JP3067944U - Plug-in connector for spark plug - Google Patents

Abstract

A plug connector has a flexible wire spring as a contact portion, which is protected from bending by a frame portion except at least the contact section. . Contact section 23 in assembly direction
A centering section 24 is arranged in front of the contact section 23 and has a larger dimension than the contact section 23. The plug-in connector 11 for the spark plug 13 is realized in such a way that the assembly is carried out in a manner which is technically advantageous. The plug-in connector for the spark plug is provided especially for use in the automotive industry.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention is a plug-in connector for a spark plug, which is electrically connected to the ignition coil on one side and provided on the other side for contact with the spark plug connection. And a flexible electrical insulator forming the jacket of the plug-in connector and surrounding the contact portion, and a frame portion reinforcing the insulator over at least a partial length. About.

[0002]

[Prior art]

 Such a plug-in connector is known from DE-A-38 35 983, in which the contact part of the plug-in connector is a spark plug and the insulator of the plug-in connector is an elastic shoe. In addition, the frame portion of the insertion connector is described as a rigid frame.

[0003] The rigid frame arranged on the outside gives the elastic shoe columnar rigidity, which allows the plug-in connector to be installed in hard-to-access places in the engine room of a car. I have to.

In the elastic shoe, a spark plug formed as a rigid thin plate bent portion is narrowly supported.

[0005] The plug-in connector thus formed forms a significantly inflexible body by internal reinforcement via a spark plug and by external reinforcement via a rigid frame. Reliable and undamaged assembly of the body into the hard-to-access stationary spark plug connection requires precise course control in the introductory movement and costly control steps.

[0006] This undesirably leads to high production costs due to the assembly of the plug-in connector to the spark plug.

[0007]

[Problems to be solved by the invention]

 An object of the present invention is to avoid the above disadvantages.

[0008]

[Means for Solving the Problems]

 According to the invention, the object is attained in accordance with the invention in that the contact part is formed as a flexible wire spring and the contact part at least excludes an ausfederungsfaehig contact section which is elastically extensible. This is solved by being protected against bending by the frame part.

[0009]

[Effect of the invention]

 An advantage of the plug-in connector according to the invention for a spark plug is that the disadvantages mentioned above are avoided. For this purpose, the plug-in connector has a flexible spring element as a contact part, which, due to its offset capability, has a large tolerance for coupling with the connection of the spark plug. In this case, the insertion operation of the plug-in connector can be performed at that time, and even if the introduction is incorrect, the connection portion of the spark plug is prevented from being damaged due to the displacement capability of the contact portion.

[0010] The contact portion is surrounded by the frame portion over a significant portion of the longitudinal extension and is thereby protected from bending.

[0011] The plug-in connector thus formed allows low production costs in the form of short installation times and low control costs due to the joining conditions with great tolerances when assembling to the spark plug. .

Claims 2 and 3 disclose advantageous configurations for realizing the present invention.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION Next, the present invention will be described in detail with reference to the illustrated embodiment.

The plug-in connector 11 produces a mechanical and electrical connection between the ignition coil and the ignition plug 13 in the assembled state.

According to the drawing, the plug-in connector 11 mainly has a contact part 14, an insulator 16 and a frame part 17 arranged symmetrically with respect to the longitudinal axis 18 of the plug-in connector 11.

The contact portion 14 as a central element of the plug-in connector 11 is formed as a flexible wire spring in the shape of a vertically elongated stepped cylindrical coil spring. The central section 19 occupies a significant portion of the longitudinal extension of the contact portion 14. Adjacent to this central section 19, on one side the coil diameter is reduced in the first terminal section 21 of the contact section 14 compared to the diameter of the central section 19, and on the other side the first section The coil diameter of the central section 19 extends over a first part length forming a contact section 23 adjacent to the central section 19 in a second terminal section 22 located on the opposite side of the terminal section 21 of the central section 19. And the coil diameter has not changed relative to the coil diameter of the central section 19 over the second partial length on the end side forming the centering section 24.

