JPS5844682A - Device for connecting printed circuit board - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a printed wiring board connection device that connects electrically to other circuits by inserting a connector into the printed wiring board. By improving the shape of the part of the board where the connector is inserted and mated and the circuit design of the conductive pattern, we aim to improve the workability of mating the printed wiring board and connector and prevent incorrect connections, thereby increasing the safety of the entire connected circuit9. The purpose is to improve reliability.

In general, connectors are often used to conductively connect electronic circuits made by attaching various electrical components to printed wiring boards with other connected devices. It is necessary to eliminate looseness and pre-insertion and insert it accurately and smoothly.

FIG. 1 shows the relationship between a printed wiring board 2 and a connector 6 with a vertical side view of a general electronic desktop calculator. FIG. 2 is an exploded perspective view showing the insertion and fitting relationship between the connecting terminal portion 21 of the printed wiring board 2 and the connector 6. In the figure, 1 is a housing of an electronic desktop calculator.The housing 1 can be divided into an upper side and a lower side.A keyboard, a power supply device, etc. are attached to the upper side, and a printed wiring board 2 is installed on the lower side. . A connecting terminal portion 21 is formed on the printed wiring board 2, and by inserting the connector 5 into the connecting terminal portion 21, electrical connection with a keyboard, a power supply device, etc. is achieved although not shown. Third
The figures are detailed views of the same connector 5 as described above, in which M is a top view, B is a rear view, C is a back view, and D is a cross-sectional side view showing the structure of contact terminals sa and sb. Here, 51 is a terminal portion to be soldered, sb is a contact spring, and 5c is a connector body made of an insulator.

Fig. 4 is a contact configuration diagram of a typical connector 6.5', 5'', where M is a contact that contacts only one side of the printed wiring board, B is the same as in Fig. 3, and is a contact that contacts only one side of the printed wiring board. C is a contact that contacts both sides of the printed wiring board and is electrically connected to both sides, and C is an electrically independent contact that contacts both sides of the printed wiring board.Here, 61L, 5!L
', 6! L" is for soldering terminals, sb, sb', 5b"
is a contact spring, and contact spring 5 is also used in case of a fall.
b, 5b', 5b" is the connector body 60.60', 5
It has a structure that is inclined toward the inside of d', and has the function of pressing from the side when the connecting terminal portion of the printed wiring board is inserted.

Next, attach the printed wiring board 2' to the same connectors 5.5' and 5''.

FIG. 6 shows a side cross-sectional view of a state in which the connection terminal portions 2C' and 20" of 2" have started to be inserted. The thickness of the printed wiring boards 2', 2'' is generally from 1.6''Xn to 2.0''Xn, and the connection terminal portions 20' to the contact springs 6b', 5b, 6b''
, 2 d' requires an extremely large insertion and removal force at the beginning of insertion and fitting. Here, 21L', 2a'' are conductive foil patterns. In this case, if there are many connection circuits and the number of contacts is 10 or more, it will be difficult to easily and accurately insert them by hand, so special jigs and tools will be required. The need had arisen.

In the case of manual operation, in order to insert the connectors 6° 6', 6" in an inclined state so as not to receive the insertion and removal force of the entire contact spring at once, insert the printed wiring board 2' and the connection terminal part 20' of the
In some cases, multiple conductive patterns on one end surface of 20" were not connected at the same time, or came into contact with adjacent conductive patterns, causing a short circuit due to incorrect connection. Also, in the design of conductive patterns, there were constraints This caused problems as the arrangement had to be regulated.Furthermore, it was necessary to provide guide lips on both sides of the connector (5;-1) as a means for more accurate insertion.Furthermore, it was necessary to provide guide lips on both sides of the connector. Since springs take into consideration not only conductive properties but also durability, they have the disadvantage of using extremely expensive materials and increasing costs.

FIG. 6 is an overall front view of a conventional printed wiring board, in which 62 is a printed wiring board, 62a is a copper foil pattern, and 62
b is a guide recess when the connector is inserted and fitted, 62bl is a slot to prevent connector reverse insertion, 620 is a protrusion for plugging, 62(
! , 62 (1' is a cathode ray tube printing plate part that is used after soldering is divided into parts, 62el.

62f is another printed circuit section that is divided and used in the same manner as above. The tip of the connector protrusion 620 is in a straight line, and when the connector is initially inserted and fitted, an extremely large insertion and removal force is required and a jig is required.

