JPH044378Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention is a connector that is ideal for application to audio tape recorders, video tape recorders, television receivers, radio receivers, and various other electronic devices, and In particular, the present invention relates to a connector for connecting a plurality of wiring patterns of a flexible printed circuit board to a plurality of wiring patterns of a hard printed circuit board.

BACKGROUND TECHNOLOGY AND PROBLEMS Conventionally, when connecting a hard printed circuit board, such as a sheet metal board made by printing a plurality of wiring patterns on a board made of sheet metal via an insulating layer, and a flexible printed circuit board, the most common method is A typical method is the solder press method. In this method, a plurality of wiring patterns are formed on each of the sheet metal substrate and the flexible printed circuit board in a horizontal line at the same pitch, and a predetermined amount of solder is applied to each of the plurality of wiring patterns on the sheet metal substrate. Next, with multiple wiring patterns of the flexible printed circuit board overlaid on each of the solders, the flexible printed circuit board is heated and pressed onto the sheet metal board using a heating plate, and each solder is melted and both boards are heated. A plurality of wiring patterns are soldered together.

However, this solder press method requires a large number of steps, is very troublesome, and has low workability. Furthermore, once a flexible printed circuit board is soldered to a sheet metal board, it is almost impossible to remove the flexible printed circuit board (the flexible printed circuit board is easily ruptured), so serviceability is extremely poor. In addition, the wiring patterns on both boards can only be formed in a horizontal row, and the pitch of each wiring pattern must also be widened at a certain distance or more (if the pitch is narrow, the solder will not overlap between adjacent wiring patterns). There was a flaw that the space factor was bad (there was a high risk of being shot).

Purpose of the invention The present invention seeks to provide a connector that can correct the above-mentioned deficiencies.

Summary of the invention This invention consists of integrally installing a plurality of elastic pressers on the outer periphery of a disc body, and hard printing the central part of this disc body with a screw in a direction perpendicular to this disc body. A connector configured to elastically press and connect a plurality of wiring patterns of the flexible printed circuit board to a plurality of wiring patterns of the hard printed circuit board using the plurality of pressers by tightening the connector to the board. It is possible to obtain a device that can extremely easily and reliably connect a plurality of wiring patterns between a printed circuit board and a flexible printed circuit board.

Embodiments Hereinafter, embodiments in which the present invention is applied to connectors applied to various electronic devices will be described based on the drawings.

First of all, FIGS. 1 to 5 show the first embodiment. In FIG. 1, 1 is a sheet metal board which is an example of a hard printed board, 2 is a flexible printed board, 3 is a connector, and 4 is a Screw 5 is a metal washer.

The sheet metal substrate 1 is made by forming an insulating layer 8 on one side (or both sides) of a sheet metal 7 such as an aluminum plate, iron plate, or stainless steel plate, as shown in FIG. A plurality of wiring patterns 9 are printed and wired. Note that this sheet metal substrate 1 itself is also used as a sheet metal chassis for various electronic devices. Land portions 9a for connecting the plurality of wiring patterns 9 are arranged in a circular shape at a predetermined pitch around a through hole 10 formed in the sheet metal 7. Note that the wiring pattern 9 is covered with a resist layer 11 except for the land portion 9a, other land portions, and lead portions. The flexible printed circuit board 2, as shown in FIG. 5, has a plurality of wiring patterns 13 printed on one side (or both sides) of a synthetic resin film 12, as shown in FIG. Land portions 13a for connecting the plurality of wiring patterns 13 are arranged in a circular shape at a predetermined pitch around the through holes 14 formed in the synthetic resin film 12. Note that the wiring pattern 13 is covered with a resist layer 15 except for the land portion 13a, other land portions, and lead portions. By the way, the plurality of land portions 9a, 13a of both substrates 1, 2
are the same number, and are arranged facing each other. Further, in both the substrates 1 and 2, positioning holes 16 and 17 are provided on one side of the through holes 10 and 14 so as to face each other.

