Interruption device

Abstract

This protective switch device (1) comprises: an igniter (10) configured to generate gas; a push button (60) located at a height below the igniter (10); a conductor (50) with a disconnecting section (51) located below the push button (60) and a retaining section (52) connected to the disconnecting section (51); a lower housing (30) arranged at a height below the disconnecting section (51) and made of metal; an insulating element (110) arranged within the lower housing (30) and positioned at a height below the disconnecting section (51); and a plastic element (40) arranged at least partially within the lower housing (30) and configured to retain the retaining section (52). The push button (60) is configured to disconnect the disconnecting section (51) from the conductor (50) by absorbing the pressure of the gas generated by the igniter (10).The plastic element (40) and the insulating element (110) cover the inner surface of the lower housing (30). One end (113) of the insulating element (110) and one end (43a) of the plastic element (40) overlap each other. A lower end (43b) of the end (43a) of the plastic element (40) is located at a level below an upper end (113a) of the end (113) of the insulating element (110).

Description

Technical field

[0001] The present disclosure relates to circuit breaker devices. State of the art

[0002] Conventional circuit breaker devices are known that are connected to an electrical circuit during use. Patent literature (PTL) 1 discloses a circuit breaker device comprising a housing (case) in which a reinforcement frame is arranged. Cited literature Patent literature

[0003] PTL 1: International Publication No. 2018 / 003594 Summary of the invention; Technical task

[0004] In electrical circuits of electric vehicles and the like, the importance of a protective switch device that is able to interrupt the electrical circuits more reliably has increased from the perspective of preventing significant damage.

[0005] A circuit breaker device according to one aspect of the present disclosure comprises: an igniter configured to generate gas; a push button arranged at a level below the igniter; a conductor having a disconnecting section arranged below the push button and a retaining section connected to the disconnecting section; a cover element arranged at a level below the disconnecting section and made of metal; an insulating element arranged within the cover element and positioned at a level below the disconnecting section; and a plastic element arranged at least partially within the cover element and configured to retain the retaining section. The push button is configured to disconnect the disconnecting section from the conductor by absorbing the pressure of the gas generated by the igniter.The plastic element and the insulating element cover an inner surface of the cover element. One end of the insulating element and one end of the plastic element overlap each other. The lower end of the plastic element is positioned below the upper end of the insulating element.

[0006] According to one aspect of the present disclosure, it is possible to realize a protective switch device that can exhibit improved insulation performance. Brief description of the drawings [ Fig. 1A] Fig. Figure 1A is a front view showing a protective switch device according to embodiment 1. [ Fig. 1B] Fig. Figure 1B is a perspective view showing a protective switch device according to embodiment 1. [ Fig. 2A] Fig. Figure 2A is a cross-sectional view illustrating the configuration of a circuit breaker device according to embodiment 1 prior to an interruption operation. [ Fig. 2B] Fig. Figure 2B is a cross-sectional view illustrating the configuration of a circuit breaker device according to embodiment 1 after an interruption operation. [ Fig. 3A] Fig. Figure 3A is a perspective view of an insulating element according to embodiment 1 seen from above. [ Fig. 3B] Fig. Figure 3B is a front view showing an insulating element according to embodiment 1. [ Fig. 3C] Fig. Figure 3C is a perspective view of an insulating element according to embodiment 1 seen from below. [ Fig. 4A] Fig. Figure 4A is a perspective view of a sub-housing according to embodiment 1 seen from above. [ Fig. 4B] Fig. Figure 4B is a front view showing a lower housing according to embodiment 1. [ Fig. 4C] Fig. Figure 4C is a perspective view of a lower housing according to embodiment 1 seen from below. [ Fig. 5] Fig. Figure 5 is a cross-sectional view illustrating the configuration of a circuit breaker device according to embodiment 2 prior to an interruption operation. [ Fig. 6A] Fig. Figure 6A is a perspective view of an insulating element according to embodiment 2 seen from above. [ Fig. 6B] Fig. Figure 6B is a front view showing an insulating element according to embodiment 2. [ Fig. 6C] Fig. Figure 6C is a perspective view of an insulating element according to embodiment 2 seen from below. [ Fig. 7] Fig. Figure 7 is a cross-sectional view illustrating the configuration of a circuit breaker device according to a variant of embodiment 2 prior to an interruption operation. [ Fig. 8] Fig. Figure 8 is a front view illustrating an insulating element according to a variant of embodiment 2. [ Fig. 9] Fig. Figure 9 is a cross-sectional view illustrating the configuration of a circuit breaker device according to embodiment 3 prior to an interruption operation. [ Fig. 10A] Fig. Figure 10A is a perspective view of an insulating element according to embodiment 3 seen from above. [ Fig. 10B] Fig. Figure 10B is an exploded view of an insulating element according to embodiment 3, seen from above. [ Fig. 11] Fig. Figure 11 is a flowchart illustrating a manufacturing process of a protective switch device according to an exemplary embodiment or the like. Description of the embodiments

[0007] A circuit breaker device according to one aspect of the present disclosure comprises: an igniter configured to generate gas; a push button arranged at a height below the igniter; a conductor having a disconnecting section arranged below the push button and a retaining section connected to the disconnecting section; a cover element arranged at a height below the disconnecting section and made of metal; an insulating element arranged within the cover element and positioned at a height below the disconnecting section; and a plastic element arranged at least partially within the cover element and configured to retain the retaining section. The push button is configured to disconnect the disconnecting section from the conductor by absorbing the pressure of the gas generated by the igniter.The plastic element and the insulating element cover an inner surface of the cover element. One end of the insulating element and one end of the plastic element overlap each other. The lower end of the plastic element is positioned below the upper end of the insulating element.

[0008] Thus, the ends of the insulating element and the plastic element are arranged to overlap, and therefore an electric arc or an electrically conductive gas (hereinafter referred to as conductive gas or the like) generated by the arc is cooled as it flows between the ends of the insulating element and the plastic element, thereby reducing the electrical conductivity of the conductive gas or the like. In particular, the electric current, which is blocked as a result of the disconnection of the breaker from the push button, is prevented from flowing again through the metal cover element when the conductive gas or the like comes into contact with the cover element. Thus, it is possible to improve the insulating performance of the circuit breaker device from the perspective of preventing the reflow of electric current.

[0009] Furthermore, for example, the end of the insulating element can be positioned between the end of the plastic element and the cover element.

