Fuse unit

Abstract

A fuse unit (1) is provided with: a bus bar (3) which is a conductor and in which a section to be cut (3b) is set; a housing (2) that supports two points that sandwich the portion to be cut; a cut-off part (4) that is disposed as an insulator in a first space (6) that is formed on one side of the bus bar as an internal space of the housing; and a reconnection section (5) that is disposed as a conductor in a second space (7) that is an internal space of the housing and that is formed on the opposite side of the bus bar from the first space, the cutting section having a tip section (4c) that cuts the bus bar into a first portion (14) and a second portion (15) at the section to be cut, and the first portion (14) and the second portion (15) being separated from each other by the tip section (4c). And a reconnecting portion (5b) that is movable into the second space, the reconnecting portion having a first connecting portion (5b) that is in contact with the first portion and a second connecting portion (5c) that is in contact with the second portion.

Description

Technical Field

[0001] The present invention relates to the technical field of fuse units. Background Art

[0002] There is known a fuse unit that cuts off an electrical connection in order to ensure safety when an abnormality occurs or the like.

[0003] For example, in a vehicle having a high-voltage on-board battery, a fuse unit is used to stop the power supply from the on-board battery when an accident occurs.

[0004] Patent Document 1 listed below discloses a structure in which a fusible portion of a fusible portion unit is melted to cut off a circuit, thereby protecting various electrical components and circuits.

[0005] Prior art literature

[0006] Patent Literature

[0007] Patent Document 1: Japanese Patent Application Publication No. 2022-45414 Summary of the invention

[0008] Technical issues

[0009] However, after the electrical connection is released by the fuse unit, it is sometimes desired to temporarily restore the electrical connection. For example, in a fuse unit mounted on a vehicle, when an accident occurs, the fuse unit works to cut off the power supply from the vehicle battery to ensure the safety of the passengers.

[0010] However, sometimes it is dangerous to leave the accident vehicle directly at the accident scene, and sometimes it is preferable to move the accident vehicle to a safe place before the tow truck arrives.

[0011] In this case, it is desirable to temporarily restore the electrical connection disconnected by the fuse unit.

[0012] The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide a fuse unit capable of releasing and restoring an electrical connection with a simple structure.

[0013] Technical Solution

[0014] A fuse unit in one embodiment of the present invention comprises: a busbar, which serves as a conductor and is provided with a cut-off portion; a shell, which supports and clamps two points of the cut-off portion; a cut-off portion, which is arranged in a first space and serves as an insulator, the first space being an internal space of the shell and formed on one side of the busbar; and a reconnection portion, which is arranged in a second space and serves as a conductor, the second space being an internal space of the shell and formed on the side of the busbar opposite to the first space, the cut-off portion having a front end portion that cuts the busbar into a first part and a second part at the cut-off portion and is capable of moving into the second space, and the reconnection portion having a first connection portion in contact with the first part and a second connection portion in contact with the second part.

[0015] Thus, after the bus bar is cut by the cutting portion to cut off the electrical connection between the first portion and the second portion, the electrical connection between the first portion and the second portion is reestablished by the reconnecting portion.

[0016] Effects of the Invention

[0017] According to the fuse unit of the present invention, the electrical connection can be released and restored with a simple structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic cross-sectional view showing a configuration example of a fuse unit according to an embodiment of the present invention.

[0019] Figure 2 It is a simplified perspective view showing an enlarged cutting tip portion of a fuse unit and a bus bar.

[0020] Figure 3 1 is a schematic diagram showing a state where a bus bar is divided into a first portion and a second portion.

[0021] Figure 4 This is a schematic cross-sectional view showing an example of a cut-off state of the fuse unit.

[0022] Figure 5 It is a schematic cross-sectional view showing another example of the cut-off state of the fuse unit, and is a view showing a state in which both the front end portions of the first portion and the second portion are in contact with the insulating portion.

