Remote mis-closing prevention structure of circuit breaker

Abstract

The application provides a remote mis-closing prevention structure of a circuit breaker, comprising a circuit breaker body, an electrically-conductive elastic component arranged in the circuit breaker body, a fixed branch of the elastic component being fixedly arranged and electrically contacting a first electric contact part of a circuit board, a toggle being capable of switching the first elastic branch of the elastic component between electrically contacting a second electric contact part and being separated from the second electric contact part, a handle being capable of switching a second elastic branch of the elastic component between electrically contacting a third electric contact part and being separated from the third electric contact part during switching operation of the handle, and the circuit board detecting electric signals between the first electric contact part and the second electric contact part and between the first electric contact part and the third electric contact part to confirm the current state and prevent remote mis-closing operation.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of circuit breakers, in particular to a remote mis-closing prevention structure of a circuit breaker. BACKGROUND

[0002] With the gradual realization of the intelligentization of power supply networks in China, the requirements of State Grid Corporation of China for power supply equipment are also increasingly intelligent. In the existing power supply network terminals, the most commonly used is still the traditional circuit breaker, and some intelligent power grid terminals use intelligent circuit breakers. In addition to the basic functions of short-circuit and overload tripping protection, intelligent circuit breakers also need to realize real-time monitoring of power consumption, collection of power consumption information, remote control of circuit breakers, and intelligent functions such as opening and closing operations of circuit breakers.

[0003] In the prior art, the structure for judging the opening and closing positions generally uses a micro switch, such as a handle that triggers the micro switch when closing to determine that it is in the closing position, and the micro switch is turned off to determine that it is in the opening position. The structure for switching between manual and automatic positions generally uses a dial switch. However, the micro switch and the dial switch are relatively large in size, making it difficult to further miniaturize the circuit breaker. SUMMARY

[0004] Therefore, the present application provides a remote mis-closing prevention structure of a circuit breaker, which has the characteristics of simple structure and low cost.

[0005] To achieve the above-mentioned purposes, the technical solutions provided by the present application are as follows:

[0006] A remote mis-closing prevention structure of a circuit breaker, comprising a circuit breaker body, the circuit breaker body having a handle for switching opening and closing, a dial for switching between manual and automatic positions, and a circuit board for electric control; the circuit board is provided with a first electrical contact, a second electrical contact and a third electrical contact; the circuit breaker body is further provided with an electrically conductive elastic component, the elastic component forms a fixed electrical connection with the first electrical contact, and forms a linkage connection with the handle and the dial respectively; when the dial is switched between the manual and automatic positions, the elastic component can be switched between the contact position of connecting the first electrical contact and the second electrical contact and the separation position of disconnecting the contact; when the handle is switched during the opening and closing operation, the elastic component can be switched between the contact position of connecting the first electrical contact and the third electrical contact and the separation position of disconnecting the contact; the circuit board confirms the current state by detecting the electrical signal between the first electrical contact and the second electrical contact and detecting the electrical signal between the first electrical contact and the third electrical contact.

[0007] Further, the elastic assembly has a fixed branch, a first elastic branch and a second elastic branch, the fixed branch is fixedly arranged and electrically contacts the first electric contact part; the first elastic branch extends to the position of the knob and forms linkage connection with the knob, when the knob switches between the manual position and the automatic position, the first elastic branch can switch between the contact position of electrically contacting the second electric contact part and the separation position of separating from the second electric contact part; the second elastic branch extends to the position of the handle and forms linkage connection with the handle, when the handle switches during the switching operation of opening and closing, the second elastic branch can switch between the contact position of electrically contacting the third electric contact part and the separation position of separating from the third electric contact part.

[0008] Further, the elastic assembly is a torsion spring assembly, comprising a first torsion spring unit and a second torsion spring unit, the coil part of the first torsion spring unit and the coil part of the second torsion spring unit are fixed, the first branch of the first torsion spring unit and the first branch of the second torsion spring unit are connected to form the fixed branch, the second branch of the first torsion spring unit extends to the position of the knob to form the first elastic branch, and the second branch of the second torsion spring unit extends to the position of the handle to form the second elastic branch.

