JP3085153B2 - Connection device for high-voltage wires for internal combustion engines - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for connecting a high-voltage resistance wire for an internal combustion engine to a high-voltage component.

[0002]

2. Description of the Related Art A high voltage is supplied from an ignition coil for generating a high voltage to a spark plug provided in each cylinder of an automobile engine via a high-voltage resistance wire. There are a centralized coil system that supplies voltage to each ignition plug from a coil via a distributor, and a direct connection coil system that provides the same number of ignition coils as ignition plugs and supplies voltage directly to each ignition plug from each ignition coil. A high-voltage resistance wire is used for the electrical connection between the distributor and the ignition plug in the centralized coil system and the electrical connection between the ignition coil and the ignition plug in the direct connection type, and the high-voltage resistance wire and these distributors are used. Conventional connection with high-pressure components such as an ignition coil, an ignition plug, etc. It is performed using the terminal body 1 and the connection part 2 consisting al.

[0003] Incidentally, this terminal body 1 is
It is well known as described in Japanese Patent Publication No. 27981, for example, and is configured as shown in FIG. 11, for example, and has a component insertion portion 1a formed on the left end side, and from the center to the right end side A wire holding portion 1b for holding the end of the high-voltage resistance wire in an electrically conductive state, and a component insertion portion 1a
After the connection component 2 is inserted into the terminal body 1, the pins 4 are fitted into the through holes provided in the terminal body 1 and the connection component 2 as shown in FIG. The inserted connection component 2 is fixed. In FIG. 11,
5 is a through hole into which the pin 4 is inserted.

On the other hand, the connecting part 2 is constructed as shown in FIGS. 12 to 16, and formed on a left end face of a substantially cylindrical part main body 2a as a high-pressure part (not shown) such as a distributor as shown in FIG. An insertion hole 2b is formed as a female terminal portion into which the formed male screw-shaped male terminal portion is inserted, and a groove 2c is formed on the peripheral surface of one end of the component body 2a as shown in FIGS. A part of the component body 2a in the groove 2c is further cut out as shown in FIG. 15 to form a notch 2d, and the groove 2c and the notch 2d are made of a piano wire or the like as shown in FIG. A D-shaped connector pin 7 as a holding member having a spring property is fitted as shown in FIG. The connector pin 7 may have a shape in which a D-shaped curved portion is cut off.

At this time, the linear portion of the connector pin 7 fits into the notch 2d as shown in FIG. 13 and abuts against the male terminal of the high-voltage component inserted into the insertion hole 2b, thereby inserting the male terminal. The state of being fitted into the hole 2b is maintained, so that electrical continuity between the high-voltage component and the connection component 2 is reliably maintained.

As shown in FIG. 12, a through hole 2e is provided at the right end of the connection component 2 so that the through hole 2e communicates with the through hole 5 of the component insertion portion 1a of the terminal body 1. After the connection component 2 is inserted into the component insertion portion 1a, the pins 4 are fitted into the through holes 5 and 2e, and the terminal body 1 and the connection component 2 are inserted.
Is fixed.

When a high-voltage resistance wire is gripped by the wire gripping portion 1b, in order to ensure electrical conduction,
In a state where the core wire of the high-voltage resistance electric wire exposed by peeling is folded back along the insulating coating, the wire gripping portion 1b is crimped so that the insulating coating is gripped by the wire gripping portion 1b.

[0008]

However, in the above-mentioned conventional system, the terminal body 1 and the connecting part 2 are fixed by the pins 4.
Therefore, the connecting parts 2 are required, the number of parts is increased, and the work of fitting the pins 4 and a dedicated facility for the work are required, resulting in an increase in cost.

An object of the present invention is to reduce the number of parts, eliminate the need for dedicated equipment, and easily connect a high-voltage resistance wire and a high-voltage component at low cost. .

[0010]

According to the first aspect of the present invention,
In a connection device for a high-voltage electric wire for an internal combustion engine for connecting a high-voltage resistance electric wire for an internal combustion engine to a high-voltage component, an end portion of the high-voltage resistance electric wire is gripped by a wire grip portion of a terminal body, and a male screw-shaped male type of the high-pressure component is provided. A terminal portion is inserted into a component insertion portion of the terminal main body, and a fitting body is fitted to the component insertion portion from outside,
A protrusion formed on the fitting body is engaged with a valley portion of a male screw of the male terminal portion through a through hole of the component insertion portion, thereby ensuring electrical conduction between the male terminal portion and the terminal body. And the male terminal portion is prevented from coming off from the component insertion portion.

