JPH0737258Y2 - Shielded wire terminal connector - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a connector used for a terminal portion of a noise-preventing shielded wire.

[Conventional technology]

As shown in FIG. 13 (a), the shielded wire a is provided with a braided wire c formed by knitting a thin electrically conductive wire on the outer side of an insulation-coated inner wire b, and further with an outer insulating layer d on the outer side thereof. It has a covered structure. The electrically conductive braided wire c shields electrical noise between the extension b and the outside.

In order to connect such a shielded wire a to a connector or the like, the braided wire c as well as the insulated inner wire b must be connected to other electric wires. ) To (e), the end of the shielded wire was processed.

First, as shown in FIG. 13 (a), the outer insulating layer d at the end of the shielded wire a is peeled off to a desired size. Next, a hole c'is formed as shown in FIG. 2B so as not to cut the thin electric wire which constitutes the braided wire c, and an insulating coated wire is formed from the hole c'as shown in FIG. Withdraw. After this, the same figure (d)
As shown in FIG. 4, twist is applied to the braided wire c, and the other end of the insulated wire e is caulked and connected by a terminal e ′. Finally, as shown in FIG. 7E, the tape winding f is used for insulation. After that, a terminal metal fitting (not shown) is attached to the tips of the extension wire b and the other electric wire e, accommodated in a connector or the like, and connected to the electric wire of the other side.

[Problems to be solved by the device]

However, in the above-mentioned conventional technique, when the hole c ′ is formed in the braided wire c, the braided wire c may be cut. Further, there is a problem that a work for connecting the braided wire c and the other electric wire e at the terminal e ′ and a dedicated device for crimping the terminal e ′ are required, and the tape winding work takes a very long time. It was

The present invention has been made in view of the above facts, and an object of the present invention is to provide a connector for a terminal portion of a shielded wire which is easy to work without fear of cutting the braided wire c.

[Means for Solving the Problems]

In order to achieve the above object, the present invention is used for an end portion of a shielded wire in which an insulating coated inner wire is covered with a conductive braided wire and the braided wire is covered with an outer insulating layer. A tubular body that fits into the tubular body, and a main body portion that presses the braided wire folded at the end of the external insulating layer between the tubular body and the connecting portion for connecting to an external electric wire. A cylindrical terminal,
A configuration including a tubular case that accommodates and locks the tubular body and the tubular terminal is adopted.

Further, a structure is employed in which the shield wire and the cylindrical case are watertightly engaged with each other by an elastic member such as packing.

Further, a cylindrical body which is used for an end portion of a shielded wire in which an inner wire coated with insulation is covered with a conductive braided wire and the braided wire is covered with an outer insulating layer, and which fits into the outer insulating layer, It is also possible to have a structure in which a braided wire exposed at an end of the external insulating layer is sandwiched between the tubular body and the main body portion that is pressed into contact with the tubular body, and a tubular terminal having a connection portion for connecting to an external electric wire.

In this case, it is desirable that the connecting portion between the cylindrical body mounted on the end of the shielded wire and the cylindrical terminal is covered with a molded waterproof resin layer.

〔Example〕

 An embodiment of the present invention will be described below with reference to the drawings.

As shown in FIG. 1, the shielded wire terminal connector A of the present invention includes a tubular body 5, a conductive tubular terminal 6, and a tubular case 7 for covering the tubular body 5 and the tubular terminal 6. And a waterproof plug 8 fitted to the left end of the tubular case 7, and a rear holder 9 fitted to the right end. A wire 10 parallel to the inner wire 2 is an external wire, and a terminal 11 attached to the tip of the wire 10 is connected to a tab-shaped connecting portion 6a connected to the tubular terminal 6 to be electrically connected to the braided wire 3.

As shown in FIGS. 2 (a) and 2 (b), the tubular body 5 has a tubular base 5a made of an elastic material such as silicon rubber, and a cylindrical conductive tube made of metal and having a tapered tip. 5b is planted. The conductive tube 5b is provided with a slit 5c, and the tip diameter d of the tapered portion is formed to be slightly larger than the outer diameter of the shielded wire 1 so that the variation in the thickness of the shielded wire 1 can be dealt with. ing. Further, ribs 5d are provided on the inner and outer surfaces of the base portion 5a, and the outer insulating layer 4 of the shielded wire 1 is provided.
Also, it can be fitted in a watertight manner with the cylindrical case 7.

