JPH044576A - Lock terminal for wire connection - Google Patents

Abstract

PURPOSE:To enhance the working easiness in connecting an insulated wire and also reliance upon the contact, simplify the structure, and reduce the manufacturing costs by furnishing a pressing part with a strand guide surface, which inclines toward the strand receiving surface of the part to be pressed and leads the strand into a non-screw terminal, and providing a projection contacting the side face of the part pressed on each side of the strand guide surface. CONSTITUTION:Strand 6b presses to a pressing part 5 is guided by a strand guide surface 5a into a non-screw terminal. This allows accomplishing connection only through twisting process of strand 6b after stripping the insulative covering 6a. Because the strand 6b is inserted into a closed space bounded by the pressing part 5, projection 5b, and part to be pressed 4, eventually connected strand 6b in the condition with unsatisfactory twisting does not cause any part thereof to extrude out of the terminal to result in flattening, and the contacting pressure with strand 6b can be secured sufficiently, and electric connection as well as mechanical fixation of insulated wire is ensured. This allows accomplishing the working easiness in connecting the insulated wire and also reliance upon the contact, simplifying the structure, and reducing the manufacturing costs.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a locking terminal for connecting electric wires used as a wiring device or the like for connecting insulated electric wires formed of stranded wires and an insulating film.

2. Description of the Related Art An example of a conventional screwless terminal will be described with reference to FIG. This screwless terminal is formed of a flat plate-shaped receiving part 1 and a flat plate-shaped movable piece 2 that elastically contacts this receiving part 1.

When connecting an insulated wire to this screwless terminal, before making the connection, the insulation film of the insulated wire is stripped off, the exposed stranded wire 3 is twisted, and the twisted portion is soldered.

Then, apply force to the movable piece 2 with a screwdriver or the like to
A gap is formed between the movable piece 2 and the stranded wire 3 which has undergone the soldering process described above and is inserted into this gap, and then the force applied to the movable piece 2 is released. At this time, the stranded wire 3 is sandwiched between the receiving portion 1 and the movable piece 2, and electrical connection and mechanical fixation thereof are performed.

On the other hand, there is a screwless terminal as shown in FIG. 13 which is different from this. This screwless terminal has a V-shaped notch 2a formed in the movable piece 2 shown in FIG.

This screwless terminal is made by removing the insulation coating from the insulated wire.
The connection can be made simply by twisting the exposed stranded wires 3. This means that the connected strands 3 are connected to the notch 2.
This is because the contact pressure with a is concentrated at the center of the movable piece 2. Therefore, in the case of this screwless terminal, there is no need to solder the stranded wires 3 as described above.

Furthermore, as shown in FIG. 14, there is a movable piece 2 shown in FIG. 13 in which a stranded wire guide surface 2b having a 7-shaped cross section is formed.

With this screwless terminal, when connecting the stranded wires, the stranded wire guide surface 2b
Since the strands 3 are guided inside the terminal, the connection workability is improved.

Problems to be Solved by the Invention In the case of a screwless terminal in which the stranded wires 3 to be connected are soldered, the processing requires time and effort.

Furthermore, the contact reliability between the solder surface and the terminal is inferior to the contact reliability between the twisted wire 3 formed of a core wire such as a copper wire and the terminal.

In addition, in the case of a screwless terminal in which the stranded wire 3 is twisted and the connection is made without soldering, a part of the core wire forming the stranded wire 3 protrudes from the terminal and the stranded wire 3 becomes flat, and at the same time, the contact pressure In some cases, the stranded wire 3 may easily come off from the terminal due to insufficient amount.

Means for Solving the Problem In a locking terminal for connecting electric wires in which the stranded wires exposed by peeling off the insulating film are sandwiched between a pressing part and a pressed part to make a connection, the stranded wire receiving surface of the pressed part is A stranded wire guide surface is provided on the pressing part that is inclined toward the direction and guides the stranded wire into the inside of the terminal, and protrusions that contact side surfaces of the pressed part are provided on both sides of the stranded wire guide surface in this pressing part, respectively. Ta.

