JPH0329891Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial field of application] The present invention prevents terminal fittings inserted into terminal housing chambers from falling out later in electrical connection boxes used in wire harnesses. The present invention relates to a terminal locking device that is coupled to the electrical connection box or the like.

[Conventional technology]

For locking the terminal fitting inserted into the terminal accommodating chamber of the connector housing, a flexible locking arm is integrally provided on the inner wall of the terminal accommodating chamber, and the flexible locking arm is inserted into the terminal accommodating chamber. Generally, the terminal fitting is engaged with the terminal fitting to prevent the terminal fitting from coming off later, but recently, a terminal locking device is combined with the rear part of the connector housing, and the terminal fitting is engaged with the flexible locking arm or A device has been proposed in which the terminal locking device is used in place of the flexible locking arm to ensure that the terminal fitting is prevented from coming off.

4 to 8 show conventional examples of such a locking structure, in which a cover B is removably provided on the electrical junction box body A, and a locking claw B ₁
to the protrusion _A1 and fix it. A connector housing B ₂ for attaching a fuse is integrally erected on the outer surface of the cover B, and a terminal locking tool C is fitted into the connector housing B ₂ from the inner surface thereof.

As shown in Figure 5, the connector housing
A plurality of terminal accommodating chambers 1 are arranged in parallel inside _B2 .
The terminal locking device C extends forward of a frame-shaped main body portion 4 having an insertion portion 3 through which a terminal fitting and an electric wire connected thereto can be inserted, and has a plurality of terminal holding chambers 1 corresponding to the plurality of terminal accommodating chambers 1. A flexible locking piece 5 is provided in a protruding manner, and locking arms 6 for locking the connector housing B ₂ are also provided on both sides and extending forward.
are installed in succession.

The lock arm 6 includes a pair of vertically flexible pieces 6a, 6a arranged vertically in parallel with a gap 6c in between, and a pair of vertically flexible pieces 6a, 6a which face the gap 6c on the sides of the vertically flexible pieces 6a, 6a, and which are opposite to the gap 6c. It has a horizontally flexible piece 6b that is provided so as to be able to go in and out, and a vertically flexible piece 6a.
A temporary locking protrusion 6a ₁ is protruded from the horizontally flexible piece 6b, and a permanent locking protrusion 6b 1 is provided protruding from the horizontally flexible piece 6b at a position rearward from the temporary locking protrusion _{6a 1 .}

A bulging wall 8 is provided at the rear of both side walls 7 of the connector housing _B2 , and a receiving part 9 for the lock arm 6 is formed. A locking portion 8a for the temporary locking projection 6a ₁ is formed, and a locking portion 8b for the main locking projection 6b ₁ is formed on the side surface of the bulging wall 8 in front of the locking portion 8a. There is.

In the above, the connector housing B ₂ and the terminal locking tool C are connected to the seventh terminal before the terminal fitting is inserted.
As shown in the figure, the temporary locking protrusion _6a1 of the vertically flexible piece 6a is in a temporarily connected state in which it is engaged with the locking part 8a in the receiving part 9, and in this state, the terminal connected to the electric wire The metal fitting is inserted into the terminal accommodating chamber 1 through the insertion portion 3 of the terminal locking tool C and engaged with the flexible locking arm.

Next, as shown in Fig. 8, the terminal locking tool C is pushed into the connector housing _B2 , and the final locking protrusion _6b1 of the lock arm 6 is engaged with the locking part 8b in the receiving part 9, thereby making the final connection. In this state, the flexible locking piece 5 is brought close to the position where it engages with the terminal fitting, and double locking is performed to prevent the terminal fitting from coming off later.

During the above-mentioned temporary connection and final connection, the vertically flexible pieces 6a, 6a are flexibly displaced through the interval 6c,
The horizontal flexible piece 6b also flexibly displaces while entering the space 6c.

[The problem that the idea attempts to solve]

In the above-mentioned conventional technology, since the amount of movement of the terminal lock C from the temporarily connected state to the fully connected state is small, it is easy for an operator to misunderstand the fully connected state visually, and the cover There was a problem that confirmation could not be made when B was assembled to the electrical connection box body A.

