JPS6025820Y2 - electrical connection device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device that is interposed between an object to be electrically connected, such as an electrical component, and a lead wire to electrically connect them to each other.

For example, when electrically connecting a lead wire to an electrically connected object such as a printed wiring board, conventionally the lead wire is connected directly to the conductive part of the electrically connected object by soldering, or from the electrically connected object. A method is employed in which a connector connected to a lead wire is fitted into the protruding terminal pin to establish electrical continuity.

However, with such conventional connection structures, when external force is applied to the lead wires, there are problems such as the soldering between the lead wires and the conductive part of the electrically connected object coming off, or the connector falling off, and vibrations. When exposed to heat or temperature changes, the contact portion slides slightly, leading to fretting corrosion and the like, which tends to cause poor conductivity.

The present invention was developed based on these circumstances, and its purpose is to maintain continuity between the lead wire and the electrically connected object even if an external force is applied to the lead wire or vibration or temperature changes occur. The purpose is to provide an electrical connection device that can securely hold the electrically connected objects, absorb the relative displacement of electrically connected objects even if there is a mounting error, prevent corrosion, etc., and have a highly reliable contact state. .

That is, the present invention not only fits and locks the terminal connected to the lead wire through the crimp part into the insulating housing,
By fixing this housing to the base, the external force applied to the lead wire is supported by the base through the housing that accommodates the terminal, and the terminal has an elastically deformable contact arm extending outside the housing. The contact arm is connected to a conductive portion of the object to be electrically connected, so that relative displacement due to vibration, temperature change, installation error, etc. is absorbed by elastic deformation of the contact arm.

A first embodiment of the present invention will be described below with reference to FIGS. 1 to 4.

In the figure, 1 is a base corresponding to a dash board of a vehicle, etc., and 2 is a printed wiring board for electrical control fixed to this base 1.

Although the printed wiring board 2 is not shown in detail, as is well known, the surface is provided with blind wiring 3, and the end thereof has a stopper hole 4 through which the printed wiring 3 is electrically conductive. ing.

A housing 5 is fixed to the base 1.

The housing 5 is integrally molded from an electrical insulator such as a synthetic resin material, and is disposed along the edge of the printed wiring board 2.

As shown in FIG. 2, the clamp 5 is provided with a plurality of accommodation spaces 6, each of which has at least an open upper surface, arranged in a row.

In the side wall facing the printed wiring board 2 in these accommodation spaces 6..., an insertion groove 7 whose upper surface is open is provided.
... is formed.

Further, in each of the housing spaces 6, as shown in FIG. 4, a locking step 8 is provided on the side wall opposite to the side wall on which the insertion groove 7 is formed.

Further, a stopper step 9 for regulating the insertion depth is provided on the other side wall.

Positioning convex walls 10a and 10b are integrally provided at both ends of the housing 5 in the longitudinal direction.

These convex walls 10a, 10b are fitted into recesses 11.degree. 11 (only one shown) formed in the base 1, as shown in FIG. 1, to position the housing 5.

Note that the other convex wall 10b is formed with an insertion groove 13 for inserting the lead wiring 12 therethrough.

Further, the housing 5 is integrally provided with a fixing flange 14 having a radius of 1' on the side facing away from the printed wiring board 2.

This flange 14 has a fixing hole 15 bored therein.

A locking pin 16 protrudes from the base 1 and passes through the fixing hole 15, and a bushing nut 17 is secured to the locking pin 16 from the upper surface of the flange 14.

The housing 5 is therefore fixed to the base 1 by the bushing nut 17 of this flange 14.

Each accommodation space 6 of the housing 5 has a terminal 18 inside.
... is inserted.

The terminal 18 is made of a conductive plate and is constructed as shown in FIG.

That is, on the upper part of the terminal 18, two sets of crimp pieces 19a, 1
9b, 20a, and 20b are cut and raised.

These crimp pieces 19a, 19b and 20a, 20b are
1. Grasp the end of the lead wire 21. The lead wire 21 is clamped by caulking and deforming these crimp pieces.

Note that the crimp pieces 19a and 19b mainly clamp the covering portion 21a of the lead wire 21, and the crimp pieces 20a and 20b mainly crimp the conductive portion 21b of the lead wire 21.

A contact arm 22 extends integrally with the lower end of the terminal 18.

The contact arm 22 is elastically deformable in the vertical direction and extends to the upper surface of the end of the printed wiring board 2 through the insertion groove 7 formed in the housing 5.

At the tip of this contact arm 22, an engaging claw 2 is inserted into and engaged with a locking hole 4 formed in the printed wiring board 2.
3 is bent and formed.

Further, a hook 24 is integrally cut and raised on the back surface of the terminal 18 and is hooked to a locking step 8 provided in the housing 5.

Such a terminal 18 is inserted into the accommodation space 6 of the housing 5 from above after the lead wire 21 is crimped and connected with the crimping pieces 19a, 19b and 20a, 20b.

When the lower edge of the terminal 18 reaches the position where it touches the stopper step 9, the hook 24 hooks on the locking step 8, and the terminal 18
will no longer come out from the housing 5.

In this state, the contact arm 22 of the terminal 18 extends to one side from the insertion groove 7 of the housing 5.
The second engaging claw 23 is elastically pressed against and locked into the locking hole 4 of the printed wiring board 2.

Therefore, the printed wiring 3 of the printed wiring board 2 is electrically connected to the lead wire 21 via the terminal 18.

According to the above embodiment having such a configuration, the lead wire 2
When an external force such as a tensile force is applied to 1, this external force is transmitted to the terminal 18, but since this terminal 18 is locked to the housing 5 via the hook 24, the terminal 18 cannot be pulled out from the housing space 6. There is no risk of it happening.

