Shut-off gear

Abstract

To provide a shut-off gear capable of preventing a housing from being deformed in the outer shape thereof when a conductor is shut off by a pusher.SOLUTION: A shut-off gear 1 includes: a housing (lower housing 30) with a convex 30a; an igniter 10 for generating a gas; a pusher 60 positioned under the igniter 10; and a conductor 50 that is located below the pusher 60 inside the housing and has a separation part 51 that is to be separated by the pusher 60 receiving a pressure from the gas generated by the igniter 10. The convex 30a is located below the separation part 51, protruding upwards and is arranged to deform downwards when pushed by the pusher 60.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present disclosure relates to an isolating device. [Background technology]

[0002] Conventionally, there is known a circuit breaker that is connected to an electric circuit for use. One such circuit breaker has been disclosed (see Patent Document 1) that has a gas generating unit (igniter), a current carrying member (conductor) that forms part of the electric circuit, and a blade (pusher), and that moves the blade toward the current carrying member at high speed by gas generated by the gas generating unit to cut off the current carrying member. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2012-138247 A Summary of the Invention [Problem to be solved by the invention]

[0004] However, other equipment may be placed around the interrupting device, and it may be desirable for the external shape of the housing that contains the conductor, the pusher, etc. to not deform when the conductor is interrupted by the pusher.

[0005] In view of the above, the present disclosure provides a breaking device that can suppress deformation of the outer shape of the housing when the electric conductor is broken by the pusher. [Means for solving the problem]

[0006] A cutting device according to one embodiment of the present disclosure includes a housing having a first convex portion, an igniter that generates gas, a pusher located below the igniter, and a conductor located inside the housing and below the pusher and having a separation portion that is cut off by the pusher when subjected to the pressure of the gas generated by the igniter, wherein the first convex portion is located below the separation portion, protrudes upward, and is configured to be pushed by the pusher and deformed downward. Effect of the Invention

[0007] According to one aspect of the present disclosure, it is possible to realize a disconnecting device or the like that can suppress deformation of the outer shape of a housing when an electric conductor is interrupted by a pusher. [Brief description of the drawings]

[0008] [Figure 1A] FIG. 1A is a front view showing a blocking device according to a first embodiment. [Figure 1B] FIG. 1B is a perspective view showing the blocking device according to the first embodiment. [Diagram 2] FIG. 2 is a cross-sectional view showing the breaking device according to the first embodiment. [Diagram 3] FIG. 3 is a diagram for explaining the interrupting operation of the interrupting device according to the first embodiment. [Figure 4] FIG. 4 is a flowchart showing a manufacturing process of the interrupter according to the first embodiment. [Diagram 5] FIG. 5 is a perspective view showing a blocking device according to the second embodiment. [Figure 6] FIG. 6 is a cross-sectional view showing a blocking device according to the second embodiment. [Figure 7] FIG. 7 is a cross-sectional view showing a first example of various modified examples of the lower housing according to each embodiment. [Figure 8] FIG. 8 is a cross-sectional view showing a second example of various modified examples of the lower housing according to each embodiment. [Figure 9] FIG. 9 is a cross-sectional view showing a third example of various modified examples of the lower housing according to each embodiment. [Figure 10] FIG. 10 is a cross-sectional view showing a first example of a modification of the breaking device according to each embodiment. [Figure 11] FIG. 11 is a cross-sectional view showing a second example of a modified example of the breaking device according to each embodiment. [Figure 12] FIG. 12 is a cross-sectional view showing a third example of a modified example of the blocking device according to each embodiment. [Figure 13] FIG. 13 is a cross-sectional view showing a fourth example of a modification of the blocking device according to each embodiment. [Figure 14] FIG. 14 is a diagram for explaining the interrupting operation of the interrupter according to the fourth modified example. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] A cutting device according to one embodiment of the present disclosure includes a housing having a first convex portion, an igniter that generates gas, a pusher located below the igniter, and a conductor located inside the housing and below the pusher and having a separation portion that is cut off by the pusher when subjected to the pressure of the gas generated by the igniter, wherein the first convex portion is located below the separation portion, protrudes upward, and is configured to be pushed by the pusher and deformed downward.

[0010] As a result, the first protrusion is pushed by the pusher, which moves downward due to the pressure of the gas generated by the igniter, and deforms downward. In other words, the first protrusion can absorb the stress from the pusher by deforming downward, and therefore, it is possible to suppress the housing from expanding due to the stress from the pusher. Therefore, according to the interrupting device according to one aspect of the present disclosure, when the conductor is interrupted by the pusher, the first protrusion absorbs the stress from the pusher, and therefore, it is possible to suppress the outer shape of the housing from being deformed.

[0011] Also, for example, the first protrusion may be tapered upward.

[0012] This makes it possible to reduce the number of right-angled portions within the first convex portion, thereby making it possible to suppress localized concentration of stress.

[0013] Also, for example, before the separation portion is separated from the conductor, the distance between the tip end of the first protrusion and the separation portion may be smaller than the length of the pusher in the up-down direction.

[0014] This makes it possible to increase the insulation distance between the cut surfaces of the conductor when the conductor is cut off by the pusher, thereby making it possible to suppress the generation of an arc when the conductor is cut off.

[0015] Also, for example, the housing may have a first holder, the first holder having a first bottom and the first convex portion protruding upward from the first bottom, and the first holder may be configured such that the first bottom is deformed when the first convex portion is pressed by the pusher.

[0016] This allows the bottom portion connected to the first protrusion to deform in conjunction with the deformation of the first protrusion, thereby preventing stress from concentrating on the first protrusion and thus preventing damage to the housing.

[0017] Also, for example, the first protrusion may have a first wall portion extending upward from the first bottom portion, and the first wall portion may be cylindrical.

[0018] With this, since the first protrusion has a cylindrical first wall portion that is easily crushed, the stress of the pusher can be effectively absorbed, and thus deformation of the outer shape of the housing can be further suppressed.

[0019] Also, for example, the first convex portion may have a first wall portion extending upward from the first bottom portion, the first holder may have a recessed portion when viewed from below, and the first wall portion of the first convex portion may form an inner surface of the recessed portion.

[0020] As a result, a part of the housing also serves as the first protrusion, so that deformation of the outer shape of the housing can be suppressed without adding a separate member.

[0021] Also, for example, the first holder may further have a side wall portion, the side wall portion and the first convex portion being connected via the first bottom portion, and the first holder may be configured such that the side wall portion deforms when the first convex portion is pushed by the pusher.

[0022] This allows the side wall portion connected to the first protrusion via the first bottom portion to deform in conjunction with the deformation of the first protrusion, thereby making it possible to further prevent stress from concentrating on the first protrusion, thereby making it possible to further prevent damage to the housing.

[0023] Also, for example, the first holder may further have a side wall portion, the side wall portion and the first convex portion are connected via the first bottom portion, and at least a portion of an outer surface of the first bottom portion may be inclined upward as it moves from the first convex portion toward the side wall portion.

[0024] With this, the presence of an upwardly inclined portion in the first bottom portion can suppress deformation of the outer shape of the housing.

[0025] Also, for example, the first holder may further have a side wall portion, the side wall portion and the first convex portion are connected via the first bottom portion, and at least a portion of the inner surface of the first bottom portion may be inclined upward as it moves from the first convex portion toward the side wall portion.

