JPH09320649A - Wiring board - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily adjust the intervals between the connecting terminal parts of pressure contact terminals to the narrow intervals between mating connectors while keeping sufficient insulating intervals, when the pressure contact terminals for connection to wires are aligned on a wiring board or a connector. SOLUTION: This wiring board comprises a plurality of pressure contact terminals 3, 3', each having a connecting terminal part 4, 4' at one end and a pressure contact part 5 for wire at the other, and an insulating plate (upper case 1) by which the pressure contact terminals are supported while connecting terminal parts project from its plate surface at predetermined intervals. The plurality of pressure contact terminals 3, 3' comprise a flat pressure contact terminal 3 where the pressure contact part 5 is flush with the connecting terminal parts 4, 4' and a stepped pressure contact terminal 3' where the connecting terminal part 4' is cranked (9) relative to the pressure contact part 5 while leaving behind a spacer part 8 that is flush with the pressure contact part 5.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a wiring board suitable for an electric connection box such as a branch connection box, which uses an electric wire and a pressure contact terminal for a circuit configuration.

[0002]

2. Description of the Related Art In an electric junction box whose internal circuit is composed of electric wires
In many cases, pressure contact terminals are used to connect the electric wires. Figure
As shown in Fig. 7 (A), the pressure contact terminal a is a slot for wire pressure contact.
B ₁Tab-shaped with a narrow width against the wide pressure contact part b
It has a basic structure in which the connection terminal part c of
The terminal portion c is connected to an external connector (not shown).

The tabs c of the pressure contact terminals a are arranged at the same pitch as the terminal pitch of the external connector. Therefore, the tab pitch (terminal pitch of the connector) is small for a small power connector having a small connector (or terminal) size, and when the press contact terminals a are arranged in accordance with the tab pitch p, the press contact portion b is formed as shown in the figure. Cannot be placed due to interference or contact. In order to avoid this interference, as shown in FIG. 7B, a pressure contact terminal a ′ having a plurality of tabs c for one pressure contact portion b.
Has also been devised. However, when it is not necessary to take out a plurality of tabs c from one electric wire, that is, when a joint is not required in the circuit, the tab c ₁ shown by the diagonal lines is cut. Therefore, a connector having an unnecessarily large number of poles is formed, and the electric junction box becomes large.

As another means, as shown in FIG. 7 (C), a crank bending portion d is formed at the lower end of the wide pressure contact portion b '.
It is conceivable to provide a step between the tab c'and the pressure contact portion b '. The reason why the wide press-contact portion b'is bent is to ensure good seating and terminal strength when press-fitting and fixing the press-contact terminal a "to an insulating substrate. In this case, the tabs c and c'are secured. Even if the pitch p between the centers is the same as that of the tab c in Fig. 7 (A), there is no interference between the adjacent pressure contact portions b and b'.However, the distance e between the tab c and the crank bent portion d is eliminated.
Is much smaller than the pitch p, so that the insulation between the adjacent pressure contact terminals a and a ″ will be insufficient.

In Japanese Patent Laid-Open No. 63-318080, an upper and lower two-layer structure of an upper pressure contact layer and a lower pressure contact layer is used by using a pressure contact portion of a pressure contact terminal and a tab which are displaced in the X and Y directions. Is disclosed. According to this, interference between adjacent pressure contact terminals and interference between electric wires can be avoided, but since the pressure contact terminals are also fixed in two upper and lower layers, it is inevitable that they become bulky. There is a problem that the pressure contact terminal itself tends to increase in size due to the displacement in the XY directions.

[0006]

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and it is easy to match the narrow terminal pitch of the external connector on the mating side, and wiring can be performed in a single layer. An object is to provide a wiring board suitable for miniaturization.

[0007]

In order to achieve the above-mentioned object, the present invention, as set forth in claim 1, has a plurality of press-connecting parts each having a connecting terminal part at one end and an electric wire press-connecting part at the other end. The terminal and an insulating plate that supports these pressure contact terminals in a state where the connection terminal portions project from the plate surface at a predetermined pitch, and the plurality of pressure contact terminals have the pressure contact portion and the connection terminal portion flush with each other. The flat type pressure contact terminal and the stepped pressure contact terminal in which the connection terminal portion is crank-bent with the spacer portion flush with the pressure contact portion are alternately arranged and fixed. The stepped pressure contact terminal has a simple structure in which the connection terminal portion of the flat pressure contact terminal is crank-bent while leaving the spacer portion, whereby the pressure contact portion and the connection terminal portion are displaced in one direction of the X or Y axis. It is easy to manufacture, and it is almost the same size as the flat type pressure contact terminal itself, and the presence of the spacer section ensures a sufficient insulation distance between adjacent flat type pressure contact terminals, and interference between the pressure contact portions and wires due to the alternate arrangement. Can be avoided.

According to a second aspect of the present invention, the flat type pressure contact terminal and the stepped pressure contact terminal are integrally fixed to the insulating plate by insert molding. A wiring structure can be easily achieved. According to the invention of claim 3, at least one of the flat type pressure contact terminal and the stepped pressure contact terminal has its rising base portion insulated by an enclosing wall. Insulation between terminals can be secured.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Specific examples of the embodiments of the present invention will be described below with reference to the drawings. 1 and 2, reference numeral 1 denotes an upper case of an electric connection box, and a connector receiver 2 for an external connector (not shown) is provided upright on the outer surface of the case. In the connector receiver 2, tabs 4 and 4'which are connection terminal portions of the pressure contact terminals 3 and 3'are arranged and fixed at a predetermined pitch P, and the pressure contact portions 5, 5'at the pressure contact terminals 3, 3'inside the case. An electric wire 7 is pressure-connected to the slots 6 and 6'to form a desired circuit.

