Fusible link units and electrical junction boxes

Abstract

To provide a fusible link unit which can be miniaturized while providing a relief terminal in an electric junction box. [Solution] The fusible link unit 1 includes a conductor 40 having a fuse function and a housing 20 that houses the conductor 40. The conductor 40 has an input terminal portion 44 that can input power from a power source, an output terminal portion 42 that can output power, a fusing portion 43 that is disposed on the current path from the input terminal portion 44 to the output terminal portion 42, and a rescue terminal portion 45 that can connect to a rescue device 53 for supplying power from an external source to the power source. The input terminal portion 44 and the rescue terminal portion 45 are provided on a continuous exposed piece 41 of the conductor 40 that is exposed from the housing 20. The exposed piece 41 of the conductor 40 has a plate-like shape, and the rescue terminal portion 45 has a curved portion 46 where a portion of the peripheral edge of the exposed piece 41 is curved in the plate thickness direction.

Description

[Technical Field]

[0001] The present invention relates to a fusible link unit and an electrical junction box using the fusible link unit. [Background technology]

[0002] BACKGROUND ART Fusible link units have been proposed in which a bus bar having a fusing portion that melts at a predetermined current value is embedded in a resin housing (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent Publication No. 2021-166160 Summary of the Invention [Problem to be solved by the invention]

[0004] In some cases, such as when the charge level of a battery mounted on a vehicle such as an automobile becomes extremely low, power may be supplied to the battery from outside the vehicle (e.g., from another rescue vehicle). It is conceivable to provide a rescue terminal on the vehicle's electrical junction box for connecting a rescue device (e.g., a booster cable clip) used for such an external power supply. However, providing a dedicated bus bar or the like for use as a rescue terminal on the electrical junction box can hinder efforts to reduce the size of the electrical junction box. Furthermore, providing such a dedicated bus bar or the like in a desired position may be difficult depending on the amount of excess space available on the electrical junction box.

[0005] An object of the present invention is to provide a fusible link unit and an electrical junction box that can be made smaller while still providing a relief terminal in the electrical junction box. [Means for solving the problem]

[0006] In order to achieve the above-mentioned object, the fusible link unit and the electrical junction box according to the present invention have the following features.

[0007] A fusible link unit comprising: a conductor having a fuse function; and a housing for accommodating the conductor, The conductor is an input terminal section capable of receiving power from a power source, an output terminal section capable of outputting the power, a fusing section disposed on a current path from the input terminal section to the output terminal section, and a rescue terminal section capable of connecting a rescue tool for supplying power to the power source from an external device; The input terminal unit and the relief terminal unit are The conductive member is provided on a continuous exposed piece of the conductive material exposed from the housing. It must be a fusible link unit.

[0008] The above-mentioned fusible link unit; a case having an accommodation space for accommodating the fusible link unit, It must be an electrical junction box. [Effects of the Invention]

[0009] According to the fusible link unit and electrical junction box of the present invention, a portion of a conductor (e.g., a bus bar) having a fuse function is used as a rescue terminal portion to which a rescue device can be connected. In other words, the fusible link unit functions as a rescue terminal in addition to its original overcurrent interruption function. Therefore, there is no need to provide a dedicated bus bar or the like used as a rescue terminal portion in the electrical junction box. Therefore, the fusible link unit and electrical junction box of the present invention enable the electrical junction box to be made smaller while still providing a rescue terminal in the electrical junction box.

[0010] Another advantage is that in the fusible link unit and electrical junction box of the present invention, the relief terminal portion and the input terminal portion are commonly provided on a continuous exposed piece of the conductor exposed from the housing. Generally, the input terminal portion, which inputs power from a power source such as an on-board battery to the fusible link unit, is located on the periphery of the electrical junction box to facilitate the operation of connecting the power cable. Therefore, when the fusible link unit is attached to the electrical junction box, the relief terminal portion is also located on the periphery of the electrical junction box. This improves the user's operability when actually performing rescue operations compared to when the relief terminal portion is located in the center of the electrical junction box, for example.

