Cutting device

Abstract

A cutting device (1) is provided with: a housing (20, 30) having a convex part (30a); an igniter (10) capable of generating gas; a pusher (60) located below the igniter; and a conductor (50) having a separation part (51) which is located inside the housing and below the pusher, and which is separated by the pusher that receives the pressure of the gas generated by the igniter. The protruding portion of the housing is located below the separating portion and protrudes upward, and the protruding portion of the housing deforms downward by being pressed by the pusher.

Description

Technical Field

[0001] The present disclosure relates to a cutting device. Background Art

[0002] Conventionally, a cutting device used in connection with an electric circuit has been known. As such a cutting device, a cutting device having the following structure has been disclosed: a gas generating portion (igniter), a current-carrying member (conductor) forming a part of an electric circuit, and a blade (thruster). The blade is caused to move at high speed toward the current-carrying member by the gas generated by the gas generating portion to cut the current-carrying member (see Patent Document 1).

[0003] Prior Art Documents

[0004] Patent Documents

[0005] Patent Document 1: Japanese Unexamined Patent Application Publication No. 2012-138247 Summary of the Invention

[0006] Sometimes other devices are arranged around the cutting device, and there is a case where it is desired that the outer shape of a housing accommodating the conductor and the thruster does not deform when the conductor is cut by the thruster.

[0007] The present disclosure provides a cutting device capable of suppressing deformation of the outer shape of the housing when the conductor is cut by the thruster.

[0008] A cutting device according to an aspect of the present disclosure is configured to include: a housing having a first convex portion; an igniter capable of generating gas; a thruster located below the igniter; and a conductor having a separation portion located inside the housing and below the thruster, the separation portion being separated by the thruster that is subjected to the pressure of the gas generated by the igniter. The first convex portion of the housing is located below the separation portion and protrudes upward, and the first convex portion of the housing is deformed downward by being pressed by the thruster.

[0009] According to an aspect of the present disclosure, it is possible to suppress deformation of the outer shape of the housing when the conductor is cut by the thruster. Brief Description of the Drawings

[0010] Figure 1A It is a front view showing the cutting device of Embodiment 1.

[0011] Figure 1B It is a perspective view showing the cutting device of Embodiment 1.

[0012] Figure 2 It is a cross-sectional view showing the cutting device of Embodiment 1.

[0013] Figure 3 This is a diagram for explaining the cutting operation of the cutting device of Embodiment 1.

[0014] Figure 4 This is a flowchart showing the manufacturing process of the cutting device of Embodiment 1.

[0015] Figure 5 This is a perspective view showing the cutting device of Embodiment 2.

[0016] Figure 6 This is a sectional view showing the cutting device of Embodiment 2.

[0017] Figure 7 This is a sectional view showing the first example of various modification examples of the lower housing of each embodiment.

[0018] Figure 8 This is a sectional view showing the second example of various modification examples of the lower housing of each embodiment.

[0019] Figure 9 This is a sectional view showing the third example of various modification examples of the lower housing of each embodiment.

[0020] Figure 10 This is a sectional view showing the first example of a modification example of the cutting device of each embodiment.

[0021] Figure 11 This is a sectional view showing the second example of a modification example of the cutting device of each embodiment.

[0022] Figure 12 This is a sectional view showing the third example of a modification example of the cutting device of each embodiment.

[0023] Figure 13 This is a sectional view showing the fourth example of a modification example of the cutting device of each embodiment.

[0024] Figure 14 This is a diagram for explaining the cutting operation of the cutting device of the fourth example of the modification example. Specific Embodiment

[0025] A cutting device according to one aspect of the present disclosure includes: a housing having a first convex portion; an igniter capable of generating gas; a pusher located below the igniter; and a conductor having a separation portion that is located inside the housing and below the pusher and is separated by the pusher that receives the pressure of the gas generated by the igniter. The first convex portion of the housing is located below the separation portion and protrudes upward, and the first convex portion of the housing is deformed downward by being pressed by the pusher.

[0026] Thus, the first protrusion is pressed by the pusher that moves downward by the pressure of the gas generated by the igniter and deforms downward. That is, the first protrusion can absorb the stress from the pusher by deforming downward, thereby suppressing the case from bulging due to the stress from the pusher. Therefore, according to the cutting device of one embodiment of the present disclosure, when the conductor is cut by the pusher, the stress from the pusher is absorbed by the first protrusion, thereby suppressing the deformation of the outer shape of the case.

[0027] Furthermore, for example, it is preferable that the first protrusion of the housing tapers toward the upper side.

[0028] Thus, since the right-angled portion in the first convex portion can be reduced, local concentration of stress can be suppressed.

[0029] Furthermore, for example, it is preferable that, before the separation portion is separated from the conductor, a distance between a front end portion of the first protrusion of the housing and the separation portion is smaller than a length of the pusher in the up-down direction.

[0030] Thus, when the conductor is cut by the pusher, the insulation distance between the cut surfaces of the conductor can be lengthened, thereby preventing arcs from being generated when the conductor is cut.

[0031] In addition, for example, preferably, the shell has a first retaining member, and the first retaining member has: a first bottom; and the first protrusion protruding upward from the first bottom, when the first protrusion is pressed by the pusher, the first bottom of the first retaining member is deformed.

[0032] Thus, the bottom portion connected to the first protrusion is also deformed in conjunction with the deformation of the first protrusion, so that it is possible to suppress the concentration of stress on the first protrusion. Therefore, it is possible to prevent the housing from being damaged.

[0033] Furthermore, for example, it is preferable that the first protrusion has a first wall portion extending upward from the first bottom portion, and the first wall portion is cylindrical.

[0034] Thus, since the first protrusion has the cylindrical first wall portion which is a structure that is easily crushed, the stress of the pusher can be effectively absorbed. Therefore, the outer shape of the housing can be further suppressed from being deformed.

[0035] For example, preferably, the first projection has a first wall extending upward from the first bottom, the first holder has a recessed portion in a bottom view, and the first wall of the first projection forms an inner surface of the recessed portion.

[0036] Thus, since a part of the housing also serves as the first convex portion, it is possible to suppress deformation of the outer shape of the housing without adding another component.

[0037] In addition, for example, preferably, the first holder further includes a side wall portion, the side wall portion and the first protrusion portion are connected via the first bottom portion, and when the first protrusion portion of the housing is pressed by the pusher, the side wall portion of the first holder is deformed.

[0038] Thus, the side wall portion connected to the first protrusion via the first bottom portion is also deformed in conjunction with the deformation of the first protrusion, so that stress concentration on the first protrusion can be further suppressed. Therefore, damage to the housing can be further prevented.

[0039] In addition, for example, preferably, the first retainer further includes a side wall portion, the side wall portion and the first protrusion portion are connected via the first bottom portion, and at least a portion of an outer surface of the first bottom portion is inclined upward from the first protrusion portion toward the side wall portion.

[0040] Thus, since the first bottom portion has the portion inclined upward, deformation of the outer shape of the housing can be suppressed.

[0041] In addition, for example, preferably, the first retainer further includes a side wall portion, the side wall portion and the first protrusion portion are connected via the first bottom portion, and at least a portion of an inner surface of the first bottom portion is inclined upward from the first protrusion portion toward the side wall portion.

[0042] Thus, since the pressure applied to the inside of the housing can be dispersed, deformation of the outer shape of the housing can be suppressed.

