JPH04352B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to a connector for connecting electric wires together, for example, in a joint box or in a machine.

[Background technology]

Conventionally, this type of connection between electric wires has been made by making a terminal connection such as a clasping connection or a grip connection, and then performing tape processing. However, such a connection is extremely inefficient. Therefore, a connector was developed that allows connections by simply inserting the wire. In other words, this connector has an opening formed on the side of a box-shaped casing, a U-shaped terminal frame inserted into this opening, and a plurality of locking springs placed sideways in this U-shaped terminal frame. The structure was such that they were inserted one after another, and then the opening was closed with a lid. To connect the wires, peel off the wire coating to expose the core wires, insert the core wires into the wire insertion holes provided in the casing, and press the inserted core wires into the U-shaped terminal frame using the pressing piece of the locking spring. It was designed to connect multiple electric wires via a terminal frame by pressure contacting the terminal frame. However, such connectors are difficult to adapt to automated manufacturing because they are inserted into the casing with the locking spring facing sideways.

[Purpose of the invention]

The object of the invention is to provide a connector that is easy to automate.

[Disclosure of the invention]

This invention provides a casing having a cylindrical shape with a bottom and a cover mounting piece on the opening edge of the bottomed cylindrical shape;
A cylindrical terminal frame is fitted into the casing with one opening of the casing aligned with the bottomed cylindrical opening of the casing, and one end is formed into a locking piece and the other end is a pressing piece. a locking spring formed in the cylindrical terminal frame and disposed within the cylindrical terminal frame with its longitudinal direction aligned with the axial direction of the terminal frame; and a cover at the edge of the opening so as to close the bottomed cylindrical opening of the casing. A cover that is mounted and fixed by a mounting piece, and an electric wire insertion hole formed in the bottom of the bottomed cylindrical shape of the casing or in a part of the cover that corresponds to the locking piece of the locking spring. The gist of this is a connector that has been installed.

In other words, this connector, as before,
The locking spring is not inserted horizontally, but vertically (with its longitudinal direction aligned with the axial direction), making it easier to automate.

Next, the present invention will be explained in detail based on examples.

FIG. 1 is an exploded perspective view of an embodiment of the present invention, and FIG. 2 is a perspective view of FIG. 1 viewed from the direction of arrow A. In these figures, reference numeral 1 denotes a casing in the shape of a rectangular cylinder with a bottom, and a plurality of wire insertion holes 2 are formed in the bottom of the rectangular cylinder with a bottom. Reference numeral 3 denotes a square tubular terminal frame, which is inserted into the casing 1 through the bottomed square tubular opening of the casing 1 . Reference numeral 4 denotes a locking spring having one end formed as a locking piece 5 and the other end formed as a pressing piece 6. are placed upside down. In this case, the locking piece 5 of the locking spring 4 comes to face the wire insertion hole 2 provided at the bottom of the casing 1. Reference numeral 7 denotes a cover that closes the bottomed rectangular cylindrical opening of the casing 1, and a wire end accommodating recess 8 corresponding to the wire insertion hole 2 provided at the bottom of the casing 1 is formed on the inner circumferential surface of the cover.

This connector is assembled as follows. That is, the terminal frame 3 is inserted into the bottomed rectangular cylindrical opening of the casing 1 as shown by the arrow, and then the locking springs 4 are alternately turned upside down and the longitudinal direction is aligned with the axis of the terminal frame 3. This is done by inserting it in the correct direction (vertical state) and then closing the opening in the shape of a rectangular cylinder with a bottom with the cover 7. In this case,
To attach the cover 7, align the outer peripheral edge of the cover 7 with the cover attachment piece 7a provided in the bottomed rectangular cylindrical opening of the casing 1, and then attach the cover attachment piece 7a as shown in FIG. This is done by applying pressure to the cover 7a while ultrasonically heating it with an ultrasonic horn 9 having the shape shown in the figure, and holding the outer peripheral edge of the cover 7 with the cover mounting piece 7a as shown in FIG. In this way, this connector has the cover 7 firmly attached to the casing 1.
As shown in the figure, even if the core wire 11 of the electric wire 10 is inserted through the wire insertion hole 2 and its tip strongly presses against the recess 8, the cover 7 will not come off. In this case, the core wire 11 is pressed against the terminal frame 3 by the locking piece 5 and the pressing piece 6 when the core wire 11 is inserted. As a result of the core wire 11 being pressed against the terminal frame 3 in this way, a plurality of electric wires 1
0 is now connected via the terminal frame 3.

The cover 7 is entirely made of transparent resin, and as shown in FIG. 2, its surface is satin-finished except for the portion corresponding to the wire end receiving recess 8. Therefore, when the tip of the core wire 11 reaches the wire end accommodation recess 8, the tip appears as a shadow on the transparent part, indicating that the core wire 11 has been pushed deep enough and the connection is complete. You will be able to confirm this.

As shown in FIG. 6, if the cover 7 is provided with a notch 12 as shown, the notch 12 will become the voltage detection window 13 (FIG. 7) after it is assembled, so the voltage detection Connect the tester pin 14 to its voltage detection window 1.
3 and makes it contact with the terminal frame 3 etc., it becomes possible to inspect whether or not the electric wire 10 is properly connected. That is, even if the wire 10 is inserted into the wire insertion hole 2 of the casing 1 and the wire insertion hole 2 is blocked, the connection state can be confirmed through the voltage detection window 13. In this case, the direction in which the voltage detection tester pin 14 is inserted is opposite to the direction in which the electric wire 10 is inserted, making the work easier.

