JPH033997Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a connecting device between a connecting part at a terminal of an ignition device and a high voltage cord, and is designed to simplify the connection work and improve electrical sealing performance.

As shown in FIG. 8, the conventional structure of a connecting part is, for example, a terminal c to which a high voltage cord d is crimped and connected is fitted to a connecting part b of a spark plug a, and a terminal c is inserted into the connecting part between the terminal c and the connecting part b. An electrical seal is achieved by covering and tightening a rubber cap e, and an adhesive is applied to the contact area between the high voltage cord d and the cap e for sealing.

Cap e is made of rubber, and in addition to deteriorating its sealing performance due to thermal deterioration, in order to improve the sealing performance, it is necessary to reduce the inner diameter of the insertion part of the cap e to the connecting part b of the plug to increase the tightening rate. However, there were drawbacks such as poor attachment to the plug and poor workability, and furthermore, fatigue deterioration of the sealing portion increased, accelerating deterioration of sealing performance.

The present invention was made in order to eliminate the above-mentioned drawbacks, and it is an object of the present invention to provide a connecting tool that allows easy connection between the terminal terminal of an ignition device and a high-voltage cord, and has excellent heat resistance and electrical sealing properties. With the goal.

Hereinafter, the present invention will be explained based on the drawings. In FIGS. 1 to 4, 1 is a cylindrical connector main body constituting the sustaining device A, and 9 and 17 are attached to the front and rear of the main body 1, respectively. The tightening caps are made of polypropylene, polyamide resin,
Made from heat-resistant synthetic resins such as melamine-formalin resin and unsaturated polyester.

The connector main body 1 has an accommodating part 2 for the terminal c in the first half of the inside, an insertion hole 3 for the high voltage cord d connected to the terminal c in the second half, which is oriented in the axial direction, and a collar 5 at the free end on the outside front end. A split seal cover 4 is provided to be openable and closable via a hinge 6, and a threaded portion 7 having a smaller diameter than the main body 1 is formed at the rear end. Four guide grooves 8 extending in the axial direction are recessed at equal intervals on the outer circumference extending from the seal cover 4 to the first half of the connector main body 1.

The cap 9 has a cylindrical body 10 that is fitted onto the seal cover 4, and has a protrusion 11 protruding from the inner periphery of the cylinder 10, which corresponds to the guide groove 8, a flange 12 at the rear end of the outer periphery, and a pair of lock arms 13 on the outer periphery. Become. This arm 13 has a claw 14 at its tip that always projects toward the cylinder 10, an operating section 15 at its rear end, and is fixed to the cylinder 10 via a fulcrum member 16 in the middle.
On the other hand, a female thread is provided in the first half of the inner circumference of the cap 17 to be screwed into the threaded portion 7, and a cord insertion hole 19 is provided in the cover plate 18.

20 and 21 are cylindrical seal members housed inside the seal cover 4 and cap 17, respectively, and both are made of silicone rubber, oil-impregnated silicone rubber, fluorine rubber, etc., which are flexible and have excellent heat resistance and insulation properties. It will be done. And seal members 20 and 21
Through-holes 20a and 21a are formed in the holes 20a and 21a, respectively, to fit tightly into the connecting portion of the plug and the high-voltage cord.

Next, the connection between the plug and the high voltage cord using the above connector will be explained.

First, as shown in FIG. 1, the high voltage cord d is inserted through the cord insertion hole 3 of the connector main body 1, the terminal c is fitted into the housing part 2, and the high voltage cord d extending through the cord insertion hole 3 is inserted. The seal member 21 is inserted externally, and the cap 17 is screwed onto the threaded portion 7 of the main body 1. As a result, the sealing member 21 is tightened and compressed by the cap 17 and comes into close contact with the high voltage cord d.
The high voltage cord d is sealed from the outside.