[0009] Further, the outer shell of the circuit breaker body extends a fixed shaft column and a fixed shaft sleeve, the coil part of the first torsion spring unit is sleeved on the fixed shaft column; the coil part of the second torsion spring unit is sleeved on the fixed shaft sleeve, and the rotating shaft of the handle is sleeved in the fixed shaft sleeve.

[0010] Further, the torsion spring assembly is integrally prepared from a single metal wire.

[0011] Further, the knob is provided with an abutting boss, the first elastic branch extends to the position of the knob and abuts on the abutting boss by the elastic force of the first elastic branch, when the free end of the knob moves away from the first elastic branch, the free end of the first elastic branch is driven to move towards the second electric contact part and forms electrical contact with the second electric contact part; when the knob moves towards the free end of the first elastic branch, the first elastic branch is reset without the pressing force of the knob, thereby separating from the second electric contact part.

[0012] Further, the handle is provided with an abutting step, the second elastic branch extends between the abutting step and the third electric contact part, when the handle is pushed towards the third electric contact part, the second elastic branch is pressed down to electrically contact the third electric contact part by the abutting step; when the handle is pushed away from the third electric contact part, the second elastic branch is reset without the pressing of the abutting step, thereby separating from the third electric contact part.

[0013] Further, a hole is formed on the circuit board, the first electric contact part is a conductive ring arranged on the inner wall of the hole, and the fixed branch is fixedly arranged in the hole and electrically contacts with the conductive ring.

[0014] Further, the second electric contact part and the third electric contact part are both conductive columns arranged on the circuit board.

[0015] The technical scheme provided by the application has the following beneficial effects:

[0016] The circuit board detects the electric signal between the first electric contact part and the second electric contact part to confirm whether the current position is the automatic position or the manual position, and detects the electric signal between the first electric contact part and the third electric contact part to confirm whether the current position is the closed position or the open position. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 Fig. 1 shows the partial internal structure of the circuit breaker in the embodiment;

[0018] Fig. 2(a) shows the state of the anti-remote mis-closing structure of the circuit breaker in the embodiment; Figure 1 Fig. 2(b) shows the front view of the structure shown in Fig. 2(a);

[0019] Fig. 2(b) shows the front view of the structure shown in Fig. 2(a);

[0020] Figure 3 Fig. 2(b) shows the front view of the structure shown in Fig. 2(a);

[0021] Figure 4 Fig. 2(b) shows the front view of the structure shown in Fig. 2(a);

[0022] Figure 5 Fig. 2(b) shows the front view of the structure shown in Fig. 2(a); Figure 3

[0023] Figure 6 Fig. 2(b) shows the front view of the structure shown in Fig. 2(a);

[0024] Figure 7 Fig. 2(b) shows the front view of the structure shown in Fig. 2(a);

[0025] Figure 8 Fig. 2(b) shows the front view of the structure shown in Fig. 2(a);

[0026] Figure 9 ​As shown in the assembly diagram of the elastic component in the embodiment;

[0027] Figure 10 As shown in the partial circuit diagram in the embodiment. DETAILED DESCRIPTION

[0028] To further explain the embodiments, the present application provides the accompanying drawings. These drawings are part of the disclosure of the present application, which mainly serve to illustrate the embodiments, and can be explained in conjunction with the related description of the specification to explain the operating principle of the embodiments. Those of ordinary skill in the art should understand other possible implementations and advantages of the present application in conjunction with these. The components in the drawings are not drawn to scale, and similar component symbols are generally used to represent similar components.

[0029] The present application is further illustrated in conjunction with the accompanying drawings and specific embodiments.

