circuit breaker

Abstract

To provide a circuit breaker which can easily grip a position of a terminal fitting at the current point.SOLUTION: A circuit breaker comprises: a first right electrode display part 34B for displaying that a first terminal member 10 is positioned at a first position; and a second right electrode display part 34A for displaying that the first terminal member 10 is positioned at a second position. The circuit breaker comprises: a right electrode display body 31 that can be moved between a first display position where the first right electrode display part 34B is exposed to a front surface of a main body case 2 and a second display position where the second right electrode display part 34A is exposed, in accordance with the movement of the first terminal member 10; a first left electrode display part 38A for displaying that a second terminal member 20 is positioned at a second position; and a second left electrode display part 38B for displaying that the second terminal member 20 is positioned at a third position. The circuit breaker is provided with a left electrode display body 35 that can be moved between a third display position where the first left electrode display part 38A is exposed to the front surface of the main body case 2 and a fourth display position where the second left electrode display part 38B is exposed, in accordance with the movement of the second terminal member 20.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a circuit breaker that is installed in, for example, a distribution board. [Background technology]

[0002] Conventionally, in circuit breakers used in, for example, single-phase three-wire circuits, the power supply terminals are sometimes configured as so-called plug-in terminals. Furthermore, as such circuit breakers, there have been devised ones in which the positions of the terminal fittings on the power supply terminals can be changed from outside the main body case (for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2001-35341 Summary of the Invention [Problem to be solved by the invention]

[0004] However, the circuit breaker described in Patent Document 1 has a problem in that it is difficult to determine the current position of the terminal fittings, which makes it difficult to use, for example, leading to the risk of incorrect wiring of cables when installing the circuit breaker in a distribution board.

[0005] SUMMARY OF THE INVENTION The present invention has been made in consideration of the above problems, and aims to provide a circuit breaker that allows the current position of the terminal fitting to be easily grasped. [Means for solving the problem]

[0006] In order to achieve the above object, the present invention provides a circuit breaker in which any two of three terminal ports, an upper terminal port, a central terminal port, and a lower terminal port, into which a conductive bar can be inserted and connected, can be arranged in a vertical direction in a main body case, and a first terminal member having a terminal fitting and into which the conductive bar can be inserted and connected is provided in the main body case so as to be movable in a vertical direction between a first position corresponding to the upper terminal port and a second position corresponding to the central terminal port, and a second terminal member having a terminal fitting and into which the conductive bar can be inserted and connected is provided below the first terminal member. and aligned with the first terminal member in the vertical direction, The terminal member is provided so as to be movable in the vertical direction between the second position and a third position corresponding to the lower terminal port, and the upper terminal port and the central terminal port are formed by positioning the first terminal member at the first position and the second terminal member at the second position, respectively, the upper terminal port and the lower terminal port are formed by positioning the first terminal member at the first position and the second terminal member at the third position, respectively, and the central terminal port and the lower terminal port are formed by positioning the first terminal member at the second position and the second terminal member at the third position, respectively, while a first pole indicating that the first terminal member is at the first position The terminal device is characterized in that it is provided with a first pole indicator, which is movable between a first indicator position where the first pole indicator is exposed on the surface of the main body case and a second indicator position where the second pole indicator is exposed as the first terminal member moves, a third pole indicator, which is movable between a third indicator position where the third pole indicator is exposed on the surface of the main body case and a fourth indicator position where the second terminal member is exposed as the second terminal member moves, and a second pole indicator, which is movable between a third indicator position where the third pole indicator is exposed on the surface of the main body case and a fourth indicator position where the fourth pole indicator is exposed as the second terminal member moves. [Effects of the Invention]

[0007] According to the present invention, a first terminal member having a terminal fitting and capable of being connected by inserting a conductive bar is provided on the main body case so as to be movable in the vertical direction between a first position corresponding to the upper terminal port and a second position corresponding to the central terminal port, and a second terminal member having a terminal fitting and capable of being connected by inserting a conductive bar is provided below the first terminal member. and aligned with the first terminal member in the vertical direction, The terminal fitting is movable vertically between a second position and a third position corresponding to the lower terminal port, and includes a first pole indicator that indicates when the first terminal member is in the first position and a second pole indicator that indicates when the first terminal member is in the second position, and the first pole indicator is movable between the first position where the first pole indicator is exposed on the surface of the main body case and the second position where the second pole indicator is exposed as the first terminal member moves, a third pole indicator that indicates when the second terminal member is in the second position, and a fourth pole indicator that indicates when the second terminal member is in the third position, and the second pole indicator is movable between the third position where the third pole indicator is exposed on the surface of the main body case and the fourth position where the fourth pole indicator is exposed as the second terminal member moves. This makes it easy to grasp the current position of the terminal fitting, facilitating various operations such as installation in a distribution board. [Brief explanation of the drawings]