[0026] This makes it possible to disperse pressure applied to the inside of the housing, thereby making it possible to suppress deformation of the outer shape of the housing.

[0027] Also, for example, the first holder may further have a side wall portion, the side wall portion and the first convex portion being connected via the first bottom portion, and the first bottom portion may have a connection portion connected to the first convex portion and an inclined portion connecting the connection portion and the side wall portion, the outer surface and the inner surface each inclining upward from the connection portion toward the side wall portion.

[0028] This makes it possible to disperse pressure inside the housing and to prevent the outer shape of the housing from being deformed.

[0029] Also, for example, the housing may further include a second holder, the second holder may be located below the first holder, and the first holder and the first protrusion may be integrally formed.

[0030] This allows the first holder to absorb at least a portion of the stress from the pusher, thereby preventing the second holder constituting the outer shell of the isolating device from being deformed, thereby preventing the outer shape of the housing from being deformed.

[0031] Also, for example, the second holder may have a second protrusion protruding upward, and the second protrusion may be located below the first protrusion of the first holder.

[0032] This allows the second convex portion to absorb the stress that the first convex portion could not absorb by deforming, thereby preventing the second holder from expanding, which in turn prevents the outer shape of the housing from deforming.

[0033] Also, for example, the second holder may have a second bottom and a second convex portion protruding upward from the second bottom, the second convex portion having a second wall portion extending upward from the second bottom, and the second wall portion may be arranged along the first wall portion.

[0034] As a result, since the first protrusion and the second protrusion are arranged to overlap each other, the doubly overlapping protrusions can effectively absorb the stress from the pusher, and thus deformation of the outer shape of the housing can be effectively suppressed.

[0035] Also, for example, the conductor may further have a retaining portion adjacent to the separation portion, and the pusher may be configured such that after the pusher separates the separation portion, an upper end of the pusher is positioned above the cut surface between the retaining portion and the separation portion.

[0036] As a result, the pusher is located above the holding portion, making the arc path longer, and the arc can be effectively interrupted.

[0037] Also, for example, the pusher may be configured so that when it is stationary with the first convex portion pressed downward, the distance between the lower end of the pusher and the lower end of the cut surface of the holding portion is the same as or greater than the distance between the upper end of the pusher and the upper end of the cut surface of the holding portion.

[0038] This prevents the pusher from passing over the cut surface of the conductor, lengthening the arc path and effectively breaking the arc after the pusher comes to rest.

[0039] Also, for example, the device may further include a resin member covering the conductor, the resin member having a buried portion in which the conductor is buried, a first cylindrical portion in which the pusher is disposed, and a second cylindrical portion located lower than the first cylindrical portion, the first cylindrical portion having a smaller inner diameter than the second cylindrical portion, and the pusher may be configured such that, when the pusher is stationary with the first convex portion pressed downward, an upper end of the pusher is adjacent to the first cylindrical portion and a lower end of the pusher is adjacent to the second cylindrical portion.

[0040] As a result, after the pusher comes to rest, the lower end of the pusher can be positioned in the space formed by the second cylindrical portion, which has a large volume. In other words, after the pusher comes to rest, the separated part cut by the pusher can be positioned in the space. Since the space has a large volume and the internal pressure generated by the arc can be reduced, the interrupter can reduce the pressure applied to the housing.

[0041] Also, for example, the device may include a housing, an igniter that generates gas, a conductor having a separation portion located inside the housing, a pusher located below the igniter and that separates the separation portion from the conductor under the pressure of the gas generated by the igniter, and a hollow member located inside the housing below the separation portion and having a hollow interior, wherein the separation portion is located below the pusher and the hollow member is configured to be deformed downward when pushed by the pusher.

[0042] This allows the stress from the pusher to be absorbed by the hollow member, which is a separate member, so that deformation of the outer shape of the housing can be suppressed.

[0043] Hereinafter, the embodiment will be specifically described with reference to the drawings.

[0044] The embodiments described below are all comprehensive or specific examples. The numerical values, shapes, components, the arrangement and connection of the components, steps (processes), and the order of the steps (processes) shown in the following embodiments are merely examples and are not intended to limit the present disclosure. Furthermore, among the components in the following embodiments, components that are not described in the independent claims are described as optional components.

[0045] In addition, each figure is a schematic diagram and is not necessarily illustrated precisely. Therefore, for example, the scales in each figure do not necessarily match. In addition, in each figure, substantially the same configurations are given the same reference numerals, and duplicated explanations are omitted or simplified.

[0046] In this specification and the drawings, the X-axis, the Y-axis, and the Z-axis indicate three axes of a right-handed three-dimensional Cartesian coordinate system. In each embodiment, the Z-axis direction is the moving direction of the pusher. In this specification, "plan view" means viewing the cutoff device from the Z-axis direction, and "side" means a direction perpendicular to the Z-axis direction. In this specification, the Z-axis direction is also described as the up-down direction. However, in this specification, the up-down direction of the cutoff device merely indicates the relative positional relationship of each element in the cutoff device for the convenience of explaining each embodiment. For example, in this specification, the terms "upward" and "downward" do not refer to the upward direction (vertically upward) and downward direction (vertically downward) in absolute spatial recognition, but are used as terms defined by the relative positional relationship based on the moving direction of the pusher. In addition, the posture when the cutoff device is installed is not limited to the direction shown in the drawings.

[0047] In addition, in this specification, terms indicating the relationship between elements, such as equal and parallel, terms indicating the shape of elements, such as trapezoid and cylinder, as well as numerical values ​​and numerical ranges, are not expressions that only express a strict meaning, but are expressions that also include a substantially equivalent range, for example, a difference of about a few percent (e.g., about 10%).

[0048] In addition, in this specification, ordinal numbers such as "first" and "second" do not refer to the number or order of components, unless otherwise specified, but are used for the purpose of avoiding confusion between and distinguishing between components of the same type.

[0049] (Embodiment 1) Hereinafter, the breaking device according to the present embodiment will be described with reference to FIGS. 1A to 4. FIG.

[0050] [1-1. Configuration of the circuit breaker] First, the configuration of the isolating device according to the present embodiment will be described with reference to Figs. 1A to 2. Fig. 1A is a front view showing the isolating device 1 according to the present embodiment. Fig. 1B is a perspective view showing the isolating device 1 according to the present embodiment. Fig. 2 is a cross-sectional view showing the isolating device 1 according to the present embodiment. The front view is a view of the isolating device 1 seen from a direction intersecting the up-down direction, and Fig. 1A is a view of the isolating device 1 seen from the X-axis direction. Moreover, the cross-sectional view is a view showing a cross section of the isolating device 1 cut along the YZ plane.

[0051] As shown in FIGS. 1A to 2, the cutoff device 1 includes an igniter 10, an upper housing 20, a lower housing 30, a resin member 40, a conductor 50, and a pusher 60. The cutoff device 1 is mounted on an object having an electric circuit, and is activated when an abnormality occurs in an electric circuit, a system, or the like in the object, thereby preventing damage from the abnormality from becoming greater. The cutoff device 1 is mounted on, for example, a vehicle, which is an example of the object, and is connected between a motor and a battery (for example, a lithium-ion battery) for driving the motor, and cuts off the electrical connection between the motor and the battery for driving the motor in an emergency such as an abnormality or an accident. The object may be something other than a vehicle, and examples of the object include, but are not limited to, home appliances and solar power generation systems.

