Safety type ignition coil

Abstract

The utility model discloses a safe ignition coil, including ignition coil body, protection structure, ignition structure, outer shield shell, inner shield shell and conductive metal wing piece, the outside of ignition coil body is equipped with protection structure, and one end of ignition coil body is connected with ignition structure, protection structure includes outer shield shell, inner shield shell and conductive metal wing piece, and the outside of outer shield shell is located inner shield shell, and the inner wall of inner shield shell is located conductive metal wing piece and with ignition coil body outer wall contact, the ignition coil body is by the core, secondary coil, primary coil, shell and high -voltage terminal post and is composed, the outside of core is in proper order with secondary coil, primary coil and shell, and high -voltage terminal post is located the one end of core, and the utility model discloses can improve the safety performance of ignition coil body, and avoid the situation of static electricity.

Description

Technical Field

[0001] This utility model relates to the technical field of ignition coil design, particularly the technical field of safety ignition coils. Background Technology

[0002] In an engine ignition system, the ignition coil is an actuator that provides ignition energy to ignite the air-fuel mixture in the engine cylinder. It is a special pulse transformer based on the principle of electromagnetic induction that can convert a low voltage of 10-12V into a voltage of 25000V or even higher.

[0003] Currently, ignition coils typically consist of a main coil, a secondary coil, a center core, and an outer core. The outer core is located radially outside both the main coil and the secondary coil. The mounting component is basically cylindrical and has an inner edge. The mounting component is assembled onto the outer core via the inner edge. However, this type of ignition coil is relatively large and not conducive to installation.

[0004] To address the problems mentioned above, for example, application number CN201220238886.X discloses an ignition coil, comprising a cylindrical outer shell and an iron core axially inserted within the outer shell. A primary coil is wound around the outer wall of the iron core, and a frame is provided outside the primary coil. A secondary coil is wound on the frame. Base plates are provided at both ends of the outer shell, and paraffin wax is filled into the gaps in the inner cavity of the outer shell. Low-voltage terminal blocks are respectively installed on the two base plates, and high-voltage terminal blocks are installed on the side walls of the outer shell. The two ends of the primary coil are respectively connected to the two low-voltage terminal blocks, and one end of the secondary coil is connected to the primary coil, while the other end is connected to the high-voltage terminal block. By connecting and disconnecting the power supply through the primary coil, a very high voltage is induced in the secondary coil, thereby enabling the spark plug to ignite. The secondary coil obtains a large amount of energy, has high energy conversion efficiency, and has the advantages of small size, compact structure, and long service life, and can be widely used in electronic ignition systems.

[0005] However, in the aforementioned patents, the socket and the outer casing are molded as a single piece. During the assembly process, it is difficult to control the connection between the pins on the socket and the electronic module, resulting in unreliable connections and high assembly difficulty.

[0006] To address the problems mentioned above, for example, application number CN201821390716.7 discloses an ignition coil, including a housing, an electronic module, an iron core, a low-voltage tube, a high-voltage tube, and a high-voltage head. The housing has a socket, which is detachably connected to the housing. A plug-in block is provided at one end of the socket. The plug-in block includes a positioning plate and a plug plate, which are connected by a connecting plate. This allows the socket and the housing to be detachably connected through the plug-in block and the side opening on the housing, making the installation of the socket more convenient. At the same time, the limiting plate and positioning post in the inner cavity of the housing can make the positioning of the electronic module more reliable and accurate, ensuring a more reliable and stable connection between the electronic module and the pins on the socket. This achieves the technical effect of reliable connection between the socket and the electronic module.

[0007] However, the aforementioned patents still have the following drawbacks:

[0008] The ignition coil in this structure is relatively simple. During the production process, the lack of protective devices can easily lead to static electricity buildup, causing the device to ignite unnecessarily, resulting in poor safety performance. Summary of the Invention

[0009] The purpose of this invention is to solve the problems in the prior art by proposing a safe ignition coil that can improve the safety performance of the ignition coil body and avoid static electricity.

[0010] To achieve the above objectives, this utility model proposes a safety ignition coil, comprising an ignition coil body, a protective structure, an ignition structure, an outer shielding shell, an inner shielding shell, and conductive metal fins; the protective structure is sleeved on the outside of the ignition coil body, and one end of the ignition coil body is connected to the ignition structure; the protective structure includes an outer shielding shell, an inner shielding shell, and conductive metal fins, the outer shielding shell being located outside the inner shielding shell, and the conductive metal fins being located on the inner wall of the inner shielding shell and in contact with the outer wall of the ignition coil body.

[0011] Preferably, the ignition coil body consists of an iron core, a secondary coil, a primary coil, a housing, and a high-voltage terminal. The secondary coil, the primary coil, and the housing are sequentially fitted onto the outside of the iron core, and the high-voltage terminal is located at one end of the iron core.

