JP3463057B2 - Iron core coil - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an iron core coil which constitutes a high pressure magnet generator of an engine ignition device.

[0002]

2. Description of the Related Art In an iron core coil which constitutes a high voltage magnet generator of an engine ignition device, a coil body having a primary coil and a secondary coil is mounted and attached to a coil mounting portion of a laminated iron core, and a permanent magnet is embedded and fixed. A high-voltage magnet generator is constructed in combination with the above flywheel and is fixed to the engine body by means such as screwing.

As described above, since the iron core coil is directly assembled and fixed to the engine body, intense vibration from the engine is directly transmitted, and this vibration loosens the assembling of the coil body to the laminated iron core. Therefore, the assembly of the coil body to the laminated iron core has been achieved extremely firmly and immovably.

If the assembly of the coil body to the laminated core is made strong and immovable, there is no room to assemble the coil body to the laminated core, so that the laminated core and the coil body are relatively early after use. There is a problem that rattling occurs, and this rattling increases at an accelerating rate as the engine is used.

Further, the earth of the coil body mounted on the laminated core is obtained by fixing the earth terminal of the coil body (earth terminal of the primary coil) to the laminated core by spot welding.
The need to install spot welding equipment complicates the worksite for assembling the iron core coil, and requires skill for spot welding, which often causes welding defects, and the heat of spot welding adversely affects the surrounding electrical components. There was an inconvenience that it might be given.

The technique disclosed in Japanese Utility Model Publication No. 57-574 as a typical conventional technique for eliminating the above-mentioned inconvenience is such that a mounting portion and a coil body are provided between the mounting portion and the coil body of the laminated iron core. In addition to being locked on both sides, a clasp that strongly presses the coil body against the mounting portion is forcibly mounted by exerting a strong pressing force between the mounting portion and the coil body.

In this prior art, a clasp that is elastically deformed and inserted between the mounting portion of the laminated core and the coil body is inserted into and removed from the mounting portion of the coil body in both the mounting portion and the coil body. Since it is locked in the direction, the assembling of the coil body with respect to the mounting portion is firmly and stably held, and the vibration transmitted from the engine body is absorbed by the elastic force, so that it is fine within the elastic deformation range of the stopper plate. Although rattling occurs between the mounting part and the coil body, assembly of the coil body to the mounting part does not result in inconveniently large rattling, and stable assembly of the coil body to the mounting part is safely maintained. To do.

[0008]

However, in the above-mentioned prior art, the assembling of the stopper plate with respect to the mounting portion is performed at a position where the tip of the rising piece is locked to the other end side hole surface of the locking hole of the mounting portion. Since there is no function to hold, the stopper plate can be displaced with respect to the mounting part within the range where the rising piece is fitted in the locking hole, and thus it is possible to prevent rattling of the coil body with respect to the laminated iron core. However, there is a problem that the assembly position of the coil body with respect to the laminated iron core may be displaced.

In the work of assembling the iron core coil,
Since it is necessary to separately handle the laminated iron core, the coil body, the clasp, and the three parts, the workability of assembling the iron core coil is poor, and therefore high work efficiency cannot be obtained for assembling the iron core coil. In addition, there was a problem that it required skilled skills.

Furthermore, since the grounding of the coil body mounted on the laminated iron core is obtained by spot welding as in the conventional case,
There is a problem that the inconvenience caused by using the spot welding technology cannot be eliminated at all.

Therefore, the present invention was devised in order to solve the above-mentioned problems in the prior art. Assembling a clasp for assembling and holding a coil body to a laminated iron core by using elasticity to the coil body. Is a technical issue to be made solid and integrated, and thus, the assembly of the coil body to the laminated iron core is stably maintained at a fixed position, the assembly operation of the iron core coil is facilitated, and the spot welding means is used. The purpose is to obtain the ground of the coil body without.

