ELECTRICAL CIRCUIT BREAKER DEVICE

Abstract

An electrical circuit breaker device (1) comprising: in a housing (10) made of a synthetic resin, a detonator (20), a rod-shaped projectile (40) made of a synthetic resin, a conductor section (50) to form part of an electrical circuit, positioned in this order from a first end section (11) of the housing (10) to a second end section (12) opposite the first end section (11) in a housing axial direction, and an insulating sealing space (60) between the second end section (12) of the housing (10) and the conductor section (50), wherein the conductor section (50) is a plate section comprising: a first connecting section (51) and a second connecting section (52) at both end sides; and a cutting section (53) at an intermediate section, the conductor section (50) is positioned with a surface of the cutting section (53) orthogonal to the housing axial direction in a housing width direction, and The rod-like projectile (40) is positioned to face the surface of the cutting section (53) of the conductor section (50) in the housing axial direction. characterized by the fact that The cutting section (53) includes: a 1a fracture section (55a) and a 1b fracture section (55b) formed at two locations on the second end section side, at an interval in the case width direction, each of the fracture sections (55a, 55b) is a groove section that is square or right-angled in a planar form, surrounded by three sides, and a width (W1) of the 1a fraction section (55a) and a width (W1) of the 1b fraction section (55b), the dimensions being in the housing width direction, which are the same to each other, and the width (W1) is 5 mm or less in length, wherein The corners (64) of the insulation closure space (60) are facing both the 1a fracture section (55a) and the 1b fracture section (55b) of the cutting section (53) in the housing axial direction, the corners (64) of the insulation closure space (60) are arranged outside of positions in the housing width direction that coincide with a central axis of the 1a fracture section (55a) of the cutting section (53) in the housing axial direction or coincide with the central axis of the 1b fracture section (55b) in the housing axial direction.

Description

[0001] The present invention relates to an electrical circuit breaker device according to the preamble of independent claim 1 and to an electrical circuit breaker device according to the preamble of independent claim 3. Such an electrical circuit breaker device is known, for example, from EP 3 214 633 A1 and can be used in electrical circuits of vehicles, household appliances, and the like. Furthermore, DE 198 17 133 A1 discloses a device for the defined and rapid disconnection of high-voltage electrical circuits with a conductor in which the conductor cross-section is weakened by more or less deep incisions in the conductor, such as can be produced on an industrial scale, in particular by laser or ultrasonic welding.

[0002] With regard to anomalies and the like in the electrical circuits of vehicles and household appliances, or in a system containing such circuits, electrical circuit breakers have been used to interrupt the circuits and prevent major damage. The importance of electrical circuit breakers is particularly high in the electrical circuits of electric vehicles. The electrical circuit breaker devices are known to contain a detonator, a projectile (piston), a conductor, and the like in a housing (US 2005 / 0083164A1, US 2005 / 0083165A1, US 2012 / 0234162A1, JP H11-232979A, JP 2014-49300A, JP 2016-85947A, JP 2014-49300A).

[0003] US 2005 / 0083164A1 and US 2005 / 0083165A1 give an example of a housing material such as metals, ceramics, and polymers, and describe that certain polymers are preferred (in pages 2 to 3 of US 2005 / 0083164A1 and page 2 of US 2005 / 0083165A1).

[0004] In JP H11-232 979 A, ​​a housing 13 is made of stainless steel (paragraph 0011).

[0005] In JP 2014 - 49 300 A, a housing 30 is made of a material that has electrically insulating properties and high strength (for example, a resin material) (paragraph 0034). If a polymeric material (resin material) is used, the housing (box) must be thickened to provide the necessary strength, as is done, for example, by… Fig. One of each of US 2005 / 0083164A1, US 2005 / 0083165A1 and JP 2014-49300A is to be understood. If the stainless steel housing 13 is used, the increase in mass will be greater, and the insulating housing 14 must be arranged in combination, so that the structure and assembly are complicated.

[0006] In JP 2016 - 85 947 A, a metallic cylinder is used to reinforce a resin housing to provide an effect not provided for in US 2005 / 0 083 164 A1, US 2005 / 0 083 165 A1, US 2012 / 0 234 162 A1, JP H11 - 232 979 A and JP 2014 - 49 300 A.

[0007] In JP 2014 - 49 300 A, an arc extinguishing chamber 32 is provided for extinguishing an arc that occurs when a conductor under tension is cut (in claims).

[0008] The object of the present invention is to create an electrical circuit interrupter device which can be reduced in size overall while maintaining a required strength.

[0009] This problem is solved according to the invention by an electrical circuit breaker device with the features of independent claim 1 or by an electrical circuit breaker device with the features of independent claim 3. Preferred embodiments are set out in the dependent claims.

