Circuit breaker having closing counter

Abstract

The present invention relates to a circuit breaker having a closing counter, and more specifically, to a circuit breaker having a closing counter synchronized with an On operation. According to a circuit breaker having a closing counter according to one embodiment of the present invention, the counter operates in conjunction with a closing (On) operation of the circuit breaker, and thus can accurately count the number of times of the closing (On) operation in alignment with the closing timing.

Description

Circuit breaker with inrush counter

[0001] The present invention relates to a circuit breaker having a closing counter, and more particularly, to a circuit breaker having a closing counter synchronized to an On operation.

[0002] In general, a circuit breaker is an electrical device installed on a transmission or substation line or part of an electric circuit to protect electrical facilities and loads by switching the load or cutting off the circuit in the event of an accident such as a short circuit.

[0003] A circuit breaker is composed of a switching mechanism that enables opening and closing of the circuit, a detection mechanism that detects abnormal current, a trip mechanism that protects the line or load by opening the switching mechanism when an abnormal current such as an overcurrent or short-circuit current occurs, and an arc extinguishing mechanism that functions to extinguish and cool the arc generated during the breaking.

[0004] In particular, among circuit breakers, vacuum circuit breakers are a type of circuit breaker that is installed in high-voltage power systems to protect the power system by cutting off the circuit in the event of a dangerous situation such as a short circuit or overcurrent. They are designed to take advantage of their excellent insulation performance and arc extinguishing ability in a vacuum state.

[0005] A vacuum circuit breaker is a product that protects people and load equipment by shutting off the circuit in a vacuum arc manner through a vacuum interrupter (VI) inside the circuit breaker by an external separate relay when an abnormal current such as overcurrent, short circuit, or ground fault occurs in an extra-high voltage / high voltage distribution line.

[0006] Meanwhile, to ensure efficient circuit breaker maintenance, the number of times the circuit breaker is opened and closed must be counted. A counter is installed to display the number of times the circuit breaker is opened and closed, counting once each time it is turned on.

[0007] Figure 1 illustrates a vacuum circuit breaker according to the prior art. Only the main parts related to the present invention are illustrated.

[0008] The vacuum circuit breaker (10) includes a mechanical part (11) and a circuit part (50).

[0009] The mechanism (11) includes a mechanism assembly (20) and a motor assembly (13) installed within a mechanism frame (12). The motor assembly (13) is a device that provides driving force for charging an input spring (not shown), and the mechanism assembly (20) is a device that rotates a main shaft (40) for operating a movable part of a circuit unit (50) by utilizing the elastic restoring force of the input spring.

[0010] A perspective view of the mechanism assembly (20) and the motor assembly (13) is shown in Fig. 2. The motor assembly (13) is shown in Fig. 3, and the mechanism assembly (20) is shown in Fig. 4.

[0011] The motor assembly (13) includes a motor (14) and a gear unit (15). The gear unit (15) is composed of a plurality of gears, and an output gear hole (16) is formed in the output gear that is connected last.

[0012] The mechanism assembly (20) is provided with an on button (22) and an off button (21) for opening and closing the main circuit operating part, and a cam assembly (25) and a crank assembly (28) for operating the closing spring (not shown) are provided.

[0013] The cam assembly (25) is illustrated in Fig. 5. The camshaft (mechanical part shaft) (26) of the cam assembly (25) protrudes outside the side plate (23) of the mechanical part assembly (20) and is coupled to the output gear hole (16) of the motor assembly (13).

[0014] When control power is applied to the motor assembly (13) and the motor (14) rotates, the driving force of the motor (14) rotates the camshaft (26) coupled to the output gear hole (16) via the gear unit (15), thereby rotating the cam assembly (25), and in conjunction with this, the crank assembly (28) rotates to charge the input spring.

[0015] The cam assembly (25) is equipped with a camshaft (26) and a cam plate (27).

[0016] Meanwhile, a counter assembly (30) is provided on the other side plate (23) of the mechanism assembly (20). The counter assembly (30) is illustrated in Fig. 6.

[0017] The counter assembly (30) includes a counter (31) coupled to a counter bracket (32) and an operating lever (34) that operates a counter lever (33) of the counter (31).

[0018] The lever pin (35) of the operating lever (34) is operated by contacting the cam plate (27) of the cam assembly (25).

