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spark plug connector

A technology for spark plugs and appliances, which is applied to spark plugs, spark plugs, and spark ignition controllers, etc., can solve the problems of sufficient increase in the fixing force of the terminal connection part and the detachment of the terminal connection part.

Active Publication Date: 2016-08-31
NGK SPARK PLUG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] However, only by reducing the inner diameter of the mounted portion, the fixing force of the terminal connecting portion to the main body cannot be sufficiently increased, and there is still a risk of the terminal connecting portion being detached.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

no. 1 Embodiment approach 〕

[0086] figure 1 (a) is a sectional view of a spark plug cap 1 as a spark plug connector, figure 1 (b) is a front view of the spark plug cap 1 .

[0087] The spark plug cap 1 is composed of a curved terminal body 2 as a main body, a plug-side rubber member 3 attached to one end of the terminal body 2 , and a wire-side rubber member 4 attached to the other end of the terminal body 2 .

[0088] The terminal main body 2 has a cylindrical shape and is formed of a thermosetting resin (for example, unsaturated polyester resin) excellent in heat resistance and voltage resistance. In addition, the terminal main body 2 is bent at an acute angle at approximately the middle portion, and includes a relatively large-diameter first main body constituting portion 21 extending along the first axis CL1 and extending along a second axis CL2 intersecting the first axis CL1. The second body configuration part 22 having a smaller diameter than the first body configuration part 21 is configured. ...

no. 2 Embodiment approach 〕

[0155] Next, a second embodiment will be described. In this second embodiment, if Figure 8 As shown, a plurality of grooves 643 extending in a direction perpendicular to the circumferential direction of the convex portion 641 are formed on the outer periphery of the convex portion 641 . The grooves 643 are formed by rolling the outer peripheral surface of the convex portion 641 , and are provided at equal intervals (for example, 0.3 mm to 0.8 mm each) along the circumferential direction of the convex portion 641 . And, if Figure 5 As shown, the width W of each groove portion 643 along the circumferential direction of the convex portion 641 is 0.05 mm˜0.25 mm. In addition, the depth D of each groove portion 643 is set within a predetermined range (for example, 0.05mm˜0.15mm).

[0156] return Figure 8 , in the present embodiment, the length L of the groove portion 643 along the central axis CL3 is set to be 0.3 mm or more. In addition, in this embodiment, the groove part...

no. 3 Embodiment approach 〕

[0198] Next, a third embodiment will be described. In this third embodiment, if Figure 9 As shown, when the outer diameter of the convex portion 641 is E (mm) and the outer diameter of the concave portion 642 is F (mm), 0.05≦EF (in this embodiment, 0.15≦EF ≤0.35). In addition, the outer diameter E of the convex portion 641 refers to the outer diameter of the end portion of the convex portion 641 on the side of the concave portion 642 in more detail, and the outer diameter F of the concave portion 642 refers to the outer diameter of the convex portion of the concave portion 642 in more detail. The outer diameter of the end on the 641 side.

[0199] Meanwhile, in the present embodiment, a plurality of groove portions 643 extending in a direction perpendicular to the circumferential direction of the convex portion 641 are formed on the outer periphery of the convex portion 641 . The grooves 643 are formed by rolling the outer peripheral surface of the convex portion 641 , and...

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PUM

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Abstract

The spark plug connector includes: a terminal body (2); and a terminal connection portion (64), which has a convex portion (641) and a concave portion (642); the spark plug connector satisfies any of the following (A) to (C) By. (A) When the length of the convex part (641) along the central axis (CL3) of the terminal connection part (64) is A (mm), the length of the concave part (642) along the central axis (CL3) is B (mm), satisfy A≥1.5, B≥2.0 and A / B≤7 / 4. (B) A plurality of grooves ( 643 ) are formed on the outer periphery of the protrusion ( 641 ), the length of the grooves ( 643 ) is 0.3 mm or more, and the width W of the grooves ( 643 ) is 0.05 mm to 0.25 mm. (C) When the outer diameter of the convex part (641) is E (mm) and the outer diameter of the concave part (642) is F (mm), 0.05≦EF is satisfied. By satisfying any one of (A) to (C)), detachment of the terminal connection portion ( 64 ) from the terminal main body ( 2 ) is more reliably prevented.

Description

technical field [0001] The present invention relates to plug connection devices such as plug caps and plug cords connected to spark plugs. Background technique [0002] A spark plug connector connected to a terminal electrode of a spark plug, such as a spark plug cap and a spark plug wire, includes: a metal cylindrical terminal connection portion through which the terminal electrode penetrates the inner circumference of the terminal connection portion itself; and a resin main body portion, which It is provided on the outer periphery of the terminal connection portion (for example, refer to Patent Document 1, etc.). [0003] In addition, the main body has an annular mounted portion into which the terminal connection portion is inserted and fixed, and the inner diameter of the mounted portion is smaller than the outer diameter of a part of the terminal connection portion inserted into the mounted portion. As a result, the terminal connection portion is pressed radially inward...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01T13/04F02P13/00
CPCF02P13/00H01T13/04
Inventor 太田淳平夫马智弘
Owner NGK SPARK PLUG CO LTD