JPH065408A - Electronic equipment and part - Google Patents

Abstract

PURPOSE:To prevent the light from a light emission source to be filtered out without using a flare stopping wall. CONSTITUTION:A flare stopping elastic sheet member 6 provided with through holes 6a corresponding to panel through holes 2 bored in the panel sheet 1 of an electrode equipment is fixed to the upper wall part 51a of the case main body 51 of a sliding variable resistor 5. Next, the flare stopping elastic sheet member 6 is pressed down by the depressing protrusions 1a provided on the panel sheet 1 as if encircling the panel through holes 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic device having a panel section having a display section illuminated by light emitted from a light emitting source disposed inside a case, and an electronic component used in the electronic apparatus.

[0002]

2. Description of the Related Art In a vehicle audio and electronic device such as a car stereo, a light emitting source such as a lamp is arranged inside a case to make it easier to see the display at night and to easily understand the position of a switch. It is widely practiced to irradiate the light emitting portion provided in the. In order to prevent light from a light emitting source arranged inside the case from leaking to a portion other than a portion where illumination is required, conventionally, as shown in FIG. 5, a light shielding wall 102 is provided inside a case 101 of an electronic device. It was Shading wall 1
When 02 is not provided, the slide type variable resistor 103
Panel part 1 for projecting the operation member 104 of electronic parts such as
The light from the light emission source 107 leaks from the through hole 106 of 05.

[0003]

However, the light shielding wall 1
If the mounting of 02 is improper, or the processing accuracy of the light shielding wall 102 is poor, the problem of insufficient light shielding may occur. Further, depending on the structure of the case, it may not be possible to provide the light shielding wall. Further, if the light shielding wall cannot be provided integrally with the case due to the structural relationship, the light shielding wall will be provided as a separate component, and there is a problem that the assembly of the electronic device is troublesome.

An object of the present invention is to provide an electronic device capable of blocking light from a light emitting source without using a light blocking wall.

Another object of the present invention is to provide an electronic device which can be easily assembled.

Still another object of the present invention is to provide an electronic component suitable for use in an electronic device which can shield light from a light emitting source without using a light shielding wall.

[0007]

According to a first aspect of the present invention, a panel portion has a light emitting portion which emits light when illuminated by light from a light source disposed inside the case, and at least one operating member is provided. An electronic device in which an electronic component protruding from a panel through hole formed in a panel portion is arranged inside a case is targeted for improvement.

According to the first aspect of the invention, the light-shielding elastic sheet member having the through hole corresponding to the panel through hole is sandwiched between the case body of the electronic component and the panel portion. The light-shielding elastic sheet member does not have to be fixed in particular, but when it is fixed, it may be fixed to either the case body or the panel portion of the electronic component. In order to enhance the light shielding performance obtained by compressing the light shielding elastic sheet, the compression force of the light shielding elastic sheet may be increased. For that purpose, for example, a means for pressing the light shielding elastic sheet may be provided on either the case body or the panel portion.

According to the second aspect of the present invention, the light-shielding elastic sheet member is fixed to the outer surface of the case body of the electronic component, and the panel is provided with the pressing convex portion for pressing around the through hole of the light-shielding elastic sheet member. .

According to the third aspect of the present invention, a gap is formed between the case body of the electronic component and the light shielding elastic sheet member at a position corresponding to the pressing convex portion.

According to a fourth aspect of the present invention, as the electronic component, the case main body has an opening shape having an opening at a portion facing the wall portion from which the operation member projects, and the case main body has an opening. Has a plurality of mounting legs that project in the direction opposite to the direction in which the operating member projects, and that has a circuit board on the surface that has the circuits necessary for electronic components so that the surface faces the inside of the case body. When the one fitted into the opening is used, light-shielding paint is applied to the back surface of the circuit board.

According to a fifth aspect of the present invention, as an electronic component used in the electronic device according to the first aspect, the operating member projects from a through hole for leading out the operating member provided in the case body, and the operating member leading through hole is provided on the outer surface of the case body. Provided is an electronic component to which an elastic sheet member having a through hole corresponding to a hole is fixed.

[0013]

When the light-shielding elastic sheet member having the through hole corresponding to the panel through hole is sandwiched between the case body and the panel portion of the electronic component, the panel through hole is surrounded by the through hole. The light shielding means can be formed by the light shielding elastic sheet member. Therefore, even if the light shielding wall is not provided or the light shielding wall cannot be provided, it is possible to prevent light from the light emitting source from leaking from the panel through hole.

