JPH0357070Y2 - - Google Patents

Description

[Detailed description of the invention] Purpose of the invention [Industrial field of application] The invention is an improvement of the fixing structure between a busbar and its insulating support plate in a busbar wiring board or branch connector that constitutes the internal circuit of an electrical connection box. Regarding.

[Conventional technology and its problems]

As a fixing structure between a bus bar and an insulating support plate, Japanese Utility Model Application No. 54-148899 discloses that a hole is made in a bus bar that is an electric conductor, a boss provided on an insulating plate is inserted (press-fitted) into the hole, and a bus bar and an insulating support plate are fixed. Discloses a technique for joining insulating plates.

To explain this in detail with reference to the drawings, in Figs. 6 and 7, a is a bus bar provided with a hole b, and d is an insulating plate with a protruding boss e, which has a diameter larger than the inner diameter of the hole b. By press-fitting the boss e, the bus bar a and the insulating plate d are joined and fixed. At that time, the outer periphery of the synthetic resin boss e is scraped by the metal bus bar a, and the scraps f accumulate between the bus bar and the insulating plate, creating a gap v.
The problem is that as the press-fitting depth becomes shallower, not only does the holding force against the busbar decrease, but also the position and dimensions of the tab-shaped connector terminals C connected to the busbar become uneven, making them unstable. It was becoming.

The purpose of this invention is to solve the above-mentioned problems, and to prevent the formation of gaps due to shavings between the bus bar and the insulating support plate when the boss is applied to the pressure, the press-fit depth is constant, and the bus bar and the insulating support plate are stable in position and dimension. The purpose is to provide a fixed structure.

Structure of the invention [Means and effects for solving the problems] In order to achieve the above-mentioned object, the present invention provides a hole in a bus bar which is an electric conductor, a boss provided protrudingly on an insulating support plate for the bus bar, and a hole in the bus bar which is an electric conductor. In the structure in which the busbar is fixed to the insulating support plate by press-fitting the boss into the hole, a groove is provided around the base end of the boss, and the shavings generated when the boss is press-fitted are stored in this groove. do.

According to the present invention, the shavings generated when the boss is press-fitted fall along the outer periphery of the boss and are stored in the groove of the insulating support plate provided on the outer periphery of the base end of the boss.
There is no gap between the bus bar and the insulating support plate due to being sandwiched between them, the press-fit depth is constant, and the holding force and positional and dimensional relationship are stabilized.

〔Example〕

1 and 2, A indicates a branch connector, which consists of a multi-polar branch terminal 1, a plurality of female terminals 8 connected to this, and an insulating housing 16 that accommodates these. is fixed to a plastic holder 5.

The branch terminal 1 is formed by connecting a plurality of tab-shaped terminal portions 3 at predetermined intervals on both sides of a common conductive plate 2, and has a U-shaped cross section. The common conductive plate 2 is provided with a hole 4 corresponding to each terminal portion 3, and a boss 6 with a slightly larger diameter than the inner diameter of each hole 4 is provided on the inner surface of the holder 5, and a boss 6 is provided on the outer periphery of the base end thereof. An annular groove 7 is provided. A chamfer 6a for a press-fit guide is provided at the tip of the boss 6. In addition, stoppers 3a for the female terminals 8 are provided on both sides of the intermediate portion of each terminal portion 3, and lock claws 5a for the insulating housing 16 are provided on both left and right sides of the holder 5.

The branch terminal 1 and the holder 5 are fixed as shown in Fig. 3a and b.
This is done by press-fitting the boss 6 into the hole 4 of the common conductive plate 2, as shown in FIG. Therefore,
There is no shavings 6' caught between the common conductive plate 2 and the holder 5 as in the conventional case, the height of the terminal portion 3 from the holder surface remains constant, and the holding force is stabilized.

The female terminal 8 has an electric contact portion 8A for the tab-shaped terminal portion 3 on one side of the substrate portion 9, and an electric wire connection portion 8B on the other side. Insulator caulking pieces 11 are provided oppositely. In the electrical contact section 8A, the upright side walls 12 on both sides of the base plate extending on the opposite side from the conductor clamping piece 10 are curled inwardly to form elastic clamping arms 13, and the conductor clamping piece is attached from the base plate part 9. A locking piece 14 is cut out and extends obliquely toward the base plate 9, and a protruding portion 15 facing the elastic clamping arm 13 is provided on the base plate portion 9.

