JP2007328966A - Protective cover - Google Patents

Abstract

In a protective cover for covering an electrical connection portion for fastening terminals to each other with bolts and nuts, the base portion and a cap portion can be securely coupled to each other.
A terminal protection cover made of insulating resin, which is connected to a base portion having an annular peripheral wall disposed on an outer periphery of the terminal block, and a part of the peripheral wall of the base portion via a thin hinge, The lock includes a cap part that covers the electrical connection part, and includes a lock part and a locked part that lock each other between the peripheral wall of the base part and the peripheral wall of the cap part, and the lock on the inner peripheral surface of the peripheral wall of the base part A rib is projected in a region sandwiching the position where the portion is provided, and the rib does not protrude to a position where it comes into contact with the terminal and protrudes to a position where it can be abutted and locked to the outer peripheral edge of the terminal block, The rib is supported by a terminal block when locked with the cap portion.
[Selection] Figure 2

Description

  The present invention relates to a protective cover, and more specifically, in a protective cover including a base portion and a cap portion that covers a portion where terminals are electrically connected with bolts and nuts, the base portion is lock-coupled when the cap portion is closed.

  Conventionally, the connection between the bus bar in the electrical connection box and the terminal connected to the power line terminal is such that the bolt shaft protrudes through the bus bar arranged on the upper surface of the electrical connection box, while the terminal is a holed terminal, After passing the bolt shaft through the terminal hole from above, the nut is fastened and electrically connected. Since this electrical connection portion is exposed on the upper surface of the electrical connection box, it is covered with a protective cover as disclosed in JP-A-2006-60877.

Specifically, as shown in FIGS. 6A and 6B, a bus bar connecting portion 2 is arranged on the upper surface 1a of the electrical connection box 1, and a bolt shaft 2a is projected upward from the bus bar connecting portion 2. On the other hand, a protective material 5 is provided through which the power line 4 having the terminal 3 with a hole connected to the terminal is inserted, and a protective cover 6 composed of a base portion 6a and a cap portion 6b surrounding the terminal 3 is integrally formed at the distal end portion of the protective material 5. Provided.
The protective cover 6 has a base portion 6a arranged at the outer peripheral position of the bolt shaft 2a of the electrical connection portion, and after a nut N is fastened to the bolt shaft 2a, the cap portion 6b is put on the base portion 6a to lock the base portion 6a. The lock portion 6b-1 of the cap portion 6b is lock-coupled to the portion 6a-1.

JP 2006-60877 A

When the lower surface of the peripheral wall of the base portion 6a of the protective cover 6 can be firmly brought into contact with the upper surface 1a of the electrical junction box 1, the lock portion 6b-1 of the cap portion 6b is fitted into the lock portion 6a-1 of the base portion 6a. During the locking operation, the locking portion 6a-1 on the side of the base portion 6a can be prevented from escaping and securely locked.
However, the protective cover 6 is formed integrally with the power supply line and the tip of the protective guide portion 5a of the terminal 3 so that the protective guide portion 5a extends along the outer surface of the electrical connection box 1. There are cases where it floats. In this case, since the base portion 6a is in a state where the lower surface of the peripheral wall is not supported, there is a possibility that the base portion 6a escapes and is semi-fitted when locked with the cap portion 6b.

Further, as shown in FIG. 7, a terminal 9 having a bolt shaft 8 protruding from the center of one end face of the cylindrical case 7 is fixed, and the bolt shaft 8 is passed through a hole of a terminal 3 ′ with a round hole in a power line terminal. After fastening with the nut N, the electrical connection portion may be protected by the protective cover 6 '.
In this case, the annular base portion 6a ′ of the protective cover 6 ′ is loosely fitted to the outer peripheral surface of the case 7, and the base portion 6a ′ is covered with the cap portion 6b ′, and the lock claw 6a′-1 of the base portion 6a ′ is capped. The locking claw 6a′-1 escapes into the gap C between the outer peripheral surface of the case 7 and the base portion 6a ′ and is half-fitted. This results in a problem that the protective cover is not easily mounted.

  The present invention has been made in view of the above problems, and even when the base portion of the terminal protection cover is difficult to be stably supported, it is ensured that the base portion is secured when the cap portion is put on the base portion and locked. It is an object to eliminate the escape and prevent a half-fitted state and ensure a lock.

