JP2000208190A - Connector terminal - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a connector terminal ensuring and facilitating connecting work without impairing durability. SOLUTION: A connector terminal 1 has an electric wire crimping part 2 at the rear, and an elastic contact piece 4 in a plate spring form at the front, which contacts a corresponding conductor for electric connection, and is provided continuously from a front-end folded-back part 5 protruded from a terminal bottom plate 7. The front-end folded-back part 5 is provided continuously from a rising part 6 extended toward upper front direction linearly at a certain angle of θ from the terminal bottom plate 7.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a terminal structure of a connection terminal used for connection of an electric system of an automobile or the like, and more particularly, to a contact structure of a connection terminal which is in direct contact with and electrically connected to a substrate in an electric connection box. Regarding the structure around one side.

[0002]

2. Description of the Related Art Various structures around a contact piece of a connection terminal are conventionally known. For example, the connection terminal 31 as shown in FIG. 7 has an electric wire caulking portion 32 and a core wire caulking portion 33 at the rear portion, and a leaf spring-like elasticity at the front portion for making an electrical connection by contacting a mating conductor portion. The contact piece 35 is a female connection terminal connected to the front end folded portion 34 protruding from the terminal bottom plate 36. The elastic contact piece 35 is generally covered by a top plate 38 supported by a side plate 37 erected on the terminal bottom plate 36, and is electrically connected to the top plate 38 by pressing and holding the mating conductor. Connection state can be obtained.

At the time of the connection operation of the connection terminal 31 having the above configuration, the mating male conductor is connected to the front end folded portion 34 from the front.
Is guided by the top plate 28 and enters while pressing the elastic contact piece 35. At this time, the elastic contact piece 35 and the front end folded portion 34 bend, and sandwich the mating conductor together with the top plate 38 to be electrically connected.

[0004]

However, in the above-described conventional connection terminal 31, the mating male conductor portion is guided from the front by the front-end folded portion 34 and the top plate 38 and enters while pressing the elastic contact piece 35. The elastic contact piece 35
Then, the front end folded portion 34 bends. Finally, the opposing conductor is sandwiched together with the top plate 38. In this case, since the bent portion is only the elastic contact piece 35 and the front end folded portion 34, the value of the distributed load with respect to the amount of bending is relatively large, and the resistance force is further increased as the mating conductor portion advances. Therefore, there is a problem that the workability of the connection work is reduced.

An object of the present invention has been made in view of the above-mentioned problems, and it is an object of the present invention to provide a connection terminal in which the connection work is reliable and easy without impairing the durability.

[0006]

SUMMARY OF THE INVENTION The object of the present invention is to provide a flat spring-shaped elastic contact piece which has a wire caulking portion at a rear portion and a front portion which makes electrical connection with a mating conductor portion. In the connection terminal provided subsequent to the front end folded portion protruding from the terminal bottom plate, the elastic contact piece and the front end folded portion linearly extend upward and forward from the front end of the terminal bottom plate at a constant rising angle. The problem can be solved by a connection terminal characterized by being connected to the raising portion.

According to the connection terminal having the above structure, since the elastic contact piece and the front end folded portion are continuously provided from the front end of the terminal bottom plate to the rising portion linearly extending upward and forward at a constant rising angle. The bent portion due to the contact of the opposing conductor portion also bends the rising portion in addition to the elastic contact piece and the front end folded portion. Therefore, the distributed load with respect to the amount of deflection is reduced, and the resistance force associated with the contact of the mating conductor portion does not increase sharply, the connection work can be performed with almost constant pressing force, and the workability is improved. Can be.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of a connection terminal according to the present invention will be described below in detail with reference to FIGS. FIG. 1 is a perspective view showing an embodiment of the connection terminal of the present invention, FIG. 2 is a side view in FIG. 1, FIG. 3 is a development view in FIG. 2, FIG. FIG. 6 is a front view showing a state where the connection terminals in FIG. 1 are accommodated in the connector housing, and FIG. 6 is a view EE showing a relationship with a mating substrate in FIG.
It is sectional drawing. As shown in FIGS. 1 and 2, the connection terminal 1 of the present embodiment has a wire crimping portion 2 and a core wire crimping portion 3 at the rear.
A female connection terminal having a leaf spring-shaped elastic contact piece 4 for making electrical connection by contacting a mating conductor portion at the front portion, and having a constant rising angle θ from the front end of the terminal bottom plate 7. Thus, a rising portion 6 linearly extending obliquely upward and forward is formed. An R-shaped front end folded portion 5 protruding from the front end is connected to the rising portion 6 and is connected to the front end folded portion 5.
The elastic contact piece 4 extends obliquely upward and rearward from the contact portion and presses the mating conductor.

Further, as shown in FIG. 3, in a development view of the connection terminal, a portion surrounded by a U-shaped punched hole is a terminal lance 8 to be engaged with a connector housing (not shown). Numeral 9 is that which is locked to a housing lance of the connector housing. Also, at the right end in the figure, a wire crimping portion 2 for crimping the covering portion of the wire end.
And a core caulking portion 3 for crimping the core portion, and a deflection regulating wall 1 for suppressing the amount of deflection of the elastic contact piece 4 on both sides at the center in the figure.
0 is provided. Further, at the left end in the figure, the above-mentioned elastic contact piece 4, front end folded portion 5, and rising portion 6 are continuously provided in a belt shape. Then, it is finished as shown in FIG. 1 by appropriately bending the portion shown by the imaginary line in the figure.

