JP2586752Y2 - Thin switch - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a thin switch used for a card-type electronic device or the like.

[Prior Art] In recent years, small electronic devices such as portable calculators have been reduced in thickness to cards. With the increase in the cover of electronic devices, switches used in electronic devices have also been reduced in thickness.

A conventional thin switch will be described with reference to FIG.

In the drawing, reference numeral 1 denotes a case main body. A printed wiring board 2 is provided inside the case main body 1 and a panel 3 is provided with a gap from the printed wiring board 2. Has a window hole 4 for a switch. A flexible cover 5 is attached to the surface of the panel 3, and a conductive contact plate 6 is fixed to a portion of the cover 5 facing the window hole 4. on the other hand,
A pattern conducted by the contact plate 6 is printed on the printed wiring board 2 at a position facing the contact plate 6.

When the switch portion printed on the decorative cover 5 is pressed, the contact plate 6 is pressed by the pattern, and the pattern is electrically connected.

[Problem to be Solved by the Invention] However, in the above-mentioned conventional thin switch, there is a problem that when the switch portion of the decorative cover 5 is pressed, the repulsive force and stroke until the switch is turned on are small, and there is no operational feeling. Was.

The present invention has been made in view of such circumstances and aims to provide a thin switch having an operational feeling.

Means for Solving the Problems According to the present invention, two pairs of upper and lower wiring sheets are provided on a printed wiring board, and a connection pattern is printed on opposing surfaces of the wiring sheet, and the connection pattern is printed. Connecting to a wiring board, providing a curved plate spring having a projection on the wiring sheet side on the wiring sheet, and forming a switch hole in a portion corresponding to the plate spring of a case for storing a printed wiring board; A pressure-sensitive plate extending to the upper side of the spring is provided on the back surface of the case, the tip of the pressure-sensitive plate is folded upward and the tip projects from the surface of the case, and the switch hole portion is bulged outward. By covering the case surface with the decorative cover and pressing the bulging portion of the decorative cover, the plate spring is pressed via the pressure-sensitive plate. It is characterized by being pressed.

[Operation] By pressing the plate spring, the plate spring is deformed, and the protrusions formed on the plate spring press the tangential patterns on the upper and lower sides of the wiring sheet to make an electrical connection.

When the pressing force is removed from the plate spring, the plate spring returns to the disconnected state due to the restoring force of the plate spring.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 shows the appearance of a card-type electronic device 10 according to the present invention.

In the figure, 11 is a case body, 12 is a display unit, and 13 is a switch.

 The details will be described below with reference to FIGS.

The case body 11 has a concave portion 14 formed from the back side,
The bottom of the case body 11 is a panel part 15 on the front side.
The panel section 15 lacks a range including the switch 13 and the display section 2.

A printed wiring board 16 is provided on the back side of the panel unit 15, an antenna plate 17 of a metal plate constituting a part of the case is provided on the front side, and further, a switch display and the like are printed on the surface of the antenna plate 17. The bent flexible decorative cover 18 is attached. The antenna plate 17 has a rectangular switch hole.
19 are drilled.

On the front side of the printed wiring board 16, the switch hole
A switch unit 20 is provided so as to face 19, and a pressure-sensitive plate 21 having both ends extending to the switch hole 19 is attached to the back side of the antenna plate 17. Further, the switch portion 22 of the decorative cover 18 is slightly expanded, and a gap 28 is formed between the switch portion 22 and the pressure-sensitive plate 21.

 Next, the switch unit 20 will be described.

The switch unit 20 has two or two folded wiring sheets 23 as shown in FIG. 5, and a bent side of the wiring sheet 23 away from the wiring sheet 23, and further a projection 24 toward the wiring sheet 23 at the center.
Formed of a plate spring 25. Also, a wiring pattern to be tangent to the surfaces of the wiring sheets 23 facing each other.
26, 27 (the upper wiring pattern 26 in FIG. 4 is shown by a solid line, and the lower wiring pattern 27 is shown by a broken line), and the wiring pattern 27 is connected to the pattern of the printed wiring board 16. Is done. By pressing the plate spring 25 and returning the plate spring 25, the protrusion
24 presses the opposing portions of the wiring patterns 26 and 27 to electrically connect them.