[0012]

Means for Solving the Problems The means of the present invention for solving the above technical problems has a laminated core provided with a locking hole on one side of a coil mounting portion and electrically connected to an engine body. A coil body having a primary coil and a secondary coil, and a mounting hole through which a mounting portion of the laminated iron core is inserted is formed in the center, and a curved elastic member that strongly elastically contacts the mounting hole surface of the coil body. Adjacent to the section, which has a main body plate with a locking projection projecting obliquely downward in the pressing direction, at the pressing section that strongly presses against the mounting section of the laminated iron core. The coil body is provided with a fixing piece that is fixedly connected to the ground terminal of the coil body through a curved portion that is curved and inverted at the upper end of the protruding main body plate, and at the lower end of the main body plate, the curved body is reversed and the coil is reversed. A tough conductive bullet with a locking piece that locks to the underside of the body It has a manufacturing of ground clasp,
With the position of the locking tab of the ground clasp and the locking hole of the laminated iron core inserted into the mounting part of the laminated iron core to the mounting limit, the tip of the locking protrusion of the ground clasp is It is set to a value that locks on the hole surface of the locking hole.

It is effective to form three pressing portions by providing two elastic portions on the main plate of the earth clasp, and to provide a locking projection on the central pressing portion. It is good to shape the locking projection into a tongue shape by half blanking,
Then, it is advantageous in terms of work to provide stoppers projecting on the upper edge of the upper end of the mounting hole of the coil body on both sides of the body plate of the grounding clasp protruding upward from the mounting hole of the coil body. It is preferable that the curved portion of gold be gently curved to such an extent that it can be easily curved and deformed.

Secure the earth clasp to the coil body by
This may be achieved by soldering the substrate, which is integrally fixed together with the primary coil and the secondary coil by the molding resin, to the ground solder round to which the ground terminal of the primary coil is connected. Is an iron core coil according to 2 or 3 or 4 or 5.

[0015]

The coil body is mounted and mounted on the mounting portion of the laminated core to a position where the upper end surface of the coil body is brought into contact with the beam portion which is continuously provided from the upper end of the mounting portion of the laminated iron core. Therefore, the coil body is attached to the mounting portion of the laminated iron core in a state in which it cannot be displaced upward.

Further, since the grounding clasp fixed to the coil body at the fixing portion has the tip of the locking projecting piece locked to the hole surface of the locking hole of the laminated iron core, it is pulled out from the mounting portion of the laminated iron core. Direction, that is, the coil body is assembled in a laminated iron core in a state where it cannot be displaced downward, and the locking piece is locked to the lower surface of the coil body, so that the coil body can be displaced downward with respect to the earth stopper. It is in a state where it cannot be done.

Further, the elastic portion formed on the body plate of the earth clasp strongly elastically contacts the coil body, and the pressing portion strongly presses the mounting portion of the laminated iron core, and the side where the earth clasp is located. The laminated core and the coil body are strongly pressed against each other on the side opposite to.

For this reason, the mounting assembly of the coil body to the laminated iron core up to the mounting limit, the engagement of the earthing clasp locking projection with respect to the laminated iron core locking hole, and the earthing clasp locking piece The coil body is locked to the lower surface of the coil body and the strong elasticity of the ground clasp located between the laminated iron core and the coil body causes the coil body to move to the fixed mounting limit position of the mounting portion of the laminated iron core in the pull-out direction. With respect to the vibrations that are held undisplaceable and transmitted, although the coil body is slightly displaced with respect to the laminated iron core by the elasticity of the earth stopper, it is absorbed within this minute displacement range. Does not deteriorate the assembling holding force of the coil body with respect to the laminated iron core.

Since the earth clasp is assembled to the coil body in a fixed posture with the fixing piece fixed to the coil body, at the time of assembling work of the iron core coil, a combination of the coil body and the earth clasp is required. Two parts, a laminated iron core, will be handled.

In this iron core coil assembling work, the mounting portion of the laminated iron core is provided with the locking hole in the mounting hole of the coil body to which the earth plate is fixed while the main body plate is positioned in the mounting hole. This is accomplished by inserting the side surface toward the earth stopper and inserting it from the magnetic pole surface side to the mounting limit, and locking the locking projection of the ground stopper in the locking hole of the mounting portion.

The insertion of the laminated iron core mounting portion into the mounting hole of the coil body is forcibly achieved against the elasticity of the main plate of the earth stopper, so that the mounting portion is inserted into the mounting hole. In this state, the body plate of the ground clasp elastically deforms and its length becomes slightly longer.Therefore, the locking piece of the ground clasp that was temporarily locked to the lower surface of the coil body is Since it will be slightly lifted from the lower surface of the body, after inserting and assembling the coil body into the mounting part,
The locking piece of the earth stopper is bent and firmly locked to the lower surface of the coil body to complete the assembly of the iron core coil.