In order to solve the above-mentioned problem, the present invention fixes a terminal having a bolt shaft portion protruding from the center on a circular terminal block made of an insulating resin, and the bolt shaft portion is passed through a hole of a mating hole terminal. A terminal protection cover made of insulating resin that protects the electrical connection part that is fastened and fixed with a nut,
A base having an annular peripheral wall disposed on the outer periphery of the terminal block;
It is connected with a part of the peripheral wall of the base part through a thin hinge, and comprises a cap part that covers the electrical connection part,
A lock part and a locked part that lock each other between the peripheral wall of the base part and the peripheral wall of the cap part,
A rib is protruded in a region sandwiched between positions where the lock portion is provided on the inner peripheral surface of the peripheral wall of the base portion, and the rib does not contact with the terminal until it can be abutted and locked to the outer peripheral edge of the terminal block. A protective cover is provided that protrudes and is configured to support the rib with a terminal block when locked with the cap portion.

  As described above, if the rib that can contact the outer peripheral edge of the terminal block protrudes from the inner surface of the annular peripheral wall of the base of the protective cover, the base can be supported by the terminal block, and the base and the cap are locked. When coupled, the lock portion on the base side can be securely coupled without causing escape.

In particular, the terminal fixed on the terminal block is a terminal fixed on the terminal block provided on one end face of the DC / DC converter case, and the bolt shaft portion protruding from the center of the terminal is connected to the power supply post. While
The terminal with the hole is formed by projecting the tip of the bus bar accommodated in the case made of insulating resin refracted from the case,
The protective cap of the present invention is preferably used when the cap portion and the base portion are refracted to one end side of the case of the bus bar and provided by integral molding, and the terminal with hole is accommodated inside the base portion. .
That is, when the terminals of the DC / DC converter and the terminals of the power supply circuit are electrically connected by bolting, it is necessary to cover the electrical connection portion with the protective cover, and thus the protective cover of the present invention can be suitably used.

  As described above, according to the protective cover of the present invention, the rib provided on the base can be brought into contact with the terminal block at the time of lock coupling between the base and the cap connected via the thin hinge portion. When the base portion and the cap portion are lock-coupled, the base-side lock portion can be securely coupled without causing escape.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
In this embodiment, as shown in FIG. 1, a bolt shaft protruding from a terminal of a DC / DC converter 10 mounted on a hybrid vehicle, and a terminal with a round hole formed at the tip of a power bus bar are bolts and nuts. The electrical connection portion is covered and protected by a protective cover 20 that is integrally provided at the tip of the resin case 15 containing the power bus bar.

  The DC / DC converter 10 is placed horizontally, and as shown in FIG. 2, a disk-shaped resin terminal block 11 is provided on the right end surface in the figure, and a terminal 12 is fixed to the center of the terminal block 11, A bolt shaft (power supply post) 13 is projected from the center of the terminal 12.

  As shown in FIGS. 3 and 4, the power circuit bus bar 14 has an elongated shape and is accommodated in a case 15 made of an insulating resin, and a power supply side terminal 16 with a round hole is refracted from one end thereof to project. Yes. The power supply side terminal 16 has a hole 16a through which the bolt shaft 13 on the DC / DC converter 10 side is inserted, and is electrically connected by screwing and fixing a nut N with the bolt shaft 13 inserted into the hole 16a. It is.

  A protective cover 20 protrudes from one end of the case 15 to protect the electrical connection portion. The protective cover 20 has a structure in which a base portion 21 and a cap portion 22 are connected to each other through a thin hinge portion 23 so as to be openable and closable. The base portion 21 protrudes laterally from the tip of the case 15. The power supply side terminal 16 is accommodated in the housing.

The cap portion 22 includes an annular peripheral wall 22a and a dome-shaped closing portion 22c continuous to one end of the peripheral wall 22a, and a part of the peripheral wall 22a is interposed between the thin hinge 23 and the base 21. It is connected to a part of the annular wall 21a. A lock frame 22b is provided on the peripheral wall 22a at a position facing the connecting portion by the thin hinge portion 23.
On the other hand, a lock claw 21b is provided on the peripheral wall 21a of the base portion 21 at a position facing the lock frame 22b. When the cap portion 22 is rotated around the thin hinge portion 23 and covered with the base portion 21, the lock claw 21b is provided. The lock frame 22b is inserted and locked to be locked.