[0043] In addition, for example, preferably, the first retaining member also has a side wall portion, the side wall portion and the first protrusion are connected via the first bottom portion, and the first bottom portion has: a connecting portion, which is connected to the first protrusion; and an inclined portion, which connects the connecting portion and the side wall portion, and the outer surface and the inner surface are respectively inclined upward as they go from the connecting portion toward the side wall portion.

[0044] This makes it possible to disperse the pressure inside the housing and suppress deformation of the outer shape of the housing.

[0045] In addition, for example, it is preferred that the housing further includes a second holder, the second holder is located below the first holder, and the first holder and the first protrusion are formed integrally.

[0046] Thus, since at least a part of the stress from the pushing member can be absorbed by the first holding member, it is possible to suppress the deformation of the second holding member that forms the outer contour of the cutting device. Therefore, it is possible to suppress the deformation of the outer shape of the housing.

[0047] Further, for example, it is preferable that the second holding member has a second convex portion protruding upward, and the second convex portion is located below the first convex portion of the first holding member.

[0048] Thus, since the second convex portion can absorb the stress that cannot be absorbed by the first convex portion through deformation, it is possible to suppress the swelling of the second holding member. That is, it is possible to suppress the deformation of the outer shape of the housing.

[0049] Further, for example, it is preferable that the second holding member has: a second bottom portion; and the second convex portion protruding upward from the second bottom portion, and the second convex portion has a second wall portion extending upward from the second bottom portion, and the second wall portion is arranged along the first wall portion.

[0050] Thus, since the first convex portion and the second convex portion are arranged overlappingly, it is possible to effectively absorb the stress from the pushing member by the double-layer overlapping convex portions. Therefore, it is possible to effectively suppress the deformation of the outer shape of the housing.

[0051] Further, for example, it is preferable that the conductor further has a holding portion adjacent to the separation portion, and after the pushing member separates the separation portion, the upper end of the pushing member is located above the cutting surface between the holding portion and the separation portion.

[0052] Thus, since the pushing member is in a position above the holding portion and the arc path becomes longer, it is possible to effectively cut the arc.

[0053] Further, for example, it is preferable that when the pushing member pushes the first convex portion downward and the pushing member is stationary, the distance between the lower end of the pushing member and the lower end of the cutting surface of the holding portion is equal to or greater than the distance between the upper end of the pushing member and the upper end of the cutting surface of the holding portion.

[0054] Thus, since the pushing member does not pass over the cutting surface of the conductor excessively, it is possible to make the arc path longer and effectively cut the arc after the pushing member becomes stationary.

[0055] In addition, for example, it is preferred that there is also a resin component covering the conductor, the resin component having: an embedded portion, the conductor is embedded in the embedded portion; a first barrel portion, the thruster is arranged inside the first barrel portion; and a second barrel portion, which is located below the first barrel portion, the inner diameter of the first barrel portion is smaller than the inner diameter of the second barrel portion, and when the thruster pushes the first protrusion downward and the thruster is stationary, the upper end of the thruster is adjacent to the first barrel portion, and the lower end of the thruster is adjacent to the second barrel portion.

[0056] Thus, after the pusher is stationary, the lower end of the pusher can be located in the space formed by the second cylindrical portion with a larger volume. That is, after the pusher is stationary, the separated portion cut by the pusher can be located in the space. The volume of the space is large, and the internal pressure generated by the arc can be reduced, so according to the cutting device, the pressure applied to the housing can be reduced.

[0057] In addition, for example, it is preferred to include: a shell; an igniter that can generate gas; a conductor that has a separation portion located inside the shell; a thruster that is located below the igniter and separates the separation portion from the conductor by bearing the pressure of the gas generated by the igniter; and a hollow member that is located inside the shell and below the separation portion, has a hollow interior, and the separation portion is located below the thruster. When the hollow member is pressed by the thruster, the hollow member deforms downward.

[0058] Thus, since the stress from the thruster can be absorbed by the hollow member as another member, deformation of the outer shape of the housing can be suppressed.

[0059] Hereinafter, embodiments will be described in detail with reference to the drawings.

[0060] In addition, the embodiments described below all represent general or specific examples. The numerical values, shapes, constituent elements, configuration positions of constituent elements, connection methods, steps (processes), and the order of the order of steps (processes) shown in the following embodiments are examples and are not intended to limit the present disclosure. In addition, the constituent elements of the following embodiments that are not recorded in the independent claims are described as arbitrary constituent elements.

[0061] In addition, each figure is a schematic diagram and may not be a strict illustration. Therefore, for example, the scales in each figure may not be consistent. In addition, in each figure, the same reference numerals are marked for substantially the same structure, and repeated descriptions are omitted or simplified.

[0062] In addition, in this specification and the accompanying drawings, the X-axis, Y-axis, and Z-axis represent the three axes of a three-dimensional orthogonal coordinate system of a right-handed system. In each embodiment, the moving direction of the pusher is set as the Z-axis direction. In addition, in this specification, "looking down" means observing the cutting device from the Z-axis direction, and the side means the direction orthogonal to the Z-axis direction. In addition, in this specification, the Z-axis direction is also referred to as the up-down direction. However, in this specification, the up-down direction of the cutting device is only used to facilitate the description of each embodiment to represent the relative positional relationship of the elements in the cutting device. For example, in this specification, terms such as "above" and "below" do not refer to the absolute upward direction (vertically upward) and downward direction (vertically downward) in spatial perception, but are used as terms defined by the relative positional relationship based on the moving direction of the pusher. In addition, the posture when setting the cutting device is not limited to the direction shown in the accompanying drawings.

[0063] In addition, in this specification, terms indicating the relationality between elements such as equal and parallel, terms indicating the shape of elements such as trapezoid and cylinder, and numerical values and numerical ranges are not expressions indicating only strict meanings, but mean expressions including substantially equivalent ranges, for example, a difference of about several percent (for example, about 10%).

[0064] In addition, in this specification, unless otherwise specified, ordinal numbers such as "first" and "second" do not mean the quantity or order of the components, but are used for the purpose of avoiding confusion of the same type of components and making distinctions.

[0065] (Embodiment 1)

[0066] Hereinafter, Figures 1A to 4 the cutting device of this embodiment will be described.

[0067] [1-1. Structure of the cutting device]

[0068] First, Figures 1A to 2 the structure of the cutting device of this embodiment will be described. Figure 1A is the front view showing the cutting device 1 of this embodiment. Figure 1B is the perspective view showing the cutting device 1 of this embodiment. Figure 2 is the cross-sectional view showing the cutting device 1 of this embodiment. The front view is a view obtained by observing the cutting device 1 from a direction intersecting with the up-down direction, Figure 1A is a view obtained by observing the cutting device 1 from the X-axis direction. In addition, the cross-sectional view is a view showing the cross-section when the cutting device 1 is cut along the YZ plane.

[0069] As Figures 1A to 2As shown, the cutting 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 cutting device 1 is a device that is mounted on an object having a circuit and is used to prevent the damage caused by an abnormality from becoming larger by operating and cutting off the circuit when an abnormality occurs in the circuit, system, etc. within the object. The cutting device 1 is mounted, for example, on a vehicle as an example of the object, is connected between a motor and a battery for driving the motor (such as a lithium-ion battery), 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. In addition, the object may be an object other than a vehicle, and examples thereof include household electrical appliances, a solar power generation system, etc., but there is no particular limitation.