[0052] The igniter 10 is an electric igniter having an explosive part having an ignition charge and a conductive pin for conducting electricity with the explosive part. When activated, an operating current for igniting the ignition charge is supplied to the conductive pin from an external power source, thereby igniting and burning the ignition charge and generating gas (combustion gas).

[0053] The igniter 10 is fixed to the upper small diameter portion 21 of the upper housing 20.

[0054] The upper housing 20 and the lower housing 30 are members that form the outer shell of the cutoff device 1, and house the igniter 10, the resin member 40, a part of the conductor 50, and the pusher 60. A space 70 extending in the vertical direction is formed inside the upper housing 20 and the lower housing 30. The space 70 is a space formed linearly so that the pusher 60 can move. The pusher 60 is housed at the upper end side (Z-axis positive side) of the space 70 in the vertical direction (Z-axis direction).

[0055] The upper housing 20 and the lower housing 30 are each formed of a metal such as stainless steel (SUS), but may be formed of other metals such as aluminum. The upper housing 20 and the lower housing 30 have a cylindrical outer shape, but the shape is not limited to this. The upper housing 20 and the lower housing 30 are fixed using fastening members such as screws and rivets. The upper housing 20 and the lower housing 30 are examples of housings.

[0056] The upper housing 20 is, for example, a cylindrical member having a stepped cylindrical shape, and is hollow inside. The upper housing 20 has a small diameter portion 21 located at the top, a large diameter portion 23 located at the bottom, and a connection portion 22 that connects them. The small diameter portion 21 and the large diameter portion 23 are arranged coaxially, and the large diameter portion 23 has a larger diameter than the small diameter portion 21.

[0057] The lower housing 30 is a member having a bottomed cylindrical shape with a hollow interior, and has a protrusion 30a protruding upward. Specifically, the lower housing 30 has a tip portion 31 and a wall portion 32 that form the protrusion 30a, a bottom portion 33, and a side wall portion 34. The tip portion 31, the wall portion 32, the bottom portion 33, and the side wall portion 34 are integrally formed. The lower housing 30 is an example of a first holder.

[0058] In this specification, integrally formed means that the components are made of the same material, are formed simultaneously, are the same, and so on.

[0059] The protrusion 30a is located below the separation portion 51 and is configured to protrude upward. The protrusion 30a is connected to one end of the bottom portion 33 and protrudes upward (toward the positive side of the Z axis) from the bottom portion 33. The protrusion 30a is configured to be pressed by the pusher 60 that moves downward due to the gas generated by the igniter 10 and deforms downward. For example, the protrusion 30a is configured to deform such that the tip portion 31 moves downward, or the protrusion 30a (tip portion 31) is crushed, or the protrusion 30a (tip portion 31) is crushed and dented, or the entire protrusion 30a moves downward, or the height of the protrusion 30a decreases. In other words, the protrusion 30a has a function of absorbing an impact (stress) from the pusher 60 by deforming.

[0060] Furthermore, when the blocking device 1 is viewed from the negative side of the Z axis toward the positive side of the Z axis (viewed from below), the protrusion 30a forms a recess in the lower housing 30. The protrusion 30a is exposed. In this embodiment, the protrusion 30a has a shape that tapers upward, but the shape is not limited to this. Other shapes and configurations of the protrusion 30a will be described in "Various Modifications of Each Embodiment" below.

[0061] The tip 31 is a flat plate-like portion located at the top of the protrusion 30a. The tip 31 is a portion that comes into contact with the separation portion 51 during the interruption operation. The tip 31 is planar and can receive the stress from the pusher 60 on its surface, so that the concentration of the stress can be suppressed compared to when the tip 31 is pointed.

[0062] In this specification, the term "contact" may refer to direct contact between two members, or indirect contact between the two members via another member disposed between the two members. For example, the term "contact" may refer to direct contact between the tip portion 31 and the separation portion 51, or indirect contact between the tip portion 31 and the separation portion 51 via another member disposed between the tip portion 31 and the separation portion 51. For example, an arc-extinguishing agent may be disposed between the tip portion 31 and the separation portion 51, or the separation portion 51 may be disposed between the tip portion 31 and the pusher 60. Indirect contact means that stress from one of the tip portion 31 and the separation portion 51 to the other can be transmitted via another member.

[0063] The wall portion 32 is a portion of the protrusion 30a that extends upward from the bottom portion 33. The wall portion 32 connects the tip portion 31 and the bottom portion 33, and has a predetermined inclination with respect to the tip portion 31. The wall portion 32 is tapered toward the tip portion 31 (a tapered cylinder without a bottom). For example, the cross-sectional shape of the protrusion 30a is trapezoidal. Since the wall portion 32 is cylindrical, the protrusion 30a has a configuration that is more easily crushed than, for example, a columnar shape. The wall portion 32 is also arranged coaxially with the small diameter portion 21 and the large diameter portion 23. The wall portion 32 also forms the inner surface of the recess when viewed from below. The wall portion 32 is an example of a first wall portion.

[0064] The bottom 33 connects the protrusion 30a and the side wall 34. In other words, the protrusion 30a and the side wall 34 are connected via the bottom 33. The outer surface and the inner surface of the bottom 33 are each inclined upward from the protrusion 30a toward the side wall 34. The bottom 33 is inclined in the opposite direction to the wall 32. The bottom 33 is an example of a first bottom.

[0065] The side wall portion 34 is connected to the other end of the bottom portion 33 and is formed to extend upward from the bottom portion 33. The side wall portion 34 has a tubular shape, and in this embodiment, has a cylindrical shape. The side wall portion 34 is disposed coaxially with the small diameter portion 21 and the large diameter portion 23. The side wall portion 34 has the same diameter as the large diameter portion 23, for example.

[0066] The thicknesses of the tip 31, the wall 32, the bottom 33 and the side wall 34 are the same, but may be different from each other, for example.

[0067] The resin member 40 is a member that covers a portion of the conductor 50. In addition, the resin member 40 forms a space 70. The resin member 40 has an embedded portion 41, a first cylindrical portion 42, and a second cylindrical portion 43.

[0068] The embedded portion 41 is a portion of the resin member 40 in which the conductor 50 is embedded. For example, a portion of the embedded portion 41 is exposed from the housing. The embedded portion 41 has a through hole in which the conductor 50 (specifically, the holding portion 52) is disposed.

[0069] The first cylindrical portion 42 is a portion of the resin member 40 that is disposed within the housing, and the pusher 60 is disposed inside when no cutoff operation is being performed (when no gas is being generated by the igniter 10). The first cylindrical portion 42 has an inner diameter smaller than that of the second cylindrical portion 43. The position of the pusher 60 shown in FIG. 2 indicates the initial position when no cutoff operation is being performed.

[0070] The second cylindrical portion 43 is a portion of the resin member 40 that is disposed inside the housing, and is located below the first cylindrical portion 42. The second cylindrical portion 43 has an inner diameter larger than that of the first cylindrical portion 42. This allows the volume of the lower side of the space 70 to be increased. Therefore, an increase in pressure inside the housing due to the gas generated by the igniter 10 and the resulting movement of the pusher 60 can be suppressed, and deformation of the cutoff device 1 can be suppressed.

[0071] In this manner, the pusher 60 moves within the space 70 formed by the first cylindrical portion 42 and the second cylindrical portion 43. Note that the first cylindrical portion 42 and the second cylindrical portion 43 are not limited to having different inner diameters, and may have the same inner diameter.

