JPH0456485B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to the structure and manufacture of a delay line used for circuit timing adjustment and phase correction in electronic equipment that handles digital signals, such as electronic computers and OA equipment. It is about the method.

[Conventional technology]

A lumped constant delay line circuit is constructed using a coil 10 and a capacitor 20, for example, as shown in FIG.

FIG. 10 shows a specific example of the structure, and shows the state before the main body is encapsulated in resin.
A plurality of capacitors 20 are soldered to printed wiring provided on the lower surface of the printed circuit board 30.
A synthetic resin sheet 40 having a plurality of holes 42 is adhered to the upper surface of the printed circuit board 30, and a plurality of coils 10 wound around a core 50 made of a magnetic material such as ferrite are positioned by the holes 42. It has been installed. After the lead 12 of the coil 10a at the input end, the lead 14 of the coil 10b at the output end, and the tap 16 of each coil 10 are soldered and connected to the printed wiring on the printed circuit board 30, they are further connected to the terminals 62, respectively. There is.

Conventionally, such a delay line was assembled as follows.

First, as shown in FIG. 11, the coil 10 is continuously wound around a plurality of cores 50 while the tap 16 is exposed, the tap 16 is twisted, and preliminary solder is applied to the tip. On the other hand, the capacitor 20 is soldered to the lower surface of the printed circuit board 30, and the sheet 40 in which a plurality of holes 42 are formed in correspondence with the cores 50 is adhered to the upper surface of the printed circuit board 30. Next, the above-mentioned coil 10 and a series of cores 50 connected by the wire rod,
It is fitted into the hole 42 and adhered and fixed to the upper surface of the printed circuit board 30. Then, the leads 12, 14 of the coil 10 and each tap 16 are led to a predetermined connection part of the printed wiring and soldered.

Next, the printed circuit board 30 to which the coil 10 and capacitor 20 are attached is placed between lead frames in which a large number of terminals 62 are arranged in two rows, and printed wiring is formed by soldering the leads 12, 14 and the taps 16. Connect each connection to each terminal 6
Solder to 2. Thereafter, by cutting off unnecessary portions of the lead frame, a delay line as shown in FIG. 10 was obtained.

[Problem that the invention seeks to solve]

Conventionally, a coil was wound around the core 50 before it was attached to the printed circuit board 30, so a coil chain in which a plurality of cores 50 were connected with coil wire as shown in FIG. 11 was formed in advance. I end up. In this coil series, the cores 50 are connected by coil wires and have elongated taps 16, so it is easy to hold each core 50 and arrange it accurately on a printed circuit board, and for printing wiring. It has been extremely difficult to automate the process of soldering the taps 16. In the past, this troublesome work had to be done manually, leading to a drop in productivity. Moreover, the conventional manufacturing method not only requires complicated steps such as connecting the printed circuit board and the lead frame, but also has many problems such as the need for a sheet 40 for positioning the core.

[Purpose of the invention]

A first object of the present invention is to eliminate the troublesome process of connecting a printed circuit board and a lead frame without using a conventional printed circuit board.

A second object of the present invention is to fix a plurality of cores to a synthetic resin substrate on which terminals are implanted, and then wind coils around these cores, and the taps taken out from each coil are also used for coil winding. It is an object of the present invention to provide a delay line and a manufacturing method thereof, which can easily automate assembly and improve productivity by winding the wire around each terminal during the process.

[Means for solving problems]

The present invention provides a plurality of terminals having upwardly protruding parts on a synthetic resin substrate by insert molding, fixes a plurality of cores on this substrate, and connects each tap pulled out in the middle of winding a coil to a different terminal. It is characterized by a delay line structure in which a coil is continuously wound around each core.

Further, in the present invention, a lead frame having a plurality of mutually connected terminals is insert-molded on a synthetic resin substrate, a plurality of cores are fixed on this substrate, and then the protruding portions provided on these terminals upward of the substrate are The method for producing a delay line is characterized by continuously winding a coil around a plurality of cores while wrapping a tap, and by cutting out an unnecessary portion of a lead frame and separating it into a plurality of terminals.

〔Example〕

1 to 8 relate to one embodiment of the present invention. Note that parts corresponding to those shown in FIGS. 9 to 11 are designated by the same reference numerals in these figures.

FIG. 1 is a perspective view showing a delay line in the middle of manufacturing, and FIG. 2 is a front sectional view of a board 70 with a capacitor attached thereto.