As shown in FIG. 3, the press-connecting terminal 3 has a wide press-connecting portion 5 connected to one end of a narrow tab 4, and the press-connecting portion 5 is press-fitted and connected on the center line Q of the tab 4. A slot 6 for use is provided and has the same structure as the conventional flat press contact terminal a shown in FIG. 7 (A). L ₁ is the length of the press contact portion 5 in the vertical direction,
L ₂ is the length of the tab 4 in the vertical direction. On the other hand, the press contact terminal 3'is provided with a crank bent portion 9 while leaving the spacer portion 8 on the press contact portion 5'side of the tab 4 ', that is, the base end portion side.
Has the same specifications as the press contact terminal 3 except that a step is formed between the press contact portion 5'and the press contact portion 5 '.
The vertical lengths of the tabs 4'including L are L ₁ and L ₂ , respectively.

As is apparent from FIG. 3, the pressure contact terminals 3,
When the tabs 4 and 4'of 3'are arranged side by side at a constant pitch P in a row (X direction), the pressure contact portion 5'is placed behind the adjacent pressure contact portion 5 via the crank bending portion 9 and the spacer portion 8 (Y Direction), the insulation distance between the pressure contact terminal 3 and the pressure contact terminal 3'can be made sufficiently large. That is, the height h of the spacer portion 8
By appropriately selecting the length 1 of the crank bending portion 9, the pitch P between the tab 4 and the tab 4'can be reduced within a range in which the tab 4 and the tab 4'are not in contact with each other. Therefore, by using the flat type pressure contact terminal 3 and the stepped pressure contact terminal 3 ', it is possible to sufficiently cope with a narrow terminal pitch of the external connector.

As shown in FIGS. 4 to 6, the flat type pressure contact terminal 3 and the stepped pressure contact terminal 3'are integrally fixed to the upper case 1 by insert molding, and at the time of insert molding, the crank bending portion is formed. An enclosing wall 10 is formed at the base end portions of the pressure contact portions 3, 3 ′ including 9. The height of the surrounding wall 10 is about 1/2 of the pressure contact portion 5 (5 '), an electric wire receiving groove 11 is provided in the center of the wall portion 10a before and after the pressure contact portion 5 (5'), and in the middle of the wall portions 10a, 10a. It is preferable to provide an escape groove 12 which allows elastic deformation of the press contact portions 5, 5 '.

Although the flat type pressure contact terminal 3 and the stepped pressure contact terminal 3'are applied to the connector receiver 2 formed integrally with the upper case 1 of the electric junction box, the connector receiver 2 is usually independent. It may be formed as a female or male connector or a branched connector. In short, the present invention can be applied to any connection structure including both pressure contact terminals 3 and 3 ′, an insulating plate (in the embodiment, the upper wall of the upper case 1) supporting them, and the electric wire 7.

[0014]

As described above, according to the first aspect of the present invention, the normal flat type pressure contact terminal and the stepped pressure contact terminal which is crank-bent with the spacer portion left in the connection terminal portion are used together to be adjacent to each other. Interference between the flat type and the pressure contact terminals with steps can be avoided, and the insulation distance can be sufficiently maintained to reduce the pitch between the connection terminal portions, which is useful for downsizing of connectors and the like. According to the second aspect of the present invention, since the both pressure contact terminals are fixed to the insulating support plate by the insert, the wiring structure of the electric wire can be made one layer, and the bulk change of the connector or the electric connection box can be suppressed, Contributes to miniaturization. According to the third aspect of the present invention, at least one of the pressure contact terminals ensures insulation by the at least one enclosure wall, and when the two enclosure walls are provided, the supporting force for the both pressure contact terminals is enhanced. It is possible to reduce the thickness of the insulating support plate.

[Brief description of drawings]

FIG. 1 is a sectional view of an essential part of an electric junction box showing an embodiment of the present invention.

FIG. 2 is a plan view of a main part of a connector receiving portion of FIG.

3 is a perspective view of pressure contact terminals 3 and 3'in FIG. 1. FIG.

4 is a perspective view of an essential part showing a mounting state of the pressure contact terminal 3'in FIG. 1 to an insulating plate (upper case).

5 is a sectional view taken along line XX of FIG.

6 is a front view showing a pressure contact state between the pressure contact terminal 3 and the electric wire 7 of FIG. 1. FIG.

7A to 7C are perspective views showing conventional pressure contact terminals.

[Explanation of symbols]

 1 Upper case (as an insulating plate) 2 Connector receiver 3 Flat type pressure contact terminal 3'Stepped pressure contact terminal 4, 4 '(portion as connection terminal) Tab 5, 5'Press contact portion 6, 6'Slot 7 Wire 8 Spacer Part 9 Crank bending part 10 Enclosing wall 11 Electric wire receiving groove 12 Escape groove

Claims (3)

[Claims] 1. A plurality of pressure contact terminals having a connection terminal portion at one end and a pressure contact portion of an electric wire at the other end, and supporting these pressure contact terminals with the connection terminal portions protruding from a plate surface at a predetermined pitch. And a flat type pressure contact terminal in which the pressure contact portion and the connection terminal portion are flush with each other, and a connection terminal portion leaving a spacer portion flush with the pressure contact portion. A wiring board characterized in that it is formed by alternately arranging and crimping a stepped crimping terminal with steps. 2. The wiring board according to claim 1, wherein the flat pressure contact terminal and the step pressure contact terminal are integrally fixed to the insulating plate by insert molding. 3. The wiring board according to claim 1, wherein at least one of the flat type pressure contact terminal and the stepped pressure contact terminal has its rising base portion insulated by a surrounding wall.