JPS5816212Y2 - Structure of display printed circuit board - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to the structure of a printed circuit board on which display elements and switching elements are mounted.

For buttons on devices such as clocks and timers, it is preferable for ease of operation to arrange the operating switch and the corresponding display element for displaying the time on one printed circuit board.
If the size of the printed circuit board is limited, if all necessary components are mounted on the printed circuit board, the display section will become smaller.

In particular, when displaying a character pattern such as the time, it is necessary to make the display pattern as large as possible, but the display area is limited by the size and number of component parts, and this has the disadvantage that it cannot be made larger. Ta.

FIG. 1 is a perspective view of a conventional display printed circuit board, and FIG. 2 is a sectional view taken along line A-A' in FIG.

In FIG. 1, 1 is a printed circuit board, and 2) Ii switch shaft, which is, for example, a shaft for a push button type key switch.

Reference numeral 3 denotes a second housing that houses the contact portions of the switch, such as copper foils 5 and 6, the switch shaft 2, and a rubber 7 for providing springiness when the switch shaft 2 is pressed, as shown in the figure.

Further, 4 is a display section in which display elements are arranged.

Furthermore, in this type of display printed circuit board, in order to indicate which switch is on, it is necessary to arrange a light emitting diode near the shaft and cause the corresponding element to emit light.

However, if the size of the printed circuit board 1 is limited, it is difficult to reduce the size of the switch storage housing, so the size of the display section 4 has to be reduced, and the characters displayed on the display section are There is a drawback that it becomes difficult to see.

In addition, there is a drawback that in some cases it is not possible to arrange a light emitting diode.

An object of the present invention is to solve the above-mentioned conventional problems and to provide a display printed circuit board arrangement structure that can separate the modification section and the display section and increase the sound of the display section.

In order to achieve the above objectives, this invention separates the printed circuit board on which the operating and display components are mounted, places the printed circuit board with the display component mounted on the front side, and places the display section on the rear of the printed circuit board. The structure is such that a printed circuit board loaded with heavy metal is placed on the front board, and the front board is fully drilled so that levers, shafts, etc. for conversion can be pulled out from the rear board through the holes.

FIG. 3 is a perspective view showing an embodiment of the display printed circuit board arrangement structure according to the present invention, FIG. 4 a is a perspective view showing a partially cut away front printed circuit board, and FIG. FIG. 4 is a partial cross-sectional view of the structure shown in FIG. 3;

In these figures, a printed circuit board 10 is mainly arranged with display elements, and a printed circuit board 12 is arranged with operation parts such as switches and nozzles.

13 is the opening for passing the switch's shirt (opening 1).
The size of 3 is such that the switch shaft 2 can be inserted therethrough.

Note that 14 is a light emitting diode.

Thus, in the conventional embodiment, the housing 3 of the switch
However, in the embodiment of the present invention, the space other than the opening 13 can be used as a space for arranging display elements.

As explained above, according to the present invention, when a switch or the like is used as an operating component, it is possible to expand the space for display components, which was previously restricted by the housing of the switch.

Furthermore, the cost increase can be minimized in the present invention for the following reason.

That is, in the case of the conventional embodiment, the switch contact portion is electrically connected to copper foil or gold-plated patterns 5 and 6 placed close to the printed circuit board using conductive rubber 7, etc., as shown in FIG. However, in this case, the contact patterns 5 and 6 described above must be placed on the front surface of the printed circuit board shown in FIG.

In addition, for display parts, a method is used in which a hole is made in a printed circuit board and the terminal lead of the component is inserted into the hole and then soldered to a copper foil pattern on the back side of the printed circuit board.

Therefore, it is necessary to use printed circuit boards with copper foil on both the front and back sides, and from a cost standpoint, our manufacturing method requires printed circuit boards with copper foil on one side and copper foil on both sides, and the latter costs about twice as much as the former. Since the cost is double, Figure 1,
The results show that there is almost no difference in cost between the embodiments shown in FIG.

It is clear from the above description that even if the double-sided copper foil printed board is used, the effects of the present invention cannot be obtained.

[Brief explanation of drawings]

FIG. 1 is a perspective view of a conventional display printed circuit board, FIG. 2 is a view taken along line A-Am in FIG. 1, and FIG. 3 is a perspective view showing an embodiment of the arrangement structure of a display printed circuit board according to the present invention. FIG. 4a is a cutaway perspective view of the front printed circuit board, and FIG. 4 is a partial sectional view of the structure shown in FIG. 3. 1... Printed circuit board, 2... Yaft for switch,
3...Switch unit housing, 4...Display unit, 1
0°12...Printed circuit board, 13...Opening hole, 14.
...Light emitting diode.

Claims (1)

[Scope of utility model registration request] A button for a device in which a display section and an operation section are disposed close to each other on substantially the same plane includes a first printed circuit board on which a display element is arranged and a second printed circuit board on which an operation element is arranged. , a first printed circuit board is placed in front of a second printed circuit board, an opening is provided in the first printed circuit board, and a second printed circuit board is provided.
A structure of a display printed circuit board, characterized in that an operation shaft of an operation element arranged on the first printed circuit board is brought out through the opening to the front side of the first printed circuit board.