[0010] If the end of the insulating element is positioned between the end of the plastic element and the cover element, the arc's creepage path between the cut surface of the breaker section and the cover element can be increased, thus facilitating arc extinguishing. Furthermore, the high-temperature conductive gas generated during the break operation causes the plastic element to move (or deform) the insulating element radially outward toward the outside of the circuit breaker device. This reduces the distance between the insulating element and the plastic element, effectively decreasing the electrical conductivity of the conductive gas or similar substance. As a result, the circuit breaker device can more reliably prevent the electric current from re-flowing.

[0011] Furthermore, for example, the end of the plastic element can be positioned between the end of the insulating element and the cover element.

[0012] If the end of the plastic element is located between the end of the insulating element and the cover element, the creepage path of the arc between the cut surface of the separation section and the cover element can be increased, making it easier to extinguish the arc and thus more reliably preventing the reflow of electric current.

[0013] Furthermore, for example, the cover element may have a protruding section that is arranged below the insulating element, and the protruding section may extend upwards and be pushed by the push button.

[0014] Thus, the protruding section of the cover element is located below the insulating element (in other words, the insulating element is located between the separating section and the cover element), and therefore the path in which the arc is generated can be lengthened; consequently, it is possible to prevent the reflow of electric current more reliably.

[0015] Furthermore, for example, a gap can be provided between the cover element and the insulating element, whereby the gap can be arranged below the insulating element.

[0016] Thus, the insulating element can move downwards by a distance corresponding to the gap when pressed by the push button, thereby protecting it from damage caused by the push button's pressure. This makes it possible to improve the insulation performance of the circuit breaker device from the perspective of protecting the insulating element from damage.

[0017] Furthermore, for example, a gap may be provided between the cover element and the insulating element, wherein the insulating element may have: a first section covering a top surface of the projecting section of the cover element; and a second section arranged at a height below the first section, wherein the second section may cover an inner surface of a bottom section of the cover element and the gap may be arranged between the bottom section of the cover element and a bottom surface of the second section.

[0018] Thus, when the protruding section is pressed by the push button, the insulating element can move downwards by a distance corresponding to the gap, thereby protecting it from damage caused by the push button's pressure. This improves the insulating performance of the circuit breaker device by protecting the insulating element from damage.

[0019] Furthermore, the insulating element may, for example, comprise: a first element covering a top surface of the projecting section of the cover element; and a second element arranged to partially overlap the first element, the second element being able to cover an inner surface of a bottom section of the cover element, and the first element and the second element being able to be separate elements.

[0020] Thus, the insulating element is formed from two elements, which makes it possible to distribute the voltage exerted on the insulating element when the protruding section is pressed by the push button, thereby protecting the insulating element from damage. This improves the insulation performance of the circuit breaker device from the perspective of protecting the insulating element from damage.

[0021] Furthermore, the plastic element may, for example, comprise: an embedding section in which the retaining section is embedded; a first cylindrical section in which the push button is arranged; and a second cylindrical section which is arranged at a height below the first cylindrical section and has a diameter that is larger than a diameter of the first cylindrical section, wherein an inner diameter of the second cylindrical section may be smaller than an inner diameter of the insulating element.

[0022] Thus, the insulating element covers the inner surface of the cover element, and therefore it is possible to prevent a renewed flow of electric current while maintaining the size of the gap in which the arc expands (while preventing the protective switch device from increasing in size).

[0023] It should be noted that each of the exemplary embodiments described below illustrates a general or specific example. The numerical values, shapes, structural elements, the arrangement and connection of the structural elements, steps (manufacturing steps), the processing sequence of the steps (manufacturing steps), etc., shown in the following exemplary embodiments, etc., are merely examples and are not intended to limit the present disclosure. Among the structural elements in the following exemplary embodiments, structural elements not mentioned in any of the independent claims are described as optional structural elements.

[0024] It should be noted that the figures are schematic representations and not necessarily exact depictions. Therefore, for example, reductions in the figures are not necessarily to scale. Furthermore, essentially identical elements in the figures are labeled with the same reference symbols, and overlapping descriptions are omitted or simplified.

[0025] In the present description and drawings, the X-axis, Y-axis, and Z-axis represent three axes of the right-handed three-dimensional Cartesian coordinate system. In each of the exemplary embodiments, etc., the Z-axis direction is a direction of movement of the pusher, the Y-axis direction is a direction in which the conductor extends, and the X-axis direction is the width direction of the conductor.In this description, the term "front view" refers to a view from the positive side of the X-axis to the negative side of the X-axis; the term "top view" refers to a view from the positive side of the Z-axis to the negative side of the Z-axis; the term "cross-sectional view" refers to a view of a section of the circuit breaker device cut by a plane extending through and parallel to the Z-axis; and the term "side view" refers to a direction perpendicular to the Z-axis direction. Furthermore, in this description, the Z-axis direction is also referred to as the upward / downward direction or the vertical direction.It should be noted that the upward / downward direction or vertical direction of the circuit breaker device in this description merely indicates the relative positioning of the elements contained within the circuit breaker device for the purpose of describing the individual embodiments, etc. For example, the terms "top / upward / topward / topward" and "downward / downward / downward / downward" in this description do not denote an upward direction (vertically upward) and a downward direction (vertically downward) in the sense of an absolute distance, but are used as terms defined by the relative positioning based on the direction of movement of the push button. The position of the circuit breaker device in the installed state is not limited by the directions shown in the drawings.

[0026] Furthermore, in the present description, terms that denote the relationship between elements such as equality and perpendicularity, terms that denote the shapes of elements such as circles, numerical values ​​and numerical ranges, are not expressions that refer only to exact meanings, but expressions that refer to essentially equivalent ranges that, for example, have deviations of about a few percent (or about 10%).

[0027] Furthermore, in this description, ordinal numbers such as "first" and "second" do not refer to the number or order of the structural elements, but, unless otherwise stated, serve to avoid confusion and to distinguish between structural elements of the same type. [Version 1]

[0028] The following describes the configuration of the circuit breaker device according to the present exemplary embodiment with reference to Fig. 1A to Fig. 4C described. Fig. Figure 1A is a front view illustrating the protective switch device 1 according to the present exemplary embodiment. Fig. Figure 1B is a perspective view illustrating the circuit breaker device 1 according to the present exemplary embodiment. Fig. Figure 2A is a cross-sectional view illustrating the configuration of the circuit breaker device 1 according to the present exemplary embodiment prior to an interruption operation. Fig. Figure 2B is a cross-sectional view illustrating the configuration of the circuit breaker device 1 according to the present exemplary embodiment after the interruption process. Fig. 1B is a diagram of the in Fig. 1A shows the protective switch device 1, which was rotated around the Y-axis as the axis of rotation to obtain a perspective view of the protective switch device 1 from below.