[0011] The present invention has been briefly described above. The details of the present invention will become more apparent from the detailed description of the invention set forth below, taken in conjunction with the accompanying drawings. [Brief explanation of the drawings]

[0012] [Figure 1] FIG. 1 is a perspective view of a fusible link unit according to an embodiment of the present invention. [Figure 2] FIG. 2 is a side view of the fusible link unit shown in FIG. [Figure 3] FIG. 3 is a perspective view of the fusible link unit shown in FIG. 1 with the cover removed from the housing. [Figure 4] FIG. 4 is a plan view of a bus bar that constitutes the fuse element shown in FIG. [Figure 5] FIG. 5 is a perspective view of an electrical junction box accommodating the fusible link unit shown in FIG. [Figure 6] FIG. 6 is a plan view of the electrical junction box shown in FIG. [Figure 7] FIG. 7 is a perspective view showing a state in which a clip of a booster cable is connected to a relief terminal portion exposed to the outside in the electrical junction box shown in FIG. [Figure 8] FIG. 8 is an enlarged view showing a part of a fusible link unit according to another embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0013] <Embodiment> Hereinafter, a fusible link unit 1 according to an embodiment of the present invention will be described with reference to the drawings. The fusible link unit 1 electrically connects a battery (not shown) connected to an input terminal section 44 (see FIG. 1, etc.), external loads (not shown) connected to each output terminal section 42 (see FIG. 1), and a DC / DC converter (not shown) connected to another input terminal section 47, and has the function of cutting off the electrical connection between the battery and each external load and DC / DC converter when a current exceeding the rated current flows.

[0014] For ease of explanation, the following definitions are used for the "front-rear direction," "left-right direction," "up-down direction," "front," "rear," "left," "right," "up," and "down" as shown in Figure 1 and other figures. The "front-rear direction," "left-right direction," and "up-down direction" are perpendicular to one another. Note that these directions are defined merely for ease of explanation, and do not necessarily correspond to, for example, the front-rear direction, left-right direction, and up-down direction of an automobile or the like when the fusible link unit 1 is mounted in the automobile or the like.

[0015] 1 to 3, the fusible link unit 1 includes a fuse element 10, a housing 20, and a cover 30 attached to the housing 20. As can be seen from Fig. 2, the housing 20 and the cover 30 each have a shape that is plane-symmetrical with respect to a plane (plane of symmetry) that passes through the center in the front-rear direction and is perpendicular to the front-rear direction. Below, each of the components that make up the fusible link unit 1 will be explained in order.

[0016] First, the housing 20 will be described. The housing 20 is a resin molded body that is molded integrally (insert molded) with the fuse element 10 using a resin material so as to cover (embed) most of the fuse element 10. As can be seen from Figures 1 to 3 (particularly Figure 3), the housing 20 is roughly composed of a substantially rectangular parallelepiped housing main body 21 that extends in the left-right and up-down directions, and a substantially rectangular parallelepiped housing protrusion 22 that protrudes rightward from the upper right corner of the housing main body 21.

[0017] An approximately rectangular cover accommodating recess 23 for accommodating each of a pair of side wall portions 31 of the cover 30, which will be described later, is formed on each of the front and rear end surfaces of the housing main body portion 21 so as to be recessed in the thickness direction (front-to-back direction) of the housing main body portion 21.

[0018] A plurality of (four in this example) openings 24a are defined and formed in a left-right direction in a lower region of each of the substantially rectangular bottom surfaces of the pair of front and rear cover accommodating recesses 23 of the housing main body 21, and a single opening 24b is formed in the upper right end thereof. Each of the openings 24a and 24b is a rectangular hole that penetrates in the front-rear direction so as to connect the bottom surfaces of the pair of front and rear cover accommodating recesses 23. Hereinafter, when it is not necessary to distinguish between the openings 24a and 24b, each of the openings 24a and 24b may also be referred to as an "opening 24."

