JPH07263042A - Operation device for electronic equipment - Google Patents

Abstract

PURPOSE:To prevent static electricity from entering an internal circuit through an operating electronic part or the like even if it is a structure that the static electricity easily enters from a part of an operation member in an operation device for an electronic equipment. CONSTITUTION:Spaces A and B are formed around a pressing part 8b situated in front of a circuit board 3, and are set so that static electricity easily directly enters the circuit board 3 from the periphery of an operation button 9. Here, a tact switch 5 and a connector pin or the like are covered with an insulating sheet 21, and only an earth pin 7a of the connector pin 7 is exposed from a hole 21e of this insulating sheet 21. Thereby, the static electricity is not transmitted to the tact switch 5 or the like, and is actively introduced to the connector pin 7, and is released to an earth part.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention operates operation electronic parts such as a tact switch and a volume provided inside the operation surface by an operation member arranged on the operation surface such as an on-vehicle audio equipment. The present invention relates to an electronic device operating device, and more particularly to an electronic device operating device in which static electricity applied to an operating surface or an operating member is prevented from being transmitted to a circuit portion via an operating electronic component or the like.

[0002]

2. Description of the Related Art FIG. 6 is a sectional view showing a portion of an operating device for an on-vehicle audio equipment. An operating device called a nose portion is provided in front of the on-vehicle audio equipment. In FIG. 6, a surface cover of the operating device is indicated by reference numeral 1. The front surface of the front cover 1 is an operation surface 1a. A main circuit board 2 is arranged inside the front cover 1. Main circuit board 2
A circuit board 3 which is a small board is provided in front of the circuit board 3, and the circuit board 3 is fixed to the main circuit board 2 by columns 4 and 4. Tact switches 5 and 5 are mounted as operation electronic components at positions A and B on the circuit board 3, and push buttons 5a and 5a of the tact switches 5 and 5 are directed to the front cover 1. An illumination lamp 6 is mounted on the circuit board 3, and the illumination lamp 6 is covered with a colored cover. The main circuit board 2 and the circuit board 3 are connected by a plurality of connector pins 7, and the conductive patterns of the two circuit boards 2 and 3 are conducted by the connector pins 7.

A light guide member 8 made of a translucent resin material is arranged between the surface cover 1 and the circuit board 3. The lamp 6 is inserted into the recess 8 a of the light guide member 8. The colored light emitted from the lamp 6 is guided by the light guide member 8 and the operation buttons 9 and 10 arranged on the operation surface 1 a of the front cover 1 are back-illuminated, and the operation surface 1 is further illuminated.
The display part provided in a is back-illuminated. Operation button 9
Holes C and D are formed in the front cover 1 in order to arrange 10 and 10. The operation button 9 attached to the hole C is the operation surface 1a.
Is inserted into the hole C from the front, and the nail 9a is attached by being hooked on the back surface of the front cover 1. Behind the operation button 9, there is provided a pressing portion 8b formed by a part of the light guide member 8 so as to be movable back and forth via an elastic arm, and the pressing portion 8b is at the position A. It faces 5a. When the operation button 9 appearing on the operation surface 1a is pressed, the push button 5a is pressed via the pressing portion 8b.

An operation button 10 is arranged in the hole D of the front cover 1. A biasing member 11 is integrally fixed to the back surface of the operation button 10. The urging member 11 is formed of a highly transparent and light-transmissive resin material, and the operation button 1
0 is fixed to the front surface of the urging member 11 by means such as fitting, press-fitting or adhesion. A collar 11 a formed by a part of the biasing member 11 is formed around the base end of the operation button 10. The operation button 10 is provided from the inside of the front cover 1 with the hole D
The collar 11a hits the back surface of the front cover 1 to prevent the operation button 10 from slipping forward. The biasing member 11 is integrally formed with a pillar 11c fixedly fitted into a protrusion protruding from the inner surface of the surface cover 1 and fixed, and an elastic arm 11d extending from the pillar and elastically supporting the push button 10 elastically. ing. A pressing pin 11b is integrally formed on the back surface of the biasing member 11.
b passes through the hole 8e formed in the light guide member 8 and
It opposes the push button 5a of the tact switch 5 at the position. The operation button 10 is operated by the elastic force of the elastic arm 11d.
When the operation button 10 is pressed because it is biased in the direction of a,
The push pin 11b moves inward against the biasing force, and the push button 5a is pushed.

