JPH0337222Y2 - - Google Patents

Description

[Detailed description of the invention] The structure of the terminal and the structure of the coil end portion of the present invention, in which the terminal of a secondary coil wound around a bobbin having one or more winding grooves is wound around a terminal fixed to the bobbin. This invention relates to an improved simultaneous ignition coil for internal combustion engines.

The conventional well-known configuration has a basic configuration in which a secondary coil bobbin and a pair of terminals for connecting a high-voltage cord are individually assembled into an ignition coil case, and each terminal of the secondary coil and the above-mentioned terminal are connected with lead wires. It was hot.

Therefore, when winding a secondary coil onto a secondary coil bobbin, both ends of the winding start and winding end must be held on the bobbin.Furthermore, not only a special lead wire is required, but also a lead wire. There was a drawback that the connection between the end portion of the secondary coil and the terminal was complicated.

In order to solve the above-mentioned drawbacks, the present invention provides a pair of terminals for high-voltage cord connection with a protrusion that can directly wrap and fix the winding start end and end winding end of the secondary coil. A holding structure is provided on the secondary coil bobbin to bridge the secondary coil from the winding end side to the winding start side so that the terminals are located on the same side of the secondary coil bobbin, and the pair of terminals are further mounted on the secondary coil bobbin. ,
The secondary coil bobbin is installed at a position on the winding start side that is axially shifted from the position of the winding groove, so that the winding of the secondary coil in the winding groove and the winding on the terminal of the two terminal parts are mutually connected. By preventing interference, the number of parts can be reduced, and the aim is to be able to fully automate everything from the winding and fixing of the coil winding start end to the terminal to the winding and fixing of the coil winding end end to the terminal. do.

The present invention will be described below with reference to embodiments shown in the drawings. As shown in FIG. 1 and the secondary coil diagram, a simultaneous ignition coil in which a plurality of high voltage cords 7 are attached in the same direction as the axial direction of the core 8 has a winding groove 1a divided into a plurality of parts in the axial direction of the core 8. On the winding start side of the secondary coil bobbin 1, there are a terminal 13A for fixing the coil winding start and a terminal 1 for fixing the coil winding end.
3B, and these terminals 13A, 13B
is the nail-shaped part 13C connected to the core wire 6 of the high-voltage cord 7
and protrusions 13a, 13b that connect the terminal parts 4a, 4b of the secondary coil 4 are integrated. Also, 2
The secondary coil bobbin 1 has a holding structure 2 that can bridge the coil winding end portion 4b from the winding end side of the secondary coil 4 to the winding start side. This holding structure 2 includes each winding groove 1 of the secondary coil bobbin 1.
It consists of a concave portion coaxially formed on the outer periphery of each flange portion 1b forming a.

In addition, a primary coil bobbin 10 is provided on the outer periphery of the core 8.
A primary coil 11 is wound around the outer periphery of the bobbin 10, and a secondary coil bobbin 1 is fitted onto the outer periphery of the primary coil bobbin 10.

Further, each terminal 13A, 13B is fixed to two protrusions 1c, 1d provided on the end surface of the secondary coil bobbin 1 so as to protrude in the radial direction. Each of the coils 4 and 11, each of the bobbins 1 and 10, a portion of the terminals 13A and 13B, and a portion of the core 8 are housed in a pot-shaped resin case 9 and sealed by casting an insulating resin 12. .

Further, on the open end side of the case 9, there are two radial bulges 9a, 9b that are slightly larger than the two protrusions 1c, 1d of the secondary coil bobbin 1, in accordance with the shapes of the two protrusions 1c, 1d. The protrusions 1c, 1d and a portion of the terminals 13A, 13B are housed in the protrusions 9a, 9b. Furthermore, cylindrical portions 9c are formed that extend in the axial direction from the respective bulging portions 9a and 9b, and each high voltage cord 7 is inserted into each of the cylindrical portions 9c. Between the protruding parts 9a and 9b, the nail-shaped parts 1 of the terminals 13A and 13B are provided.
Holes 9d each having a size that allows 3C to pass through are formed.

