JP3019748B2 - Power disconnector waterproof structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a waterproof structure for a power disconnector.

[0002]

2. Description of the Related Art Conventionally, in this type of power disconnector,
As shown in FIG. 5, there is known a device in which the entire power supply disconnector is installed in a waterproof box. In recent years, a compact power supply disconnector having a waterproof structure has been desired in an electric vehicle or the like.

[0003]

For this reason, the applicant of the present application has devised a power supply disconnector including a box-shaped lower case and a lid-shaped upper case capable of covering the lower case.
A pair of male electrodes are erected on the upper surface of the lower case, and the wires are penetrated through the side walls of the lower case and are connected to the male electrodes inside. On the ceiling surface of the upper case, a conductive electrode that can be fitted and connected to the pair of male electrodes is held, and on the inner peripheral wall surface of the upper case, a sealing member that closes a gap with the outer peripheral surface of the lower case is provided. Is held.
On the other hand, in the lower case as well, a rubber plug is held at the lead-out portion of the electric wire to form a sealed space inside.

However, when attempting to cover the upper case in the form of a lid, the pressure inside the sealed space increases, and in the lower case, the rubber plug of the electric wire tends to come off due to the internal pressure. For this reason, a retainer must be installed together with the rubber stopper to prevent the rubber stopper from coming off. The present invention has been made in view of the above problems, and has as its object to provide a waterproof structure of a power cut-off device which is a smaller power cut-off device and can reduce the number of rubber plugs and retainers.

[0005]

In order to achieve the above object, according to the first aspect of the present invention, a pair of electrodes are erected on a first box-shaped housing through a panel of the housing. A penetrating portion is provided with a sealing member, and a pair of electric wires are connected to the same pair of electrodes on the back side of the panel, and the second housing covering the first housing has the pair of electrodes. And a short-circuit electrode for conducting between the electrodes, and a seal structure for hermetically holding the conductive portion of the electrode.

[0006]

In the present invention constructed as described above, a pair of electrodes are erected through the box-shaped first housing through the panel of the housing, and the panel is mounted on the same pair of electrodes. A pair of wires are connected on the back side of
When the first housing is covered with a second housing having a short-circuit electrode for conducting between the pair of electrodes,
Since the pair of electrodes is conducted through the short-circuit electrode, the pair of wires is also conducted. By the way, when the first housing covers the second housing with the first housing, the conductive portion of the electrode is kept airtight, but this increases the internal pressure of the sealed space. However, since a sealing member is provided at the portion of the pair of electrodes that penetrates the panel, the upper side of the electrodes is isolated from the outside.

[0007]

As described above, according to the present invention, since the upper side of the electrode is isolated from the outside, the conductive part of the electrode is held in a water-proof manner without being flooded from the inside of the lower case to the upper side of the electrode. You. Further, even if the internal pressure on the upper side of the electrode increases, the internal pressure in the first housing, which is the back surface of the panel, does not increase, and the rubber plug does not come off.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing a power cut-off device to which a waterproof structure according to an embodiment of the present invention is applied, and FIG. 2 is a cross-sectional view. In the present embodiment, a pair of male electrodes 2 is provided in a box-shaped lower case 10 serving as a first housing.
0, 20 is held, and the lower electrode 10 is inserted into a lid-shaped upper case 30 which is a second housing capable of covering the lower case 10 from above. The electrodes 40, 40 are held.

In FIG. 1, a cylindrical male electrode 20 is
A male having an upper conductive portion 21 having a hemispherical tip, a flange 22 at a substantially central position in the length direction, and a male screw formed on the outer peripheral surface below the flange 22. The screw portion 23 is provided. Lower case 10
The upper panel is formed with two through holes 11, 11 into which the pair of male electrodes 20, 20 can be inserted from above, and projects upward from the periphery of the through holes 11, 11. Cylindrical body 12 that can accommodate male side electrode 20
It has.

On the inner peripheral surface of the upper end of the cylindrical body 12, there is formed a step portion 12a having an opening diameter slightly larger than that of the step portion 12a.
A ring-shaped seal member 13 is attached to a, and a cap 14 having a cross-sectional shape that wraps the outer peripheral surface, the upper end, and the inner peripheral surface is attached to the upper end of the cylindrical body 12. The cap 14 contacts the upper end of the seal member 13 on the inner peripheral surface side of the cylindrical body 12 to prevent the seal member 13 from coming off. The male screw portion 23 of the male electrode is provided on the bottom of the lower case 10.
Are formed to face the nuts. Male screw portions 23, 23 in each male side electrode 20, 20
O-rings 16 are attached to the upper end of the male electrode 20, and the male screw portion 23 of the male-side electrode 20 is made to penetrate from the upper surface side of the through hole 11.
A collar 24 and a nut 25 are mounted through the cylindrical portion 15. Also, on the side surface of the lower case 10, a cylindrical portion 17, 1 for pulling out the electric wire is provided so as to face the male screw portion 23.
7 is also formed, an electric wire 50 having a plate-shaped crimp terminal 51 at the tip is inserted from the cylindrical portion 17, and the crimp terminal 51 is interposed between the collar 24 and the nut 25 and fixed by bolting. Like that.