Therefore, the high-voltage component can be fixed to the terminal body by preventing the high-voltage component from coming off the component insertion portion only by fitting the fitted body to the component insertion portion of the terminal body. In addition, connection terminals and dedicated equipment as in the case of fixing by conventional pins are not required, and high-voltage resistance wires and high-voltage components can be easily connected at low cost.

At this time, if the projection is formed in a shape to be fitted into the root of the male screw of the male terminal portion as described in claim 2, the projection is more securely locked to the male terminal portion. It can be done reliably.

According to a third aspect of the present invention, there is provided a connection device for a high-voltage resistance wire for an internal combustion engine for connecting a high-voltage resistance wire for an internal combustion engine to a high-voltage component, wherein the component insertion portion is formed on one end side. A terminal body formed on the other end side with an electric wire gripping portion gripped in a state where the terminal portion is electrically connected,
A male screw-shaped male terminal portion formed at a connection portion of the high-voltage component, and a C-shaped fitting body having both ends having an inward restoring force and being fitted to the component insertion portion from outside. A through hole formed in the component insertion portion of the terminal main body, and a male member formed through the through hole formed in a shape to be inserted into the fitting body in a valley portion of a male screw of the male terminal portion. A projection is provided which is inserted and locked into the valley portion of the male screw of the mold terminal portion to prevent the male terminal portion from coming off from the component insertion portion.

Therefore, by fitting the C-shaped fitting body into the component fitting portion of the terminal body, the projection of the fitting body is formed through the through hole of the component fitting portion so that the male screw of the male terminal portion is formed. The protrusion is firmly locked in the valley by the restoring force of both ends of the fitted body to prevent the male terminal part of the high voltage part from coming off the part insertion part, and the high voltage part is inserted into the terminal body. Since it can be fixed, connecting parts and dedicated equipment as in the case of fixing by conventional pins are not required, and the high-voltage resistance wire and the high-voltage parts can be easily connected at low cost.

Here, it is effective that the high-pressure component is a distributor, an ignition coil or a spark plug.

Further, when the electric wire gripping portion grips the insulating coating in a state where the core wire of the high-voltage resistance electric wire exposed by peeling is turned upside down along the insulating coating, The terminal portion of the high-voltage resistance wire can be gripped in a state where the electrical conduction is reliably maintained.

According to a sixth aspect of the present invention, when there are a plurality of through holes in the component insertion portion and a plurality of projections in the fitting body,
Electrical conduction between the high-voltage component and the connection component can be more reliably maintained.

Further, at least one of the projections may be in contact with the ridge portion of the male screw of the male terminal portion.

[0019]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a front view of a separated state of an embodiment of the present invention, FIG. 2 is a side view of a part, FIG. 3 is an operation explanatory view, FIG. FIG. 5 is a view in which a part in a use state is cut.

In these figures, FIGS.
The same reference numerals indicate the same or corresponding components. In the following description, the same reference numerals as those in FIGS. 10 to 16 will be avoided, and only different points from FIGS. 10 to 16 will be described.

Instead of the pins 4 and the through holes 5 and 2e shown in FIGS. 10 to 12, a C-shaped fitting body 11 made of stainless steel or the like having both ends has an inward restoring force is provided. Square through holes 13a and 13b, which are larger than the protrusions to be described later, are provided at two substantially opposing positions of 1a, and are punched inward at positions near both ends of the fitting body 11. The projections 14a and 14b are formed,
Is fitted to the component insertion portion 1a from the outside, so that the two projections 14a and 14b are respectively connected to the male screw valleys of the male terminal portion 17 of the high-voltage component 16 through the two through holes 13a and 13b of the component insertion portion 1a. The high-pressure component 16 is prevented from falling out of the component insertion portion 1a by being inserted into the portion and locked at the same time.

At this time, both projections 14a and 14b are
As shown in the figure, the crest portion is formed so as to have the same inclination angle θ as the inclination angle θ of the groove of the male screw of the male terminal portion 17,
In addition, the two projections 14a and 14b are formed with their positions shifted by a predetermined amount so as to be fitted into the valleys of the male terminal portion 17.