The stranded wire pressed by the action pressing portion is guided into the terminal by the stranded wire guide surface. As a result, the connection can be made by simply twisting the stranded wires after peeling off the insulating film, thereby improving the workability of connecting the insulated wires and the reliability of their contact. Furthermore, since the stranded wire is inserted into a closed space formed by the pressing part, its protruding part, and the pressed part, if the stranded wire is connected with insufficient twisting. A part of the insulated wire will not protrude from the terminal and become flat, and sufficient contact pressure with the stranded wire can be ensured. In other words, the electrical connection and mechanical fixation of the insulated wire can be reliably achieved. Furthermore, it is possible to reduce the risk of short circuit accidents between different poles due to a part of the stranded wire protruding from the terminal. Furthermore, since the structure is simple, manufacturing costs can be reduced.

Embodiment An embodiment of the present invention will be explained based on FIGS. 1 to 10. As shown in FIGS. 1 to 7, this screwless terminal as a locking terminal for connecting electric wires has a receiving part 4 as a pressed part and a pressing part that elastically contacts this receiving part 4. It is formed by a movable piece 5.

However, the movable piece 5 is formed with a stranded wire guide surface 5a having a 7-shaped cross section and inclined toward the stranded wire receiving surface 4a of the receiving portion 4, and furthermore, the stranded wire guide surface 5a in the movable piece 5 is Projections 5b that contact the side surfaces 4b of the receiving portion 4 are formed on both sides of the wire guide surface 5a, respectively.

Moreover, this screwless terminal includes the receiving portion 4 and the movable piece 5.
are formed by integral molding, and a connecting bottle 4c is formed at the bottom by cutting and bending. Furthermore, a notch 5 in the shape of a 7 is provided at the tip of the stranded wire guide surface 5a.
c is formed.

In such a configuration, as shown in FIG. 8, when connecting the insulated wires 6, the insulating film 6a is peeled off and the twisted strands 6b are pressed against the stranded wire guide surface 5a of the movable piece 5. . At this time, the stranded wire 6b is guided to the center of the stranded wire receiving surface 4a by the stranded wire guide surface 5a and is inserted into the terminal.

Furthermore, as shown in FIG. 9, after the tip of the stranded wire 6b passes the tip of the stranded wire guide surface 5a of the movable piece 5, the insulated wire 6 is pulled in the opposite direction to the insertion direction, as shown in FIG. As shown in FIG. 2, the tip of the stranded wire guide surface 5a bites into the stranded wire 6b, thereby electrically connecting and mechanically fixing the insulated wire 6.

Here, a terminal block for a board using such a screwless terminal will be explained based on FIG. 11. This board terminal block has the above-mentioned screwless terminal arranged inside the casing 7, and has a wire insertion lower a formed on the upper part of the stranded wire guide surface 5a in FIG. A release button 7b is provided at the top.

This release button 7b is formed to be movable in the direction of insertion of the insulated wire.

With this board terminal block, insulated wires can be connected by simply inserting a twisted wire at the tip into the wire insertion lower a, and by pulling the insulated wire while pressing the release button 7b. It can be easily removed.

In this way, the stranded wire 6b inserted into the movable piece 5 is guided inside the terminal by the stranded wire guide surface 5a, so that the insulating coating 6a
After peeling, the stranded wires 6b can be connected by simply twisting them without soldering, and therefore the workability of connecting the insulated wires 6 and their contact reliability are improved.

Further, the stranded wire 6b is connected to the movable piece 5, its protruding portion 5b, and the receiving portion 4.
It is inserted into the closed space formed by
To ensure sufficient contact pressure with the stranded wire 6b without causing a part of the stranded wire 6b to protrude from the terminal and become flat even when the stranded wire 6b is connected with insufficient twisting. In other words, the electrical connection and mechanical fixation of the insulated wire 6 can be reliably performed, and at the same time, there is a risk of a short circuit between different poles due to a part of the stranded wire 6b protruding from the terminal. can be made smaller.