[0005]

In this type of operating device, when operated with a finger or the like that is charged with static electricity, the static electricity is applied to the conductive portion of the circuit board 3, the tact switch 5 itself or the terminals of the tact switch 5. There is a problem that it is transmitted to, for example, an IC mounted on the main circuit board 2 and other electronic elements, and these electronic elements are destroyed. When the operation button on the operation surface 1a is touched by an electrostatically charged hand or the like, the static electricity enters through the gap formed in the operation device and is transmitted to the conductive portion of the circuit board or the terminal of the tact switch.
Therefore, when looking at the operating device shown in FIG.
Static electricity tries to enter through the gap between the outer periphery of the hood and the hole D of the surface cover 1, but the collar 11a of the urging member 11 is behind it.
Since these are overlapped, this collar 11a prevents static electricity from entering. Further, a hole 8e is formed in the light guide member 8 located behind the urging member 11, but the urging member 11 is arranged in front of the hole 8e. Therefore, it is difficult for static electricity to be directly transmitted from the hole 8e toward the circuit board 3. In this way, static electricity is less likely to be directly transmitted from the portion of the operation button 10 to the surface of the circuit board 3 and the tact switch 5.

On the other hand, in the case of the operation button 9 provided on the upper side of the drawing, when static electricity enters from the gap between the outer circumference of the operation button 9 and the hole C, the surroundings of the pressing portion 8b located behind it. Since the space (a) due to the notch of the conductive member 8 and the space (b) above the pressing portion 8b are open, static electricity is easily transmitted directly to the circuit board 3 from these spaces (a) and (b). ing. Therefore, the static electricity easily propagates through the conductive pattern on the surface of the circuit board 3 or the terminals of the tact switch 5 into the circuit. In particular, in the conventional example shown in FIG. 6, since the tip of the connector pin 7 appears in the portion where the space (b) is formed, static electricity directly reaches the connector pin 7 and the circuit of the main circuit board 2 remains as it is. The ICs, electronic elements, etc. mounted on the main circuit board 2 are easily destroyed by being transmitted to the parts.

The present invention solves the above-mentioned conventional problems. Even if the static electricity easily enters inside from the operation side, it is possible to avoid destruction of circuit components due to static electricity. It is intended to provide an operating device of

[0008]

In an operating device for electronic equipment according to the present invention, an operating member is arranged on an operating surface, and an operating electronic component operated by the operating member is provided on a substrate located inside the operating surface. In an operating device of an electronic device in which a mounted board is arranged, an insulating sheet is provided between the operating member and the operating electronic component, and the insulating sheet exposes a ground portion on the board. It is characterized in that a notch or a hole is formed.

Further, when the substrate is provided with a connector pin projecting in the direction of the operation surface, it is preferable that the ground pin among the connector pins is exposed from the notch or hole of the insulating sheet.

[0010]

In the above means, when the mounting structure of the operating member or the internal structure of the operating member arranged on the operating surface is such that static electricity can easily be allowed to enter, static electricity that has been given from a finger or the like and has entered from around the operating member is Attempts to reach the conductive parts of the board or the terminals of the operating electronic components.
However, since the operating electronic component, more preferably the operating electronic component and its surroundings are covered with the insulating sheet, static electricity is less likely to be transmitted to the operating electronic component and the conductive parts around it. Moreover, since the ground portion is exposed in the notch or hole formed in the insulating sheet, static electricity is easily guided to this ground portion. Since the static electricity is positively guided to the ground portion and can be released through the ground portion, it is possible to prevent the ICs and electronic elements in the circuit from being affected by the static electricity.

In particular, when the board is provided with a connector pin, if the ground pin of this connector pin is exposed from the notch or hole of the insulating sheet and the static electricity is guided to the ground pin, the static electricity will be applied to other connector pins. Can be prevented from being transmitted. Further, since the connector pin includes the ground pin, it is not necessary to specially provide a ground portion for releasing static electricity. In particular, in the case of a grounding part having a sharp tip such as a grounding pin, the static electricity is positively received, and the static electricity is easily released to the grounding part.

However, the grounding portion is not limited to the use of the connector pin, and the pin is extended from the grounding conductive portion of the substrate to a position where static electricity easily enters, and the tip of this pin is exposed from the notch or hole of the insulating sheet. May be. Alternatively, the conductive pattern for grounding of the circuit board may be provided with a solder swell or the like, and the earth swell may be exposed from the notch or hole of the insulating sheet.

Further, the most preferable structure for exposing the ground portion from the cutout or hole of the insulating sheet is to project the ground pin or another ground portion from the cutout or hole in the operation surface direction. However, even if the grounding part is at a position slightly retracted in the board direction from the cutouts or holes,
Static electricity easily passes through the cutouts or holes in the insulating sheet and is easily transmitted to the grounding section, so a sufficient effect is obtained.