[0010] The present invention (first embodiment) provides an electrical circuit interrupter device comprising, in a housing made of a synthetic resin, a detonator, a rod-shaped projectile made of a synthetic resin, a conductor section to form part of an electrical circuit, positioned in this order from a first end section of the housing to a second end section opposite the first end section in a housing axial direction, and an insulating sealing space between the second end section of the housing and the conductor section, wherein the conductor section is a plate section comprising: a first connecting section and a second connecting section on both end sides;and a cutting section at an intermediate section, the conductor section being positioned with a face of the cutting section in a case width direction orthogonal to the case axial direction, the rod-like projectile being positioned to face the face of the cutting section of the conductor section in the case axial direction, and the cutting section comprising: a 1a fracture section and a 1b fracture section formed at two locations on the second end section side, at an interval in the case width direction, each of the fracture sections being a groove section being square or right-angled in a planar form, surrounded by three sides.

[0011] The present invention (second embodiment) provides an electrical circuit interrupter device comprising, in a housing made of a synthetic resin, a detonator, a rod-shaped projectile made of a synthetic resin, a conductor section forming part of an electrical circuit, positioned in this order from a first end section of the housing to a second end section opposite the first end section in a housing axial direction, and an insulating sealing space between the second end section of the housing and the conductor section, wherein the conductor section is a plate section comprising: a first connecting section and a second connecting section at both end sides; and a cutting section at an intermediate section.The conductor section is positioned with a surface of the cutting section orthogonal to the case axial direction in a case width direction; the rod-like projectile is positioned to face the surface of the cutting section of the conductor section in the case axial direction; and the cutting section includes: a 2a fracture section and a 2b fracture section formed on a surface of the same on the first end section side, at two locations in an interval in the case width direction; each of the fracture sections is a groove section that is square or right-angled in a planar shape, surrounded by three sides; and a 1a fracture section and a 1b fracture section formed on a surface of the same on the second end section side, at two locations in an interval in the case width direction; each of the fracture sections is a Groove section,which is square or rectangular in a planar form, surrounded by three sides, a central axis of the 2a fraction section in the case axial direction coincides with a central axis of the 1a fraction section in the case axial direction, and a central axis of the 2b fraction section in the case axial direction coincides with a central axis of the 1b fraction section in the case axial direction, and a width (W1) of the 1a fraction section is the same as a width (W1) of the 1b fraction section, a width (W2) of the 2a fraction section is the same as a width (W2) of the 2b fraction section, the widths W1 and W2 are dimensions in the case width direction, and W1 and W2 have the relationship W1 ≥ W2., Description of the drawings

[0012] The present invention is better understood from the detailed description given below and the accompanying drawings, which are given only for illustrative purposes and do not limit the present invention. Fig. Figure 1 is an axial-direction cross-sectional view of an electrical circuit interrupter device according to an embodiment of the present invention. Fig. 2A and Fig. 2B are each a partially enlarged view of Fig. 1. Fig. Figure 3 is an axial-directional cross-sectional view representing a state after activation by the electrical circuit breaker device, as shown in Fig. 1. Fig. Figure 4 shows a cross-sectional view of an embodiment, different from the electrical circuit breaker device shown in Fig. 1. Description of exemplary implementations

[0013] The present invention provides an electrical circuit interrupter device that can be reduced in size overall while maintaining a required strength, and can extinguish an arc that is generated even when a conductor section is cut.

[0014] The electrical circuit interrupter device according to an embodiment of the present invention can be attached to and used in electrical circuits of electric vehicles, batteries of gasoline or diesel vehicles (such as lithium-ion batteries), and various electrical circuits of household electrical appliances and the like, and can interrupt the electrical circuits when anomalies occur in the electrical circuits.

[0015] The electrical circuit interrupter of the present invention can be attached to the various types of vehicles described above on its own, but can also be attached and activated in conjunction with an airbag device mounted, for example, on a vehicle. In such a case, if various types of vehicles on which the airbag device has been mounted are involved in accidents, the flow of large currents can be prevented by the electrical circuit interrupter, which is made according to an embodiment of the present invention, receiving an activation signal from the airbag device and being triggered to interrupt the electrical circuit.

[0016] The casing is made of a synthetic resin and has an external shape appropriately determined according to the mounting surface. The casing has a structure and size capable of accommodating and mounting components such as a detonator, projectile, cylinder, ladder section, reinforcing frame, and the like. The casing may also include a first casing extending from a first end section to a section where the ladder section is located; and a second casing (base clip) extending from a section where the ladder section is located to a second end section.

[0017] Examples of this type of igniter include those used in common electrical circuit breakers, igniters for gas generators used in vehicle airbag systems, and the like. The igniter is equipped with a conductive pin for applying energy to an ignition section containing an ignition charge. Upon activation from an external power source, the igniter draws energy and combusts the ignition charge to produce a combustion product, such as a combustion gas or flames.

[0018] A rod-like projectile, designed to absorb pressure from the combustion product generated by the activation of the igniter, moves axially within the housing and cuts the conductor section to interrupt the electrical circuit. The rod-like projectile may have a uniform outer diameter (uniform width) throughout, or it may have an end section smaller or larger compared to the other sections. The end section of the rod-like projectile is preferably formed in a square prism shape (that is, perpendicular in a planar form) or square in a planar form to facilitate cutting by the rod-like projectile. The rod-like projectile may be made of the same synthetic resin as the housing. A cylinder may be positioned between the rod-like projectile and the housing, if necessary to reinforce the housing.

