JP2002083647A - Cable connector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cable connector which is superior in pressure resistance. SOLUTION: In the cable connector, where a front insert 120 and a rear insert 130 for retaining a contact 140 are mounted on one side in a cylindrical sheath shell 110, a cable 200 is mounted on the other side in the cylinder of the sheath shell 110; and a cable core wire 210 of the cable 200 is connected with the contact 140; and this is the cable connector where a coating layer 400 of an insulating material is installed at a joint face side between the front insert 120 and the rear insert 130, and as a result of this, a superior pressure resistance is obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cable connector having particularly excellent pressure resistance.

[0002]

2. Description of the Related Art In the case of cables used for various industrial machines (for example, robot devices) and facilities, high waterproofness is required depending on the use environment, and high pressure resistance (depending on the supplied power). Voltage resistance) is also required.
Of course, a cable connector used for such a cable also requires the same excellent waterproofness, drip-proofness, pressure resistance and the like. On the other hand, in recent years, even in the above-described industrial machines and equipment, the size of the devices and equipment has been reduced, and accordingly, the size of the cable connector has also been required to be reduced.

As a cable connector meeting such a demand, a front insert made of a cylindrical insulating resin block is provided on one (front end) side of a cylindrical metal outer shell (case body) in the cylinder. A rear insert consisting of a thin disk-shaped insulating resin block attached to the back side of the outer shell is attached, and a metal contact is held between the two inserts while the other inside the cylinder of the outer shell. A connector has been proposed in which a cable is mounted on the (rear end) side, a cable core wire of the cable is connected to a contact, and further, an empty space in the outer shell cylinder is filled with a filler made of an insulating material. .

[0004] The structure of filling the filler eliminates unnecessary dew condensation space from the inside of the outer shell, so that a good drip-proof property can be obtained, and intrusion of water from the outside can be effectively prevented. Waterproofness is also obtained. For example, with a connector having the same structure, an outer diameter (thickness) of 3 m is obtained by a front insert and a rear insert having an outer diameter of about 25 mm.
When a plurality of contacts of about m are arranged at equal intervals, a withstand voltage of about 7000 V is obtained between adjacent contacts, and a withstand voltage of about 10,000 V is obtained between the contact and the outer shell. Have been obtained.

[0005]

In order to further improve the pressure resistance of the connector having the same structure, the present inventors have studied in more detail a dielectric breakdown connector in an impulse withstand voltage test. Found that it occurred mainly on the joint surface (butting surface) side of the front insert and the rear insert. That is, when the front insert and the rear insert were simply butted, a minute gap was formed on the mating surface, and this was found to be a cause of dielectric breakdown.

The present invention has been made from such a viewpoint. More basically, the gap between the joining surfaces of the front insert and the rear insert is closed with an insulating material to provide a more excellent withstand voltage. It is an object of the present invention to provide a connector for a cable which is designed to obtain a high performance.

[0007]

According to a first aspect of the present invention, a front insert and a rear insert for holding a contact are mounted on one side of a cylindrical exterior shell inside a cylinder, and the exterior shell is provided with a front insert and a rear insert. A cable is mounted on the other side in the cylinder, and a cable connector for connecting a cable core of the cable to the contact is provided with a coating layer of an insulating material on a joint surface side between the front insert and the rear insert. Characteristic cable connector.

According to a second aspect of the present invention, there is provided the cable connector according to the first aspect, wherein the insulating material of the coating layer is silicone rubber or silicone resin.

According to a third aspect of the present invention, there is provided the cable connector according to the first or second aspect, wherein an empty space in the outer shell tube is filled with a filler of an insulating material.

[0010]

FIG. 1 shows an embodiment of a cable connector according to the present invention, and FIG. 2 shows a joint surface between a front insert and a rear insert. In the figure, 100 is a connector main body, 110 is a cylindrical outer shell made of metal (case main body), and 120 is a cylindrical insulating resin (e.g., a screw) mounted on one (front end) side of the outer shell inside the cylinder by screwing or the like. A front insert made of a block body made of an electrically insulating resin, the same applies hereinafter), a rear insert 130 made of a thin disk-shaped insulating resin made of a block body attached to the back side, and 140 made of both inserts 120, A metal contact that is held by being sandwiched by 130, a clamp 150 for a cable incorporated into the other (rear end) side of the outer shell 110 in the cylinder, and a clamp 200 that is fixed by the clamp 150 The cable 300 inserted into the cylinder of the outer shell 110 was filled in the empty space portion of the outer shell 110 in the cylinder. A filler made of edge material. In addition,
160 is a cylindrical coupling attached to the outer periphery of the outer shell 110 and used for fixing to a mating connector, 1
Reference numeral 70 denotes a resin cap that covers the outwardly projecting portion of the front insert 120 when not in use.

Although the contact 140 is not particularly limited, in the present embodiment, the tip is a cylindrical (pipe) contact, and the contact of the mating connector (the tip pin of the pin-type contact) is inserted therein. It has become. Conversely, the main contact 140 may be a pin type and the other side may be a pipe type.

