JPH06151001A - Terminal locking structure for fuse box - Google Patents

Abstract

PURPOSE:To provide terminal locking structure for a fuse box, capable of dual locking of a terminal for a fuse by fixing a fuse holder. CONSTITUTION:In a fuse box, a flexible lock lance 10 is mounted on a partition wall 7 of a terminal containing chamber 2. A terminal 6 for a fuse is inserted into the terminal containing chamber 2 to be engaged with the flexible lock lance 10. A fuse terminal 12 is connected to the terminal for a fuse through an opening 3 of the terminal containing chamber 2. Flexible lock legs 19 each having a pawl 27 to be engaged with a lock step 18 of the terminal for a fuse and inserted through the opening 3 and a flexure inhibiting plate 21 inserted along the flexible lock lance 10 are provided in a fuse holder 5 abutting the end edge 4 of the opening 3. Furthermore, a temporary lock portion 28 and a main lock portion 29 with respect to the fuse box main body 1 are disposed in the flexure inhibiting plate 21.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fuse box terminal locking structure in which fuse terminals can be double locked by mounting a fuse holder.

[0002]

2. Description of the Related Art FIG. 6 is an exploded perspective view showing a terminal locking structure of a conventional fuse box described in Japanese Utility Model Publication No. 2-136420, and FIG. 7 is a longitudinal sectional view showing the terminal locking state. is there. In this structure, a fuse insertion portion 35 is provided on an upper wall 34 of a fuse box body 33 made of synthetic resin, and an opening 39 is formed in a side wall 36 of the box body 33 for inserting a locking spacer 38 for a fuse terminal 37. Is provided, the rear locking step 41 of the fuse terminal 37 is abutted and locked by the horizontal rod 40 of the spacer 38, and a flexible locking lance (not shown) provided in the box body 33 is provided for the terminal 37. The terminal is double-locked together with the engagement with the engagement window 42.

The spacer 38 is made of synthetic resin, has a locking projection 43 on the upper base of the horizontal rod 40, and is laterally inserted and engaged with the opening 39 of the box body 33. However, in the above conventional structure, the box body 33
In addition, the opening 39 for inserting the spacer and the insertion space for the horizontal rod 40 must be secured, which reduces the degree of freedom in design and restricts the arrangement of components in the box body 33. Also, insert the fuse 44 from above,
Since the spacer 38 is inserted from the side, there is also a problem that assembly by an automatic machine is difficult.

[0004]

SUMMARY OF THE INVENTION In view of the above-mentioned problems, the present invention reliably double-locks fuse terminals without providing an opening for inserting a spacer or a space for inserting a horizontal rod in the fuse box body. It is an object of the present invention to provide a fuse box terminal locking structure that can solve the problems of design freedom and automatic assembly.

[0005]

In order to achieve the above object, the present invention provides a flexible locking lance on a partition wall of a terminal accommodating chamber and inserts a fuse terminal into the terminal accommodating chamber. In a fuse box that engages with a locking lance and connects a fuse terminal from the opening of the terminal accommodating chamber to the fuse terminal, a fuse holder that abuts an edge of the opening,
A flexible locking leg having an engaging claw with respect to the locking step portion of the fuse terminal and inserted through the opening, and a flexure prevention plate inserted along the flexible locking lance are provided. It is based on.

[0006]

When the fuse holder is mounted, the flexible locking leg enters the inside of the terminal accommodating chamber through the opening and the engaging claw is engaged with the locking step portion of the fuse terminal. As a result, the fuse terminal is doubly locked together with the engagement of the flexible locking lance, and the withdrawal is prevented. The locking lance is pressed by the bending prevention plate to securely lock the fuse terminal. The fuse holder is held in the pulling direction by the terminal via the locking leg. When the fuse terminal is not completely inserted, the bending prevention plate contacts the locking lance to prevent the fuse holder from being inserted.

[0007]

1 is an exploded perspective view showing an embodiment of a terminal locking structure of a fuse box according to the present invention, FIG. 2 is a sectional view taken along the line A--A of FIG. Similarly FIG.
FIG. This structure includes a fuse box body 1 made of synthetic resin, a fuse holder 5 made of synthetic resin mounted in contact with an end edge 4 of an upper opening 3 of a terminal housing chamber 2 of the box body 1, and the terminal housing The fuse terminal 6 is inserted into the chamber 2 from below.

In the fuse box body 1, a plurality of pairs of terminal accommodating chambers 2 and 2 whose lower center is partitioned by a partition 7 are vertically provided so as to face the upper opening 3 of the accommodating chamber 2. A terminal stop projection 8 is provided on the upper end of the inner wall, and a pair of holder engaging projections 9, 9 are provided on the front and rear inner walls in the center of the accommodation chambers 2, 2.
Are provided facing each other. Further, a pair of flexible locking lances 10 and 10 are provided on the partition wall 7 so as to extend back to back, and each locking lance 10 faces the corresponding storage chamber 2.
a.

A fuse terminal 6 is inserted into the terminal accommodating chamber 2 from below (a lower opening (not shown)) and is locked to the locking lance 10. Further, the terminal 12 of the fuse 11 mounted on the fuse holder 5 is inserted from the upper opening 3 and connected to the fuse terminal 6.