[0019] The conductor section can be the same as that used in known electrical circuit breakers. The conductor section is a plate-shaped section that includes connecting sections at both ends (a first connecting section and a second connecting section) and a cutting section at an intermediate position. The conductor section forms part of the electrical circuit when attached to it. One form of the conductor section is a plate-shaped section, corresponding to the shape and structure of an attachment section with respect to the housing. The conductor section is positioned between a cylindrical space and an insulating closure space.

[0020] In the electrical circuit breaker device of a first embodiment, the cutting section includes a 1a-break section and a 1b-break section formed on a surface of the same, on the second end section side, at two locations in an interval in a direction orthogonal to a housing axial direction (a housing width direction), each of the break sections being a groove section that is perpendicular in a planar form.

[0021] Each of the 1a fraction section and the 1b fraction section is the groove section, which is square or rectangular in a planar shape, enclosed on three sides, since it is formed by cutting out on three sides, each of the two locations of the plate-like cutout section on the second end section side. Each groove section is a cutout section obtained by cutting out on three sides, so that the cutout section is in a rectangular or square shape, and a cutout section that is cut into a shape that has a slanted side such as a trapezoid or a V-shape cannot be used as the groove section.

[0022] The electrical circuit breaker device according to the first embodiment includes fracture sections, designed as groove sections in a special shape, at two locations on the cutting section of the conductor section. These fracture sections facilitate cutting the conductor section through the projectile during activation. Easier cutting of the conductor section in this manner allows the force required by the detonator to apply pressure to the projectile during activation to be reduced, thus leading to a reduction in the size of the detonator housing.

[0023] In a preferred embodiment of the electrical circuit breaker device according to the first embodiment, the width (W1) of the 1a fracture section and the width (W1) of the 1b fracture section are the same dimensions in the housing width direction, and the width W1 is 5 mm or less in length.

[0024] The width (W1) of the 1a fraction section and the width (W1) of the 1b fraction section is preferably 5 mm or less, and more preferably 2 mm or less, to suppress the generation of heat when a current is applied.

[0025] In another preferred embodiment of the electrical circuit breaker device according to the first embodiment, a thickness (t1) and a thickness (t2), each dimension in the housing axial direction, are: a thickness of a section of the cutting section in which the 1a-fracture section and the 1b-fracture section are not formed; and a thickness of a section of the cutting section in which the 1a-fracture section and the 1b-fracture section are formed. The thickness (t1) and the thickness (t2) satisfy a relationship of t2 / t1 = from 0.2 to 0.7.

[0026] If the relationship t2 / t1 = from 0.2 to 0.7 is satisfied, the heat accumulation can be suppressed by applying a current, which is preferred.

[0027] The insulating sealing chamber is formed between the conductor section and the second end section of the casing, and is located opposite the cylindrical space above the conductor in the casing's axial direction. The insulating sealing chamber has a cross-sectional shape of a square or rectangle in the casing's width direction, corresponding to the shape of the end section of the rod-like projectile. It has an opening section facing the conductor section, a sealed end surface opposite the opening section in the casing's axial direction, and four side surfaces between the opening section and the sealed end surface. The opening section of the insulating sealing chamber faces the 1a fracture section and the 1b fracture section of the cutting section. Four corners are formed between the circumferential edge of the opening section of the insulation closure space and the four side surfaces.The four corners of the insulation closure space are oriented towards both the 1a fracture section and the 1b fracture section, from the cutting section in the housing axial direction.

[0028] An electrical circuit breaker device according to a second embodiment is the same as the electrical circuit breaker device according to the first embodiment, except that the break sections are provided on both sides of the cutting section in the housing axial direction. The cutting section includes a 2a break section and a 2b break section, formed on a surface of the same on the first end section side, at two locations within an interval in the housing width direction. Each of the break sections is the groove section, which is square or rectangular in a planar form, enclosed by the three sides.Each of the 2a fraction section and the 2b fraction section is the groove section, which is square or rectangular, in a planar shape, enclosed by three sides, since it is formed by cutting out, on three sides, each of the two locations of the plate-like cutting section on the first end section side. Each groove section is a cutout section obtained by cutting out on three sides, so that the cutout section is in a rectangular or square shape, and a cutout section that is cut into a shape that has a slanted side such as a trapezoid or a V-shape cannot be used as the groove section.

[0029] The cutting section comprises a 1a-fracture section and a 1b-fracture section, formed on a surface of the same on the second end section side, at two locations, within an interval in the case width direction. Each of the fracture sections is a groove section, square or rectangular, in a planar form, enclosed on three sides. Each of the 1a-fracture section and the 1b-fracture section is a groove section, square or rectangular, in a planar form, enclosed on three sides, as it is formed by cutting out, at three locations, each of the two locations of the plate-like cutting section on the second end section side.Each groove section is a cutout section obtained by cutting out three sides, so that the cutout section is in a rectangular or square shape, and the cutout section that is cut into a shape that has a slanted side such as a trapezoid or a V-shape cannot be used as the groove section.

[0030] A central axis of the 2a fraction segment in the case axial direction coincides with a central axis of the 1a fraction segment in the case axial direction, and a central axis of the 2b fraction segment in the case axial direction coincides with a central axis of the 1b fraction segment in the case axial direction. The width (W1) of the 1a fraction segment is the same as the width (W1) of the 1b fraction segment, a width (W2) of the 2a fraction segment is the same as a width (W2) of the 2b fraction segment, and W1 and W2 have the relationship W1 ≥ W2.