In assembling the iron core coil, the locking projection of the ground clasp is projected on the pressing portion that strongly presses the mounting portion of the laminated core, so that the coil body is laminated in the mounting hole. Even if deformation that reduces the degree of protrusion occurs due to the action of a strong pressing force due to the forcible insertion of the iron core mounting portion, the engagement protrusion of the engagement protrusion is reliably achieved in the engagement hole. Will be.

Since the iron core coil thus assembled is attached to the engine body in a state where the laminated iron core portion is electrically connected to the engine body, the earth of the coil body is connected to the engine body from the earth stopper through the laminated iron core. The electrical connection, and therefore the attachment of the iron core coil to the engine body, provides the grounding of the coil body.

[0024]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. The coil body 1 is mounted on the coil case 4 made of a synthetic resin, which is an electrically insulating material, in which the primary coil 2 and the secondary coil 3 are installed, and the primary coil 2 and the secondary coil 3 installed in the coil case 4. Placed substrate 12, ignition circuit chip 16 (see FIG. 3) that is housed in coil case 4 together with primary coil 2 and secondary coil 3, and housed primary coil 2, secondary coil 3 and substrate 12 And a molding resin 18 (see FIGS. 1 and 2) for integrally molding and fixing the ignition circuit chip 16 in the coil case 4.

The coil case 4 has an inner cylinder 6 of a rectangular tube shape that forms a mounting hole 7, an outer cylinder 5 that forms a storage space between the inner cylinder 6 and the outer cylinder 5 and the inner cylinder 6. The bottom plate 8 is provided continuously between the lower ends, and the locking step portions 9 to which the locking pieces 26 of the earth stopper 19 are locked are formed on the left and right sides of the opening edge of the mounting hole 7 of the bottom plate 8. It is provided so as to be retracted by a height of 26, and a high-voltage terminal fitting 11 to which an output terminal of the secondary coil 3 is connected is provided at the bottom portion at the right end portion (upper end portion in FIG. 3) of the outer cylinder 5. The bottomed cylindrical plug terminal mounting cylinder piece 10 fixedly attached to is integrally provided in a state of protruding obliquely downward.

The primary coil 2 and the secondary coil 3 are internally fitted in the coil case 4 so as to be fitted onto the inner cylinder 6, and the secondary coil 3 wound around a coil bobbin is arranged outside the primary coil 2. .

The substrate 12 made of an insulating material placed on the primary coil 2 and the secondary coil 3 has a solder round 13 and an earth solder round 14 (see FIG. 3) on the upper surface thereof, and the solder round 13 has the primary shape. One terminal of the coil 2 and the secondary coil 3 and one terminal of the ignition circuit chip 16 are connected by soldering, and the coil body 1
The primary terminal fittings 15 that form the primary terminals are erected and fixed by soldering, and the ground solder round 14 is connected to the ground terminal of the primary coil 2 and the ground terminal of the ignition circuit chip 16 by soldering, The fixed piece 28 of the earth stopper 19 is fixed by soldering.

The ignition circuit chip 16 is arranged in a space outside the secondary coil 3 via a cushion 17 for stabilizing the posture when the coil body 1 is assembled, and the whole is covered with an insulating resin. There is.

To assemble the coil body 1, the coil case 4 is internally provided with a combination of the primary coil 2, the secondary coil 3, the substrate 12, the primary terminal fitting 15, the ignition circuit chip 16, the cushion 17, and the earth clasp 19. Since the output terminal of the secondary coil 3 is connected to the high-voltage terminal fitting 11 and fixed by molding with the filled mold resin 18, the earth clasp 19 is soldered to the substrate 12 and molded with the mold resin 18. By fixing, the coil body 1 can be assembled extremely firmly.

Ground stopper 19 (hereinafter, referred to in FIGS. 4 to 7)
(Refer to FIG. 3) is a tough steel plate formed by bending and half blanking, and the main body plate 20 that is the main part is formed by bending forming two elastic portions 21 and adjacent to the upper and lower sides of the elastic portions 21. Three pressing contact portions 22 are formed. In the central pressing contact portion 22, a tongue-shaped locking projection 23 that is surrounded by a notch 24 and projects obliquely downward is formed by half blanking. ing.