[0029] It should be noted that in a perspective view, if there are axes oriented in the same direction on the drawing as the three axes of a three-dimensional Cartesian coordinate system, only one of the axes is shown. For example, in Fig. 1B The X-axis and the Z-axis are aligned in the same direction on the drawing, which is why only the Z-axis is shown.

[0030] As in Fig. 1A to Fig. As shown in Figure 2B, the protective switch device 1 comprises a detonator 10, an upper housing 20, a lower housing 30, a plastic element 40, a conductor 50, a push button 60, a protective section 80, elastic elements 90, 92, 94, 96, and an insulating element 110. The protective switch device 1 is a device that is attached to an object having an electrical circuit and is actuated to interrupt the electrical circuit when an anomaly occurs in the electrical circuit, system, or the like in the object, in order to prevent damage caused by the anomaly from becoming serious.For example, the circuit breaker 1 is attached to 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 powering the motor, in order to interrupt the electrical connection between the motor and the battery in the event of emergencies such as malfunctions and accidents. It should be noted that the object can also be something other than a vehicle; examples of the object include, but are not limited to, a household appliance and a photovoltaic system.

[0031] The detonator 10 holds powder inside, has a cover section 11 between the powder and the trigger 60, is arranged in a recessed section 61, and generates gas. For example, the detonator 10 is an electric detonator comprising: a powder section containing an ignition charge; and a conductive pin for conducting an electric current through the powder section. During operation, an operating current is supplied to the conductive pin from an external power source to ignite the ignition charge, causing it to ignite and burn, and generating gas (combustion gas). It should be noted that the design of the recessed section 61 allows the safety switch device 1 to be miniaturized.

[0032] The detonator 10 is attached to the small diameter section 21, which is located on the top of the upper casing 20.

[0033] The upper housing 20 and the lower housing 30, which form the outer casing of the circuit breaker device 1, accommodate the detonator 10, a section of each of the plastic elements 40 and the conductor 50, the push button 60, the protective section 80, the elastic elements 92, 94, 96, and the insulating element 110. A space 70, extending in an upward-downward direction, is formed within the upper housing 20 and the lower housing 30. This space 70 is shaped like a circular cylinder to allow the push button 60 to move within it. The push button 60 is located in a region of the space 70 that is situated at the upper end (on the positive side of the Z-axis) in the upward-downward direction (the Z-axis direction).

[0034] The upper housing 20 and the lower housing 30 are each made of a metal such as stainless steel (SUS), but can also be made of other metals such as aluminum. For example, the upper housing 20 and the lower housing 30 are each made of metal. It should be noted that it is sufficient if at least the lower housing 30 is made of metal, while the upper housing 20 can, for example, be made of plastic.

[0035] The outer shape of the upper housing 20 and the lower housing 30 is, for example, but not limited to, a circular cylinder. The upper housing 20 and the lower housing 30 are directly connected and fixed to each other, for example, by welding or the like. The lower housing 30 is an example of the cover element. The upper housing 20 and the lower housing 30 are each examples of the housing.

[0036] The upper housing 20, which is a cylindrical element in the shape of, for example, a stepped circular cylinder, is hollow inside. The upper housing 20 comprises: a small-diameter section 21 located in an upper region; a large-diameter section 23 located in a lower region; and a connecting section 22 that joins these small-diameter and large-diameter sections. The small-diameter section 21, the connecting section 22, and the large-diameter section 23 are formed in one piece. The small-diameter section 21 and the large-diameter section 23 are arranged coaxially, and the large-diameter section 23 has a larger diameter than the small-diameter section 21.The lower housing 30, which is an element located at a height below the separating section 51 and has the form of a hollow cylinder with a closed bottom, has a projecting section 30a that extends upwards. In particular, the lower housing 30 comprises the projecting section 30a, the bottom section 33, and the side wall section 34. The projecting section 30a, the bottom section 33, and the side wall section 34 are formed in one piece.

[0037] It should be noted that in the present description, "one-piece" has at least one of the following meanings: that components are made of the same material, that components are formed simultaneously, and that components have the same function (a single object).

[0038] The projecting section 30a is located below the separating section 51 and is configured to project upwards into the gap 70. The projecting section 30a is connected to one end of the base section 33 and extends upwards (on the positive side of the Z-axis) from the base section 33 into the gap 70. The projecting section 30a is configured to deform downwards when pressed by the insulating element 110, which is in contact with the trigger 60 that has moved downwards due to the gas generated by the igniter 10. This means that the projecting section 30a functions to absorb the impact (the load) from the trigger 60 by deforming when pressed by it. The projecting section 30a is located below the insulating element 110.

[0039] The protruding section 30a, which forms the recessed portion of the lower housing 30 when the circuit breaker 1 is viewed from the negative side of the Z-axis to the positive side of the Z-axis, is exposed from the outside of the circuit breaker 1. In the present embodiment, the protruding section 30a tapers upwards in the space 70, but the shape of the protruding section 30a is not limited to this tapered shape.

[0040] The base section 33 connects the preceding section 30a and the side wall section 34. In other words, the preceding section 30a and the side wall section 34 are connected via the base section 33. The base section 33 has an outer surface and an inner surface, each inclined upwards from the preceding section 30a to the side wall section 34.

[0041] The side wall section 34 is connected to the other end of the bottom section 33 and is designed to extend upwards from the bottom section 33. The side wall section 34 has the shape of a cylinder; in the present embodiment, the side wall section 34 has the shape of a circular cylinder. The side wall section 34 is arranged coaxially with the small-diameter section 21 and the large-diameter section 23. The diameter of the side wall section 34 is, for example, equal to the diameter of the large-diameter section 23.

[0042] In the present embodiment, the foreground section 30a, the bottom section 33 and the side wall section 34 have the same thickness, but may, for example, have different thicknesses.

[0043] The plastic element 40 is an element that is at least partially located within the lower housing 30 and covers a section (in particular the retaining section 52) of the conductor 50. It can also be said that the plastic element 40 holds the retaining section 52. The plastic element 40 is part of the structural elements that form the space 70. The plastic element 40 has an embedding section 41, a first cylindrical section 42, and a second cylindrical section 43.

[0044] The embedding section 41 is part of the plastic element 40 in which the conductor 50 (in particular the retaining section 52) is embedded. The embedding section 41 may, for example, partially protrude from the housing. The embedding section 41 has a through-hole in which the conductor 50 (in particular the retaining section 52) is arranged. The embedding section 41 forms part of the first cylindrical section 42.

[0045] The first cylindrical section 42, which is a section of the plastic element 40 located in the housing, is where the trigger 60 is positioned during intermittent operation (when no gas is generated by the igniter 10). This means that the first cylindrical section 42 is located between the housing and the trigger 60. The inner diameter of the first cylindrical section 42 is smaller than the inner diameter of the second cylindrical section 43.