[0014]

Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is a partially exploded perspective view showing an operating device for an on-vehicle audio equipment as an example of an operating device for electronic equipment, FIG. 2 is a partial front view taken along the arrow II in FIG. 1, and FIG. FIG. 4, FIG. 4 is an enlarged sectional view taken along line IV-IV of FIG. 1, and FIG. 5 is a partial perspective view showing a mounting state of the insulating sheet. As is clear from the comparison between FIG. 4 and FIG. 6 described in the conventional example, the basic structure of the operating device for the on-vehicle audio equipment shown in the following examples is:
This is the same as the conventional example shown in FIG. 1 and 4, reference numeral 1 is a surface cover of the operating device, and the front surface thereof is the operating surface 1a. The operation surface 1a is formed so as to be raised in front of the surface cover 1, and has a hole C at the top thereof.
Has a hole D at the bottom and holes E, E at both sides of the ridge.
Is open. An operation button 9 which is an operation member is attached to the hole C. On both sides of the operation button 9, elastically deformable claws 9a, 9a are formed. When the operation button 9 is inserted into the hole C from the front side of the operation surface 1a, the claws 9a and 9a are hooked on the inner surface of the hole C, whereby the operation button 9 is attached. In FIG. 6, the claw 9a appears on the lower side of the drawing,
For convenience of illustration, the claw 9a is shown downward.

Three operation buttons 10 are attached to the hole D. A biasing member 11 formed of a translucent and highly elastic resin material is integrally fixed to the rear end of each operation button 10. The biasing member 11 is integrally formed with three pillars 11c fixed to the inner surface of the surface cover 1 by concavo-convex fitting and elastic arms 11d extending from the pillars 11c. It is elastically supported by the elastic arm 11d. A brim 11a formed by the biasing member 11 is provided around the proximal end of each operation button 10. The operation button 10 is inserted into the hole D from the inside of the front cover 1 so that the brim 11a contacts the inner surface of the front cover 1. It is like this. Also, the biasing member 1
1 is provided with a pressing pin 11b integrally extending rearward. A light guide member 8 is provided inside the front cover 1. The light guide member 8 is made of a translucent resin material. The light guide member 8 is formed with three holes 8e. As shown in FIGS. 4 and 6, the pressing pin 11 b extending from the biasing member 11 integrated with the operation button 10 is inserted into each hole 8 e of the light guide member 8.

A pressing portion 8b shown in FIGS. 4 and 6 is formed on the light guide member 8. As shown in FIG. 2, the pressing portion 8b is formed integrally with the light guide member 8. The pressing portion 8b is an elastic arm 8 extending from the main body of the light guide member 8.
The pressing portion 8 is formed integrally with the tip of g.
b can be elastically moved back and forth by the deformation of the elastic arm 8g. As shown in FIG. 2, a space (a) is formed on the lower side of the pressing portion 8b, and a space (b) is formed on the upper side. Spaces (c) are formed on the left and right sides of the pressing portion 8b. As shown in FIGS. 4 and 6, the operation button 9 is located in front of the pressing portion 8b. The main circuit board 2 is provided behind the light guide member 8,
A circuit board 3, which is a small board, is fixed to the front of the circuit board by a pillar 4. The circuit board 3 is located inside the raised portion in front of the surface cover 1, that is, inside the operation surface 1a. On the front surface of the circuit board 3, one tact switch 5 is fixed at the position A, and three tact switches 5 are fixed at the position B. In this embodiment, the tact switch 5 is an operation electronic component. The terminals of the tact switch 5 are soldered to the conductive pattern formed on the circuit board 3. As shown in FIGS. 4 and 6, the push button 5a of the tact switch 5 in the A position is pressed by the operation button 9 via the pressing portion 8b. Pushbutton 5 of the three tact switches in position B
A is pressed by the pressing pin 11b of the biasing member 11.

At the central portion of the circuit board 3, three lamps 6 are provided.
Is provided. The lamp 6 is covered with a colored cover. As shown in FIGS. 4 and 6, the lamp 6 is inserted into each recess 8 a of the light guide member 8. A plurality of connector pins 7 are provided between the main circuit board 2 and the circuit board 3. The conductive pattern of the main circuit board 2 and the conductive pattern of the circuit board 3 are electrically connected by the plurality of connector pins 7. The tip of each connector pin 7 extends from the circuit board 3 toward the surface cover 1, and the tip is electrically connected to the conductive pattern of the circuit board 3 by the solder H. The ground pin 7a is located on the rightmost side in FIG. 1 among the plurality of connector pins 7.

