Sliding structure, electrical circuit breaker, and method of operating the sliding structure

Abstract

The technology disclosed herein aims to provide a technology that can suppress the occurrence of cracks in the projectile or the object against which the projectile collides. [Solution] The sliding structure comprises a housing that encloses a containment space extending in one direction, an igniter provided in the housing, a projectile positioned within the containment space and launched from one end of the containment space by energy received from the igniter, which slides along the extending direction of the containment space, and a buffer provided in a terminal regulating part that defines the sliding end position of the projectile.

Description

Technical Field

[0001] The present invention relates to a sliding structure, an electric circuit breaker, and an operating method of the sliding structure.

Background Art

[0002] Conventionally, as a device for sliding a projectile by energy applied from an igniter or the like, for example, an electric circuit breaker is known (see, for example, Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] The projectile slides at high speed by energy applied from an igniter or the like. A part of the projectile stops by colliding with other parts inside the device, but there is a risk that the projectile or the collision partner of the projectile may crack due to the impact force when the projectile collides with other parts at the time of stopping.

[0005] The technology of the present disclosure aims to provide a technology capable of suppressing the occurrence of cracks in the projectile or the collision partner of the projectile.

Means for Solving the Problems

[0006] (Aspect 1) A housing enclosing a housing space extending in one direction, An igniter provided in the housing, A projectile disposed in the housing space, launched from one end side of the housing space by energy received from the igniter, and sliding along the extending direction of the housing space, A buffer material is provided in the end-limiting section that defines the sliding end position of the projectile, A sliding structure equipped with [a specific feature]. (Aspect 2) A sliding structure according to Embodiment 1, The termination restrictor is formed as part of the housing, The cushioning material may be flexible and placed between the projectile and the terminal restrictor after sliding. (Aspect 3) A sliding structure according to embodiment 1 or 2, The termination restrictor may be provided in a portion of the housing that extends outward in the axial direction of the housing. (Aspect 4) A sliding structure according to any one of the embodiments 1 to 3, The cushioning material may be fixed by being sandwiched above and below in the axial direction, outside the axial direction of the housing, at a point where it contacts the projectile. (Appendix 5) A sliding structure according to any one of embodiments 1 to 4, The thickness of the cushioning material may be 4.0 mm to 5.0 mm. (Aspect 6) A sliding structure according to any one of the embodiments 1 to 5, When viewed from a direction perpendicular to the axial direction of the housing, the cushioning material may have a stepped shape. (Aspect 7) A sliding structure according to any one of embodiments 1 to 6, The projectile may have chamfered edges on the surfaces that are intended to come into contact with the buffer material. (Pattern 8) A sliding structure according to any one of the embodiments 1 to 7, The corners of the surface of the cushioning material that is intended to come into contact with the projectile may be chamfered. (Aspect 9) A sliding structure according to any one of embodiments 1 to 8, The buffer material may have a groove extending outward in a direction orthogonal to the axial direction of the housing. (Aspect 10) A sliding structure according to any one of Aspects 1 to 9, The hardness of the buffer material may be 45 to 55 degrees. (Aspect 11) A sliding structure according to any one of Aspects 1 to 10, The buffer material may be formed of silicone rubber. (Aspect 12) A sliding structure according to any one of Aspects 1 to 11, and A conductor piece provided in the housing and forming a part of an electric circuit, the part having a cut-off portion cut by the emitter, and the cut-off portion being arranged to cross the accommodation space, An electric circuit interruption device including the above may be provided. [[ID=2I]]

[0007] Also, the present disclosure can be grasped from the aspect of the operation method of the sliding structure. (Aspect 13) Actuating an igniter to apply energy to the emitter for sliding the emitter inside the housing, Sliding the emitter with a buffer material provided at a terminal regulating portion that defines the sliding end position of the emitter, An operation method of the sliding structure including the above may be provided.

[0008] The contents described in the means for solving the problems can be combined as much as possible without departing from the problems and technical ideas of the present disclosure.

Advantages of the Invention

[0009] According to the present disclosure, it is possible to suppress cracks from occurring in the emitter or other parts that become the collision partner of the emitter.

Brief Description of the Drawings

[0010] [Figure 1]FIG. 1 is a diagram for explaining the internal structure of the electric circuit breaker according to Embodiment 1. [Figure 2] FIG. 2 is a cross-sectional view taken along line A-A shown in FIG. 1. [Figure 3] FIG. 3 is a cross-sectional view taken along line B-B shown in FIG. 1. [Figure 4] FIG. 4 is a top view of the upper housing body. [Figure 5] FIG. 5 is a longitudinal cross-sectional view taken along line C-C shown in FIG. 4 of the upper housing body. [Figure 6] FIG. 6 is a longitudinal cross-sectional view taken along line D-D shown in FIG. 4 of the upper housing body. [Figure 7] FIG. 7 is a bottom view of the upper housing body. [Figure 8] FIG. 8 is a top view of the lower housing body. [Figure 9] FIG. 9 is a longitudinal cross-sectional view taken along line E-E shown in FIG. 8 of the lower housing body. [Figure 10] FIG. 10 is a longitudinal cross-sectional view taken along line F-F shown in FIG. 8 of the lower housing body. [Figure 11] FIG. 11 is a bottom view of the lower housing body. [Figure 12] FIG. 12 is a front view of the emitter. [Figure 13] FIG. 13 is a bottom view of the emitter. [Figure 14] FIG. 14 is a perspective view of the emitter. [Figure 15] FIG. 15 is a diagram for explaining the operating state of the circuit breaker 1 according to Embodiment 1. [Figure 16] FIG. 16 is a flowchart regarding the operating method of the circuit breaker 1 according to Embodiment 1. [Figure 17] FIG. 17 is a diagram for explaining the electric circuit breaker according to Embodiment 2. [Figure 18] FIG. 18 is a diagram showing an enlarged view of the periphery of the cushioning material. [Figure 19] FIG. 19 is a diagram showing an enlarged view of the periphery of the cushioning material. [Figure 20]Figure 20 is a cross-sectional view showing only the cushioning material used in the electrical circuit breaker according to Embodiment 3. [Figure 21] Figure 21 is a cross-sectional view showing only the cushioning material used in the electrical circuit breaker according to Embodiment 4. [Figure 22] Figure 22 is a diagram illustrating an electrical circuit breaker according to Embodiment 5. [Figure 23] Figure 23 is a diagram illustrating an electrical circuit breaker according to Embodiment 5. [Modes for carrying out the invention]

[0011] <Embodiment 1> An electrical circuit breaker according to Embodiment 1 of this disclosure will be described below with reference to the drawings. Note that the configurations and combinations thereof in the embodiment are examples, and additions, omissions, substitutions, and other modifications can be made as appropriate without departing from the spirit of this disclosure. This disclosure is not limited by the embodiments, but is limited only by the scope of the claims. Furthermore, in this specification, descriptions of numerical ranges such as "X or more and Y or less" or "X~Y" mean a numerical range including the lower and upper limits, which are the endpoints, unless otherwise specified.