[0023] Figure 6 This is a schematic cross-sectional view showing an example of a reconnection state of the fuse unit.

[0024] Figure 7 This is a schematic cross-sectional view showing an example of a fuse unit according to a first modification.

[0025] Figure 8This is a schematic cross-sectional view showing an example of a normal state of the fuse unit according to the second modification.

[0026] Fig. 9 This is a schematic cross-sectional view showing an example of a reconnection state of the fuse unit according to the second modification.

[0027] Fig.10 This is a schematic cross-sectional view showing a part of an example of a fuse unit according to a third modification.

[0028] Explanation of symbols

[0029] 1, 1A, 1B, 1C fuse units

[0030] 2.2B shell

[0031] 2b Movement restriction part

[0032] 3. 3B busbar

[0033] 3b Thin wall part (cut part)

[0034] 4. 4C cutting section

[0035] 4c Cut off the front end

[0036] 5.5B reconnection part

[0037] 5b First connection part

[0038] 5c Second connection part

[0039] 5e recess

[0040] 6First Space

[0041] 7 Second Space

[0042] 10 Spring components

[0043] 11 Insulation

[0044] 14 Part 1

[0045] 15 Part 2

[0046] 16 First Restriction

[0047] 17 Second Restriction DETAILED DESCRIPTION

[0048] Hereinafter, a mode for implementing the fuse unit 1 of the present invention will be described with reference to the drawings.

[0049] <1. Structure of fuse unit>

[0050] The structure of the fuse unit 1 of the present invention is as follows: Figure 1 shown.

[0051] The fuse unit 1 is used to protect various parts arranged downstream and / or reduce the impact on human life by cutting off the electrical connection upstream closer to the power source.

[0052] For example, in an example of application to a vehicle, it is considered that the fuse unit 1 is provided near a vehicle-mounted battery or near an ECU (Electronic Control Unit) or the like to be protected.

[0053] The fuse unit 1 includes a housing 2 having a space formed therein, a bus bar 3 formed of an electrical conductor, a cutoff portion 4 for cutting the bus bar 3 , and a reconnection portion 5 for restoring electrical connection after the bus bar 3 is cut.

[0054] The housing 2 is formed of an insulator, and a busbar 3 is arranged substantially near the center of the internal space of the housing 2. The housing 2 has a first space 6 formed on one side of the busbar 3 and a second space 7 formed on the opposite side of the first space 6 with respect to the busbar 3.

[0055] In the following description, the direction in which the first space 6 and the second space 7 are arranged is described as the up-down direction D1. In addition, a plane perpendicular to the up-down direction D1 is described as a horizontal plane.

[0056] However, the horizontal plane described does not necessarily need to be perpendicular to the gravity direction when the fuse unit 1 is actually installed.

[0057] Furthermore, the direction in which the busbar 3 extends inside the fuse unit 1 is described as the left-right direction D2 , and the direction orthogonal to the up-down direction D1 and the left-right direction D2 is described as the front-back direction D3 .

[0058] Of course, the left-right direction D2 and the front-back direction D3 described are for convenience of description, and the installation direction when implementing the fuse unit 1 is not limited to these directions.

[0059] The first space 6 and the second space 7 may be cylindrical spaces, cubic spaces, or spaces other than the above shapes. In the following description, it is taken as an example that the first space 6 and the second space 7 are both cylindrical spaces.

[0060] The cutting portion 4 is disposed in the first space 6. The cutting portion 4 includes a large diameter portion 4a having substantially the same size as the cross section of the first space 6, a small diameter portion 4b being a portion continuing downward from the large diameter portion 4a, and a cutting tip portion 4c protruding downward from the center of the small diameter portion 4b.

[0061] like Figure 2As shown, the cutting front end portion 4c is formed in the shape of a triangular prism whose axial direction is the front-rear direction D3, and the width in the left-right direction D2 decreases as it goes downward.

[0062] The housing 2 has a support protrusion 2 a formed in the vicinity of substantially the center in the up-down direction D1 of the inner peripheral surface of the first space 6 .