An intermediate support member 15 is fixed between the main circuit board 2 and the circuit board 3. This intermediate support member 1
On the front surface of 5, a rotation operation arm 16 is provided,
The rotation operation arm 16 appears in the hole E formed in the front cover 1. The rotary operation arm 16 is used, for example, for volume adjustment. 1, 3, and 4
As shown in FIG. 5 and FIG. 5, in the embodiment of the present invention, between the front surface of the tact switch 5 provided on the portion A of the circuit board 3 and the surface cover 1, more specifically, the tact switch 5 of the circuit board 3 is provided. An insulating sheet 21 is interposed between the light guide member 8 and the mounting portion and its surroundings. The insulating sheet 21 is made of a material such as vinyl chloride and has a thickness having a certain degree of rigidity.
Moreover, it is a flexible sheet.

At the base of the insulating sheet 21, there is provided a support piece 21a which is bent and formed at the bent portion La. As shown in FIG. 4, a plurality of small holes are formed in the support piece 21a, and the plurality of connector pins 7 are inserted into the small holes on the main circuit board 2 side. By inserting the connector pin 7 into this small hole, the support piece 21
a is supported on the main circuit board 2 side. Alternatively, the base end of the insulating sheet 21 may be adhered to the side surface of the connector pin 7, the side surface of the intermediate support member 15, or the like. Support piece 21a
It is the extending piece 21b that is continuous with. As shown in FIG. 4, the extension piece 21b passes through the hole 15a formed in the intermediate support member 15 and extends forward, and its tip portion extends forward from the side edge of the circuit board 3. A covering piece 21c is provided at the tip of the extending piece 21b and is bent and formed by the bending portion Lb. As shown in FIG. 5, the covering piece 21c is installed on the front surface of the circuit board 3,
The covering piece 21c has an area which can cover the tact switch 5 at the position A and can sufficiently cover the left and right regions of the tact switch 5. A pair of extension pieces 21d and 21d extend to the tip of the covering piece 21c, and the extension pieces 21d and 21d extend to positions where both sides of the central lamp 6 are covered. That is, on the front surface of the circuit board 3, the insulating sheet 21 covers the tact switch 5, the left and right regions thereof, and the regions on both sides of the central lamp 6.

A pressing hole 21h is formed in the illustrated right end portion 21f of the covering piece 21c. The screw 22 inserted in the holding hole 21h is screwed into the circuit board 3 to
The right end 21f is pressed so as to come into close contact with the front surface of the circuit board 3. Further, the illustrated left end portion 21g of the covering piece 21c is fixed to the surface of the circuit board 3 by a double-sided adhesive tape or the like. As a result, the covering piece 21c covers the tact switch 5 and both ends 21f and 21g thereof are in close contact with the circuit board 3. Both the right end 21f and the left end 21g of the covering piece 21c may be fixed to the circuit board 3 by screws, or the right end 21f of the covering piece 21c.
Both the left end portion 21g and the left end portion 21g may be fixed to the surface of the circuit board 3 by a double-sided adhesive tape. The cover piece 21c is provided with a hole 21e. The connector pin 7 is laterally covered with the extending piece 21b, and the tip of each connector pin 7 is covered with a covering piece 21c. However, only the ground pin 7a of the connector pin 7 has the hole 2
It is exposed from 1e. As shown in FIG. 4, ground pin 7
The tip of a projects slightly from the hole 21e toward the surface cover 1, or the tip of the ground pin 7a extends to almost the same position as the surface of the covering piece 21c.

As described in the conventional example of FIG. 6, in the operating device of this structure, static electricity easily enters inside from the position of the operating button 9. That is, when an electrostatically charged finger or the like touches the operation button 9, the hole C in the front cover 1
Static electricity enters through the gap between the control button 9 and the operation button 9, and further directly enters the circuit board 3 from the spaces (a), (b), and (c) around the pressing portion 8b shown in FIG. However, the circuit board 3 has the covering piece 21c of the insulating sheet 21 inside the area where static electricity enters through the spaces (a), (b), and (c).
Are covered by. Therefore, the static electricity is not transmitted to the tact switch 5 itself covered with the covering piece 21c, the terminal portion of the tact switch 5, or the conductive portion of the circuit board 3 provided around the tact switch 5. In particular, both ends 21f and 21 of the covering piece 21c that covers the tact switch 5 are
Since g is in close contact with the surface of the circuit board 3 and the tact switch 5 is covered with the covering piece 21c, static electricity is less likely to be transmitted to the tact switch 5 and its peripheral portion. Moreover, since the ground pin 7a of the connector pin 7 is exposed in the hole 21e formed in the covering piece 21c of the insulating sheet 21, the tip of the ground pin 7a functions like a lightning rod, and static electricity is located at the position of the hole 21e. Positively guided to the ground pin 7a and escaped to the ground section.

