Fuse module and fuse system

Abstract

To provide a technique capable of replacing a fuse outside a housing of an electrical connection box.SOLUTION: A fuse module 20 includes: a drawer part 21 for closing an opening 14A of a housing 11 of an electrical connection box 10; and a fuse 22 detachably attached to the drawer part 21. The drawer part 21 includes a connector part 36 including a pair of terminals 24 and 25 electrically connected to both sides of the fuse 22. The connector part 36 is connected to a harness 50 provided inside the housing 11. The drawer part 21 is configured to be drawable to the outside of the housing 11. The fuse 22 is exposed to the outside of the housing 11 when the drawer part 21 is drawn out. The drawer part 21 includes hooking parts 32, 33, 34, and 35 that are caught on the housing 11 when the drawing amount reaches an upper limit.SELECTED DRAWING: Figure 6

Description

[Technical Field]

[0001] The present disclosure relates to fuse modules and fuse systems. [Background technology]

[0002] Patent Documents 1 and 2 disclose technologies that allow the replacement of fuses in an electrical junction box. In Patent Document 1, the fuse can be replaced by removing the cover, the first sealing material, and the lid from the first housing. In Patent Document 2, the fuse can be replaced by removing the maintenance cover from the upper cover body. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2017-175681 [Patent Document 2] Japanese Patent Application Publication No. 2019-4639 Summary of the Invention [Problem to be solved by the invention]

[0004] In the configurations of Patent Documents 1 and 2, it is necessary to replace the fuse inside the electrical junction box.

[0005] The present disclosure aims to provide a technique that allows fuses to be replaced outside the housing of an electrical junction box. [Means for solving the problem]

[0006] The fuse module of the present disclosure comprises: a drawer portion that closes an opening of a housing of the electrical junction box; a fuse detachably attached to the drawer portion, the lead-out portion has a connector portion including a pair of terminals electrically connected to both sides of the fuse, the connector portion is connected to a harness provided inside the housing, the drawer portion is configured to be able to be drawn out to the outside of the housing, the fuse is exposed to the outside of the housing when the drawer portion is pulled out, The drawer has a catch portion that catches on the housing when the drawer reaches an upper limit.

[0007] The fuse system of the present disclosure comprises: a fuse module of the present disclosure; The harness; and a reel around which the wiring portion of the harness is wound. [Effects of the Invention]

[0008] According to the technique of the present disclosure, the fuse can be replaced outside the housing of the electrical junction box. [Brief explanation of the drawings]

[0009] [Figure 1] FIG. 1 is a perspective view of an electrical junction box including a fuse module according to a first embodiment. [Figure 2] FIG. 2 is an exploded perspective view of the electrical junction box of the first embodiment. [Figure 3] FIG. 3 is a perspective view of the fuse module. [Figure 4] FIG. 4 is an exploded perspective view of the fuse module. [Figure 5] FIG. 5 is a cross-sectional view of the electrical junction box when the drawer portion is in the first position. [Figure 6] FIG. 6 is a cross-sectional view of the electrical junction box when the drawer portion is in the second position. [Figure 7] FIG. 7 is an enlarged view of the fuse module and its periphery shown in FIG. [Figure 8] FIG. 8 is a cross-sectional view taken along line AA in FIG. [Figure 9] FIG. 9 is a perspective view of an electrical junction box including a fuse module according to the second embodiment. [Figure 10]FIG. 10 is a perspective view of an electrical junction box including a fuse module according to the third embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0010] [Description of the embodiments of the present disclosure] First, embodiments of the present disclosure will be listed and described.

[0011] [1] A drawer portion that closes an opening in the housing of the electrical connection box; a fuse detachably attached to the drawer portion, the lead-out portion has a connector portion including a pair of terminals electrically connected to both sides of the fuse, the connector portion is connected to a harness provided inside the housing, the drawer portion is configured to be able to be drawn out to the outside of the housing, the fuse is exposed to the outside of the housing when the drawer portion is pulled out, The drawer has a catch that catches on the housing when the drawer reaches an upper limit. Fuse module.