[0030] Referring to Figures 1 to 9 As shown, the present embodiment provides a remote mis-closing prevention structure of a circuit breaker, specifically a remote mis-closing prevention structure of a small (miniature) circuit breaker, which includes a circuit breaker body 100, the circuit breaker body 100 having a handle 20 for switching on and off, a dial 10 for switching between manual position and automatic position, and a circuit board 11 for electric control; the circuit board 11 is provided with a first electric contact (not shown), a second electric contact 112 and a third electric contact 113; specifically, the first electric contact is located at the intermediate position between the second electric contact 112 and the third electric contact 113, i.e. the first electric contact is arranged in the jack 111 at the intermediate position between the second electric contact 112 and the third electric contact 113, the second electric contact 112 corresponds to the dial 10, and the third electric contact 113 corresponds to the handle 20.

[0031] The circuit breaker body 100 is further provided with an electrically conductive elastic component 30, which forms fixed electrical connection with the first electric contact and forms linkage connection with the handle 20 and the dial 10, respectively; specifically, in the present embodiment, the elastic component 30 has a fixed branch 31, a first elastic branch 32 and a second elastic branch 33, the fixed branch 31 is fixedly arranged and electrically contacts the first electric contact, so that the fixed branch 31 always electrically contacts the first electric contact.

[0032] The first elastic arm 32 extends to the position of the toggle 10 and is connected with the toggle 10 in linkage. When the toggle 10 is switched between the manual position and the automatic position, the elastic assembly 30 can be switched between the contact position of connecting the first electric contact and the second electric contact 112 and the separation position of disconnecting the contact; in particular, when the toggle 10 is switched between the manual position and the automatic position, the first elastic arm 32 can be switched between the contact position of electrically contacting the second electric contact 112 (i.e. connecting the first electric contact and the second electric contact 112) and the separation position of separating from the second electric contact 112 (i.e. disconnecting the contact); as shown in FIG. 2(a) and FIG. 2(b) of the embodiment, the toggle 10 is in the automatic position, and the first elastic arm 32 is in the separation position of separating from the second electric contact 112; when the toggle 10 is toggled from the automatic position to the manual position (i.e. toggled to the right on the basis of FIG. 2(a) and FIG. 2(b) to the position of Figure 5 ), the first elastic arm 32 is driven to electrically contact the second electric contact 112, at this time, the first electric contact and the second electric contact 112 are connected by the elastic assembly 30. When the toggle is toggled from the manual position to the automatic position (i.e. toggled to the left on the basis of Figure 5 , to the state of FIG. 2(a) and FIG. 2(b)), the first elastic arm 32 separates from the second electric contact 112, and the first electric contact and the second electric contact 112 are not connected. Of course, it can also be that the first electric contact and the second electric contact 112 are not connected when the toggle is toggled from the automatic position to the manual position, and are connected when the toggle is toggled from the manual position to the automatic position.

[0033] In particular, the second elastic arm 33 extends to the position of the handle 20 and is connected with the handle 20 in linkage. When the handle 20 is switched in the switching operation of opening and closing the switch, the elastic assembly 30 can be switched between the contact position of connecting the first electric contact and the third electric contact 113 and the separation position of disconnecting the contact; when the handle 20 is switched in the switching operation of opening and closing the switch, the second elastic arm 33 can be switched between the contact position of electrically contacting the third electric contact 113 (i.e. connecting the first electric contact and the third electric contact 113) and the separation position of separating from the third electric contact 113 (i.e. disconnecting the contact). As shown in FIG. 2 of the embodiment, the handle is in the open position, and the second elastic arm 33 is in the separation position of separating from the third electric contact 113; when the handle 20 is operated to close the switch (i.e. the handle 20 is toggled to the right on the basis of FIG. 2(a) and FIG. 2(b) to the position of Figure 4 ), the second elastic arm 33 is driven to electrically contact the third electric contact 113, at this time, the first electric contact and the third electric contact 113 are connected by the elastic assembly 30. When the handle 20 is operated to open the switch (i.e. the handle 20 is toggled to the left on the basis of Figure 4of course, it can be the opposite.