Next, the connector 3 is made of a synthetic resin with relatively high pressure resistance and heat resistance, such as polycarbonate or polyether sulfon, and is made of a disc body 19 as shown in FIGS. 1 and 3. A plurality of pressers 20 having elasticity on the outer periphery are integrally molded. Note that the presser 20 is formed by forming a plurality of radial slits 21 on the outer periphery of the disk body 19.
0 are provided in a circular shape with the same number and pitch as the land portions 9a and 13a. A through hole 22 is formed in the center of the disc body 19, and an arm part 23 is formed on one side of the disc body 19, and an arm part 23 is formed on the lower surface of the tip of the arm part 23. A vertically protruding positioning pin 24 is integrally molded. Further, as shown in FIG. 3, substantially truncated cone-shaped recesses 25 and 26 are formed on both upper and lower surfaces of the disc body 19, and both recesses 25 and 26 are formed on the outer periphery of the through hole 22 of the disc body 19. A cylindrical boss portion 27 that protrudes above and below 26 is integrally molded. Further, the upper surface 20a of each presser 20 is formed into a horizontal surface, and the lower surface 20b is formed into an arcuate or spherical surface. The outer diameter of the metal washer 5 is larger than the outer diameter of the recess 25 on the upper surface of the disc body 19.

Next, regarding the connection of both boards 1 and 2, first
As shown in the drawings and FIG. 3, the land portions 13a of the plurality of wiring patterns 13 of the flexible printed circuit board 2 are superimposed on the land portions 9a of the plurality of wiring patterns 9 of the sheet metal substrate 1. At this time, the through holes 10 and 14 of both substrates 1 and 2 and the positioning hole 1
Just by matching 6 and 17, land part 9
a, 13a can be easily and accurately matched with predetermined values.

Next, the connector 3 is placed on top of the flexible printed circuit board 2. At this time, the positioning pin 24 is inserted into the positioning holes 16 and 17 of both substrates 1 and 2.
The plurality of pressers 20 of the connector 3 can be removed by simply inserting the connector into
can be easily and accurately aligned with the positions above the plurality of lands 13a located on the lower surface of the flexible printed circuit board 2, respectively.

Next, insert the screw 4 into the metal washer 5, and insert the screw 4 into the through hole 2 from above the connector 3.
2 and screwed into the through hole 10 of the sheet metal substrate 1 from the through hole 14 of the flexible printed circuit board 2 and tightened. Note that the screw 4 at this time is a self-tapping screw. Further, the outer peripheral portion of the metal washer 5 is brought into contact with the upper surface 20a of the plurality of pressers 20.

FIG. 3 shows the state before starting to tighten the screw 4. In this state, there is a gap between the upper surface 27a of the boss portion 27 of the connector 3 and the metal washer 5, and the lower surface of the boss portion 27 27b is in contact with the sheet metal substrate 1 or slightly floating above the sheet metal substrate 1.

Next, when the screw 4 is screwed into the sheet metal substrate 1 and tightened as shown in FIG. 4 in the above state, the metal washer 5 is bent against its elasticity, and the repulsive force of the metal washer 5 is is applied to the upper surface 20a of the presser 20. As a result, the plurality of pressers 20 are bent against the disk body 19 against elasticity, and the lower surface 20b of these pressers 20 is bent.
presses the plurality of lands 13a of the flexible printed circuit board 2 independently from above the flexible printed circuit board 2. Then, as shown in FIG. 5, the plurality of land portions 13a are independently pressed onto the plurality of land portions 9a of the sheet metal substrate 1. At this time, the lower surface 20b of each presser 20
is formed into an arcuate or spherical surface, each land portion 13a and 9a is crimped by point contact or line contact, respectively, and the reliability of the electrical connection between these land portions 13a and 9a is extremely high. expensive. Note that when the screw 4 is tightened to a predetermined state, the lower surface 27b of the boss portion 27 of the connector 3 is brought into contact with the sheet metal board 1 via the flexible printed circuit board 2, and the metal washer 5 is brought into contact with the boss portion 27 of the connector 3. The screw 4 is brought into contact with the upper surface 27a of the screw 4, and prevents further tightening of the screw 4. As a result, both lands 9
a, 13a are always accurately crimped with a constant pressure.