[0070] The igniter 10 is an electronic igniter having a gunpowder portion and a conductive pin. The gunpowder portion has ignition powder, and the conductive pin is used to energize the gunpowder portion. During operation, a working current for igniting the ignition powder is supplied from an external power source to the conductive pin, whereby the ignition powder ignites and burns, generating gas (combustion gas).

[0071] The igniter 10 is fixed to the small-diameter portion 21 above the upper housing 20.

[0072] The upper housing 20 and the lower housing 30 are members that constitute the outer contour of the cutting device 1 and house a part of the igniter 10, the resin member 40, a part of the conductor 50, and the pusher 60. In addition, 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 linearly formed space in which the pusher 60 can move. The pusher 60 is housed on the upper end side (positive Z-axis side) in the vertical direction (Z-axis direction) of the space 70.

[0073] The upper housing 20 and the lower housing 30 are each formed of a metal such as stainless steel (SUS), but may also be formed of other metals such as aluminum. In addition, the upper housing 20 and the lower housing 30 have a cylindrical outer shape, but the shape is not limited thereto. In addition, 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 an example of the housing.

[0074] The upper housing 20 is, for example, a cylinder member having a stepped cylindrical shape, and its inside is hollow. The upper housing 20 has a small-diameter portion 21 located above, a large-diameter portion 23 located below, and a connecting portion 22 that connects the small-diameter portion 21 and the large-diameter portion 23. The small-diameter portion 21 and the large-diameter portion 23 are coaxially arranged, and the diameter of the large-diameter portion 23 is larger than the diameter of the small-diameter portion 21.

[0075] The lower housing 30 is a member having a bottomed cylindrical shape with a hollow interior, and has a convex portion 30a protruding upward. Specifically, the lower housing 30 has a front end portion 31, a wall portion 32, a bottom portion 33, and a side wall portion 34, and the front end portion 31 and the wall portion 32 form the convex portion 30a. The front end portion 31, the wall portion 32, the bottom portion 33, and the side wall portion 34 are formed integrally. The lower housing 30 is an example of a first holder.

[0076] In addition, in this specification, integrally formed means that each component is formed of the same material, formed at the same time, and is the same object.

[0077] The convex portion 30a is configured to be located below the separation portion 51 and to protrude upward. The convex portion 30a is connected to one end of the bottom portion 33 and protrudes upward (on the positive side of the Z axis) from the bottom portion 33. The convex portion 30a is configured to be pushed and deformed downward by the thrust member 60 that moves downward using the gas generated by the igniter 10. For example, the convex portion 30a is configured to deform such that the front end portion 31 moves downward, or the convex portion 30a (front end portion 31) is flattened, or the convex portion 30a (front end portion 31) is compressed and concave, or the convex portion 30a as a whole drops downward, or the height of the convex portion 30a is reduced. In other words, the convex portion 30a has the function of absorbing the impact (stress) from the thrust member 60 by deformation.

[0078] In addition, when the cutting device 1 is observed (looked up) from the negative side of the Z axis toward the positive side of the Z axis, the convex portion 30a forms a concave portion of the lower housing 30. The convex portion 30a is exposed. In the present embodiment, the convex portion 30a has a shape that tapers toward the top as it goes upward, but the shape is not limited to this. Other shapes and structures of the convex portion 30a are described in the "(Various Modifications of Each Embodiment)" described later.

[0079] The front end portion 31 is a flat plate-shaped portion located above the convex portion 30a. The front end portion 31 is a portion that contacts the separation portion 51 during the cutting operation. Since the front end portion 31 is planar and can bear the stress from the pusher 60 with the surface, stress concentration can be suppressed compared to a sharp case.

[0080] In addition, in this specification, contact may refer to direct contact between two components, or indirect contact via other components arranged between the two components. For example, contact here may refer to direct contact between the front end portion 31 and the separation portion 51, or indirect contact via other components arranged between the front end portion 31 and the separation portion 51. For example, an arc extinguishing agent may be arranged between the front end portion 31 and the separation portion 51, or the separation portion 51 may be arranged between the front end portion 31 and the thruster 60. In addition, indirect contact means that the stress from one of the front end portion 31 and the separation portion 51 to the other can be transmitted with the help of other components.

[0081] The wall portion 32 is a portion of the convex portion 30a that extends upward from the bottom portion 33. The wall portion 32 is a portion that connects the front end portion 31 and the bottom portion 33 and has a predetermined inclination with respect to the front end portion 31. The wall portion 32 is conical (a bottomless conical cylindrical shape) with its tip tapering as it approaches the front end portion 31. For example, the cross-sectional shape of the convex portion 30a is trapezoidal. Since the wall portion 32 is cylindrical, the convex portion 30a has a structure that is more easily flattened compared to, for example, the case where it is columnar. In addition, the wall portion 32 is arranged coaxially with the small-diameter portion 21 and the large-diameter portion 23. In addition, the wall portion 32 forms the inner surface of the concave portion when viewed from above. The wall portion 32 is an example of the first wall portion.

[0082] The bottom portion 33 connects the convex portion 30a and the side wall portion 34. In other words, the convex portion 30a and the side wall portion 34 are connected via the bottom portion 33. The outer surface and the inner surface of the bottom portion 33 slope upward from the convex portion 30a toward the side wall portion 34. In addition, the bottom portion 33 slopes in the direction opposite to that of the wall portion 32. The bottom portion 33 is an example of the first bottom portion.

[0083] The side wall portion 34 is formed to be connected to the other end of the bottom portion 33 and extends upward from the bottom portion 33. The side wall portion 34 has a cylindrical shape and has a cylindrical shape in the present embodiment. The side wall portion 34 is arranged coaxially with the small-diameter portion 21 and the large-diameter portion 23. For example, the diameter of the side wall portion 34 is equal to the diameter of the large-diameter portion 23.

[0084] The thicknesses of the front end portion 31, the wall portion 32, the bottom portion 33, and the side wall portion 34 are the same, but they may be different from each other, for example.

[0085] The resin member 40 is a member that covers a part of the conductor 50. In addition, the resin member 40 forms a space 70. The resin member 40 has a buried portion 41, a first cylindrical portion 42, and a second cylindrical portion 43.

[0086] The buried portion 41 is the part of the resin member 40 that buries the conductor 50. For example, the buried portion 41 is partially exposed from the housing. A through hole for arranging the conductor 50 (specifically, the holding portion 52) is formed in the buried portion 41.

[0087] The first cylindrical portion 42 is the part of the resin member 40 that is arranged inside the housing. When the cutting operation is not performed (when gas is not generated by the igniter 10), the pusher 60 is arranged inside the first cylindrical portion 42. The inner diameter of the first cylindrical portion 42 is smaller than the inner diameter of the second cylindrical portion 43. In addition, Figure 2 The position of the pusher 60 shown represents the initial position when the cutting operation is not performed.

[0088] The second cylindrical portion 43 is the portion of the resin member 40 disposed inside the housing, and is located below the first cylindrical portion 42. The inner diameter of the second cylindrical portion 43 is larger than the inner diameter of the first cylindrical portion 42. Thereby, the volume of the lower side in the space 70 can be enlarged. Therefore, it is possible to suppress an increase in the pressure inside the housing due to the gas generated by the igniter 10 and the movement of the pusher 60 caused by the gas, and thus it is possible to suppress deformation of the cutting device 1.

