JP3355124B2 - Terminal connection structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a terminal connection structure for an electric wire requiring waterproofness, and more particularly to a structure in which noise generated in a connector is grounded from a braided shield of a shielded electric wire connected to a connector housing. The present invention relates to a terminal connection structure for a shielded electric wire configured so that a shield function can be peeled off.

[0002]

2. Description of the Related Art Conventionally, there are various connection structures for electric wires, and among them, there is a connection structure for shielded electric wires. The connection structure of this shielded electric wire has a structure as shown in FIG. 8, for example. 8, the shield connector 40 includes a connector housing 41 made of synthetic resin, a metal shield 42 fitted on an inner peripheral portion of the connector housing 41, and terminals of the connector housing 41. The press contact terminal 4 in the housing 43
4 and a metal shield 42 connected to a braided shield 47 of the shielded wire 46.
8 is formed. When the press contact terminal 44 to which the sheath wire 45 of the shielded wire 46 is connected is connected to the connector housing 41, noise generated in the connector housing 41 is prevented from being magnetized by the metal shield 42 and the drain wire from the braided shield 47 to the inside. 49, which is grounded to the outside.
No. 127083).

At the place where this shielded wire is used,
In some cases, high hermeticity such as waterproofness of the connection portion is required. As one example, for example, as shown in FIG. 9, in order to prevent infiltration of the shielded electric wire 52 from the braided shield 50, a rubber member 55 extends from the base of the shielded electric wire 52 to the tip of the braided wire 51 with terminals. Is integrally molded (see Japanese Unexamined Patent Publication No.
No. 182071).

However, in the waterproof structure shown in FIG. 9, since the terminals 56 and the rubber members 55 are connected by molding, not only the manufacturing process is troublesome, but also the productivity is extremely poor. Further, the braided wire 51 is hardly bent because the rubber member 55 enlarges, and the terminal 5
There were various problems such as poor workability such as insertion / removal of No. 6.

[0005]

In the connection structure of the conventional shield connector 40 shown in FIG. 8, the shielded electric wire 46 is fixed to the metal shield 42 by a caulking fixing portion 48 formed integrally with the metal shield 42.
Since it is fixed by caulking, no waterproof means is applied to the connection portion of the shielded electric wire 46 to the connector housing 41, and waterproofing at this connection portion cannot be expected.

Further, in order to ground the noise generated in the connector housing 41 to the outside and to exert a shielding function, a metal shield 42 is provided in the connector housing 41.
Therefore, the application of the molding as shown in FIG. 9 takes time and effort to manufacture, and especially in a configuration having a large number of connection terminals, the application of the molding is extremely difficult. .

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and has a good electrical continuity at a connection portion of a shielded electric wire to a connector housing to exhibit a sufficient shielding function. Another object of the present invention is to provide an excellent terminal connection structure.

[0008]

Means for Solving the Problems The object of the present invention, the end
In a terminal connection structure provided in the vicinity of the connection portion of the shielded wire to which the terminal is connected and having airtight means for maintaining the waterproofness of the connection portion and contact means capable of conducting with the braided shield of the shielded wire . In the airtight means, a locking means harder than the means is integrally formed, and the airtight means and the contact means are integrated by fitting the contact means and the locking means. This can be achieved by the characteristic terminal connection structure.

Further, in the terminal connection structure according to the present invention, the contact means is annular, one end of which is formed as a conductive part with the electric wire, and the other end is formed as a connecting part with the locking means. The locking means is provided with a locking hole, and the locking means is provided with a locking projection. The locking means and the contacting means are pushed into the axial direction of both means, so that It is possible to adopt a form in which the locking holes 8 are fitted and fixed.

Further, in the terminal connection structure according to the present invention, the locking projection is configured to be fitted into the locking hole from the inside of the connecting portion. The end face may have a form in which a tapered surface having an insertion guiding function is provided. Still further, in the terminal connection structure according to the present invention, the conductive portion may be fixed via a shield pipe fitted over the conductive portion.

(Operation) According to the terminal connection structure of the present invention, the terminals are connected.
Provided in the vicinity of the connection portion of the shielded wire, the
Airtight means for maintaining the waterproofness of the connection portion, and the shield
In a terminal connection structure having a braided shield of an electric wire and a contact means capable of conducting , the airtight means is integrally formed with a locking means harder than the means, and the airtight means and the contact means are provided as By being integrated by fitting the contact means and the locking means, it becomes easy to fix the airtight means to a desired member. The airtight means and the contact means made of metal or the like are configured so that the contact means made of a metal member or the like and the locking means can be integrated by fitting and assembling. Thus, a soft member such as a rubber material can be easily fixed.