In addition, when removing the connector 3 during service, etc., it is only necessary to remove the screw 4 from the sheet metal board 1, and both boards 1 and 2 can be easily separated, so that serviceability is very good.

Note that the connector 3 of this first embodiment may be molded from metal, and in that case, the metal washer 5
There is no need to use .

Next, FIGS. 6 and 7 show a second embodiment, in which the connector 3 is formed of metal, and a screw serving as a tightening means is attached to the lower surface of the central part of the disc body 19. 29 are integrally molded.

In this case, with the screw 29 of the connector 3 inserted from above into the through holes 10 and 14 of both boards 1 and 2, the nut 30 is screwed into the lower end of the screw 29 from below the sheet metal board 1. By tightening the nut 30, the plurality of land portions 9a and 13a are independently crimped, as in the first embodiment. In this case, a step 31 is integrally provided on the outer periphery of the base of the screw 29, and the sixth
As shown in the figure, before starting tightening, the stepped portion 31 is lifted above the flexible printed circuit board 2.
By tightening the nut 30, the stepped portion 31 is brought into contact with the sheet metal substrate 1 via the flexible printed circuit board 2, as shown in FIG. 7, so that the pressing force between the land portions 9a and 13a is constant.

Note that the shapes and structures of the connectors and screws referred to in the present invention can be modified in various ways other than those shown in the embodiments.

In addition, the hard printed circuit board referred to in the present invention is not limited to the sheet metal board shown in the embodiment,
It may be an ordinary hard printed circuit board in which a wiring pattern is printed on an insulating substrate such as a synthetic resin board.

Effects of the Invention According to the connector of the present invention described above, it is possible to extremely easily connect a plurality of wiring patterns between a hard printed circuit board and a flexible printed circuit board simply by tightening screws. Moreover, since the plurality of pushers of the connector press and connect the plurality of wiring patterns independently,
These connections can always be made very reliably. In addition, the land portions for connecting the wiring patterns can be wired in a circular shape, and the pitch of the land portions can also be made extremely small, resulting in a very good space factor. The service is also very good.

[Brief explanation of the drawing]

The drawings show an embodiment of the connector of the present invention, and FIGS. 1 to 5 show the first embodiment, where FIG. 1 is an exploded perspective view of the whole, and FIG. 3 and 4 are sectional views explaining the connection situation, and FIG. 5 is an enlarged sectional view of the connection part,
FIGS. 6 and 7 are cross-sectional views showing the second embodiment. In addition, in the symbols used in the drawings, 1...sheet metal board, 2...flexible printed circuit board, 3...
...Connector, 4...Screw, 9...Wiring pattern, 9a...Land part of wiring pattern, 10...
Through hole, 13... Wiring pattern, 13a... Land portion of wiring pattern, 14... Through hole, 16, 1
7...Positioning hole, 19...Disc body, 20...
Presser, 21...Slit, 22...Through hole, 2
3...Arm part, 24...Positioning pin, 29...
Neji, 30...nut.

Claims (1)

[Scope of utility model registration request] In a connector that connects multiple wiring patterns on a flexible printed circuit board to multiple wiring patterns on a hard printed circuit board, a plurality of elastic pressers are integrally provided on the outer periphery of a disc body, and the central part of this disc body is By tightening screws to the hard printed circuit board in a direction perpendicular to the disc body, the plurality of pressers are used to connect the plurality of wiring patterns of the flexible printed circuit board to the plurality of wiring patterns of the hard printed circuit board. A connector characterized in that it is configured to be connected by being elastically pressed.