CN100401597C - Positioning connection method of external circuit of keyboard - Google Patents

Abstract

A positioning connection method of a keyboard external circuit comprises the following steps: firstly, providing a keyboard body, a thin film printed circuit board, a flexible printed circuit board and a positioning clamp, wherein the thin film printed circuit board comprises a first side part, a second side part and a first positioning hole, the flexible printed circuit board comprises a third side part, a fourth side part and a second positioning hole, and the positioning clamp comprises a positioning column for aligning and positioning; secondly, electrically connecting the first side part of the film type printed circuit board and the third side part of the flexible printed circuit board to the keyboard body; then, the positioning column penetrates into the first positioning hole of the film type printed circuit board firstly and then penetrates into the second positioning hole of the flexible printed circuit board; and finally, fixing the second side part of the film printed circuit board and the fourth side part of the flexible printed circuit board.

Description

The positioning and connection method of the external line of the keyboard

technical field

The invention relates to a method for positioning and connecting an external circuit of a keyboard, in particular to a method for positioning and connecting an external circuit of a keyboard which is positioned by a positioning column.

Background technique

Generally speaking, the notebook keyboard control circuit can be divided into two parts of the control circuit, including: film printed circuit board control circuit (Membrane PCB) and flexible printed circuit board control circuit (FPC), of which the film type printed circuit board is mainly It is used to control the transmission of keyboard key circuit signals, while the flexible printed circuit board is used to control circuit signals of other components such as trackballs and LED lights. Referring to Fig. 1, Fig. 1 shows a known keyboard external control circuit 10, including: a keyboard body 11, a thin-film printed circuit board 12, and a flexible printed circuit board 13, wherein the thin-film printed circuit board 12 includes A first side portion 121, a second side portion 122, and the flexible printed circuit board 13 includes a third side portion 133, a fourth side portion 134; in addition, the first side portion 121 and the second The three sides 133 are electrically connected to the keyboard body 11 for transmitting circuit control signals. The known method of testing the circuit signals of the film-type printed circuit board 12 and the flexible printed circuit board 13 is to connect the second side portion 122 and the fourth side portion 134 to different test connectors respectively, that is, in practical applications , it is necessary to use two independent signal connectors to transmit keyboard control signals. In fact, if the two can be integrated into a circuit connection part, the purpose of reducing connector parts and cost can be achieved. In addition, if The control circuit board can be fixed at a specific position through proper positioning and connection, which can protect the control circuit board from damage.

Contents of the invention

In view of the known shortcomings, the present invention provides a method for positioning and connecting the external wiring of a keyboard, comprising the following steps: first, providing a keyboard body, a film-type printed circuit board, a flexible printed circuit board, and a positioning fixture, wherein the film The flexible printed circuit board includes a first side portion, a second side portion and a first positioning hole, and the flexible printed circuit board includes a third side portion, a fourth side portion and a second positioning hole , and the positioning fixture includes a positioning column for alignment and positioning; secondly, electrically connect the first side portion of the film-type printed circuit board and the third side portion of the flexible printed circuit board to the keyboard body; then, make the The positioning column first penetrates the first positioning hole of the film-type printed circuit board, and then penetrates into the second positioning hole of the flexible printed circuit board; finally, fixes the second side of the film-type printed circuit board and the flexible printed circuit the fourth side of the panel.

As mentioned above, the method for positioning and connecting the external wiring of the keyboard, wherein the second side of the film-type printed circuit board and the fourth side of the flexible printed circuit board are fixed by adhesive.

As mentioned above, the method for positioning and connecting the external wiring of the keyboard further includes a step of providing a circuit connection part, and fixing the second side of the film-type printed circuit board and the fourth side of the flexible printed circuit board In the second step, the circuit connection part is connected to the second side part of the film type printed circuit board and the fourth side part of the flexible printed circuit board at the same time.

As mentioned above, the method for positioning and connecting the external wiring of the keyboard, wherein the circuit connecting part includes an adhesive substance, and is fixed on the second side of the film-type printed circuit board and the fourth side of the flexible printed circuit board. In the step, the adhesive substance of the circuit connection part is connected to the second side part of the film-type printed circuit board and the fourth side part of the flexible printed circuit board at the same time.