A substrate 70 made of synthetic resin is insert-molded into a lead frame 60 having a plurality of terminals 62 connected by a connecting portion 66. Each terminal 62 protrudes from two side surfaces of the board 70, and a portion of each terminal 62 fits into a recess 72 provided on the bottom surface of the board 70.
exposed inside. A protrusion 64 extending upward from the upper surface of the substrate 70 is formed near the base of each terminal 62 . Further, a chip-type capacitor 20 is installed in the recess 72, and its electrodes are soldered to the terminals 62. A core 50 is provided on the upper surface of the substrate 70.
A recess 74 having a slightly larger diameter is formed, and each core 50 is fixed by inserting its lower part into this recess 74. The tap 16 of the coil wire is taken out during the winding of the coil 10 around the core 50, and after the tap 16 is wound several times around the protrusion 64 of the terminal 62, it is wound around the core 50 again. That is, the coil wire is continuously wound around a plurality of cores 50 one after another, with the tap 16 being wound around the terminal 62 during the winding around the core 50. The lead at the input end and the lead at the output end are also terminals 62.
After wrapping it around, it is soldered.

The main body of the delay line in the state shown in FIG. 1 is then sealed in resin, except for the terminals 62 and the connecting portions 66, and unnecessary portions of the lead frame 60 are removed to complete the delay line.

That is, the delay line of the present invention includes a synthetic resin substrate 70 having a plurality of recesses 72 formed on one main surface, a plurality of cores 50 fixed to the other main surface of the substrate 70, and two opposing sides of the substrate 70. A plurality of terminals 62 for external connection having a protruding part 64 protruding from the side surface and protruding toward the other main surface side and partially exposed in the recess 72, and a plurality of terminals 62 for external connection that are installed in the recess 72 and have a protrusion 64 protruding toward the other main surface side. A capacitor 20 connected to a terminal 62 exposed to It is characterized by a structure in which the coil 10 is wound around the coil 10.

Next, an example of a method for manufacturing this delay line will be explained with reference to the drawings. First, as shown in Figure 3,
A synthetic resin substrate 70 is insert-molded into a lead frame 60 formed by punching a conductive plate into a predetermined pattern. At this time, as shown in FIGS. 4 and 5, a recess 74 and a recess 72 separated by a partition wall 76 are formed on the upper and lower surfaces of the substrate 70, and the terminal 62 of the lead frame 60 is placed in the recess. 7
2 so that it is exposed. Next, as is clear from FIGS. 2 and 4, the protrusion 64 is attached to the substrate 7.
A plurality of capacitors 20 are formed in the recess 72 on the bottom surface of the substrate 70.
are attached so as to be separated from each other by a partition wall 76.
Then, both electrodes 22 of the capacitor are soldered to each terminal 62, and the core 50 is fixed in the recess 74 of the substrate 70 by adhesive or other means.

Thereafter, as shown in FIG. 6, the coil wire is wound around the protrusion 64 by rotating a cylinder 100 provided in an automatic winding machine and capable of feeding out the wire around the protrusion 64 of the terminal. Note that the cylindrical body 100 can not only rotate around the protrusion 64 etc.
It is movable vertically and horizontally, while the substrate 70 is movable in a direction parallel to the upper surface.

The end 18 of the wire at the beginning of winding is clamped to a wire holding part 110 consisting of, for example, an openable/closable rod 112 and a sleeve 114, and the protruding part 6
When the wire rod is wound around 4 and cannot be removed, it is cut at the base of the protrusion 64. The end 18 of this wire that is no longer needed is attached to the rod 1 as shown in FIG.
12 is removed from the holding part 110 by protruding it from the sleeve 114.

Next, as shown in FIG. 7, the substrate 70 or the cylindrical body 10 is
0 to change the relative position between the substrate 70 and the cylindrical body 100, and then move the cylindrical body 100 to the first core 50.
The coil 10 is wound by rotating it around the . Then, in the middle of winding this coil 10, take out the tap 16, return it to the positional relationship as shown in FIG.
A wire is wound around the protrusion 64 of the second terminal. Thereafter, the coil 10 is again wound around the first core 50 in the state shown in FIG. 7 again. Next, the cylindrical body 100 is moved close to the second core 50 and the coil 10 is wound thereon, and the movement of the substrate 70 and the rotation of the cylindrical body 100 are repeated as before, so that the taps 16 are brought out one after another and the protrusion is The coil 10 is continuously wound around the plurality of cores 50 while winding the wire around the core 64.