[0012] With this configuration, a worker can replace the fuse by pulling the draw-out portion out of the housing, exposing the fuse. In other words, with this configuration, a worker can replace the fuse outside the housing of the electrical junction box. However, when the draw-out portion is pulled out, the harness connected to the connector portion is also pulled. However, with this configuration, the catch portion catches on the housing when the pull-out amount reaches its upper limit, so the amount by which the harness is pulled when the draw-out portion is pulled out can be limited.

[0013] [2] The hook portion is provided in pair, The pair of hook portions are arranged side by side in a first direction perpendicular to the drawing direction of the drawing portion. The fuse module according to [1].

[0014] According to this configuration, when the withdrawal amount reaches the upper limit, the force that the catch portion receives when it comes into contact with the housing can be dispersed in the first direction by the pair of catch portions.

[0015] [3] Two pairs of the hook portions are provided, The two pairs of hook portions are arranged side by side in the pull-out direction and a second direction perpendicular to the first direction. The fuse module according to [2].

[0016] With this configuration, the force that the hooking portions receive when they come into contact with the housing when the withdrawal amount reaches the upper limit can be dispersed in the first and second directions by the two pairs of hooking portions.

[0017] [4] The fuse is fixed to the drawer using a bolt, The bolt is exposed to the outside of the housing when the drawer portion is drawn out. The fuse module according to any one of [1] to [3].

[0018] With this configuration, an operator can remove the fuse by unscrewing the bolt exposed to the outside of the housing.

[0019] [5] The opening is provided in the upper wall of the housing, The drawer is pulled out upward, The bolt with the fuse fixed thereto is arranged so that its axial direction is perpendicular to the vertical direction, The drawer has a fall prevention part that is disposed directly below the bolt when the fuse is fixed. The fuse module according to [4].

[0020] The fuse module can prevent the bolt removed when replacing the fuse from falling into the housing by the fall prevention portion.

[0021] [6] The housing has a storage section having a main opening having an opening area larger than that of the opening, and a cover section covering the main opening, The drawer is attached to the opening provided in the cover. [1] to [5]. The fuse module according to any one of [1] to [5].

[0022] With this configuration, an operator can replace the fuse without removing the cover.

[0023] [7] The housing has a storage section and a cover section, The storage section has the opening and a main opening having an opening area larger than that of the opening, The cover portion is attached to the main opening, The drawer is attached to the opening provided at a position separate from the main opening. [1] to [5]. The fuse module according to any one of [1] to [5].

[0024] With this configuration, an operator can replace the fuse without removing the cover.

[0025] [8] The fuse module according to any one of [1] to [7], The harness; a reel around which the wiring portion of the harness is wound, Fuse system.

[0026] According to this configuration, since the wiring portion is wound around the reel, even if the wiring portion is pulled by the pull-out portion when the pull-out portion is pulled out, the wiring portion is unlikely to get caught on electronic components or the like inside the housing.

[0027] [Details of the embodiments of the present disclosure] 1. First embodiment 1-1. Configuration of the electrical junction box 10 An electric junction box 10 including a fuse module 20 of the first embodiment is a device that electrically connects a first device 91 and a second device 92, as shown in FIG.

[0028] The electrical junction box 10 shown in Figures 1 and 2 includes a housing 11 and an electronic component 12. The housing 11 is box-shaped. The housing 11 is made of, for example, metal. The housing 11 has a storage section 13 and a cover section 14. The storage section 13 has a main opening 13A and is container-shaped. The cover section 14 is attached to the main opening 13A so as to cover the main opening 13A. The cover section 14 has an opening 14A. The opening 14A is provided in the upper wall section 11A of the housing 11. The opening area of ​​the opening 14A is smaller than the opening area of ​​the main opening 13A.

