JP3494903B2 - Wire connection structure to insulation displacement terminal - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wire connection structure for a pressure contact terminal, in which an electric wire is press-fitted into a U-shaped slot-shaped pressure contact blade of the pressure contact terminal for pressure contact connection.

[0002]

2. Description of the Related Art As a conventional electric wire connection structure for a pressure contact terminal of this type, there is one disclosed in Japanese Patent Application Laid-Open No. 4-33286, and the electric wire connection structure is shown in FIGS.
It shows in (c). FIG. 5A shows a state before connecting the electric wires, and FIGS. 5B and 5C show a state after connecting the electric wires.

As shown in FIGS. 5A and 5B, the electric wire 1
Is composed of a core wire 1a formed by twisting a plurality of conductors, and an insulating coating 1b covering the outer circumference of the core wire 1a. The pressure contact terminal 2 has pressure contact piece portions 3 standing up and down in front and rear thereof, and a U-shaped slot-like pressure contact blade 3a opening upward is formed at the center of each pressure contact piece portion 3.

In the above structure, when the electric wire 1 is press-fitted into the U-shaped slot-shaped press-contact blade 3a from above the press-contact terminal 2, the insulating coating 1b of the electric wire 1 is broken by the press-contact blade 3a. As a result, the press contact blade 3a comes into contact with the core wire 1a of the electric wire 1, and the press contact blade 3a
And the core wire 1a are electrically connected.

[0005]

However, in the conventional wire connection structure to the pressure contact terminal 2, as shown in FIG. 5 (c), the wire 1 having a large diameter is connected to the pressure contact blade 3 of the pressure contact terminal 2.
When press-fitting into a, since the number of conductors forming the core wire 1a is larger than that of the small-diameter size, the core wire 1a is scattered so as to extend in the vertical direction of the U-shaped slot-shaped press contact blade 3a, and There is a problem in that the required contact pressure cannot be maintained between the lapping blade 1a and the press contact blade 3a.

Therefore, the present invention has been made to solve the above-mentioned problems, and the core wire of an electric wire does not come apart during press fitting into the press contact blade of the press contact terminal, and the core wire and the press contact blade are sufficiently separated from each other. It is an object of the present invention to provide a wire connection structure to a pressure contact terminal capable of maintaining a high contact pressure.

[0007]

The invention according to claim 1 is an electric wire
Attach the wire cap to the outer circumference of the
Opposed to the U-shaped slot-shaped pressure contact blade of the pressure contact terminal of the cap.
A slit hole extending in the wire press-fitting direction is provided at this position, and this slit
Align the pressure contact blade of the pressure contact terminal with the lit hole and attach it to the pressure contact blade.
In the electric wire connection structure to the press contact terminal for press-fitting and connecting the electric wire, the electric wire cap is opened and closed via the hinge portion.
It is composed of a pair of divided caps that are
Press-fit the wire at the position facing the press contact blade of the press contact terminal
The slit holes extending in the direction are symmetrical with the hinge part in between.
Each is characterized by being provided .

In this electric wire connection structure, when the electric wire is pressed into the U-shaped slot-shaped press contact blade of the press contact terminal, the core wire of the electric wire receives a pressing force from the press contact blade, but constitutes a wire cap .
The pair of split cap bodies restricts the deformation of the insulation coating of the electric wire, and the core wire cannot move freely.

[0009]

[0010]

[0011] The invention according to claim 2, claim 1 a wire connection structure to pressure terminal according, the half of the outer circumference substantially the same diameter of the wire to the inner peripheral surface of each divided cap member <br/> It is characterized in that it is formed in a circular shape.

In this wire connection structure, in addition to the function of the invention of claim 1, the core wire inside the wire is twisted and has a circular shape as a whole, and the outer shape of the insulating coating covering the core wire is also a circular shape. The pair of split caps that make up the wire cap.
Since Tsu covering the inner peripheral surface of substantially the same diameter of up body, the movement of the core wire is most effectively regulated.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 (a) is a perspective view of an electric wire cap used in the electric wire connecting structure to the press contact terminal according to the first embodiment of the present invention, and FIG. 1 (b) is an electric wire press contact terminal through the electric wire cap. 2A to FIG. 2 are sectional views showing a state of being connected to
(C) is a perspective view which shows the connection process of the electric wire to a press contact terminal, respectively.

As shown in FIGS. 1 (b) and 2 (a)-(c), the electric wire 1 includes a core wire 1a formed by twisting a plurality of conductors into a circular shape, and an outer circumference of the core wire 1a. It is composed of an insulating coating 1b for coating.

As shown in FIGS. 1 (b) and 2 (c), the press contact terminal 2 has a pair of press contact pieces 3 and 3 which are vertically bent at the front and rear of the bottom plate 4. A U-shaped slot-shaped press contact blade 3 a is formed at the center of each press contact piece 3. The upper part of each press contact blade 3a is formed so that the opening area increases as it goes upward.