[0072] The conductor 50 is a conductive metal body located inside the upper housing 20 and the lower housing 30. The conductor 50 forms part of a predetermined electric circuit when the circuit breaker 1 is attached to the electric circuit, and is also called a bus bar. The conductor 50 is a flat plate-like member held by the resin member 40 and disposed so as to traverse the insides of the upper housing 20 and the lower housing 30. The conductor 50 has a separation portion 51 and a holding portion 52.

[0073] The conductor 50 may be made of a metal such as copper (Cu). However, the conductor 50 may be made of a metal other than copper, or may be made of an alloy of copper and another metal. For example, the conductor 50 may be made of manganese (Mn), nickel (Ni), platinum (Pt), etc.

[0074] The separation portion 51 is a portion of the conductor 50 that is separated by the pusher 60 when it receives the pressure of the gas generated by the igniter 10, and is located below the pusher 60 in the initial position.

[0075] The holding portion 52 is a portion of the conductor 50 that is held by the resin member 40. The holding portion 52 is a portion that does not overlap with the pusher 60 in a plan view, for example, a portion that overlaps with the resin member 40 in a plan view and a portion that is located outside the housing. The holding portion 52 maintains a state in which it is held by the resin member 40 even after the separation portion 51 is separated.

[0076] The pusher 60 is located below the igniter 10 and is arranged to be movable downward. When an abnormality occurs, the pusher 60 moves downward to cut the conductor 50 and emergency cut off the continuity in the electric circuit. The pusher 60 is formed of an insulating material such as synthetic resin. In this embodiment, the pusher 60 is formed of nylon. The pusher 60 has a cylindrical shape and has an outer diameter corresponding to the inner diameter of the small diameter part 21 of the upper housing 20. The pusher 60 has a recess 61, and the igniter 10 is disposed inside the recess 61. Note that the shape of the pusher 60 is not limited to the above, and can be appropriately changed according to the shapes of the upper housing 20 and the lower housing 30. The recess 61 is an upper part of the pusher 60, and is a part where a recess facing downward is provided. In the example of FIG. 2, the recess 61 is a part whose side surface is surrounded by the small diameter part 21 when the cutoff device 1 is not performing the cutoff operation (the state shown in FIG. 2).

[0077] Moreover, before the separation portion 51 is separated from the conductor 50, the distance L2 between the tip (e.g., tip 31) of the convex portion 30a and the separation portion 51 is smaller than the vertical length L1 of the pusher 60. Moreover, in this embodiment, no other member is disposed between the tip (e.g., tip 31) of the convex portion 30a and the separation portion 51. In other words, the distance L2 is the length of the space (air layer).

[0078] [1-2.Shutdown operation] Next, the interrupting operation of the interrupting device 1 configured as above will be described with reference to Fig. 3. Fig. 3 is a diagram for explaining the interrupting operation of the interrupting device 1 according to this embodiment. Fig. 3(a) is a cross-sectional view showing a state in which the pusher 60 comes into contact (collides) with the tip portion 31 after the separation portion 51 is interrupted. Fig. 3(b) is a cross-sectional view showing a state in which the pusher 60 has further moved downward from the state of Fig. 3(a) and the convex portion 30a has been deformed. Fig. 3(c) shows a state in which the pusher 60 has further moved downward from the state of Fig. 3(b) and the bottom portion 33 has been deformed in addition to the convex portion 30a.

[0079] First, when the igniter 10 is activated, the pusher 60 receives energy from the igniter 10 on its upper surface (pressure receiving surface), and moves downward at high speed from the initial position shown in Fig. 2, separates the separation part 51 from the holding part 52, and moves further downward at high speed together with the separated separation part 51. This allows the pusher 60 to forcibly and physically cut the conductor 50.

[0080] As shown in FIG. 3(a), the pusher 60 separates the separation portion 51 from the conductor 50 under the pressure of the gas generated by the igniter 10, and after separation, moves downward together with the separation portion 51 and contacts the tip portion 31 via the separation portion 51. In this embodiment, the pusher 60 and the separation portion 51 are in surface contact, and the separation portion 51 and the tip portion 31 are in surface contact. This makes it possible to prevent localized stress from being applied to the pusher 60 when the pusher 60 contacts the tip portion 31 via the separation portion 51, and therefore makes it possible to prevent the pusher 60 from being damaged. Note that, in this embodiment, an example in which the tip portion 31 is a flat surface is described, but the same effect can be achieved even if the tip portion 31 is a curved surface (for example, a shape such as that shown in FIG. 7(a) described later).

[0081] Since the distance L2 is smaller than the length L1, in (a) of Fig. 3, the upper surface (the surface on the positive side of the Z axis) of the pusher 60 is located above the holding parts 52. This makes it possible to lengthen the distance on the electrical path between the pair of holding parts 52 after the breaking operation, thereby making it possible to suppress the occurrence of an arc. In this way, the pusher 60 has the function of breaking the arc after breaking.

[0082] Next, as shown in FIG. 3B, the pusher 60 moves further downward from the state shown in FIG. 3A, causing the convex portion 30a to deform. The convex portion 30a is pushed by the pusher 60 and deforms downward. As a result, the deformation of the convex portion 30a can absorb the impact (stress) from the pusher 60. Even if the pusher 60 moves further downward, a part of the pusher 60 (for example, at least a part of the concave portion 61) is located above the cut surface 53. This can increase the insulation distance between the cut surfaces 53 of the conductor 50, thereby suppressing the generation of an arc when the conductor 50 is interrupted.

[0083] In this specification, pushing (or pressing) means that stress is applied to the convex portion 30a from the pusher 60. Pushing (or pressing) may mean, for example, that the pusher 60 applies stress directly to the convex portion 30a, or that the pusher 60 applies stress indirectly to the convex portion 30a via another member.

[0084] Next, as shown in Fig. 3(c) , the pusher 60 moves further downward from the state in Fig. 3(b), causing the bottom 33 to deform further downward, and the pusher 60 stops. Even in this state, a part of the pusher 60 (for example, at least a part of the recess 61) is located above the cut surface 53. This makes it possible to lengthen the insulation distance between the cut surfaces 53 of the conductor 50, thereby making it possible to suppress the occurrence of an arc when the conductor 50 is interrupted.

[0085] In addition, since the bottom 33 is connected to the convex portion 30a, it may be deformed when the convex portion 30a is pressed by the pusher 60 by a predetermined amount or more. In this way, the lower housing 30 according to this embodiment has a structure in which the bottom 33 is deformed when the convex portion 30a is pressed by the pusher. For example, the bottom 33 is configured to move downward. In addition, since the convex portion 30a and the bottom 33 are formed of the same material, the bottom 33 is more likely to deform than when the bottom 33 is made of a harder material than the convex portion 30a. By deforming the bottom 33 together with the convex portion 30a, the convex portion 30a and the bottom 33 can each absorb the impact (stress) from the pusher 60.

[0086] In this way, the isolating device 1 has the convex portion 30a, which can suppress large deformation of the bottom of the isolating device 1. For example, if the isolating device does not have the convex portion 30a and has a flat bottom, it is expected that the bottom will be greatly deformed because it cannot absorb the stress from the pusher 60 compared to when the isolating device has the convex portion 30a. Furthermore, in such a configuration, if the bottom is made of a hard material to suppress deformation of the bottom, there is a risk that the pusher will be damaged by the stress (impact) received from the bottom.