Then, the C-shaped fitting body 11 is connected to the terminal body 1.
The two protrusions 14a, 14b of the fitting body 11 are connected to the male terminal 17 of the high-voltage component 16 through the respective through holes 13a, 13b of the component insertion portion 1a only by fitting into the component insertion portion 1a. The protrusions 14a and 14b are firmly locked to the male screw by the restoring force of both ends of the fitting body 11 to prevent the high-pressure component 16 from coming off from the component insertion portion 1a. Can be fixed to the terminal body 1. After attaching the fitting body 11 to the component insertion portion 1a, the high-voltage component 16
Is inserted, the high-voltage component 16 can be fixed to the terminal body 1.

By the way, such a connection device for a high-voltage resistance electric wire is more specifically used for a plug cord type or the like in addition to a so-called center code type as shown in FIG. 5, and in FIG. Both ends are gripped by the wire gripping portions 1b of the terminal main body 1, respectively, and the male type of the ignition coil as the high voltage component 16 is fitted to the component insertion portion 1a of the terminal main body 1 on the left side of the figure by the fitting body 11. The terminal portion 17 is fixed, and the male terminal portion 17 of the distributor as the high-voltage component 16 is fixed to the component insertion portion 1a of the terminal body 1 on the right side of the figure by the fitting body 11 so as to cover both terminal bodies 1. Is mounted with a rubber member S made of EPDM or the like.

Therefore, according to the above-described embodiment, the high-voltage component 16 can be fixed to the terminal body 1 only by fitting the fitting body 11 to the component insertion portion 1 a of the terminal body 1. This eliminates the need for connecting parts and dedicated equipment as in the case of fixing with pins, and makes it possible to easily connect the high-voltage resistance wire and the high-voltage parts at low cost.

Further, in a state where the core wire of the high-voltage resistance wire exposed by peeling is folded in the opposite direction along the insulating coating, the wire holding portion 1b is used to hold the insulating coating by the wire holding portion 1b.
By caulking b, electrical conduction between the high-voltage resistance wire and the terminal body 1 can be reliably maintained.

Here, the high voltage parts correspond to a distributor, an ignition coil, and a spark plug.

As another embodiment, as shown in FIG. 6, one of the protrusions 14b may be brought into contact with the ridge portion of the male screw of the male terminal portion 17, and in this case as well, FIGS. The same effect as in the case of FIG. 5 can be obtained.

Further, as shown in FIG. 7, a position close to each of both ends of the fitting body 11 and the side opposite to the insertion side of the male terminal portion 17 is cut and raised inward to form a tongue piece. The protrusions 18a and 18b may be formed, or as shown in FIG.
a, 19b may be formed.

Further, when the above-mentioned projections 14a, 14b are processed, as shown in FIG. 9, the inclination angle in the cross section of each of the projections 14b (14a) is inserted into the male terminal 17 indicated by an arrow in the figure. The inclination angle θA on the near side in the direction becomes, for example, 45 ° or more, and the inclination angle θB on the opposite side in the insertion direction.
Is set to, for example, 45 ° or less, the male terminal 1
At the same time, the insertion of the male terminal 17 is prevented.

The through hole of the component insertion portion 1a and the fitting body 1
One protrusion may be one each.

[0032]

As described above, according to the first aspect of the present invention, only by fitting the fitting body to the component fitting portion of the terminal body, the component can be removed from the component fitting portion of the male terminal portion of the high voltage component. The high-voltage components can be fixed to the terminal body by preventing them from coming off, eliminating the need for connection terminals and special equipment as in the case of fixing with conventional pins, reducing the number of components, and easily reducing the cost and cost. Connection between electric wires and high-voltage components can be performed.

At this time, the protrusion is formed into a shape to be inserted into the root of the male screw of the male terminal portion as described in claim 2, so that the protrusion is more securely locked to the male terminal portion. And electrical reliability can be reliably maintained and reliability can be improved.

According to the third aspect of the present invention, since the protrusion can be strongly locked to the valley portion by the restoring force of both ends of the C-shaped fitting body, the high-voltage resistance can be easily and more reliably reduced at low cost. Connection between electric wires and high-voltage components can be performed.

Further, the electric wire is gripped by the electric wire gripping portion in a state where the core wire of the high-voltage resistance electric wire exposed by peeling is folded in the opposite direction along the insulating coating, thereby providing an electric connection. The terminal portion of the high-voltage resistance wire can be gripped in a state in which proper conduction is reliably maintained.

