CN203277073U

CN203277073U - Ignition coil for internal combustion engine

Info

Publication number: CN203277073U
Application number: CN 201320204123
Authority: CN
Inventors: 川井一秀
Original assignee: Denso Corp
Current assignee: Denso Corp
Priority date: 2013-04-22
Filing date: 2013-04-22
Publication date: 2013-11-06
Anticipated expiration: 2023-04-22

Abstract

Provided is an ignition coil for an internal combustion engine. After a coil portion (1), a coil portion (2), a coil portion (3) and a secondary connector (6) are inserted into a containing space (41) in the direction shown by an arrow (A), the front end portion of the secondary connector (6) abuts against the bottom inner wall face (45) of a main barrel portion (42). If the coil portion (1), the coil portion (2), the coil portion (3) and the secondary connector (6) are further inserted in the inserting direction (A), the front end portion of the secondary connector (6) slides on the bottom inner wall face (45) in the direction shown by an arrow (B), and therefore the secondary connector (6) is embedded with a groove (51) of a high-voltage terminal (5). Due to the fact that the high-voltage terminal (5) is in contact with the secondary connector (6) in an embedded mode, the contact state of the high-voltage terminal (5) and the secondary connector (6) can be maintained whether a shell body (4) and insulating resin (7) are expanded or contracted, and poor breakover caused by the separation of the high-voltage terminal (5) and the secondary connector (6) can be avoided.

Description

Internal combustion engine ignition coil

Technical field

The utility model relates to the internal combustion engine ignition coil that generates the voltage that makes spark plug generation sparkover.

Background technology

Internal combustion engine ignition coil in the past constitutes, and open side assembling iron core, primary winding and secondary coil by from housing are connected in the on high-tension side secondary joint of secondary coil and the head butt of HV Terminal.

HV Terminal directly is fixed on housing, and the secondary joint is fixed on housing via insulating resin.Therefore, if there be the poor of coefficient of linear expansion in the material of housing and insulating resin, along with expansion or the contraction of housing and insulating resin, HV Terminal and secondary joint relatively move, and HV Terminal is separated with the secondary joint.And because HV Terminal and separating of secondary joint cause producing poor flow, the do as one likes loss of energy or micro discharge cause producing the problem of radio noise.

The utility model content

The utility model is point in view of the above problems, and its purpose is, prevents the generation of the poor flow that caused by HV Terminal and separating of secondary joint.

The internal combustion engine ignition coil of the first mode of the present utility model is characterised in that to possess: housing (4), resin; Primary winding (1) and secondary coil (2) are contained in housing; HV Terminal (5) is fixed on housing, is electrically connected to spark plug; Secondary joint (6), an end engages with secondary coil, and the other end contacts with HV Terminal; Insulating resin (7) is around covering primary winding, secondary coil and secondary joint; HV Terminal contacts with chimerism with the secondary joint.

Thus, no matter expansion or the contraction of housing and insulating resin, the contact condition of HV Terminal and secondary joint all is maintained, and can prevent the generation of the poor flow that caused by HV Terminal and separating of secondary joint.

In addition, the internal combustion engine ignition coil of the second mode of the present utility model is characterised in that, HV Terminal is formed with groove at peripheral part, and the secondary joint possesses the insertion sheet that inserts above-mentioned groove.

In addition, the internal combustion engine ignition coil of Third Way of the present utility model is characterised in that, flute profile becomes ring-type, inserts sheet and is formed with two.

Have, the Reference numeral in the parantheses of this hurdle and claim described each unit represents the corresponding relation with the described concrete unit of execution mode described later again.

Description of drawings

Fig. 1 means the figure of the structure of the ignition coil in an execution mode of the present utility model.

Fig. 2 means the figure of the state in the assembling process of ignition coil of Fig. 1.

Fig. 3 means the stereogram of the major part of the state in the assembling process of ignition coil of Fig. 1.

Fig. 4 means the stereogram of the major part of the state that begins further to assemble from the state of Fig. 3.

Embodiment

The first execution mode of the present utility model is described.As shown in Figure 1, dispose the secondary coil cylindraceous 2 of coiling secondary copper cash at the outer circumferential side of the primary winding cylindraceous 1 of the copper cash of reeling, dispose in interior all sides of primary winding 1 iron core 3 that is consisted of by magnetic material.Hereinafter, primary winding 1, secondary coil 2 and iron core 3 are called coil portion 1～3.

Then, when switching on to primary winding 1, form the magnetic field by iron core 3.Next, when the energising of cutting off to primary winding 1, produce high-tension induced electromotive force due to electromagnetic induction phenomenon in secondary coil 2.

Resinous housing 4 possesses: the main body cylinder section 42 of bottom tube-like is arranged, be formed with the spatial accommodation 41 that holds coil portion 1～3; And high-pressure tower 44 cylindraceous, outstanding and be formed with through hole 43 laterally from the bottom of main body cylinder section 42.