[0031] The corners of the end face of the rod-like projectile preferably face the 2a fracture section and the 2b fracture section. The corners of the insulation-closure chamber preferably face both the 1a fracture section and the 1b fracture section of the cutting section. The width of the end face of the rod-like projectile is slightly smaller than the width of the opening section of the insulation-closure chamber.

[0032] The electrical circuit breaker device according to the second embodiment includes break sections formed as groove sections in a special shape at two locations on both sides of the cutting section of the conductor section in the housing axial direction. This facilitates the cutting section being cut through the projectile during activation. Easier cutting of the conductor section in this manner allows the output from the detonator for applying pressure to the projectile to be reduced during activation, leading to a reduction in size and further reducing the size of the housing that accommodates the detonator.

[0033] In a preferred embodiment of the electrical circuit interrupter device according to the second embodiment, the width (W1) and the width (W2), which are dimensions in the housing width direction, are each 5 mm or less in length and 5 mm or less in length.

[0034] To suppress the accumulation of heat generated by the application of a current, W1 is preferably 5 mm or less and more preferably 2 mm or less, and W2 is preferably 5 mm or less and more preferably 2 mm or less.

[0035] In another preferred embodiment of the electrical circuit breaker device according to the second embodiment, a thickness (t11) and a thickness (t12), which are dimensions in the housing axial direction, are each a thickness of a section of the cutting section on which the 1a-break section, the 1b-break section, the 2a-break section and the 2b-break section are not formed; and a thickness of a section of the cutting section on which the 1a-break section, the 1b-break section, the 2a-break section and the 2b-break section are formed. The thickness (t11) and the thickness (t12) satisfy a relationship of t12 / t11 = from 0.2 to 0.7.

[0036] If the relationship t12 / t11 = from 0.2 to 0.7 is satisfied, the heat accumulation can be suppressed by applying a current, which is preferred.

[0037] If the relationship t12 / t11 = from 0.3 to 0.6 is satisfied, the heat accumulation can be suppressed due to the application of current, which is preferred.

[0038] The electrical circuit breaker device according to one embodiment of the present invention makes it easier to cut the conductor section during activation, which makes it possible to use a smaller detonator with a smaller output. The detonator is used indirectly for cutting. As a result, the housing that accommodates the detonator can be reduced in size, and thus the electrical circuit breaker device can also be reduced in size. Exemplary embodiments of the invention(1) An electrical circuit breaker device, illustrated in Fig. 1 and Fig. 2A and 2B

[0039] An embodiment of an electrical circuit breaker device 1 according to the present invention is described with reference to Fig. 1 and Fig. 2A and Fig. 2B described.

[0040] A housing (resin housing) 10, made of a synthetic resin, has a cylindrical space 13 extending from a first end section 11 to a conductor section 50 at a second end section 12, opposite the first end section 11 in the axial direction. A connector insertion section 15, which is connected to a power source by a conductor cable during use, is attached to the first end section 11. Within the cylindrical space 13 of the housing 10, a detonator 20, a projectile 40, made of a synthetic resin, and a conductor section 50 are positioned, in that order, axially from the first end section 11. The casing 10, the cylindrical space 13, the fuze 20, and the rod-shaped projectile 40 are arranged with their respective central axes aligned with each other.

[0041] The detonator 20 includes a resin section 22 in which a section of a detonator body, which includes a detonator section 21 and a conductor pin 23, is surrounded by a resin, and the detonator section 21 protrudes from the resin section 22.

[0042] The rod-shaped projectile 40, which is in Fig. The one shown in 1 can be the same as the one shown in Fig. 1 and Fig. Figure 2A of JP 2016 - 85 947 A illustrates the rod-like projectile 40, which comprises a rod section 41 and an end-enlarged-diameter section 42 formed at one end of the rod section 41. The outer diameter of the end-enlarged-diameter section 42 is larger than the outer diameter of the rod section 41. The cross-sectional shape of the rod section 41 in the width direction is circular, and the cross-sectional shape of the end-enlarged-diameter section 42 in the casing width direction is square. A recessed section with a reduced outer diameter may be formed in the rod section 41 to accommodate an O-ring made of rubber (for example, silicone rubber) or synthetic resin.A groove, serving as a gas vent and extending continuously in the axial direction, can be formed between the rod section 41 and the end-enlarged-diameter section 42. One, two, or more grooves can be formed.

[0043] A cylinder 30, which is in Fig. The cylinder 30, shown in Figure 1, serves to reinforce the housing 10 and is made of a metal, such as stainless steel or aluminum, and a fiber-reinforced resin, such as a carbon fiber-reinforced resin. The thickness of the cylinder 30 varies depending on the size of the device 1 and is preferably in the range of approximately 0.5 to approximately 3 mm. The cylinder 30 is arranged by surrounding the ignition section 21 of the detonator 20 and the rod section 41 of the projectile 40. The cylinder 30 is pressed into the cylindrical space 13 to be fixed immovably in the axial direction.