In the terminal connection structure according to the present invention, the contact means is formed in an annular shape, one end of which is a conductive part with the electric wire, and the other end of which is a connecting part with the locking means. The locking means is provided with a locking projection, and the locking means and the contacting means are fitted and fixed by pushing the locking means and the contact means in the axial direction of both means. According to such a configuration, since the locking means can be configured to have a smaller diameter than the contact means, the airtight means can be fixed without obstructing the contact function of the contact means with the outside.

Further, in the terminal connection structure according to the present invention, when the locking projection is configured to fit into the locking hole from the inside of the connecting portion, the end surface on the distal end side when the locking projection is fitted is: The engagement between the engagement protrusion and the engagement hole is facilitated by being formed on the tapered surface having the engagement guiding function.

In the terminal connection structure according to the present invention, when the conductive portion is fixed via a shield pipe fitted over the conductive portion, the connection of the conductive portion is ensured and the connecting means is provided. Can be securely fixed.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of a terminal connection structure according to the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a schematic sectional view of a terminal connection structure according to the present invention. FIG. 2 is an enlarged sectional view of a main part of FIG. FIG.
FIG. 2 is an exploded perspective view of a main part of the embodiment shown in FIG. FIG. 4 is a schematic diagram of the terminal connection structure shown in FIG. FIG. 5 is a schematic view of the terminal connection structure shown in FIG. FIG. 6 is a schematic view of a first stage of another mounting operation in the terminal connection structure shown in FIG. FIG. 7 is a schematic view of the terminal connection structure shown in FIG. 1 at a later stage of another mounting operation.

As shown in FIGS. 1 to 3, the terminal connection structure according to the present embodiment is provided near the connection portion of the electric wire 1 where the terminal 20 is connected to the core wire 4 and exhibits a waterproof property. The rubber plug 10 is an airtight means for maintaining airtightness by contacting the terminal 20 with, for example, a connector housing to which the terminal 20 is connected. And a shield contact 15 which is a possible contact means.

The rubber wire 10 is made of a highly elastic member such as a rubber material in the form of a bellows, for example, which is in contact with another member such as a connector housing to easily maintain the airtightness of the area where the terminals 20 are arranged. It is configured. On the other hand, a holder 11 which is a locking means made of, for example, a synthetic resin material, which is harder than the rubber material, is integrally formed with the rubber stopper 10 described above.
Since the holder 11 has a high elastic force, the rubber stopper 10 that is difficult to fix to another member is easily fixed to a desired member.

The rubber stopper 10 and the shield contact 15 made of metal or the like are connected via a holder 11.
As shown in an exploded view of FIG. 3, this can be integrated by fitting and assembling such that the holder 11 is pushed into the shield contact 15 made of a metal member or the like. In this way, a very flexible member such as the rubber stopper 10 can be easily fixed to the hard shield contact 15 by a very simple operation of fitting.

In this embodiment, as shown in FIG. 3, the shield contact 15 is formed into a ring-shaped conductive part 16 having a small diameter at one end and in contact with the braided shield 2 of the electric wire 1. The other end side opposite to the conducting portion 16 is formed as a connecting portion 17 that engages with the holder 11. The connecting portion 17 is provided with, for example, two locking holes 18, while the holder 11 has locking protrusions 1 corresponding to the locking holes 18.
2 are provided. When the holder 11 and the shield contact 15 are pushed in the axial direction of both means, the locking projection 12 and the locking hole 18 are fitted and fixed.

In the present embodiment, the locking projection 12 is configured to fit into the locking hole 18 from the inside of the connecting portion 17. The end surface on the distal end side of the locking projection 12 when the fitting is fitted is formed as a tapered surface 14 having an inducing function when the two members are fitted. Therefore, when the holder 11 and the shield contact 15 are fitted, it is easy to push in, and the end face of the locking projection 12 on the side opposite to the tapered surface 14 is steep, so that the projection 12 is engaged. After fitting into the stop hole 18, it is hard to fall off.

Further, in the terminal connection structure of the present embodiment, as shown in FIG. 1, in a state where the conductive portion 16 is in contact with the braided shield 2, a shield pipe 19 fitted from above the conductive portion 16 is formed. It is fixed firmly through.

Referring to FIGS. 4 and 5, a method of mounting the terminal connection structure according to the present embodiment will be described. First, a holder 11 is attached to the end of the shielded wire 1.
Then, the rubber stopper 10 and the shield contact 15 integrated with each other are mounted. After that, the braided shield part 2 is exposed, and the shield contact 15
The conductive portion 16 is positioned, and the shield pipe 19 is put on and crimped for connection (the state shown in FIG. 4). Thereafter, the holder 11 is inserted into the connecting portion 17, and the locking projection 12 is fitted into the locking hole 18. At this time, by seeing the locking projections 12 from the locking holes 18, it can be confirmed that the fitting is performed securely. Thereafter, subsequently, as shown in FIG.