The contact 140 is located inside the contact hole 121 of the front insert 120 (right side in FIG. 1).
The rear end is fitted into the contact hole 131 of the rear insert 130, and the reduced diameter step 141 is fitted in the contact hole 131. It is fixed in contact with the stepped portion 132. Further, on the side of the cable connecting portion 142 of the contact 140 protruding from the contact hole 131 of the rear insert 130, the core conductor 210 further extended from the cable core 210 extended from the cable 200 is provided.
Reference numeral 20 is connected by soldering or press fitting.

In the connector 100 having this configuration, in the present invention, as is apparent from FIG. 2, a coating layer 400 made of an insulating material is provided on the joining surface (butting surface) between the front insert 120 and the rear insert 130. . Specifically, an insulating material is applied to one or both of the joining surfaces, and then the two are abutted to form an application layer 400.

The insulating material of the coating layer 400 and the filler 300 is not particularly limited, but may be an insulating resin composition, rubber, or the like. Here, from the viewpoint of improving the pressure resistance, it is preferable that the insulating material on the filler 300 side flows into the outer peripheral portion of the coating layer 400 on the insulating material side and is integrated therewith. In this case, it is desirable that both insulating materials be the same or the same type. That is, when the same or the same kind of resin composition or rubber is used, good adhesion is obtained, and stronger integration is obtained. For example,
Specific materials include silicone rubber and silicone resin having excellent insulating properties.

In any case, the formation of the coating layer 400 increases the creepage distance between the adjacent contacts 140. That is, when the coating layer 400 is not provided, the creepage distance between the adjacent contacts 140, 140 is determined by the front insert 120 and the rear insert 1
A path consisting of a gap between the bonding surface with the substrate 30 is conceivable, and this is short, whereas when the coating layer 400 is provided,
As the creepage distance, the contact 1
The path becomes longer between the cable connection portions 142 and 142 of the cable 40 and 140.

The contact 140 and the outer shell 11
The creepage distance between zeros also increases. That is, when there is no coating layer 400, the outermost contact 140 and the outer shell 1
The creepage distance between the front inserts 120 is
Is considered to be a path that opens to the inside of the outer shell 110 from the gap between the joining surface of the outer shell 110 and the rear insert 130. In contrast, when the path is short, when the coating layer 400 is provided, the creepage distance is substantially In addition, since the path becomes a path inside the cable connecting portion 142 of the contact 140 and the exterior shell 110, the length becomes longer.

As described above, a connector having a structure in which the front insert and the rear insert are simply butted together (a contact having an outer diameter (thickness) of about 3 mm is formed by the front insert and the rear insert having an outer diameter of about 25 mm). In the impulse withstand voltage test, the withstand voltage between adjacent contacts was about 7000 V, and the withstand voltage between the contact and the outer shell was about 10,000 V. Front insert 120 and rear insert 130 with the same structure
In the connector of the present invention in which the coating layer 400 of the insulating material is provided on the joint surface with the
The voltage was about 0 V, and the withstand voltage between the contact and the exterior shell was about 12000 V.

In the above embodiment, as a preferred embodiment, the filler 3
In the case of the present invention, it is applicable to a case where the filler 300 is not filled.
That is, even if the filler 300 is not filled, the coating layer 400
This is because at least the function of extending the creepage distance at the time of dielectric breakdown can be obtained.

[0019]

As is apparent from the above description, according to the cable connector of the present invention, the gap between the joining surfaces of the front insert and the rear insert is closed by the coating layer made of the insulating material. Excellent pressure resistance can be obtained. Of course, when an empty space in the outer shell is filled with a filler made of an insulating material, good waterproof and drip-proof properties can be obtained.

[Brief description of the drawings]

FIG. 1 is a partial longitudinal sectional side view showing an embodiment of a cable connector according to the present invention.

FIG. 2 is a partially enlarged longitudinal sectional side view of the cable connector of FIG. 1;

[Explanation of symbols]

 REFERENCE SIGNS LIST 100 connector body 110 exterior shell 120 front insert 130 rear insert 140 contact 200 cable 300 filler 400 applied layer

 ──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Takashi Kanda 2-11-20 Nishigotanda, Shinagawa-ku, Tokyo Inside Daiichi Denshi Kogyo Co., Ltd. (72) Kenichi Tsunoda 2-11 Nishigotanda, Shinagawa-ku, Tokyo No. 20 F-term in Dai-ichi Denshi Kogyo Co., Ltd. (reference) 5E087 EE02 EE11 FF07 GG13 GG25 LL02 LL03 LL14 MM05 QQ03 RR12 RR18 RR34

Claims (3)

[Claims] A front insert and a rear insert for holding a contact are mounted on one side of a cylindrical exterior shell inside a cylinder, and a cable is mounted on the other side inside the cylinder of the exterior shell. A cable connector for connecting a cable core wire to the contact, wherein a coating layer of an insulating material is provided on a joint surface between the front insert and the rear insert. 2. The cable connector according to claim 1, wherein the insulating material of the coating layer is silicone rubber or silicone resin. 3. The cable connector according to claim 1, wherein a vacant space in the outer shell cylinder is filled with a filler of an insulating material.