As shown in FIGS. 1 (a), 2 (b) and 2 (c), the electric wire cap 5 detachably attached to the electric wire 1 is a semi-cylindrical shape made of metal or resin. And has a pair of divided cap bodies 6 and 6. The pair of split cap bodies 6 and 6 are connected via a hinge portion 7, and can be opened and closed with the hinge portion 7 as a fulcrum. Further, the end faces (joint side end faces) on the opposite side of the hinge portion 7 of the pair of split cap bodies 6 and 6 are step faces having mutually opposite shapes. Then, the electric wire cap 5 is in the released state shown in FIG. 1A in which the joining-side end surfaces of the pair of split cap bodies 6 and 6 are separated from each other, and FIG. The wearing state shown in (b) can be set.

A pair of front and rear slit holes 8, 8 are formed in each divided cap body 6, and each slit hole 8 extends in the wire press-fitting direction into each pressure contact blade 3a of the pressure contact terminal 2 of the wire 1. ing. Further, the inner peripheral surface 6a of each divided cap body 6 is formed in a semicircular shape having substantially the same diameter as the outer periphery of the electric wire 1.

A procedure for connecting the electric wire 1 to the pair of press contact blades 3a, 3a of the press contact terminal 2 in the above structure will be described. As shown in FIG. 2B, the electric wire cap 5 is attached to, for example, an intermediate portion of the electric wire 1 shown in FIG. 2A. Here, the mounting work can be configured to be performed by an automatic crimping machine, and if configured in this manner, the work efficiency is improved. The pair of divided cap bodies 6 and 6 are fixed to each other by a lock structure, an adhesive or the like (not shown).

Next, the electric wire 1 fitted with the electric wire cap 5 is arranged above the pair of press contact blades 3a, 3a of the press contact terminal 2, and each slit hole 8 of the electric wire cap 5 is aligned with each press contact blade 3a. Then, when press-fitted into each of the press contact blades 3a, the insulating coating 1b of the electric wire 1 causes the slit holes 8 of the electric wire cap 5
When the press contact blades 3a come into contact with the upper opening side of the pressure contact blades 3a via the above and further press-fitted from this state, the insulation coating 1b of the electric wire 1 is broken at the pressure contact blades 3a as shown in FIG. Is pressed in. As a result, the press contact blade 3a that pierces the insulating coating 1b comes into contact with the core wire 1a inside the electric wire 1, and the press contact blades 3a and the core wire 1a are electrically connected.

The core wire 1a formed by twisting a plurality of conductors in the press-fitting process of the press-connecting terminal 2 of the electric wire 1 into each press-connecting blade 3a receives a pressing force from each press-connecting blade 3a. Since the deformation of the core wire 1a is restricted and the inner core wire 1a cannot freely move, the core wire 1a does not disperse when press-fitting into the press contact blades 3a of the press contact terminal 2, and the core wire 1a and the press contact blades 3a are sufficiently separated from each other. Can maintain a good contact pressure.

According to the first embodiment, the core wire 1a is twisted and has a circular shape as a whole, and the outer shape of the insulating coating 1b also has a circular shape. Since it is covered with the peripheral surface 6a, movement of the core wire 1a is most restricted,
The circular shape of the core wire 1a can be held most effectively.

FIG. 3 is a perspective view of an electric wire cap 5'and an electric wire 1 used in the electric wire connecting structure to the pressure contact terminal according to the second embodiment of the present invention. In the second embodiment, the same components as those in the first embodiment are designated by the same reference numerals in the drawings, and the description thereof will be omitted. Only different components will be described.

That is, a semi-circular wall portion 9 is integrally formed at each tip of each of the pair of divided cap members 6 and 6 constituting the wire cap 5 ', and each wall portion 9 is attached when the wire is attached.
Come into contact with each other. In addition, a locking claw (locking portion) 10a is provided on the end surface side of each joining side of the pair of split cap bodies 6 and 6.
And an engaging hole (engaging portion) 10b are respectively formed.

With this configuration, when the electric wire cap 5'is changed from the released state to the mounted state, the locking claw 1
0a and the engagement hole 10b are locked. Further, since the respective wall portions 9 abut each other when the electric wire is attached, the electric wire cap 5'becomes a strong structure and the reliability of the component is increased.

4 is a perspective view of an electric wire cap 5 ″ used in the electric wire connecting structure to the pressure contact terminal according to the third embodiment of the present invention. In the third embodiment, the same structure as the first embodiment is used. The same reference numerals are given to the drawings in the drawings, and the description thereof will be omitted. Only different constituent parts will be described.