Hereinafter, another mounting method in the terminal connection structure of the present embodiment will be described with reference to FIGS. First, at the end of the shielded wire 1, a holder 1
A state in which the rubber plug 10 and the shield contact 15 integrated with 1 are assembled in advance (in the direction of arrow A) is mounted (state in FIG. 6). Then, the braided shield part (not shown)
Is exposed, the conductive portion 16 of the shield contact 15 is positioned on the exposed portion of the braided shield portion, the shield pipe 19 is covered and swaged, and the core wire 4 is exposed (see FIG. 7). Status). Thereafter, subsequently, the core wire 4 is inserted into the crimped portion 21 of the terminal 20 and crimped.

In the above embodiment, the holder is inserted into the connecting portion of the shield contact, and the locking projection is fitted into the locking hole. However, the connection structure according to the present invention has such a configuration. However, the present invention is not limited to this, and may be a form in which the shield contact fits in the holder, or may be formed on a member opposite to the projection and the hole. Is not limited to two.
In the above embodiment, the shielded electric wire has been described.
The terminal connection structure according to the present invention is not limited to a shielded electric wire, but can be appropriately applied to other electric wires.

[0025]

As described above, the terminal connection structure according to the present invention is provided with airtight means provided near the connection portion of the shielded wire to which the terminal is connected to maintain the waterproofness of the connection portion. in terminal connection structure having a braided shield and conductively contact means of the shield wire, the airtight means are integrally molded rigid locking means than said means, said contact means and said airtight means Are integrated by fitting the contact means and the locking means, and the airtight means and the contact means are configured to be integrated by fitting the contact means and the locking means. Because of this, it is possible to easily fix a soft member such as rubber material with a very simple operation of fitting, and maintain airtightness near the terminal connection without performing molding process as in the past. Can be excellent in waterproofness etc. To have. Further, the terminal connection structure according to the present invention is excellent in assemblability because the airtight means can be fixed to the metal fitting near the terminal by fitting.

[Brief description of the drawings]

FIG. 1 is a schematic sectional view of a terminal connection structure according to the present invention.

FIG. 2 is an enlarged sectional view of a main part of FIG.

FIG. 3 is an exploded perspective view of a main part of the embodiment shown in FIG. 1;

FIG. 4 is a schematic view of a terminal connection structure shown in FIG. 1 in a first stage of an attaching operation.

FIG. 5 is a schematic view of the terminal connection structure shown in FIG. 1 at a later stage of an attaching operation.

FIG. 6 is a schematic diagram of a first stage of another mounting operation in the terminal connection structure shown in FIG. 1;

FIG. 7 is a schematic view of a subsequent stage of another mounting operation in the terminal connection structure shown in FIG. 1;

FIG. 8 is a perspective view showing an example of a conventional terminal connection structure.

FIG. 9 is a sectional view showing another example of a conventional terminal connection structure.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Shield electric wire 2 Braided shield part 3 Sheath wire 4 Core wire 10 Rubber stopper (Airtight means) 11 Holder (Locking means) 12 Locking projection 14 Tapered surface 15 Shield contact (Contact means) 16 Contact part 17 Connecting part 18 Lock Hole 19 Shield pipe 20 Terminal

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) H02G 15/00 H02G 15/02

Claims (4)

(57) [Claims] An airtight means provided in the vicinity of the connection portion of the shielded electric wire to which the terminal is connected to maintain waterproofness of the connection portion; and a braided shield of the shielded electric wire. In a terminal connection structure having a conductive contact means , the airtight means is formed integrally with a locking means harder than the means, and the airtight means and the contact means are connected to the contact means. A terminal connection structure which is integrated by fitting with a locking means. 2. The contact means has an annular shape, one end of which is formed as a conductive part with the electric wire, and the other end is formed as a connecting part with the locking means, and the connecting part is provided with a locking hole, The locking means is provided with a locking projection, and the locking means and the contact means are pushed in the axial direction of both means,
The terminal connection structure according to claim 1, wherein the locking projection and the locking hole are configured to be fitted and fixed. 3. The locking projection is configured to fit into the locking hole from the inside of the connecting portion, and a taper having a fitting-inducing function is provided on an end surface on a distal end side when the locking projection is fitted. The terminal connection structure according to claim 2, wherein a surface is provided. 4. The terminal connection structure according to claim 2, wherein the conductive portion is fixed via a shield pipe fitted over the conductive portion.