[0029] The electronic component 12 is disposed inside the housing 11. The electronic component 12 is, for example, a relay or a sensor.

[0030] 3 and 4 includes a drawn-out portion 21, a fuse 22, and conductive portions 24 and 25. The drawn-out portion 21 is fixed to the housing 11 in a state where it closes the opening 14A of the housing 11. The drawn-out portion 21 is fixed to the housing 11 using a bolt 40. When the bolt 40 is removed, the drawn-out portion 21 can be drawn out to the outside of the housing 11 (see FIGS. 5 and 6). The drawn-out portion 21 is drawn out upward.

[0031] The drawer 21 has a lid 30, a fuse mounting portion 31, two pairs of hooks 32, 33, 34, and 35, and a connector portion 36. The lid 30 closes the opening 14A of the housing 11. The lid 30 is made of, for example, metal.

[0032] The fuse 22 is detachably attached to the fuse attachment portion 31. The fuse attachment portion 31 has a base portion 31A to which the fuse 22 is attached, and a peripheral wall portion 31B that surrounds the periphery of the fuse 22 attached to the base portion 31A. In a first direction perpendicular to the direction in which the draw-out portion 21 is drawn, the fuse 22 is attached to one side of the base portion 31A. The peripheral wall portion 31B has a cylindrical shape that protrudes from the outer periphery of the base portion 31A to one side in the first direction. One end of the peripheral wall portion 31B in the first direction is open. The fuse 22 is removed through this opening. The fuse attachment portion 31 is made of, for example, resin. The fuse attachment portion 31 is configured as a separate body from the lid portion 30. The fuse attachment portion 31 is detachably attached to the lid portion 30 using bolts 41.

[0033] Each of the catch portions 32, 33, 34, and 35 has an arm portion 32A, 33A, 34A, and 35A extending in the opposite direction to the drawing direction from the fuse mounting portion 31. The arm portions 32A, 33A, 34A, and 35A have the function of guiding the drawing portion 21 in the drawing direction by displacing along the inner circumferential surface of the opening 14A.

[0034] Each of the hook portions 32, 33, 34, and 35 has a protrusion 32B, 33B, 34B, or 35B that protrudes from the arm portion 32A, 33A, 34A, or 35A in a direction perpendicular to the drawing direction. The hook portions 32 and 33 form a pair. The hook portions 32 and 33 are arranged side by side in a first direction. The protrusions 32B and 33B protrude in the first direction. The protrusions 32B and 33B protrude in opposite directions. The hook portions 34 and 35 form a pair. The hook portions 34 and 35 are arranged side by side in the first direction. The protrusions 34B and 35B protrude in the first direction. The protrusions 34B and 35B protrude in opposite directions. The pair of hook portions 32 and 33 and the pair of hook portions 34 and 35 are arranged at an interval in a second direction perpendicular to the drawing direction and the first direction. The pair of catch portions 32, 33 and the pair of catch portions 34, 35 are arranged side by side in the second direction. Protrusions 32B, 33B, 34B, and 35B of catch portions 32, 33, 34, and 35 catch on inner wall 11B of housing 11 when drawer portion 21 reaches its upper limit. That is, drawer portion 21 is displaced between a first position where it blocks opening 14A and a second position where drawer portion 21 is pulled out from the first position and catches on inner wall 11B of housing 11. With this configuration, the force exerted by catch portions 32, 33, 34, and 35 when they come into contact with housing 11 when drawer portion 21 reaches its upper limit can be dispersed in the first and second directions by the two pairs of catch portions 32, 33, 34, and 35.

[0035] The hook portions 32, 33, 34, and 35 are made of, for example, resin, and are integrally molded with, for example, the peripheral wall portion 31B.

