JP2001332314A - Connection terminal for fixing with screw - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a high strength connection terminal to screw, which is caulked on a conductor caulking part wherein the disconnection of a core wire is prevented and wherein the terminal is difficult to be easily deformed. SOLUTION: On the connection terminal 1 to screw, a connecting part 2 having a screw inserting hole 2a to be screwed and fixed on the counter- connecting part 15, the first coupling part 3, a conductor caulking part 4, the second coupling part 5, and coated caulking part 6 are integrally arranged in succession, and the conductor caulking part 4 is set in a high position from bottom surface of the connecting part 2 and the coated caulking part 6. This is how the bending of a core wire 11a can be eliminated when the core wire 11a is caulked onto the conductor caulking part 4 and disconnection of some part of the core wire 11a made by the bending can be prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a screw connection terminal used for wiring connection of an electric system of a vehicle such as an automobile, and more particularly to a screw for preventing a core wire from being cut when a wire is crimped. The present invention relates to a structure of a connection terminal for stopping.

[0002]

2. Description of the Related Art Conventionally, electric systems in vehicles such as automobiles,
In particular, for connection to a power supply system, a screw connection terminal that is crimped to an end of a wire constituting a wire harness is frequently used. As shown in FIGS. 7 and 8, the conventional screw connection terminal 31 is formed by stamping a single metal plate, and the connection portion 32 and the covering material of the electric wire 33 are viewed from the near side in FIG. 7. A conductor caulking portion 34 for caulking and connecting the core wire 33b exposed by peeling the skin 33a, and a covering caulking portion 35 for caulking the electric wire 33 together with the covering material 33a are provided in series.

The connecting portion 32 has a screw insertion hole 32a for screwing, and a core wire 33b is provided on both sides of the conductor caulking portion 34.
Locking piece 34 for caulking so as to wrap the
a and 34b are provided, and locking pieces 35a and 35b for caulking the electric wire 33 are provided on both sides of the sheath caulking portion 35. FIG. 7 shows locking pieces 34a, 34b, 35a,
This shows a form in which the electric wire 33 is crimped by 35b, and the original shape of the locking pieces 34a, 34b, 35a, 35b is in an upright state on both sides in the width direction of the conductor crimping portions 34, 35. I have.

The procedure for caulking the connection terminal 31 to the electric wire 33 is as follows. First, the covering material 33a at the end of the electric wire 33 is peeled, and the conductor caulking portion 34 is caulked to the exposed core 33b. The connection terminal 31 is crimp-connected to the electric wire 33 by caulking the end portion of the coating material 33 a with the coating caulking portion 35. Then, the connection terminal 31 connected to the electric wire 33 is screwed into the screw insertion hole 32a as shown in FIG.
6, the connection part 37 of the other party to be connected,
For example, it is screwed and fixed to a terminal portion of a bus bar or a connection portion of an electronic device or the like. As a result, the electric wire 33 and the connection portion 37
Are electrically connected.

[0005]

However, the above-described conventional connection terminal 31 is different from the connection portion 32 in that the coating caulking portion 3
5 is flat, and when the core wire 33b is crimped to the conductor crimping portion 34, the core wire 33b is necessarily bent by the thickness of the covering material 33a, and the bent portion of the core wire 33b is bent. Some parts were cut off.
As described above, when a part of the core wire 33b is cut, the electric resistance increases, and there is a problem in that heat is generated during energization, which causes deterioration of the core wire.

As a means for solving the above problem, the distance between the conductor caulking portion 34 and the covering caulking portion 35 is increased,
Although it is conceivable to relax the bending of the core wire 33b, this configuration increases the size of the entire connection terminal 31. Further, since the space between the connection portion 32 and the conductor caulking portion 34 is flat and has a narrow width, for example, when the covering material 33a of the connection terminal 31 is pulled upward in FIG. There was a problem of bending.

SUMMARY OF THE INVENTION The present invention has been made in consideration of the above problems, and has as its object to prevent a core wire crimped by a conductor crimping portion from being broken and to have a high-strength screw connection terminal which is not easily deformed. Is to provide.

