole 122, and the first pin 82 is plugged into the first positioning hole 1211 and positioned through the first positioning hole 1211. A slot 63 adapted to the second pin 83 is provided on the side of the rotating arm 6 facing the base 12, and the second pin 83 is engaged with the slot 63.

[0070] Combination Figure 3, Figure 5 , Figure 7 and Figure 8 Specifically, in some embodiments of the present application, the first pin 82 of the spring 8 extends axially along the spring body 81 relative to the spring body 81, and a first positioning hole 1211 adapted to the first pin 82 is provided on the bottom plate 121 at the first mounting hole 122. When the spring 8 is installed, the first pin 82 of the spring 8 can be inserted into the first positioning hole 1211, so that the spring 8 can be positioned and installed at the first mounting hole 122.

[0071] Please combine Figure 3 , Figure 5 and Figure 6 , the second pin 83 of the spring 8 extends outwardly from the spring body 81 toward the circumferential direction of the spring 8, and a slot 63 matching the second pin 83 is provided on the side of the rotating arm 6 facing the base 12. In this way, when the rotating arm 6 is installed, the lower shaft 71 of the rotating arm 6 close to the base 12 can be inserted into the central hole 84 of the spring 8, and the slot 63 of the rotating arm 6 close to the base 12 is aligned with the second pin 83 of the spring 8, and the slot 63 of the rotating arm 6 is engaged with the second pin 83 of the spring 8, so that the rotating arm 6 and the main shaft 7 can be assembled on the base 12.

[0072] Please combine Figure 3 , Figure 5 and Figure 6 In some embodiments of the present application, the second pin 83 of the spring 8 extends toward the circumferential outer side of the spring 8 relative to the spring body 81, and the length of the second pin 83 extending toward the circumferential outer side of the spring 8 relative to the spring body 81 can be set to be longer. In this way, the length of the slot 63 engaged with the second pin 83 is also longer, which facilitates the assembly of the rotating arm 6 and the spring 8.

[0073] It should be noted that Figure 5 Only one structural schematic diagram of the spring is provided. Based on practical applications, the spring 8 may also have other deformation structures. For example, the first pin 82 and the second pin 83 of the spring 8 both extend along the axial direction of the spring 8 .

[0074] Please combine Figure 5 , Figure 7 and Figure 8 It can be understood that the first pin 82 of the spring 8 deviates from the central axis of the spring 8, so that the spring 8 can be effectively twisted when the second pin 83 of the spring 8 rotates with the rotating arm 6.

[0075] Please combine Figure 7 and Figure 8It is understandable that the size of the first positioning hole 1211 is larger than the size of the first pin 82, so that the first pin 82 can be smoothly inserted into the first positioning hole 1211. The size of the first positioning hole 1211 should not be too large, so that the first positioning hole 1211 can fix the spring 8 when the spring 8 is twisted.

[0076] Please combine Figures 1 to 3 In some embodiments of the present application, along the axial direction of the spring 8, there is a gap between the rotating arm 6 and the first mounting hole 122, and there is a gap between the lower shaft 71 and the bottom plate 121. In this way, when the rotating arm 6 rotates, no friction force affecting the rotation of the rotating arm 6 is generated between the rotating arm 6 and the end of the first mounting hole 122. No friction force affecting the rotation of the rotating arm 6 is generated between the lower shaft 71 and the bottom plate 121. In this way, it helps to ensure the flexibility of the rotating arm 6 and prevent the occurrence of the jamming phenomenon.

[0077] Please refer to Figure 1 to Figure 2 In some embodiments of the present application, the contact portion 61 includes a contact surface, which is an arc surface protruding toward the moving contact support 3, and the contact portion 61 is in line contact with the moving contact support 3 through the contact surface.

[0078] Specifically, when the circuit breaker changes from the closed state to the open state, or from the open state to the closed state, the contact position between the contact portion 61 and the moving contact support 3 will change to a certain extent. The contact surface of the contact portion 61 is set as an arc surface protruding toward the moving contact support 3, which can improve the contact reliability between the contact portion 61 and the moving contact 4. In addition, the contact surface of the contact portion 61 is in line contact with the moving contact support 3, and compared with surface contact, line contact has the advantages of better flexibility and less wear.

[0079] Please refer to Figure 6 In some embodiments of the present application, the closing indicator 621 and the opening indicator 622 have different colors. The user can distinguish whether the circuit breaker is in the closing state or the opening state according to the different colors. Specifically, red and blue have better recognition. In some embodiments of the present application, red and blue can be used to distinguish the closing state from the opening state.

[0080] It is understandable that the closing indication mark 621 and the opening indication mark 622 can also be distinguished by other methods, such as letters, numbers, text, and graphics, and this application does not impose any limitation on this.

[0081] Please continue to refer to Figure 6 In some embodiments of the present application, there is a height difference between the closing indication mark 621 and the opening indication mark 622.