[0012] In this embodiment, an electrical circuit interruption device will be described as an example of a sliding structure. The electrical circuit interruption device is a device that includes a sliding structure for sliding a projectile, and interrupts an electrical circuit by cutting a conductive piece that forms part of the electrical circuit with the projectile. In this embodiment, the electrical circuit interruption device slides the projectile at high speed using energy supplied from an igniter or the like, forcibly and physically cutting a conductive piece that forms part of the electrical circuit. The electrical circuit interruption device is a device that prevents major damage by interrupting an electrical circuit in the event of an abnormality in an electrical circuit included in an automobile, household electrical appliance, solar power generation system, etc., or in a system including the battery (e.g., lithium-ion battery) of said electrical circuit.

[0013] <Structure> Figure 1 is a diagram illustrating the internal structure of the electrical circuit breaker (hereinafter simply referred to as "breaker") 1 according to this embodiment, Figure 2 is a cross-sectional view along line AA shown in Figure 1, and Figure 3 is a cross-sectional view along line BB shown in Figure 1. In this specification, the cross-section along the height direction (the direction in which the accommodation space 13, described later, extends) shown in Figure 1 is referred to as the longitudinal cross-section of the breaker 1, and the cross-section in a direction perpendicular to the height direction is referred to as the transverse cross-section of the breaker 1. Figure 1 shows the state of the breaker 1 before operation.

[0014] The shutoff device 1 comprises a housing 10, an igniter 20, a projectile 40, a conductive piece 50, a coolant material 60, etc. The housing 10, as an outer shell member, extends from the first end 11 on the upper end downwards It contains a housing space 13 that extends in the direction of the second end 12 at the end. This housing space 13 is a linearly formed space that allows the projectile 40 to move, and extends along the vertical direction of the interceptor 1. As shown in Figure 1, the projectile 40 is housed at the upper end of the housing space 13 formed inside the housing 10 in the vertical direction (extension direction). In this specification, the vertical direction is also referred to as the Y-axis direction, the left-right direction as the X-axis direction, and the depth direction as the Z-axis direction. However, in this specification, the vertical direction and XYZ direction of the interceptor 1 merely indicate the relative positional relationship of each element in the interceptor 1 for the convenience of describing the embodiments. For example, the orientation when installing the interceptor 1 is not limited to the direction shown in the figure.

[0015] [housing] The housing 10 includes a housing body 100, a top holder 110, and a bottom container 120. The top holder 110 and the bottom container 120 are attached to the housing body 100, thereby forming an integrated housing 10.

[0016] The housing body 100 is divided vertically at the boundary where the conductor piece 50 is arranged, and has an upper housing body 130 located above the conductor piece 50 and a lower housing body 140 located below the conductor piece 50. However, the housing body 100 is not limited to this divided configuration and may be integrally formed from the upper end connected to the top holder 110 to the lower end connected to the bottom container 120.

[0017] The housing body 100, when the upper housing body 130 and the lower housing body 140 are combined, has an outer shape that is, for example, roughly rectangular prism-shaped. However, the shape of the housing body 100 is not particularly limited. Furthermore, the housing body 100 is formed so that a cavity runs through it in the vertical direction, and this cavity forms part of the storage space 13. In addition, the housing body 100 has an upper surface 101 to which the flange portion 111 of the top holder 110 is fixed, and a lower surface 102 to which the flange portion 121 of the bottom container 120 is fixed. In this embodiment, a cylindrical upper cylindrical wall 103 is erected on the outer circumference of the upper surface 101 of the housing body 100, extending upward from the upper surface 101. In this embodiment, the upper cylindrical wall 103 has a rectangular cylindrical shape, for example, but it may have other shapes. Furthermore, a cylindrical lower cylindrical wall 104 is erected on the outer circumference of the lower surface 102 of the housing body 100, extending downward from the lower surface 102. In this embodiment, the lower cylindrical wall 104 has, for example, a rectangular cylindrical shape, but it may have other shapes.

[0018] The inside of the upper surface 101 of the upper housing body 130 is an example of a terminal restricting section that terminates the sliding of the projectile 40. Thus, the upper surface 101 formed as part of the housing body 100 becomes the terminal restricting section. In this embodiment, the terminal restricting section is provided on the upper surface 101 that extends outward in the axial direction of the housing body 100, where a part of the housing body 100 is located. A buffer material 150 is provided on the upper surface 101 that defines the sliding end position of the projectile 40. The buffer material 150 is arranged on the upper surface 101. The buffer material 150 is provided to prevent the projectile 40 and the housing body 100 from directly colliding and causing cracks in at least one of the projectile 40 or the housing body 100. In a top view, the buffer material 150 has an annular shape and is arranged concentrically with the center of the housing space 13 (cavity 135) (see Figure 4, which will be described later). The cushioning material 150 is arranged to surround the entire circumference of the containment space 13 and the rod portion 42 of the projectile 40. The placement and number of cushioning materials 150 are not limited to these and can be changed as appropriate. The cushioning material 150 is made of a non-conductive and elastic material; in this embodiment, silicone rubber is used for the cushioning material 150. The cushioning material 150 is a flexible component. More specifically, vinyl methyl silicone rubber (VMQ) is used for the cushioning material 150. The hardness of the cushioning material 150 is preferably 45 to 55 degrees. Furthermore, the thickness of the cushioning material 150 is preferably 4.0 mm to 5.0 mm.

[0019] Next, the upper housing body 130 will be described. Figure 4 is a top view of the upper housing body 130, Figure 5 is a longitudinal cross-sectional view of the upper housing body 130 along line CC shown in Figure 4, Figure 6 is a longitudinal cross-sectional view of the upper housing body 130 along line DD shown in Figure 4, and Figure 7 is a bottom view of the upper housing body 130. Figures 4 to 6 also show the cushioning material 150 placed on the upper surface 101 of the upper housing body 130.

[0020] As shown in Figures 4 and 7, the upper housing body 130 has a roughly rectangular shape in plan view, with a cavity 135 in the center. This cavity 135 forms part of the housing space 13 when the upper housing body 130 is combined with other components that make up the housing 10.

[0021] The inner wall 133 defining the cavity 135 of the upper housing body 130 forms a circular peripheral wall, and a groove 131 that expands in diameter in the outer diameter direction of the upper housing body 130 is provided in a part of it. The groove 131 extends along the extension direction (vertical direction) of the housing space 13. Two grooves 131 are formed in the Z-axis direction so as to be symmetrical with respect to the X-axis.

[0022] Furthermore, as shown in Figures 4 and 7, the upper housing body 130 has bolt holes 132 that penetrate vertically at all four corners. A rectangular tubular upper wall 103 is erected on the outer edge of the upper surface of the upper housing body 130, extending upward from the upper surface.

