Electrical Junction Box

Abstract

To provide a miniaturized electric connection box.SOLUTION: A bolt block 31 includes a resin block 311 and a bolt 312 whose shaft unit 312b protrudes from the resin block 311. A resin frame 4 houses the bolt block 31. A first bus bar 34 is attached to the bolt block 31 and electrically connected to the bolt 312. A second bus bar 35 is arranged on an opposite side to a projecting direction of the bolt 312 relative to the frame 4, and a terminal fitting 100 attached to an end of an electric wire L is fastened together by a screw Sc and a nut 322. A nut block 32 has a nut 322 and a resin block 321 to which the nut 322 is fixed and the second bus bar 35 is attached. A third bus bar 36 and a fusible body 38 mounted on the third bus bar 36 are connected between the first bus bar 34 and the second bus bar 35.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to an electrical junction box. [Background technology]

[0002] A wide variety of electronic devices are mounted on automobiles. In order to supply power and transmit signals to these electronic devices, the automobile is equipped with an electrical junction box. A known electrical junction box has a configuration including a bus bar connected to electronic components such as a relay and a fuse, a bolt block for fixing an external terminal connected to an end of a power cable, and a frame for accommodating the bus bar and the bolt block (see Patent Document 1).

[0003] Furthermore, when the power supply supplied from the bolt block is to be connected to another electric wire, the other electric wire needs to be connected to the bus bar connected to the bolt block via a fuse, which requires a connection part for connecting to the other electric wire to be provided on the bus bar housed in the frame, which causes a problem of an increase in the size of the frame. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2013-255347 A Summary of the Invention [Problem to be solved by the invention]

[0005] The present invention has been made in consideration of the above-mentioned circumstances, and an object of the present invention is to provide an electrical junction box that is miniaturized. [Means for solving the problem]

[0006] In order to achieve the above-mentioned object, the electrical junction box according to the present invention has the following features [1] to [7]. [1] a bolt block including a first resin block and a bolt having a shaft portion protruding from the first resin block; A resin frame that houses the bolt block; a first bus bar attached to the bolt block and electrically connected to the bolt; a second bus bar disposed on an opposite side of the frame from a protruding direction of the bolt, the second bus bar having a connection portion for connection to a terminal metal fitting attached to an end of an electric wire; A fusing portion connected between the first bus bar and the second bus bar. It is an electrical junction box. [2] In the electrical junction box according to [1], the fusing portion is composed of a third bus bar connected between the first bus bar and the second bus bar, and a fusible element provided on the third bus bar. It is an electrical junction box. [3] In the electrical junction box according to [1], the fusing portion is composed of a chip fuse, The chip fuse is screwed between the first bus bar and the second bus bar. It is an electrical junction box. [4] In the electrical connection box according to any one of [1] to [3], The fusing portion is disposed on the opposite side of the frame from the protruding direction. It is an electrical junction box. [5] In the electrical connection box according to any one of [1] to [4], The second bus bar is provided long in a direction intersecting the protruding direction, A plurality of the terminal fittings are arranged in a line along a longitudinal direction of the second bus bar so as to be connectable to each other. It is an electrical junction box. [6] In the electrical connection box according to any one of [1] to [5], the connection portion of the second bus bar is formed of a screw insertion hole through which a screw passes, the second bus bar is fastened together with the terminal metal fitting by the screw and the nut, and a mounting block including a second resin block to which the screw or the nut is fixed and to which the second bus bar is attached. It is an electrical junction box. [7] In the electrical junction box according to [6], The first resin block and the second resin block are integrally provided by being connected to each other by a connecting block. It is an electrical junction box.