[0063] A plurality of supporting protrusions 2a may be provided separately in the circumferential direction of the inner surface of the first space 6, or may be provided continuously in the circumferential direction in an annular shape.

[0064] Since the support protrusion 2 a supports the step at the boundary between the large diameter portion 4 a and the small diameter portion 4 b from below, the cut portion 4 is maintained in a state of being located in the middle of the first space 6 in the up-down direction D1 .

[0065] The first space 6 is separated into an upper space and a lower space when the cut-off portion 4 is arranged. A mechanism for pressing the cut-off portion 4 downward in an emergency is arranged in the upper space. In this example, the ignition wire 8 and the gunpowder 9 arranged at its front end are arranged in the upper space of the cut-off portion 4.

[0066] The reconnecting portion 5 is disposed in the second space 7. The reconnecting portion 5 is formed as a conductor and includes a cylindrical base portion 5a having a size substantially the same as the cross section of the second space 7, a first connecting portion 5b protruding upward from one end of the base portion 5a in the left-right direction D2, and a second connecting portion 5c protruding upward from the other end of the base portion 5a in the left-right direction D2.

[0067] The vertical cross section of the reconnecting portion 5 is substantially U-shaped.

[0068] The second space 7 is separated into an upper space and a lower space in a state where the reconnecting portion 5 is arranged, and a spring member 10 for biasing the reconnecting portion 5 upward is arranged in the lower space. The spring member 10 is, for example, a compression coil spring.

[0069] In the reconnecting portion 5 , the boundary portion between the base portion 5 a and the first connecting portion 5 b and the boundary portion between the base portion 5 a and the second connecting portion 5 c are provided as flange portions 5 d protruding outward.

[0070] The housing 2 has a movement restricting portion 2 b formed inwardly convexly at the substantially center of the inner peripheral surface of the second space 7 in the up-down direction D1.

[0071] The reconnecting portion 5 disposed in the second space 7 is restricted from further upward movement by the engagement of the flange portion 5 d with the movement restricting portion 2 b .

[0072] The inner surface of the first connection part 5b of the reconnecting part 5, the inner surface of the second connection part 5c, and a portion between the first connection part 5b and the second connection part 5c as the upper surface of the base part 5a form a recessed portion 5e.

[0073] An insulating portion 11 formed of an insulator is mounted on the surface of the recessed portion 5e.

[0074] A mechanism for pushing up the reconnecting part 5 is arranged in the lower space of the second space 7. In this example, the ignition wire 12 and the explosive 13 arranged at the front end thereof are arranged in the lower space of the reconnecting part 5.

[0075] The busbar 3 includes a thick wall portion 3a partially located outside the shell 2, a thin wall portion 3b located in the center of the shell 2 in the left-right direction D2 and directly below the cutting front end portion 4c of the cutting portion 4, and a connecting portion 3c connecting the thick wall portion 3a and the thin wall portion 3b.

[0076] The thin-walled portion 3b is provided as a cut portion that divides the busbar 3 into the first portion 14 and the second portion 15 when the cut portion 4 falls and collides (see Figure 3 ).

[0077] The housing 2 is formed with a first restricting portion 16 so as to protrude inward, and the first restricting portion 16 restricts the first portion 14 of the bus bar 3 from moving upward in the first space 6 .

[0078] Furthermore, the housing 2 is formed with a second restricting portion 17 so as to protrude inwardly, and the second restricting portion 17 restricts the second portion 15 of the bus bar 3 from moving upward in the first space 6 .

[0079] It should be noted that the first restricting portion 16 and the second restricting portion 17 may be integrally formed as a flange that protrudes inward in the first space 6 and is continuous in the circumferential direction.

[0080] <2. Various states of fuse unit>

[0081] Fuse unit 1 except Figure 1 In addition to the normal state shown, a disconnection state in which a part of the bus bar 3 is cut off to disconnect the electrical connection in an emergency, and a reconnection state in which the disconnected electrical connection in the bus bar 3 is restored can be adopted.