Insert and be fixed with the columned HV Terminal 5 of conducting metal system in through hole 43.When ignition coil being loaded into internal combustion engine (not shown), this HV Terminal 5 is electrically connected to spark plug (not shown) via spring terminal (not shown).

One end of the secondary joint 6 that is formed by the sheet material of conducting metal system engages with the high-pressure side of secondary coil 2.In addition, the other end of secondary joint 6 contacts (details is waited until aftermentioned) with HV Terminal 5 with chimerism.

Coil portion 1～3 and secondary joint 6 are contained in spatial accommodation 41, after secondary joint 6 and HV Terminal 5 is chimeric, thermosetting and the insulating resin 7 that is rich in electrical insulating property are filled to spatial accommodation 41.In other words, by around insulating resin 7 covering coil portions 1～3 and secondary joint 6.

As Fig. 2～shown in Figure 4, be formed with the groove 51 of ring-type at the peripheral part of HV Terminal 5.This groove 51 is positioned at the position near the bottom interior wall face 45 of main body cylinder section 42, and is positioned at spatial accommodation 41.

On the one distolateral bobbin that is fixed on secondary coil 2 of secondary joint 6.Be formed with the tabular insertion sheet 61 of two insertion grooves 51 in another distolateral (free end side) of secondary joint 6.Two insertion sheets 61 extend abreast, insert between sheet 61 at two to be formed with slit portion 62.In addition, inserting sheet 61 bends to circular-arc.

Next, the assemble method of the ignition coil of present embodiment described.At first, as shown in Figure 2, coil portion 1～3 and secondary joint 6 along direction shown in arrow A, are inserted into spatial accommodation 41 from the peristome of main body cylinder section 42.With the coil portion 1～3 of this moment and the direction of insertion of secondary joint 6 hereinafter referred to as direction of insertion A.

Then, with coil portion 1～3 and secondary joint 6 after direction of insertion A is inserted into spatial accommodation 41, as shown in Figure 2 and Figure 3, bottom interior wall face 45 butts of the leading section of the insertion sheet 61 of secondary joint 6 and main body cylinder section 42.

Then, if coil portion 1～3 and secondary joint 6 are further inserted along direction of insertion A, inserting sheet 61 slides along direction shown in arrow B on bottom interior wall face 45, as shown in Figure 4, insert sheet 61 and enter the groove 51 of HV Terminal 5, and then, insert sheet 61 and slide along direction shown in arrow B on the sliding surface 52 of HV Terminal 5, insert sheet 61 chimeric with groove 51.Under this chimerism, insert sheet 61 and be close to by sliding surface 52 and the flange part 53 of strain and HV Terminal 5.

Then, insulating resin 7 is filled to spatial accommodation 41 and it is solidified, complete the assembling of ignition coil.

In the present embodiment, HV Terminal 5 contacts with chimerism with secondary joint 6, so no matter expansion or contraction of housing 4 and insulating resin 7, HV Terminal 5 all is maintained with the contact condition of secondary joint 6, can prevent the generation of the poor flow that caused by HV Terminal 5 and separating of secondary joint 6.

Having, in the above-described embodiment, although be to consist of secondary joint 6 by sheet material, is not to be defined as sheet material again, can be for example to consist of secondary joint 6 with wire rod yet.

In addition, the utility model also not only is confined to above-mentioned execution mode, but can suitably change in the described scope of claim.

In addition, in the above-described embodiment, consist of the key element of execution mode, except thinking to express especially for necessary situation and being clearly that necessary situation etc., of course not one is decided to be necessary key element on principle.

In addition, in the above-described embodiment, in the situation that mention the numerical value of the number, numerical value, amount, scope etc. of the inscape of execution mode, except particularly expressing for necessary situation and the situation that is defined as clearly specific number on principle etc., be not limited to this and specifically count.

In addition, in the above-described embodiment, when the shape that mentions inscape etc., position relationship etc., except situation about expressing especially and situation that is defined as specific shape, position relationship etc. on principle etc., be not limited to this shape, position relationship etc.

Claims

1. internal combustion engine ignition coil is characterized in that possessing:

Resinous housing (4);

Primary winding (1) and secondary coil (2) are contained in above-mentioned housing;

HV Terminal (5) is fixed on above-mentioned housing, is electrically connected to spark plug;

Secondary joint (6), an end engages with above-mentioned secondary coil, and the other end contacts with above-mentioned HV Terminal; And

Insulating resin (7), cover above-mentioned primary winding, above-mentioned secondary coil and above-mentioned secondary joint around;

Above-mentioned HV Terminal contacts with chimerism with above-mentioned secondary joint.

2. internal combustion engine ignition coil as claimed in claim 1, is characterized in that,

Above-mentioned HV Terminal is formed with groove (51) at peripheral part,

Above-mentioned secondary joint possesses the insertion sheet (61) that inserts above-mentioned groove.

3. internal combustion engine ignition coil as claimed in claim 2, is characterized in that,

Above-mentioned flute profile becomes ring-type, and above-mentioned insertion sheet is formed with two.