The insulating housing 16 has a hood-like cross section in which a box-shaped main body 16a is connected to an enlarged part 16c via an inclined part 16b, and has a central partition wall 1 inside.
A plurality of terminal accommodating chambers 17 are defined by partition walls 16e orthogonal to 6d. Each storage room 17
A locking groove 18 that engages with the locking piece 14 is recessed in the inner wall of the main body, and a holder storage chamber 19 is formed by cutting out the center of each partition wall 16e, and a holder storage chamber 19 is formed in the center of each partition wall 16e. Lock hole 2 in the end wall
A lock chamber 20 having a diameter 0a is formed in a bulging manner.

The branch connector is assembled as follows.

As shown in FIG. 2, the female terminal 8 to which the electric wire 21 is connected is inserted into each terminal accommodating chamber 17 of the insulating housing 16, and the locking piece 14 is engaged with the locking groove 18 to lock the female terminal 8. Next, when the holder 5 is pressurized from the holder storage chamber 19, each terminal portion 3 is attached to the elastic clamping arm 13.
and the base plate 9, and a stopper 3a is attached to the arm 13.
When it makes contact, the approach stops. At the same time, the holder 5 is locked to the insulating housing 16 by the engagement of the lock claw 5a with the lock hole 20a.

In this way, a plurality of female terminals 8 are connected to one or two
It is branch-connected to more than one branch terminal 1. The number of branched poles can be freely changed by cutting and separating the common conductive plate 2 as necessary.

When pressurizing the holder 5, since the heights of the terminal portions 3 of each branch terminal 1 from the holder surface are all the same as described above (Fig. 3 a, b), it is difficult to fit the female terminal 8. The joining depth is also constant, and a stable electrical connection state can be obtained.

Figures 4 and 5 show other embodiments of the invention. In the figure, 22, 22', 22'' are bus bars formed by punching and bending thin sheet metal, and have a desired pattern according to the circuit configuration, and the end or middle part E has a tab shape. connection terminal 23 is on top,
Each bus bar is provided with one or more holes 24, which are connected to each other by standing upright below.
25 is an insulating substrate, with holes 2 on both the front and back sides.
4, a boss 26 is provided protrudingly provided, and an annular groove 27 is provided on the outer periphery of the proximal end thereof.

These bus bars 22, 22', 22'' are fixed to the insulating substrate 25 by press-fitting the bosses 26 into the holes 24 in the same manner as described above, and the generated shavings are accommodated in the grooves 27. The height of the connection terminals 23 from the insulating board surface is kept constant.Furthermore, since the busbar and insulating board are closely fixed, there is no wobbling or distortion when stacking these busbar wiring boards in multiple layers. Does not occur.

Effects of the invention As explained above, according to the invention, an insulating substrate serving as an insulating support plate or a boss protruding from a holder is press-fitted into a hole provided on a busbar serving as a common conductive plate for a busbar or a branch terminal. Since the shavings generated during the process can be stored in the groove provided on the outer periphery of the base end of the boss, there is no gap between the busbar and the insulating support plate, and the depth of press-fit is constant, which improves the holding force and positional dimension. It also stabilizes.

[Brief explanation of the drawing]

Figure 1 is an exploded perspective view of a branch connector to which the present invention is applied, Figure 2 is an assembled sectional view of the branch connector in Figure 1, and Figures 3a and b are before the branch terminal and holder are press-fitted and fixed in Figure 1. 4 and 5 are respectively a plan view (FIG. 4) and a sectional view of the main parts of a busbar wiring board showing other application examples of the present invention. Figure (Figure 5),
FIGS. 6 and 7 are a plan view (FIG. 6) and a sectional view (FIG. 7) of a main part of a busbar wiring board showing a conventional example, respectively. 1... Branch terminal, 2... (as a bus bar)
Common conductive plate, 4...hole, 5...holder (as an insulating support plate), 6...boss, 7...groove, 22,2
2', 22''...bus bar, 24...you, 25...
...Insulating substrate, 26...Boss, 27...Groove.

Claims (1)

[Scope of utility model registration request] In a structure in which a hole is drilled in a bus bar forming an electric conductor, a boss is provided protruding from an insulating support plate for the bus bar, and the boss is press-fitted into the hole to fix the bus bar to the insulating support plate, the area around the base end of the boss is A fixing structure for a bus bar and an insulating support plate, characterized in that a groove is provided in the groove, and the shavings generated when press-fitting the boss are stored in the groove.