# US 12,184,050 B2 · Electrical junction box > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,184,050 B2 - Document ID: US12184050B2 - Status: Granted - Kind: B2 - Application number: 18/264,871 - Filed: 2022-01-25 - Published: 2024-03-14 - Granted: 2024-12-31 - Earliest claimed: 2021-02-12 - Assignees: Sumitomo Wiring Systems, Ltd. - Applicants: Sumitomo Wiring Systems, Ltd. - Inventors: Yuya Yoshimura - Web page: https://patentgrep.com/patent/US12184050B2 ## CPC - H02G 3/03: Cooling - B60R 16/0239: {Electronic boxes} - H02G 3/081: {Bases, casings or covers} - H02G 3/16: structurally associated with support for line-connecting terminals within the box - H05K 7/06: on insulating boards {, e.g. wiring harnesses (for printed circuits H05K1/18, H05K3/30)} - H05K 7/20: Modifications to facilitate cooling, ventilating, or heating - H02G: INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES - B60R: VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR - H05K: PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS ## Abstract An electrical junction box includes: a case; a relay; a first heat dissipation member connected to the relay; and a second heat dissipation member connected to the first heat dissipation member. The case includes a first case member, a second case member, a first coupling portion and a second coupling portion coupling the first case member to the second case member. The first case member, the first heat dissipation member, the second heat dissipation member, and the second case member are arranged in a stacked. The first coupling portion and the second coupling portion are arranged at an interval and are orthogonal with respect to the stack, the first heat dissipation member and the second heat dissipation member are interposed therebetween. The first coupling portion is disposed on an outer surface of the case, and the second coupling portion is on an inner surface of the case. ## Claims ### Claim 1 An electrical junction box comprising: a case; a relay that is attached to the case; a first heat dissipation member that is connected to the relay so as to be able to transfer heat; and a second heat dissipation member that is connected to the first heat dissipation member so as to be able to transfer heat, wherein the case includes a first case member, a second case member, and a first coupling portion and a second coupling portion that couple the first case member and the second case member to each other, the first case member, the first heat dissipation member, the second heat dissipation member, and the second case member are stacked in this order in a predetermined first direction, the first coupling portion and the second coupling portion are arranged at an interval in a second direction that is orthogonal to the first direction, with the first heat dissipation member and the second heat dissipation member being interposed therebetween, the first coupling portion is provided on an outer peripheral portion of the case, and the second coupling portion is provided inward of the outer peripheral portion of the case. ### Claim 2 (depends on 1) The electrical junction box according to claim 1, wherein the first heat dissipation member is made of metal, and the second heat dissipation member is made of a synthetic resin. ### Claim 3 (depends on 2) The electrical junction box according to claim 2, wherein the case is provided with a protruding portion that protrudes in the second direction, the first heat dissipation member and the second heat dissipation member are provided on the protruding portion, the first coupling portion is provided at a leading end of the protruding portion in the second direction, and the second coupling portion is provided on the opposite side of the leading end of the protruding portion in the second direction with respect to the first heat dissipation member and the second heat dissipation member. ### Claim 4 (depends on 2) The electrical junction box according to claim 2, wherein the second coupling portion includes: an engagement portion that is provided on the first case member; and an engagement-target portion that is provided on the second case member and engages with the engagement portion in the first direction, and at least either one of the engagement portion and the engagement-target portion is provided with an inclined engagement surface that is configured to bring the other of the engagement portion and the engagement-target portion closer to the one of the engagement portion and the engagement-target portion in a direction orthogonal to the first direction when the first case member and the second case member, with the engagement portion and the engagement-target portion engaging with each other, are separated from each other. ### Claim 5 (depends on 2) The electrical junction box according to claim 2, wherein the second coupling portion includes: an engagement portion that is provided on the first case member; and an engagement-target portion that is provided on the second case member and with which the engagement portion engages, the second case member is provided with an opening that passes therethrough in the first direction at a position near the engagement-target portion, and the second case member is provided with a wall that is located between the opening and the first heat dissipation member and protrudes toward the first case member. ### Claim 6 (depends on 1) The electrical junction box according to claim 1, wherein the case is provided with a protruding portion that protrudes in the second direction, the first heat dissipation member and the second heat dissipation member are provided on the protruding portion, the first coupling portion is provided at a leading end