[0087] On the other hand, in the isolating device 1 according to the present embodiment, the convex portion 30a can absorb the stress from the pusher 60, and therefore deformation of the bottom portion 33 can be suppressed compared to when the bottom portion is flat. This makes it possible for the isolating device 1 to suppress a case from being significantly deformed due to activation, which may cause damage to other devices. In addition, the convex portion 30a deforms due to the stress (impact) received from the pusher 60, thereby mitigating the impact on the bottom portion 33, and therefore damage to the bottom portion 33 can be suppressed. In addition, the impact received by the pusher 60 from the bottom portion 33 can also be mitigated, and damage to the pusher 60 can be suppressed.

[0088] Moreover, since the protrusion 30a is configured as a part of the lower housing 30, it is possible to suppress deformation of the bottom 33 without adding a new member for absorbing stress from the pusher 60. This makes it possible to realize the breaking device 1 in which deformation of the housing is suppressed while suppressing increases in costs and the number of parts.

[0089] As described above, the blocking device 1 may be configured so that the bottom 33 is deformed when the convex portion 30a is pushed by the pusher 60. The blocking device 1 may also be configured so that the protruding direction of the convex portion pressed by the pusher 60 is reversed (see, for example, FIG. 14 described later). Note that deformation of the bottom 33 is not essential, and the convex portion 30a may be configured so that the pusher 60 stops without deforming the bottom 33. Furthermore, when the convex portion 30a is pushed by the pusher 60, the side wall portion 34 may also be deformed.

[0090] [1-3. Manufacturing method] Next, a method for manufacturing the interrupter 1 configured as above will be described with reference to Fig. 4. Fig. 4 is a flow chart showing the manufacturing process of the interrupter 1 according to this embodiment.

[0091] 4, the upper housing 20 is produced by molding or the like (S10), and the lower housing 30 is produced by molding or the like (S20). Note that step S10 may be performed after step S20.

[0092] The protrusion 30a is formed at the same time as the lower housing 30 is molded. For example, if the protrusion 30a has a shape that tapers upward, the number of right-angled portions in the protrusion 30a can be reduced, making it easier to manufacture the lower housing 30. Even if the connection portion between the protrusion 30a and the bottom 33 is not formed at a right angle, the lower housing 30 can be easily manufactured.

[0093] Next, the upper housing 20 and the lower housing 30 are fixed together (S30). For example, with the igniter 10, the resin member 40, the conductor 50, and the pusher 60 housed inside, the upper housing 20 and the lower housing 30 are fixed together without any gaps by fastening members or the like. In this way, the above-mentioned breaking device 1 is produced.

[0094] (Embodiment 2) The configuration of the interrupter according to the present embodiment will be described below with reference to Figures 5 and 6. Note that the following description will focus on differences from the first embodiment, and descriptions of the same or similar contents as the first embodiment will be omitted or simplified.

[0095] Fig. 5 is a perspective view showing the interrupting device 1a according to the present embodiment. Fig. 6 is a cross-sectional view showing the interrupting device 1a according to the present embodiment. The interrupting device 1a according to the present embodiment differs from the interrupting device 1 according to the first embodiment in that the protruding portion is provided separately from the housing.

[0096] 5 and 6, the interrupter 1a includes an igniter 10, an upper housing 20, a lower housing 130, a resin member 40, a conductor 50, and a pusher 60. In addition, a convex member 170 is fixed (for example, joined) to the lower housing 130.

[0097] The lower housing 130 is a hollow cylindrical member with a bottom. The lower housing 130 has a flat bottom 131. For example, when viewed from below, the blocking device 1a has no recess and is flat.

[0098] The convex member 170 is located below the separation portion 51, and is configured to protrude upward from the inner surface of the lower housing 130. In the present embodiment, the convex member 170 has a shape that tapers upward, but the shape is not limited to this. The convex member 170 has a tip portion 171, a wall portion 172, and a flange portion 173. The tip portion 171 and the wall portion 172 form a convex portion 170a.

[0099] The tip portion 171 is a flat plate-shaped portion located at the upper part of the protrusion 170a. The tip portion 171 is a portion that comes into contact with the separation portion 51 during the interruption operation.

[0100] The wall portion 172 connects the tip portion 171 and the flange portion 173. The wall portion 172 is tapered (a tapered cylinder without a bottom) toward the tip portion 171. The wall portion 172 is disposed coaxially with the small diameter portion 21 and the large diameter portion 23.

[0101] The flange portion 173 is a portion for fixing the protruding portion 170a to the lower housing 130, and is a flat plate-like portion provided so as to protrude laterally from the lower end portion of the wall portion 172. The flange portion 173 and the lower housing 130 (for example, the bottom portion 131) are joined by welding or the like. As a result, the protruding portion 170a is fixed to the lower housing 130.

[0102] In such an interrupter 1a, the convex portion 170a can absorb the downward stress from the pusher 60, so that the lower housing 130 can be prevented from being deformed.

[0103] In this way, the blocking device 1a may be configured such that the lower housing 130 and the protruding portion 170a are produced as separate bodies and then joined together by welding, fastening members, etc. Note that the method of fixing the lower housing 130 and the protruding portion 170a is not limited to welding and fastening members, and any other method may be used.

[0104] (Various modified examples of each embodiment) In the following, various modified examples applicable to each of the embodiments or to any of the embodiments will be described with reference to FIGS.

[0105] Fig. 7 is a cross-sectional view showing a first example of various modified examples of the lower housing 230 according to each embodiment. In Fig. 7, various modified examples of the configuration of the convex portion will be described. Fig. 7(a) and Fig. 7(b) show modified examples of the lower housing 30 according to embodiment 1, and Fig. 7(c) to Fig. 7(d) show modified examples of the lower housing 130 according to embodiment 2.

[0106] 7(a), the cross-sectional shape of the protrusion 230a may be semicircular, or may be dome-shaped, for example.

[0107] 7(b), the cross-sectional shape of the protrusion 230b may be triangular, or may be, for example, conical.

[0108] The protrusions may also have a solid structure with a solid interior.

[0109] 7(c), the cross-sectional shape of the protrusion 230c may be a solid rectangle. The protrusion 230c may be, for example, a rectangular parallelepiped. In this case, the protrusion 230c is made of a material (such as resin or aluminum alloy) that is crushed when pressed by the pusher.

[0110] 7(d), the cross-sectional shape of the protrusion 230d may be a solid trapezoid. The protrusion 230d may be, for example, a truncated cone. In this case, the protrusion 230d is made of a material (such as resin or aluminum alloy) that is crushed when pressed by the pusher.

[0111] Furthermore, the protrusion may have a hollow structure with a cavity inside, and an arc-extinguishing agent, cooling gas, etc. may be sealed in the cavity.

[0112] 7(e), the cross-sectional shape of the protrusion 230e may be a hollow rectangle. In this case, the protrusion 230e is fixed to the lower housing 230 in the same manner as in the second embodiment.

[0113] 7(f), the cross-sectional shape of the protrusion 230f may be a hollow trapezoidal shape without a flange portion. In this case, the protrusion 230f is fixed to the lower housing 230 as in the second embodiment.

[0114] 7(g), the cross-sectional shape of the protrusion 230g may be a hollow semicircle. In this case, the protrusion 230g is fixed to the lower housing 230 in the same manner as in the second embodiment.