[0012] Preferably, the inner surface of the housing is coated with a continuous conductive coating.

[0013] Preferably, the ignition structure includes a protective shell, a conduit, a cable, an electrical connector, and a coil ignition head. A conduit is provided on one side of the protective shell, one end of which is connected to the interior of the ignition coil body. The cable and electrical connector are provided inside the protective shell, and the other end of the conduit passes through the interior of the protective shell and is connected to the cable. One end of the cable is electrically connected to the electrical connector. A coil ignition head is provided on the other side of the protective shell, and the electrical connector is electrically connected to the coil ignition head.

[0014] Preferably, the coil ignition head has an insulating tongue inside.

[0015] Preferably, the conductive metal fins are evenly distributed along the length of the inner shielding shell, and the conductive metal fins are arranged in a ring with equal spacing.

[0016] The beneficial effects of this utility model are:

[0017] This invention improves the safety performance of the ignition coil body through the combined use of a protective structure, an ignition structure, an outer shielding shell, an inner shielding shell, and conductive metal fins. The protective structure enriches the existing structure of the ignition coil body. The outer and inner shielding shells form a protective barrier, preventing electrostatic discharge from reaching the easily triggered points inside the ignition coil body. Furthermore, the conductive metal fins, located on the inner wall of the inner shielding shell and in contact with the outer shell of the ignition coil, can quickly conduct away the electrostatic charge accumulated on the outer shell of the ignition coil, preventing the voltage from rising to a level sufficient to cause a dangerous discharge. Attached Figure Description

[0018] Figure 1 This is a front view of the safety ignition coil of this utility model;

[0019] Figure 2 This is a schematic diagram of the protective structure of the safety ignition coil of this utility model;

[0020] Figure 3 This is a schematic diagram of the ignition coil body of the safety ignition coil of this utility model;

[0021] Figure 4 This is a schematic diagram of the internal ignition structure of the safety ignition coil of this utility model;

[0022] In the diagram: 1-Ignition coil body, 101-Iron core, 102-Secondary coil, 103-Primary coil, 104-Outer shell, 105-High voltage terminal, 2-Protective structure, 201-Outer shielding shell, 202-Inner shielding shell, 203-Conductive metal fins, 3-Ignition structure, 301-Protective shell, 302-Conduit, 303-Cable, 304-Electrical connector, 305-Coil ignition head, 3051-Insulating tongue. Detailed Implementation

[0023] See Figures 1 to 4 This utility model discloses a safety ignition coil, comprising an ignition coil body 1, a protective structure 2, an ignition structure 3, an outer shielding shell 201, an inner shielding shell 202, and conductive metal fins 203. The protective structure 2 is sleeved on the outside of the ignition coil body 1, and one end of the ignition coil body 1 is connected to the ignition structure 3. The protective structure 2 includes an outer shielding shell 201, an inner shielding shell 202, and conductive metal fins 203. The outer shielding shell 201 is located outside the inner shielding shell 202, and the conductive metal fins 203 are located on the inner wall of the inner shielding shell 202 and contact the outer wall of the ignition coil body 1.

[0024] The outer shield 201 and the inner shield 202 can form a protective barrier to prevent electrostatic discharge from reaching the easily triggered point inside the ignition coil body 1. Furthermore, by providing conductive metal fins 203, which are located on the inner wall of the inner shield 202 and in contact with the ignition coil housing, the conductive metal fins 203 can directly and quickly conduct away the electrostatic charge accumulated on the ignition coil housing, preventing the voltage from rising to a level sufficient to cause a dangerous discharge.

[0025] See Figure 3 The ignition coil body 1 is composed of an iron core 101, a secondary coil 102, a primary coil 103, a housing 104, and a high-voltage terminal 105. The secondary coil 102, the primary coil 103, and the housing 104 are sequentially fitted on the outside of the iron core 101. The high-voltage terminal 105 is located at one end of the iron core 101.

[0026] See Figure 3 The inner surface of the outer shell 104 is coated with a continuous conductive coating. The conductive coating can shield the internal electric field, prevent the electrostatic field generated inside from coupling to the outside, and also discharge the charge accumulated inside.