As mentioned above, the method for positioning and connecting the external wiring of the keyboard, wherein the flexible printed circuit board further includes a back glue disposed on the fourth side, and the viscous substance of the circuit connection part is glued to the flexible printed circuit board Adhesive.

The method for positioning and connecting the external wiring of the keyboard as described above, wherein after the step of making the positioning column penetrate the first positioning hole of the film-type printed circuit board, it also includes a step of flattening the film-type printed circuit board on the positioning fixture .

As mentioned above, the method for positioning and connecting the external wiring of the keyboard, after the step of making the positioning column penetrate the second positioning hole of the flexible printed circuit board, further includes a step of flattening the flexible printed circuit board on the positioning fixture .

As mentioned above, the method for positioning and connecting the external wiring of the keyboard, wherein the first positioning hole and the second positioning hole are made by punching.

In order to make the above objects, features, structures, functions and advantages of the present invention more comprehensible, preferred embodiments are specifically cited below and described in detail in conjunction with the accompanying drawings.

Description of drawings

Fig. 1 is the schematic diagram that represents known keyboard external control circuit;

Fig. 2 is the schematic diagram representing the keyboard external control circuit of the present invention;

Fig. 3 is the schematic diagram representing the positioning fixture applied by the present invention;

Fig. 4 is to represent the completed figure of keyboard external circuit of the present invention after positioning connection; And

Fig. 5 is a flow chart showing the method for locating and connecting the external keyboard of the present invention.

Explanation of reference symbols:

10～External connection line of known keyboard

11～Keyboard body

12～film type printed circuit board

121～first side part

122～Second side part

13～Flexible printed circuit board

133～third side part

134～fourth side part

20～Keyboard external connection line

21～Keyboard body

22～film type printed circuit board

221～First side part

222～Second side part

223～the first positioning hole

224～Circuit connection part

23～Flexible printed circuit board

231～Second positioning hole

233～third side

234～4th side part

31～Positioning fixture

311～Positioning column

Detailed ways

First of all, referring to Fig. 2, Fig. 2 shows a schematic diagram of the keyboard external circuit 20 of the present invention, including a keyboard body 21, a thin-film printed circuit board 22, and a flexible printed circuit board 23, wherein the thin-film printed circuit board The board 22 includes a first side portion 221, a second side portion 222, two first positioning holes 223 and a circuit connection portion 224, and the flexible printed circuit board 23 includes a third side portion 233, a The fourth side portion 234 and the two second positioning holes 231, in addition, the first positioning hole 223 and the second positioning hole 231 are formed by punching; in addition, the first side portion 221 and the third side portion 233 is electrically connected to the keyboard body 21 for transmitting circuit control signals.

Next, referring to Fig. 3, shown in Fig. 3 is the schematic diagram of the positioning fixture used in the present invention, as shown in the figure, the positioning fixture 31 is made into an appearance that can accommodate the keyboard connection circuit, and it includes two positioning columns 311, For alignment and positioning.

Then refer to FIG. 2 and FIG. 4 at the same time. FIG. 4 is a completed diagram of the keyboard external circuit of the present invention after positioning and connection. The positioning columns 311 on the positioning fixture 31 respectively penetrate into the first positioning holes 223 of the film-type printed circuit board 22 in sequence. and the second positioning hole 231 of the flexible printed circuit board 23 to complete the positioning, and then through the viscous substance on the circuit connection part 224 and the back glue on the fourth side part 234 of the flexible printed circuit board 23, the flexible printed circuit board The fourth side portion 234 of the circuit board 23 is bonded to the circuit connection portion 224, so that the second side portion 222 of the film type printed circuit board 22 and the fourth side portion 234 of the flexible printed circuit board 23 It can be integrated into a single circuit connection area. In addition, through the adhesive on the back of the flexible printed circuit board 23, the flexible printed circuit board 23 is flatly pasted on the film-type printed circuit board 22, so that it can be fixed at a specific position, which can protect the The control circuit board will not cause damage.