[0044] The conductor section 50 is for forming part of an electrical circuit when the device 1 is attached to the electrical circuit. The conductor section 50 is a plate section that includes a first connecting section 51 and a second connecting section 52 at both end faces; and a cutting section 53 at an intermediate section. The first connecting section 51 (a hole 51a of the first connecting section 51) and the second connecting section 52 (a hole 52a of the second connecting section 52) are for connecting to other conductors (for example, line cables) in the electrical circuit, and the cutting section 53 is for cutting to interrupt the electrical circuit during activation.

[0045] The ladder section 50, shown in Fig. 1, is configured to have the cutting section 53, the surface of which is orthogonal to surfaces of the first connecting section 51 and the second connecting section 52, but the surfaces of the cutting section 53 may be flush with the surfaces of the first connecting section 51 and the second connecting section 52. Furthermore, the conductor section 50 may have a section of the first connecting section 51 close to the cutting section 53; and a section of the second connecting section 52 close to the cutting section 53, both of which are deformed in the thickness direction according to the shape and structure of an attachment section of the housing 10.

[0046] The conductor section 50 is positioned with the surface of the cutting section 53 in the width direction of the housing 10. The surface of the cutting section 53 of the conductor section 50 faces an end surface 42a of the end enlarged-diameter section 42 of the rod-like projectile 40. Fig. 1 The surfaces of the cutting section 53 and the end surface 42a are adjacent to each other, but can be facing each other with a distance.

[0047] As in Fig. 1 and Fig. 2A and Fig. As shown in Figure 2B, the cutting section 53 includes a 1a-fracture section 55a and a 1b-fracture section 55b, which are formed on the surface of the same on the second end section 12 side, at two locations within an interval in the case width direction. Each of the 1a-fracture section 55a and the 1b-fracture section 55b is formed by cutting out, on three sides, the surface of the cutting section 53 on the second end section 12 side, and is a groove section that is square or rectangular in a planar shape, enclosed on the three sides after cutting. One width (W1) of the 1a-fracture section 55a is the same as one width (W1) of the 1b-fracture section 55b. W1 represents a length in the case width direction.

[0048] The cutting section 53 includes a 2a-fracture section 54a and a 2b-fracture section 54b, which are formed on its surface, on the first end section 11 side, at two locations within an interval in the case width direction. Each of the 2a-fracture section 54a and the 2b-fracture section 54b is formed by cutting out three sides of the surface of the cutting section 53 on the first end section 11 side and is a groove section that is square or rectangular in a planar shape, enclosed on three sides after cutting. A width (W2) of the 2a-fracture section 54a is the same as a width (W2) of the 2b-fracture section 54b. W2 represents a length in the case width direction. W1 and W2 have a relationship of W1 ≥ W2, and W2 / W1 is preferably from 0.1 to 1.0.

[0049] The width W1 is 5 mm or less in length, and preferably 2 mm or less in length to suppress heat buildup due to the application of a current, and the width W2 is 5 mm or less in length, and preferably 1 mm or less in length to suppress heat buildup due to the application of a current. It should be noted that the length of the cutting section 53, in Fig. 1, a length (L in Fig. 1) from a corner (first corner) to a boundary between the cutting section 53, which extends in the housing width direction, and the first connecting section 51, which extends in the housing axial direction, to a corner (second corner) at the boundary between the cutting section 53, which extends in the housing width direction, and the second connecting section 52, which extends in the housing axial direction.

[0050] A central axis of the 1a fracture section 55a in the case axial direction coincides with a central axis of the 2a fracture section 54a in the case axial direction, and a central axis of the 1b fracture section 55b in the case axial direction coincides with a central axis of the 2b fracture section 54b in the case axial direction.

[0051] A thickness (t11) is the thickness of a section of the cutting section 53 where the 1a fraction section 55a, the 1b fraction section 55b, the 2a fraction section 54a, and the 2b fraction section 54b are not formed, and a thickness (t12) is the thickness of a section of the cutting section 53 where the 1a fraction section 55a and the 2a fraction section 54a are formed, or is the thickness of a section of the cutting section 53 where the 1b fraction section 55b and the 2b fraction section 54b are formed. The thickness (t11) and the thickness (t12) satisfy a relationship of t12 / t11 = from 0.2 to 0.7. The thickness of the cutting section 53 is a dimension in the axial direction of the housing 10. Since the relationship t12 / t11 = 0.2 to 0.7 is satisfied, heat accumulation due to the application of a current can be suppressed. It should be noted that in Fig. 2A and Fig. 2B the 1a fracture section 54a and the 2b fracture section 54b cannot be provided in the embodiment, and in such an embodiment, t11 and t12 correspond to a thickness (t1) of the section on which the 1a fracture section 55b or the 1b fracture section 55b is not formed; and a thickness (t2) of the section on which the 1a fracture section 55a or the 2a fracture section 54a is formed, respectively.