[0046] The second cylindrical section 43, which is a section of the plastic element 40 arranged in the housing, is located at a height below the first cylindrical section 42. The diameter of the second cylindrical section 43 is larger than the diameter of the first cylindrical section 42. For example, the inner diameter d2 of the second cylindrical section 43 (see Fig. 2A) larger than the inner diameter d1 of the first cylindrical section 42 (see Fig. 2A). This allows the volume of the lower part of the space 70 to be increased. This reduces the pressure increase inside the housing caused by the gas generated by the detonator 10 and the subsequent downward movement of the push button 60, thus minimizing the deformation of the circuit breaker 1. It should be noted that the inner diameter d2 of the second cylindrical section 43 is smaller than the inner diameter d3 of the insulating element 110. This means that the inner diameters of the first cylindrical section 42, the second cylindrical section 43, the insulating element 110, and the lower housing 30 increase in ascending order.

[0047] The second cylindrical section 43 has an end 43a in its lower region. The end 43a is a section located within the lower housing 30 and is situated, for example, at a height below the elastic element 96. The end 43a is, for example, tapered with a downwardly increasing inner diameter, although the shape of the end 43a is not limited to this tapered form.

[0048] In this way, the pusher 60 moves within the space 70 formed by the first cylindrical section 42 and the second cylindrical section 43. It should be noted that the first cylindrical section 42 and the second cylindrical section 43 are not limited to having different inner diameters, but can have the same inner diameter.

[0049] The conductor 50 is an electrically conductive metal body that is partially located within the upper housing 20 and the lower housing 30. When the circuit breaker 1 is attached to a predetermined electrical circuit, the conductor 50 forms part of the electrical circuit and is also referred to as a busbar. The conductor 50 is a flat element that is held by the plastic element 40 and is positioned to cross the interior of the upper housing 20 and the lower housing 30. The conductor 50 has a disconnecting section 51 and a retaining section 52.

[0050] The cutting section 51, which is a section of the conductor 50 that is cut off by the push button 60 under the pressure of the gas generated by the detonator 10, is located in the initial position below the push button 60.

[0051] The retaining section 52 is a section of the conductor 50 that is connected to the disconnecting section 51 and held by the plastic element 40. The retaining section 52 is a section that does not overlap the push button 60 when viewed from above; for example, the retaining section 52 is a section that overlaps the plastic element 40 and, viewed from above, is a section located outside the housing. The retaining section 52 remains held by the plastic element 40 even after the disconnecting section 51 is cut off.

[0052] The conductor 50 can, for example, be made of a metal such as copper (Cu). It should be noted that the conductor 50 can also be made of a metal other than copper or of an alloy of copper and another metal. For example, the conductor 50 may contain manganese (Mn), nickel (Ni), platinum (Pt), or similar metals.

[0053] The push button 60 is positioned at a height below the detonator 10 and arranged so that it can move downwards. For example, if an anomaly occurs in the system, it moves downwards to cut the conductor 50 and interrupt the current flow through the electrical circuit as an emergency measure. Thus, the push button 60 is configured to cut the disconnect section 51 from the conductor 50 by absorbing the pressure of the gas generated by the detonator 10. In this way, the push button 60 is positioned in a first position between the disconnect section 51 and the detonator 10 (see Fig. 2A) and cuts off the separation section 51 and moves from the first position to a second position (see Fig. 2B), which is located below the first position. The second position is, for example, the position of the push button 60, which has moved downwards together with the separating section 51 until the separating section 51 comes into contact with the protruding section 30a.

[0054] The trigger 60 is formed, for example, from an insulating element such as a synthetic resin. In the present exemplary embodiment, the trigger 60 is formed from nylon. The trigger 60 has the shape of a circular column with an outer diameter corresponding to the inner diameter of the small-diameter section 21 of the upper housing 20. The trigger 60 has a recessed section 61, and the detonator 10 is arranged within the recessed section 61. It should be noted that the shape of the trigger 60 is not limited to the aforementioned shape and can be modified according to the shape, etc., of the upper housing 20 and the lower housing 30. The recessed section 61 is an upper section of the trigger 60 in which a downwardly directed recess is provided.Viewed from above, the recessed section 61 has a first section 62 with a diameter (for example, an inner diameter) larger than the diameter of the first cylindrical section 81 of the protective section 80, and a second section 63 located at a level below the first section 62, which has a diameter (for example, an inner diameter) larger than the diameter of the second cylindrical section 82. Viewed from above, the diameter of the first section 62 is larger than the diameter of the second section 63. In a cross-sectional view, for example, the inner wall of the first section 62 is tapered, with the diameter decreasing towards the second section 63; however, it may also have the shape of a staircase with progressively decreasing diameters.

[0055] The protective section 80 is a structural element for protecting the push button 60 from damage by the opening section 11a of the cover section 11 of the detonator 10 (see Fig. 2B), when the detonator 10 generates gas. In particular, the protective section 80 is an element that serves as a barrier for the opening section 11a, which can open wide to reduce the occurrence of the opening section 11a opening as a result of the gas generation by the detonator 10 and coming into contact with the trigger 60 and damaging the recessed section 61 of the trigger 60.

[0056] The protective section 80 is provided on the housing (for example, the upper housing 20) or the detonator 10 and has a portion that is located within the recessed section 61. In the present embodiment, the protective section 80 is provided on the housing (more precisely, on the small-diameter section 21). The protective section 80 is attached to the small-diameter section 21, for example, by welding, but the attachment method is not limited to welding.

[0057] As in Fig. 2A and Fig. As shown in Figure 2B, the protective section 80 has a first cylindrical section 81 and a second cylindrical section 82. The first cylindrical section 81 and the second cylindrical section 82 are formed in one piece.

[0058] The first cylindrical section 81, which forms a cylinder-shaped section surrounding the lateral side of the detonator 10, has a shape corresponding to the detonator 10. In the present exemplary embodiment, the first cylindrical section 81 is configured in the form of a staircase (for example, a two-step staircase) with a diameter (for example, an inner diameter) that decreases stepwise downwards in a cross-sectional view. It should be noted that the shape of the first cylindrical section 81 is not limited to this form; for example, the first cylindrical section 81 may be tapered with a downwardly decreasing diameter or may have another shape. The first cylindrical section 81 may be in at least partial contact with the detonator 10. The second cylindrical section 82 is arranged at the lower end of the first cylindrical section 81.

