Earth leakage circuit breaker

Abstract

To suppress man-hours of work to set a route for sending electricity to an electric leakage breaking substrate and an overcurrent trapping terminal.SOLUTION: An electric leakage breaker comprises an overcurrent trapping terminal which operates a trapping mechanism as a current flows, a lead wire 13 which serves as a route for supplying electricity to an overcurrent breaking substrate, and a conductive connection member 50 which is electrically connected to a movable contact 11, wherein a part of the overcurrent trapping terminal and the lead wire 13 are arranged, side by side, on the connection member 50 and both connected to the connection member 50.SELECTED DRAWING: Figure 5

Description

Technical Field

[0001] The present invention relates to an earth leakage circuit breaker.

Background Art

[0002] Lead wires are arranged to connect between a substrate and a conductive member (such as a terminal fitting), and are used as a path for supplying power to the substrate. As described in Patent Document 1, generally, lead wires were connected to a conductive member individually. Further, an overcurrent trip element that operates a tripping mechanism when current flows was connected to a conductive member separately from the lead wire.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

[0004] By the way, in order to secure paths for sending current to the lead wire and the overcurrent trip element, if separate paths up to the terminal member are secured, there is a risk that the working hours will increase.

Summary of the Invention

Problems to be Solved by the Invention

[0005] The inventor of the present case has tried to solve this problem by earnestly studying this point. The problem to be solved by the present invention is to be able to suppress the working hours for setting a path for sending electricity to a substrate for earth leakage interruption and an overcurrent trip element.

Means for Solving the Problems

[0006] To solve the above problems, the leakage circuit breaker comprises an overcurrent tripping element that operates a tripping mechanism when current flows through it, a lead wire that serves as a path for supplying power to a leakage circuit breaker board, and a conductive connecting member that is electrically connected to a movable contact, wherein a part of the overcurrent tripping element and the lead wire are placed side by side on the connecting member and connected together to the connecting member.

[0007] Furthermore, it is preferable to provide a stranded wire that electrically connects the movable contact and the connecting member, and to connect the stranded wire to a location different from the connection point between the overcurrent tripping element of the connecting member and the lead wire.

[0008] Furthermore, it is preferable that the connecting member be equipped with a fixing piece used to crimp and secure the lead wire and the overcurrent tripping element.

[0009] Furthermore, it is preferable that the fixing piece provided on the connecting member is equipped with a temporary holding portion capable of temporarily holding the lead wire.

[0010] Furthermore, it is preferable that the fixing piece provided on the connecting member has a through hole that can temporarily hold the lead wire. [Effects of the Invention]

[0011] This invention makes it possible to reduce the amount of work required to set up the path for supplying electricity to the leakage circuit breaker board and the overcurrent tripping element. [Brief explanation of the drawing]

[0012] [Figure 1] This is a cross-sectional view showing the internal structure of a leakage circuit breaker in an embodiment. However, the cover is omitted. [Figure 2] This is a disassembled perspective view of the coil and other components that operate the tripping mechanism, as shown in Figure 1. However, the lead wires have been omitted from a certain point onward. [Figure 3] Figure 2 is a perspective view of the coil and other components that operate the tripping mechanism shown. [Figure 4]Figure 2 is a side view of the coil and other components that operate the tripping mechanism shown. [Figure 5] This is a view from below of the coil and other components that operate the tripping mechanism shown in Figure 2. [Figure 6] Figure 3 is an exploded perspective view of the coils and other components that operate the tripping mechanism shown. [Figure 7] Figure 3 is an exploded perspective view of the coils and other components that operate the tripping mechanism shown in Figure 3. However, this view is from a different direction than Figure 6. [Figure 8] This figure shows an example of a lead wire being passed through a through-hole that serves as a temporary holding part. [Figure 9] This is a perspective view of the connecting member of the embodiment. [Figure 10] This is a perspective view of the connecting member of the embodiment. However, it is viewed from a different direction than Figure 9. [Modes for carrying out the invention]

[0013] The following describes embodiments for carrying out the invention. As can be seen from Figures 1 to 5, the leakage circuit breaker 1 of the embodiment includes an overcurrent tripping element that operates a tripping mechanism when current flows through it, a lead wire 13 that serves as a path for supplying power to the leakage circuit breaker board 12, and a conductive connecting member 50 that is electrically connected to the movable contact 11. A part of the overcurrent tripping element and the lead wire 13 are connected side by side to the connecting member 50. This configuration makes it possible to reduce the amount of work required to set up the path for supplying electricity to the leakage circuit breaker board 12 and the overcurrent tripping element.