[0052] The conductor section 50 is positioned between the cylindrical chamber 13 and the insulating seal chamber 60, with the surface of the cutting section 53 orthogonal to the axial direction of the housing 10. A central axis of the insulating seal chamber 60 coincides with the central axis of the housing. The width of an opening section 61 of the insulating seal chamber 60 is slightly larger than the width of the cylindrical chamber 13 at the second end section 12 side (a width of the end surface 42a of the rod-like projectile 40). The insulation closure space 60 is a space with a cross-sectional shape of a square, in the housing width direction, and has the opening section 61 facing the conductor section 50, a closed end surface 62 opposite the opening section 61, in the housing axial direction, and four side surfaces 63 between the opening section 61 and the closed end surface 62.The opening section 61 of the insulation-closure chamber 60 faces the 1a-fracture section 55a and the 1b-fracture section 55b of the cutting section 53. Four corners 64 are formed between the circumferential edge of the opening section 61 of the insulation-closure chamber 60 and the four side surfaces 63.

[0053] The corners 64 of the insulation closure space 60 are arranged outside of positions in the housing width direction that coincide with the central axis of the 1a fracture section 55a of the cutting section 53 in the housing axial direction (the central axis of the 2a fracture section 54a in the housing axial direction); or the central axis of the 1b fracture section 55b in the housing axial direction (the central axis of the 2b fracture section 54b in the housing axial direction).The corners of the end surface 42a of the rod-like projectile 40 are preferably arranged outside of positions in the housing width direction that coincide with the central axis of the 2a fracture section 54a of the cutting section 53 in the housing axial direction (the central axis of the 1a fracture section 55a in the housing axial direction); or the central axis of the 2b fracture section 54b in the housing axial direction (the central axis of the 1b fracture section 55b in the housing axial direction).

[0054] Examples of a manufacturing process applicable to the electrical circuit breaker device, illustrated in Fig. 1, comprising: a manufacturing process in which injection molding is carried out in a state where a ladder section is positioned in a mold, and subsequently the necessary components are inserted from one end side of the cylindrical space 13; and a manufacturing process in which injection molding is carried out in a state where a ladder section is positioned in a mold, then the first housing is cast from the first end section 11 to a section on which the ladder section 50 is provided, after which injection molding is carried out in a state where a result in which the necessary components from both end sides of the cylindrical space 13 are inserted is again positioned in the mold, and subsequently the second housing (bottom clip) is cast from the section on which the ladder section 50 is provided to the second end section 12.

[0055] Next are the actions when the electrical circuit breaker device 1, shown in Fig. 1, positioned in a part of an electrical circuit of an electric vehicle, is described. The electrical circuit interrupter 1, shown in Fig. 1. It can be combined with a sensor or the like that detects an anomalous current and, for example, when an anomalous current flows into the electrical circuit, can automatically initiate an actuation, or can be artificially actuated.

[0056] In a case where the electrical circuit interrupter device 1 is positioned in the electrical circuit, a conductor cable defining the electrical circuit is connected to hole 51a of the first connecting section 51 and to hole 52a of the second connecting section 52 of conductor section 50. When an anomaly occurs in the electrical circuit, the igniter 20 operates to generate a combustion product from the ignition section 21. Since the ignition section 21 is surrounded on a first end-opening section 31 side of the cylinder 30, the generated combustion product spreads directly into the cylinder 30 to strike the rod section 41 of the projectile 40.

[0057] The projectile 40, which has been subjected to pressure by the combustion product, moves in the axial direction to cut the cutting section 53 from the conductor section 50 through the end-enlarged-diameter section 42. At this point, as in Fig. 1 and Fig. 2A and Fig. As shown in 2B, each of the 1a fraction section 55a and the 1b fraction section 55b is a groove section that is square or right-angled in a planar form, enclosed on the three sides, and each of the 2a fraction section 54a and the 2b fraction section 54b is a groove section that is square or right-angled in a planar form, enclosed by the three sides. Therefore, when pressure is applied to the 2a fracture section 54a and the 2b fracture section 54b by the cutting section 53 through the rod-like projectile 40, a thinned section having a uniform thickness between the 1a 55a and the 2a fracture section 54a and a thinned section having a uniform thickness between the 1b fracture section 55b and the 2b fracture section 54b are stretched to reduce the cross-sectional areas, and thus the cutting section 53 can be easily cut.If the 1a fracture section 55a, the 1b fracture section 55b, and the 2a fracture section 54a and the 2b fracture section 54b are not perpendicular, and are a groove section having an inclined side, such as a V-shaped groove section, and a trapezoidal groove section, even if a section between the 1a fracture section 55a and the 2a fracture section 54a; and a section between the 1b fracture section 55b and the 2b fracture section 54b are narrow, the thicknesses of these sections are not uniform, which is not preferred because the elongation when pressure is applied by the rod-like projectile 40 is weak, and it is difficult to cut.

[0058] Then, as in Fig. As shown in Figure 3, the end-enlarged-diameter section 42 and a cutting piece 50a are moved from the cutting section 53 into the insulating-closure chamber 61 and held in an electrically insulating position. This action electrically interrupts the first connecting section 51 and the second connecting section 52 at both ends of the conductor section 50, thus interrupting the electrical circuit on which the device 1 is positioned. (2) Electrical circuit breaker device, shown in Fig. 4

[0059] An electrical circuit breaker device 100, shown in Fig. 4 is essentially the same as the electrical circuit breaker device 1, shown in Fig. 1, except that one form of a rod-like projectile 140, one form of a cylindrical space 113, and one form of the cylinder 130 differ from the electrical circuit breaker device 1, as shown in Fig. 1.