On the other hand, the cap 9 has a protrusion 11 that is connected to the guide groove 8.
In the fitted state, slide the connector body 1 side to the non-tightened position in advance, spread the divided seal cover 4 sufficiently via the hinge 6, load the seal member 20, and close the cover. Close 4. In this state, the sealing member 20 is fitted to the outer periphery of the connecting part of the plug of the ignition device, the cap 9 is pressed in the direction of the arrow B, and the claw 1 as the locking part of the lock arm 13 is pressed.
4 is slid until it engages with a flange 5 serving as an engaging portion on the surface of the seal cover 4. As a result, the cap 9 is held in the tightened position by the lock arm 13, and the sealing member 20 is tightened and compressed by the cover 4 as the cap 9 slides, and comes into close contact with the connection part of the plug, and the connection part is sealed from the outside. .
To remove the connector A from the plug, press the operating part 15 of the lock arm 13 of the cap 9 to release the lock, move the cap 9 to the non-tightened position of the connector body 1, and then remove the seal member 20. It can be easily removed by releasing the tightening.

FIGS. 5 to 7 each show other embodiments of the present invention. That is, FIG. 5 shows the plug connection insertion hole 2 of the seal member 20° to be loaded into the seal cover 4.
2 has a plurality of annular grooves 23 recessed in the latter half of the inner circumference, and the inner surface is uneven.This improves the adhesion to the plug, and also increases the distance between the edges, which has the effect of preventing leakage current. improves. FIG. 6 shows a flexible connector body 1 in which a locking pawl 24 is protruded in place of the threaded portion 7 of the connector main body 1 of FIG. A locking arm 25 is shown, which allows the cap 17' to be locked with a single touch. FIG. 7 shows the shape of the connector main body 1' when the ignition device is a distributor or ignition coil instead of the spark plug. A receptacle 27 of enlarged diameter is provided for the connection b' at the end of the ignition coil.

As described above, the present invention includes a cylindrical connector body made of a synthetic resin material that houses a high-voltage cord connected to a terminal, and has a split seal cover that extends in the axial direction and is hinged to the front end and can be opened and closed. A tightening cap is mounted on the outer periphery of the connecting device body and the seal cover so as to be slidable in the axial direction between a non-clamped position and a tightened position with respect to the seal cover, and has a lock arm that maintains the tightened position; and the seal. A sealing member for the connection part of the ignition device that is housed in the cover and is tightened by sliding the tightening cap into the tightening position, and another tightening cap that is detachably provided at the rear end of the connector body. , and a sealing member for the high voltage cord which is internally housed in the other tightening cap and is tightened by the connection of the other tightening cap to the connector main body, so that the connecting part of the terminal of the ignition device and the high voltage The sealing connection with the cord can be easily made, and the sealing member for the connection part of the ignition equipment and the high-voltage cord is compressed and sealed for the first time by sliding the tightening cap or tightening the screw. Because of this, there is no fatigue deterioration unlike in conventional rubber caps (Fig. 8), and a good sealing state can be maintained.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal cross-sectional view of a connector showing an embodiment of the present invention, FIG. 2 is a front view thereof, FIG. 3 is an enlarged perspective view of the seal cover 4 portion, and FIG. 4 is an enlarged perspective view of the tightening cap 13. 5 to 7 are longitudinal cross-sectional views of main parts of a connecting device showing other embodiments of the present invention, and FIG.
The figure is an explanatory diagram showing the connection part of a conventional plug and the connection part of a high voltage cord. DESCRIPTION OF SYMBOLS 1... Connector main body, 4... Split seal cover, 9, 17... Tightening cap, 13... Lock arm, 20, 21... Seal member.

Claims (1)

[Claims for Utility Model Registration] A cylindrical connector body made of a synthetic resin material that houses a high-voltage cord connected to a terminal and has a split seal cover that extends in the axial direction and is hinged to the front end and can be opened and closed; a tightening cap that is mounted on the outer periphery of the connecting device body and the seal cover so as to be slidable in the axial direction between a non-clamped position and a tightened position with respect to the seal cover, and has a lock arm that maintains the tightened position; and the seal; A sealing member for the connection part of the ignition device that is housed in the cover and is tightened by sliding the tightening cap to the tightening position; and another tightening cap that is detachably provided at the rear end of the connector body. , a sealing member for the high-voltage cord that is housed in the other tightening cap and is tightened by coupling the other tightening cap to the connector main body, and a connection between an ignition device and a high-voltage cord Ingredients.