JPH03683Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a terminal useful for assembling an electrical connection box using a wiring board, particularly a busbar wiring board.

[Conventional technology]

Conventionally, busbar circuits b ₁ , b ₂ . . . having male terminal portions a at the ends as shown in FIG. A method of assembling a wiring board disposed on an insulating substrate d having holes is generally used.

However, when forming circuits and male terminals by pressing and bending, the circuit configuration is complicated and the yield is poor due to the large amount of punching waste. A method has been proposed in which both ends or one end of the members e ₁ and e ₂ are pressed into a flat shape to form a hardened terminal portion f (Utility Model Application No. 55-2129).

However, with the above-mentioned flat pressing method, the perpendicularity is not accurate when bending the terminal, making it difficult to control the terminal pitch, making assembly with insulating substrates, etc. troublesome, and causing processing stress on the right-angled bent portion. There is a risk of concentrated cracks occurring, and
When mating a mating terminal or connector, a problem has arisen in that cracks are likely to occur because vertical or horizontal forces are concentrated on the bent portion.

[Problem that the invention attempts to solve]

The purpose of the present invention is to form the conductive members and terminals of the busbar circuit separately, absorb and alleviate external forces and positional deviations applied to the terminals in the front and back, left and right, and up and down directions, and to assemble the wiring board. The present invention aims to solve the conventional problems by providing a wiring board terminal that can be easily made.

[Means for solving problems]

The purpose of the present invention described above is to provide an electrical terminal that is separately formed by press molding or the like and configured to be fixed to a circuit conductor such as a wiring board, with an elastic buffer function for connecting the terminal to the circuit conductor. This is achieved by integrally providing a connecting leg with a
That is, the present invention is a terminal having an electrical contact portion at the tip of a board and connecting legs for connecting to a circuit conductor of a wiring board extending from the base, and the board has a means for locking the cover of the wiring board. and the connecting leg has a first elastic damping section curved in a direction perpendicular to the axis of the terminal, and a first elastic damping section curved in a direction perpendicular to the axis of the terminal and in a direction of curvature of the first elastic damping section. A second elastic shock absorbing section curved in a direction perpendicular to the circuit conductor is sequentially provided, and a connecting floor plate with a conductor capable of maintaining the axis of the terminal perpendicular to the axis of the circuit conductor is provided at the tip of the second elastic shock absorbing section. This is a interconnected wiring board terminal.

Furthermore, by dividing the connecting leg into a plurality of parts over a part or all of it, the shock absorbing function is further improved and the reliability is improved.

[Effect]

In the wiring board terminal of the present invention, the connection plate is fixed to the circuit conductor by means such as welding, and the electrical contact part penetrates, for example, the cover of the wiring box and protrudes into the connector housing formed on the surface thereof. However, even if misalignment occurs when the connecting floor plate is fixed to the circuit conductor by spot welding, etc., the elastic buffer part has a degree of freedom in each direction. Therefore, it can be attached to a wiring board without applying excessive force, and can be easily assembled into an electrical connection box.

When connecting the connector to the electrical connection box assembled in this way, the elastic buffer can absorb the stress that is applied vertically, front to back, right and left when the terminals are mated together, so that excessive force is applied and the terminals do not deform. Never.

[Example 1] FIG. 1 shows an example of the wiring board terminal of the present invention.
The terminal T has an electrical contact part (male tab 2 in this example) for a mating terminal at the tip of the board 1, and a connection floor plate 4 to the circuit conductor C of the wiring board via connection legs 3, 3' on the base side. , 4'.

The connecting legs 3 and 3' have a pair of left and right free edges extending from the base end of the board 1 that are curved in opposite directions, that is, curved so as to extend outward from each other with the plane containing the board 1 as the center. A pair of first elastic buffer portions 3a, 3a' are formed, and a free edge extending laterally away from the first elastic buffer portions 3a, 3a', that is, a free edge including the axis of the substrate 1 and perpendicular to the substrate 1. A folded portion 3b, 3 in which a free edge extending away from the plane centered on the plane is folded back toward the orthogonal plane side.
It consists of a pair of opposing second elastic buffer parts 3c, 3c' which are curved back to back with each other through b',
Connecting floor plates 4, 4' connected to the tips of the second elastic buffer parts 3c, 3c' are fixed to copper wires C as circuit conductors by means such as spot welding.

Note that the substrate 1 is provided with a locking hole 1a.

The wiring board terminal T of this example is press punched from a thin metal plate into the shape shown in FIG. 3, and is then bent to form an integral piece. Examples of the metal thin plate used as the material include thin plates of copper, brass, beryllium copper, phosphor bronze, etc., and those having a large elastic modulus are preferred from the viewpoint of the function of the elastic buffer section.

As shown in FIG. 2, the terminal T configured in this way is constructed by connecting the connecting floor plates 4, 4' to the copper wire C bent into a desired shape (circuit pattern) arranged on the insulating substrate P. When the cover 5 of the electrical junction box is attached after being fixed as shown in FIG. The arm 8 is engaged with the locking hole 1a to be positioned and locked,
It becomes possible to fit and connect with the male terminal 10 of the connector 9 that is fitted from the outside.