In this embodiment, the O-ring 16 is provided for sealing between the panel of the lower case 10 and the male electrode 20. Alternatively, a ring-shaped sealing member or the like may be used. On the other hand, upper case 3
Numeral 0 is formed in a deep lid shape having an opening on the lower surface, and holds a pair of female electrodes 40, 40 on the ceiling surface. The female electrode 40 is formed in a cylindrical shape that opens downward, and has a male screw portion 41 protruding upward on the upper surface, and a screw formed on the ceiling surface of the upper case 30 with the male screw portion 41. It is screwed into the hole 31 and held. At this time, the fuse 60 having the electrodes 61, 61 through which the male screw portions 41, 41 can be inserted at both ends is aligned with the ceiling surface, and when attaching the pair of female electrodes 40, 40, the male screw The part 41 is connected to the electrode 6 of the fuse 60.
1 is screwed into the screw hole 31 of the upper case 30. As a result, the pair of female electrodes 40, 40 is conducted through the fuse 60, and becomes a short-circuit electrode. Female electrode 4
0 is insertable into the cylindrical body 12 of the lower case 10, and when inserted into the cylindrical body 12, the seal is provided between the outer peripheral surface of the female electrode 40 and the inner peripheral surface of the cylindrical body 12. Member 13
Is compressed and held.

In this embodiment, as shown in FIG. 3, the cylindrical body 12 is formed so as to accommodate the conductive portion 21 of the male electrode 20, and the sealing member 13 is held at the opening of the cylindrical body 12. A watertight space is formed between the cylindrical body 12 that houses the male electrode 20 and the outer peripheral surface of the female electrode 40. But,
What is necessary is just to seal the conductive part 21 of the male side electrode 20, for example,
As shown in FIG. 4, instead of the seal member 13, the O-ring 18 may be held by the female electrode 40 to form a water-tight space. Further, a sealing member may be interposed between the inner peripheral surface of the peripheral wall of the upper case 30 and the outer peripheral surface of the lower case 10 to seal the entire upper part of the lower case 10 above the upper panel.

The inner diameter of the cylindrical female electrode 40 is larger than that of the male electrode 20 and does not contact the male electrode 20 as it is. Since the louver 42 is held and the male electrode 20 is inserted while compressing the louver 42,
Reliable conduction can be obtained while reducing the resistance.
A handle 32 for operation is formed on the upper surface of the upper case 30, and a lock arm 33 having flexibility that can be engaged with the wedge-shaped projection 19 formed on the side surface of the lower case 10 is formed on the outer surface. is there.

In this embodiment, the lower case 10 is not waterproofed by water from below. However, by closing the opening portions of the cylindrical portions 15 and 17 with rubber stoppers, more complete waterproofing is achieved. be able to. At this time,
Even if the internal pressure increases above the male electrode 20, the O-ring 16
Since there is no effect on the lower sealed space, the rubber stopper does not come off. Next, the operation of the present embodiment having the above configuration will be described. In the lower case 10, an O-ring 16 is attached to the upper end of the male screw portion 23 of the male electrode 20, inserted into the cylindrical body 12 protruding from the upper surface of the lower case 10, and penetrated through the through-hole 11. A crimp terminal 51 is crimped to the end of the electric wire 50, and is inserted from the side of the crimp terminal 51 into the cylindrical portion 17 on the side surface of the lower case 10. Lower case 1
The collar 24 is inserted through the cylindrical portion 15 on the back surface of No. 0 and inserted into the male screw portion 23, the crimp terminal 51 is inserted, and the nut 25 is screwed and tightened. Then
The male electrode 20 is fixed to the lower case 10 by sandwiching the periphery of the through hole 11 between the flange portion 22 and the collar 24, and the electric wire 50 having the crimp terminal 51 fixed to the tip is also connected.