[0089] The pusher 60 moves within the space 70 formed by the first cylindrical portion 42 and the second cylindrical portion 43 in this way. In addition, the first cylindrical portion 42 and the second cylindrical portion 43 are not limited to the case where the inner diameters are different, and the inner diameters may also be the same.

[0090] The conductor 50 is a conductive metal body located inside the upper housing 20 and the lower housing 30. In addition, the conductor 50 forms a part of the circuit when the cutting device 1 is installed in a predetermined circuit, and is also called a bus bar. The conductor 50 is a flat member configured to be held by the resin member 40 and traverse the inside of the upper housing 20 and the lower housing 30. The conductor 50 has a separation portion 51 and a holding portion 52.

[0091] The conductor 50 can be formed of a metal such as copper (Cu), for example. However, the conductor 50 can be formed of a metal other than copper or an alloy of copper and other metals. For example, the conductor 50 can also be configured to contain manganese (Mn), nickel (Ni), platinum (Pt), etc.

[0092] The separation portion 51 is the portion of the conductor 50 separated by the pusher 60 that bears the pressure of the gas generated by the igniter 10, and is located below the pusher 60 in the initial position.

[0093] The holding portion 52 is the portion of the conductor 50 held by the resin member 40. The holding portion 52 is a portion that does not overlap the pusher 60 in a top view, for example, a portion that overlaps the resin member 40 in a top view and a portion located outside the housing. The holding portion 52 maintains the state of being held by the resin member 40 even after the separation portion 51 is separated.

[0094] The pusher 60 is located below the igniter 10, is configured to be movable downward, and cuts off the conductor 50 and emergently cuts off the conduction in the circuit by moving downward in case of an abnormality or the like. The pusher 60 is formed of an insulating member such as synthetic resin, for example. In the present 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 portion 21 of the upper housing 20. The pusher 60 has a recess 61, and the igniter 10 is disposed inside the recess 61. In addition, the shape of the pusher 60 is not limited to the above, and can be appropriately changed according to the shape of the upper housing 20, the shape of the lower housing 30, and the like. The recess 61 is the upper portion of the pusher 60 or the portion provided with a recess facing downward. In addition, in Figure 2 the example of, the recess 61 is the portion where the side surface is surrounded by the small-diameter portion 21 in the state where the cutting device 1 does not perform the cutting operation ( Figure 2 the state shown).

[0095] In addition, before the separation portion 51 is separated from the conductor 50, the distance L2 between the front end (for example, the front end portion 31) of the convex portion 30a and the separation portion 51 is smaller than the vertical length L1 of the pusher 60. In addition, in the present embodiment, no other member is disposed between the front end (for example, the front end portion 31) of the convex portion 30a and the separation portion 51. That is, the distance L2 is the length of the space (air layer).

[0096] [1-2. Cutting operation]

[0097] Next, with reference to Figure 3 the cutting operation in the cutting device 1 configured as described above will be described. Figure 3 is a diagram for explaining the cutting operation of the cutting device 1 of the present embodiment. Figure 3 In (a) of, a cross-sectional view showing a state where the pusher 60 contacts (collides) with the front end portion 31 after the separation portion 51 is cut off is shown. Figure 3 In (b) of, a cross-sectional view showing a state where the pusher 60 further moves downward and the convex portion 30a is deformed from the state of (a) of Figure 3 is shown. Figure 3 In (c) of, it is shown that the pusher 60 further moves downward from the state of (b) of Figure 3 and the bottom portion 33 is deformed on the basis of the deformation of the convex portion 30a.

[0098] First, when the igniter 10 operates, the upper surface (pressure receiving surface) of the pusher 60 receives energy from the igniter 10, so that the pusher 60 moves downward from Figure 2The pusher 60 moves downward at high speed from the initial position shown, separates the separation portion 51 from the holding portion 52, and further moves downward at high speed as one with the separated separation portion 51. Thus, the pusher 60 can forcibly and physically cut the conductor 50.

[0099] like Figure 3 As shown in (a), the pusher 60 receives the pressure of the gas generated by the igniter 10 and separates the separation portion 51 from the conductor 50, and after the separation, moves downward together with the separation portion 51 to contact the front end portion 31 across the separation portion 51. In the present embodiment, the pusher 60 and the separation portion 51 are in surface contact, and the separation portion 51 and the front end portion 31 are in surface contact. Thus, when the pusher 60 contacts the front end portion 31 across the separation portion 51, it is possible to suppress the stress from being locally applied to the pusher 60, thereby suppressing the pusher 60 from being damaged. In addition, in the present embodiment, an example in which the front end portion 31 is a flat surface is described, but even if it is a curved surface (such as the one described later), Figure 7 The same effect can be achieved by using shapes such as (a) etc.

[0100] In addition, since the distance L2 is smaller than the length L1, Figure 3 In (a), the upper surface (surface on the positive side of the Z axis) of the pusher 60 is located above the holding portion 52. As a result, after the cutting action, the distance on the electrical path between the pair of holding portions 52 can be lengthened, thereby suppressing the generation of arcs. In this way, the pusher 60 has the function of cutting off the arc after cutting.

[0101] Then, if Figure 3 As shown in (b), by Figure 3 From the state (a), the pusher 60 is further moved downward, so that the convex portion 30a is deformed. The convex portion 30a is pressed by the pusher 60 and deformed downward. Thus, the impact (stress) from the pusher 60 can be absorbed by the deformation of the convex portion 30a. In addition, even if the pusher 60 is further moved 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. Thus, since the insulation distance between the cut surfaces 53 of the conductor 50 can be lengthened, the occurrence of an arc when the conductor 50 is cut can be suppressed.

[0102] In this specification, pressing (or pushing) means that stress is applied to the protrusion 30a from the pusher 60. Pressing (or pushing) may mean that the pusher 60 directly applies stress to the protrusion 30a, or that the pusher 60 indirectly applies stress to the protrusion 30a via other components.

[0103] Then, if Figure 3 As shown in (c), by Figure 3From the state of (b), the pusher 60 further moves downward, so that further, the bottom 33 deforms downward and the pusher 60 stops. Also 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. Thus, since the insulation distance between the cut surfaces 53 of the conductor 50 can be increased, it is possible to suppress the generation of an arc when cutting the conductor 50.

[0104] In addition, since the bottom 33 is connected to the convex portion 30a, it deforms when the convex portion 30a is pressed by the pusher 60 by a predetermined degree or more. Thus, the lower housing 30 of the present embodiment has a structure in which the bottom 33 deforms when the convex portion 30a is pressed by the pusher. For example, the bottom 33 is configured to move downward or the like. 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 material of the bottom 33 is a material harder than the material of the convex portion 30a. By deforming the bottom 33 together with the deformation of the convex portion 30a, the impact (stress) from the pusher 60 can be absorbed by the convex portion 30a and the bottom 33, respectively.

[0105] Thus, by providing the convex portion 30a in the cutting device 1, it is possible to suppress a situation where the bottom of the cutting device 1 is greatly deformed. For example, in the case where the cutting device does not have the convex portion 30a and the bottom is flat, it can be assumed that the bottom is greatly deformed because the stress from the pusher 60 cannot be absorbed compared to the case where the convex portion 30a is provided. In addition, in such a structure, when the bottom is made of a harder material in order to suppress the deformation of the bottom, there is also a concern that the pusher may be damaged due to the stress (impact) received from the bottom.