By fixing the light-shielding elastic sheet member to the outer surface of the case body of the electronic component as in claim 2, the attachment of the light-shielding elastic sheet member can be completed at the manufacturing stage of the electronic component, and the electronic device can be mounted. Assembly is simple. When the pressing convex portion that presses the periphery of the through hole of the light shielding elastic sheet member is provided in the panel portion, the light shielding elastic sheet member is compressed so as to wrap around the tip end portion of the pressing convex portion, so that the pressing convex portion It is possible to form a light-shielding contact surface capable of reliably blocking light from the light emitting source on the contact surface between the light-shielding elastic sheet member and the light-shielding elastic sheet member.

When a gap is formed between the case body of the electronic component and the light-shielding elastic sheet member at a position corresponding to the pressing protrusion, the pressing protrusion is deformed. The amount of deformation of the light-shielding elastic sheet member can be increased, and the light-shielding contact surface can be formed more reliably.

When light shielding paint is applied to the back surface of the circuit board fitted in the opening of the case body of the electronic component, light leaking through the circuit board can be shielded.

When an elastic sheet member having a through hole corresponding to the operating member leading through hole is fixed to the outer surface of the case body as in the electronic component of the fifth aspect of the invention, the assembling work of the electronic device becomes easy.

[0018]

Embodiments of the present invention will now be described in detail with reference to the drawings. 1A and 1B are a schematic cross-sectional view in an intermediate step when assembling the electronic device of the embodiment and a cross-sectional view of a main part of the electronic device after assembly. See also FIG.
(A) and (B) are respectively perspective views of a main part of a slide type variable resistor as an example of an electronic component used in this embodiment. In these drawings, reference numeral 1 denotes a panel plate which constitutes a part of a case of an electronic device such as a stereo, and a panel portion of the panel plate 1 has a plurality of panel through holes 2 for projecting various switches. Alternatively, a light emitting portion (not shown) formed of a transparent or semi-transparent material that is illuminated by a light source such as a lamp or a light emitting diode disposed inside the case is provided. The light from the light emitting source is transmitted to the light emitting portion provided on the panel plate 1 through the light transmitting member such as transparent or translucent plastic. The panel plate 1 of this embodiment is integrally molded with a case body (not shown) from synthetic resin. A circuit board 3 on which various electronic components such as a light source and a switch are mounted is housed inside the case. Various electronic components are mounted on the front surface of the circuit board 3, and a copper foil circuit pattern is formed on the back surface thereof. Electrical connection of the electronic component to the copper foil circuit pattern is made through a through-hole conductor that penetrates the circuit board 3. In the state shown in the drawing, the circuit board 3 is formed with fitting holes 4 ... For fitting a mounting leg portion 55 of a slide type variable resistor 5 described later. Circuit board 3
Is attached to a wall portion (not shown) protruding from the back surface side of the panel plate 1 by using an appropriate attachment structure.

At the peripheral portion of the panel through hole 2 provided in the panel plate 1, there are annular pressing convex portions 1a ... Surrounding the panel through hole 2 and projecting toward the slide type variable resistor 5. It is molded integrally. This panel through hole 2 ...
Has a rectangular shape.

In the slide type variable resistor 5, a circuit board 52 is fitted into an opening of a case body 51 made of an insulating resin and having one end opening, and a plurality of sliders 53 are provided between the circuit board 52 and the case body 51. Is stored and configured. The slider 53 has an operating member 53a, and the operating member 53a
A light emitting portion 53a1 that is illuminated by a built-in light emitting diode and emits light is provided at the tip of the. The case body 51 is provided so as to surround an upper wall portion 51a in which a rectangular operation member lead-out through hole 51b through which the operation member 53a of the slider 53 is movably formed is formed, and the upper wall portion 51a. And a partition wall portion 51d connected to the upper wall portion 51a and the peripheral wall portion 51c to form a slider storage chamber inside the case body 51.
A plurality of projecting portions 54, the tip portions of which are deformed by heating after the plurality of mounting through holes formed in the circuit board 52 are fitted to the end portions on the opening side of the peripheral wall portion 51c and the partition wall portion 51d ... Is provided. Note that, in FIG. 1, these protrusions 54 ... Are shown in a state of being heated and deformed.