[0036] The fuse 22 is detachably attached to the base portion 31A of the fuse attachment portion 31. The fuse 22 has a fuse body 22A and extension portions 22B and 22C extending from both sides of the fuse body 22A. The extension portions 22B and 22C are fixed to the fuse attachment portion 31 using bolts 42. The extension portion 22B is fastened together with the conductive portion 24 by the bolts 42. The extension portion 22B is fastened together with the conductive portion 25 by the bolts 42. The fuse 22 is attached and detached by attaching and detaching the extension portions 22B and 22C. The fuse attachment portion 31, the fuse 22, and the bolts 42 are disposed inside the housing 11 when the drawer portion 21 is in the first position. The fuse 22 and the bolts 42 are entirely covered by the lid portion 30. When the drawer 21 is in the second position, the fuse mounting portion 31, the fuse 22, and the bolt 42 are disposed outside the housing 11 and are exposed to the outside of the housing 11. The drawer 21 and the bolt 42 are exposed on one side in the first direction. The peripheral wall 31B described above has a fall prevention portion 31C that is disposed directly below the bolt 42 in a state in which the fuse 22 is fixed.

[0037] As shown in FIG. 8, the connector portion 36 is provided on the other side of the base portion 31A in the first direction. The connector portion 36 includes a pair of terminals 36A, 36B and a connector housing 36C that accommodates the pair of terminals 36A, 36B. The pair of terminals 36A, 36B are electrically connected to both sides of the fuse 22. The pair of terminals 36A, 36B are arranged to extend along the first direction. The terminal 36A is electrically connected to the extension portion 22B via the conductive portion 24. The terminal 36B is electrically connected to the extension portion 22C via the conductive portion 25. The connector housing 36C has a cylindrical shape that protrudes from the base portion 31A of the fuse mounting portion 31 toward the other side in the first direction. The connection port 36X of the connector portion 36 faces the other side in the first direction.

[0038] As shown in FIG. 5 , the electrical junction box 10 includes a harness 50 electrically connected to the connector portion 36. The harness 50, together with the fuse module 20, constitutes a fuse system 70. The harness 50 is provided inside the housing 11. The harness 50 includes a wiring portion 51 and a mating connector portion 52 provided at an end of the wiring portion 51. As shown in FIG. 8 , the mating connector portion 52 includes a pair of mating terminals 52A and 52B and a mating connector housing 52C. When the mating connector housing 52C is mated with the connector housing 36C, the pair of mating terminals 52A and 52B are electrically connected to the pair of terminals 36A and 36B. As shown in FIG. 7 , the mating connector housing 52C includes a locking portion 52D and a release operation portion 52E. The locking portion 52D locks with the connector portion 36 when the mating connector housing 52C is mated with the connector housing 36C. Connector unit 36 ​​includes lock-receiving portion 36D that is locked with locking portion 52D. Release operation portion 52E is disposed on the housing 11 side of mating connector unit 52 when drawer 21 is in the second position. In this state, release operation portion 52E is pressed in the direction opposite to the housing 11 side, thereby releasing the locked state between locking portion 52D and lock-receiving portion 36D.

[0039] As shown in Fig. 8, the connector portion 36 is disposed between the pair of hook portions 32, 33 and the pair of hook portions 34, 35 in the second direction. The opening 14A described above includes an expansion portion 14B that protrudes outward to increase the opening area. The expansion portion 14B is disposed between the pair of hook portions 32, 33 and the pair of hook portions 34, 35. The connector portion 36 passes through the opening portion expanded by the expansion portion 14B.

[0040] 1-2. Functions and Effects of Fuse Module 20 The fuse module 20 is fixed to the housing 11 using bolts 40. As shown in FIG. 5, when the fuse module is fixed to the housing 11, the fuse 22 is disposed inside the housing 11.

[0041] By removing the bolt 40, the draw-out portion 21 of the fuse module 20 can be drawn out. When the draw-out portion 21 is drawn out to the outside of the housing 11, the fuse 22 and the harness 50 connected to the connector portion 36 are drawn out to the outside of the housing 11, as shown in FIG. 6 , and the fuse 22 and the harness 50 are exposed to the outside of the housing 11.