[0007] According to the electrical junction box having the configuration of [1] above, the fusing portion is connected between the first bus bar attached to the bolt block and the second bus bar disposed on the opposite side of the frame in the protruding direction. This allows the second bus bar, which is connected to the terminal fitting attached to the end of the electric wire, to be disposed in the dead space on the opposite side of the frame in the protruding direction, thereby enabling miniaturization. According to the electrical connection box of the configuration [2] above, by configuring the fusing portion from the third bus bar and the fusible element, the third bus bar can be configured integrally with either the first bus bar or the second bus bar, thereby reducing the number of parts and making assembly easier. According to the electrical junction box having the above-mentioned configuration [3], the fusing portion is formed of a chip fuse, which makes it possible to prevent overcurrent with high precision. According to the electrical connection box of the configuration [4] above, there is no need to house the fusion part inside the frame, which allows for further miniaturization. Moreover, the fusion part is visible, allowing the user to visually confirm that the fusion part is connected. According to the electrical connection box having the configuration [5] above, by providing the second bus bar with a long length in a direction intersecting the protruding direction, it is possible to achieve a compact size in the protruding direction even when multiple electric wires are connected. According to the electrical junction box having the configuration [6] above, the second bus bar and the terminal fitting can be fastened together. According to the electrical junction box having the configuration [7] above, the first resin block and the second resin block are integrally provided by the connecting block, thereby reducing the number of parts and facilitating assembly. Effect of the Invention

[0008] According to the present invention, it is possible to provide a compact electrical junction box.

[0009] The present invention has been briefly described above. Furthermore, the details of the present invention will be further clarified by reading the following description of the embodiment of the present invention (hereinafter, referred to as "embodiment") with reference to the accompanying drawings. [Brief description of the drawings]

[0010] [Figure 1] FIG. 1 is a perspective view of an electric junction box according to a first embodiment of the present invention. [Diagram 2] FIG. 2 is an exploded perspective view of the electrical junction box shown in FIG. [Diagram 3] FIG. 3 is an exploded perspective view of the block assembly shown in FIG. [Figure 4] FIG. 4 is a perspective view of an electric junction box according to the second embodiment of the present invention. [Diagram 5] FIG. 5 is an exploded perspective view of the electrical junction box shown in FIG. [Figure 6] FIG. 6 is an exploded perspective view of the block assembly shown in FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] Specific embodiments of the present invention will be described below with reference to the drawings. For ease of explanation, the following terms are defined as "front-rear direction", "left-right direction", "up-down direction", "front", "rear", "left", "right", "up" and "down" as shown in Fig. 1. The "front-rear direction", "left-right direction" and "up-down direction" are mutually orthogonal.

[0012] (First embodiment) First, an electrical junction box 1A of a first embodiment will be described with reference to Fig. 1 to Fig. 3. As shown in the figures, the electrical junction box 1A includes a bus bar 2, a block assembly 3, and a resin frame 4 that houses the bus bar 2 and a bolt block 31 of the block assembly 3. The bus bar 2 is a wiring member obtained by subjecting a metal plate to press processing or the like. The block assembly 3 will be described later.

[0013] The frame 4 is made of synthetic resin. The frame 4 is provided with an accommodation portion 41 capable of accommodating a bolt block 31 described below, and a plurality of cavities 42 for accommodating terminals of electronic components such as relays, fuses, and fusible links. The accommodation portion 41 is formed in a cylindrical shape and is open at the top and bottom. The terminal portion of the busbar 2 is accommodated in the cavity 42, and when the electronic component is accommodated in the cavity 42, the electronic component is connected to the busbar 2.

[0014] As shown in FIG. 3 and other figures, the block assembly 3 includes a bolt block 31, a nut block (mounting block) 32, a connection block 33 connecting the bolt block 31 and the nut block 32, first to fourth bus bars 34 to 37, a fusible element 38, and a cover 39 (see FIG. 1 and FIG. 2, omitted from FIG. 3). The bolt block 31 includes a resin block 311 (first resin block) formed of synthetic resin in a cube shape, and a bolt 312 having a head 312a and a shaft 312b. The resin block 311 is formed in a cube shape having approximately equal lengths in the up-down, left-right, and front-rear directions. The head 312a of the bolt 312 is fixed to the resin block 311, and the shaft 312b protrudes upward (in the protruding direction) from the resin block 311.

