JP3798472B2 - Plug terminal - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an improved plug terminal that can be connected to a high-pressure electrode of an ignition plug of an internal combustion engine and an ignition coil tower with a structure of both male and female.
[0002]
[Prior art]
The plug terminal for the spark plug of the conventional internal combustion engine and the plug terminal for the high voltage electrode of the ignition coil tower are not compatible with each other, that is, as a plug terminal for the spark plug, as shown in the side view of FIG. As the plug terminal for the high voltage electrode of the ignition coil tower, the type configured as the male terminal 11 as shown in the side view of FIG.
[0003]
The female plug terminal 7 is formed integrally with a cord fixing portion 6 that closely contacts and grips the vicinity of the terminal portion of the high-voltage cord 5 from the outer surface by compression deformation, and is aligned in the vertical direction of a circumferential wall surface that is curved in a cylindrical shape. A cord cap portion formed by bridging the outer peripheral wall surface of the end edge with a half ring 9 so that the end edge (not shown) does not widen, and further, the whole including the high-pressure cord 5 is formed of an insulating synthetic resin 8 was installed.
The conventional female plug terminal 7 configured as described above is fitted from above to the plug head of the spark plug portion 3 screwed to the bottom of the engine hole portion 2 in the vertical hole shape of the engine case portion 1. The lower end surface of the cord cap portion 8 is inserted into the groove portion formed in the upper end surface of the elastic cap portion 4 made of an insulating synthetic resin mounted in the vicinity of the plug head portion of the spark plug portion 3. It was.
[0004]
On the other hand, a plurality of male plug terminals 11 are formed on the outer surface of the peripheral wall formed integrally with the cord fixing portion 10 that tightly contacts and grips the vicinity of the terminal portion of the high-voltage cord 5 from the outer surface and is cylindrically curved. Each of the contact protrusions 13 protrudes, and the lower end portion is provided with a plurality of slits 12 and has a tip portion that is divided.
The conventional male plug terminal 11 configured as described above is press-fitted from above into the inner peripheral surface of the high-voltage electrode 16 mounted in the connection hole 15 of the ignition coil tower 14 so that the slit 12 is inserted. The tip portion having the taper is compressed to be slightly tapered. As a result, the contact protrusion 13 contacts the inner peripheral surface of the high-voltage electrode 16 to complete the connection.
[0005]
[Problems to be solved by the invention]
However, as described above, the female plug terminal 7 for the spark plug of the conventional internal combustion engine and the male plug terminal 11 for the high voltage electrode of the ignition coil tower 14 are not interchangeable and take a dedicated structure. When connecting the other end of the high voltage cord 5 whose end is connected to the ignition coil tower 14 to the spark plug 3 and applying a high voltage to the spark plug 3, the terminals must be prepared individually. As a result, it was difficult to reduce the number of assembly parts.
[0006]
An object of the present invention is to solve the above-mentioned problems of the prior art and to provide an improved plug terminal so that it can be connected to a spark plug of an internal combustion engine and a high voltage electrode of an ignition coil tower with a male / female structure. It is what.
[0007]
[Means for Solving the Problems]
An object of the present invention is to integrally form a cord fixing portion that closely contacts and grips the vicinity of the terminal portion of the high-voltage cord from the outer surface by compression deformation, and equally divides the outer periphery of the cord fixing portion from the lower end portion of the cord fixing portion. A plug terminal that branches and extends from a position to extend and can be expanded and compressed in the longitudinal and radial directions, wherein the plug terminal has a first bent portion that protrudes outward and a first protrusion that protrudes inward . In the plug terminal having the two bent portions and the guide tip portion bent outward, the first bent portion is for contacting the inner peripheral surface of a separate female terminal to be connected. The second bent portion is achieved by a plug terminal which is for contacting an outer peripheral surface of a separate male terminal to be connected .
[0010]
Further, the object of the present invention is that the guide tip bent toward the outside contacts the inner peripheral surface of each female terminal and the outer peripheral surface of the male terminal to be connected, and the entire plug terminal is vertically and This is achieved by a plug terminal that is guided so as to expand and compress in a radial direction.