[0115] 7(h), the cross-sectional shape of the protrusion 230h may be a hollow triangle. In this case, the protrusion 230h is fixed to the lower housing 230 in the same manner as in the second embodiment.

[0116] Next, various modified examples of the portion connecting the protrusion and the side wall will be described with reference to Fig. 8. Fig. 8 is a cross-sectional view showing a second example of various modified examples of the lower housing according to each embodiment. (a) to (c) of Fig. 8 show modified examples of the lower housing 30 according to embodiment 1.

[0117] As shown in Fig. 8(a), the lower housing 330 has a tip portion 331, a wall portion 332, a bottom portion 333, and a side wall portion 334. The tip portion 331 and the wall portion 332 form a protrusion portion 330a. Note that the shape of the protrusion portion 330a is not limited to the shape described below, and may be, for example, the shape shown in Fig. 2, Fig. 7(a) or Fig. 7(b).

[0118] The tip portion 331 is a flat plate-shaped portion of the protrusion 330a.

[0119] Wall portion 332 is a portion that connects tip portion 331 and bottom portion 333, and is disposed parallel to side wall portion 334. Note that lower housing 330 may have wall portion 32 instead of wall portion 332.

[0120] The bottom 333 connects the wall 332 and the side wall 334. The bottom 333 may have an inclined surface 333a in which at least a part of the outer surface is inclined upward from the convex portion 330a toward the side wall 334. For example, the at least a part of the bottom 333 is configured to become thinner toward the side wall 334. The inclined surface 333a may be formed on the entire outer surface of the bottom 333. Since the bottom 333 has a part inclined upward, the convex portion 330a can suppress deformation of the outer shape of the housing. Here, suppressing deformation means suppressing deformation so that the inclined surface 333a is positioned below the bottom 333 or to the side of the side wall 334 even if the inclined surface 333a is deformed.

[0121] 8(b), at least a part of the inner surface of the bottom 335 may have an inclined surface 335a that inclines upward from the convex portion 330a toward the side wall portion 334. For example, the at least a part of the bottom 335 is configured to become thicker toward the side wall portion 334. The inclined surface 335a may be formed on the entire inner surface of the bottom 335. Since the inclined surface 335a is provided, pressure applied to the inside of the housing can be dispersed, and the convex portion 330a can suppress deformation of the outer shape of the housing.

[0122] 8(c), lower housing 330 has tip portion 331, wall portion 332, connecting portion 336, inclined portion 337, and side wall portion 334. A bottom portion is formed by connecting portion 336 and inclined portion 337. Since the inner and outer surfaces of inclined portion 337 are inclined, protrusion 330a can distribute pressure inside lower housing 330 and can suppress deformation of the outer shape of the housing.

[0123] The connection portion 336 connects the protrusion 330 a and the inclined portion 337 .

[0124] The inclined portion 337 connects the connecting portion 336 and the side wall portion 334, and each of the outer surface and the inner surface may be inclined upward from the connecting portion 336 toward the side wall portion 334. The inclined portion 337 is inclined with respect to the tip portion 331, for example.

[0125] Next, various modified examples in which at least a part of the protrusion has a double structure will be described with reference to Fig. 9. Fig. 9 is a cross-sectional view showing a third example of various modified examples of the lower housing according to each embodiment. As shown in (a) to (f) of Fig. 9, the blocking device may include additional housings (additional housings 420a to 420f) that are provided separately from the lower housings (lower housings 410a, 410b, 410d) and positioned below the lower housings.

[0126] Each of the additional housings 420a to 420f is formed of, for example, the same material as the lower housing (for example, SUS), but is not limited to this. Each of the additional housings 420a to 420f constitutes a part of the outer periphery of the housing. At least a part of each of the additional housings 420a to 420f is exposed. Each of the additional housings 420a to 420f is an example of a second holder.

[0127] Here, "below the lower housing" may mean that at least a part of the housing is located below the lower housing, or that the housing is located below a protruding portion of the lower housing.

[0128] As shown in FIG. 9(a), the lower housing 410a may have a protruding portion 430a, and the blocking device may include an additional housing 420a. The additional housing 420a has a shape that conforms to the protruding portion 430a and the bottom portion 433a. Specifically, the additional housing 420a is in contact (surface contact) with the outer surfaces of the protruding portion 430a and the bottom portion 433a. That is, the additional housing 420a has a protruding portion 420a1 (an example of a second protruding portion) that protrudes upward, and a bottom portion 420a2 (an example of a second bottom portion). In addition, the protruding portion 420a1 has a second wall portion that extends upward from the bottom portion 420a2, and the second wall portion is disposed so as to conform to the wall portion (first wall portion) of the protruding portion 430a. In this case, the protruding portion 420a1 is fixed to the lower housing 410a, as in the second embodiment. When protrusion 420a1 and lower housing 410a are separate bodies, protrusion 420a1 and lower housing 410a are preferably joined together by welding or the like.

[0129] In such a blocking device, the thickness of the protrusion and bottom can be made thicker than the thickness of the side wall, so that deformation of lower housing 410a can be effectively suppressed.

[0130] As shown in FIG. 9B, the additional housing 420b has a hollow protruding portion 420b1 and a side wall portion 420b2. The side wall portion 420b2 constitutes the outer shell of the blocking device. In other words, the lower housing 410b is housed inside the additional housing 420b. The lower housing 410b has a protruding portion 430a. A part of the lower housing 410b is provided along the side wall portion 420b2 so as to be in contact with the side wall portion 420b2 as well.

[0131] The lower housing 410b and the additional housing 420b may each be made of metal. When the protruding portion 420b1 and the lower housing 410b are separate bodies, it is preferable that the protruding portion 420b1 (or the additional housing 420b) and the lower housing 410b are joined by welding or the like.

[0132] As shown in FIG. 9(c), the additional housing 420c may have a protrusion 420c1 that becomes a recess when viewed from below.

[0133] Each of the lower housing 410b and the additional housing 420c may be made of metal. When the protruding portion 420c1 and the lower housing 410b are separate bodies, it is preferable that the protruding portion 420c1 (or the additional housing 420c) and the lower housing 410b are joined by welding or the like.

[0134] As shown in FIG. 9(d), a lower housing 410d may have a configuration in which the portion provided along the side wall portion 420b2 of the lower housing 410b shown in FIG. 9(b) is omitted.

[0135] The lower housing 410d and the additional housing 420b may each be made of metal. When the protruding portion 420b1 and the lower housing 410d are separate bodies, it is preferable that the protruding portion 420b1 (or the additional housing 420b) and the lower housing 410d are joined by welding or the like.

[0136] As shown in (a) to (d) of Figure 9, the additional housing may be provided along the lower housing. For example, the first protrusion and the second protrusion may be arranged to overlap each other.

[0137] 9(e), the additional housing 420e may have a convex portion 420e1 having a shape different from that of the convex portion 430a of the lower housing 410a. The convex portion 420e1 may be, for example, mountain-shaped, but is not limited thereto. The convex portion 420e1 is located below the convex portion 430a and is not in contact with the convex portion 430a. The convex portion 420e1 comes into contact with the convex portion 430a as the convex portion 430a deforms downward.

[0138] The lower housing 410a and the additional housing 420e may each be made of metal. When the protrusion 420e1 and the lower housing 410a are separate bodies, it is preferable that the protrusion 420e1 (or the additional housing 420e) and the lower housing 410a are joined by welding or the like.