[0019] The mutual operation of the cam plate (27) and the counter assembly (30) is illustrated in Figs. 7a to 7c. Fig. 7a shows the discharge of the closing spring, i.e., the closing state of the circuit breaker, Fig. 7b shows the initial state of the closing spring's charging, and Fig. 7c shows the intermediate state of the closing spring's charging.

[0020] Referring to Fig. 7a, the lever pin (35) is in contact with the outer surface of the cam plate (27). When the cam assembly (25) rotates around the cam shaft (26), the lever pin (35) remains in place while maintaining contact along the outer surface of the cam plate (27).

[0021] As shown in Fig. 7b, the lever pin (35) rises when it passes through the cam groove (28) of the cam plate (27), and accordingly, the contact portion (36) provided on the head of the operating lever (34) also rises, releasing the restraint on the counter lever (33) and causing the counter lever (33) to rise.

[0022] Afterwards, as the cam plate (27) continues to rotate, the lever pin (35) leaves the cam groove (28) as shown in Fig. 7c, and the counter lever (33) descends, the contact portion (36) also descends, and accordingly, the counter lever (33) also descends. At this time, the counter (31) increases in number by 1. That is, since the movable portion of the circuit portion (50) is recognized as having operated, the number of the counter (31) increases by 1.

[0023] In this way, the conventional technology is designed to operate the counter in conjunction with the cam plate (27) that loads the input spring.

[0024] Strictly speaking, this is not linked to the closing operation of the circuit breaker, but to the loading operation of the closing spring. Since the counter is not counted when the operation is On, the user may perceive it as a counter error.

[0025] The present invention has been devised to solve the above-mentioned problem, and its purpose is to provide a vacuum circuit breaker having a counter that can accurately count the number of On operations by operating in conjunction with the On operation of the circuit breaker.

[0026] In addition, another object of the present invention is to provide an On counting device of a circuit breaker capable of counting the number of On operations during operation and transmitting driving force by buffering.

[0027] A circuit breaker having a counter according to one embodiment of the present invention includes: a main shaft connected to a main circuit; a mechanical assembly providing rotational force to the main shaft; a counter assembly having a counter lever fixedly connected to one side of the mechanical assembly and protruding toward the mechanical assembly; a shaft lever connected to a mechanical shaft penetrating the mechanical assembly; and a return spring having one end connected to the counter lever and the other end connected to the shaft lever.

[0028] The above mechanism shaft rotates at a predetermined angle during the injection operation.

[0029] The counter assembly includes a counter that displays the number of input operations; a counter bracket on which the counter is installed; and the counter lever.

[0030] The above counter bracket includes a first plate and a second plate that are formed by bending each other at a predetermined angle.

[0031] The above first plate is fixed to the side plate of the above mechanism assembly.

[0032] The above counter is installed in the above second plate.

[0033] The above return spring pulls the counter lever in the direction of the shaft lever when the tension between the shaft lever and the counter lever is greater than a predetermined amount.

[0034] A slip member is provided between the above return spring and the shaft lever.

[0035] A first ring portion that is hooked to the shaft lever is formed at one end of the slip member, and a second ring portion that is hooked to the counter lever is formed at the other end of the slip member.

[0036] The above shaft lever includes a body part formed in a ring shape, into which the mechanism shaft is coupled in a central hole; and a catch formed eccentrically on a portion of the body part.

[0037] The slip member is fitted into the above-mentioned stumbling block.

[0038] A support plate is provided at the end of the above-mentioned stumbling block to prevent the slip member from coming off.

[0039] A fixing ring is provided to fix and support the above shaft lever to the mechanism shaft.

[0040] A circular groove is formed on the shaft of the above mechanism into which the fixing ring is fitted.

[0041] According to a circuit breaker having a closing counter according to one embodiment of the present invention, the counter operates in conjunction with the closing (On) operation of the circuit breaker, so that the number of closing (On) operations can be accurately counted in accordance with the closing timing.

[0042] Therefore, the user does not perceive it as an error in the counter.

[0043] Additionally, the counter is connected to the mechanism shaft and acts directly, reducing the possibility of errors and breakdowns.