[0015] The nut block 32 is disposed below the frame 4 (opposite the protruding direction of the bolt 312). The nut block 32 has a resin block 321 (second resin block) formed in a cubic shape from synthetic resin, and a plurality of nuts 322 fixed to the resin block 321. The resin block 321 is formed in a cubic shape that is long in the left-right direction, and three nuts 322 are fixed to the rear side surface in a line along the left-right direction.

[0016] The connecting block 33 is made of synthetic resin, and connects the front end of the lower surface of the resin block 311 of the bolt block 31 to the front end and right end of the upper surface of the resin block 321 of the nut block 32. The resin block 311 of the bolt block 31, the resin block 321 of the nut block 32, and the connecting block 33 are integrally formed of synthetic resin, and are formed into a substantially L-shape when viewed from the front side.

[0017] In this embodiment, the resin block 311 of the bolt block 31 and the resin block 321 of the nut block 32 have approximately the same length in the front-rear direction. The connecting block 33 is shorter in length in the front-rear direction than the resin blocks 311 and 321. This allows the connecting block 33 to form a recess 301 recessed toward the front side. As shown in FIG. 1, the bolt block 31 is housed in a frame 4, and the nut block 32 and the connecting block 33 protrude downward from the frame 4.

[0018] The first bus bar 34 is attached to the bolt block 31 and electrically connected to the bolt 312. As shown in FIG. 3 and other figures, the first bus bar 34 has a first plate portion 341 positioned on the upper surface of the resin block 311 and a second plate portion 342 hanging down from the rear end of the first plate portion 341. The first plate portion 341 is provided with a bolt insertion hole 343 through which the shaft portion 312b of the bolt 312 is inserted. The bolt insertion hole 343 is provided from the center to the left end of the first plate portion 341. The first plate portion 341 is fastened together with an external terminal (not shown) provided at the end of a power line connected to a power source by the bolt 312 and a nut (not shown). The second plate portion 342 is inserted into a groove 313 provided on the rear side of the resin block 311. The groove 313 is provided long in the left-right direction and penetrates in the up-down direction.

[0019] The second bus bar 35 is disposed below the frame 4, and is attached to the rear surface of the nut block 32 with the terminal fittings 100 attached to the ends of the electric wires L fastened together by the screws Sc and nuts 322. The second bus bar 35 is made of a rectangular metal plate that is long in the left-right direction, and has three screw insertion holes 351 for passing the screws Sc provided along the left-right direction. The three screw insertion holes 351 are provided opposite the three nuts 322 fixed to the nut block 32 in the front-rear direction.

[0020] The two screw insertion holes 351 on the left side are provided for connecting the terminal fittings 100 attached to the ends of the electric wires L. More specifically, the terminal fittings 100 are placed on the rear side of the second bus bar 35, and the screws Sc are passed through screw insertion holes (not shown) in the terminal fittings 100 and the screw insertion holes 351 in the second bus bar 35, and then screwed into the nuts 322 provided in the nut block 32. This allows the second bus bar 35 and the terminal fittings 100 to be attached to the rear side surface of the nut block 32 in a state in which they are fastened together and connected. The rightmost screw insertion hole 351 is provided for connecting the fourth bus bar 37, which will be described later.

[0021] Next, before describing the third bus bar 36, the fourth bus bar 37 will be described. The fourth bus bar 37 is provided with the same width as the first bus bar 34 in the left-right direction, and has a screw insertion hole 371 for passing a screw Sc in the center. The fourth bus bar 37 is overlapped on the front side of the second bus bar 35, and the screw Sc is passed through the rightmost screw insertion hole 351 of the second bus bar 35 and the screw insertion hole 351 of the fourth bus bar 37, and then screwed into the nut 322 fixed to the nut block 32. In this way, the second bus bar 35 and the fourth bus bar 37 can be attached to the rear side surface of the nut block 32 in a state in which they are connected by being fastened together.