[0023] Next, the lower housing body 140 will be described. Figure 8 is a top view of the lower housing body 140, Figure 9 is a longitudinal section of the lower housing body 140 along the EE line shown in Figure 8, Figure 10 is a longitudinal section of the lower housing body 140 along the FF line shown in Figure 8, and Figure 11 is a bottom view of the lower housing body 140.

[0024] As shown in Figure 8, the lower housing body 140 has a roughly rectangular shape in plan view, with a cavity 145 defined in the center by an inner wall 143. The cavity 145 is formed in a cylindrical shape, and the inner wall 143 forms a circular peripheral wall when viewed from above or below. The cavity 145 forms part of the housing space 13 when the lower housing body 140 is combined with other members that make up the housing 10. Conductor piece holding portions 144, which are recesses into which the conductor piece 50 is fitted, are provided on the left and right sides of the cavity 145. The conductor piece holding portions 144 are shaped by recessing the upper surface of the lower housing body 140 downwards along the contour of the conductor piece 50. By fitting the end of the conductor piece 50 into these conductor piece holding portions 144, the conductor piece 50 is positioned to cross the cavity 145 (housing space 13).

[0025] As shown in Figures 8 and 11, the lower housing body 140 has bolt holes 142 that penetrate vertically at all four corners. A rectangular cylindrical lower wall 104 is vertically attached to the outer edge of the lower surface of the lower housing body 140, extending downward from the lower surface.

[0026] The upper housing body 130 and the lower housing body 140, configured as described above, can be formed from an insulating material such as synthetic resin. For example, the upper housing body 130 and the lower housing body 140 may be made of polycarbonate or nylon, which is a type of polyamide synthetic resin.

[0027] [Top Holder] Next, the top holder 110 will be described with reference to Figure 1. The top holder 110 is, for example, a cylinder member having a stepped cylindrical shape, and the inside is hollow. The top holder 110 has a small diameter cylinder portion 112 located on the upper side (first end 11 side), a large diameter cylinder portion 113 located on the lower side, a connecting portion 114 that connects them, and a large diameter cylinder The structure includes a flange portion 111 and the like that extends outward from the lower end of the portion 113. For example, the small-diameter cylinder portion 112 and the large-diameter cylinder portion 113 are arranged coaxially, and the large-diameter cylinder portion 113 has a diameter that is slightly larger than the small-diameter cylinder portion 112.

[0028] Furthermore, the contour of the flange portion 111 of the top holder 110 has a roughly rectangular shape that fits inside the upper cylindrical wall 103 of the housing body 100. The flange portion 111 is provided with bolt holes (not shown) that pass through in the vertical direction for fastening bolts.

[0029] The cavity formed inside the small-diameter cylinder portion 112 of the top holder 110 functions as a housing space for accommodating a part of the igniter 20, as shown in Figure 1. Furthermore, the cavity formed inside the large-diameter cylinder portion 113 of the top holder 110 communicates with the cavity in the housing body 100 located below, forming part of the housing space 13. The top holder 110, configured as described above, can be made from a suitable metal material such as stainless steel or aluminum, which have excellent strength and durability. However, the material used to form the top holder 110 is not particularly limited. Also, the above-described shape of the top holder 110 is merely an example, and other shapes may be adopted.

[0030] [Bottom container] Next, the bottom container 120 will be described. The bottom container 120 has a generally bottomed cylindrical shape with a hollow interior and is composed of a side wall portion 122, a bottom wall portion 123 connected to the lower end of the side wall portion 122, a flange portion 121 connected to the upper end of the side wall portion 122, etc. The side wall portion 122 has, for example, a cylindrical shape, and the flange portion 121 extends outward from the upper end of the side wall portion 122. The contour of the flange portion 121 in the bottom container 120 has a generally rectangular shape that fits inside the lower cylindrical wall 104 of the housing body 100. The flange portion 121 is provided with bolt holes (not shown) that penetrate vertically for fastening bolts.

[0031] The above description of the shape of the bottom container 120 is merely an example, and other shapes may be adopted. Furthermore, the cavity formed inside the bottom container 120 communicates with the housing body 100 located above it, forming part of the storage space 13. The bottom container 120, configured as described above, can be made from suitable metal materials such as stainless steel or aluminum, which have excellent strength and durability. However, the material used to form the bottom container 120 is not particularly limited. The bottom container 120 may also have a multi-layer structure. For example, the exterior of the bottom container 120 facing the outside may be made from suitable metal materials such as stainless steel or aluminum, which have excellent strength and durability, while the interior facing the storage space 13 may be made from an insulating material such as synthetic resin. Of course, the entire bottom container 120 may also be made from an insulating material.

[0032] As described above, the housing 10 in this embodiment is constructed by integrally assembling the top holder 110, the upper housing body 130, the lower housing body 140, and the bottom container 120 in the vertical direction. During this assembly process, the conductor piece 50 is positioned through the housing body 100. For example, the conductor piece 50 is fitted into the conductor piece holding portion 144 of the lower housing body 140, and the conductor piece is positioned so as to cross the cavity portion 145. In this state, the lower surface of the upper housing body 130 is abutted against the upper surface of the lower housing body 140 so that the bolt holes 142 of the lower housing body 140 and the bolt holes 132 of the upper housing are coaxial. Furthermore, the flange portion 111 of the top holder 110 is fitted inside the upper cylindrical wall 103 of the upper housing body 130, thereby positioning the top holder 110 on the upper housing body 130, and the flange portion 121 of the bottom container 120 is fitted inside the lower cylindrical wall 104 of the lower housing body 140, thereby positioning the bottom container 120 on the lower housing body 140. It is placed below the main body 140. Then, bolts are passed through the bolt holes in the top holder 110, the upper housing body 130, the lower housing body 140, and the bottom container 120 to fasten each part together. Note that this fastening is not limited to bolts; other fastening means such as rivets may also be used.

[0033] Furthermore, sealant may be applied between the top holder 110 and the upper housing body 130, between the upper housing body 130 and the lower housing body 140 and the conductor piece 50, between the lower housing body 140 and the conductor piece 50, and between the lower housing body 140 and the bottom container 120 before joining the parts. This can improve the airtightness of the containment space 13 formed inside the housing 10. Alternatively, instead of sealant, or in combination with sealant, packings or gaskets may be interposed between the parts to improve the airtightness of the containment space 13. The containment space 13 houses the igniter 20, projectile 40, the cut-off portion 53 of the conductor piece 50, and the coolant material 60, which will be described in detail below.

[0034] [Igniter] Next, the igniter 20 will be described. The igniter 20 is an electric igniter comprising an ignition unit 21 containing an ignition charge and an igniter body 22 having a pair of conductive pins (not shown) connected to the ignition unit 21. The igniter body 22 is surrounded by, for example, an insulating resin. The tips of the pair of conductive pins in the igniter body 22 are exposed to the outside and are connected to the power supply when the shut-off device 1 is used.