[0060] A housing (resin housing) 110, made of a synthetic resin, has a cylindrical space 113 that extends from a first end section 111 to a conductor section 150 on a second end section 112. The cylindrical space 113 includes a large-diameter cylindrical space 113a on the first end section side and a small-diameter cylindrical space 113b on the second end section 112 side.

[0061] The rod-like projectile 140 comprises a base section 141 and a rod section 145, with the outer diameter of the base section 141 being larger than the outer diameter of the rod section 145. The cross-sectional shape of the base section 141 in the casing width direction is circular, and the cross-sectional shape of the rod section 145 in the casing width direction is rectangular. The base section 141 comprises a first base section 142 facing a fuze 120, a third base section 144 contacting the rod section 145, and a second base section 143 positioned between them. A surface 142a of the first base section 142 on the fuze 120 side has a recess section in a curved surface shape, with a central section that is the deepest and is receptive to absorb a pressure generated by the fuze 120 in actuation.The outer diameters of the first base section 142 and the third base section 144 are essentially the same and abut an inner circumferential surface of the cylinder 130. The outer diameter of the second base section 143 is smaller than the outer diameters of the first base section 142 and the third base section 144. Therefore, an O-ring 146 is positioned in an annular space around the second base section 143, which is formed due to the difference in their outer diameters.

[0062] The cylinder 130 serves to reinforce the casing 110 and is made of a metal, such as stainless steel or aluminum; and a fiber-reinforced resin, such as a carbon fiber-reinforced resin. A cross-sectional shape of the cylinder 130 in the casing width direction is circular. The cylinder 130 surrounds an ignition section 121 of the detonator 120 and the projectile 140 and is pressed into the cylindrical space 113 to be fixed and not move axially. On a second end section 130a side of the cylinder 130, a plurality of sets of two cuts are formed at a plurality of locations at equal intervals. The sets of two cuts positioned at predetermined intervals are curved inwards, and thus each curved section acts as a guide 131 for the rod section 145.

[0063] The conductor section 150 is for forming part of an electrical circuit when the device 100 is attached to the electrical circuit. The conductor section 150 is a plate section comprising a first connecting section 151 and a second connecting section 152 at both end faces; and a cutting section 153 at the intermediate section. The cutting section 153 is the same as the cutting section 53 shown in Fig. 2A and Fig. 2B. The first connecting section 151 and the second connecting section 152 are for connecting to other conductors (for example, line cables) in the electrical circuit, and the cutting section 153 is to be cut in order to interrupt the electrical circuit during an activation.

[0064] The conductor section 150 is positioned with a surface of the cutting section 153 orthogonal to the axial direction of the housing 110. The surface of the cutting section 153 of the conductor section 150 faces an end surface of the rod section 145 of the projectile 140. Fig. 4, the surface of the cutting section 153 and the end surface of the rod section 145 are adjacent to each other, and can also be facing each other in an interval.

[0065] An insulating sealing space 160 is formed between the conductor section 150 and the second end section 112 of the housing. The insulating sealing space 160 has a square cross-sectional shape in the housing width direction and has an opening section 161 facing the conductor section 150, a sealed end surface 162 opposite the opening section 161 in the housing axial direction, and four side surfaces 163 between the opening section 161 and the sealed end surface 162.

[0066] Examples of a manufacturing process applicable to the electrical circuit breaker device 100, illustrated in Fig. 4, comprising: a manufacturing process in which injection molding is carried out in a state where a ladder section is positioned in a mold, and subsequently the necessary components are inserted from one end side of the cylindrical space 113; and a manufacturing process in which injection molding is carried out in a state where a ladder section is positioned in a mold, then the first housing is cast from the first end section 111 to a section on which the ladder section 150 is provided, then injection molding is carried out in a state where a result in which the necessary components are inserted from both end sides of the cylindrical space 113 is repeatedly positioned in the mold, and subsequently the second housing (bottom clip) is cast from the section on which the ladder section 150 is provided to the second end section 112.

[0067] If the electrical circuit breaker is 100in Fig. When 4 is activated, the electrical circuit breaker 100 operates in the same way as the electrical circuit breaker 1, as shown in Fig. 1, to cut the conductor section 150, and then the first connecting section 151 and the second connecting section 152 at both ends of the conductor section 150 are electrically interrupted, so that the electrical circuit on which the device 100 is positioned is interrupted. At this point, the cutting section 153 has the same structure as the cutting section 53, shown in Fig. 2A and Fig. 2B, and is therefore easy to cut.

[0068] The electrical circuit interrupter device according to an embodiment of the present invention can be positioned in various electrical circuits and is practically suitable for electrical circuits included in vehicle batteries (for example, lithium-ion batteries), for electrical circuits of electric vehicles, and for electrical circuits of household electrical appliances.

[0069] The present invention has been described above. Naturally, the present invention includes various forms of modification within its scope, and these modifications do not deviate from the scope of the invention. Everything that would be clearly considered a variation of the present invention by a person skilled in the art is within the scope of the claims set forth below.