[0106] On the other hand, since the cutting device 1 of the present embodiment can absorb the stress from the pusher 60 by using the convex portion 30a, it is possible to suppress the deformation of the bottom 33 compared to the case where the bottom is flat. Thus, the cutting device 1 can suppress a situation where the housing is greatly deformed due to operation and damages other devices or the like. In addition, since the convex portion 30a deforms due to the stress (impact) received from the pusher 60 to relieve the impact on the bottom 33, it is possible to suppress the breakage of the bottom 33. In addition, the impact received by the pusher 60 from the bottom 33 can also be relieved, and the breakage of the pusher 60 can be suppressed.

[0107] In addition, since the convex portion 30a is configured as a part of the lower housing 30, it is possible to suppress the deformation of the bottom 33 without newly adding a member for absorbing the stress from the pusher 60. Thus, it is possible to realize a cutting device 1 that can suppress the deformation of the housing while suppressing an increase in cost and an increase in the number of components.

[0108] As described above, the cutting device 1 may also be configured such that when the convex portion 30a is pressed by the pusher 60, the bottom portion 33 is deformed. In addition, the cutting device 1 may also be configured such that the protruding direction of the convex portion pressed by the pusher 60 is reversed (for example, refer to Figure 14 etc.). In addition, the deformation of the bottom portion 33 is not necessary, and the convex portion 30a may be configured such that the pusher 60 stops on the premise that the bottom portion 33 does not deform. Alternatively, when the convex portion 30a is pressed by the pusher 60, the side wall portion 34 may be further deformed.

[0109] [1-3. Manufacturing method]

[0110] Next, with reference to Figure 4 the manufacturing method of the cutting device 1 configured as described above will be described. Figure 4 is a flowchart showing the manufacturing process of the cutting device 1 of the present embodiment.

[0111] As Figure 4 shown, the upper housing 20 is manufactured by molding or the like (S10), and the lower housing 30 is manufactured by molding or the like (S20). In addition, step S10 may be performed after step S20.

[0112] The convex portion 30a is formed simultaneously when the lower housing 30 is molded. For example, when the convex portion 30a has a shape that tapers toward the top, the number of portions formed at right angles in the convex portion 30a can be reduced, so that the manufacturing of the lower housing 30 becomes easy. In addition, when the connecting portion between the convex portion 30a and the bottom portion 33 is not formed at a right angle, the manufacturing of the lower housing 30 also becomes easy.

[0113] Next, the upper housing 20 and the lower housing 30 are fixed (S30). For example, in a state where the igniter 10, the resin member 40, the conductor 50, and the pusher 60 are accommodated inside, the upper housing 20 and the lower housing 30 are fixed without clearance using a fastening member or the like. Thus, the above-described cutting device 1 is manufactured.

[0114] (Embodiment 2)

[0115] Hereinafter, with reference to Figure 5 and Figure 6 the structure of the cutting device of the present embodiment will be described. In addition, hereinafter, the description will focus on the differences from Embodiment 1, and the description of the same or similar content as in Embodiment 1 will be omitted or simplified.

[0116] Figure 5 is a perspective view showing the cutting device 1a of the present embodiment. Figure 6It is a cross-sectional view showing the cutting device 1a of the present embodiment. The cutting device 1a of the present embodiment is different from the cutting device 1 of Embodiment 1 in that the convex portion is provided independently of the housing.

[0117] As Figure 5 and Figure 6 shown, the cutting device 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 (e.g., joined) to the lower housing 130.

[0118] The lower housing 130 is a member having a bottomed cylindrical shape with a hollow inside. The lower housing 130 has a flat bottom 131. For example, when looking at the cutting device 1a from below, no recess is formed, but it is flat.

[0119] The convex member 170 is configured to be located below the separation portion 51 and protrude upward from the inner surface of the lower housing 130. In the present embodiment, the convex member 170 has a shape that tapers at the top as it goes upward, but the shape is not limited to this. The convex member 170 has a front end portion 171, a wall portion 172, and a flange portion 173. The convex portion 170a is formed by the front end portion 171 and the wall portion 172.

[0120] The front end portion 171 is a flat portion located above in the convex portion 170a. The front end portion 171 is the portion that contacts the separation portion 51 during the cutting operation.

[0121] The wall portion 172 connects the front end portion 171 and the flange portion 173. The wall portion 172 is a conical shape (bottomless conical cylindrical shape) that tapers at the top as it goes toward the front end portion 171. The wall portion 172 is arranged coaxially with the small diameter portion 21 and the large diameter portion 23.

[0122] The flange portion 173 is a portion for fixing the convex portion 170a to the lower housing 130, and is a flat plate shape that protrudes laterally from the lower end of the wall portion 172. The flange portion 173 and the lower housing 130 (e.g., the bottom 131) are joined by welding or the like. Thus, the convex portion 170a is fixed to the lower housing 130.

[0123] In such a cutting device 1a, since the downward stress from the pusher 60 can be absorbed by the convex portion 170a, the deformation of the lower housing 130 can be suppressed.

[0124] In this way, the cutting device 1a may also have a structure in which the lower housing 130 and the convex portion 170a are separately manufactured and joined into one body by welding, fastening members, or the like. In addition, the fixing method of the lower housing 130 and the convex portion 170a is not limited to welding and fastening members, and may be any other method.

[0125] (Various modification examples of each embodiment)

[0126] Hereinafter, with reference to Figures 7 to 12 various modification examples that can be applied to each embodiment or to a certain one of the embodiments will be described.

[0127] Figure 7 FIG. is a cross-sectional view showing a first example of various modification examples of the lower housing 230 of each embodiment. In Figure 7 the various modification examples of the structure of the convex portion will be described. Figure 7 (a) of Figure 7 and (b) of Figure 7 are modification examples of the lower housing 30 of Embodiment 1, Figure 7 and (c) to (d) of

[0128] Figure 7 are modification examples of the lower housing 130 of Embodiment 2. As shown in (a) of

[0129] Figure 7

[0130]

[0131] In addition, the convex portion may have a solid structure with its interior filled.

[0131] As shown in (c) of Figure 7

[0132] Figure 7

[0133]

[0134] Figure 7 In addition, the convex portion may have a hollow structure with a cavity inside, or an arc extinguishing agent, a cooling gas, etc. may be enclosed in the cavity.

[0134] As shown in (e) of Figure 7

[0135] Figure 7 ​​As shown in Fig. (f), the cross-sectional shape of the convex portion 230f may also be a hollow trapezoidal shape without a flange portion. In this case, similar to Embodiment 2, the convex portion 230f is fixed to the lower housing 230.

[0136] As Figure 7 shown in Fig. (g), the cross-sectional shape of the convex portion 230g may also be a hollow semi-circular shape. In this case, similar to Embodiment 2, the convex portion 230g is fixed to the lower housing 230.

[0137] As Figure 7 shown in Fig. (h), the cross-sectional shape of the convex portion 230h may also be a hollow triangular shape. In this case, similar to Embodiment 2, the convex portion 230h is fixed to the lower housing 230.