[0019] A locking projection 25 is formed at the center in the left-right direction of the upper end of each of the substantially rectangular bottom surfaces of the pair of front and rear cover accommodating recesses 23 of the housing main body 21. When the cover 30 is attached to the housing 20, the pair of front and rear locking projections 25 engage with a pair of front and rear locking holes 33 of the cover 30, which will be described later (see FIG. 1).

[0020] Next, a description will be given of the fuse element 10. As shown in Fig. 3, the fuse element 10 includes a bus bar 40 (a flat metal member), and a plurality of (four in this example) low-melting-point bodies 50 arranged in a plurality of (four in this example) fusing portions 43a and a single fusing portion 43b that are part of the bus bar 40.

[0021] 4, the bus bar 40 has a flat plate shape extending in the left-right and up-down directions, and in this example, the thickness (length in the front-to-back direction) of the bus bar 40 is constant over the entire area. Most of the bus bar 40 is embedded in the housing 20 (housing main body 21+housing protrusion 22) so as to include and extend along the symmetry plane of the housing 20 (see FIG. 3).

[0022] 3, the bus bar 40 includes, as portions exposed to the outside from the housing 20 (housing main body 21+housing protrusion 22), a connection portion 41, a plurality of (four in this example) output terminal portions 42, an input terminal portion 47, a plurality of (four in this example) fusing portions 43a, and a single fusing portion 43b. Hereinafter, when there is no need to distinguish between the fusing portion 43a and the fusing portion 43b, each of the fusing portion 43a and the fusing portion 43b may be referred to as a "fusing portion 43."

[0023] The connection portion 41 is a generally rectangular, flat portion that protrudes leftward from the left end surface of the housing main body 21 of the housing 20 and extends vertically. A lower region of the connection portion 41 functions as an input terminal portion 44, and an upper region of the connection portion 41 (particularly, the portion that protrudes upward from the upper end of the housing 20) functions as a relief terminal portion 45. The relief terminal portion 45 has a shape that points upward and away from the housing 20. A battery terminal (not shown) that connects to a battery post of the vehicle battery is connected to the input terminal portion 44. A clip 53 (see FIG. 7) of a booster cable is connected to the relief terminal portion 45. A curved portion 46 that curves upward in the thickness direction (more specifically, toward the front) and extends horizontally is formed at the upper edge of the relief terminal portion 45, extending horizontally. 7 , the provision of curved portion 46 in relief terminal portion 45 facilitates the operation of clamping the upper edge of relief terminal portion 45 with a pair of clamping portions 54 of clip 53 of the booster cable and connecting clip 53 to relief terminal portion 45. In this manner, input terminal portion 44 and relief terminal portion 45 are provided in common on one continuous plate-like connecting portion 41, which is a part of bus bar 40 exposed from housing 20.

[0024] The multiple (four) output terminal portions 42 protrude downward from the lower end surface of the housing main body 21 of the housing 20 and are arranged side by side in the left-right direction corresponding to the multiple openings 24a. Each output terminal portion 42 is to be connected to a terminal (not shown) provided at the end of an electric wire extending from a corresponding external load.

[0025] The input terminal portion 47 protrudes downward from the lower end surface of the housing protrusion 22 of the housing 20, and is disposed in correspondence with the single opening 24b. A terminal (not shown) provided at the end of an electric wire extending from the DC / DC converter is to be connected to the input terminal portion 47.

[0026] Each of the multiple (four) fusing portions 43a is located inside a corresponding opening 24a. Each fusing portion 43a is exposed to both the front and rear sides through the front and rear openings of the corresponding opening 24a, making it visible from both the front and rear sides. Similarly, a single fusing portion 43b is located inside a single opening 24b. The fusing portion 43b is exposed to both the front and rear sides through the front and rear openings of the opening 24b, making it visible from both the front and rear sides. A low-melting-point body 50 is placed on one of the front and rear surfaces of each fusing portion 43 (the front side in this example). The melting point of the material constituting the low-melting-point body 50 (e.g., an alloy mainly composed of tin (Sn)) is lower than the melting point of the material constituting the busbar 40 (fusing portion 43) (e.g., an alloy mainly composed of copper (Cu)).