[0008]

SUMMARY OF THE INVENTION The object of the present invention is to provide a connecting portion having a screw insertion hole which is screwed and fixed to a mating connecting portion, and a covering of an end portion of an electric wire continuously provided behind the connecting portion. A conductor caulking portion for caulking the core wire exposed by peeling the material, and a covering caulking portion continuously provided adjacent to the rear portion of the conductor caulking portion and caulking an end of the covering material. In the screwing connection terminal, the connection portion and the bottom surface of the covering caulking portion are formed flush with each other, and the conductor caulking portion is set at a high position with respect to the bottom surface. This can be solved by connecting terminals.

According to the screw connection terminal having the above structure,
Since the bottom surfaces of the connection portion and the cover caulking portion are flush with each other, and the conductor caulking portion is set at a high position with respect to the bottom surface, the core wire is caulked to the conductor caulking portion. It is crimped to the conductor crimping portion without being substantially bent.
Therefore, breakage of the core wire at the time of crimping the electric wire can be reliably prevented.

[0010] In the screw connection terminal,
Preferably, a first reinforcing portion is provided by bending both sides in the width direction of the sloped first connecting portion connecting the connecting portion and the conductor caulking portion, and the conductor caulking portion and the covering caulking portion are provided. The second connecting portion is formed by bending both sides in the width direction of the inclined second connecting portion for connecting the second connecting portion.

According to the screwing connection terminal having the above-described structure,
The first and second connecting portions are formed in a U-shaped or U-shaped cross section by the first and second reinforcing portions. Therefore, even if an external force is applied from the width direction and the thickness direction of the connection terminal, it is not easily deformed, and the material or thickness is not changed even though the conductor caulking portion is formed at a high position. The strength of the connection terminal can be significantly improved.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of a screw connection terminal according to the present invention will be described below in detail with reference to FIGS. FIG. 1 is a perspective view showing a first embodiment of the screw connection terminal of the present invention, FIG. 2 is a sectional view showing the configuration of the screw connection terminal in FIG. 1, and FIG. FIG. 4 is a cross-sectional view showing the configuration, and FIG. 4 is a cross-sectional view showing the configuration of the coating caulking section in FIG.

As shown in FIG. 1, a screw connection terminal (hereinafter simply referred to as a connection terminal) 1 of this embodiment is formed by stamping a single metal plate, From the connection portion 2, the first connection portion 3,
The conductor caulking portion 4, the second connecting portion 5, and the covering caulking portion 6 are integrally connected.

The connecting portion 2 has a circular planar shape and a screw insertion hole 2a formed in the center. And the connection part 2
A first connecting portion 3 having a narrow width is formed upward from an end of the first connecting portion 3 and a conductor connecting portion 4 is continuously provided behind the first connecting portion 3. The conductor connecting portion 4 is provided with a covering material 11b at the end of the electric wire 11.
For crimping the exposed core wire 11a. As shown in FIG. 3, the bottom is formed in a circular shape, and substantially triangular locking pieces 4a and 4b are provided on both sides. The dimensions of the conductor connection portion 4 are set according to the diameter of the core wire 11a, and the lengths of the locking pieces 4a and 4b are set to dimensions that allow the core wire 11a to be clamped from both sides.

A second connecting portion 5 having a narrow width downward is formed behind the conductor caulking portion 4 in a slope shape, and a covering connection portion 6 is provided continuously behind the second connecting portion 5. Cover connection 6
Is for caulking the end of the covering material 11b of the electric wire 11. The bottom is formed in a circular shape as shown in FIG. 4, and substantially triangular locking pieces 6a and 6b are provided on both sides. The dimensions of the covering connection portion 6 are determined by the core wire 11 a and the covering material 11.
b is set according to the diameter of the electric wire 11 including the
The lengths of a and 6b are set to dimensions that allow the entire electric wire 11 to be sandwiched and crimped from both sides.