[0044] In addition, the configuration connecting the counter assembly and the mechanism shaft is simply composed of a shaft lever, a slip member, and a return spring, which reduces the possibility of defects and increases durability.

[0045] Fig. 1 is a perspective view of a vacuum circuit breaker according to the prior art.

[0046] Figure 2 is a perspective view of the mechanism assembly and motor assembly in Figure 1.

[0047] Figure 3 is a perspective view of the motor assembly in Figure 2.

[0048] Figure 4 is a perspective view of the mechanism assembly in Figure 2.

[0049] Figure 5 is a perspective view of the cam assembly in Figure 4.

[0050] Figure 6 is a perspective view of the counter assembly in Figure 1.

[0051] Figures 7a to 7c illustrate the operation of the counter assembly and the cam assembly.

[0052] Figure 8 is a perspective view of a vacuum circuit breaker according to one embodiment of the present invention.

[0053] Figures 9 and 10 are perspective views of the inside of the mechanism in Figure 8. Here, Figure 9 is in the On state, and Figure 10 is in the Off state.

[0054] Fig. 11 is a detailed drawing of the part in which the input counter is mounted in Fig. 8.

[0055] Figures 12 to 14 are perspective, front, and side views of the mechanism assembly.

[0056] Figures 15 and 16 are exploded perspective views of the counter assembly in Figure 11.

[0057] Figures 17a to 17c illustrate the operation of the counter assembly. Here, Figure 17a illustrates the ready-to-enter state, Figure 17b illustrates the intermediate-entering state, and Figure 17c illustrates the completed-entering state.

[0058] Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. However, this description is intended to be sufficiently detailed to enable those skilled in the art to easily practice the invention, and the technical concept and scope of the present invention are not intended to be limited by these drawings.

[0059] The terms “absence” or “part” used to refer to components in the present invention are not used for any limiting purpose and may be omitted.

[0060] A circuit breaker having a counter according to one embodiment of the present invention will be described in detail with reference to the drawings.

[0061] Fig. 8 is a perspective view of a vacuum circuit breaker according to one embodiment of the present invention. Figs. 9 and 10 are perspective views of the inside of the mechanism in Fig. 8. Fig. 9 is in the on state, and Fig. 10 is in the off state.

[0062] A circuit breaker having a counter according to one embodiment of the present invention is characterized by including: a main shaft (190) connected to a main circuit unit (110); a mechanical assembly (140) providing rotational force to the main shaft (190); a counter assembly (160) having a counter lever (164) fixedly connected to one side of the mechanical assembly (140) and protruding toward the mechanical assembly (140); a shaft lever (180) connected to a mechanical shaft (146) penetratingly installed in the mechanical assembly (140); and a return spring (165) having one end connected to the counter lever (164) and the other end connected to the shaft lever (180).

[0063] A circuit breaker according to one embodiment of the present invention may be a vacuum circuit breaker. The main parts of the vacuum circuit breaker are illustrated in Fig. 8. The vacuum circuit breaker (100) is configured to isolate the fixed contact and the movable contact inside the circuit breaker by the control power of a separately provided relay when an abnormal current, such as an overcurrent, a short circuit, or a ground fault occurs in an extra-high voltage / high voltage distribution line, thereby breaking the circuit.

[0064] Here, the fixed contact and the movable contact are provided in a vacuum interrupter (Vacuum Interrupter: VI). The vacuum interrupter operates in a vacuum arcing manner to quickly extinguish high-temperature and high-pressure arc and prevent the arc from leaking to the outside, thereby exhibiting excellent performance in protecting human life and load equipment.

[0065] The vacuum circuit breaker (100) includes a main circuit section (110) and a mechanism section (120).

[0066] The main circuit (110) is connected to the main circuit and is connected to a power source and a load. The rear of the main circuit (110) is provided with a first terminal (upper terminal) (114) connected to a power source and a second terminal (lower terminal) (115) connected to a load. Here, the first terminal (114) can be connected to a fixed contact (not shown) inside the vacuum interrupter, and the second terminal (115) can be connected to a movable contact (not shown) inside the vacuum interrupter.