[0034] The circuit board 11 confirms the current state by detecting the electrical signal between the first electrical contact and the second electrical contact 112 and detecting the electrical signal between the first electrical contact and the third electrical contact 113. As in the specific embodiment, when the circuit board 11 detects that there is an electrical signal (such as voltage, current, etc.) between the first electrical contact and the second electrical contact 112, it indicates that it is in the manual position, that is, the state shown in FIG. 2(a) and FIG. 2(b). Figure 5 When no electrical signal is detected, it is in the automatic position, that is, the state shown in FIG. 2(a) and FIG. 2(b).

[0035] For example, when the circuit board 11 detects that there is an electrical signal between the first electrical contact and the third electrical contact 113, it indicates that it is in the closed position, that is, the state shown in FIG. 2(a) and FIG. 2(b). Figure 4 When no electrical signal is detected, it is in the open position, that is, the state shown in FIG. 2(a) and FIG. 2(b).

[0036] When in the automatic position, the circuit board 11 receives and executes the remote input on-off command, realizing normal remote control; when in the manual position, the circuit board 11 does not execute the remote input on-off command, and the remote misoperation is prevented. This control method is prior art and will not be described in detail here.

[0037] The large microswitch and dial switch are replaced by the cooperation of the small size structure (i.e. the elastic assembly 30 and the electrical contact on the circuit board 11) to realize the anti-remote misoperation structure of the circuit breaker, which greatly saves space and facilitates further miniaturization design of the circuit breaker; and the layout structure is simple and low in cost.

[0038] Specifically, in the embodiment, the circuit board 11 is a conventional circuit board structure, and the electrical signal detection circuit, control circuit and communication circuit integrated in the circuit board 11 are prior art, wherein the circuit principle diagram of the electrical signal detection circuit is shown in FIG. 3, S1 represents the on-off of the handle 20, and S2 represents the manual and automatic switching. Figure 10 The present scheme only realizes the cooperation with the elastic assembly 30 on the first electrical contact, the second electrical contact 112 and the third electrical contact 113 of the circuit board 11.

[0039] Further, the elastic assembly 30 is a torsion spring assembly integrally prepared from a single metal wire, which comprises a first torsion spring unit 34 and a second torsion spring unit 35, and the coil part of the first torsion spring unit 34 and the coil part of the second torsion spring unit 35 are both fixed. Specifically, the housing 1001 of the circuit breaker body 100 extends with a fixed shaft column 110 and a fixed shaft sleeve 120, and the coil part of the first torsion spring unit 34 is sleeved on the fixed shaft column 110; the coil part of the second torsion spring unit 35 is sleeved on the fixed shaft sleeve 120, and the assembly is simple. The rotating shaft of the handle 20 is sleeved in the fixed shaft sleeve 120.

[0040] The first branch arm of the first torsion spring unit 34 and the first branch arm of the second torsion spring unit 35 are connected (in an integrated connection structure in this embodiment) to jointly form the fixed branch arm 31, i.e., the fixed branch arm 31 is at the middle section of the metal wire; the second branch arm of the first torsion spring unit 34 extends to the position of the actuating piece 10 to form the first elastic branch arm 32, and the second branch arm of the second torsion spring unit 35 extends to the position of the handle 20 to form the second elastic branch arm 33; the free end (i.e., the outer end part) of the first elastic branch arm 32 and the free end of the second elastic branch arm 33 are the two outer end parts of the metal wire.

[0041] With this torsion spring assembly, the structure is simple, easy to prepare and form, and the assembly is simple and the action stroke is stable. Of course, in other embodiments, the torsion spring assembly can also be spliced from multiple metal wires, such as the first torsion spring unit 34 is prepared from a metal wire, and the second torsion spring unit 35 is prepared from another metal wire, and the first branch arm of the first torsion spring unit 34 and the first branch arm of the second torsion spring unit 35 are fixed by welding or other fixing means in the prior art. Alternatively, the elastic assembly 30 can also adopt other types of structures, such as using a "V"-shaped elastic sheet to replace it, the middle section of the "V"-shaped elastic sheet as the fixed branch arm 31, and the two end parts as the first elastic branch arm 32 and the second elastic branch arm 33, etc.