[0008] [Figure 1] 1 is a perspective explanatory view showing a circuit breaker in which terminal ports P1 and P3 are configured at the power supply side terminal. FIG. [Figure 2] 2 is an explanatory perspective view showing the inner surface of the rear part of the main body case of the circuit breaker in the state shown in FIG. 1, viewed from the left rear. [Figure 3] 2 is an explanatory perspective view showing the inner surface of the rear part of the main body case of the circuit breaker in the state shown in FIG. 1, viewed from the right rear. [Figure 4] 2A and 2B are explanatory views showing the support of the circuit breaker in the state of FIG. 1 from the side, with FIG. 2A showing the support from the left side and FIG. 2B showing the support from the right side. [Figure 5] 1 is a perspective explanatory view showing a circuit breaker in which terminal ports P1 and P2 are configured at the power supply side terminal. FIG. [Figure 6]6A and 6B are explanatory perspective views showing the support body of the circuit breaker in the state of FIG. 5, in which (a) is shown from the rear left and (b) is shown from the rear right. [Figure 7] 1 is a perspective explanatory view showing a circuit breaker in which terminal ports P2 and P3 are configured at the power supply side terminal. FIG. [Figure 8] 8A and 8B are explanatory perspective views showing the support body of the circuit breaker in the state of FIG. 7, in which FIG. 8A is a view from the rear left and FIG. 8B is a view from the rear right. [Figure 9] 1A to 1C are explanatory diagrams showing the polar representation of a circuit breaker, where (a) shows the state of FIG. 1, (b) shows the state of FIG. 5, and (c) shows the state of FIG. 7. DETAILED DESCRIPTION OF THE INVENTION

[0009] Hereinafter, a circuit breaker according to an embodiment of the present invention will be described in detail with reference to the drawings.

[0010] FIG. 1 is an explanatory perspective view showing a circuit breaker 1 in which terminal ports P1 and P3 are formed at the power supply side terminals 4. FIG. 2 is an explanatory perspective view showing the inner rear surface of the main body case 2 of the circuit breaker 1 in the state shown in FIG. 1 from the rear left. FIG. 3 is an explanatory perspective view showing the inner rear surface of the main body case 2 of the circuit breaker 1 in the state shown in FIG. 1 from the rear right. FIG. 4 is an explanatory side view of the support body 41 of the circuit breaker 1 in the state shown in FIG. 1, with (a) showing the left side and (b) showing the right side. FIG. 5 is an explanatory perspective view showing a circuit breaker 1 in which terminal ports P1 and P2 are formed at the power supply side terminals 4. FIG. 6 is an explanatory perspective view showing the support body 41 of the circuit breaker 1 in the state shown in FIG. 5, with (a) showing the left side and (b) showing the right side. FIG. 7 is an explanatory perspective view showing a circuit breaker 1 in which terminal ports P2 and P3 are formed at the power supply side terminals 4. Fig. 8 is an explanatory perspective view showing the support 41 of the circuit breaker 1 in the state shown in Fig. 7, (a) from the rear left and (b) from the rear right. Fig. 9 is an explanatory view showing the polar designations of the circuit breaker 1, (a) showing the state shown in Fig. 1, (b) showing the state shown in Fig. 5, and (c) showing the state shown in Fig. 7.

[0011] A circuit breaker 1 used in a single-phase three-wire electrical circuit has a synthetic resin main body case 2 assembled from multiple case members, with a power supply terminal 4 at the rear and a load terminal (not shown) at the front of the main body case 2. A handle 5 is provided on the top surface of the main body case 2 so that it can be rotated back and forth, and rotating the handle 5 activates an opening / closing mechanism (not shown) built into the main body case 2, which connects or disconnects the electrical circuit electrically connecting the power supply terminal 4 and the load terminal.

