JPH0555423U - Knob mechanism - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a knob mechanism for an electronic device that can reduce the depth of the panel. [Structure] The knob 2 provided on the panel 1 is configured to give a feeling when pressed by an elastic member 6 supported by a film 5. The edge of the hole 5a of the film 5 is fixed in close contact with the upper surface of the tact switch 4 attached to the printed circuit board 3. Push knob 2 to guide the light
The tact switch 4 is activated by the end of 2c.

Description

[Detailed description of the device]

[0001]

[Industrial application]

 The present invention relates to a push knob for operating an electronic device, and particularly to a knob mechanism suitable for space saving.

[0002]

[Prior art]

 Conventionally, a knob mechanism for electronic equipment as shown in FIG. 3 has been provided.

In the figure, reference numeral 3 is a printed circuit board, and six illumination type tact switches 4 each having a built-in LED are fixed in correspondence with a push knob.

Reference numeral 11 denotes a panel on the operation surface of the electronic device, and six holes 11a through which the knobs are inserted and supported are provided as in FIG.

Reference numeral 12 is a push-type knob for operation, which is formed of a light-transmitting member, has a top 12a and a collar 12b on which characters are printed, operates the tact switch 4, and guides light from the tact switch 4. It is configured by the light guide section 12c. Reference numeral 13 denotes a metal plate, which is attached with a predetermined distance from the tact switch 4, supports an elastic member, and is electrically connected to the main body so that the printed circuit board 3 is electrically connected to a conductive pattern (not shown). We are doing electrical shielding. Reference numeral 13a is a hole through which the light guide portion 12c is inserted. Reference numeral 14 denotes an elastic member, which gives a feeling when the knob 12 is pushed.

The operation and action of the conventional knob mechanism configured as described above will be described. The light emitted from the illuminated tact switch 4 is guided by the light guide portion 12c of the knob 12 and illuminates the letters on the top portion 12a.

When the knob 12 is pushed, the tact switch 4 is operated by the end portion of the light guide portion 12c. Along with this, the elastic member 14 is compressed by the collar 12b. When the knob 12 is released, the knob 12 is returned by a spring member (not shown).

[0008]

[Problems to be solved by the device]

 However, in the above-mentioned conventional knob mechanism, the metal plate has to be electrically connected to the chassis of the main body or the like in order to exert the effect of the electrostatic shield, so the shape is complicated and the cost is high.

Further, since the metal plate is thick and fixed away from the tact switch, the thickness of the knob assembly becomes thick and the depth of the panel becomes large.

The present invention has been made in view of the above points, and an object thereof is to provide a knob mechanism that can solve the drawbacks of the conventional example and reduce the depth of the panel.

[0011]

[Means for Solving the Problems]

 The knob mechanism of this invention pushes the knob on the panel surface with the switch mounted on the printed circuit board, the knob provided on the panel surface for activating the switch, and the elastic member for urging the knob toward the panel surface. In the knob mechanism of the electronic device, which is configured so that when the switch is actuated and the switch is released, the knob is brought into contact with the upper end of the switch, and an insulating sheet member is attached. It is configured to support the elastic member.

[0012]

[Action]

 According to this invention, the edge of the hole provided in the insulating sheet member is brought into contact with the upper end portion of the tact switch attached to the printed circuit board to attach the sheet member, and the elastic member is attached by the sheet member. Because it is supported, the thickness of the knob assembly is reduced.

[0013]

Embodiment An embodiment of the knob mechanism according to the present invention will be described with reference to FIGS. The same parts as those of the conventional example are designated by the same reference numerals and the description thereof will be omitted.

FIG. 1 is a side sectional view of the knob mechanism, and FIG. 2 is a front view of the knob mechanism.

In FIG. 1, reference numeral 1 denotes a panel on the operation surface of an electronic device, which has six holes 1a through which a knob is inserted and supported.

Reference numeral 2 denotes a push-type knob for operation, which is formed of a light-transmitting member, operates the top 2a and the collar 2b on which characters are printed, and activates the tact switch 4 and guides the light from the tact switch 4. It is composed of a light guide portion 2c.

Reference numeral 5 denotes a synthetic resin film, which is an insulating sheet member. It is fixed. Reference numeral 6 denotes an elastic member having a cushioning action, which gives a feeling when the knob 2 is pressed and is fixedly adhered onto the film 5.

The operation and action of the knob mechanism of the present invention constructed as above will be described. The light emitted from the illuminated type tact switch 4 is guided by the light guide portion 2c of the knob 2 and illuminates the characters (1 to 6 in FIG. 2) printed without the letters on the top portion 2a.

When the knob 2 is pushed, the tact switch 4 is activated by the end of the light guide portion 2c. At the same time, the elastic member 6 is compressed by the brim 2b, giving the knob a pleasant feel. When the knob 2 is released, the knob 2 is slid to the left in FIG. 1 by a spring member (not shown) and returns to the original position.

Further, on the printed circuit board 3, the edges of the six holes 6a provided in the film 5 are brought into contact with the upper end (face in the knob direction of FIG. 1) end of the tact switch 4 so that static electricity is generated from the gap. It is designed not to jump in.

[0021]

[Effect of the device]

 Since the knob mechanism according to the present invention is configured as described above, the synthetic resin film can prevent static electricity from jumping in, so that a metal plate is not required and a significant cost reduction can be achieved.

Since the above film is thin and fixed in close contact with the upper surface of the tact switch, the thickness of the knob assembly can be reduced to save space and reduce the depth of the panel.

Since the depth of the panel becomes small, the appearance becomes beautiful.

[Brief description of drawings]

FIG. 1 is a side sectional view showing a knob mechanism of the present invention.

FIG. 2 is a front view showing the knob mechanism.

FIG. 3 is a side sectional view showing a knob mechanism of a conventional example.

[Explanation of symbols]

 1 panel 1a hole 2 knob 2a top 2b flange 2c light guide 3 printed circuit board 4 tact switch 5 film 5a hole 6 elastic member

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification code Office reference number FI technical display location H05F 3/02 S 7028-5G

Claims (1)

[Scope of utility model registration request] 1. A switch mounted on a printed circuit board, a knob provided on the panel surface for activating the switch, and an elastic member for urging the knob toward the panel surface, by pressing the knob on the panel surface. In a knob mechanism of an electronic device, which is configured so that the knob returns when the switch is actuated and released, an insulating sheet member is attached by making contact with the upper end of the switch, and the elastic member is supported by the sheet member. A knob mechanism having the above-mentioned configuration.