On the other hand, in the upper case 30, the electrodes 61, 61 of the fuse 60 are screwed into the screw holes 31, 31 in the ceiling surface.
The male screw 41 of the female electrode 40 is inserted into the screw holes 31 and screwed together. Thus, the female electrodes 40, 40 are fixed to the upper case 30 and are conducted through the fuse 60. After this,
When the upper case 30 is put on the upper surface of the lower case 10, the female electrode 40 is inserted into the cylindrical body 12 protruding from the upper surface of the lower case 10. Female electrode 40 is cylindrical 1
2, the conductive portion 21 at the tip of the male electrode 20 is inserted into the female electrode 40,
The female electrode 40 is inserted into the seal member 13 held on the step 12a on the opening side of the cylindrical body 12. at first,
The male electrode 20 is inserted without contacting the female electrode 40, but when penetrating the louver 42 held on the inner peripheral surface, the male electrode 20 is electrically connected to the female electrode 40 via the louver 42. I do. Since the contact is made via the louver 42, the insertion resistance is small. On the other hand, when the female electrode 40 penetrates through the seal member 13, the female electrode 40
The seal member 13 is compressed and held between the inner peripheral surface of the cylindrical member and the inner peripheral surface of the cylindrical member 12 to form a water-like space inside the cylindrical body 12. Thus, the conductive portion 21 of the male electrode 20 and the louver 42, which is the conductive portion of the female electrode 40, are held in a space that is nectar to water from above.

When the upper case 30 is further pushed in, the female electrode 40 is inserted into the cylindrical body 12, and the internal pressure in the sealed space increases. However, since the O-ring 16 is mounted between the through-hole 11 and the male screw portion 23 and is hermetically sealed, the rise in the internal pressure does not affect the area below the panel. Conversely, since no rubber stopper is attached to the lower part of the panel, water may enter, but the O-ring 16 prevents the water from entering upward. Therefore, the conductive portion 21 of the male electrode 20 and the louver 42, which is the conductive portion of the female electrode 40, are maintained in a humid manner even when water is immersed from below. When the upper case 30 is sufficiently pushed into the lower case 10, the lock arm 33 formed on the outer surface of the upper case 30 is engaged with the wedge-shaped projection 19 formed on the outer surface of the lower case 10, and
Fixed.

As described above, the male electrode 20 penetrating the box-shaped lower case 10 has the O-ring 16 interposed between the male electrode 20 and the through hole 11 at the penetrating portion to prevent water from entering from below. The number of openings can be reduced as compared with the case where all the openings are closed with rubber stoppers, and a sealing space is formed above when the upper case 30 is put on, so that the O-ring 16 seals even if the internal pressure increases. Also, even when the opening is closed with a rubber stopper, it does not come off.

[Brief description of the drawings]

FIG. 1 is a perspective view of a power supply disconnector to which a waterproof structure according to an embodiment of the present invention is applied.

FIG. 2 is a sectional view of the power supply disconnector.

FIG. 3 is an enlarged sectional view of a waterproof structure.

FIG. 4 is an enlarged sectional view showing another embodiment of the waterproof structure.

FIG. 5 is a perspective view of a power cutoff to which a conventional waterproof structure is applied.

DESCRIPTION OF SYMBOLS 10 ... Lower case 11 ... Through-hole 12 ... Cylindrical body 13 ... Seal member 16 ... O-ring 17 ... Cylindrical part 20 ... Male side electrode 21 ... Conductive part 22 ... Flange part 23 ... Male screw part 30 ... Upper case 40: female side electrode 50: electric wire 60: fuse

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-5-217471 (JP, A) Japanese Utility Model Showa 56-70937 (JP, U) Japanese Utility Model Showa 57-133213 (JP, U) Japanese Utility Model Showa 55- 17226 (JP, U) Japanese Utility Model Showa 64-55531 (JP, U) Japanese Utility Model Showa 51-36233 (JP, Y1) Japanese Utility Model Utility Model 51-22270 (JP, Y1) Japanese Utility Model Showa 45-19702 (JP, Y1) (58) Field surveyed (Int.Cl. ⁷ , DB name) H01H 9/04 H01R 13/52 H01H 31/24 H01H 33/53 H01H 31/02

Claims (1)

(57) [Claims] 1. A box-shaped first housing is provided with a pair of electrodes erected through a panel of the housing, and a sealing member is provided in the penetrating portion, and a pair of electrodes is provided on the same pair of electrodes. On the other hand, a pair of electric wires are connected on the back side of the panel, and the second housing covering the first housing is provided with a short-circuit electrode for conducting between the pair of electrodes, and a conductive portion of the electrode is provided. A waterproof structure for a power cut-off, characterized by having a seal structure for holding airtightly.