As shown in FIG. 3, the tubular terminal 6 is made of a conductive material such as metal, and has a tapered main body portion 6b similar to the above-mentioned conductive tube 5b, and extends from here via a bus bar 6c. The tab-shaped connecting portion 6a is integrally formed. In addition, a slit similar to the slit 5c of the conductive cylinder 5b is formed in the main body portion 6b so that the inner diameter is slightly smaller than that of the conductive cylinder 5b.
It may be configured such that it can be pressed against the conductive tube 5b by its own elasticity.

The cylindrical case 7 is made of an insulating synthetic resin or the like, and on the right side of FIG. 3, there is a thick cylinder 7a that fits with the base 5a of the cylindrical body 5, and on the left side is a thin cylinder 7b. There is a taper portion 7c that connects the middle portion with the main body portion 6b of the cylindrical terminal 6 described above. Then, the waterproof plug 8 is fitted through the left end opening 7d, the tubular elastic body 5 is fitted inside from the right end, and then the rear holder 9 is fitted outside.

As shown in FIG. 3, the waterproof plug 8 is made of an elastic material such as silicon rubber in the shape of a disk or a column, and seals the left end opening 7d of the thin cylinder 7b in a watertight manner. Is. The waterproof plug 8 is provided with a plurality of holes 8a for watertightly inserting the internal wire 2 and the external electric wire 10.

As shown in FIG. 4, the rear holder 9 has a shape in which a bottom portion 9b formed at one end of a short cylinder 9a is provided with a hole 9c through which the shield wire 1 is inserted. And as shown in FIG.
The cylindrical portion 9a is fitted to the right end of the tubular case 7, and the locking portion 9d engages with a locking projection 7e (FIG. 3) formed on the outside of the cylindrical portion 7a, thereby making The elastic body 5 is fixed. At this time, the rib 5d formed on the tubular elastic body 5 fits in a watertight manner.

Next, the assembly of the connector for the shield stopper terminal portion of the present invention will be described with reference to FIG. The following assembling order is an example, and the order is not limited to this order.

First, the shield wire 1 is inserted into the base portion 5a of the tubular body 5. Next, the outer insulating layer 4 at the end of the shielded wire 1 is peeled off with an appropriate length to expose the braided wire 3. Next, this braided wire 3
Is folded back and overlapped on the tapered conductive tube 5b of the tubular body 5. Next, the tapered body portion 6b of the tubular terminal 6 is connected to the conductive tube 5b.
Overlay on the braided wire 3 that is overlaid. Thereafter, the mating terminal 11 attached to the tip of the external electric wire 10 is fitted into the tab-shaped connecting portion 6a provided on the conductive tubular terminal 6, whereby the braided wire 3 is inserted through the tubular terminal 6. Connected to the external electric wire 10. Next, the cylindrical case 7 is fitted from above, and the rear holder 9 is fitted into the thick cylindrical portion 7a of the cylindrical case 7. by this,
The tapered portion 7c of the tubular case 7 overlaps the tapered main body portion 6b formed on the conductive tubular terminal 6, and the tubular terminal 6 is brought into pressure contact with the conductive tube 5b. At the same time that the connection with is secured, the tubular terminal 6 is locked in the tubular case 7. On the other hand, the two extension wires 2 and the external electric wire 10 are projected to the outside from the left end opening 7d of the thin cylindrical portion 7b of the tubular case 7, and the waterproof plug 8 in which the external electric wire 10 and the internal wire 2 have been inserted in advance is a thin cylinder. Fits on the left end of the portion 7b.

The connector A is assembled as described above, and then the waterproof plug 8 is attached.
A terminal metal fitting (not shown) is attached to the tips of the inner wire 2 and the outer electric wire 10 protruding from the inner wire 2 and accommodated in another connector or the like to be connected to the mating electric wire or the like.

FIG. 5 shows an embodiment in which the rear holder 9 is not used. The thick cylindrical portion 7a of the tubular case 7 is provided with a locking projection 7f projecting toward the inside of the cylinder at the end portion thereof, and the locking projection 7f directly locks the tubular body 5. With this configuration, the number of parts is reduced, and the cost can be reduced accordingly. Also, since the rear holder 9 having a large diameter is eliminated,
The outer diameter of the connector A can be reduced.