[0035] The igniter body 22 comprises a roughly cylindrical main body 221 housed inside the small-diameter cylinder portion 112 of the top holder 110, and a connector portion 222 located on the upper part of the main body 221. The igniter body 22 is fixed to the small-diameter cylinder portion 112, for example, by press-fitting the main body 221 into the inner circumferential surface of the small-diameter cylinder portion 112. In addition, a constricted portion, which is recessed on the outer circumferential surface of the main body 221, is formed in an annular shape along the circumferential direction of the main body 221 in the axial middle portion, and an O-ring 223 is fitted into this constricted portion. The O-ring 223 is made of, for example, rubber (e.g., silicone rubber) or synthetic resin, and functions to improve airtightness between the inner circumferential surface of the small-diameter cylinder portion 112 and the main body 221.

[0036] The connector portion 222 in the igniter 20 is positioned to protrude to the outside through an opening 112A formed at the upper end of the small-diameter cylinder portion 112. The connector portion 222 has, for example, a cylindrical shape that covers the sides of the conductive pins and is configured to connect to the power supply side connector.

[0037] As shown in Figure 1, the ignition unit 21 of the igniter 20 is positioned to face the housing space 13 of the housing 10 (more specifically, the cavity formed inside the large-diameter cylinder portion 113). The ignition unit 21 is configured, for example, to house the igniter in an igniter cup. For example, the igniter is housed in the igniter cup of the igniter unit 21 in contact with a bridge wire (resistor) that is strung together to connect the base ends of a pair of conductive pins. Examples of igniters include ZPP (zirconium potassium perchlorate) and ZWPP (zirconium potassium perchlorate). Materials such as conium tungsten potassium perchlorate, THPP (titanium hydride potassium perchlorate), and lead tricinate may also be used.

[0038] When the igniter 20 is activated, an operating current for igniting the igniter is supplied from the power source to the conductive pin. As a result, the bridge wire in the ignition unit 21 heats up, causing the igniter in the igniter cup to ignite and burn, generating combustion gas. Then, as the igniter burns in the igniter cup of the igniter unit 21, the pressure inside the igniter cup increases, causing the split surface 21A of the igniter cup to split, and the combustion gas is released from the igniter cup into the containment space 13. More specifically, The combustion gases from the igniter cup are released into the recess 411 of the piston portion 41 of the projectile 40, which will be described later, located within the containment space 13.

[0039] [Projectile] Next, the projectile 40 will be described. Figure 12 is a front view of the projectile 40, Figure 13 is a bottom view of the projectile 40, and Figure 14 is a perspective view of the projectile 40. In Figure 14, the bottom surface of the projectile 40 is shown facing upwards in order to show the bottom surface of the projectile 40. The projectile 40 is formed of an insulating material such as synthetic resin. As shown in Figure 13, the cross-section of the projectile 40 is round when cut in a direction perpendicular to the radial direction. In this embodiment, the cross-section of the projectile 40 is approximately a perfect circle. The projectile 40 includes a piston portion 41 and a rod portion 42 connected to the piston portion 41. The piston portion 41 has a generally cylindrical shape and an outer diameter that roughly corresponds to the inner diameter of the large-diameter cylinder portion 113 in the top holder 110. For example, the diameter of the piston portion 41 may be slightly smaller than the inner diameter of the large-diameter cylinder portion 113. The shape of the projectile 40 can be appropriately changed according to the shape of the housing 10, etc.

[0040] Furthermore, a cylindrical recess 411 is formed on the upper surface of the piston portion 41, and the ignition unit 21 is received in this recess 411. The bottom surface of the recess 411 is formed as a pressure receiving surface 411A that receives energy from the ignition unit 20 when the ignition unit 20 is in operation. In addition, a constricted portion, which is recessed on the outer circumference of the piston portion 41, is formed in an annular shape along the circumferential direction of the piston portion 41 in the axial middle portion, and an O-ring 43 is fitted into this constricted portion. The O-ring 43 is made of rubber (e.g., silicone rubber) or synthetic resin, and functions to improve airtightness between the inner circumferential surface of the large-diameter cylinder portion 113 and the piston portion 41.

[0041] The rod portion 42 of the projectile 40 is, for example, a rod-shaped member having a smaller outer diameter than the piston portion 41, and is integrally connected to the lower end side of the piston portion 41. The lower end surface of the rod portion 42 is formed as a cutting surface 420 for cutting off the portion to be cut off 53 from the conductor piece 50 when the shut-off device 1 is activated. In this embodiment, the rod portion 42 has a generally cylindrical shape, but its shape is not particularly limited and can be changed according to the shape and size of the portion to be cut off 53 from the conductor piece 50 when the shut-off device 1 is activated. The rod portion 42 may have a columnar shape such as a cylinder or a rectangular prism. In the initial position of the projectile 40 shown in Figure 1, the tip-side region of the rod portion 42 of the projectile 40, including the cutting surface 420, is located in the cavity of the housing body 100 (forming part of the housing space 13). The diameter of the rod portion 42 is, for example, slightly smaller than the inner diameter of the inner circumferential surface of the housing body 100, so that the outer circumferential surface of the rod portion 42 is guided along the inner circumferential surface when the projectile 40 is launched.

[0042] As described above, the projectile 40, when the igniter 20 is activated, receives energy from the igniter 20, and the upper surface of the piston portion 41, including the pressure receiving surface 411A, receives the pressure. This causes the projectile 40 to be launched from the initial position shown in Figure 1 and to move at high speed along the housing space 13 toward the second end 12 (downward). Specifically, as shown in Figure 1, the piston portion 41 of the projectile 40 is housed inside the large-diameter cylinder portion 113 of the top holder 110 and is slidable in the axial direction along the inner wall surface of the large-diameter cylinder portion 113. In this embodiment, the piston portion 41 of the projectile 40 is generally cylindrical, but its shape is not particularly limited. The external shape and size of the piston portion 41 can be appropriately chosen depending on the shape and size of the inner wall surface of the large-diameter cylinder portion 113.

[0043] Furthermore, the corners of the surface of the projectile 40 that is intended to come into contact with the buffer material 150 are chamfered. Specifically, the corner 41A at the joint between the piston portion 41 and the rod portion 42 is chamfered. As a result, the creepage distance between the first connection end 51 and the second connection end 52 can be increased by the amount of chamfering, thereby suppressing a decrease in the insulation resistance value.

[0044] [Conducting piece] Next, the conductor piece 50 will be described. As shown in Figure 2, the conductor piece 50 is fitted into the conductor piece holding portion 144 of the lower housing body 140 and is positioned to cross the housing space 13. The conductor piece 50 extends along the X axis. The conductor piece 50 is a conductive metal body that constitutes part of the components of the circuit breaker 1 and also forms part of the electrical circuit when the circuit breaker 1 is attached to a predetermined electrical circuit, and is sometimes called a bus bar. The body piece 50 can be formed from a metal such as copper (Cu). However, the conductive piece 50 may be formed from a metal other than copper, or from an alloy of copper and another metal. Examples of metals other than copper that can be included in the conductive piece 50 include manganese (Mn), nickel (Ni), and platinum (Pt).