[0042] Further, in this embodiment, the specific cooperation mode of the actuating piece 10 and the first elastic branch arm 32 is as follows: referring to Fig. 2(b), Figure 4 and Figure 5As shown in FIG. 2(a), the toggle 10 is provided with an abutting boss 101, and the first elastic arm 32 extends to the position of the toggle 10 and abuts on the abutting boss 101 by the elastic force of the first elastic arm 32. When the free end of the toggle 10 away from the first elastic arm 32 moves, as shown in FIG. 2(b), the free end of the first elastic arm 32 moves to the left, and the toggle 10 moves to the right (in this embodiment, from the automatic position to the manual position). The free end of the first elastic arm 32 moves to the direction of the second electric contact 112 (i.e. downward) and forms an electric contact with the second electric contact 112. When the toggle 10 moves to the free end of the first elastic arm 32 (in this embodiment, from the manual position to the automatic position), the first elastic arm 32 is reset without the pressing force of the abutting boss 101 of the toggle 10, so as to be separated from the second electric contact 112. The matching structure of the first elastic arm 32 and the toggle 10 is simple, and the assembly operation is simple. Of course, in other embodiments, the assembly structure of the toggle 10 and the first elastic arm 32 is not limited to this.

[0043] Further, in this embodiment, the specific matching mode of the handle 20 and the second elastic arm 33 is as follows: Figure 4 and Figure 5 As shown in FIG. 2(b), the handle 20 is provided with an abutting step 201, and the second elastic arm 33 extends to the position between the abutting step 201 and the third electric contact 113. When the handle 20 is toggled to the direction of the third electric contact 113 (in this embodiment, from the open position to the closed position), the second elastic arm 33 is pressed to the third electric contact 113 by the abutting step 201 to form an electric contact. When the handle 20 is toggled away from the third electric contact 113 (in this embodiment, from the closed position to the open position), the second elastic arm 33 is reset without the pressing of the abutting step 201, so as to be separated from the third electric contact 113. The matching structure of the second elastic arm 33 and the handle 20 is simple, and the assembly operation is simple. Of course, in other embodiments, the assembly structure of the second elastic arm 33 and the handle 20 is not limited to this.

[0044] Further, in this embodiment, the circuit board 11 is provided with a plug hole 111, and the first electric contact is a conductive ring (not shown) arranged on the inner wall of the plug hole 111. The fixed arm 31 is fixedly arranged in the plug hole 111 and is in electric contact with the conductive ring. Thus, the fixed assembly of the fixed arm 31 is realized, specifically, the fixed assembly is detachable. The assembly structure is simple, and the disassembly operation is easy. When disassembled, it can be pulled out. Of course, in other embodiments, the fixed assembly mode of the fixed arm 31 is not limited to this, and the fixed arm 31 can be directly connected with the first electric contact by a non-detachable welding fixed mode.

[0045] Further, in the embodiment, the second electrical contact 112 and the third electrical contact 113 are both conductive posts protruding from the circuit board 11. The first elastic arm 32 and the second elastic arm 33 achieve electrical contact by abutting against the corresponding conductive posts, without limiting the travel of the first elastic arm 32 and the second elastic arm 33. Of course, in other embodiments, the structure of the second electrical contact 112 and the third electrical contact 113 is not limited thereto.

[0046] Although the present application has been particularly shown and described with respect to preferred embodiments thereof, it will be understood by those skilled in the art that various changes in form and details can be made therein without departing from the spirit and scope of the application as defined by the appended claims.