Furthermore, when various electrical components are inserted into the printed wiring board 62 (not shown), it is necessary to specially mask the guide recess 62b during automatic soldering dip to prevent the solder from floating and protruding onto the component insertion surface.

6 b.

The present invention eliminates the above-mentioned conventional drawbacks, and provides a printed wiring board connection device that has a simple configuration, reduces arrangement restrictions in pattern design, is inexpensive, and has high productivity. .

An embodiment of the present invention will be described below with reference to FIGS. 7 to 9. Figures 7, B, and O are detailed views of plug convex portions of a printed wiring board according to a specific embodiment of the present invention. (10 pieces shown)
Copper foil pattern 721L.

Connecting convex portion 72C9 for aligning and arranging 72a', 72a''
Missing recesses 72b are provided at the tips of 72c' and 72c''.

72b', 72b''.

In Fig. 7, the shape of the missing recess 72b is the same as that of the plug protrusion 720.
The copper foil patterns 721L on both end sides each have a width tIX and a depth hl, including four copper foil/(turns (721L)) located in the center, with three remaining.

Although not shown, the maximum wave bonding force when inserting and fitting the connector is reduced to 6/1o of the conventional example because the contact springs are divided into 6 and 4 pieces. 7th
Figure B shows the shape of the missing recess 72b', leaving two copper foil patterns 72a' on both end sides of the plug projection 720', and
A recess with a width t2 and a depth h2 is provided from both sides toward the center at an interval of two copper foil patterns (721L'), and the central part is connected to the recess and has a width ts and a depth hl. Similarly to the above, the maximum insertion and removal force when inserting and fitting the connector is 4 contact springs, which is 4/10 of the magnitude of the conventional example. In Fig. 7C, the shape of the missing recess 72b'' is the convex part for the plug?20'', with two copper foil patterns 72&II remaining on both end sides, connected in a width t2 x depth h4, and the center part is deep. It is inclined towards the direction h5. Same as above 4HC
The maximum insertion and removal force of the connector is 4/10 of that of the conventional example due to the 4 contact springs.

Although the illustration is exaggerated, it is enough to cover the variation in the contact springs of the connector. The effect can be achieved by providing a step with a depth of 6 to 1 gourd. Further, in this configuration, the connection characteristics between the copper foil pattern and the contact spring are not deteriorated. 7211, which prevents reverse insertion of connectors even in the production process of printed wiring boards.
72d', 72d" It is possible to form the missing recesses in various shapes by easier processing without being limited to the illustrated example.

In addition, an even greater effect can be obtained when the present invention is applied to a connector with a large number of contacts, which has a large printed wiring board and a thick board, and has contacts on both sides of the board, each having an electrically independent contact configuration.

Next, regarding the specific circuit configuration using the printed wiring board connection device of the present invention, FIG. 8 is a block diagram of a general cathode ray tube display unit, and FIG. 9 is a connection mode of the printed wiring board connector protrusion of the same unit. This is explained in detail in the figure. In the figure, many electrical components are inserted into a printed wiring board 92, forming an electronic circuit for reproducing input signals to the cathode ray tube. Moreover, ten copper foil patterns 92 are formed on one end surface of this printed wiring board 92.
Connecting convex portions 92C for arranging the 1L are integrally formed and serve to enable electrical connection with other equipment by inserting and fitting the connector 96 thereinto. Here the number■,■
The copper foil pattern 921L is the ground circuit part, numbers ■, ■, ■
The copper foil pattern is the brightness adjustment port 9 knee path, the number ■ is for the ■B power supply, the number ■ is for the horizontal synchronization circuit, the number ■ is for the input video signal circuit, and the number ■ is for the vertical synchronization circuit. It is something to do. As shown in the detailed front view of the plug projection 920 in Fig. 9, the copper foil patterns 92 & are on both end sides ■, ■, ■, ■, ■, ■ are formed on the same surface as the tip. However, by forming the recesses 92b in the parts near the center where the copper foil patterns of ■, ■, ■, ■ are formed, the connector 95 is connected to the connector protrusion 92G of the printed wiring board 92. When inserting , first connect the earth circuit (■) and [phase], and then connect the (B) supply power circuit (■). Therefore, the circuit between the connected devices always operates in a stable state. Furthermore, the shortcomings of the conventional example, such as short circuits caused by incorrect connections due to variations in the connector's contract springs and inclination of the connector insertion direction, and defects in internal parts can be reduced.