[0012] Furthermore, the power supply side terminal 4 has a first terminal member 10 and a second terminal member 20. The first terminal member 10 and the second terminal member 20 are provided so as to be movable up and down on the rear surface of the main body case 2. When the first terminal member 10 is positioned at a first position which is on the upper side of the rear surface of the main body case 2, the first terminal member 10 at the first position becomes a plug-in type terminal port P1 into which a conductive bar (not shown) can be inserted and connected, when the first terminal member 10 or the second terminal member 20 is positioned at a second position which is the center in the up and down direction of the rear surface of the main body case 2, the first terminal member 10 or the second terminal member 20 at the second position becomes a plug-in type terminal port P2 (shown in FIGS. 5 and 7) into which a conductive bar (not shown) can be inserted and connected, and when the second terminal member 20 is positioned at a third position which is on the lower side of the rear surface of the main body case 2, the second terminal member 20 at the third position becomes a plug-in type terminal port P3 into which a conductive bar (not shown) can be inserted and connected. Furthermore, in such a power supply side terminal 4, the upper terminal port P1 is the neutral terminal (N pole), the central terminal port P2 and the lower terminal port P3 are each voltage terminals (terminal port P2 is the L1 pole, and terminal port P3 is the L2 pole), and when the input voltage is 100V, conductive bars are connected to the upper terminal port P1 and the central terminal port P2 or the lower terminal port P3, while when the input voltage is 200V, conductive bars are connected to the central terminal port P2 and the lower terminal port P3.

[0013] Here, we will explain the sliding structure of the first terminal member 10 and the second terminal member 20 at the power supply side terminal 4 of the circuit breaker 1, which is a key part of the present invention, and the pole display parts 34, 38 that display the positions of the first terminal member 10 and the second terminal member 20, and ultimately the polarity of the power supply side terminal 4. The first terminal member 10 includes two clamping bodies 11A, 11B arranged side by side at a predetermined interval in the vertical direction, an operating piece 12 connecting the clamping bodies 11A, 11B at the right front end of the clamping bodies 11A, 11B, a positioning piece 13 connecting the clamping bodies 11A, 11B at the left front end of the clamping bodies 11A, 11B, and terminal fittings 14, 14 exposed on the opposing surfaces of the clamping bodies 11A, 11B (the lower surface of the clamping body 11A and the upper surface of the clamping body 11B). The operating piece 12 is formed in a columnar shape extending vertically, and its upper surface is inclined downward toward the front, so that it functions as an operating surface 12A for operating a right pole indicator 31, as described below. The positioning piece 13 is also formed in a columnar shape extending vertically, and its left surface is provided with a positioning protrusion 15 protruding leftward.

[0014] The second terminal member 20 includes two clamping bodies 21A, 21B arranged side by side at a predetermined interval in the vertical direction, a connecting piece 22 connecting the clamping bodies 21A, 21B at the right front ends of the clamping bodies 21A, 21B, a positioning operation piece 23 connecting the clamping bodies 21A, 21B at the left front ends of the clamping bodies 21A, 21B, and terminal fittings 24, 24 exposed on the opposing surfaces of the clamping bodies 21A, 21B (the lower surface of the clamping body 21A and the upper surface of the clamping body 21B). The connecting piece 22 is formed in a columnar shape extending in the vertical direction, similar to the operation piece 12. The positioning operation piece 23 is also formed in a columnar shape extending in the vertical direction, similar to the positioning piece 13, and its lower surface is an inclined surface that slopes upward toward the rear, so that it functions as an operation surface 23A for operating a left pole display body 35, which will be described later. Furthermore, a positioning protrusion 25 that protrudes leftward is also provided on the left side surface of the positioning operation piece 23. The first terminal member 10 and the second terminal member 20 are made of the same material. However, although the upper surface of the connecting piece 22 of the second terminal member 20 is an inclined surface, it does not function like the operation surface 12A of the operation piece 12 of the first terminal member 10. Similarly, the lower surface of the positioning piece 13 of the first terminal member 10 is an inclined surface, but it does not function like the operation surface 23A of the positioning operation piece 23 of the second terminal member 20.