The present invention focuses on the above-mentioned points, and makes it possible to confirm the final connection state of the terminal locking tool using a jig instead of visually checking.

[Means to solve the problem]

In order to achieve the above object, the present invention provides a connector housing with a terminal locking tool for a terminal fitting and moves the terminal locking tool from a temporary locking state to a fully locking state, in which the connector housing An insertion hole for a jig for detecting a fitted state is formed at a position close to the terminal locking device, and a receiving portion for the detection jig is formed in the terminal locking device to extend to a position opposite to the insertion hole. It was adopted.

〔Example〕

In Figure 1, A' is the electrical junction box body;
A cover B' is removably provided, and is fixed by engaging a locking pawl _B1 ' with a protrusion _A1 '.

A connector housing B ₂ ′ for attaching a fuse is integrally erected on the outer surface of the cover B ′, and a terminal locking tool C ′ is fitted into the connector housing B ₂ ′ from the inner surface thereof.

The terminal locking tool C' has an insertion part in the frame-shaped main body 4' through which the terminal metal fitting and the electric wire connected thereto can be inserted inside, as in the conventional example,
It has a flexible locking piece 5' that extends forward and engages with the terminal fitting D in the terminal receiving chamber 1' of the connector housing _B2 '.

A lock arm 6' is installed upright on the terminal locking tool C'.
A temporary locking protrusion 6a1' is provided on the vertically flexible piece _6a ', and a permanent locking protrusion 6 is provided on the horizontally flexible piece 6b'.
b ₁ ′ protrudes from the locking portions 8 a ′ and 8 at the receiving portion 9 ′ in the bulging wall 8 ′ of the connector housing B ₂ ′.
b′ separately.

In the cover B', an insertion hole for the fitting _state detection jig E is provided in a part of the main plate part _B3 ' having the connector housing B2' close to the connector housing _B2 '.
_B4 ' is formed in the terminal locking tool C', and a receiving part _C1 ' for the detection jig E is formed in the frame-shaped main body part 4' extending to a position opposite to the insertion hole _B4 '. has been done.

In the above configuration, when the terminal locking tool C' is in the temporarily locked state, the detection jig E is placed at E ₁ with respect to the insertion hole B ₄ '.
The detection jig E is inserted up to the point _E2 and the insertion depth is l1 (Fig. 2 A), while the detection jig E is inserted up to the point _E2 in the fully locked state of the terminal locking tool C'. The insertion depth changes to _l2 (FIG. 2b), and the correct assembly state can be detected from this depth _l2 .

〔effect〕

As described above, the present invention provides a terminal locking tool for a terminal fitting on a connector housing and moves the terminal locking tool from a temporary locking state to a fully locking state, in which the terminal locking tool is moved from a temporary locking state to a fully locking state, and the The connector has an insertion hole for the detection jig in the mated state, and the terminal locking tool has a receiving part for the detection jig that extends to a position opposite to the insertion hole. The fitting state for locking the terminal to the housing can be reliably inspected.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing an electrical connection box according to an embodiment of the present invention, FIG. B indicates the final locking position of the terminal locking tool.
Fig. 3 is another sectional view of the terminal locking device moved to the final locking position, Fig. 4 is a perspective view of a conventional electrical junction box, and Fig. 5 is a conventional terminal locking device and connector housing. FIG. 6 is an enlarged perspective view of the same terminal locking device as above; FIG. 7 is a partially cutaway side view showing a state in which the lock arm of the terminal locking device is temporarily locked to the connector housing; FIG. The figure is a partially cutaway side view showing the state in which the locking arm of the terminal locking tool is fully locked to the connector housing. B ₂ ′...Connector housing, C'...Terminal locking tool, D...Terminal metal fitting, B ₄ '...Detection jig insertion hole, E...Detection jig, C ₁ '...Receptacle Department.

Claims (1)

[Scope of utility model registration request] A jig for detecting a mating state at a position close to the connector housing in a connector housing that is provided with a terminal locking tool for a terminal fitting and moving the terminal locking tool from a temporary locking state to a fully locking state. Detecting the fitted state of a terminal locking tool, characterized in that the terminal locking tool has a receiving part for the detection jig that extends to a position opposite to the insertion hole. structure.