JP2527695Y2 - Cable connection device - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cable connecting device using a connector having a waterproof function.

[0002]

2. Description of the Related Art Conventionally, as this kind of apparatus, for example, FIG.
Are known. The round connector 1 includes a connector body 2 to which a cable M is connected, an annular fixture 3, a cylindrical case 4, and a cylindrical seal cap 5. As shown in FIG. 4, a fixture 3 is rotatably fitted to the front end 2 a of the connector main body 2, and a contact 15 is accommodated in a hollow portion 14. A socket 15a is formed at the front end of the contact 15,
The rear end portion 15b projects outside from the rear end surface of the main body 2 as a connection terminal, and is electrically connected to the core wire Ma of the cable M. A C-shaped spring 17 and an O-ring 19 are fitted in annular grooves 16 and 18 formed on the outer peripheral surface of the connector main body 2, respectively. The case 4 is provided with an insertion hole 22 through which the cable M is inserted.
An opening 23 having a rearward divergent shape is connected to the rear side of the insertion hole 22. A screw portion 24 to which a seal cap 5 described later is screwed is formed on the outer peripheral surface of the case 4.

When the rear end 2b of the connector body 2 is fitted into the insertion hole 22 of the case 4, the C-shaped spring 1
7 is engaged with the annular concave portion 21 of the case 4, and the case 4 is mounted on the connector main body 2 as shown in FIG. 5. At this time, the O-ring 19 expands due to its elastic force and is pressed against the inner peripheral surface of the case 4 to ensure liquid tightness between the connector body 2 and the case 4. On the inner peripheral surface of the fixture 3, a screw portion 20 to which one end of a mating connector (not shown) of the round connector 1 is screwed, and an O-ring 13 for ensuring liquid tightness are provided. Have been.

As shown in FIG. 6, a cylindrical elastic bush 30, a fixing ring 27 and a seal cap 5 are respectively provided.
Is inserted through the cable M, and the cable M is led out from the rear end opening 26 of the seal cap 5. A plurality of elastic claws 28 are formed integrally with the rear edge of the fixing ring 27 and extend at a position equidistantly arranged in the circumferential direction with the tip end side inclined toward the outer peripheral surface of the cable M. The elastic claw 28 can be easily manufactured by forming a slit 29 on the peripheral wall of the fixing ring 27. The elastic bush 30 is brought into contact with the tapered inner peripheral surface of the opening 23 of the case 4 and the fixing ring 27 is attached to the elastic bush 3.
When the screw portion 25 formed on the inner surface of the seal cap 5 is screwed to the screw portion 24 of the case 4 as shown in FIG.
The seal cap 5 is attached to the case 4 as shown in FIG.

At this time, the elastic claw 2 of the fixing ring 27 is
8 is pressed against the inner peripheral surface of the seal cap 5 and is displaced inward, and the tip of the elastic claw 28 bites into the outer peripheral surface of the cable M to press the cable M, thereby holding the cable M. Further, the elastic bush 30 is urged forward by the inward displacement of the elastic claw 28, and is pressed and deformed by the tapered inner peripheral surface of the opening 23, and is pressed against the inner peripheral surface of the fixing ring 27. Therefore, the elastic bush 30 comes into close contact with the inner peripheral surface of the opening 23 and the outer peripheral surface of the cable M due to the elastic reaction force. Thereby, the liquid tightness between the opening 23 and the cable M is ensured.

As described above, in the above configuration, when the seal cap 5 is screwed into the case 4, the elastic claws 28
As a result, the cable M is securely held by the round connector 1 and the elastic bush 30 ensures liquid tightness.
Also, by adjusting the degree to which the seal cap 5 is screwed into the case 4 and changing the amount of displacement of the elastic claw 28,
It is possible to cope with cables M having different diameters.

[0007]

However, according to the above construction, since the inner peripheral surface of the elastic claw 28 is formed smoothly and continuously with the inner peripheral surface of the fixing ring 27, the seal cap 5 is used as a case. At the time of screwing the elastic claw 4, the elastic bush 30 may penetrate to the tip of the elastic claw 28 as shown in FIG. In this case, since the inward displacement of the elastic claw 28 is hindered by the elastic bush 30, the force at which the tip of the elastic claw 28 bites into the cable M in a press-fit manner is weakened, and the holding force of the cable M is reduced. In addition, the elastic bush 30 is not sufficiently pressed against the opening 23, and the liquid tightness of the elastic bush 30 is reduced.