Claims

[1] An electrical circuit breaker device (1) comprising: in a housing (10) made of a synthetic resin, a detonator (20), a rod-shaped projectile (40) made of a synthetic resin, a conductor section (50) to form part of an electrical circuit, positioned in this order from a first end section (11) of the housing (10) to a second end section (12) opposite the first end section (11) in a housing axial direction, and an insulating sealing space (60) between the second end section (12) of the housing (10) and the conductor section (50), wherein the conductor section (50) is a plate section comprising: a first connecting section (51) and a second connecting section (52) at both end sides; and a cutting section (53) at an intermediate section, the conductor section (50) is positioned with a surface of the cutting section (53) orthogonal to the housing axial direction in a housing width direction, and The rod-like projectile (40) is positioned to face the surface of the cutting section (53) of the conductor section (50) in the housing axial direction. characterized by , that The cutting section (53) includes: a 1a fracture section (55a) and a 1b fracture section (55b) formed at two locations on the second end section side, at an interval in the case width direction, each of the fracture sections (55a, 55b) is a groove section that is square or right-angled in a planar form, surrounded by three sides, and a width (W1) of the 1a fraction section (55a) and a width (W1) of the 1b fraction section (55b), the dimensions being in the housing width direction, which are the same to each other, and the width (W1) is 5 mm or less in length, wherein The corners (64) of the insulation closure space (60) are facing both the 1a fracture section (55a) and the 1b fracture section (55b) of the cutting section (53) in the housing axial direction, the corners (64) of the insulation closure space (60) are arranged outside of positions in the housing width direction that coincide with a central axis of the 1a fracture section (55a) of the cutting section (53) in the housing axial direction or coincide with the central axis of the 1b fracture section (55b) in the housing axial direction. [2] The electrical circuit breaker device (1) according to claim 1, characterized by, that a thickness (t1) and a thickness (t2), which are dimensions in the housing axial direction, are each a thickness of a section of the cutting section (53) on which the 1b fracture section (55a) and the 1b fracture section (55b) are not formed; and a thickness of a section of the cutting section (53) on which the 1a fracture section (55a) and the 1b fracture section (55b) are formed, wherein the thickness (t1) and the thickness (t2) satisfy a relationship of t2 / t1 = from 0.2 to 0.

7. [3] An electrical circuit breaker device (1) comprising: in a housing (10) made of a synthetic resin, a detonator (20), a rod-shaped projectile (40) made of a synthetic resin, a conductor section (50) to form part of an electrical circuit, positioned in this order from a first end section (11) of the housing (10) to a second end section (12) opposite the first end section (11) in a housing axial direction, and an insulating sealing space (60) between the second end section (12) of the housing (10) and the conductor section (50), wherein the conductor section (50) is a plate section comprising: a first connecting section (51) and a second connecting section (52) at both end sides; and a cutting section (53) at an intermediate section, the conductor section (50) is positioned with a surface of the cutting section (53) orthogonal to the housing axial direction in a housing width direction, The rod-like projectile (40) is positioned to face the surface of the cutting section (53) of the conductor section (50) in the housing axial direction, and characterized by , that the cutting section (53) includes: a 2a-fracture section (54a) and a 2b-fracture section (54b) formed on a surface of the same on the first end-section side, at two locations in an interval in the case width direction, each of the fracture sections (54a, 54b) is a groove section that is square or right-angled in a planar form, surrounded by three sides, and a 1a-fracture section (55a) and a 1b-fracture section (55b) formed on a surface of the same on the second end-section side, at two locations, in an interval in the case width direction, each of the fracture sections (55a, 55b) is a groove section that is square or rectangular in a planar form, surrounded by three sides, A central axis of the 2a fracture section (54a) in the case axial direction coincides with a central axis of the 1a fracture section (55a) in the case axial direction, and a central axis of the 2b fracture section (54b) in the case axial direction coincides with a central axis of the 1b fracture section (55b) in the case axial direction, and a width (W1) of the 1a fraction section (55a) is the same as a width (W1) of the 1b fraction section (55b), a width (W2) of the 2a fraction section (54a) is the same as a width (W2) of the 2b fraction section (54b), the widths W1 and W2 are dimensions in the case width direction, and W1 and W2 have the relationship W1 ≥ W2. [4] The electrical circuit breaker device (1) according to claim 3, characterized by , that W1 is 5 mm or less in length, and W2 is 5 mm or less in length of the cutting section (53). [5] The electrical circuit breaker device (1) according to claim 3 or 4, characterized by, that a thickness (t11) and a thickness (t12), which are dimensions in the housing axial direction, are each a thickness of a section of the cutting section (53) on which the 1a fracture section (55a), the 1b fracture section (55b), the 2a fracture section (54a), and the 2b fracture section (54b) are not formed; and a thickness of a section of the cutting section (53) on which the 1a fracture section (55a), the 1b fracture section (55b), the 2a fracture section (54a), and the 2b fracture section (54b) are formed, wherein the thickness (t11) and the thickness (t12) satisfy a relationship of t12 / t11 = from 0.2 to 0.7.

Images