[0067] The main circuit section (110) is provided for each phase of the circuit. For example, in the case of a three-phase circuit, three circuit sections (111, 112, 113) are provided for the R phase, S phase, and T phase. In the case of a vacuum circuit breaker, a vacuum interrupter is provided in each of the circuit sections (111, 112, 113), and a fixed contact and a movable contact are provided. In other words, a circuit breaker (fixed contact and movable contact) is provided for each phase.

[0068] The mechanism (120) includes a motor assembly (130) or a manual handle (139) for charging (charging) the input spring (148), a mechanism assembly (140) for transmitting a force (restoring force) applied by restoring (discharging) the input spring (148) to the main shaft (190), and an on / off button (126, 125) for causing an input or an opening action of the blocking part. (Here, the input spring (148) is illustrated in FIG. 13, etc.)

[0069] The motor assembly (130) includes a motor (132) and a gear unit (135) that provide driving force for charging the input spring (148).

[0070] The motor (132) is driven by a separately provided control power source to provide driving force for charging the input spring (148). A DC control motor can be used as the motor (132).

[0071] The gear unit (135) transmits the driving force of the motor (132) and is formed by connecting a plurality of gears. An output gear (136) is arranged at the end of the gear unit (135). The output gear (136) is arranged adjacent to the manual handle (139).

[0072] The output gear (136) is connected to the cam assembly (145) of the mechanism assembly (140). That is, the mechanism shaft (146) rotates by receiving power from the output gear (136) and rotates the cam assembly (145). (Regarding the detailed configuration and operation of the cam assembly, reference may be made to the description of the prior art.)

[0073] The cam assembly (145) is connected to the crank assembly (150) at the bottom and the main shaft (190) at the top. The crank assembly (150) rotates under the force of the cam assembly (145) and charges the input spring (148).

[0074] The cam assembly (145) is connected to the main shaft lever (192) of the main shaft (190) to rotate the main shaft (190).

[0075] The mechanism shaft (146) is installed in conjunction with the mechanism assembly (140) and the motor assembly (130). The mechanism shaft (146) is coupled to the cam assembly (145) of the mechanism assembly (140), the manual handle (139), and the output gear (136) of the motor assembly (130) to rotate.

[0076] The mechanism shaft (146) rotates by the power of the motor (132) of the motor assembly (130) or the power of the manual handle (139).

[0077] The mechanism shaft (146) can be rotated by a manual handle (139). A user can charge the input spring (148) by rotating the mechanism shaft (146) by repeatedly pulling the manual handle (139).

[0078] The mechanism shaft (146) rotates by the power of the motor (132) or the manual handle (139) to provide rotational force so that the input spring (148) is charged, and when the input spring (148) is in operation, it rotates at a predetermined angle (e.g., 90 degrees).

[0079] A main shaft (190) is installed behind the motor assembly (130) and the mechanism assembly (140). The main shaft (190) provides power to the blocking section of the main circuit section (110). Specifically, the main shaft (190) operates the movable contact of the main circuit section (110) through the shaft link (170) and the drive link (195).

[0080] A shaft link (170) is connected to the main shaft (190). In addition, a shaft lever (191) is provided on the main shaft (190). The shaft lever (191) protrudes radially from the main shaft (190). A shaft link (170) is axially connected to the shaft lever (191). Therefore, when the main shaft (190) rotates, the shaft link (170) can move in the up and down directions.

[0081] A shaft link (170) is provided. The shaft link (170) transmits the rotational force of the main shaft (190) to the drive link (195) to move the movable part of the main circuit unit (110).

[0082] The shaft link (170) has an upper connecting portion (171) that is axially connected to a shaft lever (191) fixed to a main shaft (190), and a lower connecting portion (172) that is axially connected to a drive link (195).

[0083] When the input spring (148) is discharged by the on button (126), the main shaft (190) rotates, and the rotation of the main shaft (190) causes the shaft link (170) to rise, thereby pulling up the drive link (195). The drive link (195) operates the movable part to put the main circuit part (110) into the input state.

[0084] Referring to Fig. 9, the On button (126) is operated, and when inserted, the main shaft (190) rotates clockwise and the shaft link (170) rises.

[0085] Referring to Fig. 10, the Off button (125) is operated and when opened, the main shaft (190) rotates counterclockwise and the shaft link (170) is lowered.

[0086] A drive link (195) is axially connected to the lower end of the shaft link (170). The drive link (195) moves up and down by the shaft link (170) to operate the movable contact.