The tip of the connector pin 7 is provided at a position close to the space (b), but all the connector pins 7 other than the ground pin 7a are covered with the covering piece 21c, and all the connectors are also covered. The lateral side of the pin 7 is covered from the lateral side by the extending piece 21b of the insulating sheet 21. Therefore, there is no concern that static electricity will be transmitted to the connector pins 7 other than the ground pin 7a. That is, space (b)
Since the ground pin 7a of the connector pin 7 is exposed to the rear of the, the static electricity from the operation button 9 is easily guided to the ground pin 7a through the space (b). This also makes the internal circuit less susceptible to static electricity.
Further, since the insulating sheet 21 is flexible, the push button 5a of the tact switch 5 at the position A can be pressed even if the covering piece 21c is present. When the operation button 9 is pressed, the pressing portion 8b elastically moves inward, and the pressing button 5a is pushed through the covering piece 21c.
Will be pressed.

In the above embodiment, a space ((a) or (b) or (c)) is formed laterally in front of the board on which the tactile switch 5 which is an operation electronic component is mounted, and the elastically moving pressure is applied. The portion 8b is provided, and the operation surface 1a in front of the portion 8b is provided.
Alternatively, in an operating device of an electronic device in which an operation member (operation button 9) for pressing the operation electronic component via the pressing portion 8b is provided in the operation portion, flexibility is provided between the operation electronic component and the pressing portion. The insulating sheet 21 is interposed. Further, in the above description, a plurality of connector pins 7 connected to other circuit parts are provided on the substrate together with the operation electronic component, and the operation electronic component and the tip of the connector pin are covered with the insulating sheet 21. Only the ground pin 7a of the connector pin 7 is exposed from the hole or notch formed in the insulating sheet.

Further, the insulating sheet covers the operation electronic components and the tips of the connector pins, and both sides of the insulating sheet are in close contact with the surface of the substrate. Since the operating electronic component and the connector pin are covered with the insulating sheet, static electricity cannot enter the operating electronic component and the connector pin at all. It should be noted that the insulating sheet 21 may be provided with a notch that is recessed from the edge of the sheet instead of the hole 21e, and a ground pin or the like serving as a ground portion may be exposed in this notch. In addition to the tact switch, the operation electronic component may be a leaf switch in which the contact of the elastic piece is exposed, or a variable resistor. The operating device for the electronic device is not limited to the on-vehicle audio device, but may be another on-vehicle electronic device or an operating device for home or office electronic devices.

[0025]

As described above, according to the present invention, static electricity can be prevented from entering the circuit through the operating electronic parts and other conductive parts. In particular, since the ground portion is provided in the hole or notch formed in the insulating sheet, the static electricity that has entered the operating device is positively released by the ground portion.

Further, by using the connector pin as the grounding portion, it is not necessary to specially provide a grounding portion for releasing static electricity, and the structure is simplified.

[Brief description of drawings]

FIG. 1 is a partially exploded perspective view showing an operating device for an on-vehicle audio device according to an embodiment of the present invention;

FIG. 2 is a partial front view taken along the arrow II of FIG.

FIG. 3 is a partial front view taken along the arrow III in FIG.

FIG. 4 is an enlarged sectional view taken along line IV-IV of FIG.

FIG. 5 is a partial perspective view showing a state in which an insulating sheet is installed on a circuit board,

FIG. 6 is a partial cross-sectional view of a conventional operating device for an on-vehicle audio device,

[Explanation of symbols]

 1 Front Cover 1a Operation Surface 2 Main Circuit Board 3 Circuit Board 5 Tact Switch 5a Push Button 6 Lamp 7 Connector Pin 7a Earth Pin 8 Light Guide Member 8b Pressing Section 9, 10 Operation Button 11 Energizing Member 21 Insulating Sheet

Claims (2)

[Claims] 1. An operating device for an electronic device, wherein an operation member is arranged on an operation surface, and a board on which an operation electronic component operated by the operation member is mounted is arranged on a board located inside the operation surface. In, an insulating sheet interposed between the operating member and the operating electronic component is provided, and the insulating sheet has a notch or a hole for exposing a ground portion on the substrate. Electronic device operating device. 2. The operation of the electronic device according to claim 1, wherein the board is provided with a connector pin protruding toward the operation surface, and a ground pin of the connector pin is exposed from a notch or a hole of the insulating sheet. apparatus.