[0022] Next, the third bus bar 36 will be described. The third bus bar 36 is connected between the first bus bar 34 and the fourth bus bar 37 connected to the second bus bar 35. That is, the third bus bar 36 is connected between the first bus bar 34 and the second bus bar 35. The third bus bar 36 connects between the lower end of the second plate portion 342 of the first bus bar 34 and the upper end of the fourth bus bar 37. The third bus bar 36 has a length in the left-right direction shorter than the first and fourth bus bars 34 and 37, and is bent in a stepped shape. A fusible element 38 is mounted at the center in the up-down direction of the third bus bar 36. According to the above configuration, when an overcurrent flows through the third bus bar 36, the fusible element 38 melts and melts the third bus bar 36, and the third bus bar 36 and the fusible element 38 form a melting portion, which can cut off the overcurrent. Furthermore, the connecting block 33 is disposed on the back surface of the third bus bar .

[0023] In this embodiment, the second plate portion 342 of the first bus bar 34, the third bus bar 36, and the fourth bus bar 37 are provided on the same plane. Also, in this embodiment, the first bus bar 34, the third bus bar 36, and the fourth bus bar 37 are integrally provided by pressing a single metal sheet.

[0024] The cover 39 is formed in a U-shape in cross section so as to cover both the left and right sides and the rear side of the third bus bar 36 .

[0025] Next, the procedure for assembling the above-mentioned electric connection box 1A will be described. First, the block assembly 3 is assembled. First, the first bus bar 34, the third bus bar 36, and the fourth bus bar 37, which are integrally formed, are moved from top to bottom and inserted into the groove 313 from the upper opening of the groove 313 provided in the resin block 311. At this time, the fourth bus bar 37 and the third bus bar 36 are inserted into the groove 313 in this order and come out from the lower opening of the groove 313. When the first plate portion 341 of the first bus bar 34 is positioned on the upper surface of the resin block 311, the second plate portion 342 is inserted into the groove 313. In addition, the third bus bar 36 is positioned on the rear side of the connection block 33, and the screw insertion hole 371 of the fourth bus bar 37 faces the rightmost nut 322 fixed to the nut block 32.

[0026] Thereafter, the second bus bar 35 is placed on the rear surfaces of the nut block 32 and the fourth bus bar 37. At this time, the rightmost screw insertion hole 351 provided in the second bus bar 35 and the screw insertion hole 371 provided in the fourth bus bar 37 overlap, and the leftmost and middle screw insertion holes 351 provided in the second bus bar 35 face the leftmost and middle nuts 322 fixed to the nut block 32.

[0027] Next, the screw Sc is passed through the rightmost screw insertion hole 351 of the second bus bar 35 and the screw insertion hole 371 of the fourth bus bar 37, and is screwed into the rightmost nut 322 fixed to the nut block 32. This makes it possible to attach the first to fourth bus bars 34 to 37 to the bolt block 31 and the nut block 32, and to electrically connect the first to fourth bus bars 34 to 37. Thereafter, the cover 39 is attached to the recess 301. Furthermore, the screw Sc is passed through a screw insertion hole (not shown) provided in the terminal fitting 100 of the electric wire L and the screw insertion hole 351 of the second bus bar 35, and is screwed into the nut 322 fixed to the nut block 32, to complete the block assembly 3.

[0028] The block assembly 3 assembled as described above is inserted into the frame 4 from below as shown in Fig. 2 to complete the electrical junction box 1A. At this time, the bolt block 31 is accommodated in the accommodation portion 41 of the frame 4, and the connection block 33 and the nut block 32 protrude from below the frame 4.

