JPH0336068Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a so-called blister pack packaging for a spark plug, in which the spark plug is held within a mount and a plastic shell.

[Prior Art] Conventionally, as shown in a cross-sectional view in FIG. 2, a packaging body 1A for a spark plug includes a mount 2A and a plastic shell body 3A having a bulge portion 31A that approximates the outer shape of the spark plug.
The ignition plug 100A is sandwiched between the mount 2A and the plastic shell 3A, and then a plastic thin film 4A is bonded by thermocompression.The ignition plug and the mount are held parallel to each other. The ignition plug was packaged with a hole B provided on the electrode side of the ignition plug mounting bracket.

[Problems to be solved by the invention] When the above-mentioned conventional ignition plug packaging is accidentally dropped, the ignition plug pushes out the packaging and deviates from the normal position where it is held, causing the ignition plug to move in the direction of the arrow C in the empty 〓B. The center electrode 10 is displaced in the direction of
The problem that the dimension of the spark gap 108 between 5A and the outer electrode 103A would be out of alignment was likely to occur.

In addition, spark plugs come in various shapes and sizes, but in order to give strength to the packaging, we prepare plastic shells of various shapes to match the shapes and sizes of the spark plugs, and we also make the shells thick. I needed to.

The purpose of this invention is to prevent the ignition plug from shifting and applying pressure to the electrodes when accidentally dropped, and to prevent the distance between the sparks from going out of order. To provide a packaging body for a spark plug which can be packaged with a plastic shell body of a small variety of shapes and can protect an electrode part even if the shell body is made thin.

[Means for Solving the Problems] In order to solve the above-mentioned problems, the present invention is equipped with a large diameter body, a mounting screw portion with a slightly smaller diameter than the body, and an outer electrode at the end of the mounting screw portion for mounting. An ignition plug made of an insulator holding a center electrode fixed to a metal fitting is sandwiched between a mount and a plastic shell having a bulge approximating the outer shape of the ignition plug. In the packaging body of the ignition plug, the plastic shell has a space between the mount of the part that holds the mounting screw part and the plastic shell, and the space between the plastic shell and the mounting screw part is the tip of the electrode of the mounting screw part. The bulge is formed to be inclined with respect to the mount so that it gradually narrows in the direction, and the spark plug is held at an angle.

[Function] The ignition plug packaging of the present invention is formed so that the electrode portion of the ignition plug is slanted toward the mount so that the space between the mount of the electrode portion and the plastic shell gradually narrows toward the tip. Therefore, even if the ignition plug is subjected to a force that causes it to fly out in the distal direction within the package due to a fall, etc., it is held by the outer periphery of the mounting screw part, and the dimension between the sparks is prevented from being distorted.

[Embodiment] FIG. 1 is a sectional view showing an embodiment of the present invention.

The ignition plug package 1 of the present invention comprises a mount 2, a semi-hard plastic shell 3, a plastic thin film 4, and a ignition plug 100. The ignition plug 100 includes a hexagonal body portion 101 with a large diameter, a mounting screw portion 102 with a slightly smaller diameter than the body portion, and a mounting bracket 104 in which a curved outer electrode 103 is protruded from the end of the screw portion.
A rod-shaped insulator 106 having a center electrode 105 penetrated through its axis is fixed. The mount 2 is a rectangular piece of cardboard that is approximately twice the size of the ignition plug both vertically and horizontally, and has a hole 21 at one end.
is provided. The semi-hard transparent plastic shell 3 is formed by providing a bulge (blister part) 31 in the center of a rectangular thin plate into which the ignition plug 100 is inserted. The bulging portion 31 approximates the outer shape of the slanted ignition plug 100, and the side 3 of the electrode portion of the ignition plug 100
2 is shallow so as to be inclined toward the mount 2 side, and is deep on the side 33 of the terminal electrode end 107, forming a void that gradually becomes shallower toward the tip of the electrode portion.

A spark plug 100 is attached to the bulge 31 of the plastic shell.
is inserted, the outer peripheral edge of the shell body and the mount 2 are fixed with an adhesive, and a plastic thin film 4 is thermocompression bonded from the outside to produce a packaging body 1 for the ignition plug. One half of the spark plug 100 is wrapped in and in contact with the bulge 31 of the shell, the body 101 on the other side is pressed against the cardboard, and the center electrode 105 is supported with the terminal electrode 107 side floating above the mount. . Also, a void D is formed that gradually narrows toward the tip of the electrode portion.

When the ignition plug package 1 of this embodiment is accidentally dropped and receives a strong impact, even if the ignition plug 100 rushes through the air in the direction of arrow E, the mount 2 and the shell body gradually become narrower. 3 and does not deviate greatly from its normal position, it is possible to prevent the spark gap 108 from collapsing.

[Effects of the invention] As stated above, the ignition plug package of the invention has the following advantages:
An ignition plug is made by fixing an insulator that holds a center electrode in a mounting bracket that has a large diameter body, a mounting thread that is slightly smaller in diameter than the body, and an outer electrode at the end of the mounting thread. and a plastic shell having a bulging portion approximating the outer shape of the ignition plug, and the mount and the plastic shell are attached to each other. , a mount for holding the end of the mounting screw portion;
The bulge is formed to be inclined with respect to the mount so that the space between the plastic shell and the mounting screw gradually narrows toward the electrode tip end, and the spark plug is held at an angle. Therefore, even if the spark plug is accidentally dropped and receives a strong impact force, even if the spark plug rushes through the air, it will not deviate significantly from its normal position because it is supported by the gradually narrowing mount and plastic shell, so the spark plug will not deviate greatly from its normal position. This can prevent the dimensions of 〓 from going out of order.

Further, due to the structure in which the cavity is gradually narrowed, even if the size and shape of the spark plug changes somewhat, the spark cavity can be protected by packaging using a common plastic shell.

In addition, the structure in which the air space is gradually narrowed increases the support strength against the impact force in the direction of the tip, and since the impact force is more dispersed by the mount due to the slanted spark plug, the plastic shell can be made thinner. It has sufficient strength.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of a spark plug package according to the present invention, and FIG. 2 is a cross-sectional view of a conventional spark plug package. In the figure, 1, 1A...Spark plug packaging, 2, 2A
...Mount, 3,3A...Plastic shell, 4,
4A...Plastic thin film, 31,31A...Bulging portion, 100,100A...Spark plug, 108,1
08A... Spark space, B, D... Sky.

Claims (1)

[Scope of Claim for Utility Model Registration] An insulator holding a center electrode is fixed to a mounting bracket that has a large-diameter body and a mounting thread that is slightly smaller in diameter than the body, and has an outer electrode at the end of the mounting thread. A spark plug made of the above is sandwiched between a mount and a plastic shell body having a bulge that approximates the outer shape of the spark plug, and
In the ignition plug package formed by adhering a mount and a plastic shell, the plastic shell has a space between the mount and the plastic shell in the portion that holds the mounting screw. 1. A package for a spark plug, characterized in that the bulge is formed to be inclined with respect to the mount so as to gradually narrow toward the tip of the electrode, and the spark plug is held at an angle.