[0045] In one embodiment shown in Figure 2, the conductor piece 50 is formed as an elongated flat plate piece overall, and includes first connection ends 51 and second connection ends 52 at both ends, and a cut-off portion 53 located in the middle portion. Connection holes 51A and 52A are provided at the first connection ends 51 and second connection ends 52 of the conductor piece 50, respectively. These connection holes 51A and 52A are used to connect to other conductors (e.g., lead wires) in an electrical circuit. Note that in Figure 1, the connection holes 51A and 52A of the conductor piece 50 are not shown. The cut-off portion 53 of the conductor piece 50 is the part that is forcibly and physically cut by the rod portion 42 of the projectile 40 and cut off from the first connection ends 51 and second connection ends 52 when an abnormality such as an overcurrent occurs in the electrical circuit to which the circuit breaker 1 is applied. Notches (slits) 54 are formed at both ends of the cut-off portion 53 of the conductor piece 50 to facilitate cutting and removal of the cut-off portion 53.

[0046] The conductor piece 50 is cut at a position where it overlaps with the inner surface (inner wall surface) of the inner wall 143 that defines the cavity 145 of the housing body 100, that is, at a position where it overlaps with the outer surface of the rod portion 42, and the portion to be cut off 53 is cut off. At the first connecting end 51 of the conductor piece 50, the boundary portion between the portion to be cut off 53 and the portion to be cut off 53 is defined as the first cutting edge portion 511, and at the second connecting end 52, the boundary portion between the portion to be cut off 53 and the portion to be cut off 53 is defined as the second cutting edge portion 521.

[0047] Here, the conductor piece 50 can take on various forms, and its shape is not particularly limited. In the example shown in Figure 2, the surfaces of the first connecting end 51, the second connecting end 52, and the cut-off portion 53 form the same plane, but this is not limited to this. For example, the cut-off portion 53 of the conductor piece 50 may be connected to the first connecting end 51 and the second connecting end 52 in a perpendicular or inclined position. Furthermore, the planar shape of the cut-off portion 53 on the conductor piece 50 is not particularly limited. Of course, the shapes of the first connecting end 51 and the second connecting end 52 on the conductor piece 50 are also not particularly limited. In addition, the notch 54 on the conductor piece 50 can be omitted as appropriate.

[0048] [Coolant material] Next, the coolant material 60 placed in the housing space 13 of the housing 10 will be described. As shown in Figure 1, before the shutdown device 1 (igniter 20) is activated, the portion 53 to be cut off of the conductor piece 50, which is held in the pair of conductor piece holding holes 105A and 105B in the housing body 100, is horizontally positioned across the housing space 13 of the housing 10. Hereinafter, the area (space) in the housing space 13 of the housing 10 on the side of the portion 53 to be cut off of the conductor piece 50 where the projectile 40 is positioned will be called the "initial projectile placement area R1," and the area (space) located on the opposite side of the projectile 40 will be called the "arc extinguishing area R2." As described above, since a gap is formed on the side of the portion 53 to be cut off which is positioned across the housing space 13, the initial projectile placement area R1 and the arc extinguishing area R2 are completely closed off by the portion 53 to be cut off They are not isolated from each other; rather, they are in communication. Of course, depending on the shape and size of the section to be cut 53, the initial projectile placement area R1 and the arc extinguishing area R2 may be completely isolated by the section to be cut 53.

[0049] The arc extinguishing region R2 of the containment space 13 is a region (space) for receiving the cut portion 53 that is cut off by the rod portion 42 of the projectile 40 fired when the shutoff device 1 (igniter 20) is activated. Coolant material 60 is placed in this arc extinguishing region R2 as an arc extinguishing material. The coolant material 60 is a coolant that absorbs the heat energy of the arc and the cut portion 53 generated when the projectile 40 cuts off the cut portion 53 of the conductor piece 50, thereby suppressing arc generation when the current is interrupted, or extinguishing (eliminating) the generated arc.

[0050] The arc extinguishing region R2 in the shutoff device 1 is a space for receiving the cut-off portion 53 that has been cut off from the first connecting end 51 and the second connecting end 52 of the conductor piece 50 by the projectile 40, and at the same time, it has significance as a space for effectively extinguishing the arc generated when the projectile 40 cuts off the cut-off portion 53. In order to effectively extinguish the arc generated when the cut-off portion 53 is cut off from the conductor piece 50, a coolant material 60 is placed in the arc extinguishing region R2 as an arc extinguishing material.

[0051] In one embodiment, the coolant material 60 is solid. In another embodiment, the coolant material 60 is formed from a shape-retaining material. A shape-retaining material, as used here, is a material that maintains a constant shape when no external force is applied, and can maintain its integrity (not fall apart) even if deformation occurs when an external force is applied. For example, a fibrous material formed into a desired shape can be exemplified as a shape-retaining material. In this embodiment, the coolant material 60 is formed from metal fibers that are shape-retaining materials. Here, the metal fibers forming the coolant material 60 may include at least one of steel wool and copper wool. However, the above embodiments of the coolant material 60 are examples and are not limited to these.

[0052] The coolant material 60 is, for example, molded into a roughly disc shape and placed at the bottom of the bottom container 120.

[0053] The interruption device 1 according to this embodiment comprises a sliding structure consisting of a housing 10, an igniter 20 attached to the housing 10, and a projectile 40 that can slide within the housing 10, and is used as a device for cutting the conductive piece 50 by the sliding structure.

[0054] <Operation> Next, the operation of the circuit breaker 1 to interrupt the electrical circuit will be explained. As described above, Figure 1 shows the state of the circuit breaker 1 before operation (hereinafter also referred to as the "initial pre-operation state"). In this initial pre-operation state, the projectile 40 of the circuit breaker 1 is set in an initial position in which the piston portion 41 is positioned on the first end 11 side (upper end side) of the housing space 13, and the cut surface 420 formed at the lower end of the rod portion 42 is positioned on the upper surface of the cut portion 53 of the conductor piece 50.

[0055] Furthermore, the circuit breaker 1 according to this embodiment further includes an abnormality detection sensor (not shown) for detecting abnormal conditions in a device (vehicle, power generation equipment, energy storage equipment, etc.) to which the electrical circuit to be interrupted is connected, and a control unit (not shown) for controlling the operation of the igniter 20. The abnormality detection sensor may also detect abnormal conditions based on voltage or temperature of the conductor piece 50, in addition to the current flowing through the conductor piece 50. The abnormality detection sensor may also be, for example, an impact sensor, a temperature sensor, an acceleration sensor, a vibration sensor, etc., and may detect abnormal conditions such as accidents or fires based on impact, temperature, acceleration, or vibration in a device such as a vehicle. The control unit of the circuit breaker 1 is For example, it is a computer that can perform a predetermined function by executing a predetermined control program. The predetermined function performed by the control unit can also be realized by corresponding hardware. When an excessive current flows through the conductive piece 50 that forms part of the electrical circuit to which the circuit breaker 1 is applied, the abnormal current is detected by the abnormal detection sensor. The abnormal information regarding the detected abnormal current is passed from the abnormal detection sensor to the control unit. For example, based on the current value detected by the abnormal detection sensor, the control unit receives power from an external power supply (not shown) connected to the conductive pins of the igniter 20 and operates the igniter 20. Here, the abnormal current may be a current value that exceeds a predetermined threshold set for the protection of a predetermined electrical circuit. Note that the abnormal detection sensor and control unit described above do not have to be included as components of the circuit breaker 1, and may be included in a separate device, for example. Also, the abnormal detection sensor and control unit are not essential components of the circuit breaker 1.