[0029] According to the embodiment described above, the third bus bar 36 having the fusible element 38 mounted thereon is connected between the first bus bar 34 attached to the bolt block 31 and the second bus bar 35 disposed below the frame 4. This allows the second bus bar 35 connected to the terminal fitting 100 to be disposed in the dead space below the frame 4, thereby enabling the electrical junction box 1A to be made smaller in size.

[0030] Furthermore, according to the above-described embodiment, by constructing the fusion portion from the third bus bar 36 and the fusible element 38, the third bus bar 36 can be constructed integrally with the first bus bar 34, thereby reducing the number of parts and facilitating assembly.

[0031] Also, according to the embodiment described above, the third bus bar 36, which is the fusible part, and the fusible element 38 are disposed below the frame 4. This eliminates the need to accommodate the fusible element 38 within the frame 4, and allows the electrical junction box 1A to be further miniaturized. Moreover, the third bus bar 36 and the fusible element 38 are visible, and it is possible to visually confirm that the third bus bar 36 and the fusible element 38 are connected to each other.

[0032] Furthermore, according to the embodiment described above, by providing the second bus bar 35 with a long length in the left-right direction intersecting the up-down direction, the electrical connection box 1A can be made smaller in the up-down direction even when multiple electric wires L are connected.

[0033] Furthermore, according to the embodiment described above, the resin blocks 311 and 321 are integrally provided by the connecting block 33, thereby reducing the number of parts and facilitating assembly.

[0034] Second embodiment Next, an electric junction box 1B of a second embodiment will be described with reference to Figures 4 to 6. In the electric junction box 1B shown in Figures 4 to 6, parts equivalent to those of the electric junction box 1A shown in Figures 1 to 3 already described in the first embodiment are given the same reference numerals and detailed description thereof will be omitted. As shown in the figures, the electric junction box 1B includes a bus bar 2, a block assembly 3B, and a resin frame 4 that houses the bus bar 2 and the bolt block 31B of the block assembly 3B.

[0035] The bus bar 2 and the frame 4 are similar to those in the first embodiment, and therefore a detailed description thereof will be omitted here.

[0036] As shown in FIG. 3 and other figures, the block assembly 3B includes a bolt block 31B, a nut block 32B, a connecting block 33B connecting the bolt block 31B and the nut block 32B, first and second bus bars 34B and 35, and a fuse 302. The bolt block 31B includes a resin block 311B (first resin block) formed of synthetic resin in a cube shape, and a bolt 312 having a head 312a and a shaft 312b. The resin block 311B is formed in a cube shape with approximately equal lengths in the left-right direction and the front-rear direction and a short length in the up-down direction. The bolt 312 has a head 312a fixed to the resin block 311B and a shaft 312b protruding from the upper surface of the resin block 311B.

[0037] The nut block 32B is disposed below the frame 4. The nut block 32B has a resin block 321B (second resin block) formed in a cubic shape from synthetic resin, and a plurality of nuts 322 fixed to the resin block 321B. The resin block 321B is formed in a cubic shape that is long in the left-right direction, and three nuts 322 are fixed to the rear side surface in a line along the left-right direction.

[0038] The connecting block 33B has a resin block 331B formed of synthetic resin in a cube shape, and a nut 332B fixed to the resin block 331B. The resin block 331B connects the front end of the lower surface of the resin block 311B of the bolt block 31B to the right end of the upper surface of the resin block 321B of the nut block 32B. The resin block 311B of the bolt block 31B, the resin block 321B of the nut block 32B, and the resin block 331B of the connecting block 33B are integrally formed of synthetic resin and are formed in a substantially L-shape when viewed from the front side.

[0039] Nut 332B is fixed to the upper side of resin block 331B. Nut 332B fixed to connection block 33B and the rightmost nut 322 fixed to nut block 32B are arranged next to each other in the vertical direction.