  As shown in FIG. 2, a rib 21c having a substantially semicircular shape protrudes from the inner surface of the peripheral wall 21a on the side where the lock claw 21b is protruded. The rib 21c extends to a position where it does not come into contact with the power supply side terminal 16 accommodated therein. Further, in the state where the terminal 12 and the power supply side terminal 16 are overlapped with each other through the bolt shaft 13 on the DC / DC converter 10 side in the hole 16a of the power supply side terminal 16, the peripheral wall 21a of the base portion 21 is a terminal as shown in FIG. The rib 21 c is positioned on the outer periphery of the terminal block 11 so that a gap is provided on the outer periphery of the terminal block 11. Although the rib 21c is provided with the thinned portion 21c-1, the thinned portion may not be provided.

  In the above configuration, as shown in FIG. 5, the terminals 12 and 16 are overlapped, and the nut N is fastened and electrically connected to the bolt shaft 13 protruding from the terminals 12 and 16, and then the cap portion 22 of the protective cover 20. And the peripheral wall 22a of the cap portion 22 is externally fitted to the peripheral wall 21a of the base portion 21. During the external fitting operation, the lock claw 21 b of the peripheral wall 21 a of the base portion 21 is inserted and locked into the lock frame 22 b of the peripheral wall 22 a of the cap portion 22, so that the cap portion 22 is locked to the base portion 21.

  Since the rib 21c of the base portion 21 abuts against the terminal block 11 and is firmly supported at the time of the lock coupling, even if the lock frame 22b of the cap portion 22 is pushed into the lock claw 21b, the lock claw 21b There is no escape, and the lock connection is made securely, and it is possible to prevent half-fitting.

  In this way, when the cap portion 22 is locked to the base portion 21 of the protective cover 20, the base portion 21 is provided with the rib 21c, so that the lock connection can be reliably performed, and the fitting property at the time of fitting is improved. be able to.

It is a perspective view which shows embodiment of this invention. FIG. 1 is a drawing showing the relationship between the base of the protective cover and the terminal block on the DC / DC converter side. It is a perspective view of the case which provided the protective cover and accommodated the bus bar for power supplies. It is a front view of the case. It is sectional drawing of the state which set the protective cover to the terminal block. (A) (B) is drawing which shows a prior art example. It is drawing which shows another prior art example.

Explanation of symbols

10 DC / DC converter 11 Terminal block 12 Terminal 13 Bolt shaft 14 Bus bar for power supply circuit 15 Case 16 Power supply side terminal (terminal with hole)
20 Protective cover 21 Base 21a Perimeter wall 21b Lock claw
21c rib 22 cap part 22a peripheral wall 22b lock frame N nut

Claims (2)

An electrical connection part in which a terminal with a bolt shaft protruding from the center is fixed on a circular terminal block made of insulating resin, and the bolt shaft is passed through the hole of the other holed terminal and fastened with a nut A terminal protective cover made of insulating resin to protect
A base having an annular peripheral wall disposed on the outer periphery of the terminal block;
It is connected with a part of the peripheral wall of the base part through a thin hinge, and comprises a cap part that covers the electrical connection part,
A lock part and a locked part that lock each other between the peripheral wall of the base part and the peripheral wall of the cap part,
A rib is protruded in a region sandwiched between positions where the lock portion is provided on the inner peripheral surface of the peripheral wall of the base portion, and the rib does not contact with the terminal until it can be abutted and locked to the outer peripheral edge of the terminal block. A protective cover that protrudes and supports the rib with a terminal block when locked with the cap portion. The terminal fixed on the terminal block is a terminal fixed on the terminal block provided on one end face of the DC / DC converter case, and the bolt shaft portion protruding from the center of the terminal is formed of a power supply post. ,
The terminal with a hole is formed by projecting the front end of a bus bar accommodated in a case made of insulating resin refracted from the case,
2. The protective cover according to claim 1, wherein the cap part and the base part are refracted to one end side of the case of the bus bar and are integrally formed, and the terminal with a hole is accommodated in the base part.

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