JP3200532B2 - High voltage cable connector - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connector for a high-voltage cable, and more particularly to a connector suitable for an ignition system of a motor vehicle that requires thorough measures against dust and water as well as poor contact.

[0002]

2. Description of the Related Art Conventionally, there is no shortage of devices that use a high voltage, but in a familiar example, an ignition system of an automobile is known. That is, in the ignition system of an automobile, a high voltage is applied to the engine plug from the distributor, and the plug is sequentially discharged. The operating conditions of an automobile are severe, and non-conduction and voltage leakage contribute to an accident. Therefore, conventionally, a high-voltage cable connector as shown in FIGS. 3 and 4 has been applied to the connection between a distributor and a high-voltage cable. This high-voltage cable connector (hereinafter, simply referred to as a connector) 1 is made of a relatively hard cylindrical resin that covers a covered electric wire 2 with a relatively soft rubber cap 3 and has a locking function. The configuration is covered by case 4. The electric wire 2 is connected to an unillustrated ignition plug, and a terminal 5 serving as an external connection terminal is provided at one end of the cap 3, that is, at the lower end in FIG. On the other hand, one end of a case constituting the distributor is provided with a cylindrical tower 6 integrally formed with the case.
(Also referred to as a holding unit), and a connection terminal 7 is provided therein.
Is provided.

[0003] A protruding portion 6a is formed at the tip of the tower portion 6 so as to project in the radial direction of the tower portion.
A flexible locking portion 4a is formed at the tip of the case 4, and the terminal 5 and the connection terminal 7 are electrically connected to each other by locking the locking portion 4a to the protrusion 6a. Then, the connector 1 is fixed to the distributor. A large-diameter portion 3 having a length L1 is located substantially at an intermediate position of the cap 3.
b is formed, and the length L2 of the large-diameter portion 4a of the case 4 accommodating the large-diameter portion 3b is set so as to satisfy L1 ≦ L2. Further, the tip of the cap 3 on the side from which the electric wire 2 is led out is formed with a slope portion 3c and a small diameter portion 3d, and the case 4 covering this portion also corresponds to the above shape. That is, the tip of each of the cap 3 and the case 4 has a tapered shape, so that a slight gap is formed between the two.

[0004] In the connector 1 having the above configuration, the electric wire 2
Is covered with a rubber cap 3 and a resin case 4
In addition, since the case 4 is locked to the tower 6 in addition to the case 4, the case 4 is configured not to come off the tower 6 due to vibration or the like.

[0005]

However, the arrow A in FIG.
When the electric wire 2 is pulled by a relatively strong force as shown in FIG. 3, the case 4 is locked to the tower portion 6, but the cap 3 is stretched in the direction in which it is pulled and becomes thinner. The cap 3 comes out of the terminal and the terminal 5 is pulled out, resulting in poor contact with the connection terminal 7 or non-conduction with the connection terminal 7, so that high pressure is not applied to the ignition plug, which causes an engine trouble. Since these all contribute to engine troubles such as idling malfunction, such problems must be completely avoided. SUMMARY OF THE INVENTION An object of the present invention is to provide a connector for a high-voltage cable configured to be able to extremely reliably prevent a connection failure due to an unexpected situation such as pulling of an electric wire.

[0006]

An object of the present invention is to provide an electric wire having an external connection terminal at one end, a soft cap for covering the electric wire and the external connection terminal, and a hard case for covering the soft cap. In the high-voltage cable connector provided, a plurality of steps that change from a large diameter to a small diameter in a direction in which the electric wires are connected are formed in the soft cap, and the plurality of steps are engaged with the rigid case. facing step portion is formed, and the outer diameter of the flexible cap is configured largely the rigid casing inside diameter the same or slightly Rutotomoni, wire end of the flexible cap
Between the stepped portion of the rigid case and the stepped portion at one end of the rigid case.
The object is attained by a connector for a high-voltage cable, wherein a connector is configured to form a rear lance . Also ,
The length of the large diameter portion which constitutes the contact portion between the distal end of the holding portion provided with the connection terminals before Symbol soft cap, larger configuration than the length of the large-diameter portion housing portion that covers the large diameter portion in the rigid casing The above-described object can be achieved even when the end surface of the large-diameter portion is pressed against the tip of the holding portion in the mounted state.