[0015] Meanwhile, the rear of the main body case 2 includes a support 41 that slidably supports the first terminal member 10 and the second terminal member 20, a right cover 42 attached to the right side of the support 41, and a left cover 43 attached to the left side of the support 41. The support 41 has a bottom and a ceiling that protrude rearward, and a guide pillar that extends vertically and connects the bases (front portions) of the bottom and ceiling. By attaching the first terminal member 10 and the second terminal member 20 to the rear surface of the guide pillar, the first terminal member 10 and the second terminal member 20 can slide vertically in the space between the bottom and ceiling. In addition, a right mounting groove 44 is provided on the right side surface of the ceiling of the support 41, extending in the longitudinal direction, for mounting the right polar display body 31 so that it can slide forward and backward. A right restricting protrusion 45 protrudes rightward below the right mounting groove 44 and restricts the right polar display body 31 from sliding rearward beyond the first display position (described later). Meanwhile, a left mounting groove 46 is provided on the left side surface of the ceiling of the support 41 in the front-to-rear direction to mount the left polar display body 35 so that it can slide in the front-to-rear direction, and a left restricting protrusion (not shown) is provided below the left mounting groove 46, protruding to the left and restricting the left polar display body 35 from sliding rearward beyond a third display position, which will be described later. Furthermore, the top surface of the support 41 is provided with a notch 48 that opens to the right and constitutes a right polar display window 53, which will be described later, and a notch 49 that opens to the left and constitutes a left polar display window 57, which will be described later.

[0016] The right cover 42 is formed in a U-shape in side view (viewed from the left side), and is provided on its left side with a right guide groove 50 that guides the operating piece 12 and the connecting piece 22 when the first terminal member 10 and the second terminal member 20 slide up and down, and a right storage recess 51 in which the right polar indicator 31 is stored when assembled to the support body 41. In addition, the top surface of the right cover 42 is provided with a notch 52 that opens to the left and is continuous with the notch 48 to form a right polar indicator window 53 when assembled to the support body 41.

[0017] On the other hand, the left cover 43 is formed in a U-shape in side view (viewed from the left side), and is provided on its right side with a left guide groove 54 that guides the positioning piece 13 and the positioning operation piece 23 when the first terminal member 10 and the second terminal member 20 slide up and down, and a left storage recess 55 in which the left pole indicator 35 is stored when the cover is assembled to the support body 41. Also, the top surface of the left cover 43 is provided with a notch 56 that opens to the right and that, when assembled to the support body 41, is connected to the notch 49 to form a left pole indicator window 57. Note that a positioning recess (not shown) is provided within the left guide groove 54 to hold the first terminal member 10 in the first position by engaging with the positioning protrusion 15 of the first terminal member 10 when it is in the first position. In addition, a positioning recess (not shown) is also provided within the left guide groove 54 for holding the first terminal member 10 and the second terminal member 20 in the second position by engaging with the positioning protrusion 15 of the first terminal member 10 in the second position and the positioning protrusion 25 of the second terminal member 20 in the second position.

[0018] Additionally, the right polar display 31 has a plate-like main body 31a that stands upright in the vertical direction, an upper wall portion 31b formed by bending the upper end of the main body 31a backward, and a lower wall portion 31c formed by bending the lower end of the main body 31a forward. A fitting projection 32 that protrudes forward is provided on the front surface of the main body 31a, and a spring 61 that urges the right polar display 31 rearward (toward the second display position) can be fitted thereto. A forward-protruding operating piece 33 is provided on the right edge of the rear surface of the main body 31a, at a position spaced downward from the upper wall portion 31b to allow the right restricting protrusion 45 to enter. The lower surface of the leading end (rear end) of the operating piece 33 is inclined upward toward the rear, and is able to abut against the operating surface 12A of the operating piece 12 of the first terminal member 10. Furthermore, the upper surface of the upper wall portion 31b is a display surface that constitutes the right pole display portion 34, with the front portion of the upper surface being a second right pole display portion 34A that indicates that the first terminal member 10 is in the second position, and the rear portion of the upper surface being a first right pole display portion 34B that indicates that the first terminal member 10 is in the first position.

