JPS6280926A - Keyboard unit - 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 [Field of Industrial Application] The present invention relates to a keyboard device, in particular, to input a key by pressing and contacting a plurality of printed circuit boards arranged opposite each other through an exterior member bonded to the printed circuit boards. The present invention relates to a keyboard device.

[Prior Art] Conventionally, as keyboards for small devices such as thin calculators, flexible printed boards with circuit patterns that should be brought into contact when entering keys are arranged facing each other, and input is made by pressing and touching these boards. The structure of a so-called membrane keyboard is known.

Normally, this type of keyboard is the main component)
J, L: Consists of a laminated structure of plates, reinforcing plates, spacers, display sheets on which key input contents are printed, and other members.

[Problems to be Solved by the Invention] When manufacturing this type of keyboard, structural members are successively bonded and laminated on a member with good r-surface properties. For example, in a keyboard like the one shown in Figure 9, first display sheet 1
．． A laminate is formed by pasting together the upper printed circuit board 2, a reinforcing plate 5J-, a dot print, the board 4 and the key spacer 3, and then these are fixed with adhesive to form a laminate structure. is completed.

By the way, the display sheet 1 also serves as the exterior of the device, and the exterior material and the display sheet may be separate members. For example, there is a structure in which the exterior material is made of a soft material, the display sheet is made of a hard material such as vinyl chloride, and the exterior material is formed by pasting these materials together.

Is it easier to attach this type of display sheet and exterior material using a high-frequency welder than using an adhesive? n.It is reliable and low cost.

However, in the case of a high-frequency welter, if an attempt is made to weld a display sheet to which a printed circuit board with patterned conductors has already been pasted, the welter's current will concentrate on the patterned conductors of the printed circuit board, so only the display sheet must be welded in the above order. There may be cases where it is better to use an adhesive to attach the parts at the end. However, in the structure shown in Fig. 9, if the display sheet 1 is pasted last, the J: section printed circuit board 2 will be 50
Since the material is thin, about 1 Lm, there is a possibility that the substrate 2 will sag as shown by the broken line in FIG.

This slack is a problem because it may cause malfunction due to erroneous contact between the upper and lower printed circuit boards.

In addition, when welding with a high-frequency welter, there is a problem that the adhesive strength tends to vary if the spatial distance between the parts to be welded is not uniform.In the end, with a high-frequency welter, the welded part must be a uniform plane and an insulating material. , etc., and a structure that allows reliable stacking inside the cylinder is desired.

[Step F for Solving the Problems] In order to solve the above problems, the present invention provides a keyboard in which key input is performed by pressing and contacting a plurality of printed circuit boards arranged opposite each other through an exterior member. In the device, an uneven strip (or) a non-adhesive portion communicating with the uneven strip is provided in communication with the exterior member, and a hole is provided in the printed circuit board that communicates with the uneven strip or the non-adhesive portion. A new configuration was adopted.

[Sakukawa] According to the configuration described above, when the exterior member and the printed circuit board are connected, excess air bubbles remain between the two, causing the printed circuit board to sag, and causing problems such as erroneous input. It is possible to extract the air from the concavo-convex stripes and non-adhesive areas through the holes in the printed circuit board.
Using an adhesive, it is possible to bond the exterior member to the printed circuit board with the same reliability as using a high-frequency welter.

[Example] The present invention will be described in detail below based on an example shown in one drawing.

Figure 1 shows the top surface of a keyboard according to the invention, and Figure 2 shows a cross section taken along line A--A in Figure 1. As shown in FIGS. 1 and 2, the display sheet 1' is made of a material such as vinyl chloride, and has uneven stripes 6 formed in a square shape over its entire surface by drawing using a press or the like. In this embodiment, the display sheet 1' also serves as an exterior material, and the rectangular parts separated by the uneven stripes 6 correspond to the keypads to be operated, respectively, and key input contents and other information are stored at these positions. printed.

The display sheet 1' configured as above is shown in FIGS. 3 and 4.
As shown in the figure, the L section printed circuit board 2', key spacer 3. It is bonded to the laminate of the lower printed circuit board 4 and the reinforcing plate 5 with an adhesive 8. At this time, the adhesive 8 is as shown in FIG.

As shown by diagonal lines in FIG. 2, the rectangular portion of the display sheet 1' extending just below each key in the vertical direction in FIG. 1 is not coated, and this portion serves as a non-adhesive portion 7.

On the other hand, FIG. 3 shows the top surface of the laminated structure from the upper printed circuit board 2' to the reinforcing plate 5, and FIG. 4 shows a cross section taken along line B-B in FIG. A hole 9 is provided in a portion of the F section printed circuit board 2'. this hole 9
is formed at the position of the opening 3a provided for contact between the upper printed circuit board 2' and the lower printed circuit board 4. The position of this hole 9 also corresponds to the position δ of the non-adhesive portion 7.