[0056] For example, when an abnormal current in an electrical circuit is detected by an abnormal current detection sensor, the control unit of the circuit breaker 1 activates the igniter 20. That is, an operating current is supplied to the conductive pins of the igniter 20 from an external power source (not shown), causing the igniter in the ignition unit 21 to ignite and burn, generating combustion gas. Then, due to the pressure rise inside the ignition unit 21, the crack surface 21A cracks open, and the combustion gas of the igniter is released from inside the ignition unit 21 into the containment space 13.

[0057] Here, the ignition unit 21 of the igniter 20 is received in the recess 411 of the piston unit 41, and the splitting surface 21A of the ignition unit 21 is positioned opposite the pressure-receiving surface 411A of the recess 411 in the projectile 40. As a result, the combustion gas from the ignition unit 21 is released into the recess 411, and the pressure (combustion energy) of the combustion gas is transmitted to the upper surface of the piston unit 41, including the pressure-receiving surface 411A. Consequently, the projectile 40 moves downward in the containment space 13 along the extending direction (axial direction) of the containment space 13.

[0058] Figure 15 is a diagram illustrating the operation of the shut-off device 1 according to the embodiment. The upper part of Figure 15 shows the state of the shut-off device 1 during operation, and the lower part of Figure 15 shows the state of the shut-off device 1 after operation is complete. As described above, when the igniter 20 is activated, the projectile 40, which is subjected to the pressure (combustion energy) of the combustion gas of the igniter, is forcefully pushed downward, and as a result, the cutting surface 420 formed on the lower end side of the rod portion 42 shears and cuts through each boundary between the first connecting end 51 and the second connecting end 52 of the conductor piece 50 and the portion to be cut 53. As a result, the portion to be cut 53 is cut off from the conductor piece 50. The shape and dimensions of the projectile 40 can be freely determined as long as it can move smoothly along the extending direction (axial direction) of the housing space 13 when the igniter 20 is activated. For example, the outer diameter of the piston portion 41 of the projectile 40 may be set to the same dimension as the inner diameter of the large diameter cylinder portion 113 of the top holder 110.

[0059] Then, as shown in the lower part of Figure 15, the projectile 40 moves downward along the extending direction (axial direction) of the housing space 13 by a predetermined stroke until the lower end surface of the piston portion 41 contacts (collides with) the cushioning material 150 provided on the upper surface 101 of the housing body 100. The cushioning material 150 is positioned between the projectile 40 after sliding and the upper surface 101, preventing the projectile 40 from directly colliding with the upper surface 101. In this state, the cut portion 53 of the projectile 40, which has been cut off from the conductor piece 50 by the rod portion 42, is received within the arc extinguishing region R2 where the coolant material 60 is located. As a result, the first connecting end 51 and the second connecting end 52 located at both ends of the conductor piece 50 become electrically inoperable, and the predetermined electrical circuit to which the circuit breaker 1 is applied is forcibly shut off.

[0060] Next, with reference to Figure 16, the operation method of the electrical circuit breaker according to this embodiment will be described in detail. In step S101 of the operation method, the igniter 20 is activated. By activating it, energy is imparted to the projectile 40 to slide within the containment space 13. In the next step S102 following step S101, the conductive piece 50 is cut as a result of the sliding of the projectile 40. In step S102, the projectile 40 is slid with the cushioning material 150 provided on the upper surface 101 which defines the sliding end position of the projectile 40.

[0061] <Insulation resistance after operation> As described above, when the shut-off device 1 is activated, the projectile 40 cuts the first connecting end 51 at the first cutting edge 511 (Figure 2) and the second connecting end 52 at the second cutting edge 521. In addition, the first connecting end 51 and the second connecting end 52 are in contact with the housing body 100 and the rod portion 42 of the projectile 40, but since the housing body 100 and the rod portion 42 are insulators, after the shut-off device 1 is activated, the first connecting end 51 and the second connecting end 52 are in an insulated state.

[0062] However, the moment the portion to be cut 53 of the conductor piece 50 is severed, an arc discharge occurs between the separating portion to be cut 53 and the first and second connection ends 51 and 52, causing the conductor piece 50 to evaporate and adhere to the inner wall of the housing body 100 and the outer surface of the rod portion 42. As the degree of contamination increases due to the adhesion of the conductor piece 50 to the inner wall of the housing body 100 and the outer surface of the rod portion 42, even if the housing body 100 and the rod portion 42 themselves are insulators, current may flow along the inner wall of the housing body 100 and the outer surface of the rod portion 42, potentially reducing the insulation resistance between the first and second connection ends 51 and 52.

[0063] Therefore, the circuit breaker 1 of this embodiment is equipped with a coolant material 60 in the arc extinguishing region R2 that receives the cut portion 53 after cutting, and suppresses the decrease in insulation resistance value by quickly extinguishing the arc and suppressing the amount of evaporation of the conductor piece 50.

[0064] Furthermore, a small gap is provided between the inner wall of the housing body 100 and the outer surface of the rod portion 42 so that the projectile 40 can move within the housing space 13 of the housing body 100. The vaporized conductor fragments 50 enter this gap and adhere to it, which is one of the causes of the decrease in insulation resistance. For this reason, the circuit breaker 1 of this embodiment is equipped with grooves 131 and 141 on the inner wall of the housing body 100, and the creepage distance between the first connection end 51 and the second connection end 52 is increased to suppress the decrease in insulation resistance.

[0065] The projectile 40 and the housing body 100 are formed from insulating materials such as synthetic resin. Synthetic resin has lower tensile strength than metal and is prone to deformation and breakage. If no cushioning material is placed on the object that the projectile 40 collides with, there is a risk that the projectile 40 and the upper housing body 130 will crack due to the impact force of the collision. However, in the blocking device 1 according to this embodiment, a cushioning material 150 is provided. In this embodiment, the impact of the projectile 40 moving at high speed can be absorbed by the cushioning material 150, mitigating the impact force applied to the projectile 40 and the housing body 100, and suppressing cracking of the projectile 40 and the housing body 100. The blocking device 1 according to this embodiment can suppress the occurrence of cracks in the projectile 40 or the housing body 100 that the projectile 40 collides with.