[0082] Specifically, based on the above, the closing indication mark 621 and the opening indication mark 622 are distinguished by different colors. Then, when printing different colors on the rotating arm 6, if the parts of the rotating arm 6 where the different color marks are printed are of the same height, then during printing, the blue mark is likely to be printed on the red mark area, thus increasing the workload of subsequent repairs. Therefore, the closing indication mark 621 and the opening indication mark 622 have a height difference, which is convenient for setting and distinguishing different color marks.

[0083] Please continue to refer to Figures 1 to 3 In some embodiments of the present application, the operating mechanism 2 includes a handle, and the indication window 9 and the handle are located on the same side of the housing 1 .

[0084] Specifically, the handle is generally located on a side of the circuit breaker housing 1 for easy operation and observation, and the indicator window 9 and the handle are located on the same side of the housing 1 . This makes it easier to distinguish the closing and opening states of the circuit breaker through the indicator window 9 .

Claims

1. A circuit breaker with an indicating mechanism, characterized in that: It includes a housing, an operating mechanism, a moving contact support, a moving contact, a static contact and a closing and opening indicating mechanism; The movable contact support is connected to the operating mechanism, and the operating mechanism can drive the movable contact to rotate through the movable contact support, so that the movable contact contacts or separates from the stationary contact; The switch-on / off indication mechanism comprises a rotating arm, a main shaft, a spring and an indication window, and the indication window is arranged on the shell wall of the shell; The rotating arm is fixedly connected to the main shaft and is rotatably connected to the housing through the main shaft; the contact portion of the rotating arm is located on the rotation path of the movable contact support, and the indicating portion of the rotating arm can be opposite to the indicating window; The spring is sleeved on the outer circumference of the main shaft, one end of the spring is connected to the housing, and the other end of the spring is connected to the rotating arm; The indication part includes a closing indication mark and an opening indication mark; When the circuit breaker performs an opening action, the moving contact support abuts against the contact portion, thereby pushing the contact portion to rotate around the main axis toward the first direction, the indicating portion rotates synchronously, the opening indication mark is exposed at the indicating window, and the spring is twisted and stores energy; When the circuit breaker performs a closing action, the spring releases stored energy, and the contact portion and the indicating portion rotate around the main axis toward the second direction, so that the closing indication mark is exposed at the indicating window, and the first direction and the second direction are opposite to each other.

2. The circuit breaker according to claim 1, characterized in that: Under the action of the spring, the contact portion abuts against the moving contact support.

3. The circuit breaker according to claim 1 or 2, characterized in that: The housing comprises an upper cover and a base which are buckled together; The base comprises a bottom plate and a first mounting hole, wherein the first mounting hole extends relative to the bottom plate toward the upper cover; The main shaft includes a lower shaft, and the lower shaft is fixed to a side of the rotating arm close to the base; The spring is a cylindrical coil spring, which is installed by relying on the first mounting hole, and the lower shaft is inserted into the center hole of the spring along the axial direction of the spring; one end of the spring is connected to the bottom of the first mounting hole, and the other end of the spring is connected to the side of the rotating arm close to the base.

4. The circuit breaker according to claim 3, characterized in that: The main shaft further comprises an upper shaft, which is coaxially arranged with the lower shaft and fixed to a side of the rotating arm close to the upper cover; A second mounting hole is provided on one side of the upper cover facing the base, and the upper shaft is matched with the second mounting hole.

5. The circuit breaker according to claim 4, characterized in that: The spring comprises a spring body, a first pin and a second pin; The first pin is connected to one axial end of the spring body, and the second pin is connected to the other axial end of the spring body; The first pin extends in the axial direction of the spring body relative to the spring body, and the first pin deviates from the central axis of the spring, and the second pin extends outward in the circumferential direction of the spring relative to the spring body; A first positioning hole adapted to the first pin is provided on the bottom plate at the first mounting hole, and the first pin is plugged into the first positioning hole and positioned through the first positioning hole; A slot adapted to the second pin is formed on one side of the rotating arm facing the base, and the second pin is engaged with the slot.

6. The circuit breaker according to claim 5, characterized in that: Along the axial direction of the spring, there is a gap between the rotating arm and the first mounting hole, and there is a gap between the lower shaft and the bottom plate.

7. The circuit breaker according to claim 1, characterized in that: The contact portion comprises a contact surface, which is an arc surface protruding toward the moving contact support, and the contact portion is in linear contact with the moving contact support through the contact surface.

8. The circuit breaker according to claim 1, characterized in that: The closing indication mark and the opening indication mark have different colors.

9. The circuit breaker according to claim 8, characterized in that There is a height difference between the closing indication mark and the opening indication mark.

10. The circuit breaker according to claim 1, characterized in that The operating mechanism comprises a handle, and the indication window and the handle are located on the same side of the housing.

Images