[0082] An example of the cut-off state of the fuse unit 1 is as follows Figure 4 shown.

[0083] When energy is applied to the gunpowder 9 via the ignition wire 8, the gunpowder 9 explodes. As a result, a strong downward force is instantly applied to the cutting portion 4, the large diameter portion 4a passes over the supporting protrusion 2a, and the cutting tip 4c pierces the thin wall portion 3b of the busbar 3, breaking the busbar 3.

[0084] It should be explained, such as Figure 5 As shown, when the busbar 3 is broken, the front end portion of the first portion 14 and the front end portion of the second portion 15 may hang down and contact the reconnecting portion 5 .

[0085] Even in such a case, by attaching the insulating portion 11 to the surface of the recessed portion 5 e of the reconnecting portion 5 , it is possible to maintain the electrical disconnection state between the first portion 14 and the second portion 15 .

[0086] Then, in Figure 6 An example of a reconnection state of the fuse unit 1 is shown.

[0087] When energy is applied to the gunpowder 13 via the ignition wire 12, the gunpowder 13 explodes. As a result, a strong upward force acts on the reconnecting portion 5, the flange portion 5d passes over the movement restricting portion 2b, the first connecting portion 5b is pressed toward the first portion 14, and the second connecting portion 5c is pressed toward the second portion 15.

[0088] At this time, as shown in the drawings, by providing the first restricting portion 16 on the housing 2, the upward movement of the first portion 14 is restricted, and the contact area between the first connecting portion 5b and the first portion 14 is increased.

[0089] Similarly, by providing the second restricting portion 17 on the housing 2 , the second portion 15 is restricted from moving upward, and the contact area between the second connecting portion 5 c and the second portion 15 is increased.

[0090] This suppresses the increase in contact resistance between the first connection portion 5b and the first part 14 and the increase in contact resistance between the second connection portion 5c and the second part 15, thereby ensuring a good current-carrying state between the first part 14 and the second part 15 of the bus bar 3.

[0091] It should be explained, such as Figure 6 As shown, the length of the reconnecting portion 5 in the vertical direction D1 may be set so that the lower surface of the reconnecting portion 5 can be supported by the movement restricting portion 2b when the first connecting portion 5b and the second connecting portion 5c are pressed against the first portion 14 and the second portion 15 respectively.

[0092] This makes it easy to maintain the state in which the first connection portion 5b and the second connection portion 5c are strongly pressed against the first portion 14 and the second portion 15, respectively.

[0093] <3. Modifications>

[0094] A first example of a modification Figure 7 shown.

[0095] In the fuse unit 1A of this example, the insulating portion 11 is not provided in the recessed portion 5 e of the reconnecting portion 5 .

[0096] The reconnecting portion 5 in this modification is Figure 5 As shown in FIG. 1 , the front ends of the first and second parts 14 and 15 are broken and hang downward (at Figure 7 It is arranged below the busbar 3 at a distance, and is not reached by the busbar 3.

[0097] Thus, in the cut-off state of the fuse unit 1A, the first portion 14 and the second portion 15 are prevented from being electrically connected via the reconnection portion 5 .

[0098] Furthermore, by not providing the insulating portion 11 , the number of components can be reduced.

[0099] The second example of the modification Figure 8 shown.

[0100] The shape of the case 2B of the fuse unit 1B in the present modification example, the shape of the bus bar 3B, and the shape of the reconnection portion 5B are different from those of the above-described example.

[0101] First, the bus bar 3B includes the thick portion 3 a , the thin portion 3 b , and the connecting portion 3 c , but the portions arranged in the first space 6 and the second space 7 are substantially the thin portion 3 b .