[0019] The left polar display body 35 has a plate-shaped main body 35a that extends vertically to approximately the same height as the support body 41, an upper wall portion 35b formed by bending the upper end of the main body 35a backward, and a lower wall portion 35c formed by bending the lower end of the main body 35a backward. A fitting protrusion 36 that protrudes forward is provided at the lower end of the front surface of the main body 35a, and a spring 62 that urges the left polar display body 35 backward (towards the third display position) can be fitted into the fitting protrusion. In addition, a restricting piece 37 that protrudes forward is provided on the left edge of the rear surface of the main body 35a, at a position spaced downward from the upper wall portion 35b to allow the left restricting protrusion to enter. Furthermore, the upper surface of upper wall portion 35b is configured as a display surface that constitutes left polarity display portion 38, with the front portion of the upper surface configured as first left polarity display portion 38A that indicates that second terminal member 20 is in the second position, and the rear portion of the upper surface configured as second left polarity display portion 38B that indicates that second terminal member 20 is in the third position. In addition, the top surface of the leading end (rear end) of lower wall portion 35c is configured as an inclined surface that slopes downward toward the rear, and is capable of contacting operation surface 23A of positioning operation piece 23 of second terminal member 20.

[0020] The rear part of the main body case 2 is assembled as follows. First, the first terminal member 10 and the second terminal member 20 are attached to the guide pillar of the support body 41 so that the first terminal member 10 is positioned above the second terminal member 20, and the right polarity indicator 31 and the left polarity indicator 35 are attached by inserting the right polarity indicator 34 into the right mounting groove 44 and the left polarity indicator 38 into the left mounting groove 46, respectively. Next, the right cover 42 is attached to the right side of the support body 41 so as to cover the operation piece 12 of the first terminal member 10, the connecting piece 22 of the second terminal member 20, and the right polarity indicator 31. Finally, the left cover 43 is attached to the left side of the support body 41 so as to cover the positioning piece 13 of the first terminal member 10, the positioning operation piece 23 of the second terminal member 20, and the left polarity indicator 35, completing the assembly of the rear of the main body case 2.

[0021] In the assembled state, the first terminal member 10 is slidable up and down between the first position and the second position, with the operation piece 12 guided by the right guide groove 50 and the positioning piece 13 guided by the left guide groove 54. The second terminal member 20 is slidable up and down between the second position and the third position, with the connecting piece 22 guided by the right guide groove 50 and the positioning operation piece 23 guided by the left guide groove 54. The notches 48 and 52 are connected to form a right polar indicator window 53, with a portion of the right polar indicator 34 exposed in the right polar indicator window 53, and the notches 49 and 56 are connected to form a left polar indicator window 57, with a portion of the left polar indicator 38 exposed in the left polar indicator window 57. In addition, the right pole display body 31 and the left pole display body 35 are each biased rearward by springs 61 and 62, and the action piece 33 of the right pole display body 31 is positioned vertically above the operating piece 12 of the first terminal member 10, and the lower wall portion 35c of the left pole display body 35 is positioned vertically below the positioning operating piece 23 of the second terminal member 20.

[0022] Here, the positions of the first terminal member 10 and the second terminal member 20 and the polar display by the polar display sections 34, 38 according to the positions will be described. First, we will explain the case where the input voltage is 100V and the polarity of the power-side terminal 4 is N-L2. In this case, as shown in FIG. 1, terminal port P1 must be formed by the first terminal member 10, and terminal port P3 must be formed by the second terminal member 20. Therefore, the first terminal member 10 and the second terminal member 20 are slid to position the first terminal member 10 in the first position and the second terminal member 20 in the third position. As the first terminal member 10 slides, the operating surface 12A of the operating piece 12 contacts the operating piece 33 and applies a forward load to the operating piece 33. Therefore, the right polarity indicator 31 slides forward against the biasing force of the spring 61 and moves to the first display position where the first right polarity indicator portion 34B is exposed in the right polarity indicator window 53, as shown in FIG. 9(a), indicating that the first terminal member 10 is in the first position. Meanwhile, as the second terminal member 20 slides, the operation surface 23A of the positioning operation piece 23 comes into contact with the lower wall portion 35c of the left polar indicator 35, and then applies a forward load to the left polar indicator 35. Therefore, the left polar indicator 35 slides forward against the biasing force of the spring 62, and moves to the fourth indication position where the second left polar indicator portion 38B is exposed in the left polar indicator window 57, as shown in Figure 9(a), indicating that the second terminal member 20 is in the third position.