Next, the theoretical support of the connection terminal having the above configuration will be described with reference to FIG. First, when the distributed load ω acts on the elastic contact piece 4, the bending amount at the tip A point is δ 1, the bending amount between the points A and B is δ 1, the bending amount of the front end folded portion 5 between the points B and C is δ 2, Assuming that the bending amount of the rising portion 6 between the points C and D is δ3, the total bending amount δ = δ1 + δ2 + δ3 holds. Therefore, since the spring constant K = ω / δ, K
= Ω / (δ1 + δ2 + δ3). Therefore, the starting part 6
The spring constant K is reduced by adding
The spring can be softened without reducing the force, and the repulsive force can be kept substantially constant even if the amount of bending increases.

Next, a state in which the connection terminal of this embodiment is housed in the connector housing will be described. As shown in FIGS. 5 and 6, the connection terminal 1 described above is formed in a connector housing 21 of the connector 20, and is housed in a terminal housing chamber 22 in which at least one half (upper side in the figure) is open. You. At this time, the square holes 9 of the terminal bottom plate 7 and the housing lances 23 erected on the bottom wall in the terminal accommodating chamber 22 engage with each other, and the deflection regulating walls 10 are formed on both side walls forming the terminal accommodating chamber 22. It is locked while being guided by the locking groove 24. In this state, the elastic contact piece 4 of the connection terminal 1
It is in a state of being completely exposed upward in the figure.

Next, as shown in FIG. 6, in a state where the connection terminals 1 are completely accommodated in the connector housing 21, the conductor portions 26 on the substrate 25 fixed to predetermined positions of the equipment (not shown) are connected to the connector housing 21. The resilient contact piece 4 on 21 is brought into contact with the exposed connection portion. At this time, in addition to the elastic contact piece 4 and the front end folded portion 5, the rising portion 6 also bends due to the pressing force of the conductor portion 26, so that the connection force does not suddenly increase, and the pressing force is almost constant, and it is sure Can be connected. The connector housing 21 is fixed to a device body (not shown) to which the board 25 is fixed when the connection is completed.

As described above, in the connection terminal 1 of the present embodiment, the elastic contact piece 4 and the front end folded portion 5 are formed by the terminal bottom plate 7.
Since it is continuously provided from the front end to the rising portion 6 linearly extending upward and forward at a constant rising angle θ, the bent portion due to the contact with the mating conductor portion is formed by the elastic contact piece 4 and the front end turning portion 5. In addition, the rising portion 6 also bends. Therefore, the value of the distributed load with respect to the amount of bending is reduced, and the connection force does not increase rapidly with contact with the counterpart conductor portion, and the connection operation can be performed reliably and easily with almost constant pressing force. it can.

It should be noted that the present invention is not limited to the above-described embodiment, but can be embodied in other forms by making appropriate changes. For example, in the present embodiment, the root of the rising portion 6 is located at the front end of the terminal bottom plate 7.
It can be handled even if it is located at the front end of the top plate of the box-shaped terminal.

[0015]

As described above, according to the connection terminal of the present invention, the resilient contact piece and the front end folded portion are linearly extended upward and forward from the front end of the terminal bottom plate at a constant rising angle. Since it is provided continuously, the bent portion due to the abutment of the mating conductor portion also bends the rising portion in addition to the elastic contact piece and the front end folded portion. Accordingly, the value of the distributed load with respect to the amount of bending is reduced, and the connection force does not suddenly increase with the abutment of the opposing conductor portion, and the pressing force becomes almost constant. Therefore, the connection work is performed reliably and easily, and the workability can be improved.

[Brief description of the drawings]

FIG. 1 is a perspective view showing one embodiment of a connection terminal of the present invention.

FIG. 2 is a side view of FIG.

FIG. 3 is a development view in FIG.

FIG. 4 is an explanatory view of the principle of a bending portion in FIG. 1;

FIG. 5 is a front view showing a state where the connection terminals in FIG. 1 are housed in a connector housing.

6 is an EE cross-sectional view showing a relationship with a counterpart substrate in FIG. 5;

FIG. 7 is a perspective view showing an example of a conventional connection terminal.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Connection terminal 2 Wire crimping part 3 Core wire crimping part 4 Elastic contact piece 5 Front end folded part 6 Standing part 7 Terminal bottom plate 10 Deflection control wall 20 Connector 21 Connector housing 22 Terminal accommodating chamber 23 Housing lance 25 Substrate 26 Conductor part θ rising angle

Claims (1)

[Claims] An elastic contact piece in the form of a leaf spring, which has a wire caulking portion at a rear portion and makes electrical connection by contacting a mating conductor portion at a front portion, is provided following a front end folded portion protruding from a terminal bottom plate. In the connection terminal, the elastic contact piece and the front end folded portion are connected to a rising portion linearly extending upward and forward from the front end of the terminal bottom plate at a constant rising angle. Connection terminal.