[0007]

In the high-voltage cable connector, a plurality of steps are formed in the flexible cap covering the electric wires and the external connection terminals in a direction in which the electric wires are led out, and the plurality of steps are formed in the hard case covering the soft cap. Tomo and are formed
A step portion at the end of the flexible cap on the electric wire side and the hard cap.
Clearance is formed between the step and the step at one end of the case.
Have been. Therefore, if the wire is undesirably pulled and the soft cap is deformed and tries to shift in the direction in which the wire is drawn,
It will be locked to the step of the hard case,
By setting the dimensions so that the soft cap is pushed into the hard case, the soft cap is held in a substantially hard state in the hard case. Is extremely reliable, and it is possible to exert an extremely large resistance against a pulling force in a direction of coming out of the hard case. Further, since the clearance is formed between the step portion of one end of the rigid casing and the stepped portion of the end portion of the wire-side of the soft cap, when the wire is pulled,
The extension of the soft cap can be allowed by the clearance at the step at the end, and the pulling force can be prevented from being concentrated on the step. Further, the high-voltage cable connector is a soft cap, which has a large-diameter portion formed at a contact position with a mating connection terminal, and further covers the large-diameter portion with the large-diameter portion of the hard case. The length of the diameter part is longer than the length of the large diameter part of the hard case, in other words, the large diameter part of the soft cap is protruded partly, and this large diameter part is pressed into contact with a part of the connection terminal of the other party. ing.

[0008]

1 and 2, an embodiment of a high voltage cable connector to which the present invention is applied will be described. FIG. 1 is a cross-sectional view showing the configuration of the connector, and FIG. 2 is a cross-sectional view for explaining a detachment preventing operation. Members having the same functions as those of the conventional example are denoted by the same reference numerals. The connector 11 according to the present embodiment is configured such that the covered electric wire 2 is
Cylindrical resin case 1 covered with and provided with a locking function
4. The cap 13
Corresponds to the soft cap according to the present invention, and the case 14 corresponds to the hard case. Then, the electric wire 2 is connected to a spark plug (not shown), and one end of the cap 13, that is, FIG.
, A terminal 15 serving as an external connection terminal is provided at the lower end. On the other hand, at one end of the case constituting the distributor, a cylindrical tower portion (holding portion) 6 is provided integrally with the case, and a connection terminal 7 is provided therein. The connection terminal 7 corresponds to the connection terminal of the other party, and the tower 6 in which the connection terminal 7 is embedded corresponds to the holding unit.

The tower portion 6 has a projection 6a formed on the tip end thereof, which protrudes in the radial direction of the tower portion. A flexible locking portion 14a is provided at the tip of the case 14.
The terminal 15 and the connection terminal 7 are electrically connected to each other by locking the locking portion 14a to the protrusion 6a, and the connector 11 is fixed to the distributor. A large diameter portion 13b whose axial length is indicated by L11 is formed at a substantially intermediate position of the cap 13, and a case 14 for accommodating the large diameter portion 13b.
The relationship with the axial length L12 of the large-diameter portion storage portion 14d is set to the relationship of L11> L12.

[0010] By the way, the tip on the side from which the electric wire 2 is led out by the cap 13 is formed on a slope in the conventional example.
In this embodiment, the small diameter portion 13c is formed on the small diameter portion 13c.
The entirety c is housed in the small diameter portion 14b of the case 14. Therefore, as for the cap 13, the large-diameter portion 13
b between the main body portion having a smaller diameter than the large diameter portion 13b.
Of the main body and the small diameter portion 13 are formed.
b, a second step portion 21b is formed, and the end face 13d
The third step portion 21c is formed between the wire and the electric wire 2. The outer diameter of the soft cap 13 is the same as or slightly larger than the inner diameter of the hard case 14 (in FIG. 1, there is a gap for convenience, but there is no actual gap). That is, the hard case 1
The dimensions are set such that the soft cap 13 is pushed into the inner space 4. Therefore, the soft cap 13 is held in the hard case 14 in a substantially hardened state, so that the engagement at the step portion can be more reliably performed.

On the other hand, the case 14 also has a large diameter portion 14.
a first step portion 22a is formed between the small diameter portion 14b and the first step portion 22a, and a second step portion 22b is formed between the main body portion and the small diameter portion 14b. The tip 14c is bent at a right angle so as to cover the end face 13d, and the electric wire 2 is drawn out from the central portion. In addition, since the clearance D is formed between the tip 14c and the end surface 13d, even when the electric wire 2 is pulled, it is possible to avoid applying a force that presses the end surface 13d, and the cap 13 and the electric wire 2 are prevented from being pressed. Can be prevented from peeling off.