[0138] Next, with reference to Figure 8 various modifications of the portion connecting the convex portion and the side wall portion will be described. Figure 8 Fig. is a cross-sectional view showing a second example of various modifications of the lower housing of each embodiment. Figure 8 Figs. (a) to Figure 8 (c) of Fig. are modifications of the lower housing 30 of Embodiment 1.

[0139] As Figure 8 shown in Fig. (a), the lower housing 330 has a front end portion 331, a wall portion 332, a bottom portion 333, and a side wall portion 334. The convex portion 330a is formed by the front end portion 331 and the wall portion 332. In addition, the shape of the convex portion 330a is not limited to the shape described below. For example, it may also be Figure 2 , Figure 7 the shape shown in Fig. (a) or Figure 7 Fig. (b).

[0140] The front end portion 331 is a flat plate-like portion in the convex portion 330a.

[0141] The wall portion 332 is a portion that connects the front end portion 331 and the bottom portion 333 and is arranged parallel to the side wall portion 334. In addition, the lower housing 330 may have a wall portion 32 instead of the wall portion 332.

[0142] The bottom 333 connects the wall portion 332 and the side wall portion 334. The bottom 333 may also have an inclined surface 333a where at least a part of the outer surface slopes upward as it goes from the convex portion 330a toward the side wall portion 334. For example, at least this part of the bottom 333 is configured such that the wall thickness becomes thinner as it goes toward the side wall portion 334. The inclined surface 333a may also be formed over the entire surface of the outer surface of the bottom 333. By having an upwardly inclined portion in the bottom 333, deformation of the outer shape of the housing can be suppressed according to the convex portion 330a. The suppression of deformation here means that even if the inclined surface 333a deforms, the inclined surface 333a is suppressed from deforming to a position lower than the bottom 333 or lateral to the side wall portion 334.

[0143] As Figure 8 shown in (b) of

[0144] As Figure 8 shown in (c) of

[0145] The lower housing 330 has a front end portion 331, a wall portion 332, a connecting portion 336, an inclined portion 337, and a side wall portion 334. The bottom is formed by the connecting portion 336 and the inclined portion 337. Since the inner surface and the outer surface of the inclined portion 337 are inclined, the convex portion 330a can disperse the pressure inside the lower housing 330 and can suppress deformation of the outer shape of the housing.

[0146] The connecting portion 336 connects the convex portion 330a and the inclined portion 337.

[0147] Next, with reference to Figure 9 various modified examples in which at least a part of the convex portion has a double-layer structure will be described. Figure 9 is a cross-sectional view showing a third example of various modified examples of the lower housing of each embodiment. As Figure 9 shown in (a) to Figure 9As shown in (f), the cutting device may also include additional housings (additional housings 420a to 420f), which are provided independently of the lower housings (lower housings 410a, 410b, 410d) and are located below the lower housings.

[0148] The additional housings 420a to 420f are each formed of, for example, the same members (such as SUS) as the lower housings, but are not limited thereto. In addition, the additional housings 420a to 420f each constitute a partial outer contour of the housing. The additional housings 420a to 420f are each at least partially exposed. The additional housings 420a to 420f are each an example of the second holding member.

[0149] In addition, the position below the lower housing may refer to a case where it is at least partially located below the lower housing, or may refer to a case where it is located below the convex portion of the lower housing.

[0150] As Figure 9 shown in (a), the lower housing 410a may have a convex portion 430a, and the cutting device includes an additional housing 420a. The additional housing 420a has a shape along the convex portion 430a and the bottom portion 433a. Specifically, the additional housing 420a is in contact (surface contact) with the outer surface of the convex portion 430a and the outer surface of the bottom portion 433a. That is, the additional housing 420a has a convex portion 420a1 (an example of the second convex portion) protruding upward and a bottom portion 420a2 (an example of the second bottom portion). In addition, the convex portion 420a1 has a second wall portion extending upward from the bottom portion 420a2, and the second wall portion is arranged along the wall portion (the first wall portion) of the convex portion 430a. In this case, similarly to Embodiment 2, the convex portion 420a1 is fixed to the lower housing 410a. In addition, when the convex portion 420a1 and the lower housing 410a are separate bodies, it is preferable that the convex portion 420a1 and the lower housing 410a are joined by welding or the like.

[0151] Such a cutting device can effectively suppress the deformation of the lower housing 410a because it can make the thickness of the convex portion and the bottom portion thicker than the thickness of the side wall portion.

[0152] As Figure 9 shown in (b), the additional housing 420b has a side wall portion 420b2 and a hollow convex portion 420b1. The side wall portion 420b2 constitutes the outer contour of the cutting device. That is, the lower housing 410b is housed inside the additional housing 420b. The lower housing 410b has a convex portion 430a. A part of the lower housing 410b is arranged along the side wall portion 420b2 so as to be in contact with the side wall portion 420b2.

[0153] In addition, the lower housing 410b and the additional housing 420b may also be made of metal respectively. Further, in the case where the convex portion 420b1 and the lower housing 410b are separate bodies, preferably, the convex portion 420b1 (or the additional housing 420b) and the lower housing 410b are joined by welding or the like.

[0154] As Figure 9 shown in (c) of [], the additional housing 420c may also have a convex portion 420c1 that forms a concave portion when viewed from below.

[0155] In addition, the lower housing 410b and the additional housing 420c may also be made of metal respectively. Further, in the case where the convex portion 420c1 and the lower housing 410b are separate bodies, preferably, the convex portion 420c1 (or the additional housing 420c) and the lower housing 410b are joined by welding or the like.

[0156] As Figure 9 shown in (d) of [], the lower housing 410d may also be a structure in which a portion provided along the side wall portion 420b2 is omitted from the lower housing 410b shown in (b) of []. Figure 9 In addition, the lower housing 410d and the additional housing 420b may also be made of metal respectively. Further, in the case where the convex portion 420b1 and the lower housing 410d are separate bodies, preferably, the convex portion 420b1 (or the additional housing 420b) and the lower housing 410d are joined by welding or the like.

[0157] In addition, the lower housing 410d and the additional housing 420b may also be made of metal respectively. Further, in the case where the convex portion 420b1 and the lower housing 410d are separate bodies, preferably, the convex portion 420b1 (or the additional housing 420b) and the lower housing 410d are joined by welding or the like.

[0158] As Figure 9 shown in (a) to Figure 9 shown in (d) of [], the additional housing may also be provided along the lower housing. For example, the first convex portion and the second convex portion may also be arranged overlappingly.

[0159] Further, as Figure 9 shown in (e) of [], the additional housing 420e may also 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 is, for example, mountain-shaped, but is not limited thereto. The convex portion 420e1 is located below the convex portion 430a and does not contact the convex portion 430a. The convex portion 420e1 contacts the convex portion 430a by the convex portion 430a being deformed downward.

[0160] In addition, the lower housing 410a and the additional housing 420e may also be made of metal respectively. Further, in the case where the convex portion 420e1 and the lower housing 410a are separate bodies, preferably, the convex portion 420e1 (or the additional housing 420e) and the lower housing 410a are joined by welding or the like.

[0161] As Figure 9As shown in (f), the additional housing 420f can also be configured to cover the opening formed by the convex portion 430a. For example, the additional housing 420f can also be a plate-like member.