[0059] The first cylindrical section 81 has a flank section 83 on its upper surface. The flank section 83, which is an annular section (for example, a plate-shaped element) designed to project outwards from the upper end of the first cylindrical section 81 when viewed from above, is attached to the small-diameter section 21 by welding or the like. At least part of the flank section 83 is, for example, located between the first section 62 and the small-diameter section 21. Thus, the first cylindrical section 81 has a portion connected to and attached to the housing.

[0060] The second cylindrical section 82 is an annular part located at a height below the first cylindrical section 81 and has a diameter (for example, an inner diameter) that is smaller than the diameter of the first cylindrical section 81. The second cylindrical section 82 is a part that projects just from the lower end of the first cylindrical section 81 on the negative side of the Z-axis and comes into contact with the lid section 11 when the gas is generated. The lower end (the end located on the negative side of the Z-axis, i.e., for example, the bottommost end) of the second cylindrical section 82, when no gas is generated, is located at a height below (on the negative side of the Z-axis of) the lower end (the end located on the negative side of the Z-axis, i.e., for example, the bottommost end) of the lid section 11.

[0061] The protective section 80, for example, is made of a metal such as stainless steel (SUS), but can also be made of other metals such as aluminium or of a resin (for example, a resin that differs from that of the push button 60).

[0062] As in Fig. 2A and Fig. As shown in Figure 2B, the elastic elements 90, 92, 94, 96, which are elements with elasticity similar to rubber, are O-rings, each formed in the shape of a ring. Each of the elastic elements 90, 92, 94, 96 is arranged in a compressed (deformed) state.

[0063] The elastic element 90 is arranged in the space formed between the small-diameter section 21, the detonator 10, and the fastening element 100 for securing the detonator 10 within the recessed section 61. The elastic element 90 is in contact with the fastening element 100, the detonator 10, and the small-diameter section 21 and is, for example, pressed by the fastening element 100, the detonator 10, and the small-diameter section 21.

[0064] The elastic element 92 is positioned between the housing and the push button 60 and is designed to be pressed against the housing and against the outer surface of the push button 60. The elastic element 92 is arranged to extend along the outer surface of the push button 60. In the present exemplary embodiment, the elastic element 92 is arranged in the space formed between the housing (for example, the connecting section 22), the push button 60, and the plastic element 40, in order to prevent the interior of the recess section 61 and the space outside the interior (for example, the space between the push button 60 and the plastic element 40) from being spatially connected. The elastic element 92 reduces the escape of the gas generated by the igniter 10 into the space outside the interior of the recess section 61.This minimizes the pressure drop of the gas inside the recess section 61, which is caused by the gas generated by the igniter 10 escaping from the interior of the recess section 61.

[0065] In the present exemplary embodiment, the elastic element 92 is in contact (for example, surface contact) with the housing, the push button 60 and the plastic element 40 and is, for example, pressed through the housing, the push button 60 and the plastic element 40.

[0066] As in Fig. As shown in Figure 2A, the cross-sectional shape of the elastic element 92 in the compressed state is triangular, but the cross-sectional shape of the elastic element 92 is not limited to this shape. The shape of the cross-sectional shape of the elastic element 92 in the uncompressed state is not particularly restricted, as long as the interior of the recessed section 61 and the conductor 50 can be spatially separated after compression; this shape can be a circle, a polygon (e.g., a square), or an ellipse.

[0067] It should be noted that in the present description the term "pushing" includes not only a situation in which one element pushes on another element, but also a situation in which the other element pushes on the first or second element due to a repulsive force generated by elastic deformation of the first element.

[0068] The elastic element 94 is arranged in the space formed above the conductor 50 between the housing (e.g., the large-diameter section 23) and a circumferential recess formed on the plastic element 40, in order to prevent the external space and the space above the conductor 50 from being spatially connected. In the present exemplary embodiment, the elastic element 94 is arranged between the plastic element 40 and the large-diameter section 23 and is in contact with them, being pressed, for example, by the plastic element 40 and the large-diameter section 23.

[0069] The elastic element 96 is arranged in the space formed below the conductor 50 between the lower housing 30 (for example, the side wall section 34) and a circumferential recess formed on the plastic element 40, in order to spatially separate the external space and the space below the conductor 50. In the present exemplary embodiment, the elastic element 96 is located between the plastic element 40 and the side wall section 34 and is in contact with them, and is pressed, for example, by the plastic element 40 and the side wall section 34.

[0070] It should be noted that the elastic elements 94, 96 are not limited to being arranged without spacing in the circumferential recesses; a spacing may be formed in at least one of the upward and downward directions.

[0071] The insulating element 110 is an element with insulating properties located within the lower housing 30 and positioned at a height below the separating section 51. The shape of the insulating element 110 preferably follows the shape of the lower housing 30. For example, if the lower housing 30 has an inclined section (e.g., the bottom section 33), it is advantageous for the insulating element 110 to also have an inclined section (e.g., an inclined section of the second section 112). In the present exemplary embodiment, the insulating element 110 is provided along the inner surface of the lower housing 30 and is designed as a layer with a predetermined thickness. The thickness of the insulating element 110 can, for example, be less than the thickness of the lower housing 30.

[0072] The insulating element 110 has a first section 111 and a second section 112. The first section 111, which is a section of the insulating element 110 having a shape following the preceding section 30a, covers the inner surface of the preceding section 30a. The first section 111 is, for example, provided to cover the top of the preceding section 30a. In the present exemplary embodiment, the first section 111 is provided to contact the inner surface of the preceding section 30a. The second section 112 is located at a height below the first section 111 and covers the inner surface of the bottom section 33. In the present exemplary embodiment, the second section 112 is provided to have no contact with the bottom section 33 prior to a break operation. This creates a gap 72 (see Fig. 2A), located below the insulating element 110, is provided between the insulating element 110 and the lower housing 30 (e.g., the bottom section 33) (the underside of the second section 112 and the bottom section 33). The distance 72 is an example of the gap.

[0073] If the distance 72 is provided, the insulating element 110 can move (deform) to the distance 72 when the preceding section 30a deforms, which means that the insulating element 110 can be protected from damage caused by stresses. The second section 112 further covers the inner surface of a portion of the side wall section 34. Assuming that a portion of the second section 112, which is provided along the inner surface of the side wall section 34, is the end 113, the inner diameter d3 of the insulating element 110 is the distance in the Y-axis direction between the radially facing ends 113 in the example in Fig. 2A.

[0074] It should be noted that the size of the distance 72 can be determined according to the expected size of the deformable projection section 30a, for example by setting the height of the projection section 30a (its length in the Z-axis direction) greater than the height of the projection of the insulating element 110.