FIG. 6 shows another example in which the braided wire 3 is pressure-welded without using a tapered surface. In this example,
The conductive cylinder 5b 'formed on the cylindrical body 5 is a straight cylinder without a taper, and the main body portion 6b' of the mating cylindrical terminal 6 is also a straight cylinder. On the other hand, the cylindrical case 7
However, as shown in FIG. 7, there is no tapered surface 7c. Then, the conductive tube 5b 'is formed by the projection 5e provided on the conductive tube 5b'.
The b'and the main body portion 6b 'of the tubular terminal 6 are press-fitted with the braided wire 3 interposed therebetween. In addition, the tubular case 7
A locking hole 7g is formed in an inner wall of the inner cylindrical terminal 6 that is housed therein, and a lance 6d projecting from the main body portion 6b 'engages with the locking hole 7g to fit the cylindrical terminal 6 into the cylindrical case 7 It is locked inside. In addition,
The slit shown in FIG. 2 (a) is formed in the main body portion 6b 'of the cylindrical terminal 6.
A slit similar to that of 5c is provided to elastically press the conductive tube 5b 'through the braided wire 3 due to the elasticity of the main body 6b', and a gap is formed between the inner diameter of the tubular case 7 and the tubular terminal 6. It may be configured. With the above configuration, it is not necessary to form a tapered surface, and thus it is easy to form each part.

FIGS. 8 and 9 show still another embodiment. The shielded wire terminal connector shown in these figures has a tubular body 11, a conductive tubular terminal 12, a tubular case 13 and a watertight seal for these. It consists of packings 14 and 15 for engagement and waterproof plugs 16 and 17.

The tubular body 11 corresponds to the tubular body 5 in the embodiment of FIG. 1, and the shield wire 1 penetrates the entire body thereof, and is formed in the gear-shaped outer wall on the shield wire insertion side of the drawing. There is a waterproof space 11a for accommodating the packing, and the collar part 11b,
The cylindrical portion 11c, the screw portion 11d, and the taper surface 11e are successively arranged.

The tubular terminal 12 is substantially the same as the tubular terminal 6 in the embodiment shown in FIG. 1, is made of a conductive member such as a metal thin plate, and has an annular main body portion 12a having the same taper as the tapered surface 11e of the tubular body 11. And a connecting portion 12b for connecting to an electric wire extended from a part of this annular shape. The main body portion 12a has a slit 12c so that it can cope with a difference in diameter of the braided wire 3 to be pressed. Then, the external electric wire 10 is crimp-connected to the connecting portion 12b.

The cylindrical case 13 is the cylindrical case 7 in the embodiment of FIG.
Corresponding to the inside of the cylindrical body 11 and the cylindrical terminal 12
Has a large diameter portion 13a in the lower left of the figure, followed by a middle portion 13b, a tapered portion 13c and a small diameter portion 13d are formed in sequence, further having an open end in the large diameter portion 13a. The terminal accommodating portion 13e is formed along one side of the cylindrical case 13, projects further to the upper right than the small diameter portion 13d, and its tip is tapered. A female screw 13f is engraved inside the intermediate portion 13b, and the screw portion 11 formed on the cylindrical body 11 is formed.
Screw with d.

The packing 14 is a waterproof space 11a between the shield wire 1 and the tubular body 11.
And the packing 15 is a cylindrical portion 11 of the tubular body 11.
It is fitted between c and the large diameter portion 13a of the cylindrical case. Also,
The waterproof plug 16 inserts the external electric wire 10 in a watertight manner with the terminal accommodating portion 13e, and the waterproof plug 17 has a hole 17a in which the extension 2 of the shielded wire 1 is inserted.
Is watertightly inserted and is housed in the small diameter portion 13d of the cylindrical case 13. Each of these packing 14,15 and waterproof plug 16,
With 17, the parts from the shielded wire 1 to the tubular case 13 are watertightly closed.

Next, an example of the order of assembling the connector will be described with reference to FIGS. 8 and 9.

First, the shielded wire 1 is inserted into the packing 14 and the tubular body 11 with the insulating coating 4 peeled off at the end thereof and the inner wire 2 and the braided wire 3 are exposed. After the end portion of the shielded wire 1 penetrates through the tubular body 11, the portion of the braided wire 3 is expanded outward and covered on the tapered surface 11e, and the packing 15 is fitted in the position of the cylindrical portion 11c. Further, the external electric wire 10 is crimp-connected to the connecting portion 12b of the tubular terminal 12 in advance, and the waterproof plug 16 is attached to the external electric wire 10. The main body portion 12a of the tubular terminal 12 is attached to the tubular body 11 so as to cover the taper portion 11e covered with the braided wire 3,
The waterproof plug 17 is inserted from the tip of the extension 2 so that the tubular terminal 12 is temporarily fixed to the tubular body 11.