[0162] In addition, the lower housing 410a and the additional housing 420f can also be made of metal respectively. Further, in the case where the additional housing 420f and the lower housing 410a are separate bodies, preferably, the additional housing 420f and the lower housing 410a are joined by welding or the like.

[0163] By being configured in this way, for example, stress (impact) that cannot be received (fully absorbed) by the lower housing can be received (absorbed) by the additional housing. For example, the convex portion (second convex portion) of the additional housing can receive stress that cannot be received by the convex portion (first convex portion) of the lower housing. Since at least a part of the stress of the pusher 60 can be absorbed in the lower housing, deformation of the additional housing can be suppressed. Therefore, it is possible to effectively suppress a situation where the cutting device is deformed, such as the outer shape of the cutting device bulging. Figure 9

[0164] Next, various structures of the cutting device will be further described with reference to Figures 10 to 14 Figure 10 FIG. is a cross-sectional view showing a first example of a modification of the cutting device according to each embodiment. In addition, in Figure 10 Figures 10 to 12

[0165] Figure 10

[0166] As shown in (a) of Figure 10 when the separation portion 51 is pressed by the pusher 60 and contacts the convex portion 30a after cutting, the length L3 between the upper surface of the conductor 50 and the upper end surface of the pusher 60 is greater than zero. In addition, the upper surface of the conductor 50 is located above the cut surface 53 of the holding portion 52. The pusher 60 can also be configured such that after the pusher 60 separates the separation portion 51, the upper end of the pusher 60 is located above the cut surface 53 of the holding portion 52 and the separation portion 51. For example, the pusher 60 can have a length L1 such that the upper end is located above the cut surface 53 at the moment when the separation portion 51 contacts the convex portion 30a.

[0166] In addition, the pusher 60 can also be configured such that after the pusher 60 separates the separation portion 51, presses the convex portion 30a downward, and stops, 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 equal to 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.

[0167] Next, with reference to Figure 11 a modified example of the resin member included in the cutting device will be described. Figure 11 It is a cross-sectional view showing a second example of the modified example of the cutting device according to each embodiment.

[0168] As Figure 11 shown, the resin member 80 has a first cylindrical portion 81 and a second cylindrical portion 82. At least a part of the pusher 60 in the initial position is disposed inside the first cylindrical portion 81, and the second cylindrical portion 82 is located below the first cylindrical portion 81. The first cylindrical portion 81 and the second cylindrical portion 82 are coaxially arranged, and the inner diameter of the second cylindrical portion 82 is larger than the inner diameter of the first cylindrical portion 81.

[0169] The first cylindrical portion 81 has an inner surface 81a. The inner surface 81a is arranged to face the side surface of the pusher 60 in a sectional view. In a sectional view, a pair of inner surfaces 81a face each other.

[0170] The second cylindrical portion 82 has an inner surface 82a. The inner surface 82a is inclined so that the inner diameter becomes larger as it goes downward. In a sectional view, a pair of inner surfaces 82a have a conical shape in which the inner diameter becomes smaller as it goes upward.

[0171] For example, the resin member 80 may be configured such that after the pusher 60 presses the convex portion 30a downward and stops, 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.

[0172] Next, with reference to Figure 12 a modified example of the convex portion will be described. Figure 12 It is a cross-sectional view showing a third example of the modified example of the cutting device according to each embodiment.

[0173] As Figure 12 shown, the cutting device includes a hollow member 90. The hollow member 90 is located below the separation portion 51 inside the housing, has a hollow portion 90a with a cavity inside, and the separation portion 51 is located below the pusher 60. The hollow member 90 is placed, for example, on the inner surface of the bottom 131. In addition, the hollow member 90 is not limited to contacting the bottom 131. For example, it may be fixed between the separation portion 51 and the bottom 131.

[0174] Alternatively, the hollow portion 90a may be sealed, and an arc extinguishing agent such as a non-combustible gas or liquid for eliminating an arc may be enclosed in the hollow portion 90a. In this case, the hollow member 90 is configured such that the hollow portion 90a and the space 70 communicate due to the stress from the pusher 60. For example, the hollow member 90 has a strength such that the hollow portion 90a and the space 70 communicate due to the stress from the pusher 60.

[0175] Such a cutting device can be easily manufactured by simply disposing the hollow member 90 within the housing.

[0176] Next, with reference to Figure 13 and Figure 14 a modified example of the convex portion will be described. First, with reference to Figure 13 the structure of the cutting device 1b of the fourth example will be described. Figure 13 FIG. is a cross-sectional view showing a fourth modified example of the cutting device 1b of each embodiment.

[0177] As Figure 13 shown, the cutting device 1b includes a lower housing 530 in place of the lower housing 30 of the cutting device 1 of the first embodiment.

[0178] The lower housing 530 has a convex portion 530a that protrudes upward. Specifically, the lower housing 530 has a convex portion 530a, a bottom portion 533, and a side wall portion 34. The convex portion 530a, the bottom portion 533, and the side wall portion 34 are integrally formed. The lower housing 530 is an example of a first holding member.

[0179] The convex portion 530a is configured to be located below the separation portion 51 and protrude upward. The convex portion 530a is connected to one end of the bottom portion 533 and protrudes upward (the positive Z-axis side) from the bottom portion 533. In addition, the convex portion 530a has a flat plate-like portion above.

[0180] The convex portion 530a is configured to be pushed downward by the pusher 60 that is moved downward by the gas generated by the igniter 10 and deformed downward. The convex portion 530a has a function of absorbing the impact (stress) from the pusher 60 by deformation.

[0181] The bottom portion 533 connects the convex portion 530a and the side wall portion 34. In other words, the convex portion 530a and the side wall portion 34 are connected via the bottom portion 533. The bottom portion 533 is provided to extend along the Y-axis direction. The bottom portion 533 is an example of a first bottom portion.

[0182] In such a lower housing 530, when the convex portion 530a is pushed downward by the pusher 60, it deforms in a manner that flips in the protruding direction (refer to (b) of Figure 14 described later). The material and shape of the convex portion 530a are not particularly limited as long as they are materials and shapes that can flip in the protruding direction. For example, examples of the material of the convex portion 530a include metals such as stainless steel (SUS) and aluminum.

[0183] In addition, before separating the separation portion 51 from the conductor 50, the distance L6 between the front end (the end on the positive Z-axis side) of the convex portion 530a and the separation portion 51 is smaller than the vertical length L1 of the pusher 60.

[0184] With reference to Figure 14Describe the cutting operation of the cutting device 1b configured as described above. Figure 14 It is a diagram for describing the cutting operation of the cutting device 1b which is the fourth example of the modification.

[0185] Figure 14 The cross-sectional view of the cutting device 1b in (a) is the state where the cutting device 1b does not perform the cutting operation (the initial position of the pusher 60). Figure 14 The structure of (a) is the same as Figure 13 the same.

[0186] Figure 14 The cross-sectional view in (b) shows the state where, starting from the state where the pusher 60 contacts (collides) with the convex portion 530a, the pusher 60 further moves downward, and the convex portion 530a deforms downward. The convex portion 530a deforms in a manner of flipping in the protruding direction when being pushed downward by the pusher 60. In addition, when being pushed downward by the pusher 60, along with the deformation of the convex portion 530a, the bottom portion 533 also deforms downward.