[0102] The reconnection portion 5B arranged in the second space 7 below the busbar 3B includes a cylindrical base 5f, a first connection portion 5b protruding upward from near one end of the base 5f in the left-right direction D2 and having a conical front end, and a second connection portion 5c protruding upward from near the other end of the base 5f in the left-right direction D2 and having a conical front end.

[0103] The upper portion of the base portion 5f is formed as a protruding engagement portion 5g that protrudes at least in the left-right direction D2.

[0104] The protruding engagement portion 5g is located above the movement restriction portion 2b of the housing 2B, thereby restricting the downward movement of the reconnecting portion 5B (for example, movement due to gravity).

[0105] It should be noted that the reconnecting portion 5B is different from the other examples described above in that it is not biased upward by the spring member 10 or the like.

[0106] Further, a second movement restricting portion 2c for restricting upward movement of the reconnecting portion 5B is formed slightly above a portion of the inner peripheral surface of the second space 7 of the housing 2B that contacts the protruding engagement portion 5g.

[0107] That is, the reconnecting portion 5B is held in a state where the protruding engagement portion 5g is sandwiched between the movement restricting portion 2b and the second movement restricting portion 2c, and movement in the up-down direction D1 is restricted.

[0108] Note that the housing 2B is not provided with the first restricting portion 16 for restricting the upward movement of the first portion 14 of the bus bar 3B and the second restricting portion 17 for restricting the upward movement of the second portion 15 of the bus bar 3B.

[0109] Fig. 9 The reconnection state of the fuse unit 1B according to the present modification is shown.

[0110] As shown in the figure, if the gunpowder 13 explodes through the ignition wire 12 and the reconnecting part 5B moves upward with a strong force, the first connecting part 5b of the reconnecting part 5B penetrates the first part 14 of the broken busbar 3B, and the second connecting part 5c of the reconnecting part 5B penetrates the second part 15.

[0111] Since the front end portions of the first portion 14 and the second portion 15 are formed into a conical shape, the first connecting portion 5 b and the second connecting portion 5 c can easily penetrate the first portion 14 and the second portion 15 .

[0112] It should be noted that barbs may be provided in the first connection portion 5 b and the second connection portion 5 c so as to facilitate maintaining the state of penetrating the first portion 14 and the second portion 15 .

[0113] Furthermore, in order to facilitate the first connection portion 5 b and the second connection portion 5 c to penetrate the first portion 14 and the second portion 15 , respectively, restricting portions that restrict the upward movement of the first portion 14 and the second portion 15 may be provided, respectively.

[0114] The restricting portion is preferably provided so as not to interfere with the front end portions of the first connecting portion 5b and the second connecting portion 5c in the penetrating state.

[0115] Furthermore, in order to prevent the first connection part 5b and the second connection part 5c from interfering with the cutting part 4 dropped from above, an escape hole for escaping the tip of the first connection part 5b that has penetrated the first portion 14 may be formed in the cutting part 4.

[0116] Similarly, a relief hole for escaping the front end of the second connecting portion 5 c that has penetrated the second part 15 may be provided in the cut portion 4 .

[0117] Furthermore, in order to prevent the cutter 4 from excessively moving downward, specifically, to prevent the cutter 4 from moving downward to such an extent that it cuts the bus bar 3 and hinders the reconnector 5 from moving upward, a restriction portion may be provided on the inner peripheral surface of the first space 6 of the housing 2B.

[0118] According to the present modification, the first restricting portion 16 and the second restricting portion 17 , the spring member 10 , and the like are not provided in the housing 2B, thereby achieving weight reduction of the fuse unit 1B.

[0119] The third example of the modification Fig.10 shown.

[0120] A fuse unit 1C according to the present modification example has a different shape of a cutoff portion 4C from that of the above-described example.

[0121] Specifically, the cutting portion 4C does not have the large diameter portion 4a and the small diameter portion 4b, but includes a cylindrical portion 4d, a protruding portion 4e protruding outward substantially at the center of the cylindrical portion 4d in the up-down direction D1, and a cutting tip portion 4c.