[0014] In this embodiment, the earth leakage circuit breaker 1 can send electricity from the primary side of the earth leakage circuit breaker 1 to the secondary side of the earth leakage circuit breaker 1 when the movable contact 11 and the fixed contact are in contact. The electricity that flows through the movable contact 11 is not only sent to the secondary side of the earth leakage circuit breaker 1, but is also used for electrical control of the earth leakage circuit breaker 1 itself.

[0015] In an embodiment, the electricity flowing through the movable contact 11 is sent to the leakage cutoff substrate 12 via a lead wire 13 or the like, enabling control using the leakage cutoff substrate 12 on which a circuit for discriminating the presence or absence of leakage is mounted. Further, the electricity flowing through the movable contact 11 is made to flow through an overcurrent tripping element so that when an overcurrent or the like occurs, the movable contact 11 and the fixed contact can be forcibly separated.

[0016] To enable these, the leakage circuit breaker 1 of the embodiment includes a conductive connection member 50 capable of drawing in electricity from the movable contact 11. A lead wire 13 used for sending electricity to the leakage cutoff substrate 12 and a part of the overcurrent tripping element are connected to this connection member 50. More specifically, a part of the overcurrent tripping element and the lead wire 13 are arranged side by side with respect to this connection member 50 and both are connected to the connection member 50. For this reason, it becomes possible to suppress the number of man-hours required for the manufacturing method.

[0017] Note that typical examples of the overcurrent tripping element are a coil 72, a bimetal, a heater for heating the bimetal, etc., but it is not necessary to limit them thereto. However, as the overcurrent tripping element, a part thereof can be connected to the connection member 50 together with the lead wire 13.

[0018] The overcurrent tripping element preferably has a wire with a diameter smaller than that of the wire 14 as a part to be connected to the connection member 50. Similar to the lead wire 13, if it is a wire with a diameter smaller than that of the wire 14, it is less likely to be restricted with respect to the connection method to the connection member 50. For example, when trying to connect the wire 14 by the connection member 50, since the wire 14 is thick, connection by welding is performed, but if the part of the overcurrent tripping element to be connected to the connection member 50 is a wire with a diameter smaller than that of the wire 14, it may be possible to avoid connection by welding.

[0019] In this embodiment, a coil 72 is used as an overcurrent tripping element, and a coil wire 72a, which is part of this coil 72, is connected to the connecting member 50 together with a lead wire 13 (see Figures 3 to 7). In this embodiment, the lead wire 13 is routed from one side of the connecting member 50 toward the fixing point, and the coil wire 72a is routed from the other side of the connecting member 50 toward the fixing point. The lead wire 13 and the coil wire 72a are routed adjacent to each other near the fixing point, and the fixing work is performed on them together in this routed state. In this embodiment, the coil wire 72a and the lead wire 13, which have a smaller diameter than the stranded wire 14, can be fixed using means other than welding.

[0020] While it is not always necessary to connect the wire 14 using the connecting member 50, if the wire 14 is connected using the connecting member 50, it is conceivable that a strong connection method, such as welding, may be used for the stranded wire 14 to the connecting member 50. For this reason, when a stranded wire 14 is provided to electrically connect the movable contact 11 and the connecting member 50, it is preferable to connect the stranded wire 14 to a location different from the connection point between the overcurrent tripping element of the connecting member 50 and the lead wire 13. In this way, it becomes unnecessary to use a strong connection method, such as welding, for the overcurrent tripping element and the lead wire 13. In other words, it becomes easier to adopt an appropriate connection method depending on what is being connected to the connecting member 50.

[0021] In this embodiment, the wire 14 is fixed to one side of the connecting member 50, and the lead wire 13 and coil wire 72a are fixed to the other side. The stranded wire 14 and the lead wire 13 may be fixed to the same side, but it is preferable that the stranded wire 14 and the lead wire 13 are not fixed together.

[0022] For example, it is preferable that the connecting member 50 is equipped with a fixing piece 51 used to crimp and fix the lead wire 13 and the overcurrent tripping element. The fixing piece 51 can be of any kind, but in this embodiment, it is made by cutting and bending a part of a plate-shaped member. This fixing piece 51 is equipped with a bent portion 51a that is bent at an obtuse angle, so as to suppress the movement of the lead wire 13 and the like during the crimping process.

[0023] Furthermore, it is preferable to have a configuration in which the fixing piece 51 of the connecting member 50 is equipped with a temporary holding portion 51b that can temporarily hold the lead wire 13. Since the lead wire 13 can be crimped while it is temporarily held, the crimping of the lead wire 13 can be performed properly.