[0027] As shown in FIG. 4, in the busbar 40, the connection portion 41 (input terminal portion 44+relief terminal portion 45) is connected to each of the plurality of output terminal portions 42 via one or both of the fusing portion 43a and the fusing portion 43b. In other words, the battery and various external loads are electrically connected via one or both of the fusing portion 43a and the fusing portion 43b. Similarly, the input terminal portion 47 is connected to each of the plurality of output terminal portions 42 via one or both of the fusing portion 43a and the fusing portion 43b. In other words, the DC / DC converter and various external loads are electrically connected via one or both of the fusing portion 43a and the fusing portion 43b.

[0028] Busbar 40 is designed so that, when a current exceeding the rated current flows, fusing portion 43 is blown off using Joule heat. When fusing portion 43 blows off, the electrical connection between output terminal portion 42 connected to blown fusing portion 43 and connection portion 41 (input terminal portion 44+relief terminal portion 45) is severed.

[0029] The fusing principle of each fusing portion 43 is as follows. When a current exceeding the rated current flows through the fusing portion 43, heat (Joule heat) generated in the fusing portion 43 causes the temperature of the fusing portion 43 to reach the melting point of the low-melting-point body 50, causing the low-melting-point body 50 to melt before the fusing portion 43. When the molten (liquid phase) low-melting-point body 50 comes into contact with the fusing portion 43, the metal material constituting the fusing portion 43 diffuses into the low-melting-point body 50, even if the fusing portion 43 itself has not yet reached its melting point. This diffusion gradually corrodes the fusing portion 43, causing it to be cut (melted). According to the fusing principle described above, the fusing portion 43 will be melted when the temperature of the fusing portion 43 at the location where the low-melting-point body 50 is placed reaches the melting point of the low-melting-point body 50 (even if it has not yet reached the melting point of the fusing portion 43). This allows the fuse element 10 to be blown at a more practical temperature (the melting point of the low-melting-point body 50).

[0030] Next, the cover 30 will be described. The cover 30 is a molded body made of a transparent resin material. When attached to the housing 20, the cover 30 functions to cover and protect the periphery of the fusing portion 43 of the fuse element 10 so that the fusing portion 43 can be seen from outside the fusible link unit 1 (see FIG. 1).

[0031] 3, the cover 30 is made up of a pair of substantially rectangular, flat side wall portions 31 that extend in the up-down and left-right directions and face each other in the front-rear direction, and a connecting portion 32 that connects the upper ends of the pair of front and rear side wall portions 31, and has a substantially U-shape that opens downward when viewed in the left-right direction. A pair of front and rear locking holes 33 are formed in the left-right central portions of the upper ends of the pair of front and rear side wall portions 31, corresponding to the pair of front and rear locking protrusions 25 of the housing 20. The components that make up the fusible link unit 1 have been described above.

[0032] The cover 30 having the above configuration is attached to the housing main body 21 of the housing 20. To attach the cover 30 to the housing main body 21 of the housing 20, as shown in Fig. 3, the cover 30 is placed on the upper side of the housing main body 21, and the cover 30 is slid downward relative to the housing main body 21 so that the pair of front and rear side wall portions 31 are respectively received in the pair of front and rear cover receiving recesses 23 of the housing main body 21, covering the multiple (five) openings 24 from both the front and rear. This sliding continues until the pair of locking holes 33 of the cover 30 engage with the pair of locking protrusions 25 of the housing main body 21.

[0033] When the pair of locking holes 33 engage with the pair of locking projections 25, attachment of the cover 30 to the housing main body 21 of the housing 20 is complete (see FIG. 1). When the cover 30 is completely attached to the housing 20, the plurality of (five) openings 24 of the housing 20 are covered from both the front and back sides by the pair of side wall portions 31. As a result, the plurality of fusing portions 43 are covered and protected by the cover 30 at positions separated from the fusing portions 43 so that they can be seen from outside the fusible link unit 1. The engagement of the pair of locking holes 33 with the pair of locking projections 25 prevents the cover 30 from moving upward relative to the housing 20 (i.e., the cover 30 from falling off).