[0087] When turned on, the driving force by the input spring (148) of the mechanism assembly (140) rotates the main shaft (190), and this rotational force operates the movable contact of the blocking part of the main circuit part (110) via the shaft link (170) and the driving link (195).

[0088] Fig. 11 is a detailed drawing of the portion where the input counter is installed in Fig. 8. Figs. 12 to 14 are a perspective view, a front view, and a side view of the mechanism assembly (140). Meanwhile, Figs. 15 and 16 are exploded perspective views of the counter assembly in Fig. 11.

[0089] The counter assembly (160) includes a counter (161), a counter bracket (162), and a counter lever (164). Meanwhile, the counter assembly (160) is connected to a shaft lever (180) and a slip member (187) provided on a mechanism shaft (146).

[0090] A counter bracket (162) for installing a counter (161) is provided on the side plate (141) of the mechanism assembly (140). The counter bracket (162) includes a first plate (162a) and a second plate (162b) that are formed by bending each other at a predetermined angle. For example, the first plate (162a) and the second plate (162b) may be formed at a 90 degree angle to each other.

[0091] Here, the first plate (162a) is fixed to the side plate (141) of the mechanism assembly (140). A plurality of first fastening holes (162a1) are formed in the first plate (162a) so as to be fastened to the side plate (141) by a fastening member.

[0092] A counter (161) is installed on the second plate (162b). A plurality of second fastening holes (162b1) are formed on the second plate (162b) by a fastening member, into which the counter (161) can be installed.

[0093] The counter (161) can be formed in a rectangular solid shape. A display unit (161a) is provided on the front of the counter (161) to display an increasing number when the counter is turned on.

[0094] A plurality of fastening holes (161c) are formed in the back plate (161b) of the counter (161) and fastened to the counter bracket (162).

[0095] A counter lever (164) is provided on one side of the counter (161). The counter lever (164) serves to increase the number of the counter (161). Each time the counter lever (164) is pulled, the number of the counter (161) increases by 1.

[0096] A return spring (165) is provided. One end of the return spring (165) is connected to the counter lever (164), and the other end of the return spring (165) is connected to the shaft lever (180). The return spring (165) forms tension between the shaft lever (180) and the counter lever (164), and when tension of a predetermined amount or greater is formed, the counter lever (164) is pulled in the direction of the shaft lever (180). The specific function of the return spring (165) will be described later.

[0097] A slip member (187) may be provided between the return spring (165) and the shaft lever (180). In this case, the other end of the return spring (165) is connected to the slip member (187).

[0098] A slip member (187) is provided between the shaft lever (180) and the return spring (165). A first ring portion (187a) is formed at one end of the slip member (187), and a second ring portion (187b) is formed at the other end of the slip member (187).

[0099] The first ring part (187a) is fitted into the catch (182) of the shaft lever (180), and the other end of the return spring (165) is fitted into the second ring part (187b).

[0100] The slip member (187) is formed of a metal material or a synthetic resin material. The surface of the slip member (187) is formed to be smooth. Accordingly, the first ring portion (187a) is slidably coupled to the shaft lever (180). When the shaft lever (180) rotates and the catch (182) rotates around the mechanism shaft (146), the slip member (187) moves along the catch (182). In a state where the second ring portion (187b) of the slip member (187) is pulled by the return spring (165), the first ring portion (187a) of the slip member (187) slides along the catch (182) of the shaft lever (180).

[0101] A support member (142) is provided to support the mechanism shaft (146). The support member (142) has the mechanism shaft (146) fitted into a through hole formed in the center thereof, and is coupled to a side plate (141) of the mechanism assembly (140) to support the mechanism shaft (146).

[0102] A bearing (not shown) that rotates and supports the mechanism shaft (146) may be provided inside the support member (142).

[0103] A shaft lever (180) is provided. The shaft lever (180) is provided at the end of the mechanism shaft (146) to provide force for operating the counter lever (164).

[0104] The shaft lever (180) has a body portion (181) formed in a ring shape and a catch (182) formed eccentrically on one side of the body portion (181). A support plate (183) is provided at the end of the catch (182).

[0105] The first ring portion (187a) of the slip member (187) is fitted into the stumbling block (182).