In the configuration of an electronic desktop calculator, which is a general consumer device, once a connector is inserted and mated to a printed wiring board during the production process, it is then necessary to attach the connector to the printed wiring board for 10 days to repair the defect.

However, in industrial equipment such as cathode ray tube display units, users can freely attach and detach connectors and connect them to many devices in combination, so connectors are inserted and mated (attached and detached) frequently. However, by introducing this method, up to about 30 connected circuits can be easily connected to a printed wiring board with a plug that forms a convex part with a missing recess on one end surface of the printed wiring board, and is easy to operate. connection can be made. In FIG. 9, reference numeral 92d indicates a slot for preventing reverse insertion of the connector, and FIG. 9B is a front view of the connector that is inserted and fitted into the connector protrusion 920 of the printed wiring board.

According to the configurations shown in FIGS. 8 and 9, by designing the circuit so that the copper foil patterns on both end sides are used as ground circuits and the copper foil patterns in the missing recesses are used as 1B power supply patterns,
Even if the insertion direction of the connector is inclined, incorrect connection can be prevented and short circuits and other inconveniences can be reliably prevented. Further, guide ribs of the connector are not required, which simplifies the mechanism. Further, in designing the copper foil pattern, there are fewer restrictions on the arrangement, which is advantageous in terms of design. Furthermore, even when the connector is removed, the B power supply circuit is cut off quickly and the grounding circuit is delayed, so that there is no occurrence of spots on the cathode ray tube. Therefore, in the configurations shown in FIGS. 8 and 9, the plug projection 9
As long as at least one copper foil pattern on both end portions of 20 remains, the shape of the missing recess 92b can be made into any shape.

As explained above, according to the present invention, the conductive patterns on both ends of the printed wiring board are circulated through the four missing parts so as to remain at the tip end of the connector convex part. The connector can be easily inserted and fitted, which is extremely effective especially when there are a large number of contacts, and the working time can be shortened. Moreover, for this reason, the material of the contacts in the connector can be made inexpensive, contributing to cost reduction.

In addition, by devising the arrangement of the copper foil patterns in the convex part for connection according to the circuit, for example, in a cathode ray tube display device, the copper foil pattern for supplying a +B source can be positioned in the recessed part, and the copper foil pattern can be placed in the recessed part. By arranging the ground circuit copper foil pattern in the lower part, it is possible to prevent erroneous connections and also to prevent the occurrence of spots because the 1B power supply circuit is cut off quickly when the connector is removed.

[Brief explanation of drawings]

Fig. 1 is a longitudinal side view of a general electronic desktop calculator, Fig. 2 is an exploded perspective view of the connection part of the printed wiring board in the same computer,
Fig. 3 is a detailed view of the connector in the same computer, where M is a top view, B is a front view, and C is a back view. D is a cross-sectional side view, Figures 4, B, (j are respective contact configuration diagrams of the connector, Figure 6 is a diagram showing the start of insertion of the printed wiring board into the contact spring of the same connector, FIG. 6 is an overall view of a printed wiring board in a conventional example, FIGS. is a block diagram of a typical cathode ray tube display unit,
Figure 9, B shows the same cathode ray tube display unit as above;
FIG. 13 is a diagram showing a connecting portion of a printed wiring board that can be protected and a connector corresponding to the connecting portion. 72.72', 72", 92・mountain...printed wiring board, 72
1L, 721L', 72 &#, 921L...
...Copper foil pattern, 72b, 72b', 72b"
, 92b... A missing recess formed in the plug convex part,
720,72C'. 720", 920...Protrusion for plugging on printed wiring board, 5, 5', Ef/, 95...Connector. Name of agent: Patent attorney Toshio Nakao and one other person 1st
Figure 1 Figure 3 Figure 4 (C) CB) (C) Figure 5 Figure 6

Claims (1)

[Claims] (1) A printed wiring board having a connector convex portion in which a plurality of conductive patterns are aligned and arranged on one end surface, and a connector inserted into the connector convex portion; 1. A connection device for a printed wiring board, characterized in that a recess is formed at the tip of the protrusion, and the recess is formed by excluding conductive patterns located on both end sides of the plug protrusion. (The conductive patterns located on both ends of the plug convex part are the ground circuits, and the conductive patterns located in the missing recesses are e
A printed wiring board connection device according to claim 1, which is formed by designing a circuit pattern as a B voltage circuit.