[0066] Next, we investigated the optimal thickness of the cushioning material 150. Table 1 below shows the results of evaluating the insulating properties of samples of the circuit breaker 1, prepared with cushioning material 150 thicknesses set in 1.0 mm increments between 3.0 mm and 7.0 mm. The "S / N" column in Table 1 indicates the serial number of the sample. Three samples of sample 1 with a thickness of 3.0 mm were prepared and numbered 1-1 to 1-3. The same procedure was followed for samples No. 2 to 5, where three samples of the same cushioning material 150 thickness were prepared and their insulating properties were evaluated.

[0067] [Table 1]

[0068] The values ​​in the "Insulation Resistance (MΩ)" column of Table 1 represent the insulation resistance between the first connection end 51 and the second connection end 52 after disconnection. In the circuit breaker, sample 3, with a buffer material thickness of 5.0 mm, shows a relatively high insulation resistance, while samples 4 and 5, with buffer material thicknesses of 6.0 mm and 7.0 mm, show relatively low insulation resistance. In the "Insulation Performance" column of Table 1, "○" is indicated when the insulation resistance is relatively high, and "×" is indicated when the insulation resistance is relatively low. The values ​​in the "LV Value (V)" column of Table 1 represent the voltage applied between the first connection end 51, the second connection end 52, and the pair of conductive pins connected to the igniter 20 immediately after disconnection, and the LV value is the Low Voltage value. An LV value of less than 100 is preferable.

[0069] Considering the insulation resistance and LV values, the insulation resistance and LV values ​​were better for the circuit breaker of Sample No. 2, which had a buffer material thickness of 4.0 mm, and for the circuit breaker of Sample No. 3, which had a buffer material thickness of 5.0 mm. From these results, it was found that a buffer material thickness of 4.0 mm to 5.0 mm is preferable. The circuit breaker 1 with a buffer material thickness of 4.0 mm to 5.0 mm also exhibits good insulation properties.

[0070] <Embodiment 2> Next, a circuit breaker according to Embodiment 2 will be described. The circuit breaker according to this embodiment has the same configuration as Embodiment 1 described above, and is characterized in that the cushioning material 151 is sandwiched between the top holder 110 and the upper housing body 130.

[0071] Figure 17 is a diagram illustrating the internal structure of the blocking device 1 according to Embodiment 2. Figure 18 is a magnified view of the area around the buffer material 151 shown on the right side of the page in Figure 1. Figure 19 is a magnified view of the area around the buffer material 151, similar to Figure 18, showing the state after the projectile 40 has slid. Note that Figures 17 to 19 are substantially the same as Embodiment 1 described above. The same symbols are used for the components, and their explanations are omitted.

[0072] In this embodiment, vinyl methyl silicone rubber is used for the cushioning material 151, as in Embodiment 1 above. Two cushioning materials 151 are arranged symmetrically with respect to the center of the containment space 13 (cavity 135). The cushioning materials 151 prevent the projectile 40 from directly colliding with the upper surface 101 of the upper housing body 130.

[0073] As shown in Figures 17 and 18, the cushioning material 151 is fixed by having its fixing surface 151A sandwiched above and below in the axial direction, on the outer side of the housing body 100 in the axial direction from the contact point with the projectile 40. More specifically, the cushioning material 151 is sandwiched between the top holder 110 and the upper housing body 130 on the outer side of the housing body 100 in the axial direction from the contact point with the projectile 40, and the surface of the cushioning material 151 that contacts the top holder 110 or the upper housing body 130 is the fixing surface 151A. By sandwiching the outer fixing surface 151A of the cushioning material 151 between the top holder 110 and the upper housing body 130, the force that would cause the cushioning material 151 to deform when it receives an impact force from the projectile 40 can be absorbed by the fixing surface 151A that the cushioning material 151 is sandwiched above and below, thereby suppressing deformation of the cushioning material 151.

[0074] Furthermore, the impact force of the projectile 40 is applied to the cushioning material 151, causing the cushioning material 151 to deform. This force is applied to the fixed surface 151A of the cushioning material 151, increasing the degree of contact between the fixed surface 151A of the cushioning material 151 and the top holder 110, and between the fixed surface 151A of the cushioning material 151 and the upper housing body 130, thereby improving the sealing performance between the top holder 110 and the upper housing body 130. As a result, the shutoff device 1 can suppress the leakage of high-temperature gas from the arc discharge generated when the projectile 40 cuts the conductive piece 50 through the gap between the top holder 110 and the upper housing body 130.

[0075] Furthermore, in this embodiment, the flange portion 111 of the top holder 110 is formed in a stepped shape, with the upper surface 101 rising upward as it moves axially outward from the housing body 100. The flange portion 111 is formed in three steps so that the cushioning material 151, which is formed in two steps, fits into it. This allows the cushioning material 151 to be positioned to match the steps of the flange portion 111.

[0076] <Embodiment 3> Next, a circuit breaker according to Embodiment 3 will be described. Figure 20 is a cross-sectional view showing only the buffer material 152 used in the circuit breaker according to this embodiment. Figure 20 is a cross-sectional view showing the buffer material 152 located inside the circuit breaker when the circuit breaker 1 is cut along the axial direction as shown in Figure 1. Note that the circuit breaker 1 according to this embodiment has the same configuration as Embodiments 1 and 2 described above, except for the buffer material 152, so the same reference numerals are used for components that are substantially the same as those in Embodiments 1 and 2 described above, and their descriptions are omitted.

[0077] When the buffer material 152 is placed in the blocking device 1, it has a stepped shape when viewed from a direction perpendicular to the axial direction of the housing body 100. Specifically, it has a fixed surface 152A that is sandwiched between the top holder 110 and the upper housing body 130, a non-fixed surface 152B that is not fixed and receives the projectile 40, and a non-fixed surface 152C that is placed on the upper surface 101. The non-fixed surfaces 152B and 152C are formed to be thicker than the fixed surface 152A, and the overall shape has a step. By forming the buffer material 152 in a stepped shape in this way, the buffer material 152 can be aligned with the step of the upper housing body 130 during the manufacturing process of the blocking device 1, making it easy to align the buffer material 152.

[0078] Furthermore, the corners of the cushioning material 152 are chamfered. By chamfering at least the corners of the non-fixed surface 152B, which is the surface that is to come into contact with the projectile 40, the creepage distance between the first connection end 51 and the second connection end 52 can be increased by the amount of the chamfering, thereby suppressing a decrease in the insulation resistance value. The thickness of the cushioning material 152 is defined by the thickness between the non-fixed surfaces 152B and 152C, and this thickness is preferably 4.0 mm to 5.0 mm.

[0079] <Embodiment 4> Next, a circuit breaker according to Embodiment 4 will be described. Figure 21 is a cross-sectional view showing only the buffer material 153 used in the circuit breaker according to this embodiment. Figure 21 is a cross-sectional view showing the buffer material 153 arranged inside the circuit breaker when the circuit breaker 1 is cut along the axial direction as shown in Figure 1. Note that the circuit breaker 1 according to this embodiment has the same configuration as Embodiments 1 and 2 described above, except for the buffer material 153, so the same reference numerals are used for components that are substantially the same as those in Embodiments 1 and 2 described above, and their descriptions are omitted.