In addition, since the housing 5 is fixed to the base 1 at the flange 14 by the bushing nut 17 and the locking pin 16, the housing 5 will not be displaced.

In other words, the external force acting on the lead wire 21 is supported by the base 1 via the bousing 5 with the diameter of the terminal 18, and therefore the lead wire is applied to the contact area between the contact arm 22 and the printed wiring board 2. 21 is not affected by external forces.

Therefore, no relative displacement occurs between the contact arm 22 and the printed wiring board 2 at the contact portion thereof.

On the other hand, if the base 1 vibrates or expands due to temperature changes,
If a relative displacement occurs between the terminal 18 and the printed wiring board 2 due to shrinkage, or even if there is a positional deviation between the terminal 18 and the printed wiring board 2 due to installation error, the Since the contact arm 22 is elastically deformable, the arm 22 always brings the engaging claw 23 into elastic contact with the locking hole 4 by elastic deformation such as curving.

Therefore, the relative displacement between the terminal 18 and the printed wiring board 2 is absorbed by the elastic deformation of the arm 22, and the engaging claw 2
3 is always locked in the locking hole 4 and there is no risk of it coming off.

Therefore, electrical continuity between the terminal 18 and the printed wiring 3 is maintained.

In the first embodiment described above, the terminal 18 is formed with a pair of side walls 18a and 18b as shown in FIG. 3, but as shown in a modified example of FIG.
8b may be omitted, or the side walls 18a, 18b may be bent to have a rectangular shape, as in the other modification shown in FIG.

Further, when the terminal 18 is to be locked in the accommodation space 6 of the housing 5, as in the modification shown in FIG. A hook recess may also be formed.

Furthermore, the contact between the terminal 18 and the printed wiring 3 can also be implemented in each modification shown in FIGS. 8A to 8E.

That is, in FIGS. 8A and 8B, the tip edge of the contact arm 22 is simply brought into elastic contact with the surface of the printed wiring 3, so that the contact arm 22 is slid against the surface of the printed wiring 3.

In the examples shown in FIGS. 8C and 8D, the tip of the contact arm 22 and the printed wiring 3 are soldered 80, and in the case of FIG. In addition to engagement with the locking hole 4, soldering 80 is also used.

Furthermore, the contact arm 22 is not limited to being in elastic contact with the upper surface of the printed wiring board 2, but may be guided from the lower surface of the printed wiring board 2 as shown in FIG.

In addition, in FIG. 9, 90 is a spacer.

Furthermore, in the first embodiment, positioning convex walls 10a, 10b are provided protrudingly on the housing 5 side, and the housing 5 is positioned by fitting these convex walls 10a, 10b into the recess 11 on the base 1 side. However, the positioning convex portion may be formed on the base 1 side, and the concave portion may be formed on the housing 5 side.

The means for fixing the flange 14 of the housing 5 to the base 1 is not limited to the bushing nut 17, and may be, for example, screwing, riveting, or caulking the tip of the locking pin 16 by heating, ultrasonic waves, etc. It is also possible to implement

Furthermore, the present invention is applicable not only to printed wiring boards as electrically connected objects but also to various electrical devices and parts, and is not limited to dash boards for vehicles and the like.

As detailed above, in this invention, the housing with the terminal fitted and locked is fixed to the base, and the lead wire is crimped and locked to this terminal, so even if an external force is applied to the lead wire, this external force will not be applied to the terminal or the housing. Since the signal is transmitted to the base via the terminal, there is no displacement of the housing or terminal.

Moreover, an elastically deformable contact arm is extended to the above terminal,
Since this contact arm is connected to the conductive part of the electrically connected object, even if relative displacement occurs between the housing and the electrically connected object due to vibrations, temperature changes, installation errors, etc., the contact arm The above relative displacement is absorbed by the elastic deformation of.

This prevents poor contact between the terminal and the electrically connected object, as well as the occurrence of fretting corrosion, etc., and provides practical applications such as maintaining reliable electrical contact over a long life and improving reliability. It has the desired effect.

[Brief explanation of the drawing]

1 to 4 show a first embodiment of the present invention.
The figure is a perspective view showing the assembled state, Figure 2 is a perspective view of the housing, Figure 3 is a perspective view of the terminal, and Figure 4 is IV-r in Figure 1.
It is a sectional view along the V line. Figures 5 and 6 are perspective views showing modified examples of the terminal, Figure 7 is a cross-sectional view showing modified examples of the terminal hooking structure, and Figures 8 A to E are respectively the contact between the contact arm and the printed wiring. FIG. 9 is a sectional view showing a modification of the structure, and FIG. 9 is a sectional view showing another embodiment. DESCRIPTION OF SYMBOLS 1...Base, 2...Printed wiring board, 3...Printed wiring, 5...Housing, 6...Accommodation space, 10a , 10b...
... Convex wall, 11 ... Concave part, 14 ...
・Flange, 18...Terminal, 19 a, 1
9b, 20a, 20b...Crimping piece, 22...
...Contact arm.

Claims (2)

[Scope of utility model registration request] (1) A terminal made of a conductive single plate is fitted into an electrically insulating housing attached to a base, and a crimping part for a lead wire is formed at one end of the terminal, and the housing is attached to the other end of the terminal. 1. An electrical connection device, comprising: an elastically deformable contact arm extending from an electrically connected body, the contact arm being connected to a conductive portion of an object to be electrically connected. (2) The housing and the base are positioned relative to each other by a convex portion provided on one of them and a concave portion provided on the other, and are fixed to each other by a fixing flange protruding from the housing. An electrical connection device according to claim 1, characterized in that it is a utility model.