A winding start terminal 1 is fixed to the secondary coil bobbin 1 on the axial coil winding start side of the core 8.
3A is provided with a protrusion 13a, and the protrusion 13a is provided with a protrusion 13a.
The winding start end portion 4a of the next coil 4 is wound and fixed. Next, the secondary coil 4 is wound around the secondary coil bobbin 1 having the winding groove 1a divided into a plurality of parts in the axial direction of the core 8, and then the winding end of the secondary coil 4 is
It bridges the protrusion 13b of the winding end terminal 13B fixed to the secondary coil bobbin 1 on the axial coil winding start side of the core 8, and the winding end end 4b of the secondary coil 4 is wound and fixed around the protrusion 13b. This simultaneously achieves holding of both end portions of the secondary coil 4 and electrical connection between these end portions and each terminal 13A, 13B.

Here, the position of each terminal 13A, 13B is shifted axially outward from each groove 1a of secondary bobbin 1, and the winding in the winding groove 1a of secondary coil 4 and the terminal of secondary coil 4 Each terminal 13
Since the windings on terminals 13A and 13B do not interfere with each other, the terminals 13A and 13B are connected before winding the secondary coil 4.
13B to the secondary bobbin 1, everything from winding and fixing the coil winding start end 4a to the protrusion 13a of the terminal 13A to winding and fixing the coil winding end end 4b to the protrusion 13b of the terminal 13B. There is an effect that can be automated.

Note that the holding structure 2 is not limited to a recess, but may also include convex portions that are alternately provided one by one for each collar portion 1b at intervals that allow the end portion 4b of the coil winding to be held. You can.

As described above, in the present invention, two winding grooves for winding the secondary coil and a holding structure section that bridges the end of the winding of the secondary coil from the winding end side of the secondary coil to the winding start side of the secondary coil are provided. Equipped with the following coil bobbin,
This secondary coil bobbin supports a pair of terminals each having a protrusion for winding and fixing the winding start and end portions of the secondary coil at a position on the secondary coil winding start side that is axially offset from the position of the winding groove. Since the protrusion is provided to protrude in the radial direction, it is possible to prevent the winding of the secondary coil into the winding groove and the winding of the terminal of the secondary coil from interfering with each other. It is possible to fully automate the process from winding and fixing the terminal part to the terminal to winding and fixing the end part to the terminal at the end of coil winding using a winding machine. Since it is only necessary to wind the winding start and winding ends of the secondary coil around the projections of the pair of supported terminals, the structure is simple and the number of parts can be reduced, which is an excellent effect.

[Brief explanation of drawings]

1 and 2 are a partial vertical sectional view and a front view showing one embodiment of the coil of the present invention. 1... Secondary coil bobbin, 1a... Winding groove, 2...
...Holding structure part, 4...Secondary coil, 4a...Secondary coil winding start terminal part, 4b...Secondary coil winding end part, 7...High voltage cord, 13A, 13B...
Terminal, 13a, 13b... protrusion.

Claims (1)

[Claims for Utility Model Registration] A first high-voltage cord connection terminal having a protrusion for wrapping and fixing the winding start end of the secondary coil; and a protrusion for wrapping and fixing the winding end of the secondary coil. a second high-voltage cord connection terminal having a second high-voltage cord connection terminal; a holding structure that bridges the winding groove around which the secondary coil is wound and the end of the winding of the secondary coil from the winding end side of the secondary coil to the winding start side of the secondary coil; further comprising a secondary coil bobbin having a protrusion that supports the pair of terminals in the radial direction at a position on the secondary coil winding start side that is axially shifted from the position of the winding groove. A simultaneous ignition coil for an internal combustion engine, characterized in that it is provided protrudingly.