[0080] The cushioning material 153 has a shape in which its thickness changes when viewed from a direction perpendicular to the axial direction of the housing body 100 when it is placed in the blocking device 1. Specifically, it has a fixed surface 153A that is sandwiched between the top holder 110 and the upper housing body 130, a non-fixed surface 153B that is not fixed and receives the projectile 40, and a non-fixed surface 153C that is placed on the upper surface 101. The non-fixed surfaces 153B and 153C are formed to be thicker than the fixed surface 153A, and the shape narrows from the non-fixed surfaces 153B and 153C toward the fixed surface 153A. By forming the cushioning material 153 with a shape in which its thickness changes in this way, the cushioning material 153 can be aligned with the step in the upper housing body 130 during the manufacturing process of the blocking device 1, making it easy to align the cushioning material 153.

[0081] Furthermore, the cushioning material 153 has a groove 153D formed between the non-fixed surfaces 153B and 153C. The cushioning material 153 has a groove 153D that extends outward in a direction perpendicular to the axial direction of the housing body 100. In this way, by forming the groove 153D on the side of the cushioning material 153 that contacts the projectile 40, the creepage distance between the first connection end 51 and the second connection end 52 can be increased by the amount of the groove 153D, thereby suppressing a decrease in the insulation resistance value. The thickness of the cushioning material 153 is defined by the thickness between the non-fixed surfaces 153B and 153C, and this thickness is preferably 4.0 mm to 5.0 mm.

[0082] Furthermore, the blocking device 1 may be arranged by combining the cushioning material 152 in Embodiment 3 and the cushioning material 153 in Embodiment 4. For example, when viewed from above, the cushioning materials 152 and 153 have a semicircular annular shape. For example, when the upper housing body 130 is viewed from above as shown in Figure 4, the cushioning material 152 may be placed on the left side and the cushioning material 153 on the right side, or the cushioning material 152 may be placed on the right side and the cushioning material 153 on the left side. It is preferable to combine the two cushioning materials 152 and 153 so that the entire cushioning material surrounds the entire circumference of the housing space 13 and the rod portion 42 of the projectile 40.

[0083] <Embodiment 5> Next, a blocking device according to Embodiment 5 will be described. Figure 22 is a diagram illustrating the internal structure of the blocking device 1 according to this embodiment. In this embodiment, a buffer material 155 is placed in the piston portion 41 within the recessed portion of the rod portion of the projectile 40, and the buffer material 155 is placed on the arc extinguishing region R2 side of the conductor piece 50. On the arc extinguishing region R2 side, a coolant material 60 is formed in a shape into which the rod portion of the moved projectile 40 fits, and the position of the coolant material 60 facing the buffer material 155 extends toward the conductor piece 50 side, and the buffer material 155 is placed on the upper surface of that extending portion.

[0084] Figure 23 shows the state after the shutoff device 1 has been activated from the state shown in Figure 22. The conductive piece 50 has been cut off, and the annular cut-off portion 53 has fallen onto the coolant material 60. The projectile 40 slides until the cushioning materials 155 and 156 sandwich the conductive piece 50. The cushioning material 155 prevents the piston portion 41 of the projectile 40 from directly contacting the conductive piece 50, thereby preventing cracking of the piston portion 41. In addition, the cushioning material 156 can further mitigate the impact on the piston portion 41.

[0085] <Other Embodiments> While embodiments of the present disclosure have been described above, the various embodiments described can be combined as much as possible. For example, the sliding structure of the present disclosure can be used in a needleless syringe that ejects an injection target substance, such as a chemical solution, from its tip by sliding a piston using energy received from an igniter. The sliding structure of the present disclosure can also be used in perforators, pin pullers, pop-up hoods, and power bollards that create holes in objects by sliding a piston using energy received from an igniter. A power bollard is a device that is embedded in the road surface near a vehicle access gate and prevents vehicle traffic by causing a cylindrical structure to protrude from the road surface when activated.

[0086] Furthermore, cushioning materials 151 to 156 may be made of the same material as cushioning material 150, or they may be made with the same hardness (45 to 55 degrees) as cushioning material 150.

[0087] While embodiments of the electrical circuit breaker according to this disclosure have been described above, each embodiment disclosed herein can be combined with any other features disclosed herein. [Explanation of Symbols]

[0088] 1: Circuit breaker 10: Housing 13: Containment Space 20:Igniter 40: Projectile 42: Rod section 50: Conductor piece 53: Part to be excised 60: Coolant material 100: Housing body 130: Upper housing body 140: Lower housing body 150,151,152,153,154,155,156: Cushioning material

Claims

1. A housing containing a containment space extending in one direction, An igniter provided in the housing, A projectile is placed within the containment space, is launched from one end of the containment space by energy received from the igniter, and slides along the extending direction of the containment space. A buffer material is provided in the end-limiting section that defines the sliding end position of the projectile, A sliding structure comprising [a specific feature].

2. The termination restrictor is formed as part of the housing, The cushioning material is flexible and is placed between the projectile and the terminal restrictor after sliding. The sliding structure according to claim 1.

3. The aforementioned termination restrictor is provided in a portion of the housing that extends outward in the axial direction of the housing. The sliding structure according to claim 1 or 2.

4. The cushioning material is fixed by being sandwiched above and below in the axial direction, outside the axial direction of the housing, at a point where it contacts the projectile. The sliding structure according to claim 1 or 2.

5. The thickness of the cushioning material is 4.0 mm to 5.0 mm. The sliding structure according to claim 1 or 2.

6. When viewed from a direction perpendicular to the axial direction of the housing, the cushioning material has a stepped shape. The sliding structure according to claim 1 or 2.

7. The projectile has chamfered edges on the surfaces that are intended to come into contact with the buffer material. The sliding structure according to claim 1 or 2.

8. The cushioning material has chamfered edges on the surfaces that are intended to come into contact with the projectile. The sliding structure according to claim 1 or 2.

9. The cushioning material has grooves that extend outward in a direction perpendicular to the axial direction of the housing. The sliding structure according to claim 1 or 2.

10. The hardness of the cushioning material is 45 to 55 degrees. The sliding structure according to claim 1 or 2.

11. The cushioning material is made of silicone rubber. The sliding structure according to claim 1 or 2.

12. The sliding structure according to claim 1 or 2, A conductive piece provided in the housing and forming part of an electrical circuit, having a portion to be cut off by the projectile, and the conductive piece being arranged such that the portion to be cut off crosses the housing space, An electrical circuit breaker equipped with the following features.

13. Activating the igniter to impart energy to the projectile so that it slides within the housing, The projectile is slid with a buffer material provided at the end regulating part that defines the sliding end position of the projectile, A method for operating a sliding structure including [a specific component].

Images