Further, as shown in FIGS. 8 and 9, a notch 12 is provided at the end of the opening of the terminal frame 3 on the casing 1 side.
a, and a protrusion 1 corresponding to the notch 12a is provided on the inner surface of the bottom of the bottomed rectangular cylinder of the casing 1.
5a so that they mesh when the terminal frame 3 is inserted, and protrusions 16 are provided along the longitudinal direction on the internal upper and lower surfaces of the casing 1 so that the terminal frame 3 is pressed by the protrusions 16. Alternatively, the terminal frame 3 may be temporarily fixed. By doing this, even if the casing 1 is transported with the terminal frame 3 inserted therein, the casing 1 can be transferred to the terminal frame 3.
will not come off. Furthermore, as described above, the fitting between the notch 12a provided in the terminal frame 3 and the convex portion 15a provided in the casing 1 prevents the terminal frame 3 from being inserted into the casing 1 in the reverse direction. sell. That is, on the outside of the terminal frame 3, a reinforcing rib 17 is provided along the opening edge on the opposite side from the casing 1 to prevent the terminal frame 3 from bulging when the core wire is inserted, and the reinforcing rib 17 is fully effective at this position. do. Therefore, if it is inserted in the opposite direction, the bulge prevention effect will not be exhibited. Reference numeral 18 denotes a guide rib that acts as a guide when inserting the core wire.

Note that even if the terminal frame 3 is bent as shown by the chain line in FIG. 10 when the core wire 11 is inserted, the protrusion 16 provided inside the casing 1 will hold the vicinity of the corner of the terminal frame 3. Therefore, almost no force is applied to the casing 1 due to the bulge of the terminal frame 3.

In addition, by forming a non-slip stepped portion 19 as shown in the figure on the outer peripheral surface of the casing 1, as shown in FIG. 11, when connecting the electric wire 10, as shown in FIG. By doing so, an anti-slip effect can be obtained. Therefore, safe wiring work can be performed.

Furthermore, by forming a satin-finished surface 20 on the outer circumferential surface of the casing 1 as shown in FIG. 13, characters can be written on the satin-finished surface 20 with a pencil, marker pen, or the like. That is,
Without such a satin-finished surface 20, even if characters are written, they will be rubbed by fingers etc. during wiring work and will disappear.However, by forming the satin-finished surface 20, the characters will not disappear during wiring work. It disappears.

In the above embodiment, the wire insertion hole 2 is provided at the bottom of the casing 1 in the shape of a rectangular tube, but it may be provided in the cover 7. In this case, it is necessary to form the electric wire end receiving recess 8 in the inner part of the bottom of the casing 1 in the shape of a rectangular cylinder. Further, the shape of the casing 1 is not limited to a prismatic shape.

〔Effect of the invention〕

As described above, since the connector of the present invention can be inserted with the locking spring in a vertical position, it can be easily automated. Moreover, since the cover is firmly fixed by the cover attachment piece, even if the cover is poked by the tip of the electric wire during wiring, the cover will not come off from the casing.

[Brief explanation of drawings]

FIG. 1 is an exploded perspective view of an embodiment of the present invention, FIG. 2 is a perspective view of FIG. 1 viewed from the direction of arrow A, FIGS. Figure 5 is a longitudinal sectional view of the state in use, Figures 6 and 7 are explanatory diagrams of forming a voltage detection window on the cover,
Figures 8 to 10 are explanatory diagrams for temporarily fixing the terminal frame and preventing reverse assembly; Figures 11 and 12 are explanatory diagrams for forming a non-slip prevention step on the casing;
Figures 1 and 14 are explanatory diagrams in which the casing has been given a satin finish so that writing can be written on it. DESCRIPTION OF SYMBOLS 1... Casing, 2... Wire insertion hole, 3... Terminal frame, 4... Locking spring, 5... Locking piece, 6... Pressing piece, 7
...Cover, 7a...Cover mounting piece.

Claims (1)

[Claims] 1. A casing having a bottomed cylindrical shape and having a cover attachment piece on the edge of the bottomed cylindrical opening, and one opening of the casing in the bottomed cylindrical opening. A cylindrical terminal frame that is fitted into the casing in the aligned state, one end of which is formed as a locking piece and the other end of which is formed as a pressing piece, is inserted into the cylindrical terminal frame in the longitudinal direction of the terminal frame. a locking spring disposed along the axial direction; a cover mounted and fixed by a cover mounting piece on the edge of the opening so as to close the bottomed cylindrical opening of the casing; and a bottomed cylindrical opening of the casing. A connector comprising an electric wire insertion hole formed in a cylindrical bottom or a portion of the cover corresponding to the locking piece of the locking spring. 2. The connector according to claim 1, wherein the portion of the cover corresponding to the locking piece is transparent. 3. The connector according to claim 1 or 2, wherein the cover has a notch for a voltage detection window. 4. The connector according to any one of claims 1 to 3, wherein the terminal frame and the casing are provided with a notch hole and a convex portion for preventing reverse assembly of the terminal frame. 5. The connector according to any one of claims 1 to 4, wherein a non-slip step is formed on the casing. 6. The connector according to any one of claims 1 to 5, wherein the casing has a matte surface for writing characters.