In the above configuration, when the display sheet 1' shown in FIGS. 1 and 2 is pasted on the laminate shown in FIGS. 3 and 4, excess air which conventionally causes slack between the display sheet and the upper printed circuit board passes through the interconnected concavo-convex strip gB6 and the non-adhesive portion 7 into the hole 9 of the upper printed circuit board 2', and passes into the opening of the key spacer 3. Therefore, air bubbles do not enter between the display sheet 1' and the upper printed circuit board 2' and sag does not occur as in the conventional case, and malfunctions such as the upper and lower printed circuit boards coming into contact with each other are prevented. 1 hit.

In the following, excess air between the display sheet 1' and the lower printed circuit board is guided into the opening of the spacer through the hole 9, but if air is to be vented from within this opening, the lower printed circuit board 4 A hole is made in one part of the reinforcing plate 5. Alternatively, a conventional structure may be used, such as cutting out a groove from the opening part of the key spacer to its outer periphery.

Furthermore, according to the above configuration, the frame-shaped uneven stripes formed by drawing work function as partitions between the keys, so there is an advantage that the operability of the keyboard can be improved.

On the back of the shaver, hole 1 in the printed circuit board that communicates with the non-adhesive part 7 is inserted.
However, as shown in the embodiments shown in FIGS. 5 to 8, a plurality of holes 9 are formed in the upper printed part (board It may also be provided.

5 to 8 respectively correspond to FIGS. 1 to 4 of the first embodiment, and as shown in FIG. It communicates with hole 9. Since it is not necessary to provide the concavo-convex stripes that communicated the non-adhesive portions 7 in the first embodiment, they are not shown here.

With the configuration as described below, not only the same effects as those of the first embodiment can be obtained, but also the air can be vented more reliably through the plurality of holes.

Although an example in which the concave and convex stripes are omitted is shown in the description L, an embodiment with only the concave and convex stripes and holes is also conceivable, and in that case, of course, a plurality of air vent holes can be provided.

[Effect] As is clear from the explanation below, according to the present invention, by pressing a plurality of printed circuit boards arranged opposite each other through the exterior member, the circuit patterns of each printed circuit board are brought into contact with each other, and a key is pressed. In the keyboard device for inputting information, a structure is adopted in which a hole is provided in the printed circuit board through which an uneven strip or non-adhesive portion communicates with the uneven strip or non-adhesive portion. Because of this, excess air that may remain between the printed circuit board and the exterior member when they are bonded can be released through the non-bonded part and the uneven stripes, which has a negative impact on key input! It is possible to provide an excellent keyboard device that can prevent the printed circuit board from sagging, can be manufactured by simple operations, and allows reliable key input.

[Brief explanation of drawings]

1 to 4 show a first embodiment of the keyboard device of the present invention, and FIG. 1 is a two-sided view of a display sheet,
The figure is a sectional view taken along line A-A in Figure 1, Figure 3 is a top view of the laminate to which the display sheet is adhered, and Figure 4 is B in Figure 3.
5 to 8 show a second embodiment of the keyboard device of the present invention, FIG. 5 is a top view of the display sheet, and FIG. 6 is a sectional view taken along line B. Figure 7 is a cross-sectional view taken along line A-A of Figure 7. Figure 58 is a cross-sectional view taken along line B-B of Figure 7.
10 and 10 illustrate the structure of a conventional membrane keyboard, FIG. 9 is an exploded perspective view of the keyboard, and FIG. 10 is a sectional view of the keyboard of FIG. 9. 1'...Display sheet 2...L part printed circuit board 3
...Key spacer 4...Lower printed circuit board 5.
... Reinforcement plate 6 ... Uneven striped part 7 ... Non-adhesive part 8 ... Adhesive material 9 ... Hole Patent applicant Canon Co., Ltd. 1. '''='1 Agent Patent Attorney Taku Kato 11 ・---1,, Figure 9 Keyboard l! VT face Figure 10 H Kudo

Claims (1)

[Scope of Claims] 1) In a keyboard device in which key input is performed by pressing and contacting a plurality of printed circuit boards arranged opposite each other via an exterior member bonded to the printed circuit boards, an uneven strip communicating with the exterior member is provided. What is claimed is: 1. A keyboard device characterized in that a printed circuit board is provided with a hole that communicates with the uneven strip portion. 2) In a keyboard device in which key input is performed by pressing and contacting a plurality of printed circuit boards arranged facing each other through an exterior member bonded to the printed circuit boards, the exterior member is provided with a non-adhesive portion, and the printed circuit board is provided with a non-adhesive portion. A keyboard device characterized by having a hole communicating with an adhesive part. 3) The keyboard device according to claim 2, wherein a plurality of sets of the communicating non-adhesive portions and holes are provided. 4) In a keyboard device in which key input is performed by pressing and contacting a plurality of printed circuit boards arranged opposite each other through an exterior member, an uneven strip communicating with the exterior member and a non-adhesive portion communicating with the uneven strip are provided. What is claimed is: 1. A keyboard device characterized in that a printed circuit board is provided with a hole that communicates with the uneven striped portion or the non-adhesive portion.