[0011]
The plug terminal of the present invention is formed integrally with a cord fixing portion that tightly contacts and grips the vicinity of the terminal portion of the high-voltage cord from the outer surface, and branches and extends from the lower end portion of the cord fixing portion into a plurality of wires, A plug terminal that is expandable and compressively deformable in the longitudinal and radial directions, wherein the plug terminal is bent toward the outside, a first bent portion that is bent toward the outside, a second bent portion that is bent toward the inside, and the outside. Since the guide tip is bent, it is flexibly connected to the male and female counterparts to be connected.
[0012]
Furthermore, in the plug terminal according to the present invention, the first bent portion bent toward the outside serves as a contact portion with respect to the inner peripheral surface of the female terminal to be connected. Therefore, it is necessary to project a special contact protrusion. And the structure is simplified.
[0013]
Furthermore, in the plug terminal according to the present invention, the second bent portion bent toward the inside becomes a contact portion with respect to the outer peripheral surface of the male terminal to be connected, so that it is not necessary to project a special contact protrusion. , The structure is simplified.
[0014]
Further, in the plug terminal of the present invention, the guide tip bent toward the outside contacts the inner peripheral surface of each female terminal and the outer peripheral surface of the male terminal to be connected, and the entire plug terminal is Since it is guided so as to expand and compress in the radial direction, it is deformed flexibly in accordance with the male and female shapes of the mating terminal to be connected.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment of the plug terminal of the present invention will be described in detail below with reference to the accompanying drawings.
1 to 3 are side views showing a plug terminal 21 of the present invention applied to an ignition plug 3 of an internal combustion engine. In particular, FIG. 1 shows a state in which the plug terminal 21 is completely fitted to the ignition plug 3. FIG. 3 shows a state at the start of fitting.
4 to 5 are side views showing the plug terminal 21 of the present invention applied to the high voltage electrode 16 of the ignition coil tower 14. FIG. 4 shows the state at the start of insertion, and FIG. 5 shows the state at the end of the insertion. It is a thing.
[0016]
The plug terminal 21 of the present invention is formed integrally with a cord fixing portion 20 that closely contacts and grips the end portion of the high-voltage cord 5 by compression deformation from the outer surface, and has a plurality of arm shapes from the lower end portion of the cord fixing portion 20. It is configured to be branched and stretched, and to be expanded and compressed in the radial direction.
Further, the plug terminal 21 is mounted in the cord cap portion 8 which is entirely made of an insulating synthetic resin, including the high-voltage cord 5, similarly to the conventional spark plug plug terminal 7, and the engine case portion. Insulating composite that is fitted from above to the plug head 3a of the spark plug portion 3 screwed into the bottom of the engine hole portion 2 having a vertical hole 1 and is mounted in the vicinity of the plug head 3a. The lower end surface of the cord cap portion 8 is inserted into and connected to the groove portion formed on the upper end surface of the elastic cap portion 4 made of resin.
[0017]
Further, the plug terminal 21 includes a first bent portion 22 that is bent outward from a portion close to the cord fixing portion 20 to a distal end portion, a second bent portion 23 that is bent inward, and outward. And the first bent portion 22 bent toward the outside is formed of the high-voltage electrode 16 of the ignition coil tower 14 corresponding to the female terminal to be connected. It becomes a contact part with respect to an internal peripheral surface.
[0018]
On the other hand, the second bent portion 23 bent toward the inside becomes a contact portion with respect to the outer peripheral surface of the plug head 3a of the spark plug 3 corresponding to the male terminal to be connected.
The guide tip 24 bent outwardly contacts the inner peripheral surface of each female terminal to be connected and the outer peripheral surface of the male terminal, and expands and compresses the entire terminal in the longitudinal and radial directions. Therefore, it flexibly deforms and responds to the male and female shapes of the mating terminal to be connected.
Since the entire plug terminal 21 bent as described above also has a spring function, for example, even if an excessive amount of insertion is added to the high voltage electrode 16 of the ignition coil tower 14, It bends in the radial direction and maintains a good connection.