Two elastic portions 21 and three pressing portions 22 are attached to the main body plate 20 of the earth clasp 19 which is strongly pressed between the inner cylinder 6 of the coil body 1 and the mounting portion 30 of the laminated iron core 29. By forming, the main body plate 20 is strongly pressed against the mounting portion 30 by the three press contact portions 22 which are located at the upper and lower ends and the center thereof, whereby the main body plate 20 and the coil body 1 are laminated. The pressing force exerted between the coil body 1 and 29 acts substantially uniformly over the entire height range without being biased to stabilize the elastic assembling and holding of the coil body 1 with respect to the laminated iron core 29, and the earth clasp 19 The electrical connection to the laminated core 29 is ensured.

A curved portion 27 continuously provided on the upper end of the main body plate 20.
Is bent gently so that it can be easily bent (elastically deformed), that is, with a relatively large radius of curvature,
Due to the bending elastic deformation of the bending portion 27, a strong pressing force acting on the earth stopper 19 due to the mounting and assembling of the coil body 1 and the laminated iron core 29 is absorbed and the fixing of the fixing piece 28 to the substrate 12 is not deteriorated. Further, the locking piece 26 continuously provided at the lower end of the main body plate 20 is curved and inverted at a height not exceeding the depth of the locking step portion 9 of the coil body 1, so that the coil body 1 is attached to the laminated core 29. When mounted, the locking pieces 26 are prevented from protruding below the magnetic pole surface 32 of the mounting portion 30.

On both sides of the upper end of the main body plate 20 to which the curved portion 27 is continuously provided, stoppers 25 that abut the upper end surface of the inner cylinder 6 of the coil body 1 are integrally projected.
When the coil body 1 is attached to the laminated iron core 29, the earth clasp 19 is attached to the upper end surface of the inner cylinder 6 of the
The main body plate 20 is prevented from being pushed downward from the mounting hole 7 by the strong pulling force acting on.

Since the fixing piece 28 of the earth clasp 19 is fixed to the substrate 12 by soldering and fixed by the molding resin 18, the fixing to the substrate 12 is firmly achieved and held. By making the fixing piece 28 thinner to reduce its rigidity, the strength of the pressing force acting from the laminated iron core 29 on the earth clasp 19 to the fixing piece 28 portion is made weaker. There is.

The laminated core 29 is basically U-shaped (see FIG. 2).
Is provided, and a blind hole-shaped locking hole 31 is provided at the center of one side surface (front surface) of the mounting portion 30 to which the coil body 1 which is one foot portion is mounted. A beam portion 33, which is a continuous portion with the other foot portion (magnetic pole portion) and which sets a mounting limit of the coil body 1 to the laminated iron core 29, is provided with a part thereof protruding to the opposite side. A mounting hole 34 for mounting the laminated iron core 29 on the engine body in an electrically connected state is formed in the other foot portion and a portion projecting above the beam portion 33.

[0036]

Since the present invention has the above-mentioned structure, it has the following effects. Since the earth clasp is fixed and fixed to the coil body in a fixed posture prior to mounting the coil body to the laminated iron core, the coil fixed to the laminated iron core through this earth clasp is fixed. The body never undergoes displacement in the up-down direction (the mounting direction of the laminated core with respect to the mounting portion), so that the coil body can be stably maintained in a fixed position with respect to the laminated core. .

Assembling and holding of the coil body with respect to the laminated iron core by the earth stopper is achieved by pressing by the strong elastic force of the earth stopper, so that the elasticity of the earth stopper absorbs vibration from the engine body, Although a slight amount of looseness occurs due to the elastic deformation of the ground clasp between the core and the laminated iron core, this amount of looseness does not increase and the assembled holding of the coil body and the laminated iron core is elastically maintained. It is possible to safely maintain a fixed assembly of the coil body and the laminated iron core.

Assembling the iron core coil is a simple assembling work of the two parts of the combination of the coil body and the earth clasp and the laminated iron core, so that the operation is simple and easy. Assembling work of the iron core coil can be achieved with high work efficiency.