A frame part 17 in the form of a plastic sleeve surrounds a central section 19 of the contact part 14 with play of movement. The radial displacement capability of the freely located end sections 21, 22 is not limited by the frame portion 17.

An insulator 16 made of silicone rubber or other flexible electrically insulating material is formed stepwise in the region of the frame portion 17 and conical in the first end 27. It is formed in a sleeve shape having an enlarged through hole 26. The insulation 16 forms the jacket 28 of the plug-in connector 11 and press-fits the frame part 17 in its central part and moves the contact part 14 in the region of its end sections 22, 23. Surrounded by the play of.

In a first assembly step, the plug connector 11 is fixedly attached to the cylindrical high-pressure dome 29 of the ignition coil 12 at the first end 27 of the insulator 16 prior to the centering means. In this case, the first terminal section 21 of the contact portion 14 is brought into electrical contact with a pin-shaped electrode 31 protruding from the end side of the high-voltage dome 29 serving as a high-voltage output portion of the ignition coil 12. It is pushed.

In a second assembly step, the combination of the ignition coil 12 and the plug-in connector 11 is inserted into a spark plug 13 which is fixedly mounted on the internal combustion engine. In that case, the insulator 16 of the plug-in connector 11 is the guiding part 32 on the side opposite to the first end 27, and the centering section 24 of the contact part 14 passes through the ignition plug connection 34 of the ignition plug 13. Then, the contact section 23, which is located behind the centering section 24 in the mounting direction, slides onto the spark plug insulator 33 until it makes electrical contact with the spark plug connection 34. By virtue of the fact that the centering section 24 has a larger coil diameter than the contact section 23, and that the centering section 24 supported via the contact section 23 has a deflection capability, The central section 19 can be supported on the frame part 17, so that it can be guided with great tolerances of the plug-in connector 11 when assembled to the spark plug 13.

This results in short assembly times, low control costs and thus low production costs.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of one embodiment of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 11 Plug-in connector, 12 Ignition coil, 13 Spark plug, 14 Contact part, 16 Insulator, 17 Frame part, 18 Vertical axis, 19 Center section, 2
1 first terminal section, 22 second terminal section, 23
Contact section, 24 centering section, 26 through hole, 27 first end, 28 mantle, 29 high pressure dome, 31 electrode, 32 guide part, 33 spark plug insulator, 34 spark plug connection

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Christian Hauer Germany Stuttgart a Alexanderstrasse 36

Claims (4)

[Utility model registration claims] 1. A plug-in connector for a spark plug,
A contact part (14) electrically connected on one side to the ignition coil (12) and provided on the other side for contacting the spark plug connection (34); ) Forming a mantle (28) and having a contact portion (1).
4) Flexible electrical insulator (1) surrounding
6) and a frame part (17) that reinforces the insulator (16) at least over a partial length, wherein the contact part (14) is formed as a flexible wire spring, A plug-in connector for a spark plug, characterized in that the contact part (14) is protected against bending by at least the frame part (17), except for the elastically extensible contact section (23). . 2. The contact part (14) is embodied as a coil spring, which is connected to a first terminal section (2).
In 1), it is fixed to an electrode (31) as a high-voltage connection of the ignition coil (12) and has a second terminal section (2
2. The plug-in connector as claimed in claim 1, wherein in (2) the plug can be fitted on the spark plug connection (34). 3. The frame part (17) is formed by a sleeve, is disposed on the inside on the insulator (16), and surrounds the central section (19) of the contact part (14) with play of movement. 3. The plug-in connector according to claim 2, wherein: 4. A second end section (22) comprising an end-side centering section (24) and an adjacent contact section (23), on the spark plug connection (34). 4. The plug-in connector according to claim 3, wherein the coil diameter of the contact section for locking of the coil is smaller than the coil diameter of the centering section.