[0139] 9(f), the additional housing 420f may be disposed so as to cover the opening formed by the protrusion 430a. For example, the additional housing 420f may be a plate-shaped member.

[0140] The lower housing 410a and the additional housing 420f may each be made of metal. When the additional housing 420f and the lower housing 410a are separate bodies, the additional housing 420f and the lower housing 410a are preferably joined by welding or the like.

[0141] 9, for example, the additional housing can receive (absorb) stress (shock) that could not be received (absorbed) by the lower housing. For example, the convex portion (second convex portion) of the additional housing can receive stress that could not be received by the convex portion (first convex portion) of the lower housing. Since the lower housing can absorb at least a part of the stress of the pusher 60, deformation of the additional housing can be suppressed. Therefore, deformation of the isolating device, such as swelling of the outer shape of the isolating device, can be effectively suppressed.

[0142] Next, various configurations of the interrupting device will be further described with reference to Figs. 10 to 14. Fig. 10 is a cross-sectional view showing a first example of a modified example of the interrupting device according to each embodiment. In Fig. 10, in order to clearly show the positional relationship of the holding portion 52, the resin member 40 covering the conductor 50 (holding portion 52) is omitted. Also, Figs. 10 to 12 show the shape and the like of each component in a schematic manner.

[0143] 10(a), when separation portion 51 is pushed by pusher 60 and comes into contact with protrusion 30a after interruption, length L3 between the upper surface of conductor 50 and the upper end surface of pusher 60 is greater than zero. In addition, the upper surface of conductor 50 is located above cut surface 53 of holding portion 52. Pusher 60 may be configured such that the upper end of pusher 60 is located above cut surface 53 between holding portion 52 and separation portion 51 after pusher 60 separates separation portion 51. For example, pusher 60 may have length L1 such that the upper end is located above cut surface 53 when separation portion 51 comes into contact with protrusion 30a.

[0144] In addition, the pusher 60 may be configured so that after the pusher 60 separates the separation portion 51, presses the convex portion 30a downward, and comes to a stop, the distance L5 between the lower end of the pusher 60 and the lower end of the cut surface 53 of the holding portion 52 is the same as or greater than the distance L4 between the upper end surface of the pusher 60 and the upper end of the cut surface 53 of the holding portion 52.

[0145] Next, a modified example of the resin member included in the breaking device will be described with reference to Fig. 11. Fig. 11 is a cross-sectional view showing a second example of the modified example of the breaking device according to each embodiment.

[0146] 11, the resin member 80 has a first cylindrical portion 81 in which at least a part of the pusher 60 in the initial position is disposed, and a second cylindrical portion 82 located below the first cylindrical portion 81. The first cylindrical portion 81 and the second cylindrical portion 82 are disposed coaxially, and the second cylindrical portion 82 has a larger inner diameter than the first cylindrical portion 81.

[0147] The first cylindrical portion 81 has an inner surface 81a. The inner surface 81a is disposed so as to face a side surface of the pusher 60 in a cross-sectional view. The pair of inner surfaces 81a face each other in a cross-sectional view.

[0148] The second cylindrical portion 82 has an inner surface 82a. The inner surface 82a is inclined so that the inner diameter becomes larger toward the bottom. In a cross-sectional view, the pair of inner surfaces 82a have a tapered shape in which the inner diameter becomes smaller toward the top.

[0149] For example, the resin member 80 may be configured so that after the pusher 60 presses the convex portion 30a downward and comes to rest, the upper end of the pusher 60 is adjacent to the first cylindrical portion 81 and the lower end of the pusher 60 is adjacent to the second cylindrical portion 82.

[0150] Next, a modification of the convex portion will be described with reference to Fig. 12. Fig. 12 is a cross-sectional view showing a third example of a modification of the blocking device according to each embodiment.

[0151] 12, the blocking device includes a hollow member 90 having a hollow portion 90a that is hollow inside and is located below a separation portion 51 inside the housing, and the separation portion 51 is located below the pusher 60. The hollow member 90 is placed on the inner surface of the bottom portion 131, for example. Note that the hollow member 90 is not limited to being in contact with the bottom portion 131, and may be fixed between the separation portion 51 and the bottom portion 131, for example.

[0152] The hollow portion 90a is sealed, and may be filled with an arc-extinguishing agent such as a non-flammable gas or liquid that extinguishes the arc. In this case, the hollow member 90 is configured such that the hollow portion 90a and the space 70 communicate with each other due to the stress from the pusher 60. For example, the hollow member 90 has a strength that allows the hollow portion 90a and the space 70 to communicate with each other due to the stress from the pusher 60.

[0153] Such a blocking device can be easily manufactured since it is only necessary to place the hollow member 90 inside the housing.

[0154] Next, modified examples of the convex portion will be described with reference to Fig. 13 and Fig. 14. First, the configuration of a fourth example of the interrupter 1b will be described with reference to Fig. 13. Fig. 13 is a cross-sectional view showing a fourth example of a modified example of the interrupter 1b according to each embodiment.

[0155] As shown in FIG. 13, the interrupter 1b includes a lower housing 530 instead of the lower housing 30 of the interrupter 1 of the first embodiment.

[0156] Lower housing 530 has protrusion 530a protruding upward. Specifically, lower housing 530 has protrusion 530a, a bottom 533, and a side wall 34. Protrusion 530a, bottom 533, and side wall 34 are integrally formed. Lower housing 530 is an example of a first holder.

[0157] The protruding portion 530a is located below the separating portion 51 and is configured to protrude upward. The protruding portion 530a is connected to one end of the bottom portion 533 and protrudes upward (toward the positive side of the Z axis) from the bottom portion 533. The protruding portion 530a also has a flat plate-shaped portion on the upper side.

[0158] The protrusion 530a is configured to be deformed downward when pressed by the pusher 60 that moves downward due to the gas generated by the igniter 10. The protrusion 530a has a function of absorbing an impact (stress) from the pusher 60 by deforming.

[0159] The bottom 533 connects the protrusion 530a and the side wall 34. In other words, the protrusion 530a and the side wall 34 are connected via the bottom 533. The bottom 533 is provided to extend along the Y-axis direction. The bottom 533 is an example of a first bottom.

[0160] In such a lower housing 530, when the protrusion 530a is pressed downward by the pusher 60, it deforms so that the protruding direction is reversed (see FIG. 14(b) described later). The material and shape of the protrusion 530a are not particularly limited as long as the material and shape are such that the protruding direction can be reversed. For example, the material of the protrusion 530a can be metal such as stainless steel (SUS) or aluminum.

[0161] Before the separation portion 51 is separated from the conductor 50, the distance L6 between the tip (the end on the positive side of the Z axis) of the convex portion 530a and the separation portion 51 is smaller than the length L1 of the pusher 60 in the up-down direction.

[0162] The interrupting operation of the interrupter 1b configured as above will be described with reference to Fig. 14. Fig. 14 is a diagram for explaining the interrupting operation of the interrupter 1b according to the fourth example of the modified example.

[0163] 14(a) is a cross-sectional view of the breaking device 1b in a state where the breaking device 1b is not performing a breaking operation (initial position of the pusher 60). The configuration of FIG. 14(a) is the same as that of FIG.