[0187] In such a lower housing 530, since the shape of the downward deformation can be adjusted by using the shape, length, etc. of the convex portion 530a and the shape, length, etc. of the bottom portion 533, it is possible to suppress the downward deformation to an unexpected degree when being pushed downward by the pusher 60. In addition, when the protruding direction of the convex portion 530a flips, the kinetic energy of the pusher 60 is consumed, so that the pusher 60 can be rapidly decelerated. That is to say, the lower housing 530 can effectively absorb the stress from the pusher 60 by the flipping of the protruding direction of the convex portion 530a.

[0188] (Other embodiments)

[0189] As described above, the cutting device of one or more modes has been described based on each embodiment, but the present disclosure is not limited to these embodiments. As long as it does not deviate from the gist of the present disclosure, the modes obtained by applying various deformations conceived by those skilled in the art to this embodiment and the modes constructed by combining the constituent elements in different embodiments can also be included in the present disclosure.

[0190] For example, in the above embodiment, an example where the housing is made of metal has been described, but it is not limited thereto. For example, at least one of the lower housing and the additional housing in the housing may also be made of a resin having deformation characteristics.

[0191] In addition, in the above embodiment, an example where one convex portion is provided has been described, but a plurality of convex portions may also be provided.

[0192] In addition, the order of each process in the manufacturing method of the cutting device described in the above embodiment can also be switched. Further, each process in the manufacturing method of the cutting device described in the above embodiment can be implemented by one process or by different processes. In addition, implementing by one process is intended to include cases where each process is implemented using one device, each process is continuously implemented, or each process is implemented at the same location. Further, different processes are intended to include cases where each process is implemented using different devices, each process is implemented at different times (for example, different dates), or each process is implemented at different locations.

[0193] Industrial applicability

[0194] The present disclosure is useful for a cutting device disposed in a circuit and the like.

[0195] Explanation of reference numerals

[0196] 1, 1a, 1b, cutting device; 10, igniter; 20, upper housing; 21, small-diameter portion; 22, connecting portion; 23, large-diameter portion; 30, 130, 230, 330, 410a, 410b, 410d, 530, lower housing (first holding member); 30a, 170a, 230a, 230b, 230c, 230d, 230e, 230f, 230g, 230h, 330a, 430a, 530a, convex portion (first convex portion); 31, 171, 331, front end portion; 32, 172, 332, wall portion; 33, 131, 333, 335, 433a, 533, bottom portion (first bottom portion); 34, 334, 420b2, side wall portion; 40, 80, resin member; 41, buried portion; 42, 81, first cylindrical portion; 43, 82, second cylindrical portion; 50, conductor; 51, separating portion; 52, holding portion; 53, cutting surface; 60, pusher; 61, concave portion; 70, space; 81a, 82a, inner surface; 90, hollow member; 90a, hollow portion; 170, convex member; 173, flange portion; 333a, 335a, inclined surface; 336, connecting portion; 337, inclined portion; 420a, 420b, 420c, 420e, 420f, additional housing (second holding member); 420a1, 420b1, 420c1, 420e1, convex portion (second convex portion); 420a2, bottom portion (second bottom portion); L1, L3, length; L2, L4, L5, L6, distance.

Claims

1. A cutting device, wherein, The cutting device includes: a housing having a first convex portion; an igniter capable of generating gas; a pusher located below the igniter; and a conductor having a separation portion located inside the housing and below the pusher, and being separated by the pusher that bears the pressure of the gas generated by the igniter, the first convex portion of the housing is located below the separation portion and protrudes upward, the first convex portion of the housing is deformed downward by being pressed by the pusher.

2. The cutting device according to claim 1, wherein, The top of the first convex portion of the housing tapers as it goes upward.

3. The cutting device according to claim 1 or 2, wherein, Before separating the separation portion from the conductor, the distance between the front end portion of the first convex portion of the housing and the separation portion is smaller than the vertical length of the pusher.

4. The cutting device according to any one of claims 1 to 3, wherein, The housing has a first holding member, the first holding member has: a first bottom; and the first convex portion protruding upward from the first bottom, when the first convex portion is pressed by the pusher, the first bottom of the first holding member is deformed.

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

6. The cutting device according to claim 4, wherein, The first convex portion has a first wall portion extending upward from the first bottom, the first holding member has a concave portion when viewed from below, the first wall portion of the first convex portion forms the inner surface of the concave portion.

7. The cutting device according to claim 6, wherein, The first holding member further has a side wall portion, the side wall portion and the first convex portion are connected via the first bottom, when the first convex portion of the housing is pressed by the pusher, the side wall portion of the first holding member is deformed.

8. The cutting device according to claim 6, wherein, The first holding member further has a side wall portion, the side wall portion and the first convex portion are connected via the first bottom, at least a part of the outer surface of the first bottom slopes upward as it goes from the first convex portion toward the side wall portion.

9. The cutting device according to claim 6, wherein, The first holding member further has a side wall portion, the side wall portion and the first convex portion are connected via the first bottom, at least a part of the inner surface of the first bottom slopes upward as it goes from the first convex portion toward the side wall portion.

10. The cutting device according to claim 6, wherein, The first holding member further has a side wall portion, the side wall portion and the first convex portion are connected via the first bottom, the first bottom has: a connecting portion connected to the first convex portion; and an inclined portion connecting the connecting portion and the side wall portion, and the outer surface and the inner surface slope upward respectively as they go from the connecting portion toward the side wall portion.

11. The cutting device according to any one of claims 5 to 10, wherein, The housing further has a second holding member, the second holding member is located below the first holding member, the first holding member and the first convex portion are integrally formed.

12. The cutting device according to claim 11, wherein, The second holding member has a second convex portion protruding upward, the second convex portion is located below the first convex portion of the first holding member.

13. The cutting device according to claim 12, wherein, The second holding member has: a second bottom; and the second convex portion protruding upward from the second bottom, the second convex portion has a second wall portion extending upward from the second bottom, the second wall portion is arranged to follow the first wall portion.

14. The cutting device according to any one of claims 1 to 13, wherein, The conductor further has a holding portion adjacent to the separation portion, After the separating member separates the separation part, the upper end of the pushing member is located at a position above the cutting surface between the holding part and the separation part.

15. The cutting device according to claim 14, wherein, When the pushing member presses the first convex part downward and the pushing member is stationary, the distance between the lower end of the pushing member and the lower end of the cutting surface of the holding part is equal to or greater than the distance between the upper end of the pushing member and the upper end of the cutting surface of the holding part.

16. The cutting device according to any one of claims 1 to 15, wherein, The cutting device further includes a resin member covering the conductor. The resin member has: a burying part in which the conductor is buried; a first cylindrical part in which the pushing member is disposed inside; and a second cylindrical part located below the first cylindrical part, the inner diameter of the first cylindrical part being smaller than the inner diameter of the second cylindrical part, when the pushing member presses the first convex part downward and the pushing member is stationary, the upper end of the pushing member is adjacent to the first cylindrical part, and the lower end of the pushing member is adjacent to the second cylindrical part.

17. A cutting device, wherein, The cutting device includes: a housing; an igniter capable of generating gas; a conductor having a separation part located inside the housing; a pushing member located below the igniter, which separates the separation part from the conductor by receiving the pressure of the gas generated by the igniter; and a hollow member located inside the housing and below the separation part, with a hollow interior, the separation part being located below the pushing member, when the hollow member is pressed by the pushing member, the hollow member deforms downward.

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