[0042] The harness 50 is removed from the connector portion 36. Specifically, the release operation portion 52E is pressed to release the locked state between the locking portion 52D and the lock receiving portion 36D, and the mating connector portion 52 is removed from the connector portion 36. This cuts off the electrical connection between the fuse 22 and the harness 50.

[0043] Thereafter, the bolt 42 is removed. The bolt 42, which has fixed the fuse 22, is arranged so that its axial direction is along the first direction. Therefore, the bolt 42 is removed in the direction along the first direction. At this time, the fall prevention part 31C is arranged directly below the bolt 42 (see FIGS. 7 and 8). Therefore, the fall prevention part 31C prevents the bolt 42 from falling into the housing 11.

[0044] After the bolts 42 are removed, the fuse 22 is removed. Then, a new fuse 22 is fixed using the bolts 42, and the harness 50 is connected to the connector portion 36. Then, the draw-out portion 21 is returned to the first position and fixed to the housing 11 using the bolts 40.

[0045] In this way, by pulling out the draw-out portion 21 to the outside of the housing 11, the worker can expose the fuse 22 to the outside of the housing 11 and replace the fuse 22. In other words, with this configuration, the worker can replace the fuse 22 outside the housing 11 of the electrical junction box 10. However, when the draw-out portion 21 is pulled out, the harness 50 connected to the connector portion 36 is also pulled. However, with this configuration, the catch portions 32, 33, 34, and 35 catch on the housing 11 when the amount of pulling out reaches the upper limit, so that the amount by which the harness 50 is pulled when the draw-out portion 21 is pulled out can be limited.

[0046] Furthermore, an operator can remove the fuse 22 by removing the bolt 40 exposed to the outside of the housing 11.

[0047] Furthermore, since the worker can replace the fuse 22 by pulling out the drawer portion 21 to the outside of the housing 11, the fuse 22 can be replaced without removing the cover portion 14.

[0048] 2. Second embodiment In the second embodiment, a configuration will be described in which a wiring portion 51 of a harness 50 is wound around a reel 60. In the second embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof will be omitted.

[0049] 9, the electrical junction box 210 of the second embodiment includes a reel 60 and a cylindrical body 61. The electrical junction box 210 of the second embodiment is common to the electrical junction box 10 of the first embodiment in other respects. The reel 60 and the cylindrical body 61, together with the fuse module 20 and the harness 50, constitute a fuse system 270.

[0050] The wiring portion 51 of the harness 50 is wound around the reel 60 inside the cylindrical body 61. That is, when the pull-out portion 21 is in the first position, the wiring portion 51 is wound around the reel 60, and when the pull-out portion 21 is pulled out, the wiring portion 51 is pulled out from the reel 60. With this configuration, even if the wiring portion 51 is pulled by the pull-out portion 21 when the pull-out portion 21 is pulled out, the wiring portion 51 is unlikely to get caught on the electronic components 12 (see FIG. 2 ) inside the housing 11.

[0051] 3. Third embodiment In the third embodiment, a configuration will be described in which the opening is provided in the housing portion rather than the cover portion. Note that in the third embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof will be omitted.

[0052] 10, an electrical junction box 310 of the third embodiment includes a housing 311 instead of the housing 11 described in the first embodiment. In other respects, the electrical junction box 310 of the third embodiment is common to the electrical junction box 10 of the first embodiment.

[0053] The housing 311 is box-shaped. The housing 311 is made of, for example, metal. The housing 311 has a storage section 313 and a cover section 314. The storage section 313 has a main opening 313A and an opening 313B and is container-shaped. The opening area of ​​the opening 313B is smaller than the opening area of ​​the main opening 313A. The cover section 314 is attached to the main opening 313A in a state where it covers the main opening 313A. The fuse module 20 is attached to the opening 313B.

[0054] In the electrical junction box 310 of the third embodiment, the worker can also replace the fuse 22 without removing the cover portion 314.