[0034] 5 and 6, the fusible link unit 1 with the cover 30 completely attached to the housing 20 is inserted from above into and accommodated in accommodation spaces 51, 52 provided inside a substantially rectangular parallelepiped case 2 that is the enclosure of an electrical junction box 3 (e.g., a fuse box). The accommodation space 51 is a hole that penetrates in the vertical direction and extends in the horizontal direction, and accommodates a portion of the fusible link unit 1 excluding the connection portion 41 that protrudes leftward from the housing 20 (specifically, the entire housing 20 and a plurality (five) of output terminal portions 42 that extend downward from the housing 20). The accommodation space 52 is a recess (depression) located on the left-hand peripheral edge of the case 2 and that opens upward and forward, and accommodates an input terminal portion 44 that is a part of the connection portion 41 that protrudes leftward from the housing 20. A relief terminal portion 45 (including a curved portion 46), which is a part of the connection portion 41, protrudes outside the accommodation space 52 (above the upper end of the case 2) (see FIGS. 5 and 7). This makes it easier to connect the clip 53 of the booster cable to the relief terminal portion 45.

[0035] In this manner, in the electrical junction box 3 in which the fusible link unit 1 is housed in the case 2, a portion of the bus bar 40 is used as a relief terminal 45 to which the clip 53 of the booster cable can be connected. Therefore, there is no need to provide a dedicated bus bar or the like separately as a relief terminal, as in the past. Furthermore, the input terminal 44, which inputs power from the battery to the fusible link unit 1, is located on the left peripheral edge of the electrical junction box 3. This improves the workability of connecting the input terminal 44 to the power cable extending from the battery. Furthermore, because the input terminal 44 is located on the left peripheral edge of the electrical junction box 3, the relief terminal 45, which is provided in common with the input terminal 44 on the plate-shaped connection portion 41, which is part of the bus bar 40, is also located on the left peripheral edge of the electrical junction box 3. This improves the user's workability compared to when the relief terminal 45 is located in the center of the electrical junction box 3, for example. Furthermore, the relief terminal portion 45 has a shape that moves away from the housing 20 in the opposite direction (upward) to the direction (downward) in which the output terminal portion 42 projects from the housing 20. This allows the relief terminal portion 45 to easily project outward (upward) from the housing space 52 of the electrical junction box 3 when the fusible link unit 1 is fitted into the housing spaces 51, 52 of the electrical junction box 3.

[0036] <Actions and Effects> As described above, according to the fusible link unit 1 of this embodiment, a portion of the bus bar 40 having a fuse function is used as the relief terminal portion 45 to which a relief device (a booster cable clip 53) can be connected. Therefore, when the fusible link unit 1 is attached to the electrical junction box 3, there is no need to separately provide a dedicated bus bar or the like used as a relief terminal portion, as in the past. Furthermore, the relief terminal portion 45 and the input terminal portion 44 are commonly provided on a continuous exposed piece (connection portion 41) of the bus bar 40 exposed from the housing 20. The input terminal portion 44, which inputs power from a power source to the fusible link unit 1, is located on the periphery of the electrical junction box 3 to facilitate the connection to the power cable. Therefore, when the fusible link unit 1 is attached to the electrical junction box 3, the relief terminal portion 45 is also located on the periphery of the electrical junction box 3, which improves the user's operability compared to when the relief terminal portion 45 is located, for example, in the center of the electrical junction box 3. In this way, the fusible link unit 1 according to this embodiment allows the electrical connection box 3 to be made smaller.

[0037] Furthermore, according to the fusible link unit 1 of this embodiment, the relief terminal portion 45 has a curved portion 46 in which part of the peripheral edge of the exposed piece (connection portion 41) of the bus bar 40 is curved so as to rise in the plate thickness direction. This makes it easier to connect a relief tool (clip 53 of the booster cable) to the relief terminal portion 45.