As shown in FIG. 8, after finishing winding around the protrusion 64 of the last terminal, the wire 19 at the end of the winding is placed in the holding part 110 in preparation for the next delay line winding operation.
The protrusion 64 is then clamped at the base and cut at the base of the protrusion 64. When each protrusion 64 and the wire are soldered, a delay line as shown in FIG. 1 is completed. After that, the main body part except the terminal 62 and the connecting part 66 is sealed in synthetic resin, and the lead frame 6
At the same time, the terminals 62 are separated by cutting out unnecessary parts such as the connecting portion 66 (FIG. 3) of 0, and at the same time, these terminals 62 are bent downward to finally complete the delay line.

Note that the cutting of the connecting portion 66 does not necessarily have to be the final step, but may be performed during an intermediate step.

As described above, the present invention also includes the first step of insert-molding the lead frame 60 having a plurality of terminals 62 connected to each other on the synthetic resin substrate 70, and the step of insert-molding the lead frame 60 having a plurality of terminals 62 connected to each other on the synthetic resin substrate 70, and bending a part of each terminal 62 to form the substrate 70. The second one forming the protrusion 64 toward the main surface side.
a third step of fixing a plurality of cores 50 on this main surface of the substrate 70; rotating a cylinder 100 capable of feeding out the wire around the core 50 to wind the coil 10 around the core 50; After the cylindrical body 100 is rotated around the protruding part 64 during coil winding to wrap the tap 16 of the coil 10 around the protruding part 64, the cylindrical body 100 is rotated again around the core 50 to wrap around the core 50. It has a fourth step of winding the coil 10, and a fifth step of cutting off unnecessary parts of the lead frame 60 and separating it into a plurality of terminals 62,
The method of manufacturing a delay line is characterized in that the fourth step is performed successively on different cores 50.

〔Effect of the invention〕

Since the bobbin is fixed to the board and then the winding is applied,
It is possible to eliminate the troublesome work of attaching a coil series in which a plurality of bobbins are connected by coils to a board as in the conventional method. Furthermore, since the board is directly insert-molded onto the lead frame without using a printed circuit board, there is no need for a process for connecting the printed board and the lead frame.

That is, according to the present invention, a series of manufacturing processes such as joining the lead frame and the board, attaching the bobbin to the board, coil winding, and connecting the taps to the terminals can be performed with high precision using automatic machines. It can be carried out well and quickly, and a significant improvement in productivity can be achieved.

[Brief explanation of the drawing]

Figures 1 to 8 relate to one embodiment of the present invention, with Figure 1 being a perspective view showing a delay line in the middle of manufacturing, and Figure 2 showing a position along line A-A in Figure 4. 3 to 8 are cross-sectional front sectional views of the board after capacitors are installed, and are for explaining the manufacturing process of the delay line, and FIGS. 3 and 4 are partially cutaway bottom views, Figure 5 is a partially cutaway plan view;
6 and 7 are explanatory diagrams of the winding method, FIG. 8 is a plan view, FIG. 9 is a diagram showing an example of the circuit configuration of a delay line, and FIG. 10 is a diagram showing the configuration of a conventional delay line. FIG. 11 is a partially cutaway perspective view showing a conventional example of a series of bobbins around which coils are wound. 10... Coil, 16... Tap, 50... Core, 60... Lead frame, 62... Terminal, 6
4... Protrusion, 70... Substrate.

Claims (1)

[Claims] 1. A synthetic resin substrate having a plurality of recesses formed on one main surface, a plurality of cores fixed to the other main surface of the substrate, and a plurality of cores protruding from two opposing sides of the substrate and a plurality of external connection terminals having protrusions protruding toward the main surface and partially exposed within the recess;
A capacitor is installed in the recess and has an electrode connected to a terminal exposed in the recess, and the tap pulled out during winding of the coil around each core is wound around the protrusion of a different terminal, and each core is A daylay line characterized by having a coil wound continuously around the coil. 2. A first step of insert molding a lead frame having a plurality of interconnected terminals on a synthetic resin substrate, and a second step of bending a portion of each terminal to form a protrusion toward one main surface of the substrate. a third step of fixing a plurality of cores on the main surface of the substrate; and a third step of rotating a cylinder capable of feeding out the wire material around the core to wind the coil around the core, in the middle of the coil winding. a fourth step of rotating the cylindrical body around the protrusion to wrap the tap of the coil around the protrusion, and then rotating the cylindrical body around the core again to wind the coil around the core; A method for manufacturing a delay line, comprising: a fifth step of cutting out an unnecessary portion of the lead frame and separating it into a plurality of terminals; and performing the fourth step successively on different cores.