Next, the external electric wire 10 is inserted into the terminal accommodating portion 13e, and at the same time, the extension 2 penetrating the tubular body 11 and the waterproof plug 17 is inserted into the tubular case 13 so that the respective tips are projected to the outside. Further, while rotating the tubular body 11, the tubular body 13 is inserted into the tubular case 13, and the male screw portion 11d is screwed into the female screw portion 13f, and the body portion of the tubular terminal 12 is
The braided wire 3 is sandwiched between the 12a and the tapered surface 11e and pressed against each other. The small diameter portion 13d of the tubular case 13 is closed by a waterproof plug 17, and the tip of the terminal accommodating portion 13e is closed by a packing 16. At this time, the external electric wire 10 and the extension wire 2 are pulled from the terminal accommodating chamber side (upper right side in the figure) of the tubular case 13 so that there is no slack. As a result, as shown in FIG. 9, the braided wire 3 and the external electric wire 10 are electrically connected to each other through the tubular terminal 12 and the connecting portion 12a. Finally, put the packing 14 in the waterproof space at the rear end of the tubular body 11.
Push into 11a to finish the assembly. Shielded wire 1
Although the terminal portion is connected to the terminal connector in a watertight state, the tubular body 11 and the tubular case 13 can be firmly joined by screwing.

After that, the extension 2 and the external electric wire 10 are connected to another connector or the like, and are connected to the mating electric wire.

By the way, in each of the above-mentioned embodiments, it is important that the braided wire 3 exposed at the end of the shielded wire 1 is folded back in the opposite direction as shown in FIG. 10 (a). However, this work is surprisingly difficult and tends to form a dumpling as shown in FIG. 10 (b). If it becomes a dumpling, the tubular body 5 and the tubular terminal 6 cannot be fitted well, and the assembly of the connector becomes very difficult.
The shorter the braided wire 3 is, the better it can be folded back, but if so, the reliability of electrical conduction cannot be maintained. Further, in the above-described embodiment, the number of parts is relatively large.

The embodiment shown in FIG. 11 and FIG. 12 is made by paying attention to such a point.

The shielded wire terminal connector shown in these figures includes a tubular body 18, a conductive tubular terminal 19, and a resin layer 20 molded so as to cover these connecting portions. That is, as compared with the above-mentioned respective embodiments, the cylindrical case, the waterproof plug, the packing, etc. are not required, and the number of parts can be greatly reduced.

Explaining in detail below, the tubular body 18 corresponds to the tubular body 5 in FIG. 1 and has a configuration in which a shield wire can penetrate,
A tubular portion 18a without a taper and an elliptical collar portion 18b are integrally formed, and a male screw 18c is engraved at the tip of the tubular portion 18a. The collar portion 18b is not essential and can be omitted. The material of the tubular portion 18a and the collar portion 18b may be either conductive or insulative, but since the collar portion 18b is exposed to the outside, it is electrically insulated from the tubular portion 18a. Further, as the material of the collar portion 18b, a material having heat resistance because the resin layer 20 is molded is required, and moreover, a material capable of ensuring a sealing property with the shield wire is required.

The tubular terminal 19 corresponds to the tubular terminal 6 of FIG.
Although it is shown in a half-divided state so that the inside can be seen in the drawing, a busbar-shaped connecting portion 19a is integrally formed of a cylindrical conductive metal, and the cylindrical portion 18a of the tubular body 18 It has a slit 19b for allowing screwing to have flexibility, and a female screw 19c for screwing with a male screw 18c.

Next, an example of the assembling order will be described.

First, the tubular body 18 is fitted to the end of the shielded wire 1, the outer insulating layer 4 at the end of the shielded wire 1 is peeled off, and the inner wire 2 and the braided wire 3 are removed.
Expose. The tubular body 18 is moved to the vicinity of the end of the outer insulating layer 4, the braided wire 3 is brought into a dumpling shape without being folded back, the tubular terminal 19 is inserted from the tip of the inner wire 2, and the female screw 19c and the tubular body 18 are inserted. Screw the male screw 18c. At this time, the braided wire 3
Is strongly sandwiched between the tubular body 18 and the tubular terminal 19, and an electrically reliable connection can be established with the conductive tubular terminal 19. Then, the terminal 11 of the external electric wire 10 is fitted into the connecting portion 19a of the tubular terminal 19.

If the connecting portion is a place where it is not affected by moisture, the assembling work is completed and the periphery of the connecting portion may be covered with tape or the like to the extent that electric shock is not generated.