[0106] The body (181) of the shaft lever (180) is formed in a ring shape, and the mechanism shaft (146) is fitted into the central hole (181a).

[0107] When the mechanism shaft (146) rotates and the shaft lever (180) rotates around the mechanism shaft (146), the catch (182) also rotates around the mechanism shaft (146). The slip member (187) fitted to the catch (182) also rotates together with the catch (182). Since the catch (182) is formed eccentrically on the shaft lever (180), it moves in a manner of moving away from the counter lever (164), then approaching, and then moving away again. Accordingly, the tension of the return spring (165) provided between the counter lever (164) and the shaft lever (180) repeats increasing and decreasing.

[0108] A fixing ring (185) is provided to fix and support the shaft lever (180). The fixing rings (185) are provided on each of both sides of the body portion (181). A circumferential groove (146a) is formed in the mechanism portion shaft (146) so that the fixing rings (185) can be fixed to the mechanism portion shaft (146) to support the shaft lever (180). The fixing ring (185) is fitted into the circumferential groove (146a) to fix and support the body portion (181) of the shaft lever (180).

[0109] The operation of a circuit breaker having an input counter according to one embodiment of the present invention will be described.

[0110] Figures 17a to 17c illustrate the operation of the counter assembly. Here, Figure 17a illustrates the ready-to-inject state, Figure 17b illustrates the intermediate-injection state, and Figure 17c illustrates the complete-injection state.

[0111] Figure 17a shows a state in which the input spring (148) is charged. That is, it is in a state of standby for input. At this time, the catch (182) of the shaft lever (180) is located below the line connecting the axis center of the mechanism shaft (146) and the end of the counter lever (164).

[0112] The slip member (187) and the return spring (165) caught between the shaft lever (180) and the catch (182) of the shaft lever (180) are pulled to both sides by tension and are arranged in a straight line.

[0113] Fig. 17b shows a state in the middle of the injection. When the on button (126) is pressed, the injection spring (148) is released, and injection proceeds, the mechanism shaft (146) rotates clockwise. Accordingly, the shaft lever (180) coupled to the mechanism shaft (146) also rotates clockwise, and the catch (182) rotates around the axis of the mechanism shaft (146). The catch (182) of the shaft lever (180) passes along a line connecting the axis center of the mechanism shaft (146) and the end of the counter lever (164). The distance between the catch (182) and the end of the counter lever (164) increases, and the tension of the return spring (165) exceeds a set value to pull the counter lever (164) in the direction of the shaft lever (180). Accordingly, the shaft lever (180) rotates a predetermined angle, and the counter (161) indicates the number increased by 1.

[0114] Fig. 17c shows a state in which the insertion is completed. As the insertion operation progresses further, the mechanism shaft (146) rotates further in a clockwise direction. Accordingly, the shaft lever (180) coupled to the mechanism shaft (146) also rotates further in a clockwise direction, and the catch (182) rotates further around the axis of the mechanism shaft (146). The catch (182) of the shaft lever (180) is positioned higher than a line connecting the axis center of the mechanism shaft (146) and the end of the counter lever (164). The distance between the catch (182) and the end of the counter lever (164) decreases, and the tension of the return spring (165) decreases, so that the counter lever (164) and the shaft lever (180) return to their original positions.

[0115] Meanwhile, the function of the mechanism and main circuit during the injection operation is as follows.

[0116] When the user presses the on button (126) to operate the mechanism assembly (140), the closing spring (148) is energized to rotate the main shaft (190). When the main shaft (190) rotates, the shaft lever (191) protruding from the main shaft (190) also rotates, and the shaft link (170) connected to the main shaft (190) rises to pull up the drive link (195). The drive link (195) operates the movable part of the main circuit unit (110) to bring the main circuit unit (110) into the closing state.

[0117] Conversely, when the user presses the off button (125) to operate the mechanism assembly (140), the main shaft (190) rotates as the input spring is compressed. When the main shaft (190) rotates, the shaft lever (191) protruding from the main shaft (190) also rotates, and the shaft link (170) connected to the shaft lowers to pull down the drive link (195). The drive link (195) operates the movable part of the main circuit unit (110) to open the main circuit unit (110).