[0055] <Other embodiments> The present disclosure is not limited to the embodiments described above and in the drawings. For example, any combination of features of the above-described or following embodiments is possible within a range that does not contradict. Furthermore, any feature of the above-described or following embodiments may be omitted unless explicitly stated as essential. Furthermore, the above-described embodiment may be modified as follows.

[0056] The cover and the fuse mounting portion may be integral.

[0057] The embodiments disclosed herein should be considered to be illustrative in all respects and not restrictive. The scope of the present invention is not limited to the embodiments disclosed herein, but is defined by the claims, and is intended to include all modifications within the meaning and scope of the claims. [Explanation of symbols]

[0058] 10...Electrical junction box 11...Housing 11A…Top wall part 11B…Inner wall 12...Electronic components 13...Storage section 13A...Main opening 14...Cover part 14A…Opening 14B...extension 20...Fuse module 21...Drawer part 22...Fuse 22A...Fuse body 22B…Extension part 22C…Extension part 24...Conductive part 25...Conductive part 30…Lid part 31...Fuse mounting section 31A...Base part 31B…Peripheral wall part 31C…Fall prevention part 32...Hook part 32A...Arm section 32B…Protrusion 33...Hook part 33A...Arm section 33B…Protrusion 34...Hook part 34A...Arm section 34B…Protrusion 35...Hooking part 35A...Arm section 35B…Protrusion 36...Connector part 36A...Terminal 36B…Terminal 36C...Connector housing 36D…Lock receiving part 36X...Connection port 40...volts 41...Bolt 42...Volts 50...Harness 51...Wiring section 52...Mating connector part 52A...Mating terminal 52B...Mating terminal 52C...Mating connector housing 52D...Latching part 52E…Release operation part 60...reel 61...Cylinder 70...Fuse system 91…First device 92…Second device 210...Electrical junction box 270...Fuse system 310...Electrical junction box 311…Housing 313…Storage section 313A...Main opening 313B…Opening 314...Cover part

Claims

1. a drawer portion that closes an opening of a housing of the electrical junction box; a fuse detachably attached to the drawer portion, the lead-out portion has a connector portion including a pair of terminals electrically connected to both sides of the fuse, the connector portion is connected to a harness provided inside the housing, the drawer portion is configured to be able to be drawn out to the outside of the housing, the fuse is exposed to the outside of the housing when the drawer portion is pulled out, The drawer has a catch that catches on the housing when the drawer reaches an upper limit. Fuse module.

2. The hook portion is provided in pair, The pair of hook portions are arranged side by side in a first direction perpendicular to the drawing direction of the drawing portion. The fuse module of claim 1 .

3. The hook portion is provided in two pairs, The two pairs of hook portions are arranged side by side in the pull-out direction and a second direction perpendicular to the first direction. The fuse module of claim 2 .

4. The fuse is fixed to the drawer using a bolt, The bolt is exposed to the outside of the housing when the drawer portion is drawn out. The fuse module according to any one of claims 1 to 3.

5. the opening is provided in an upper wall of the housing, The drawer is pulled out upward, The bolt with the fuse fixed thereto is arranged so that its axial direction is perpendicular to the vertical direction, The drawer has a fall prevention part that is disposed directly below the bolt when the fuse is fixed. The fuse module of claim 4 .

6. the housing includes a storage section having a main opening having an opening area larger than that of the opening section, and a cover section that covers the main opening, The drawer is attached to the opening provided in the cover. The fuse module according to any one of claims 1 to 3.

7. The housing has a housing portion and a cover portion, The storage section has the opening and a main opening having an opening area larger than that of the opening, The cover portion is attached to the main opening, The drawer is attached to the opening provided at a position separate from the main opening. The fuse module according to any one of claims 1 to 3.

8. A fuse module according to any one of claims 1 to 3; The harness; a reel around which the wiring portion of the harness is wound, Fuse system.

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