However, in a place susceptible to moisture, covering with tape or the like is not sufficient, so after that, the connecting portion between the tubular body 18 and the tubular terminal 19 is surrounded by a mold or the like not shown, and molded by resin molding. Form layer 20 to ensure waterproofness.

According to this embodiment, since the braided wire 3 need not be folded back but simply put in a dumpling shape, the braided wire can be easily processed and the work efficiency is improved. At the same time, the number of parts can be reduced, so that the cost can be reduced. In addition, if the resin layer formed by molding covers the connecting portion, the waterproof property is improved.

In the above embodiment, the braided wire 3 does not have to be folded back, and the folding back is not prohibited. Further, the coupling between the tubular body 18 and the tubular terminal 19 is only required to ensure a stable electrical coupling, and is therefore not limited to the coupling by screws.

[Effect of device]

As described above, according to the present invention, there is no fear of damaging the braided wire, and the work of winding the tape is also unnecessary, so that the connector can be easily attached to the end portion of the shielded wire. Also, if it is made watertight by attaching a waterproof plug or forming a resin layer by molding, it can also be used as a waterproof connector, and in the case of a configuration in which the resin layer is formed by molding as described above, the work is facilitated. In addition, the number of parts can be reduced, and other special effects can be obtained.

[Brief description of drawings]

FIG. 1 is a partially cutaway perspective view of a shielded wire terminal connector of the present invention, FIG. 2 is a view of a tubular elastic body, (a) is a perspective view, (b) is a longitudinal sectional view, and FIG. Is an exploded perspective view in which the tubular case of the electrically conductive tubular terminal and the waterproof plug are partially broken, FIG. 4 is a perspective view showing a state during assembly of the connector of the present invention, and FIG. 5 does not use a rear holder. FIG. 6 is a longitudinal sectional view of the embodiment, FIG. 6 is an exploded perspective view of a cylindrical elastic body and a conductive tubular terminal of the embodiment that does not use a tapered surface, and FIG. 7 is a cross-sectional view of a main part of the embodiment that does not use a tapered surface. FIG. 8 is an exploded perspective view showing an embodiment in which a tubular body and a tubular case are screwed together, FIG. 9 is a longitudinal sectional view showing the assembled embodiment of FIG. 8 and FIG. In the figure showing the processing state of the end part of (a), it is a state in which it is folded back in the opposite direction cleanly, and (b) is in the shape of a dumpling without being folded back in the opposite side. Fig. 11 is an exploded perspective view of an embodiment of the present invention in which the number of parts is reduced, and Fig. 12 (a) is a partially broken perspective view showing a state in which a resin layer is formed on the connector of Fig. 11. The figure, (b) is a left side view of (a), and (a) to (e) of FIG. 13 are diagrams showing a process of processing a terminal portion of a conventional shielded wire. 1 ... Shielded wire, 2 ... Inner wire, 3 ... Braided wire, 4 ... External insulating layer, 5,11,18 ... Cylindrical body, 6,12,19 ... Cylindrical terminal, 6a, 12b, 19a
… Connecting part, 7,13… Cylindrical case, 8,16,17… Waterproof plug, 14,15
… Packing, 20… resin layer.

Claims (4)

[Scope of utility model registration request] 1. A tubular body which is used for an end portion of a shielded wire in which an insulating coated inner wire is covered with a conductive braided wire and the braided wire is covered with an external insulating layer, and which is fitted to the external insulating layer. And a tubular terminal having a connecting portion for connecting an external electric wire together with a main body portion that presses the braided wire folded back at the end of the external insulating layer between the tubular body and the tubular body, A shielded wire terminal connector comprising a tubular case for accommodating and locking a tubular body and a tubular terminal. 2. The shielded wire terminal connector according to claim 1, wherein the shielded wire and the cylindrical case are watertightly engaged with each other by an elastic member such as packing. 3. A tubular body which is used for an end portion of a shielded wire in which an insulation-coated inner wire is covered with a conductive braided wire and the braided wire is covered with an outer insulating layer, and which is fitted to the outer insulating layer. And a tubular terminal having a connecting portion for connecting to an external electric wire together with a main body portion that presses the braided wire exposed at the end of the external insulating layer between the tubular body and the tubular body. Characteristic shielded wire terminal connector. 4. The shield according to claim 3, wherein a connecting portion between the cylindrical body mounted on the end of the shielded wire and the cylindrical terminal is covered with a molded waterproof resin layer. Wire terminal connector.