[0075] The first section 111 and the second section 112 are formed in one piece. The insulating element 110 is, for example, made of a plastic with insulating properties (for example, a synthetic plastic). The insulating element 110 is formed, for example, by molding the plastic.

[0076] It should be noted that the insulating element 110 can be realized by applying an insulating material to the inner surface of the lower housing 30. For example, the insulating element 110 can be formed by coating the inner surface of the lower housing 30 with an insulating material so that the inner surface of the lower housing 30 is covered. In this case, the insulating element 110 and the lower housing 30 are formed as a single piece.

[0077] As in Fig. 2A and Fig. As shown in Figure 2B, the plastic element 40 and the insulating element 110 cover the inner surface of the lower housing 30 before and after the interruption process. The plastic element 40 and the insulating element 110 can, for example, cover the inner surface of the lower housing 30 in such a way that the inner surface of the lower housing 30 is not exposed. The plastic element 40 and the insulating element 110 partially overlap in the radial direction. In particular, the end 113 of the insulating element 110 and the end 43a of the plastic element 40 overlap radially. More precisely, the lower end 43b of the end 43a of the plastic element 40 is located at a level below the upper end 113a of the end 113 of the insulating element 110. The lower end 43b is located along the circumference at a level below the upper end 113a. Since end 113 is provided outside end 43a, end 113 is located between end 43a and sub-housing 30.

[0078] It should be noted that, for example, end 113 and end 43a overlap by at least 1 mm in the Z-axis direction, and preferably by at least 3 mm, or even more preferably by at least 5 mm. The numerical values ​​1 mm, 3 mm, and 5 mm denote the lengths in the Z-axis direction.

[0079] Furthermore, a gap 74 is provided between end 113 and end 43a. The gap 74 can extend over the entire circumference or over a portion of the circumference. The gap 74 is a narrow space through which a high-temperature conductive gas generated by an electric arc during an interruption process can be cooled as it flows. The width of the gap 74 (which is the distance between end 113 and end 43a; in the example in Fig. 2A (the length in the Y-axis direction) is less than or equal to 1 mm and, for example, less than or equal to 0.5 mm. The width of the gap 74 is the average value of the distance between end 113 and end 43a along the circumference, but could also be the maximum value, the minimum value, the mode, the median, or the like of the distance.

[0080] Therefore, when the high-temperature conductive gas flows into the space 74, the conductive gas is cooled, which means that its conductivity can be reduced. The conductive gas exiting the space 74 has a reduced conductivity, so that even if the conductive gas comes into contact with the lower housing 30, the electric current cannot flow through the conductor 50.

[0081] It should be noted that the space 74 does not need to be provided. In other words, end 113 and end 43a can be in contact across the entire circumference.

[0082] Next, the configurations of the insulating element 110 and the lower housing 30 will be described with reference to Fig. 3A to Fig. 4C described in more detail. Fig. Figure 3A is a perspective view of the insulating element 110 according to the present exemplary embodiment, seen from above. Fig. Figure 3B is a front view of the insulating element 110 according to the present exemplary embodiment. Fig. Figure 3C is a perspective view of the insulating element 110 according to the present exemplary embodiment, seen from below. Fig. 3A is a schematic representation of the in Fig. 3B shows the insulating element 110, which was rotated around the Y-axis as the axis of rotation to obtain a perspective view of the insulating element 110 from above, and Fig. 3C is a schematic representation of the in Fig. 3B shows the insulating element 110, which was rotated around the Y-axis as the axis of rotation to obtain a perspective view of the insulating element 110 from below.

[0083] As in Fig. 3A to Fig. As shown in Figure 3C, the first section 111 of the insulating element 110 is a hollow, bottomless, truncated cone-shaped element. The second section 112 has: an end 113; and a section inclined to connect the end 113 and the first section 111. The inclined section tapers with an inner diameter that increases towards the end 113. The end 113 is a bottomless cylindrical element extending in the Z-axis direction.

[0084] Fig. Figure 4A is a perspective view of the lower housing 30 as seen from above according to the present exemplary embodiment. Fig. Figure 4B is a front view of the lower housing 30 according to the present exemplary embodiment. Fig. Figure 4C is a perspective view of the lower housing 30 according to the present exemplary embodiment as seen from below. Fig. 4A is a schematic representation of the in Fig. 4B shown sub-housing 30, which was rotated about the Y-axis as the axis of rotation to obtain a perspective view of the sub-housing 30 from above, and Fig. 4C is a schematic representation of the in Fig. 4B shown subcase 30, which was rotated around the Y-axis as the axis of rotation to obtain a perspective view of the subcase 30 from below.

[0085] As in Fig. 4A to Fig. As shown in Figure 4C, the projecting section 30a of the lower housing 30 is a hollow, truncated cone-shaped element without a bottom. The bottom section 33 is tapered, with the inner diameter increasing towards the side wall 34. The side wall 34 is a cylindrical element without a bottom, extending in the Z-axis direction. The length of the side wall section 34 in the Z-axis direction is greater than the length of the end 113 in the Z-axis direction. The inner diameter of the side wall section 34 is larger than the inner diameter d3 of the end 113. The side wall section 34 is configured to cover the end 113 from the outside. The fastening section 35, which is a section for fastening the upper housing 20 and the lower housing 30, projects upwards from the side wall section 34.The fastening section 35 is connected by welding or the like to a fastening section (not shown in the drawings) provided on the upper housing 20, so that it protrudes downwards.

[0086] As described above, the protective switch device 1 is configured such that the inner surface of the lower housing 30 is not exposed and plastic elements (plastic element 40 and insulating element 110) with insulating properties partially overlap in the radial direction. [Version 2]

[0087] The following describes the configuration of the circuit breaker device according to the present exemplary embodiment with reference to Fig. 5 to Fig. 6C described. Fig. Figure 5 is a cross-sectional view illustrating the configuration of the circuit breaker device 2 according to the present exemplary embodiment before an interruption operation. Fig. Figure 6A is a perspective view of the insulating element 210 according to the present exemplary embodiment, seen from above. Fig. Figure 6B is a front view of the insulating element 210 according to the present exemplary embodiment. Fig. Figure 6C is a perspective view of the insulating element 210 according to the present exemplary embodiment, seen from below. Fig. 6A is a schematic representation of the in Fig. 6B shows the insulating element 210, which was rotated around the Y-axis as the axis of rotation to obtain a perspective view of the insulating element 210 from above, and Fig. 6C is a representation of the in Fig. 6B shows the insulating element 210, which was rotated around the Y-axis as the axis of rotation to obtain a perspective view of the insulating element 210 from below.