[0027] See Figure 4The ignition structure 3 includes a protective shell 301, a conduit 302, a cable 303, an electrical connector 304, and a coil ignition head 305. The conduit 302 is located on one side of the protective shell 301, with one end connected to the interior of the ignition coil body 1. The cable 303 and electrical connector 304 are located inside the protective shell 301. The other end of the conduit 302 penetrates the interior of the protective shell 301 and connects to the cable 303. One end of the cable 303 is electrically connected to the electrical connector 304. A coil ignition head is located on the other side of the protective shell 301. The head 305, the electrical connector 304 is electrically connected to the coil ignition head 305. When the power supply is connected to the coil ignition head 305, the current is transmitted to the electrical connector 304, so that the electrical connector 304 transmits the current through the cable 303 to the conduit 302, and from the conduit 302 to the primary coil 103 in the ignition coil body 1 to supply power. After the primary coil 103 generates a magnetic field and is de-energized, the electromagnetic field in the primary coil 103 decays rapidly, and a high voltage is induced in the secondary coil 102, which is conducted to the spark plug connected to the ignition coil through the high voltage terminal 105.

[0028] See Figure 1 The coil ignition head 305 has an insulating tongue 3051 inside. The insulating tongue 3051 can increase the creepage distance from the outside to the metal terminal inside the connector and prevent foreign objects from directly contacting the terminal.

[0029] See Figure 2 The conductive metal fins 203 are uniformly distributed along the length of the inner shielding shell 202, and the conductive metal fins 203 are arranged in a ring with equal spacing, which can conduct electricity uniformly.

[0030] The working process of this utility model:

[0031] During operation, when the power supply is connected to the coil ignition head 305, the current is transmitted to the electrical connector 304. The electrical connector 304 then transmits the current through the cable 303 to the conduit 302, and from the conduit 302 to the primary coil 103 inside the ignition coil body 1 for power supply. After the primary coil 103 generates a magnetic field and is de-energized, the electromagnetic field in the primary coil 103 rapidly decays, and a high voltage is induced in the secondary coil 102, which is conducted to the spark plug connected to the ignition coil through the high voltage terminal 105.

[0032] Meanwhile, the outer shield 201 and the inner shield 202 can form a protective barrier, thereby preventing electrostatic discharge from reaching the easily triggered point inside the ignition coil body 1. Furthermore, by setting the conductive metal fins 203, since the conductive metal fins 203 are located on the inner wall of the inner shield 202 and are in contact with the outer shell of the ignition coil, the conductive metal fins 203 can directly and quickly conduct away the electrostatic charge accumulated on the outer shell of the ignition coil, preventing the voltage from rising to a level sufficient to cause a dangerous discharge.

[0033] The control method of this utility model is to control the device by manually starting and stopping the switch. The wiring diagram of the power element and the supply of power are common knowledge in the field. Since this utility model is mainly used to protect mechanical devices, the control method and wiring layout will not be explained in detail.

[0034] The above embodiments are illustrative of the present invention and are not intended to limit the present invention. Any simple modifications to the present invention are within the protection scope of the present invention.

Claims

1. A safety-type ignition coil, characterized in that: The device includes an ignition coil body (1), a protective structure (2), an ignition structure (3), an outer shield (201), an inner shield (202), and a conductive metal wing (203). The protective structure (2) is fitted around the ignition coil body (1), and one end of the ignition coil body (1) is connected to the ignition structure (3). The protective structure (2) includes an outer shield (201), an inner shield (202), and a conductive metal wing (203). The outer shield (201) is located outside the inner shield (202), and the conductive metal wing (203) is located on the inner wall of the inner shield (202) and contacts the outer wall of the ignition coil body (1).

2. The safety ignition coil as described in claim 1, characterized in that: The ignition coil body (1) is composed of an iron core (101), a secondary coil (102), a primary coil (103), a shell (104), and a high-voltage terminal (105). The secondary coil (102), the primary coil (103), and the shell (104) are sequentially fitted on the outside of the iron core (101). The high-voltage terminal (105) is located at one end of the iron core (101).

3. The safety ignition coil as described in claim 2, characterized in that: The inner surface of the outer casing (104) is coated with a continuous conductive coating.

4. The safety ignition coil as described in claim 1, characterized in that: The ignition structure (3) includes a protective shell (301), a conduit (302), a cable (303), an electrical connector (304), and a coil ignition head (305). A conduit (302) is provided on one side of the protective shell (301). One end of the conduit (302) is connected to the inside of the ignition coil body (1). The inside of the protective shell (301) is provided with a cable (303) and an electrical connector (304). The other end of the conduit (302) passes through the inside of the protective shell (301) and is connected to the cable (303). One end of the cable (303) is electrically connected to the electrical connector (304). A coil ignition head (305) is provided on the other side of the protective shell (301). The electrical connector (304) is electrically connected to the coil ignition head (305).

5. The safety ignition coil as described in claim 4, characterized in that: The coil ignition head (305) is provided with an insulating tongue (3051) inside.

6. The safety ignition coil as described in claim 1, characterized in that: The conductive metal fins (203) are evenly distributed along the length of the inner shielding shell (202), and the conductive metal fins (203) are arranged in a ring with equal spacing.

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