The pressure-sensitive plate 21 is made of a suitable elastic material, for example, a synthetic resin, and has a tip bent upward.
By this folding, the gap corresponding to the thickness of the antenna plate 17 is filled without difficulty, and the small gap 28 is formed between the antenna plate 17 and the decorative cover 18.

The pressure-sensitive plate 21 and the plate spring 25 may be in contact with each other, or a gap may be formed.

 Hereinafter, the operation will be described.

When the switch section 22 of the decorative cover 18 is pressed, the switch section
22 is first depressed by the gap 28, and then deforms the plate spring 25 while the pressure-sensitive plate 21 is bent. When the plate spring 25 bends to some extent, the force required for deformation decreases and the plate spring 25 returns,
The protrusions 24 press the wiring patterns 26 and 27 of the wiring sheet 23 to make electrical contact.

Until this electrical contact, the depression of the gap 28 and the deformation of the plate spring 25 until it returns have a sufficient stroke to give a feeling of operation and reduce the force in the return operation of the plate spring 25. Gives the operator a feeling of switch operation completion.

It is needless to say that when the pressing force to the switch section 22 is released, the plate spring 25, the pressure-sensitive plate 21, and the decorative cover 18 are restored to their original state by their respective elasticity.

[Effects of the Invention] As described above, the present invention exerts an excellent effect of giving a sufficient operational feeling to a manipulator since it has an appropriate repulsive force and stroke.

[Brief description of the drawings]

FIG. 1 is an overall perspective view of a card-type electronic device provided with the thin switch according to the present invention, FIG. 2 is a view taken on line AA of FIG. 1, FIG. 3 is a rear view of a case body, and FIG. FIG. 5 is an explanatory view of the switch unit, FIG. 5 is a cross-sectional view in which the shape in the direction of arrows CC in FIG. 4 is exaggerated, and FIG. 6 is a cross-sectional view showing a conventional example. 11 is a case body, 16 is a printed wiring board, 17 is an antenna plate, 20 is a switch unit, 21 is a pressure-sensitive plate, 23 is a wiring sheet, 24 is a projection, 25 is a plate spring, 26, 27
Indicates a wiring pattern.

──────────────────────────────────────────────────続 き Continuing on the front page (72) Motoi Sato 1-6-6 Uchisaiwaicho, Chiyoda-ku, Tokyo Nippon Telegraph and Telephone Corporation (72) Yoshinobu Nakamura 1-16-1 Uchisaiwaicho, Chiyoda-ku, Tokyo Japan Within Telegraph and Telephone Co., Ltd. (56) References: Japanese Utility Model Application Sho 61-49926 (JP, U) (58) Fields investigated (Int. Cl. ⁶ , DB name) H01H 13/00-13/76

Claims (1)

(57) [Scope of request for utility model registration] An upper and lower pair of wiring sheets provided on a printed wiring board, a connection pattern printed on opposing surfaces of the wiring sheet, and the connection pattern connected to the printed wiring board; A curved plate spring having a protrusion on the wiring sheet side is provided on the sheet, a switch hole is formed in a portion corresponding to the plate spring of a case for housing a printed wiring board, and a pressure-sensitive plate extending to the upper side of the plate spring is provided. Provided on the back of the case, the tip of the pressure-sensitive plate is folded upward and the tip protrudes from the case surface, and the case surface is covered with a flexible decorative cover in which the switch hole portion swells outward, The plate spring is pressed via the pressure-sensitive plate by pressing a bulging portion of the decorative cover. Flat-panel switch.