In the connector 11 having the above configuration, FIG.
L11> L when locked to the tower 6 as shown in FIG.
Due to the relationship of 12, the end face of the large diameter portion 13b is pressed against the tip of the tower portion 6 to improve the sealing property and to maintain good waterproof and dustproof properties. Then, when a force acting to pull the electric wire 2 in the direction of the arrow A acts, the following remarkable actions are performed. That is, when the electric wire 2 is pulled in the direction of arrow A as shown in FIG.
The whole is pulled in the direction of arrow A and stretched appropriately. As a result, the small-diameter portion 13c extends in the direction of arrow A to reduce the clearance D, the small-diameter portion 13c, the main body portion, and the large-diameter portion 13b expand as indicated by the arrow X, and the cap 13 is
Is pressed from inside. Then, even if the entire cap 13 is pulled in the direction of arrow A, the steps 21a, 21b are locked by the steps 22a, 22b of the case 14, and the cap 13 is completely prevented from coming off as in the conventional example.

It should be further noted that since L11> L12, the large diameter portion 13b and the tip 6b of the tower portion 6 can be brought into pressure contact with each other. Therefore, the large diameter portion 1
By utilizing the elasticity of the shaft 3b in the axial direction, the initial locking force between the case 14 and the tower portion 6 can be increased, and rattling can be avoided. Although the mounting structure in the above embodiment has been described by exemplifying the case of mounting to a distributor, it is needless to say that the present invention may be configured to directly mount to the coil side without using a distributor.

[0014]

As described above, the connector for a high-voltage cable according to the present invention has a plurality of flexible caps covering the electric wires and the external connection terminals, each having a surface substantially perpendicular to the axial direction of the electric wires. And a plurality of steps corresponding to the steps are also formed in the hard case covering the soft cap, and the power of the soft cap is formed.
A step at the end on the wire side and a step at one end of the rigid case;
A clearance was formed between the two. Therefore, when the wire is undesirably pulled and the soft cap is deformed and shifts in the wire drawing direction, the step portion of the soft cap is locked to the step portion of the hard case at a plurality of positions. A large locking force can be exerted in the axial direction. Furthermore, it has become a dimensioned such as to push the soft cap in the hard case, since it is held in a condition that substantially rigid in the soft cap in the hard case, the cross-sectional difference portion caught engagement is extremely reliable in, Ru can exhibit a very high resistance to exit direction of the pulling force from the rigid casing. In addition, the end of the flexible cap on the electric wire side
Clear between the step and the step at one end of the rigid case
The wire was pulled because the lance was formed
Sometimes it is this clearance at the step at this end
The elastic cap can be allowed to stretch, and the tensile force
It is possible to avoid concentration on the step. There
Thus, it is possible to prevent the connection from the hard case and the mating connection terminal from coming out, and to improve the reliability of the device using the high-voltage cable connector. Furthermore,
The high-voltage cable connector of the present invention is a soft cap, a large-diameter portion is formed at a contact position with a mating connection terminal, and the large-diameter portion is further covered with a large-diameter portion storage portion of a hard case, The length of the large-diameter portion of the soft cap is longer than the length of the large-diameter portion of the hard case, and the large-diameter portion is pressed against a part of the mating connection terminal. As a result, it is possible to prevent rattling between the hard case and its mounting portion, and it is possible to enhance the function of holding the connector.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a configuration of a high-voltage cable connector according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view showing an operation corresponding to the pulling of an electric wire.

FIG. 3 is a cross-sectional view illustrating a configuration of a conventional high-voltage cable connector.

FIG. 4 is a cross-sectional view showing an operation corresponding to pulling of an electric wire.

[Explanation of symbols]

 2 Electric wire 6 Tower section 7 Connection terminal 11 Connector for high voltage cable 13 Soft cap 13a Locking section 13b Large diameter section 13c Small diameter section 13d End face 14 Hard case 14b Small diameter section 14d Large diameter section storage section 15 Terminals 21a to 21c, 22a, 22b Step

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) H01R 13/533 H01R 4/22 H01R 13/52 H01R 4/18 F02P 7/02

Claims (2)

(57) [Claims] 1. A high-voltage cable connector comprising: an electric wire provided with an external connection terminal at one end; a soft cap covering the electric wire and the external connection terminal; and a hard case covering the soft cap. Forming a plurality of steps that change from a large diameter to a small diameter in the connection direction of the electric wire, and forming a plurality of opposed steps that lock the plurality of steps in the hard case; and The outer diameter of the soft cap is equal to or slightly larger than the inner diameter of the hard case.
And a step at the end of the flexible cap on the electric wire side.
Between the step and the step at one end of the rigid case
A connector for a high-voltage cable, characterized in that a connector is formed. 2. A connection terminal is provided on the soft cap.
Length of the large diameter part that forms the contact part with the tip of the girder holding part
However, in the hard case, a large diameter portion covering the large diameter portion is provided.
It is configured to be larger than the length of the storage section, and the installation state
At the time, the end face of the large diameter portion is pressed against the tip of the holding portion.
The method according to claim 1, wherein:
High voltage cable connector.