That is, the electric wire cap 5 "has a rectangular outer shape, and the inner peripheral surface 6a is composed of a pair of divided cap bodies 6" and 6 "having a semicircular surface. As a result, substantially the same actions and effects as in the first embodiment can be obtained. Here, the inner peripheral surface 6 of each split cap body 6 ″ is obtained.
If a is also formed in a rectangular shape like the outer shape, the deformation of the insulation coating 1b of the electric wire 1 cannot be sufficiently regulated, but the inner peripheral surface 6a is different from the outer shape to be a semicircular surface, so that the insulation coating 1b of the electric wire 1 is The deformation can be regulated most effectively as in the first embodiment.

According to each of the above-described embodiments, the electric wire cap has a structure in which a pair of divided cap bodies are connected by a hinge portion, but it may have a completely separated structure. However, in the case of the completely separated structure, the management and mounting work of the parts becomes troublesome, so that the structure connected by the hinge portion is preferable. The electric wire cap may be divided into three or more members.

[0029]

As described above, according to the first aspect of the invention, a pair of wires forming the wire cap on the outer circumference of the wire.
The split cap body is detachably mounted via the hinge portion, and a slit hole extending in the wire press-fitting direction is sandwiched between the pair of split cap bodies at positions facing the U-shaped slot-like pressure contact blades with the hinge portion interposed therebetween. respectively symmetrically, by which is freely pressing the wire to the piezoelectric contact blades together pressing blades crimp terminals to the respective ground <br/> Tsu preparative hole, upon press-fitting of the press-contact blades of the press contact terminals of the wire core wire of the electric wire is subjected to a pressing force from the pressure-blades, but the deformation of the insulating coating of the wire by a pair of split cap member mounted to the electric wire is regulated, because the interior of the core can not move freely, the core wire is crimp terminals pressure It is possible to maintain a sufficient contact pressure between the core wire of the electric wire and the press contact blade of the press contact terminal without being loosened when press-fitting into the terminal.

[0030]

According to the invention of claim 2 , in addition to the effect of the invention of claim 1, the core wire of the electric wire is twisted and has a circular shape as a whole, and the outer shape of the insulating coating covering the core wire is also a circular shape. A pair of split caps that have an electric wire cap
By covering the body with the inner peripheral surface having substantially the same diameter, the movement of the core wire of the electric wire can be surely regulated, and the circular shape of the core wire can be held most effectively.

[Brief description of drawings]

FIG. 1A is a perspective view of an electric wire cap used in an electric wire connection structure for an insulation displacement terminal according to a first embodiment of the present invention;
(B) is sectional drawing which shows the state which connected the electric wire to the press contact terminal via the same electric wire cap.

2A is a perspective view of the electric wire, FIG. 2B is a perspective view showing a state in which the electric wire cap is attached to the electric wire, and FIG.
FIG. 3 is a perspective view showing a state in which an electric wire is connected to a press contact terminal via the electric wire cap.

FIG. 3 is a perspective view of an electric wire cap and an electric wire used in the electric wire connection structure for the pressure contact terminal according to the second embodiment of the present invention.

FIG. 4 is a perspective view of an electric wire cap used in a structure for connecting an electric wire to a pressure contact terminal according to a third embodiment of the present invention.

5A is a cross-sectional view showing a state before connection of an electric wire showing a conventional electric wire connection structure to an insulation displacement terminal, FIG. 5B is a cross-sectional view showing a state after connection of the electric wire, and FIG. It is sectional drawing which shows the state after connection of the electric wire of a large diameter size.

[Explanation of symbols]

1 electric wire 1a core wire 1b Insulation coating 2 Pressure contact terminal 3a Pressing blade 5,5 ', 5 "wire cap 6,6 ', 6 "split cap body 6a Inner surface 8 slit holes 9 walls

Front page continuation (58) Fields surveyed (Int.Cl. ⁷ , DB name) H01R 43/01 H01R 4/24

Claims (2)

(57) [Claims] 1. An electric wire cap is detachably attached to the outer circumference of the electric wire.
Attach the slide cap to the press contact terminal of this wire cap and extend it in the wire press fit direction at the position facing the U-shaped slot press contact blade.
Hole is provided, and the press contact blade of the press contact terminal is inserted into this slit hole.
In the electric wire connection structure to the press contact terminal in which the electric wire is press-fitted and connected to the press contact blade, a pair of the electric wire caps which are opened and closed via a hinge portion
The divided cap body is composed of the divided cap bodies.
Extend in the wire press-fitting direction at the position facing the press-contact blade of the press-connect terminal.
Slit holes are installed symmetrically across the hinge.
Electric wire connection structure of the pressure contact terminal, characterized in that digit. 2. The electric wire connection structure to the press contact terminal according to claim 1, wherein an inner peripheral surface of each of the split cap bodies is formed in a semicircular shape having substantially the same diameter as an outer circumference of the electric wire. Wire connection structure to the crimp terminal.