Since the grounding of the coil body is achieved by mounting and assembling the coil body on the laminated iron core, spot welding is not required at all for obtaining the ground, and various inconveniences due to the use of spot welding are caused. It is possible to eliminate all occurrences, and it is possible to obtain a high quality iron core coil.

Since the earth connection work after the assembling work of the coil body and the laminated iron core is unnecessary, it is possible to reduce the man-hours required for manufacturing the iron core coil and to eliminate the equipment, and thus the manufacturing efficiency of the iron core coil. The manufacturing cost of the manufacturing equipment can be significantly reduced.

[Brief description of drawings]

FIG. 1 is a longitudinal sectional view of a coil body showing an embodiment of the present invention,
The whole left side view in which a mounting part of a laminated core was partially broken.

2 is an overall front view of the embodiment shown in FIG. 1 with a coil body partially broken away.

3 is an overall plan view of the laminated iron core of the embodiment shown in FIG. 1 with the molding resin omitted and the beam portion thereof removed.

FIG. 4 is an overall vertical cross-sectional side view of a ground clasp used in the embodiment shown in FIG.

5 is an overall rear view of the ground clasp shown in FIG.

FIG. 6 is an overall front view of the ground clasp shown in FIG.

7 is an overall plan view of the ground clasp shown in FIG.

[Explanation of symbols]

1; coil body 2; Primary coil 3; Secondary coil 4; Coil case 5; Outer cylinder 6; Inner cylinder 7; Mounting hole 8; Bottom plate 9; Locking step 10; Tube piece with plug terminal 11; High-voltage terminal fittings 12; Substrate 13; Solder round 14; Earth solder round 15; Primary terminal fitting 16; Ignition circuit chip 17; Cushion 18; Mold resin 19; Earth clasp 20; Body plate 21; Elastic part 22; Pressing part 23; Locking protrusion 24; Notch 25; Stopper 26; Locking piece 27; curved section 28; Fixed piece 29; laminated iron core 30; Mounting part 31; Locking hole 32; Magnetic pole face 33; Beam section 34; Mounting hole

Claims (6)

(57) [Claims] 1. A locking hole (31) formed on one side of the coil mounting portion (30).
A laminated core (29) electrically connected to the engine body and mounted, a primary coil (2) and a secondary coil (3), and the mounting part (30) is inserted in the center. Adjacent to the coil body (1) penetrating through the hole (7) and the curved elastic part (21) that strongly elastically contacts the hole surface of the mounting hole (7),
In the pressing portion (22) that strongly presses against the (30), there is a main body plate (20) provided with a locking projection (22) projecting obliquely downward in the pressing direction. ) Of the coil body (1) through the bending portion (27) which is curved and inverted at the upper end protruding outside the mounting hole (7)
In addition, a fixing piece (28) fixed to the ground terminal of the coil body (1) is provided, and at the lower end of the main body plate (20),
The locking piece (2
Ground clasp (19) made of strong conductive elastic material with 6)
And the locking projection (23) and the locking hole (31).
Is the position where the coil body (1) is inserted into the mounting portion (30) up to the mounting limit, and the tip of the locking projection (23) is locked in the hole surface of the locking hole (31). Iron core coil set to the value to be set. 2. The body plate (20) is provided with two elastic portions (21) to form three pressing portions (22), and the central pressing portion (2) is formed.
The iron core coil according to claim 1, wherein the earth protrusion (19) is formed by providing a locking projection (23) on the (2). 3. The iron core coil according to claim 1, wherein the locking projection (23) is formed into a tongue piece by half blanking to form a ground clasp (19). 4. A stopper (25) for engaging with an upper opening edge of the mounting hole (7) is projected on both sides of a body plate (20) projecting upward from the mounting hole (7) of the coil body (1). Install and ground clasp (19)
The iron core coil according to claim 1, 2 or 3, which is configured. 5. The iron core coil according to claim 1, 2 or 3 or 4, wherein the curved portion (27) is gently curved to such a degree that it can be easily curved and deformed to form a ground clasp (19). 6. A substrate (1) for fixing the earth clasp (19) to the coil body (1) integrally with a primary coil (2) and a secondary coil (3) by a molding resin (18). 12)
The iron core coil according to claim 1, 2 or 3 or 4 or 5, which is achieved by soldering to a ground solder round (14) to which a ground terminal of the primary coil (2) is connected.