[0118] According to a circuit breaker having a closing counter according to one embodiment of the present invention, the counter operates in conjunction with the closing (On) operation of the circuit breaker, so that the number of closing (On) operations can be accurately counted in accordance with the closing timing.

[0119] Therefore, the user does not perceive it as an error in the counter.

[0120] Additionally, the counter is connected to the mechanism shaft and acts directly, reducing the possibility of errors and breakdowns.

[0121] In addition, the configuration connecting the counter assembly and the mechanism shaft is simply composed of a shaft lever, a slip member, and a return spring, which reduces the possibility of defects and increases durability.

[0122] The embodiments described above are illustrative of the best possible implementations of the present invention, and those skilled in the art will appreciate that various modifications and variations can be made without departing from the essential characteristics of the present invention. Therefore, these embodiments are not intended to limit the technical spirit of the present invention, but rather merely to illustrate it. Therefore, it should be understood that the scope of the technical spirit of the present invention is not limited by these embodiments. In other words, the scope of protection of the present invention should be interpreted by the following claims, and all technical ideas within a scope equivalent thereto should be interpreted as being included within the scope of the rights of the present invention.

[0123] [Explanation of symbols]

[0124] 110 main circuit

[0125] 120 Mechanical Department

[0126] 125 off button

[0127] 126 On Button

[0128] 130 motor assembly

[0129] 132 motor

[0130] 135 gear

[0131] 139 Manual Handle

[0132] 140 Mechanical Assembly

[0133] 146 Mechanical shaft

[0134] 148 Compression Spring

[0135] 150 crank assembly

[0136] 160 counter assembly

[0137] 161 counters

[0138] 162 Counter Bracket

[0139] 164 counter lever

[0140] 165 return spring

[0141] 180 shaft lever

[0142] 181 Body

[0143] 182 stumbling blocks

[0144] 183 Support plate

[0145] 185 fixed ring

[0146] 187 Slip Absence

Claims

1. Main shaft connected to the main circuit; A mechanical assembly that provides rotational force to the main shaft; A counter assembly having a counter lever fixedly connected to one side of the mechanism assembly and protruding toward the mechanism assembly; A shaft lever coupled to a mechanism shaft that is installed through the mechanism assembly; and A circuit breaker having a closing counter having a return spring, one end of which is connected to the counter lever and the other end of which is connected to the shaft lever.

2. A circuit breaker in accordance with paragraph 1, wherein the mechanism shaft has a closing counter that rotates at a predetermined angle during closing operation.

3. In paragraph 2, The above counter assembly, A counter that displays the number of insertion operations; A counter bracket on which the above counter is installed; and A circuit breaker having a closing counter including the above counter lever.

4. In the third paragraph, a circuit breaker having an input counter including a first plate and a second plate that are formed by bending each other at a predetermined angle, wherein the counter bracket is a circuit breaker.

5. In the fourth paragraph, the first plate is a circuit breaker having an input counter fixed to a side plate of the mechanism assembly.

6. A circuit breaker having an input counter in which the counter is installed on the second plate in the fourth paragraph.

7. A circuit breaker having a closing counter that pulls the counter lever in the direction of the shaft lever when the tension between the shaft lever and the counter lever is greater than a predetermined amount, in the first paragraph.

8. A circuit breaker having a closing counter in which a slip member is provided between the return spring and the shaft lever in the first paragraph.

9. A circuit breaker having a closing counter in which a first ring portion that is caught on the shaft lever is formed at one end of the slip member in the 8th paragraph, and a second ring portion that is caught on the counter lever is formed at the other end of the slip member.

10. In paragraph 8, The above shaft lever, A body formed in a ring shape with a central hole, the mechanism shaft being coupled to the central hole; and A circuit breaker having a closing counter including a catch formed eccentrically on a portion of the body.

11. A circuit breaker having an input counter in which the slip member is fitted into the stumbling block in the 10th paragraph.

12. A circuit breaker having an input counter in which a support plate for preventing the slip member from coming off is provided at the end of the stumbling block in the 10th paragraph.

13. A circuit breaker having a closing counter having a fixing ring for fixing and supporting the shaft lever to the mechanism shaft in the first paragraph.

14. A circuit breaker having an input counter in which a circular groove into which the fixing ring is fitted is formed on the shaft of the mechanism in the 13th paragraph.

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