Junction box

Abstract

The junction box (1) consists of a bottom frame (2) which houses the circuit board (4) and a cover. The top (3) which is paired with the bottom frame (2) to cover the top opening (20) of the bottom frame. (2) The lower frame (2) is provided with front openings (210). The interior walls (25) are assembled by A rear wall (22) and a pair of side walls (23,24) were constructed while the exterior wall (26) was built. At a predetermined distance from the section of the interior wall (25) which comprises the angle (2d) between the walls. The rear (22) and right wall (24) of the junction box (1) have a double-walled structure (27) at the end. The bottom of the inner wall (25) and the outer wall (26) are joined together to provide a vent. (28) between the inner wall (25) and the outer wall (26);

Claims

1. The junction box is assembled with a resin bottom enclosure (2) containing the circuit board (4) and a metal top cover (3) which is matched to the bottom enclosure (2) for the top opening (2o) of the bottom enclosure (2), where the bottom enclosure (2) is provided with a front opening (210). The junction box has a double-walled structure (27), in which the inner wall (23) is assembled by a rear wall (22) facing the front opening (21o) and a pair of side walls (23,21) which are connected to the ends of the rear wall (22) and face each other, while the inner wall The exterior (26) is constructed at a predetermined distance from the section of the interior wall (25), which comprises the angle between the rear wall (22) and at least one side wall (23,24), with the upper end edge (25e) of the interior wall in contact with the lower end surface (30) of the top cover (3), and the upper end edge (26e) of the exterior wall (26) situated on top relative to the interior wall (25), and the lower ends of the interior wall (23) and the exterior wall (20) are joined together to provide a vent (28) between the interior wall (25) and the exterior wall (26).2.

1. A junction box under claim 1 where the upper end edge (26e) of the outer wall (26) comes into contact with the lower end surface (300) of the top cover (3).

3. A junction box under claim 1 or 2 where the vent (28) is open at one end and closed at the other.

4. A junction box under claim 3 where the open end of the vent (28) is provided in the middle of the side walls (23,21) away from the corner between the front opening (210) and the side wall (23,24).

5. A junction box under claim 3 or 4 where the vent (28) is closed at one end.

6. Any of the junction boxes under claims 1 to 5 shall be incorporated with an additional center wall (32) which is provided to extend downward from the lower end surface (30f) of the top cover (3), where the center wall (32) is placed between the inner wall (25) and the outer wall (26). 7.

8. A junction box under claim 6 or 7 which is incorporated with a second inner wall guide (34) which is provided on the inside relative to the center wall (32) to extend down from the lower end surface (30) of the top cover (3), where the guide surface of the first inner wall guide (33) is sloped inward as it extends from the guide end toward the base end and supports the inner wall (25) while pressing the inner wall (25) toward the outside in a state of contact with the outer surface of the inner wall (25).

9. A junction box under claim 6 or 7 which is incorporated with a second inner wall guide (34) which is provided on the inside relative to the center wall (32) to extend down from the lower end surface (30) of the top cover (3), where the guide surface of the second inner wall guide (34) is sloped outward as it extends from the guide end toward the base end and supports the inner wall (25) while pressing the inner wall (25) toward the outside in a state of contact with the inner surface of the inner wall (25).Any of the junction boxes under claims 6 through 8 shall be incorporated with an additional outer wall guide (35) which is provided on the outside relative to the center wall (32) to extend downward from the lower end surface (301) of the top cover (3), whereby the guide surface of the first outer wall guide (35) is sloped inward as it extends from the guide end toward the base end and supports the outer wall (26) while pressing the outer wall (26) inward in a condition of contact with the outer surface of the outer wall (26).

10. Any of the junction boxes under claims 6 through 9 shall be incorporated with a second exterior wall guide (36) which is provided in an integrated manner on the center wall (32) to extend downward from the lower end surface (300) of the top cover (3), whereby the guide surface of the second exterior wall guide (36) is sloped outward as it extends from the guide end towards the base end and supports the exterior wall (20) while pressing the exterior wall (26) outward in contact with the inner surface of the exterior wall (26). 11.

12. Any junction box under any of the claims 6 to 10 which is incorporated with an additional guide section (321) which is placed in the middle of the center wall (32) and is curved relative to an imaginary line (L) that passes through the middle between the inner wall (25) and the outer wall (26). The inner surface of the inner wall (25) and the second outer wall guide (36) which supports the outer wall (26) while pressing the outer wall (26) outward in a condition of contact with the inner surface of the outer wall (26), where the second inner wall guide (34) and the second outer wall guide (36) are offset from each other in the direction along the center wall (32).

13. Any of the junction boxes under claims 1 through 12 which are incorporated with an additional fitting (11) which allows the inner wall (25) and the top cover (3) to fit together.14.The junction box under claim 13, where the fittings (11) are assembled by fitting holes (332) and fitting clamps (252) which engage in fitting holes (332), and the area of ​​the inner wall (25) in which the fitting holes (332) or fitting clamps (232) are provided are made thinner than other areas.

15. Any junction box under claim 14, which is further assembled with clamps (251 or 261) provided at the end edges.

16. Any junction box under claims 1 to 15 shall be incorporated with a drip guard (8) which covers the top surface of the top cover (3) and the drip guard (8) extends beyond the outer edge of the top cover (3).

17. Any junction box under claim 1 in which the terminal socket (3) is made to pass through the front opening (210) and the drip guard (8) extends above the terminal socket (5). 18.The junction box under claim 16 or 7, where the drip guard (8) is folded down and at least one of the side walls (23,24) or the rear wall (22) is covered by the folded portion of the drip guard (8);

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