The present invention has been made to solve the above-mentioned problem, and has as its object to provide a cable connecting device having a simple structure, having a high cable holding force and a high liquid tightness.

[0009]

A cable connecting device according to the present invention is characterized in that a locking projection for locking one end surface of an elastic bush is formed on an inner surface of a base end of an elastic claw.

[0010]

According to the above construction, when the seal cap is screwed into the case, one end surface of the elastic bush is locked by the locking projection of the elastic claw, and the elastic bush enters the tip of the elastic claw. Never do. As a result, the elastic claws are sufficiently displaced inward to securely hold the cable M, and
The elastic bush is also sufficiently pressed and deformed to ensure liquid tightness.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a partially cutaway side view showing a main part of a cable connecting device according to the present invention. The same reference numerals are given to the same portions as those of the conventional cable connecting device, and detailed description thereof will be omitted. 8 differs from FIG. 8 in that the fixing ring 2
The locking projection 28a for locking one end surface of the elastic bush 30 is provided on the inner surface of the base end portion of the elastic claw 28 formed in FIG. As shown in FIG. 2, the locking projection 28 a is formed so as to traverse the inner surface of the base end of the elastic claw 28 in the circumferential direction.
8.

According to the above configuration, when the seal cap 5 of FIG. 1 is screwed into the case 4, one end surface of the elastic bush 30 is locked by the locking projection 28 a of the elastic claw 28, and Does not enter the tip of the elastic claw 28. As a result, the elastic claw 28 is sufficiently displaced inward by the inner peripheral surface of the case 4 to be screwed, and the tip of the elastic claw 28 bites into the outer peripheral surface of the cable M to press the cable M securely. Is held. Further, the elastic bush 30 is strongly urged forward by the inward displacement of the elastic claw 28 and is sufficiently pressed and deformed by the tapered inner peripheral surface of the opening 23, and at the same time, the inner peripheral Since the elastic bush 30 is pressed against the surface, high liquid tightness between the opening 23 and the cable M is ensured.

[0013]

As described above, according to the present invention, it is possible to provide a cable connecting device having a strong cable holding force and a high liquid tightness with a simple structure.

[Brief description of the drawings]

FIG. 1 is a partially cutaway side view showing a main part of a cable connection device according to the present invention.

FIG. 2 is a side view showing the fixing ring of the cable connection device with a part cut away.

FIG. 3 is a side view showing a conventional cable connection device.

FIG. 4 is an exploded side view showing the first half of the cable connection device with a part cut away.

FIG. 5 is a side view showing a front part of the cable connection device with a part cut away.

FIG. 6 is an exploded side view showing the rear half of the cable connection device with a part cut away.

FIG. 7 is a side view showing a rear part of the cable connection device with a part cut away.

FIG. 8 is a side view showing a main part of the cable connection device with a part cut away.

[Explanation of symbols]

 2 Connector body 4 Case 5 Seal cap 15b Connection terminal 23 Opening 24 Screw part 27 Fixing ring 28 Elastic claw 28a Locking projection 30 Elastic bush M Cable Ma Core wire

Claims (1)

(57) [Scope of request for utility model registration] 1. A connector body having a connection terminal to which a core wire of a cable is electrically connected protruding from a rear end face, and a cylinder mounted on a rear side of the connector body and through which a cable is inserted through a rear divergent opening. A case, a cylindrical elastic bush that is inserted into the cable and abuts on the tapered inner peripheral surface of the opening, and a threaded portion that is inserted into the cable and formed on the rear outer peripheral surface of the case. A cylindrical seal cap to be screwed, a fixing ring fitted inside the seal cap, and pressing the outer peripheral surface of the elastic bush with the tapered inner peripheral surface of the opening in a threaded state of the seal cap; A cable connecting device having a plurality of elastic claws formed on the rear edge of the fixing ring in a circumferential direction and pressing the outer peripheral surface of the cable in a biting manner with the seal cap screwed. A cable connecting device, wherein a locking projection for locking one end surface of the elastic bush is formed on an inner surface of a base end portion of the elastic claw.