Claims

1. A remote mis-close prevention structure of a circuit breaker, characterized by: The circuit breaker comprises a circuit breaker body, a handle for switching on and off, a dial for switching between a manual position and an automatic position, and a circuit board for electric control; the circuit board is provided with a first electric contact, a second electric contact and a third electric contact; the circuit breaker body is further provided with an electrically-conductive elastic assembly, which forms fixed electric connection with the first electric contact and linkage connection with the handle and the dial respectively; When the dial is switched between the manual position and the automatic position, the elastic assembly can be switched between a contact position for connecting the first electric contact and the second electric contact and a separation position for disconnecting the contacts; When the handle is switched between on and off, the elastic assembly can be switched between a contact position for connecting the first electric contact and the third electric contact and a separation position for disconnecting the contacts; The circuit board confirms the current state by detecting the electric signal between the first electric contact and the second electric contact and detecting the electric signal between the first electric contact and the third electric contact.

2. The anti-remote reclosing structure of a circuit breaker according to claim 1, characterized in that: The elastic assembly comprises a fixed branch, a first elastic branch and a second elastic branch; the fixed branch is fixedly arranged and electrically contacts the first electric contact; the first elastic branch extends to the position of the dial and forms linkage connection with the dial; when the dial is switched between the manual position and the automatic position, the first elastic branch can be switched between a contact position for electrically contacting the second electric contact and a separation position for separating from the second electric contact; the second elastic branch extends to the position of the handle and forms linkage connection with the handle; when the handle is switched between on and off, the second elastic branch can be switched between a contact position for electrically contacting the third electric contact and a separation position for separating from the third electric contact.

3. The anti-remote reclosing structure of a circuit breaker according to claim 2, characterized in that: The elastic assembly is a torsion spring assembly, which comprises a first torsion spring unit and a second torsion spring unit; the coil of the first torsion spring unit and the coil of the second torsion spring unit are fixed; the first branch of the first torsion spring unit and the first branch of the second torsion spring unit are connected to form the fixed branch; the second branch of the first torsion spring unit extends to the position of the dial to form the first elastic branch; the second branch of the second torsion spring unit extends to the position of the handle to form the second elastic branch.

4. The anti-remote reclosing structure of a circuit breaker according to claim 3, characterized in that: The housing of the circuit breaker body extends a fixed shaft column and a fixed shaft sleeve; the coil of the first torsion spring unit is sleeved on the fixed shaft column; the coil of the second torsion spring unit is sleeved on the fixed shaft sleeve; the rotating shaft of the handle is sleeved in the fixed shaft sleeve.

5. The anti-remote reclosing structure of a circuit breaker according to claim 3, characterized in that: The torsion spring assembly is integrally prepared from a single metal wire.

6. The anti-remote reclosing structure of a circuit breaker according to any one of claims 2 to 5, characterized in that: The dial is provided with an abutting boss; the first elastic branch extends to the position of the dial and abuts on the abutting boss by its elastic force; when the free end of the dial moves away from the first elastic branch, the free end of the first elastic branch is driven to move towards the second electric contact and forms electric contact with the second electric contact; when the dial moves towards the free end of the first elastic branch, the first elastic branch is reset without the pressing force of the dial and separates from the second electric contact.

7. The anti-remote reclosing structure of a circuit breaker according to any one of claims 2 to 5, characterized in that: The handle is provided with a resisting step, the second elastic supporting arm extends to between the resisting step and the third electric contact part, when the handle is pushed towards the third electric contact part, the second elastic supporting arm is pressed down to electrically contact the third electric contact part through the resisting step, when the handle is pushed away from the third electric contact part, the second elastic supporting arm is reset without the pressing of the resisting step, so as to be separated from the third electric contact part.

8. The anti-remote reclosing structure of a circuit breaker according to claim 1 or 2, characterized in that: A hole is formed on the circuit board, the first electric contact part is a conductive ring arranged on the inner wall of the hole, and the elastic component is fixedly arranged in the hole and electrically contacts with the conductive ring.

9. The anti-remote reclosing structure of a circuit breaker according to claim 1, characterized in that: The second electric contact part and the third electric contact part are both conductive columns arranged on the circuit board.

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