The fuse terminal 6 has an engaging window 14 for the projection 10a of the locking lance 10 on the board portion 13, and a pair of standing plate portions 15, 15 which are erected on both sides of the board portion 13.
Is curled inward at the front end to form a pair of opposing elastic pieces 16, 16 in the center so that the fuse terminal 12 can be inserted from the front between the pair of elastic pieces 16, 16 and A pair of locking projection plates 17 and 17 are erected and connected to the rear half of the plate portions 15 and 15, and the rear end of the projection plate 17 is used as a locking step portion 18.

The locking step portion 18 is locked by the flexible locking leg 19 of the fuse holder 5. The fuse holder 5
Is a substantially rectangular box-shaped fuse holding portion 20, and the holding portion 20.
A pair of flexible locking legs 19 and 19 protrudingly formed on both sides of the bottom of the base plate, and a bending prevention plate 21 vertically provided at the center of the bottom.
It consists of and. The holding portion 20 has a fuse accommodating groove 22 at the center and a fuse terminal insertion opening 23 at the bottom,
Groove holes 24, 24 for unlocking the flexible locking legs 19, 19 are provided on the left and right inner side walls.

The pair of flexible locking legs 19 and 19 alternately project from the front center and the rear center of the bottom portion of the holding portion 20, and bend the knee portion 25 in a dogleg shape to make the shin portion 26 substantially. It is made to hang vertically, and a hook-shaped engaging claw 27 is formed so as to project outward from the tip of the shin 26, and the engaging claw 27 can bend in a direction opposite to the projecting direction. The engaging claw 27 engages with the locking step portion 18 of the fuse terminal 6 and prevents the terminal 6 from slipping backward together with the locking lance 10.

The bending prevention plate 21 can be inserted between the pair of flexible locking lances 10, 10 of the box main body 1, and the front and rear side portions thereof correspond to the pair of holder engaging projections 9, 9. A temporary locking claw 28 and a main locking claw 29 are provided. The temporary locking claw 28 is easily bent inward by a vertical slit 30 provided in the vicinity.

4 to 5 show a state in which the fuse holder 5 and the fuse terminals 6 are inserted. The fuse holder 5 is shown in FIG.
The flexible locking leg 19 is inserted thereinto, and the bending prevention plate 21 is advanced above the flexible locking lance 10 so that the temporary locking claw 28 of the bending prevention plate 21 can be passed over the one engagement projection 9. Then, the main locking claw 29 is brought into contact with the other engaging projection 9 to be held in the box body 1 in a temporarily locked state.

Next, as shown in FIG. 5, the fuse terminal 6 is inserted into the terminal accommodating chamber 2 from below, and the protrusion 1 of the locking lance 10 is inserted.
0a is engaged. When the holder 5 is pushed down in this state, the flexible locking leg 19 is flexibly inserted between the pair of projecting plates 17, 17 of the terminal 6, and the engaging claw 27 is inserted as shown in FIG. The locking step portion 18 at the rear end of the projecting plate 17 is restored and engaged.

In the fuse holder 5 shown in FIG. 3, the bottom portion of the holding portion 20 is brought into contact with the end edge 4 of the upper opening 3, and the flexible locking leg 19 is provided.
The engagement claw 27 strongly locks the fuse terminal 6 against the pulling force, and at the same time, the fuse 6 is securely locked by the pulling force. Therefore, the pawl 29 may be auxiliary.

[0017]

As described above, according to the present invention, the flexible locking legs of the fuse holder can lock the fuse terminals in the space of the terminal accommodating chamber of the fuse box. No unnecessary space is required for this, and moreover, the degree of freedom in design is increased, and the parts can be arranged in the box without any restrictions. In addition, the bending prevention plate of the fuse holder can detect incomplete insertion of the fuse terminal, and can achieve reliable double locking of the terminal. Further, since the fuse holder is inserted and attached in the vertical direction similarly to the insertion of the fuse terminals, the assembly by an automatic machine is possible.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing an embodiment of a terminal locking structure of a fuse box according to the present invention.

FIG. 2 is a cross-sectional view taken along the line AA of FIG. 1, also showing the assembled state.

FIG. 3 is a sectional view taken along line BB of FIG.

FIG. 4 is a view showing a state in which a fuse holder is temporarily locked.
2 is a vertical cross-sectional view corresponding to BB.

FIG. 5 is a vertical cross-sectional view showing a state in which fuse terminals are also inserted and the fuse holder is finally locked.

FIG. 6 is an exploded perspective view showing a conventional example.

FIG. 7 is a vertical cross-sectional view showing the assembled state of the same.

[Explanation of symbols]

 1 Fuse Box Main Body 2 Terminal Housing 3 Upper Opening 4 Edge 5 Fuse Holder 6 Fuse Terminal 7 Partition 9 Engagement Protrusion 10 Flexible Locking Lance 12 Fuse Terminal 18 Locking Step 19 Flexible Locking Leg 21 Bending Prevention Plate 27 Engaging claw 28 Temporary locking claw 29 Regular locking claw

Claims (2)

[Claims] 1. A flexible locking lance is provided on a partition wall of the terminal accommodating chamber, a fuse terminal is inserted into the terminal accommodating chamber and engaged with the flexible locking lance, and a fuse terminal is provided in the terminal accommodating chamber. In a fuse box that is connected to the fuse terminal from the opening, a fuse holder that abuts an edge of the opening,
A flexible locking leg having an engaging claw with respect to the locking step portion of the fuse terminal and inserted through the opening, and a flexure prevention plate inserted along the flexible locking lance are provided. Fuse box terminal locking structure. 2. The terminal locking structure for a fuse box according to claim 1, wherein the bending prevention plate is provided with a temporary locking portion and a main locking portion for the fuse box body.