[0040] In this embodiment, the resin block 321B of the nut block 32B and the resin block 331B of the connection block 33B have approximately the same length in the front-rear direction. The resin block 311B of the bolt block 31B is longer in the front-rear direction than the nut block 32B and the connection block 33B. This causes the bolt block 31B to protrude rearward from the nut block 32B and the connection block 33B. As shown in FIG. 4, the upper parts of the bolt block 31B and the connection block 33B are accommodated in the frame 4, and the lower parts of the nut block 32B and the connection block 33B protrude downward from the frame 4.

[0041] First bus bar 34B is attached to bolt block 31B and electrically connected to bolt 312. As shown in Fig. 6 etc., first bus bar 34B has a first plate portion 341B positioned on the upper surface of resin block 311B, a second plate portion 342B hanging downward from the rear end of first plate portion 341B, a third plate portion 343B provided from the lower end of second plate portion 342B toward the front side and positioned on the lower surface of resin block 311B, and a fourth plate portion 344B hanging downward from the front end of third plate portion 343B and disposed rearward of nut 332B.

[0042] The first plate portion 341B is provided with a bolt insertion hole 345B through which the shaft portion 312b of the bolt 312 is inserted. The bolt insertion hole 345B is provided from the center to the right end of the first plate portion 341B. The first plate portion 341B is fastened together with an external terminal (not shown) provided at the end of a power line connected to a power source by a bolt 312 and a nut (not shown). The second plate portion 342B is inserted into a groove 313B provided in the resin block 311B. The groove 313B penetrates in the up-down direction. The groove 313B is provided extending to the left end of the resin block 311B, and an opening is provided at the left end. The second plate portion 342B can be inserted into the groove 313B from the opening at the left end. The fourth plate portion 344B is provided with a screw insertion hole (not shown) through which a screw Sc is inserted at a portion facing the nut 332B.

[0043] The second bus bar 35 is similar to that in the first embodiment, and therefore a detailed description thereof will be omitted here. Note that the rightmost screw insertion hole 351 of the second bus bar 35 is provided for screwing in the fuse 302 described later.

[0044] The fuse 302 (melting portion) includes a fuse body 302a formed of a chip fuse, and a pair of connecting portions 302b protruding from both ends of the fuse body 302a in the vertical direction. When an overcurrent flows through the fuse body 302a, the fuse body 302a melts to cut off the overcurrent. The pair of connecting portions 302b are plate-shaped and have screw insertion holes (not shown) for passing screws Sc through. The pair of connecting portions 302b allows the fuse 302 to be fixed between the first bus bar 34B and the second bus bar 35 by screws.

[0045] Next, the procedure for assembling the above-mentioned electric connection box 1B will be described. First, the block assembly 3B is assembled. First, the first bus bar 34B is moved from right to left, and the second plate portion 342B is inserted from the left opening of the groove 313B provided in the resin block 311B. At this time, the first plate portion 341B is located on the upper surface of the resin block 311B, and the third plate portion 343B is located on the lower surface of the resin block 311B. When the first bus bar 34B is further moved to the left, the shaft portion 312b of the bolt 312 is inserted from the right opening of the bolt insertion hole 345B. When the first bus bar 34B is further moved to the left, the right end of the second plate portion 342B abuts against the right end of the groove 313B. At this time, the screw insertion hole (not shown) provided in the fourth plate portion 344B faces the nut 322B fixed to the connection block 33B.

[0046] Thereafter, one of the connection portions 392 provided on the fuse 302 is overlapped with the fourth plate portion 344B. At this time, the screw insertion hole (not shown) provided in the fourth plate portion 344B and the screw insertion hole (not shown) provided in the connection portion 392 are overlapped. Thereafter, with the screw Sc passed through the screw insertion hole (not shown) provided in the fourth plate portion 344B and the screw insertion hole (not shown) provided in the connection portion 392, it is screwed into the nut 332B fixed to the connection block 33B. Thereby, the first bus bar 34B and the fuse 302 are connected, the first bus bar 34B is attached to the bolt block 31B, and the fuse 302 is attached to the connection block 33B. Also, at this time, the screw insertion hole (not shown) provided in the connection portion 392 on the lower side of the fuse 302 and the rightmost nut 322 fixed to the nut block 32B face each other in the front-rear direction.