[0024] The temporary holding portion 51b is preferably a through hole. In other words, it is preferable that the fixing piece 51 provided on the connecting member 50 has a through hole that can temporarily hold the lead wire 13. By adopting a simple structure such as a through hole, the lead wire 13 can be temporarily held.

[0025] In the examples shown in Figures 8 to 10, the through-hole is provided so as to overlap with the bent portion 51a of the fixing piece 51. Even when the fixing piece 51 has a bent portion 51a, it is not necessary to provide the temporary holding portion 51b, such as the through-hole, so as to overlap with the bent portion 51a of the fixing piece 51, but it is preferable to provide them in such a configuration. When temporarily holding the lead wire 13 in the through-hole, it is preferable to bend the lead wire 13 after inserting it into the through-hole so that the lead wire 13 does not easily fall out of the through-hole.

[0026] In addition to crimping for fixation, other methods may be used to further assist in the fixation. For example, soldering may be used. Unlike welding, which is performed on stranded wire 14, soldering does not melt the wire, so it does not provide a very strong fixation, but it is suitable for ensuring conductivity and can be used in conjunction with crimping to assist in the fixation.

[0027] The connecting member 50 in this embodiment is configured such that its main part has an L-shaped cross-section, allowing a portion of the overcurrent tripping element and the lead wire 13, which are positioned on the inner corner side, to be stably crimped. In this embodiment, when crimping these, the fixing piece 51 provided on the connecting member 50 is pressed against the side that forms the corner of the L-shaped cross-section. In this embodiment, the fixing piece 51 is formed by cutting and bending the area around the corner of the L-shape, but this configuration is not necessary. However, it is preferable to position the fixing piece 51 so that it presses against the side that forms the corner of the L-shaped cross-section, which is the portion of the overcurrent tripping element and the lead wire 13.

[0028] Furthermore, although the connecting member 50 in this embodiment has a stranded wire connecting portion 53 to which the stranded wire 14 is fixed at the end of the connecting member 50, the connecting member 50 may also be configured to have the stranded wire connecting portion 53 located near the center of the connecting member 50.

[0029] Here, we will briefly explain an example of the operation of the tripping mechanism that operates when an overcurrent occurs. In the example shown in Figure 3, a coil 72 is incorporated into a frame-shaped trip base 71. The upper end of the coil 72 is connected to the terminal fitting 15 on the load side. A movable iron core 73 is positioned in the center of the spiral-shaped coil 72, and a movable iron piece 74 is positioned above it. The movable iron piece 74 is attracted to the movable iron core 73 by the magnetic force generated when a large current flows through the circuit, and functions to operate the trigger lever. By adopting this configuration, the movable contact 11 and the fixed contact can be instantly tripped when an overcurrent flows.

[0030] The present invention has been described above with reference to the embodiments described above, but the present invention is not limited to the embodiments described above and can be made into various forms. For example, it is possible to provide a notch to form a temporary holding portion. [Explanation of symbols]

[0031] 1. Ground fault circuit breaker 11 Movable contact 12. Circuit board for leakage current interruption 13 Lead wires 14 stranded wire 50 Connecting Members 51 Fixed piece 51b Temporary holding part

Claims

1. It comprises an overcurrent tripping element that operates the tripping mechanism when current flows through it, a lead wire that serves as a path for supplying power to the leakage circuit breaker board, and a conductive connecting member that is electrically connected to the movable contact, A leakage circuit breaker in which a part of the overcurrent tripping element and a lead wire are connected side by side to the connecting member, It includes stranded wires that electrically connect the movable contact and the connecting member, A leakage circuit breaker that connects stranded wires to a location different from the connection point between the overcurrent tripping element of the connecting component and the lead wire.

2. The leakage circuit breaker according to claim 1, further comprising a fixing piece used for crimping and fixing lead wires and overcurrent tripping elements to the connecting member.

3. The leakage circuit breaker according to claim 2, wherein the fixing piece provided on the connecting member is equipped with a temporary holding portion capable of temporarily holding lead wires.

4. The device comprises an overcurrent tripping element that operates a tripping mechanism when current flows through it, a lead wire that serves as a path for supplying power to a leakage circuit breaker board, and a conductive connecting member that is electrically connected to a movable contact, A leakage circuit breaker in which a part of the overcurrent tripping element and a lead wire are connected side by side to the connecting member, The connecting member is equipped with a fixing piece used to crimp and secure the lead wire and the overcurrent tripping element. The fixing piece provided on the connecting member is equipped with a temporary holding part that can temporarily hold the lead wire, A leakage circuit breaker equipped with a fixing piece on the connecting member that has a through hole capable of temporarily holding lead wires.

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