[0164] 14B is a cross-sectional view showing a state in which the pusher 60 moves further downward from a state in which the pusher 60 comes into contact with (collides with) the convex portion 530a, causing the convex portion 530a to deform downward. When the convex portion 530a is pressed downward by the pusher 60, it deforms so that the protruding direction is reversed. When pressed downward by the pusher 60, the bottom portion 533 also deforms downward together with the convex portion 530a.

[0165] In such lower housing 530, the shape when deformed downward can be adjusted by the shapes, lengths, etc. of convex portion 530a and bottom portion 533, so that it is possible to suppress downward deformation to an unexpected extent when pressed downward by pusher 60. Furthermore, when the protruding direction of convex portion 530a is reversed, the kinetic energy of pusher 60 is consumed, so that pusher 60 can be rapidly decelerated. In other words, lower housing 530 can effectively absorb stress from pusher 60 by reversing the protruding direction of convex portion 530a.

[0166] (Other embodiments) Although the blocking device according to one or more aspects has been described based on each embodiment, the present disclosure is not limited to each of these embodiments. As long as it does not deviate from the spirit of the present disclosure, various modifications conceived by a person skilled in the art to this embodiment and forms constructed by combining components in different embodiments may also be included in the present disclosure.

[0167] For example, in the above embodiment, an example was described in which the housing is made of metal, but this is not limited to this, and for example, at least one of the lower housing and the additional housing may be made of a resin having deformable properties.

[0168] Furthermore, in the above embodiment, an example in which one protrusion is provided has been described, but a plurality of protrusions may be provided.

[0169] The order of the steps in the method for manufacturing an interrupter device described in the above embodiment may be changed. The steps in the method for manufacturing an interrupter device described in the above embodiment may be performed in one process or in separate processes. "Performed in one process" is intended to include the steps being performed using one device, being performed consecutively, or being performed at the same location. "Separate processes" is intended to include the steps being performed using separate devices, being performed at different times (e.g., different days), or being performed at different locations. [Industrial Applicability]

[0170] The present disclosure is useful for circuit breakers and the like arranged in electric circuits. [Explanation of symbols]

[0171] 1, 1a, 1b Circuit Breaker 10 Igniter 20 Upper case 21 Small diameter section 22 Connection 23 Large diameter section 30, 130, 230, 330, 410a, 410b, 410d, 530 Lower housing (first holder) 30a, 170a, 230a, 230b, 230c, 230d, 230e, 230f, 230g, 230h, 330a, 430a, 530a Convex portion (first convex portion) 31, 171, 331 Tip 32, 172, 332 wall 33, 131, 333, 335, 433a, 533 Bottom (1st bottom) 34, 334, 420b2 side wall part 40, 80 Resin material 41 Buried section 42, 81 First cylinder part 43, 82 Second cylinder part 50 Conductors 51 Separation part 52 Holding part 53 Cut surface 60 Pusher 61 Recess 70 space 81a, 82a inside 90 Hollow Members 90a Hollow part 170 Convex member 173 Flange part 333a, 335a Slope 336 Connection 337 Slope 420a, 420b, 420c, 420e, 420f Additional housing (second holder) 420a1, 420b1, 420c1, 420e1 Convex portion (second convex portion) 420a2 Bottom (2nd bottom) L1, L3 length L2, L4, L5, L6 distance

Claims

1. a housing having a first protrusion; an igniter for generating gas; a pusher located below the igniter; a conductor located inside the housing and below the pusher, the conductor having a separation portion that is separated by the pusher when pressure of the gas generated by the igniter is applied; The first protrusion is located below the separation portion, protrudes upward, and is configured to be pushed by the pusher and deformed downward. Shut-off device.

2. The first protrusion is tapered upward. The shutoff device according to claim 1 .

3. Before the separation portion is separated from the conductor, the distance between the tip of the first protrusion and the separation portion is shorter than the length of the pusher in the up-down direction. The shutoff device according to claim 1 or 2.

4. the housing has a first holder, The first holder includes: a first bottom; the first protrusion protruding upward from the first bottom, The first holder is configured such that the first bottom portion is deformed when the first protrusion is pushed by the pusher. The shutoff device according to claim 1 or 2.

5. the first protrusion has a first wall portion extending upward from the first bottom portion, The first wall portion is cylindrical. The shutoff device according to claim 4.

6. the first protrusion has a first wall portion extending upward from the first bottom portion, the first holder has a recess in a bottom view, The first wall portion of the first protrusion forms the inner surface of the recess. The shutoff device according to claim 4.

7. the first holder further has a side wall portion; the side wall portion and the first convex portion are connected via the first bottom portion, The first holder is configured such that the side wall portion is deformed when the first protrusion is pushed by the pusher. The shutoff device according to claim 6.

8. the first holder further has a side wall portion; the side wall portion and the first convex portion are connected via the first bottom portion, At least a portion of the outer surface of the first bottom portion is inclined upward from the first protrusion portion toward the side wall portion. The shutoff device according to claim 6.

9. the first holder further has a side wall portion; the side wall portion and the first convex portion are connected via the first bottom portion, At least a portion of the inner surface of the first bottom portion is inclined upward from the first protrusion portion toward the side wall portion. The shutoff device according to claim 6.

10. the first holder further has a side wall portion; the side wall portion and the first convex portion are connected via the first bottom portion, The first bottom portion is a connection portion connected to the first protrusion; an inclined portion connecting the connecting portion and the side wall portion, the outer surface and the inner surface of which are each inclined upward from the connecting portion toward the side wall portion; The shutoff device according to claim 6.

11. The housing further includes a second holder, the second holder is located below the first holder, The first holder and the first protrusion are integrally formed. The shutoff device according to claim 5.

12. the second holder has a second protrusion that protrudes upward, The second protrusion is located below the first protrusion of the first holder. The shutoff device of claim 11.

13. The second holder includes: A second bottom; and the second protrusion protruding upward from the second bottom, the second protrusion has a second wall portion extending upward from the second bottom portion, The second wall portion is disposed along the first wall portion. The shutoff device of claim 12.

14. the conductor further includes a holding portion adjacent to the separating portion, The pusher is configured such that, after the pusher separates the separation portion, an upper end of the pusher is positioned above a cut surface of the holding portion with the separation portion. The shutoff device according to claim 1 or 2.

15. The pusher is configured such that, when the pusher is in a stationary state with the first protrusion pressed downward, the distance between the lower end of the pusher and the lower end of the cut surface of the holding portion is equal to or greater than the distance between the upper end of the pusher and the upper end of the cut surface of the holding portion. The shutoff device of claim 14.

16. Further provided is a resin member covering the conductor, The resin member is a buried portion in which the conductor is buried; a first cylindrical portion in which the pusher is disposed; a second cylindrical portion located below the first cylindrical portion, The first cylindrical portion has an inner diameter smaller than that of the second cylindrical portion, The pusher is configured such that, when the pusher is in a stationary state with the first protrusion pressed downward, an upper end of the pusher is adjacent to the first cylindrical portion and a lower end of the pusher is adjacent to the second cylindrical portion. The shutoff device according to claim 1 or 2.

17. The housing and an igniter that generates gas; a conductor having a separation portion located inside the housing; a pusher located below the igniter, the pusher receiving pressure of the gas generated by the igniter and separating the separation portion from the conductor; a hollow member located below the separation part inside the housing, the hollow member having a hollow interior, the separating portion is located below the pusher, The hollow member is configured to be pushed by the pusher and deformed downward. Shut-off device.

Images