[0038] Furthermore, in the fusible link unit 1 according to this embodiment, the relief terminal portion 45 has a shape that moves away from the housing 20 in the opposite direction (upward) to the direction in which the output terminal portion 42 projects (downward). This allows the relief terminal portion 45 to project out of the storage space 52 of the electrical junction box 3 when the fusible link unit 1 is fitted into the storage spaces 51 and 52 of the electrical junction box 3. This improves the user's workability.

[0039] Furthermore, according to the electrical junction box 3 of this embodiment, the relief terminal portion 45, which is a part of the bus bar 40, is arranged to protrude outside the accommodation space 52 of the case 2. This improves the user's workability.

[0040] <Other aspects> It should be noted that the present invention is not limited to the above-described embodiments, and various modifications can be adopted within the scope of the present invention. For example, the present invention is not limited to the above-described embodiments, and modifications, improvements, etc. are possible as appropriate. Furthermore, the material, shape, dimensions, number, location, etc. of each component in the above-described embodiments are arbitrary as long as they can achieve the present invention, and are not limited thereto.

[0041] For example, in the above embodiment, the upper region of the exposed piece (connection portion 41) of the bus bar 40 is used as the relief terminal portion 45. Here, as shown in FIG. 8 , one or more recesses 48 (so-called serrations) may be provided in the upper region of the connection portion 41 near the curved portion 46. By providing such recesses 48, the user can easily visually recognize the relief terminal portion 45 and the clip 53 of the booster cable can be firmly fixed to the relief terminal portion 45. Note that the recesses 48 also serve to indicate that the relief terminal portion 45 is provided at a position different from the normal current path from the input terminal portion 44 to the output terminal portion 42.

[0042] Here, the features of the embodiments of the fusible link unit 1 and the electric junction box 3 according to the present invention described above will be briefly summarized and listed below in [1] to [5].

[0043] [1] A fusible link unit (1) comprising a conductor (40) having a fuse function and a housing (20) for accommodating the conductor (40), The conductor (40) is The power supply device has an input terminal section (44) capable of receiving power from a power source, an output terminal section (42) capable of outputting the power, a fusing section (43) disposed on a current path from the input terminal section (44) to the output terminal section (42), and a rescue terminal section (45) capable of connecting a rescue tool (53) for supplying power to the power source from an external device, The input terminal portion (44) and the relief terminal portion (45) are The conductive member (40) is provided on a continuous exposed piece (41) exposed from the housing (20). Fusible link unit (1).

[0044] According to the fusible link unit having the configuration [1] above, a part of the conductor (e.g., a bus bar) having a fuse function is used as a rescue terminal portion to which a rescue device can be connected. In other words, the fusible link unit functions as a rescue terminal in addition to its original overcurrent interruption function. Therefore, there is no need to provide a dedicated bus bar or the like used as a rescue terminal portion in the electrical connection box. Therefore, the fusible link unit of the present invention makes it possible to reduce the size of the electrical connection box while providing a rescue terminal in the electrical connection box.

[0045] Another advantage of the fusible link unit of this configuration is that the relief terminal and the input terminal are commonly provided on a continuous exposed piece of conductor exposed from the housing. Generally, the input terminal, which inputs power from a power source such as an on-board battery to the fusible link unit, is located on the periphery of the electrical junction box to facilitate the work of connecting the power cable. Therefore, when the fusible link unit is attached to the electrical junction box, the relief terminal is also located on the periphery of the electrical junction box. This improves the user's workability when actually performing rescue work compared to when the relief terminal is located in the center of the electrical junction box, for example.

[0046] [2] In the fusible link unit (1) described in [1] above, The exposed piece (41) of the conductor (40) has a plate-like shape, The relief terminal portion (45) is A curved portion (46) is formed so that a part of the peripheral edge of the exposed piece (41) rises in the thickness direction. Fusible link unit (1).

[0047] In the fusible link unit having the configuration [2] above, the relief terminal portion has a curved portion in which part of the peripheral edge of the exposed piece of the conductor is curved so as to rise in the thickness direction, which makes it easier to connect a relief tool (e.g., a clip for a booster cable) to the relief terminal portion.