Mounting legs 55 ... Which extend in the direction opposite to the direction in which the operating member 53a of the slider 53 extends are integrally formed at the four corners of the peripheral wall 51c of the case body 51. These mounting leg portions 55 are fitted into the fitting holes 4 formed in the circuit board 3 and fixed to the circuit board 3. Needless to say, the mounting legs 55 may be brought into contact with the circuit board 3 without providing the fitting holes 4 ... As in the present embodiment. On the surface of the circuit board 52 fitted into the opening of the case main body 51, there are provided a variable resistor which comes into contact with a slider contact (not shown) provided on the sliders 53, and a circuit pattern connected to the variable resistor. Are formed. The circuit board 3 is not shown from the back surface of the circuit board 52.
The connection terminals connected to the circuit pattern of are protruding,
The connection terminals (not shown) are soldered to the circuit pattern on the back surface of the circuit board 3 through through holes (not shown) provided in the circuit board 3. In this embodiment, a light-shielding paint such as black paint is applied to the back surface of the circuit board 52 to form the light-shielding layer 56. The light shielding layer 56 has a small thickness and transmits a light coming from a light emitting source (not shown) to the inside of the case body 51 through a circuit board 52 which transmits light.
It is prevented that the operating member lead-out through holes 51b ... Leak out. By the way, examples of the circuit board that easily transmits light include circuit boards made of paper phenol, glass epoxy, and the like.

On the upper wall portion 51a of the case body 51,
The light-shielding elastic sheet member 6 made of a rubber cushion sheet having a rectangular through hole 6a having substantially the same dimensions as the operating member leading through hole 51b extends from the through hole 6a to the operating member leading through hole 51b. It is fixed in a state where it is arranged so as to match with. The light-shielding elastic sheet member 6 can be fixed by an appropriate fixing technique such as an adhesive, but in the present embodiment, the upper wall portion 51a can be heat-deformed as in the case of fixing the case main body 51 to the circuit board 52. Protrusion 51a2
And a plurality of through holes are formed in the light-shielding elastic sheet member 6 to allow the protrusions 51a2 to penetrate therethrough.
After fitting the through hole into the hole, the tip of the protrusion is heated and deformed to fix the light shielding elastic sheet member 6 to the upper wall portion 51a of the case body 51. The use of such a technique of deforming the protrusion by heating eliminates the need for a troublesome bonding work using an adhesive, and thus has an advantage of facilitating the manufacture of the slide type variable resistor.

An annular step 6b is formed on the surface of the light shielding elastic sheet member 6 on the side of the upper wall 51a so as to surround the through hole 6a and open to the side of the through hole 6a and the side of the upper wall 51a. Has been done. Due to the stepped portion 6b, a gap is formed between the case body 51 and the light shielding elastic sheet member 6 at a position corresponding to the pressing convex portion 1b. Figure 1 (A)
1 (the panel plate 1 is separated from the light-shielding elastic sheet member 6), the state of FIG. 1B (the panel plate 1 is pushed down so that the pressing convex portion 1b of the panel plate 1 has the light-shielding elastic sheet). When the member 6 is pressed, the light-shielding elastic sheet member 6 that is compressed and deformed surrounds the tip of the pressing convex portion 1b, and almost completely blocks the passage of light to the contact surfaces of both members. A light-shielding contact surface is formed. The gap may be formed by forming a step portion 51a1 on the upper wall portion 51a of the case body 51 of the slide type variable resistor 5 as shown in FIG. 3 and making the light shielding elastic sheet member 6 flat. .

In the above embodiment, the light emitting portion 53a1 is provided at the tip of the operating member 53a of the slider 53. Therefore, by providing the light shielding elastic sheet member 6 to exert the light shielding effect, the light emitting portion 53a1 emits light. It can be more explicit.

In the above-mentioned embodiment, the panel plate 1 is provided with the pressing projection 1b to form the light-shielding contact surface. However, as shown in FIG. 4, the peripheral portions of the openings 6a ... Of the light-shielding elastic sheet member 6 are formed. It is also possible to provide bulging portions 6b ... Enclosing the bulging portions, form the panel plate 1 into a flat plate shape, and crush the bulging portions 6c. In this case, in order to prevent the bulged portions of the bulged portions 6b ... From bulging in a direction that hinders the movement of the operating member 53a of the slider 53, a step is formed on the upper wall portion 51a of the case body 51. Part 51a1
Is preferably formed.