Even if "nicking" occurs due to pressure when the terminal T is welded and fixed to the copper wire C, the first elastic buffer parts 3a, 3a' and the second elastic buffer part 3 in the connecting legs 3, 3'
c and 3c', the electrical contact portion 2 is given freedom in the front-rear direction and left-right direction, respectively, and since the upper and lower elastic buffer portions are each curved, the freedom in the up-down direction is also given. Given.

Therefore, when attaching the cover 5, the electrical contact portion 2 can be smoothly attached to the terminal housing chamber 7, and there is no need to use a precision jig during spot welding, and the wiring board and electrical connection box can be easily attached. It will also be easier to assemble.

Further, when connecting the terminal T and the female terminal 10 of the connector 9, the vertical force applied to the electrical contact part 2 is received by the connecting legs 3, 3', and the longitudinal force is received by the first elastic buffer parts 3a, 3a. It acts in the direction of twisting, but due to the presence of the folded parts 3b and 3b'
In addition to effectively preventing the occurrence of
The elastic buffer portions 3c and 3c' relieve stress.

Therefore, even if the axes of the electrical contact part 2 of the terminal T and the mating female terminal 10 are slightly misaligned, the connection can be made smoothly, stress can be avoided from being concentrated in one part, and stable electrical connection can be achieved. The connection status can be maintained.

[Embodiment 2] FIG. 4 shows another embodiment of the wiring board terminal T, in which the electrical contact portion 2' has elastic clamping arms 2a on both sides of the board 1.
2a' is formed to form a female terminal portion, and a locking lance 1b is cut and raised in the substrate 1 in place of the locking hole 1a. In addition, the connecting floor plates 4, 4'
is curved in advance to match the curved surface of the copper wire C.

Such electrical contact portions 2, 2' may be either female or male depending on the relationship with the mating terminal.

Further, the buffering function of the terminal in this example is exactly the same as in the first embodiment.

[Embodiment 3] FIG. 5 shows another example of a wiring board terminal. The terminal T is formed by providing an electrical contact portion 12 at the tip of a board 11, and connecting floor plates 14, 14' to the circuit conductor C of the wiring board via connection legs 13 at the base.

The connection leg 13 is provided continuously on the base side of the board 11, and has a first elastic buffer part 13a that is curved so as to protrude to at least one side with respect to the plane containing the board 11.
and a bent part 13b extending side by side from both sides of the lower end of the first elastic buffer part 13a and bent in parallel so as to face each other, and wing pieces 13c, 13 thereof.
c′, and a pair of second elastic buffer portions 13d, 13 which further extend in the axial direction of the terminal, are curved so as to protrude to both sides, and are further folded back from inward to outward.
It consists of d′. Further, connecting floor plates 14, 14' for fixing to the circuit conductor C by spot welding or the like are provided at the tips of the second elastic buffer parts 13d, 13d'.

In the terminal T of this example, the first elastic buffer portion 13a is integrally formed, and the second elastic buffer portions 13d, 13
Although d' is divided into two parts and formed symmetrically, their function as the connecting legs 13 is exactly the same as in the first embodiment.

[Effect of idea]

The circuit board terminal of the present invention has an elastic buffer function in the vertical, front and rear, and left and right directions for the connecting legs that connect to the circuit conductor, so it is easy to prevent misalignment when it is fixed to the circuit conductor. It is also easy to assemble wiring boards and electrical junction boxes. Furthermore, it is not necessary to strictly control the accuracy of the fixing position between the terminal and the circuit conductor, which helps reduce costs. Furthermore, stress concentration on the terminals or circuit conductors can be avoided when fitting and connecting the connector, so failures due to wear or cracks can be prevented.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of an example of the wiring board terminal of the present invention;
Figure 2 is a sectional view of the main parts showing the assembled state, Figure 3
The figure is a developed view of this terminal. FIG. 4 is a perspective view of another example of the wiring board terminal of the present invention. FIG. 5 is a perspective view of another example of the wiring board terminal of the present invention, and FIG.
The figure is a longitudinal sectional view showing the assembled state. FIG. 7 is an explanatory diagram of a conventional bus bar wiring board, and FIG. 8 is an explanatory diagram of a conductive member constituting a conventional circuit.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A terminal having an electrical contact portion at the tip of a board and connecting legs extending from the base to a circuit conductor of a wiring board, the board having a cover of the wiring board. the first connecting leg forming a curvature in a direction perpendicular to the axis of the terminal;
An elastic buffer section and a second elastic buffer section curved in a direction perpendicular to the axis of the terminal and also perpendicular to the curve direction of the first elastic buffer section are provided in order, and a terminal is provided at the tip of the second elastic buffer section. A terminal for a circuit board, which is formed by interlocking a connecting floor plate with a conductor whose axis can be maintained perpendicular to the axis of the circuit conductor. (2) The wiring board terminal according to claim 1 of the utility model registration, in which the connecting leg is divided into a plurality of parts.