[0048] [3] The fusible link unit (1) described in [1] above, The output terminal portion (42) is It has a shape that protrudes from the housing (20) in a predetermined direction, The relief terminal portion (45) is The housing (20) has a shape that moves away from the housing (20) in a direction opposite to the predetermined direction. Fusible link unit (1).

[0049] In the fusible link unit having the configuration [3] above, the relief terminal portion has a shape that moves away from the housing in the opposite direction to the direction in which the output terminal portion protrudes. This allows the relief terminal portion to protrude outside the housing space of the electrical junction box, for example, when the fusible link unit is fitted into the housing space of the electrical junction box. This improves the user's workability when performing relief work.

[0050] [4] A fusible link unit (1) according to any one of the above [1] to [3], and a case (2) having accommodation spaces (51, 52) for accommodating the fusible link unit (1). Electrical junction box (3).

[0051] According to the electrical junction box having the configuration [4] above, a part of the conductor (e.g., bus bar) having the fuse function of the fusible link unit is used as a relief terminal portion to which a rescue device can be connected. In other words, the fusible link unit functions as a rescue terminal in addition to its original overcurrent interruption function. Therefore, there is no need to provide the electrical junction box with a dedicated bus bar or the like used as a rescue terminal portion. Therefore, the fusible link unit of the present invention makes it possible to reduce the size of the electrical junction box while providing the electrical junction box with a rescue terminal.

[0052] Another advantage of the electrical junction box of this configuration is that the relief terminal and input terminal of the fusible link unit are commonly provided on a continuous exposed piece of conductor exposed from the housing. Generally, the input terminal, which inputs power from a power source such as an on-board battery to the fusible link unit, is located on the periphery of the electrical junction box to facilitate the work of connecting the power cable. Therefore, when the fusible link unit is attached to the electrical junction box, the relief terminal is also located on the periphery of the electrical junction box. This improves the user's workability when actually performing rescue work compared to when the relief terminal is located in the center of the electrical junction box.

[0053] [5] In the electrical connection box (3) described in [4] above, The fusible link unit (1) is The electrical conductor (40) is disposed so that at least a part of the relief terminal portion (45) protrudes outside the receiving space (52). Electrical junction box (3).

[0054] According to the electrical junction box having the configuration [5] above, the relief terminal portion of the conductor is arranged to protrude outside the housing space of the case, thereby improving the workability of the user when carrying out relief work. [Explanation of symbols]

[0055] 1 Fusible link unit 2 cases 3 Electrical junction box 20. Housing 40 Bus bar (conductor) 41 Connection part (exposed piece) 42 Output terminal section 43 Fused part 44 Input terminal section 45 Relief terminal section 46 Curved section 51 Containment Space 52 Containment Space 53 Booster cable clip (rescue equipment)

Claims

1. A fusible link unit comprising: a conductor having a fuse function; and a housing for accommodating the conductor, The conductor is an input terminal section capable of receiving power from a power source, an output terminal section capable of outputting the power, a fusing section disposed on a current path from the input terminal section to the output terminal section, and a rescue terminal section capable of connecting a rescue tool for supplying power to the power source from an external device; The input terminal unit and the relief terminal unit are The conductive member is provided on a continuous exposed piece of the conductive material exposed from the housing. Fusible link unit.

2. 2. The fusible link unit according to claim 1, the exposed piece of the conductor has a plate-like shape, The relief terminal portion is A part of the peripheral edge of the exposed piece has a curved portion that is curved so as to rise in the plate thickness direction. Fusible link unit.

3. 2. The fusible link unit according to claim 1, The output terminal unit is The housing has a shape that protrudes in a predetermined direction. The relief terminal portion is a shape that moves away from the housing in a direction opposite to the predetermined direction; Fusible link unit.

4. A fusible link unit according to any one of claims 1 to 3; a case having an accommodation space for accommodating the fusible link unit, Electrical junction box.

5. The electrical junction box according to claim 4, The fusible link unit includes: The relief terminal portion of the conductor is disposed so as to protrude at least partially outside the accommodating space. Electrical junction box.

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