In the above embodiment, the light shielding elastic sheet member 6 is used.
Is a single sheet, but the light-shielding elastic sheet member 6
Need only surround at least the periphery of the through hole 51b provided in the upper wall portion 51a of the case body 51 of the variable resistor 5, and a light shielding elastic sheet member is separately provided corresponding to each through hole 51b. May be.

In the above embodiment, the light-shielding elastic sheet member 6 is fixed to the variable resistor 5 side. However, the light-shielding elastic sheet member is fixed to the panel plate 1 and the pressing projection is provided to the variable resistor 5. It may be provided on the upper wall portion 51a of the case body 51.

In the above embodiment, the slide type variable resistor is described as an example of the electronic component used in the electronic equipment, but the present invention can be applied to the electronic component provided with other operating members such as a switch. Of course.

[0029]

According to the first aspect of the present invention, it is possible to prevent the light from the light emitting source from leaking from the panel through hole even when the light shielding wall is not provided or when the light shielding wall cannot be provided. According to the second aspect of the invention, the attachment of the light shielding elastic sheet member can be completed at the stage of manufacturing the electronic component, and the electronic device can be easily assembled. Moreover, since the light-shielding elastic sheet member is compressed so as to wrap around the tip of the pressing protrusion, it is possible to reliably block the light from the light emitting source on the contact surface between the pressing protrusion and the light-shielding elastic sheet member. There is an advantage that a light-shielding contact surface that can be formed can be formed. According to the invention of claim 3, there is an advantage that the deformation amount of the light shielding elastic sheet member deformed by the pressing convex portion can be increased and the light shielding contact surface can be formed more reliably. According to the invention of claim 4, there is an advantage that light leaking through the circuit board can be shielded by applying a light-shielding paint to the back surface of the circuit board fitted in the opening of the case body of the electronic component. According to the invention of claim 5, it is possible to provide an electronic component that facilitates the assembly work of the electronic device.

[Brief description of drawings]

1A and 1B are a schematic cross-sectional view in an intermediate step when assembling an electronic device of an embodiment and a cross-sectional view of a main part of the electronic device after assembly.

2A and 2B are perspective views respectively showing a main part of a slide type variable resistor as an example of an electronic component used in this embodiment.

FIG. 3 is a sectional view of a main part showing a modified example of the embodiment of FIG.

FIG. 4 is a sectional view of a main part showing a modified example of the embodiment of FIG.

FIG. 5 is a schematic cross-sectional view for explaining the structure of a conventional electronic device.

[Explanation of symbols]

 1 Panel Plate 1a Pressing Projection 2 Panel Through Hole 3 Case Body 4 Fitting Hole 5 Sliding Variable Resistor (Electronic Component) 6 Light-shielding Elastic Sheet Member

Claims (5)

[Claims] 1. A panel portion has a light emitting portion which emits light when illuminated by light from a light emitting source disposed inside a case, and at least one operating member projects from a panel through hole formed in the panel portion. An electronic device in which an electronic component is disposed inside the case, wherein a light-shielding elastic sheet member having a through hole corresponding to the panel through hole is sandwiched between the case body of the electronic component and the panel section. An electronic device characterized in that 2. The light shielding elastic sheet member is fixed to an outer surface of a case body of the electronic component, and the panel portion has a pressing convex portion for pressing the periphery of the through hole of the light shielding elastic sheet member. The electronic device according to claim 1, wherein the electronic device is formed. 3. The electronic device according to claim 2, wherein a gap is formed between the case body of the electronic component and the light-shielding elastic sheet member at a position corresponding to the pressing protrusion. 4. The case main body of the electronic component has an open-ended shape having an opening at a portion facing a wall portion from which the operation member projects, and the case main body has an opening. A circuit board having a plurality of mounting leg portions projecting in a direction opposite to the direction in which the operation member projects around, and a circuit board having a circuit necessary for the electronic component on the surface is the surface inside the case body. The electronic device according to claim 3, wherein the electronic device is fitted in the opening so as to face, and light-shielding paint is applied to the back surface of the circuit board. 5. The electronic component for use in the electronic device according to claim 1, wherein the operating member projects from an operating member leading-through hole provided in the case body, and the operating member leading-through hole is formed on an outer surface of the case body. An electronic component to which an elastic sheet member having a through hole corresponding to is fixed.