By providing a plurality of through-holes in the component insertion portion and a plurality of projections of the fitting body, the electrical conduction between the high-voltage component and the connection component is more reliably maintained. be able to.

At this time, at least one of the projections may be brought into contact with the male thread of the male terminal portion.

[Brief description of the drawings]

FIG. 1 is a front view of an embodiment of the present invention.

FIG. 2 is a side view of a part of one embodiment of the present invention.

FIG. 3 is an operation explanatory diagram of one embodiment of the present invention.

FIG. 4 is a partially cutaway front view of one embodiment of the present invention.

FIG. 5 is a partially cut-away view of the embodiment of the present invention in use.

FIG. 6 is an enlarged cut front view of a part of another embodiment of the present invention.

FIG. 7 is an enlarged sectional front view of a part of still another embodiment of the present invention.

FIG. 8 is an enlarged cutaway front view of a part of still another embodiment of the present invention.

FIG. 9 is an enlarged cut front view of a part of still another embodiment of the present invention.

FIG. 10 is a front view of a conventional example.

FIG. 11 is a front view of a conventional terminal body.

FIG. 12 is a front view of a conventional connection component.

FIG. 13 is a view as viewed in the direction of the arrows along the line XX ′ of FIG. 12;

FIG. 14 is a sectional view of a part of FIG. 12;

FIG. 15 is a sectional view taken along the line YY ′ of FIG. 14;

FIG. 16 is a side view of a conventional connector pin (holding member).

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Terminal main body 1a Component mounting part 1b Wire gripping part 11 Fitting body 13a, 13b Through-hole 14a, 14b, 18a, 18b, 19a, 19b Projection 16 High-voltage component 17 Male terminal part K High-voltage resistance wire

Continued on the front page (58) Fields surveyed (Int. Cl. ⁷ , DB name) H01R 13/62-13/639 H01R 4/18 H01R 24/14 H01T 13/04

Claims (7)

(57) [Claims] An internal-combustion-engine high-voltage wire connection device for connecting an internal-combustion-engine high-voltage resistance wire to a high-voltage component, comprising: A male screw-shaped male terminal portion is inserted into a component insertion portion of the terminal body, and a fitting body is inserted into the component insertion portion from the outside, and the fitting is inserted through a through hole of the component insertion portion. An internal combustion engine, wherein a projection formed on the body is engaged with a root portion of a male screw of the male terminal portion to prevent the male terminal portion from coming off from the component insertion portion. Connection equipment for high voltage electric wires. 2. The connection device for a high-voltage electric wire for an internal combustion engine according to claim 1, wherein said projection is formed in a shape to be fitted into a root portion of a male screw of said male terminal portion. 3. A connection device for a high-voltage electric wire for an internal combustion engine for connecting a high-voltage electric resistance wire for an internal combustion engine to a high-voltage component, wherein a component insertion portion is formed at one end side to electrically conduct a terminal portion of the high-voltage electric resistance wire. A terminal body having an electric wire gripping portion formed on the other end side, a male screw-shaped male terminal portion formed at a connection portion of the high-voltage component, and both ends having an inward restoring force. A C-shaped fitting body fitted into the component insertion portion from the outside; a through-hole provided in the component fitting portion of the terminal body; The male terminal portion is formed into a shape to be inserted into the root portion of the male screw, and is inserted and locked into the root portion of the male screw of the male terminal portion through the through-hole, so that the male terminal portion comes off from the component insertion portion. A connection device for a high-voltage electric wire for an internal combustion engine, comprising: 4. The connection device for a high-voltage electric wire for an internal combustion engine according to claim 1, wherein the high-voltage component is a distributor, an ignition coil, or an ignition plug. 5. The electric wire gripping part grips the insulating coating in a state where a core wire of the high-voltage resistance electric wire exposed by peeling is folded back in an opposite direction along the insulating coating. 5. The connection device for a high-voltage electric wire for an internal combustion engine according to 1, 2, 3, or 4. 6. The high-voltage electric wire for an internal combustion engine according to claim 1, wherein said through hole of said component insertion part and said projection of said fitting body are respectively plural. Connecting device. 7. At least one of the projections,
7. The connection device for a high-voltage wire for an internal combustion engine according to claim 6, wherein the male terminal portion is in contact with a thread portion of a male screw.