In the case of this embodiment, since a 7-shaped notch 5C is formed at the tip of the stranded wire guide surface 5a, the connected stranded wire 6b is pushed into the center of the movable piece 5 by contact pressure with the notch 5c. concentrate. Therefore, the electrical connection and mechanical fixation of the insulated wire 6 are quite strong.

Furthermore, since the structure of the screwless terminal itself is simple, its manufacturing cost can be reduced.

In this embodiment, a screwless terminal formed by integral molding has been described, but the present invention is not limited to this, and a terminal in which the receiving part 4 and the movable piece 5 are provided separately may also be implemented. I can do it.

Effects of the Invention As described above, the present invention provides a locking terminal for connecting electric wires in which a stranded wire exposed by peeling off an insulating film is sandwiched between a pressing part and a pressed part to make a connection. A stranded wire guide surface that is inclined toward the wire receiving surface and guides the stranded wire into the inside of the terminal is provided in the pressing part, and a protrusion that contacts the side surface of the pressed part is provided on both sides of the stranded wire guide surface in the suppressing part. Since the strands are respectively provided, the stranded wire pressed by the pressing section is guided into the inside of the terminal by the stranded wire guide surface. As a result, the connection can be made by simply twisting the stranded wires after peeling off the insulating film, thereby improving the workability of connecting the insulated wires and the reliability of their contact. Furthermore, since the stranded wire is inserted into a closed space formed by the pressing part, its protruding part, and the pressed part, if the stranded wire is connected with insufficient twisting. A part of the insulated wire will not protrude from the terminal and become flat, and sufficient contact pressure with the stranded wire can be ensured. In other words, the electrical connection and mechanical fixation of the insulated wire can be reliably achieved. Furthermore, it is possible to reduce the risk of short circuit accidents between different poles due to a part of the stranded wire protruding from the terminal. Furthermore, since the structure is simple, manufacturing costs can be reduced.

[Brief explanation of drawings]

Fig. 1 is a perspective view showing an embodiment of the present invention, Fig. 2 is a plan view thereof, Fig. 3 is a left side view thereof, Fig. 4 is a front view thereof,
Fig. 5 is a right side view, Fig. 6 is a bottom view, Fig. 7 is an enlarged cross-sectional view of the connecting part of the stranded wires, and Fig. 8 is an enlarged view of the connecting part when the stranded wires are inserted. 9 is an enlarged cross-sectional view showing the connecting part just before the stranded wires are fixed, FIG. 10 is a plan view after the stranded wires are fixed, and FIG. A vertical cross-sectional view showing the formed board terminal block, FIG. 12 is an enlarged plan view showing the stranded wire connection part in a conventional screwless terminal, and FIG. 13 is a stranded wire connection part in another conventional example. FIG. 14 is an enlarged plan view showing a connecting portion of stranded wires in a further different conventional example. 4... Pressed part, 4a... Twisted wire receiving surface, 5... Pressing part, 5a... Twisted wire guide surface, 5b... Projection part, 6...
・Insulated wire, 6a...Insulating film, 6b...Twisted wire Applicant: Tokyo Electric Co., Ltd. (Tenyo 1 Ichiatsu) Figure 37, %, Figure 3, Figure 3u, Figure 15, One Plan, Figure 6 Old] " figure

Claims (1)

[Claims] In a locking terminal for connecting electric wires in which a stranded wire exposed by peeling off an insulating film is sandwiched between a pressing part and a pressed part to make a connection, the stranded wire is inclined toward a stranded wire receiving surface of the pressed part. A stranded wire guide surface for guiding the wire into the inside of the terminal is provided in the pressing part,
A locking terminal for connecting an electric wire, characterized in that the pressing part is provided with protruding parts on both sides of the stranded wire guide surface, each of which contacts a side surface of the pressed part.