Next, a procedure for crimping the electric wire 11 to the connection terminal 1 will be described. The shapes of the conductor crimping portion 4 and the sheath crimping portion 6 of the connection terminal 1 before crimping are shown by imaginary lines in FIG. 1 and locked by solid lines in FIGS. 3 and 4. The pieces 4a, 4b, 6a, 6b are bent upright. Therefore, both the conductor caulking part 4 and the sheath caulking part 6 have a U-shape with an upper opening.

First, the covering material 11b at the end of the electric wire 11 is peeled off to expose a predetermined length of the core wire 11a.
1a into the conductor caulking portion 4 and the covering material 11b
The end is inserted into the cover caulking portion 6. Next, as shown by a solid line in FIG.
By crimping a, 4b, 6a, and 6b along the outer periphery of the core wire 11a and the covering material 11b, the electric wire 11 and the connection terminal 1 are connected to be able to conduct electricity and cannot come out.

It should be noted that, as shown in FIG.
That is, the bottom surface of the connection portion 2 that comes into contact with the connection portion 15 of the other party and the bottom surface of the covering caulking portion 6 that is also in contact with the connection portion 15 are flush with each other. Also, the conductor caulking part 4
Is raised at a high position with respect to the bottom surface, for example, by a height substantially equivalent to the thickness of the coating material 11b. For this reason,
When the core wire 11a is crimped, the core wire 11a is not bent toward the bottom surface, and a part of the core wire 11a is not strongly pulled and disconnected. Therefore, connection terminal 1
The state of connection between the wire and the electric wire 11 does not become high resistance. Even if a high current is applied, heat generation is small, and deterioration of the core wire 11a and occurrence of an accident can be prevented.

Next, a procedure for attaching the connection terminal 1 to the connection part 15 of the other party will be described. As shown in FIG.
The connection terminal 1 to which the connection terminal 1 is connected is fastened and fixed to an end of a connection portion 15 of the other party, for example, an end of a bus bar or a connection portion of an electronic device by a screw 17 via a washer 16.
In the state where the screws are fixed in this manner, the entire lower surfaces of the connecting portion 2 and the cover caulking portion 6 come into contact with the connecting portion 15, so that
Although the conductor crimping portion 4 floats from the connection portion 15, both sides are stably supported. For this reason, the conductor caulking part 4
Of the core wire 11 due to the bending.
It is possible to prevent the core wire 11a from being broken by the pulling of a, and to improve the reliability of the device using the connection terminal 1.

As shown in FIG. 3 and FIG. 4, the bottoms of the conductor caulking portion 4 and the sheath caulking portion 6 are entirely curved, and locking pieces 4a, 4b, 6a, 6b, it is not easily deformed even if vibration is applied during caulking or during use.

Next, the second connection terminal for screw connection of the present invention will be described.
An embodiment will be described in detail with reference to FIGS. The difference from the first embodiment is that the connecting portions 3 and 5 are provided with reinforcing portions. Members having the same configuration are denoted by the same reference numerals and description thereof is omitted. FIG. 5 is a perspective view showing the configuration of the connection terminal of the present embodiment, and FIG. 6 is a cross-sectional view showing the configuration of the connecting portion in FIG.

As shown in FIG. 5, the connection terminal 21 of the present embodiment is provided with first reinforcing portions 3a and 3b by cutting and raising both side surfaces of the first connecting portion 3 in the width direction. The connecting portion 3 is formed in a U-shaped or U-shaped cross section. The first reinforcing portions 3 a and 3 b are formed so as to hang not only on both side surfaces of the first connecting portion 3 but also on a part of the outer periphery of the connecting portion 2.

Further, both side surfaces in the width direction of the second connecting portion 5 are cut and raised to provide second reinforcing portions 5a and 5b.
Therefore, as shown in FIG.
By providing a and 5b, it is formed in a U-shaped or U-shaped cross section. Therefore, the connection terminal 21 for screwing can obtain the strength which is hard to be deformed in both the thickness direction and the width direction by providing the first reinforcing portions 3a, 3b and the second reinforcing portions 5a, 5b. .

