Spark plug cap structure

Abstract

The utility model discloses a spark plug cap structure which comprises a spark plug cap body and a rubber jacket, one end of the spark plug cap body is provided with a self-tapping screw, the other end of the spark plug cap body is provided with a conductive cap, and a conductive spring is arranged between the conductive cap and the self-tapping screw; a through hole communicated with an inner cavity of the conductive cap is formed in the inner end of the conductive cap, and the conductive spring penetrates through the through hole and then extends into the conductive cap; the diameter of the position, close to the inner end of the conductive cap, of the conductive spring is expanded to form an expanded section which is tightly attached to the inner end of the conductive cap. By optimizing the contact design of the spark plug cap and the spark plug, the problem of poor contact of the traditional spark plug cap is solved.

Description

Technical Field

[0001] This utility model relates to the technical field of internal combustion engine ignition systems, and in particular to a spark plug cap structure. Background Technology

[0002] The spark plug cap is a key component in the internal combustion engine ignition system, used to connect the ignition coil and the spark plug, transmitting high-voltage electricity to ignite the air-fuel mixture. Traditional spark plug caps have a fixed structure, and due to automatic deformation or thermal expansion and contraction, their metal contacts are prone to loosening, leading to poor contact and subsequent discharge, which affects ignition efficiency. Utility Model Content

[0003] In view of the above-mentioned shortcomings of the existing technology, the purpose of this utility model is to provide a spark plug cap structure that solves the problem of poor contact of traditional spark plug caps by optimizing the contact design between the spark plug cap and the spark plug.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows: a spark plug cap structure, including a spark plug cap body and a rubber outer sleeve, wherein one end of the spark plug cap body has a self-tapping screw and the other end has a conductive cap, and a conductive spring is provided between the conductive cap and the self-tapping screw; characterized in that: a through hole communicating with the inner cavity of the conductive cap is provided at the inner end of the conductive cap, one end of the conductive spring is connected to the self-tapping screw, and the other end passes through the through hole and extends into the conductive cap; the diameter of the conductive spring near the inner end of the conductive cap is enlarged to form an enlarged section, the diameter of which is larger than the diameter of the through hole, and it is located on the outside of the conductive cap and is in close contact with the inner end of the conductive cap.

[0005] Furthermore, the enlarged section is generally conical, with the diameter of one end near the conductive cap being smaller than the diameter of the other end, and the enlarged end near the conductive cap extending into the through hole.

[0006] Furthermore, the conductive cap is made of copper.

[0007] Furthermore, the conductive cap is provided with two retaining rings at intervals near its outer end, and the portion of the retaining rings is located inside the conductive cap for connection and fixation with the spark plug.

[0008] Furthermore, the length of the portion of the conductive spring extending into the conductive cap is greater than or equal to half the length of the conductive cap.

[0009] Compared with the prior art, the present invention has the following advantages:

[0010] This design involves creating a through hole in the conductive cap, lengthening the conductive spring, and allowing it to pass through the through hole. Simultaneously, the position of the conductive spring near the conductive cap is enlarged, and the enlarged section of the spring presses against the inner end face of the conductive cap, thus preventing the spring from falling off. Furthermore, after assembly with the spark plug, the contact between the conductive spring and the spark plug end face is increased. Because the conductive spring is elastic, it can buffer the impact force during vibration, ensuring the contact stability between the spark plug, the conductive cap, and the conductive spring, thereby improving ignition efficiency. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of this utility model.

[0012] Figure 2 This is a schematic diagram of the structure after the spark plug cap is connected to the spark plug.

[0013] In the diagram: 1—spark plug cap body, 2—rubber sleeve, 3—self-tapping screw, 4—conductive cap, 5—conductive spring, 6—expanded section, 7—circlip. Detailed Implementation

[0014] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0015] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, not all of them. Therefore, the following detailed description of the embodiments of this utility model provided in the accompanying drawings is not intended to limit the scope of the claimed utility model, but merely to represent selected embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

[0016] It should be noted that similar reference numerals and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the figures, or the orientation or positional relationship commonly used when the product is in use. They are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance. In addition, the terms "horizontal," "vertical," etc., do not indicate that the component is required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted. In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0017] Example: See Figure 1 , Figure 2 A spark plug cap structure includes a spark plug cap body 1 and a rubber outer sleeve 2. One end of the spark plug cap body 1 has a self-tapping screw 3, and the other end has a conductive cap 4. A conductive spring 5 is provided between the conductive cap 4 and the self-tapping screw 3. The conductive cap 4 is made of copper for better conductivity. Two retaining springs 7 are spaced apart near the outer end of the conductive cap 4, with portions of the retaining springs 7 located inside the conductive cap 4, for connection and fixation to the spark plug.

[0018] A through hole communicating with the inner cavity of the conductive cap 4 is provided at the inner end of the conductive cap 4. One end of the conductive spring 5 is connected to the self-tapping screw 3, and the other end passes through the through hole and extends into the conductive cap 4. The diameter of the conductive spring 5 near the inner end of the conductive cap 4 is enlarged to form an enlarged section 6. The diameter of the enlarged section 6 is larger than the diameter of the through hole, and it is located on the outside of the conductive cap 4 and is in close contact with the inner end of the conductive cap 4. In practice, the enlarged section 6 is generally conical, with the diameter of the end near the conductive cap 4 being smaller than the diameter of the other end, and the enlarged end near the conductive cap 4 extending into the through hole; thus, it can better contact and press against the conductive cap 4. As an optimization, the length of the portion of the conductive spring 5 extending into the conductive cap 4 is greater than or equal to half the length of the conductive cap 4, which can better contact the spark plug and has greater adaptability.

[0019] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and not to limit the technical solutions. Those skilled in the art should understand that any modifications or equivalent substitutions to the technical solutions of this utility model that do not depart from the spirit and scope of this technical solution should be covered within the scope of the claims of this utility model.

Claims

1. A spark plug cap structure comprising a spark plug cap body and a rubber cover, one end of the spark plug cap body having a self-tapping screw, the other end having a conductive cap, a conductive spring being provided between the conductive cap and the self-tapping screw; characterized in that: A through hole is arranged at the inner end of the conductive cap and communicates with the inner cavity of the conductive cap, one end of the conductive spring is connected with the self-tapping screw, and the other end extends into the conductive cap through the through hole; the diameter of the position of the conductive spring close to the inner end of the conductive cap is expanded to form an expanded section, the diameter of the expanded section is greater than the diameter of the through hole, and the expanded section is located outside the conductive cap and closely contacts the inner end of the conductive cap.

2. The spark plug cap structure of claim 1, wherein: The expanded section is conical as a whole, the diameter of the end close to the conductive cap is less than the diameter of the other end, and the expanded end close to the conductive cap extends into the through hole.

3. The spark plug cap structure of claim 1, wherein: The conductive cap is made of copper.

4. The spark plug cap structure of claim 1, wherein: Two clamping springs are arranged at the position close to the outer end of the conductive cap, and part of the clamping springs is located inside the conductive cap and used for connecting and fixing the spark plug.

5. The spark plug cap structure of claim 1, wherein: The length of the part of the conductive spring extending into the conductive cap is greater than or equal to half of the length of the conductive cap.

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