[0047] Next, the second bus bar 35 is overlapped with the rear side of the nut block 32B and the connection portion 392 on the lower side of the fuse 302. At this time, the rightmost screw insertion hole 351 of the second bus bar 35 and the screw insertion hole provided in the connection portion 392 are overlapped. Thereafter, with the screw Sc passed through the rightmost screw insertion hole 351 of the second bus bar 35 and the screw insertion hole provided in the connection portion 392, it is screwed into the nut 322 fixed to the nut block 32B. Thereby, the fuse 302 and the second bus bar 35 are connected, and the second bus bar 35 is attached to the nut block 32B.

[0048] Also, with the screw Sc passed through the screw insertion hole provided in the terminal fitting 100 of the electric wire L and the screw insertion hole 351 of the second bus bar 35, it is screwed into the leftmost and middle nut 322 fixed to the nut block 32B. Thereby, the terminal fitting 100 and the second bus bar 35 are connected, and the terminal fitting 100 is attached to the nut block 32B.

[0049] As shown in FIG. 2, the block assembly 3B assembled as described above is inserted into the frame 4 from below. At this time, the bolt block 31B is accommodated in the frame 4, and the connection block 33B and the nut block 32B protrude from below the frame 4.

[0050] According to the embodiment described above, the fusing portion is constituted by the fuse 302 having a chip fuse, which makes it possible to prevent overcurrent with high precision.

[0051] The present invention is not limited to the above-described embodiment, and can be appropriately modified, improved, etc. In addition, the material, shape, size, number, arrangement location, etc. of each component in the above-described embodiment are arbitrary as long as the present invention can be achieved, and are not limited.

[0052] In the first and second embodiments described above, the third bus bar 36 on which the fusible element 38 is mounted is disposed below the frame 4, but this is not limited thereto. The third bus bar 36 may be disposed within the housing portion 41 of the frame 4.

[0053] In the first and second embodiments, the resin blocks 311, 311B and the resin blocks 321, 321B are integrally connected by the connecting blocks 33, 33B, but this is not limited thereto. The connecting blocks 33, 33B are not essential and may be omitted.

[0054] In the first and second embodiments, the nut blocks 32 and 32B to which the nuts 322 are fixed are used as mounting blocks, but the present invention is not limited to this. A screw block to which the screws Sc are fixed may be used as the mounting block.

[0055] In the first and second embodiments, the second bus bar 35 and the terminal fitting 100 are connected by screw fastening, but the present invention is not limited to this. The second bus bar 35 and the terminal fitting 100 may be connected by a connector.