[0088] It should be noted that the following description focuses on differences from embodiment 1 and that descriptions of details identical or similar to those of embodiment 1 are omitted or simplified. The circuit breaker device 2 according to the present exemplary embodiment differs from the circuit breaker device 1 according to embodiment 1 in that the lower housing 230 has a flat bottom without the protruding section 30a.

[0089] As in Fig. As shown in Figure 5, the protective switch device 2 has a sub-housing 230 instead of the sub-housing 30 of the protective switch device 1 and has an insulating element 210 instead of the insulating element 110.

[0090] The lower housing 230 has a plate-shaped section 230a, a bottom section 33, and a side wall section 34. The plate-shaped section 230a, the bottom section 33, and the side wall section 34 are formed in one piece.

[0091] The plate-shaped section 230a, which is a flat element, is disc-shaped in the present embodiment. The inner surface of the plate-shaped section 230a is flat.

[0092] As in Fig. 5 to Fig. As shown in Figure 6C, the insulating element 210 has a shape that follows the shape of the lower housing 230. The insulating element 210 has a first section 121 and a second section 112.

[0093] The first section 211 faces the plate-shaped section 230a and covers the inner surface of the plate-shaped section 230a. The first section 211, which is a flat element, is disc-shaped in the present embodiment. In the present embodiment, the first section 211 is positioned at a predetermined distance from the plate-shaped section 230a without touching it prior to an interruption operation.

[0094] The second section 212 is located at a height above the first section 211 and covers the inner surface of the bottom section 33 and part of the inner surface of the side wall section 34. In the present embodiment, the second section 112 is provided without contact with the bottom section 33 prior to an interruption operation.

[0095] Thus, a space 74 is provided between the insulating element 210 and the lower housing 230.

[0096] It should be noted that the present embodiment has so far described an example in which the end 113 of the insulating element 210 is arranged radially between the end 43a of the plastic element 40 and the lower housing 230, but the end of the plastic element can be arranged between the end of the insulating element and the lower housing.

[0097] A circuit breaker device configured as just described is described in the following variant. [Variation of embodiment 2]

[0098] The following describes the configuration of the circuit breaker device according to the present variation with reference to Fig. 7 and Fig. 8 described. Fig. Figure 7 is a cross-sectional view illustrating the configuration of the circuit breaker device 2a according to the present variation prior to an interruption operation.

[0099] Fig. Figure 8 is a front view of the insulating element 210a according to the present variant.

[0100] As in Fig. As shown in Figure 7, the circuit breaker device 2a has: an insulating element 210a instead of the insulating element 210 of the circuit breaker device 2; and a plastic element 40 having an end 243a instead of the end 43a. As described above, the circuit breaker device 2a is configured such that the end 243a of the plastic element 40 is positioned between the end 213a of the insulating element 210a and the lower housing 230.

[0101] The end 243a has an inclined surface, the outside of which comes into contact with the lower housing 230 and the inside of which is inclined.

[0102] As in Fig. 7 and Fig. As shown in Figure 8, the insulating element 210a has a shape that follows the shape of the lower housing 230 and the end 243a. The insulating element 210a has a first section 211 and a second section 212a.

[0103] The second section 212a is located at a height around the first section 211 and covers the inner surface of the bottom section 33 and the inner surface (sloping surface) of the end 243a. In the present exemplary embodiment, the second section 212a is configured such that it does not touch the bottom section 33, and the end 213a touches the inner surface of the end 243a before any interruption process. The end 213a has a shape that follows the shape of the inner surface of the end 243a and touches the inner surface of the end 243a over its entire circumference. The end 213a tapers with an inner diameter that decreases towards the top.

[0104] As described above, the circuit breaker device 2a is configured such that the inner surface of the lower housing 230 is not exposed and the plastic elements (plastic element 40 and insulating element 210a) with insulating properties partially overlap in a radial direction outwards in the sequence insulating element 210a and plastic element 40. [Version 3]

[0105] The following describes the configuration of the circuit breaker device according to the present exemplary embodiment with reference to Fig. 9 to Fig. 10B described. Fig. Figure 9 is a cross-sectional view illustrating the configuration of the circuit breaker device 3 according to the present exemplary embodiment before an interruption operation. Fig. Figure 10A is a perspective view of the insulating element 310 according to the present exemplary embodiment seen from above. Fig. Figure 10B is an exploded view of the insulating element 310 according to the present exemplary embodiment as seen from above.

[0106] It should be noted that the following description focuses on differences compared to embodiment 1, and descriptions of details that are identical or similar to those in embodiment 1 are omitted or simplified. The circuit breaker device 3 according to the present embodiment differs from the circuit breaker device 1 according to embodiment 1 in that the insulating element 310 is formed from a plurality of elements.

[0107] As in Fig. As shown in Figure 9, the protective switch device 3 has an insulating element 310 instead of the insulating element 110 contained in the protective switch device 1.

[0108] As in Fig. 9 to Fig. As shown in Figure 10B, the insulating element 310 comprises a first element 320 and a second element 330. The first element 320 and the second element 330 are separate elements. The term "separate elements" here means that the first element 320 and the second element 330 are physically separate from each other. The term "separate elements" can also mean that the first element 320 and the second element 330, being separate elements, are not fixed together. Furthermore, the term "separate elements" can mean that the first element 320 and the second element 330 are manufactured separately in a manufacturing process. The first element 320 covers the protruding section 30a of the lower housing 30. For example, the first element 320 covers the top of the protruding section 30a. The first element 320 has a shape that follows the preceding section 30a, and the cross-sectional shape of the first element 320 is the shape of a letter U rotated 180 degrees.One end of the first element 320 is a free end and can be deformed by the tension from the pusher 60.

[0109] The second element 330 covers the bottom section 33 of the lower housing 30. The second element 330 covers the bottom section 33 and partially covers the side wall section 34 and the projecting section 30a. The second element 330 has a shape that mainly follows the bottom section 33 and the side wall section 34, and the cross-sectional shape of the second element 330 has two U-shaped sections.

[0110] The second element 330 is arranged such that it overlaps part of the first element 320 in a radial direction. Thus, the inner surface of the lower housing 230 can be protected from exposure even when the insulating element 310 is formed from the first element 320 and the second element 330, which are separate elements.

[0111] The second element 330 is not in contact with the first element 320 in the overlapping area. In other words, a gap 76 is provided between the first element 320 and the second element 330. Similar to the gap 74, the gap 76 is a narrow space through which high-temperature conductive gas generated by an electric arc during an interruption process can be cooled as it flows. Since the second element 330 is not in contact with the first element 320, the voltage exerted on the first element 320 by the actuator 60 is also prevented from being transferred to the second element 330. This means that the second element 330 is protected from damage caused by the voltage from the actuator 60.