[0023] Furthermore, when the input voltage is 100V and the polarity of the power terminal 4 is N-L1, the first terminal member 10 must form the terminal port P1, and the second terminal member 20 must form the terminal port P2, as shown in FIG. 5. Therefore, the first terminal member 10 and the second terminal member 20 can be slid to position the first terminal member 10 in the first position and the second terminal member 20 in the second position, respectively. As the first terminal member 10 slides, the right polarity indicator 31 slides forward in the same manner as described above, moving to the first position where the first right polarity indicator 34B is exposed in the right polarity indicator window 53, as shown in FIG. 9(b), indicating that the first terminal member 10 is in the first position. Meanwhile, as the second terminal member 20 slides, the operating surface 23A of the positioning operation piece 23 moves away from the lower wall portion 35c of the left polarity indicator 35. Therefore, the left pole display body 35 slides rearward due to the force of the spring 62, and moves to the third display position where the first left pole display part 38A is exposed in the left pole display window 57, as shown in Figure 9(b), thereby indicating that the second terminal member 20 is in the second position.

[0024] Furthermore, when the input voltage is 200 V and the polarity of the power terminal 4 is L1-L2, as shown in FIG. 7, the first terminal member 10 must form the terminal port P2, and the second terminal member 20 must form the terminal port P3. Therefore, the first terminal member 10 and the second terminal member 20 can be slid to position the first terminal member 10 in the second position and the second terminal member 20 in the third position. As the first terminal member 10 slides, the operating surface 12A of the operating piece 12 moves away from the operating piece 33 of the right polarity indicator 31. Therefore, the right polarity indicator 31 slides rearward due to the biasing force of the spring 61, and moves to the second display position where the second right polarity indicator portion 34A is exposed in the right polarity indicator window 53, as shown in FIG. 9(c), indicating that the first terminal member 10 is in the second position. Meanwhile, as the second terminal member 20 slides, the left pole display 35 slides forward in the same manner as described above, and moves to the fourth display position where the second left pole display part 38B is exposed within the left pole display window 57, as shown in Figure 9(c), indicating that the second terminal member 20 is in the third position.

[0025] According to the circuit breaker 1 having the above-described configuration, the first terminal member 10 having the terminal fittings 14 and capable of inserting and connecting a conductive bar is provided in the main body case 2 so as to be slidable in the vertical direction between a first position corresponding to the upper terminal port P1 and a second position corresponding to the central terminal port P2, and the second terminal member 20 having the terminal fittings 24 and capable of inserting and connecting a conductive bar is provided below the first terminal member 10 so as to be slidable in the vertical direction between the second position and a third position corresponding to the lower terminal port P3. Terminal port P1 and terminal port P2 are formed by positioning the first terminal member 10 in the first position and the second terminal member 20 in the second position, terminal port P1 and terminal port P3 are formed by positioning the first terminal member 10 in the first position and the second terminal member 20 in the third position, and terminal port P2 and terminal port P3 are formed by positioning the first terminal member 10 in the second position and the second terminal member 20 in the third position. Therefore, the positions of the terminal ports can be easily selected and changed depending on the usage mode of the circuit breaker 1, making the circuit breaker 1 easy to use.

[0026] The right polarity display body 31 is provided with a first right polarity display unit 34B that displays that the first terminal member 10 is in a first position, and a second right polarity display unit 34A that displays that the first terminal member 10 is in a second position, and is movable between a first display position where the first right polarity display unit 34B is exposed on the surface of the main body case 2 and a second display position where the second right polarity display unit 34A is exposed as the first terminal member 10 moves, and a left polarity display body 35 is provided with a first left polarity display unit 38A that displays that the second terminal member 20 is in a second position, and a second left polarity display unit 38B that displays that the second terminal member 20 is in a third position, and is movable between a third display position where the first left polarity display unit 38A is exposed on the surface of the main body case 2 and a fourth display position where the second left polarity display unit 38B is exposed as the second terminal member 20 moves. Therefore, depending on which pole display portion is exposed on the surface of the main body case 2, the worker can easily grasp the position of the terminal fitting 14 of the first terminal member 10 and the terminal fitting 24 of the second terminal member 20, and ultimately the polarity of the power supply side terminal 4, making it easy to perform various tasks when installing in a distribution board, etc.