[0056] Here, the features of the above-described embodiments of the electrical junction box according to the present invention will be briefly summarized and listed in the following [1] to [7]. [1] a bolt block (31, 31B) having a first resin block (311, 311B) and a bolt (312) with a shaft portion (312b) protruding from the first resin block (311, 311B); a resin frame (4) that houses the bolt blocks (31, 31B); a first bus bar (34, 34B) attached to the bolt block (31, 31B) and electrically connected to the bolt (312); a second bus bar (35) disposed on the opposite side of the frame (4) from the protruding direction of the bolt (312) and provided with a connection portion (351) for connection with a terminal fitting (100) attached to an end of an electric wire (L); and a fusing portion (36, 38, 302) connected between the first bus bar (34, 34B) and the second bus bar (35). Electrical junction box (1A, 1B). [2] In the electrical connection box (1A) according to [1], the fusion portion is composed of a third bus bar (36) connected between the first bus bar (34, 34B) and the second bus bar (35), and a fusible element (38) provided on the third bus bar (36). Electrical junction box (1A). [3] In the electrical connection box (1B) according to [1], The fusing portion is composed of a chip fuse (302), the chip fuse (302) is screwed between the first bus bar (34, 34B) and the second bus bar (35); Electrical junction box(1B). [4] In the electrical connection box (1A, 1B) according to any one of [1] to [3], The fusing portion (36, 38, 302) is disposed on the opposite side of the frame (4) from the protruding direction. Electrical junction box (1A, 1B). [5] In the electric connection box (1A, 1B) according to any one of [1] to [4], The second bus bar (35) is provided long in a direction intersecting the protruding direction, A plurality of the terminal fittings (100) are arranged in a line along the longitudinal direction of the second bus bar (35) so as to be connectable to each other. Electrical junction box (1A, 1B). [6] In the electric connection box (1A, 1B) according to any one of [1] to [5], The connection portion of the second bus bar (35) is formed of a screw insertion hole (351) through which a screw is inserted, The second bus bar (35) is fastened together with the terminal metal fitting (100) by the screw (Sc) and the nut (322), and a mounting block (32, 32B) including either the screw (Sc) or the nut (322) and a second resin block (321, 321B) to which the either the screw (Sc) or the nut (322) is fixed and to which the second bus bar (35) is attached. Electrical junction box (1A, 1B). [7] In the electrical connection box (1A, 1B) according to [6], The first resin block (311, 311B) and the second resin block (321, 321B) are integrally provided by being connected to each other by a connecting block (33, 33B). Electrical junction box (1A, 1B). [Explanation of symbols]

[0057] 1A, 1B Electrical junction box 4 Frames 31, 31B Bolt block 32, 32B Nut block (mounting block) 33, 33B connecting block 34, 34B 1st bus bar 35 2nd bus bar 36 Third bus bar (melted part) 38 Fusible element (melting part) 100 Terminal fittings 302 Fuses (chip fuses, melting parts) 311, 311B Resin block (first resin block) 312 Volts 312b Shaft 321, 321B Resin block (second resin block) 322 Nut 351 Screw insertion hole (connection part) Sc Screw L electric wire

Claims

1. a bolt block including a first resin block and a bolt having a shaft portion protruding from the first resin block; A resin frame that houses the bolt block; a first bus bar attached to the bolt block and electrically connected to the bolt; a second bus bar disposed on an opposite side of the frame from a protruding direction of the bolt, the second bus bar having a connection portion for connection to a terminal metal fitting attached to an end of an electric wire; a fusing portion connected between the first bus bar and the second bus bar, Electrical junction box.

2. 2. The electrical junction box according to claim 1, the fusing portion is composed of a third bus bar connected between the first bus bar and the second bus bar, and a fusible element provided on the third bus bar. Electrical junction box.

3. 2. The electrical junction box according to claim 1, the fusing portion is composed of a chip fuse, The chip fuse is screwed between the first bus bar and the second bus bar. Electrical junction box.

4. In the electrical connection box according to any one of claims 1 to 3, The fusing portion is disposed on the opposite side of the frame from the protruding direction. Electrical junction box.

5. The electrical connection box according to any one of claims 1 to 4, The second bus bar is provided long in a direction intersecting the protruding direction, A plurality of the terminal fittings are arranged in a longitudinal direction of the second bus bar so as to be connectable to each other. Electrical junction box.

6. The electrical connection box according to any one of claims 1 to 5, the connection portion of the second bus bar is formed of a screw insertion hole through which a screw passes, the second bus bar is fastened together with the terminal metal fitting by the screw and the nut, a mounting block including either the screw or the nut, and a second resin block to which the either one is fixed and to which the second bus bar is attached, Electrical junction box.

7. 7. The electrical junction box according to claim 6, The first resin block and the second resin block are integrally provided by being connected to each other by a connecting block. Electrical junction box.

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