[0122] By not providing the large diameter portion 4a having substantially the same diameter as the first space 6, during the transition from the normal state to the cut state, after the protrusion 4e passes over the support protrusion 2a and is located below, the friction resistance between the cut portion 4 and the housing 2 is minimized.

[0123] Therefore, the busbar 3 can be cut by passing through the cutting tip portion 4 c of the cutting portion 4 with a smaller amount of explosive 9 .

[0124] The same structure can also be applied to the reconnecting portion 5 .

[0125] It should be noted that, in the above-mentioned examples, the spring member 10 as a compression spring is used below the reconnecting portion 5, but a spring member as a tension spring may be provided above the reconnecting portion 5. In this case, the movement restricting portion 2b of the housing 2 may be provided at a position and in a shape that restricts the upward movement of the reconnecting portion 5.

[0126] <4. Summary>

[0127] As described in the above examples, the fuse unit 1 (1A, 1B, 1C) of the present invention comprises: a bus bar 3 (3B) which serves as a conductor and is provided with a cut portion (thin-walled portion 3b); a housing 2 (2B) which supports two points for clamping the cut portion; a cut portion 4 (4C) which is arranged in a first space 6 and serves as an insulator, the first space 6 being an internal space of the housing 2 (2B) and formed on one side of the bus bar 3 (3B); and a reconnection portion 5 (5B) which is arranged in a second space 7 and serves as a conductor, the second space 7 being an internal space of the housing 2 (2B) and formed on the side of the bus bar 3 (3B) opposite to the first space 6.

[0128] The cutting portion 4 ( 4C) has a cutting tip portion 4 c that cuts the bus bar 3 ( 3B) into the first portion 14 and the second portion 15 at the cut portion and is movable into the second space 7 .

[0129] Furthermore, the reconnecting portion 5 ( 5B) has a first connecting portion 5 b in contact with the first portion 14 and a second connecting portion 5 c in contact with the second portion 15 .

[0130] Thus, after the bus bar 3 ( 3B) is cut by the cutting portion 4 ( 4C) to cut the electrical connection between the first portion 14 and the second portion 15 , the electrical connection between the first portion 14 and the second portion 15 is reestablished by the reconnecting portion 5 ( 5B).

[0131] For example, by applying the fuse unit 1 (1A, 1B, 1C) of the present invention to a vehicle, after the bus 3 (3B) is cut off to avoid secondary damage caused by leakage when an accident occurs, the electrical connection of the bus 3 (3B) is restored, thereby enabling the vehicle to be moved to ensure the safety of the accident scene.

[0132] In addition, in extremely low temperatures, it is considered to stop heating the interior of the accident vehicle while waiting for rescue, but by restoring the electrical connection of bus 3 (3B), the air in the vehicle can be conditioned using the power of the on-board battery, which can increase the possibility of survival of the passengers.

[0133] The reconnection portion 5 (5B) of the fuse unit 1 (1B, 1C) of the present invention can also be set to form a protruding U-shape with the first connection portion 5b and the second connection portion 5c toward the busbar 3 (3B), and the insulating portion 11 can be set in the U-shaped recess 5e in the reconnection portion 5 (5B).

[0134] Thus, even if both front end portions of the first portion 14 and the second portion 15 of the broken busbar 3 (3B) are in contact with the reconnection portion 5 (5B), the portion where the front end portions are in contact also becomes the insulating portion 11. Therefore, it is possible to prevent the electrical connection between the first portion 14 and the second portion 15 from being accidentally restored, thereby improving safety.

[0135] Furthermore, by providing the insulating portion 11 in the recessed portion 5e and not providing it in the front end portions of the first connecting portion 5b and the second connecting portion 5c, it is possible to prevent the restoration of the electrical connection between the first portion 14 and the second portion 15 from being hindered.

[0136] The housing 2 in the fuse unit 1 ( 1A, 1C) of the present invention may include a first restricting portion 16 that restricts movement of the first portion 14 toward the first space 6 , and a second restricting portion 17 that restricts movement of the second portion 15 toward the first space 6 .