[0027] Furthermore, the right pole indicator 31 is provided with a spring 61 that biases it toward the second indication position, and the left pole indicator 35 is provided with a spring 62 that biases it toward the third indication position, while the right pole indicator 31 is provided with an action piece 33, the first terminal member 10 is provided with an operation piece 12 that moves the right pole indicator 31 by abutting against / separating from the action piece 33 as it slides up and down, and the left pole indicator 35 is provided with a bottom wall portion 35c, and the second terminal member 20 is provided with a positioning operation piece 23 that moves the left pole indicator 35 by abutting against / separating from the bottom wall portion 35c as it slides up and down. Therefore, the right pole indicator 31 and the left pole indicator 35 can be moved with a relatively simple structure, and the display mode of the pole indicator can be changed, and rising costs for the circuit breaker 1 can be suppressed.

[0028] The circuit breaker according to the present invention is not limited to the above-described embodiment, and the overall configuration of the circuit breaker as well as the configuration of the terminal members and pole indicators can be appropriately changed as needed.

[0029] For example, the specific markings to be adopted in the pole indicator can be changed as needed, and the markings may be in different colors or may specifically display a letter such as "N." Also, if the color of the cable to be connected to the load terminal matches the color of the pole indicator, the circuit breaker can be designed with even less risk of incorrect connection. Furthermore, when the first terminal member and the second terminal member are arranged to be movable in the vertical direction, the mechanism used to move both terminal members can be designed and modified as appropriate, and there is no problem in configuring both terminal members to move using, for example, a rotation mechanism. In addition, in the above embodiment, the upper terminal port P1 is the neutral terminal, but the central terminal port P2 may also be the neutral terminal, and which terminal port is the neutral terminal and which terminal port is the voltage terminal can be changed as appropriate, and the present invention can also be suitably adopted not only in single-phase three-wire circuit breakers but also in three-phase three-wire circuit breakers. [Explanation of symbols]

[0030] 1 Circuit breaker, 2 Main body case, 4 Power supply side terminal, 10 First terminal member, 12 Operation piece, 12A Operation surface, 14 Terminal fitting, 20 Second terminal fitting, 23 Positioning operation piece, 23A Operation surface, 24 Terminal fitting, 31 Right pole indicator (first pole indicator), 33 Operating piece, 34A Second right pole indicator (second pole indicator), 34B··First right polarity indicator (first polarity indicator), 35··Left polarity indicator (second polarity indicator), 35c··Bottom wall, 38A··First left polarity indicator (third polarity indicator), 38B··Second left polarity indicator (fourth polarity indicator), 53··Right polarity indicator window, 57··Left polarity indicator window, 61, 62··Spring, P1··Upper terminal port, P2··Central terminal port, P3··Lower terminal port.

Claims

[Claim 1] A circuit breaker in which any two of three terminal ports, an upper terminal port, a central terminal port, and a lower terminal port, into which a conductive bar can be inserted and connected, can be arranged in a vertical direction in a main body case, A first terminal member having a terminal fitting and capable of being inserted and connected to the conductive bar is provided on the main body case so as to be movable in the vertical direction between a first position corresponding to the upper terminal port and a second position corresponding to the central terminal port, and a second terminal member having a terminal fitting and capable of being inserted and connected to the conductive bar is provided below the first terminal member, aligned in the vertical direction with the first terminal member, and movable in the vertical direction between the second position and a third position corresponding to the lower terminal port, The upper terminal port and the central terminal port are formed by positioning the first terminal member at the first position and the second terminal member at the second position, The upper terminal port and the lower terminal port are formed by positioning the first terminal member at the first position and the second terminal member at the third position, The center terminal port and the lower terminal port are formed by positioning the first terminal member at the second position and the second terminal member at the third position, respectively; a first polar indicator body including a first polar indicator portion for indicating that the first terminal member is in the first position and a second polar indicator portion for indicating that the first terminal member is in the second position, the first polar indicator body being movable between a first indication position where the first polar indicator portion is exposed on the surface of the main body case and a second indication position where the second polar indicator portion is exposed as the first terminal member moves; a third pole indicator for indicating that the second terminal member is in the second position, and a fourth pole indicator for indicating that the second terminal member is in the third position, and a second pole indicator is provided that is movable between a third indicator position where the third pole indicator is exposed on the surface of the main body case and a fourth indicator position where the fourth pole indicator is exposed as the second terminal member moves.

Images