In the connection terminal 21 of the present embodiment, the electric wire 11 similar to that of the first embodiment is crimped, and
1 and the connection terminal 21 are electrically connected to each other. In the present embodiment, the first connecting portions 3 are provided with the first reinforcing portions 3a and 3b, and the second connecting portions 5 are provided with the second reinforcing portions 5a and 5b. And reinforced both in the width direction. Accordingly, the entire strength of the connection terminal 21 from the connection portion 2 to the coating caulking portion 6 is increased, and during the caulking operation or at the time of attachment to the mating connection portion 15, an unexpected force is applied from above, for example, after the attachment. Even if it is pulled or strongly pulled, it is not easily deformed, and a highly reliable connection terminal can be obtained.

The connection terminal for screwing of the present invention is not limited to the above-described embodiments, but can be applied to an appropriately modified embodiment. For example, the bottoms of the two connecting portions may be curved similarly to the bottoms of the conductor caulking portion and the cover caulking portion. In addition, since the conductor caulking portion and the cover caulking portion are provided with locking pieces on both sides, sufficient strength can be obtained even if the bottom portion is formed in a flat plate shape.

[0026]

As described above, according to the connection terminal for screwing of the present invention, the connecting portion and the bottom surface of the covering caulking portion are formed flush with each other, and the conductor caulking portion is positioned higher than the bottom surface. Since the core wire is set at the position, the core wire is not bent when the core wire is crimped to the conductor caulking portion, and disconnection of the core wire at the time of caulking can be reliably prevented.

[0027] A first reinforcing portion is provided by bending both sides in the width direction of the sloped first connecting portion connecting the connecting portion and the conductor caulking portion, and the conductor caulking portion and the coating caulking portion are provided. The second reinforcing portion is provided by bending both sides in the width direction of the inclined second connecting portion that connects the second reinforcing portion and the second reinforcing portion. Therefore, even if an external force is applied from the width direction and the thickness direction of the connection terminal, it is not easily deformed, and the material or thickness is not changed even though the conductor caulking portion is formed at a high position. The strength of the connection terminal can be significantly improved.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a first embodiment of a screw connection terminal according to the present invention.

FIG. 2 is a cross-sectional view showing a mounting state of a screw connection terminal in FIG. 1;

FIG. 3 is a cross-sectional view showing a configuration of a conductor caulking portion in FIG.

FIG. 4 is a cross-sectional view showing a configuration of a coating caulking section in FIG.

FIG. 5 is a perspective view showing a second embodiment of the screw connection terminal according to the present invention.

FIG. 6 is a cross-sectional view showing a configuration of a second connecting portion in FIG.

FIG. 7 is a perspective view showing the configuration of a conventional screw connection terminal.

8 is a cross-sectional view showing a mounting state of the screw connection terminal in FIG. 7;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Connection terminal for screwing (1st Embodiment) 2 Connection part 2a Screw insertion hole 3 First connection part 3a, 3b First reinforcement part 4 Conductor crimping part 4a, 4b Locking piece 5 Second connection part 5a, 5b Second reinforcing portion 6 Coating and crimping portion 6a, 6b Locking piece 11 Electric wire 11a Core wire 11b Coating material 15 Connection portion 16 Screw 21 Screw connection terminal (second embodiment)

Claims (2)

[Claims] 1. A connecting part having a screw insertion hole screwed and fixed to a connecting part of a mating part, and a core wire continuously provided behind the connecting part and peeling a covering material of an end of the electric wire and exposing the core wire. A screw connection terminal comprising: a conductor crimping portion to be tightened; and a covering crimping portion continuously provided adjacent to a rear portion of the conductor crimping portion and crimping an end of the covering material. A connection terminal for screwing, wherein a bottom surface of the cover caulking portion is flush with the conductor caulking portion and the conductor caulking portion is set at a high position with respect to the bottom surface. 2. A first connecting portion having a slope, which connects the connecting portion and the conductor caulking portion, is bent at both sides in a width direction to form a first connecting portion.
A reinforcing portion is provided, and a second reinforcing portion is provided by bending both sides in a width direction of a sloped second connecting portion connecting the conductor caulking portion and the covering caulking portion. The connection terminal for screwing according to 1.