[0137] Thus, when the first connection portion 5b and the second connection portion 5c are pressed against the first portion 14 and the second portion 15, respectively, the first portion 14 and the second portion 15 are restricted from moving toward the first space 6, thereby ensuring a good connection state.

[0138] Therefore, the electrical connection between the first portion 14 and the second portion 15 can be restored appropriately.

[0139] In addition, the contact area between the first portion 14 and the first connection portion 5b and the contact area between the second portion 15 and the second connection portion 5c can be increased, and an increase in contact resistance can be suppressed, thereby reducing power consumption.

[0140] The fuse unit 1 (1A, 1C) of the present invention may include a spring member 10 for urging the reconnecting portion 5 toward the bus bar 3, and the housing 2 may include a movement limiting portion 2b for limiting movement of the reconnecting portion 5 toward the bus bar 3.

[0141] Thus, only by releasing the restriction of the movement restricting portion 2b, the first connecting portion 5b and the second connecting portion 5c in the reconnecting portion 5 are pressed against the first portion 14 and the second portion 15, respectively, thereby restoring the electrical connection between the first portion 14 and the second portion 15.

[0142] Therefore, it is not necessary to drive a motor or the like for bringing the first connection portion 5 b and the second connection portion 5 c into contact with the first portion 14 and the second portion 15 at the time of reconnection.

[0143] The movement limiting portion 2b may be configured in various ways. For example, the movement limiting portion 2b may be configured to change the state of protruding from the inner wall of the housing 2 and the state of being accommodated. In this case, the gunpowder 13 may not be arranged below the reconnecting portion 5, which can contribute to the improvement of safety.

[0144] The spring member 10 in the fuse unit 1 (1A, 1C) of the present invention can also urge the reconnecting portion 5 toward the bus bar 3 (3B) when the first connecting portion 5b is in contact with the first portion 14 and the second connecting portion 5c is in contact with the second portion 15.

[0145] Thus, after reconnection, the state in which the first connection portion 5b is pressed against the first portion 14 and the second connection portion 5c is pressed against the second portion 15 continues.

[0146] Therefore, the electrical connection between the reconnected first portion 14 and the second portion 15 can be continuously ensured.

[0147] The above-mentioned embodiments and modifications can be combined as appropriate.

Claims

1. A fuse unit, characterized in that: have: A bus bar, which is a conductor and is provided with a cut portion; A housing that supports two points that clamp the cut portion; a cut-off portion, which is disposed in a first space and serves as an insulator, wherein the first space serves as an inner space of the housing and is formed on one side of the busbar; as well as a reconnecting portion, which is arranged in a second space and serves as a conductor, wherein the second space serves as an internal space of the housing and is formed on a side of the bus bar opposite to the first space, The cutting portion has a front end portion, which cuts the busbar into a first portion and a second portion at the cut portion and is movable into the second space. The reconnecting portion has a first connecting portion in contact with the first portion and a second connecting portion in contact with the second portion.

2. The fuse unit according to claim 1, characterized in that The reconnecting portion is formed in a U-shape in which the first connecting portion and the second connecting portion are protruded toward the bus bar. The U-shaped recessed portion in the reconnecting portion is provided with an insulating portion.

3. The fuse unit according to claim 1, characterized in that The housing includes a first restricting portion that restricts movement of the first portion toward the first space, and a second restricting portion that restricts movement of the second portion toward the first space.

4. The fuse unit according to claim 1, characterized in that The fuse unit includes a spring member that urges the reconnection portion toward the bus bar. The housing includes a movement restriction portion that restricts movement of the reconnection portion in a direction approaching the bus bar.

5. The fuse unit according to claim 4, characterized in that The spring member urges the reconnecting portion in a direction approaching the bus bar in a state in which the first connecting portion is in contact with the first portion and the second connecting portion is in contact with the second portion.

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