[0112] The second element 330 has an end 113, and the end 113 forms an end of the insulating element 310.

[0113] As in Fig. 10A and Fig. As shown in Figure 10B, the first element 320 and the second element 330 can be attached and removed. The first element 320 is, for example, simply positioned above the second element 330. In other words, the first element 320 is simply arranged above the second element 330 in such a way that it covers the opening 331 formed on the top of a section of the second element 330 that projects into the interior. [Method for manufacturing a circuit breaker device]

[0114] Next, the method for manufacturing the circuit breaker device according to each of the exemplary embodiments or the like, configured as described above, will be described with reference to Fig. 11 described.

[0115] Fig. Figure 11 is a flowchart illustrating a manufacturing process of the circuit breaker device 1 according to embodiment 1. Fig. Figure 11 illustrates the manufacturing process of the circuit breaker device 1 according to embodiment 1, but the same applies to the circuit breaker devices 2, 2a, 3 according to the other exemplary embodiments and variations.

[0116] As in Fig. As shown in Figure 11, the upper housing 20 is manufactured from plastic or metal by plastic or metal forming or the like (S10), the lower housing 30 is manufactured from metal by metal forming or the like (S20), and the insulating element 110 is manufactured from plastic or the like (S30). It should be noted that the sequence of steps S10 to S30 can be changed and that at least two of steps S10 to S30 can be performed simultaneously.

[0117] Next, the upper housing 20 and the lower housing 30 are attached (S40). For example, the upper housing 20 and the lower housing 30 are joined together by welding or the like, housing the detonator 10, the plastic element 40, the conductor 50, the push button 60, the protective section 80, the elastic elements 90, 92, 94, 96, and the insulating element 110. At this point, the upper housing 20 and the lower housing 30, with the insulating element 110 housed within them, are seamlessly joined together so that they cover the inner surface of the lower housing 30. This creates the circuit breaker device 1 described above. [Further examples]

[0118] The protective switch devices according to one or more aspects have previously been described on the basis of exemplary embodiments, etc., but the present disclosure is not limited to these exemplary embodiments, etc. Various modifications of the present exemplary embodiments and forms, configured by combining structural elements in different exemplary embodiments that can be conceived by those skilled in the art in this field, may be included in the present disclosure, provided that they do not deviate from the essence of the present disclosure.

[0119] The sequence of steps in the method for manufacturing the circuit breaker device described above can be changed. Furthermore, the steps of the method for manufacturing the circuit breaker device described in the exemplary embodiments above can be carried out in a single step or in separate steps. It should be noted that the expression "the steps are carried out in a single step" encompasses a situation in which the steps are carried out using a single device, a situation in which the steps are carried out sequentially, and a situation in which the steps are carried out at the same location.The term “separate steps” is intended to include a situation in which the steps are carried out using separate devices, a situation in which the steps are carried out at different times (for example, on different days), and a situation in which the steps are carried out in different places. Industrial applicability

[0120] The present disclosure is useful in protective switch devices arranged in an electrical circuit, etc. List of reference symbols 1, 2, 2a, 3 Circuit breaker device 10 detonators 11 Cover section 11a Opening section 20 upper housings 21 Small diameter section 22 Connecting section 23 Large diameter section 30, 230 Lower housing (cover element) 30a preceding section 33 Floor section 34 Side wall section 35 Fastening section 40 plastic elements 41 Embedding section 42, 81 first cylindrical section 43, 82 second cylindrical section 43a, 113, 213a, 243a End 43b lower end 50 ladders 51 Separation section 52 Stop section 60 push buttons 61 In-depth section 62, 111, 211 first section 63, 112, 212, 212a second section 70 space 72 Spacing (gap) 74, 76 distance 80 Protection section 83 Flank section 90, 92, 94, 96 elastic element 100 fastening elements 110, 210, 210a, 310 Insulating element 113a upper end 230a plate-shaped section 320 first element 330 second element 331 Opening d1, d2, d3 inner diameter QUOTES INCLUDED IN THE DESCRIPTION

[0000] This list of documents cited by the applicant was automatically generated and is included solely for the reader's convenience. The list is not part of the German patent or utility model application. The DPMA accepts no liability for any errors or omissions. Cited patent literature

[0000] WO 2018 / 003594

[0003]

Claims

[1] A protective switch device comprising: an igniter configured to generate gas; a push button located at a height below the detonator; a conductor having a separating section located below the push button, and a holding section that is connected to the separating section; a cover element that is positioned at a height below the separation section and is made of metal; an insulating element arranged within the cover element and positioned at a height below the separation section; and a plastic element that is at least partially arranged within the cover element and configured to hold the retaining section, wherein the push button is configured to cut off the separation section from the conductor by receiving the pressure of the gas generated by the detonator, the plastic element and the insulating element cover an inner surface of the cover element, one end of the insulating element and one end of the plastic element overlap each other, and a lower end of the end of the plastic element is positioned at a height below an upper end of the end of the insulating element. [2] The protective switch device according to claim 1, wherein the end of the insulating element is arranged between the end of the plastic element and the cover element. [3] The protective switch device according to claim 1, wherein the end of the plastic element is arranged between the end of the insulating element and the cover element. [4] The protective switch device according to one of claims 1 to 3, wherein the cover element has a protruding section that is arranged below the insulating element, and The preceding section protrudes upwards and is pressed by the push button. [5] The protective switch device according to one of claims 1 to 4, wherein a gap is provided between the cover element and the insulating element, and the gap is arranged below the insulating element. [6] The protective switch device according to claim 4, wherein A gap is provided between the cover element and the insulating element. the insulating element has: a first section that covers a top side of the protruding section of the cover element; and a second section, which is located at a height below the first section, wherein the second section covers an inner surface of a bottom section of the cover element, and the gap is arranged between the bottom section of the cover element and the underside of the second section. [7] The protective switch device according to claim 4, wherein the insulating element comprises: a first element that covers a top side of the protruding section of the cover element; and a second element that is arranged in such a way that it partially overlaps the first element, wherein the second element covers an inner surface of a bottom section of the cover element, and the first element and the second element are separate elements. [8] The protective switch device according to any one of claims 1 to 7, wherein the plastic element comprises: an embedding section in which the holding section is embedded; a first cylindrical section in which the push button is arranged; and a second cylindrical section, which is arranged at a height below the first cylindrical section and has a diameter larger than the diameter of the first cylindrical section, and The inner diameter of the second cylindrical section is smaller than the inner diameter of the insulating element.

Images