[0019]
【The invention's effect】
Plug pin of the present invention configured as described above are those which exhibit the following referred such novel effects. That is, the plug pin of the present invention, adhesion by compression deformation of the terminal portion near the high-pressure cord from the outer surface, the lower end portion of the cord retainer portion integrally with formed and the cord fixing unit for gripping the cord retainer portion extending branches to a plurality of the equally divided positions of an outer peripheral, longitudinal and radial expansion, a compressive deformable plug terminal, the plug pin is first bent portion which is convex outward, inward in plug terminal provided with the guide tip that is bent toward the second bent portion and an outer which is convex in the first bent portion is in contact with the inner peripheral surface of the female terminal of the separate to be connected Since the second bent portion is for contacting the outer peripheral surface of a separate male terminal to be connected, the second and the second terminals are connected to the male and female forms of the mating terminal to be connected. It became possible to connect flexibly.
[0020]
Furthermore, in the plug terminal 21 of the present invention, the first bent portion 22 bent toward the outside serves as a contact portion with respect to the inner peripheral surface of the female terminal to be connected. There is no need, and the structure can be simplified.
[0021]
Further, in the plug terminal 21 of the present invention, since the second bent portion 23 bent toward the inside becomes a contact portion with respect to the outer peripheral surface of the male terminal to be connected, it is necessary to project a special contact protrusion. It became possible to simplify the structure.
[0022]
Furthermore, the plug terminal 21 of the present invention has a guide tip 24 that bends toward the outside in contact with the inner peripheral surface of each female terminal to be connected and the outer peripheral surface of the male terminal. Since it is guided to expand and compressively deform in the direction and the radial direction, it is possible to flexibly deform and cope with the shape of the male and female of the counterpart terminal to be connected.
[0023]
Since the entire plug terminal 21 bent as described above also has a spring function, for example, even if an excessive amount of insertion is added to the high voltage electrode 16 of the ignition coil tower 14, It has become possible to bend in the radial direction and maintain a good connection. In addition, since it has been improved so that it can be connected with a male / female type structure, it is also possible to reduce the number of assembly parts.
[Brief description of the drawings]
FIG. 1 is a side view of a plug terminal of the present invention showing a state where it is completely fitted to a spark plug.
FIG. 2 is a side view of the plug terminal of the present invention.
FIG. 3 is a side view of the plug terminal of the present invention showing a state at the start of fitting to the spark plug.
FIG. 4 is a side view showing a state at the start of insertion of the plug terminal of the present invention applied to the high voltage electrode of the ignition coil tower.
FIG. 5 is a side view showing a state at the end of insertion of the plug terminal of the present invention applied to the high voltage electrode of the ignition coil tower.
FIG. 6 is a side view showing a plug terminal for a spark plug of a conventional internal combustion engine.
FIG. 7 is a side view showing a plug terminal for a high voltage electrode of a conventional ignition coil tower.
[Explanation of symbols]
1 Engine case 2 Engine hole 3 Spark plug
3a Plug head 4 Elastic cap 5 High pressure cord
6,10,20 Cord fixing part
7,11 Conventional plug terminal 8 Cord cap part 9 Half ring
12 Slit
13 Contact protrusion
14 Ignition coil tower
15 Connection hole
16 High voltage electrode
21 Plug terminal of the present invention
22 First bend
23 2nd bending part
24 Guide tip

Claims (2)

The vicinity of the end of the high-voltage cord is formed integrally with the cord fixing portion that tightly contacts and grips from the outer surface by compression deformation, and branches from the lower end portion of the cord fixing portion to a plurality of equal parts on the outer periphery of the cord fixing portion. A plug terminal that can be extended and compressed in the longitudinal and radial directions,
In the plug terminal, the plug terminal includes a first bent portion that protrudes outward, a second bent portion that protrudes inward, and a guide tip that bends outward .
The first bent portion is for contacting the inner peripheral surface of a separate female terminal to be connected, and the second bent portion is in contact with the outer peripheral surface of a separate male terminal to be connected. plug terminal, characterized in that is used to.   The guide tip bent toward the outside contacts the inner peripheral surface of each female terminal to be connected and the outer peripheral surface of the male terminal, so that the entire plug terminal is expanded and compressed in the longitudinal and radial directions. The plug terminal according to claim 1, wherein the plug terminal is guided to the plug terminal.

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