Referring to FIG. 5 again, FIG. 5 is a flow chart showing the steps of the present invention. Step S1 is to provide a keyboard body 21, a thin-film printed circuit board 22, and a flexible printed circuit board 23, wherein the thin-film printed circuit board 22 includes a first side portion 221, a second side portion 222 and a The first positioning hole 223 and a circuit connection portion 224 for connecting the film type printed circuit board 22 and the flexible printed circuit board 23, and the flexible printed circuit board 23 includes a third side portion 233, a fourth side part 234 and a second positioning hole 231 .

Step S2 is to provide a positioning jig 31, wherein the positioning jig includes a positioning column 311 for alignment and positioning; in step S3, the first side portion 221 of the film type printed circuit board 22 and the flexible printed circuit board 23 The third side portion 233 of the keyboard body 21 is electrically connected to transmit the output signal of the keyboard body 21; step S4 is to make the positioning post 311 penetrate the first positioning hole 221 of the film-type printed circuit board 22, and print the film-type The circuit board 22 is flattened on the positioning jig 31 ; step S5 is to make the positioning column 311 pass through the second positioning hole 231 of the flexible printed circuit board 23 , and flatten the flexible printed circuit board 23 on the positioning jig 31 .

Finally, step S6 is a step of fixing the second side portion 222 of the film type printed circuit board 22 and the fourth side portion 234 of the flexible printed circuit board. The adhesive on the fourth side portion 234 of the flexible printed circuit board 23 adheres the fourth side portion 234 of the flexible printed circuit board 23 to the circuit connection portion 224 to form a connection circuit for testing or actual product application . Therefore, through the above invention, the effect of reducing the number of parts and reducing the cost can be achieved.

Although the present invention is disclosed above with preferred embodiments, it is not intended to limit the scope of the present invention. Any person skilled in the art can make various changes and modifications without departing from the scope of the present invention. The protection of the present invention The scope should be defined by the claims and their equivalents.

Claims (9)

1. A method for positioning and connecting a keyboard external circuit, comprising the following steps: Step 1: providing a film-type printed circuit board, the film-type printed circuit board including a first side portion, a second side portion and a first positioning hole; Step 2: providing a flexible printed circuit board, the flexible printed circuit board includes a third side portion, a fourth side portion and a second positioning hole; Step 3: providing a positioning fixture, the positioning fixture includes a positioning column; Step 4: electrically connecting the first side portion of the film-type printed circuit board and the third side portion of the flexible printed circuit board to the keyboard body; Step 5: Make the positioning column pass through the first positioning hole; Step 6: Make the positioning column pass through the second positioning hole; Step 7: Fixing the second side portion of the film-type printed circuit board and the fourth side portion of the flexible printed circuit board. 2. The method for positioning and connecting keyboard external circuits as claimed in claim 1, characterized in that: in step 7, the second side of the thin-film printed circuit board and the fourth side of the flexible printed circuit board The part is fixed by glue. 3. The method for positioning and connecting keyboard external lines as claimed in claim 1, characterized in that: it also includes the step of providing a circuit connection part, and step 7 is to make the circuit connection part connect to the second part of the film type printed circuit board simultaneously. a side portion and a fourth side portion of the flexible printed circuit board. 4. The method for positioning and connecting the external circuit of the keyboard as claimed in claim 3, characterized in that: the circuit connection part comprises a viscous substance, and step 7 is to make the viscous substance of the circuit connection part connect the film type printed circuit at the same time The second side portion of the board and the fourth side portion of the flexible printed circuit board. 5. The method for positioning and connecting keyboard external circuits as claimed in claim 4, characterized in that: the flexible printed circuit board also includes a back glue arranged on the fourth side edge, and in step 7, the circuit The viscous substance in the connection part is the back glue adhered to the flexible printed circuit board. 6. The method for positioning and connecting the external circuit of the keyboard according to claim 1, wherein the first positioning hole is punched. 7. The method for positioning and connecting the external wiring of the keyboard as claimed in claim 1, wherein the second positioning hole is punched. 8 . The method for positioning and connecting the external wiring of the keyboard according to claim 1 , wherein, between step 5 and step 7, further comprising the step of pressing the thin-mode printed circuit board on the positioning jig. 9 . 9. The method for positioning and connecting the external circuit of the keyboard according to claim 1, further comprising the step of pressing the flexible printed circuit board on the positioning fixture between step 6 and step 7.

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