of the protruding portion in the second direction, and the second coupling portion is provided on the opposite side of the leading end of the protruding portion in the second direction with respect to the first heat dissipation member and the second heat dissipation member. ### Claim 7 (depends on 6) The electrical junction box according to claim 6, wherein the case is further provided with a third coupling portion and a fourth coupling portion that couple the first case member and the second case member to each other, at two ends of the protruding portion in a third direction that is orthogonal to the first direction and the second direction. ### Claim 8 (depends on 7) The electrical junction box according to claim 7, wherein the second coupling portion includes: an engagement portion that is provided on the first case member; and an engagement-target portion that is provided on the second case member and engages with the engagement portion in the first direction, and at least either one of the engagement portion and the engagement-target portion is provided with an inclined engagement surface that is configured to bring the other of the engagement portion and the engagement-target portion closer to the one of the engagement portion and the engagement-target portion in a direction orthogonal to the first direction when the first case member and the second case member, with the engagement portion and the engagement-target portion engaging with each other, are separated from each other. ### Claim 9 (depends on 7) The electrical junction box according to claim 7, wherein the second coupling portion includes: an engagement portion that is provided on the first case member; and an engagement-target portion that is provided on the second case member and with which the engagement portion engages, the second case member is provided with an opening that passes therethrough in the first direction at a position near the engagement-target portion, and the second case member is provided with a wall that is located between the opening and the first heat dissipation member and protrudes toward the first case member. ### Claim 10 (depends on 6) The electrical junction box according to claim 6, wherein the second coupling portion includes: an engagement portion that is provided on the first case member; and an engagement-target portion that is provided on the second case member and engages with the engagement portion in the first direction, and at least either one of the engagement portion and the engagement-target portion is provided with an inclined engagement surface that is configured to bring the other of the engagement portion and the engagement-target portion closer to the one of the engagement portion and the engagement-target portion in a direction orthogonal to the first direction when the first case member and the second case member, with the engagement portion and the engagement-target portion engaging with each other, are separated from each other. ### Claim 11 (depends on 6) The electrical junction box according to claim 6, wherein the second coupling portion includes: an engagement portion that is provided on the first case member; and an engagement-target portion that is provided on the second case member and with which the engagement portion engages, the second case member is provided with an opening that passes therethrough in the first direction at a position near the engagement-target portion, and the second case member is provided with a wall that is located between the opening and the first heat dissipation member and protrudes toward the first case member. ### Claim 12 (depends on 1) The electrical junction box according to claim 1, wherein the second coupling portion includes: an engagement portion that is provided on the first case member; and an engagement-target portion that is provided on the second case member and engages with the engagement portion in the first direction, and at least either one of the engagement portion and the engagement-target portion is provided with an inclined engagement surface that is configured to bring the other of the engagement portion and the engagement-target portion closer to the one of the engagement portion and the engagement-target portion in a direction orthogonal to the first direction when the first case member and the second case member, with the engagement portion and the engagement-target portion engaging with each other, are separated from each other. ### Claim 13 (depends on 12) The electrical junction box according to claim 12, wherein the second coupling portion includes: an engagement portion that is provided on the first case member; and an engagement-target portion that is provided on the second case member and with which the engagement portion engages, the second case member is provided with an opening that passes therethrough in the first direction at a position near the engagement-target portion, and the second case member is provided with a wall that is located between the opening and the first heat dissipation member and protrudes toward the first case member. ### Claim 14 (depends on 1) The electrical junction box according to claim 1, wherein the second coupling portion includes: an engagement portion that is provided on the first case member; and an engagement-target portion that is provided on the second case member and with which the engagement portion engages, the second case member is provided with an opening that passes therethrough in the first direction at a position near the engagement-target portion, and the second case member is provided with a wall that is located between the opening and the first heat dissipation member and protrudes toward the first case member.