JPH08219818A - Dustproof structure for meter device - Google Patents

Abstract

PURPOSE: To secure the visibility of scale of a dial and an indicator by forming a projection for sealing a clearance, which comes about between the inside surface of an engaging part and the inner wall of a part to be engaged, at nearly the same width with the engaging part. CONSTITUTION: As each engaging part 10 is inserted into a through hole 8 from the front of a part 7 to be engaged, a hook part 11 slides for contact with the outer wall of the part 7 to be engaged, and the tip of the engaging part 10 is bent inside, and while a projection 13 contacts with the inner wall of the part 7 to be engaged. When the engaging part 10 is pushed more into the through hole 8, the hook part 11 passes through the through hole 8, and while the engaging part 10 is elastically restored outside, and the hook part 11 is hooked on the rear edge of the through hole 8. The engaging part 10 is fixed to the part 7 to be engaged, and while a right and a left side surfaces of the engaging part 10 contact with the right and the left walls of the part 7 to be engaged, and the projection 13 contacts with the inner wall of the part 7 to be engaged so as to seal a clearance 12 generated between the inner wall of the part 7 to be engaged and the inside surface of the engaging part 10, and the intrusion of dust into an inner space between the surface glass 9 and an inside cover 5 through the clearance 12 is prevented.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dustproof structure used for a meter device such as a combination meter mounted on an automobile, and more particularly to a dustproof structure between a facing glass and a front glass attached to a front opening of the facing.

[0002]

4 to 5 show a conventional meter device, 21 is a case having a front opening made of synthetic resin,
Reference numeral 22 is a dial with scales attached to the instrument mounted inside the case 21, 23 is a pointer of the instrument, and 24 is a dial having a front opening made of synthetic resin.
Reference numeral 4 indicates a front surface of the peripheral edge portion of the dial 22 which is framed by being attached to the front opening of the case 21. A plurality of engaged portions 26 are provided on the outside of the peripheral wall of the front opening of the dial 24. I am doing it.

These engaged portions 26 have square through holes 2
7 are formed in the front-rear direction, and these through holes 27 are tapered holes whose diameter gradually decreases from the front to the rear.

Reference numeral 28 is a front glass made of transparent synthetic resin, and a plurality of engaging portions 29 are provided on the periphery of the front glass 28.
Corresponding to the through hole 27 of the engaged portion 26 is provided so as to project in a rearward inclined shape that spreads outward toward the rear.

The engaging portion 29 is formed such that the width thereof is gradually reduced from the front side toward the rear side, and when the engaging portion 29 is inserted into the through hole 27 from the front side of the engaged portion 26, the middle thereof is formed. The parts are in contact with the left and right walls of the engaged part 26.

An engaging portion 29 protruding rearward from the through hole 27
A hook portion 30 is projectingly provided at the tip end of the through hole 27, and the hook portion 30 is engaged with the rear edge of the through hole 27 to form the engaging portion 29.
Is fixed to the engaged portion 26, so that the front glass 28 is covered and attached to the front opening of the dial 24, and the scale of the dial 22 and the pointer 2 are inserted from the front of the front glass 28 through the dial 24.
3 is visible.

[0007]

However, in the above-mentioned conventional meter device, as shown in FIG.
A gap 31 is formed between the inner wall of the engaged portion 26 and the inner side surface of the engaging portion 29 forming the gap 7, and as shown by an arrow X, dust is present between the gap 31 and the front glass 28 and the facing plate 24. And enters the inner surface of the front glass 28 and adheres to the inner surface of the front glass 28. As a result, clouding occurs on the inner surface of the front glass 28, which reduces the visibility of the dial 22 and the pointer 23.

Therefore, the present invention prevents dust from entering through the gap between the inner wall of the engaged portion and the inner surface of the engaging portion, and ensures the visibility of the dial and the pointer of the dial plate. Is also trying to provide.

[0009]

According to a first aspect of the present invention, there is provided a peripheral wall of a facing plate having a window which is covered and attached to a front opening of a case in which the instrument is mounted, and which has a window for edging the front surface of the peripheral edge of the dial of the instrument. A plurality of engaged parts having through holes in the front-rear direction are provided on the outer side, and the engaging parts are provided on the peripheral wall of the transparent front glass so as to project rearward corresponding to the through holes of the engaged parts. At the same time, by projecting a hook portion outside the tip of the engaging portion, and inserting the engaging portion into the through hole from the front of the engaged portion, the hook portion is attached to the rear edge of the through hole, In a meter device in which the engaging part is fixed to the engaged part and the front glass of the front glass is covered and attached to the front part, the inner surface of the engaging part is formed between the engaging part and the inner wall of the engaged part. It is characterized in that the projection for closing the gap is formed to have substantially the same width as the engaging portion.

According to a second aspect of the present invention, the projection according to the first aspect is formed on the inner side surface of the engaging portion so as to be in contact with the inner wall of the engaged portion.

According to a third aspect of the present invention, a protrusion that contacts the inner wall of the engaged portion according to the second aspect is formed, and a recessed portion that is open to the inner wall side of the engaged portion is formed in the center of the protrusion. It is characterized by being formed as a peripheral wall.

According to a fourth aspect of the present invention, the projection according to the first aspect is formed on the inner surface of the molding base of the engaging portion so as to be in contact with the front edge of the through hole of the engaged portion. I am trying.

[0013]

According to the first aspect of the present invention, the engaging portion is inserted into the through hole from the front of the engaged portion and the hook portion is attached to the rear edge of the through hole, so that the engaging portion has substantially the same width. The projection closes a gap formed between the inner side surface of the engaging portion and the inner wall of the engaged portion, and prevents dust from entering the internal space between the front glass and the facing through the gap.

According to the second aspect of the present invention, since the projection is formed on the inner surface of the engaging portion so as to be in contact with the inner wall of the engaged portion,
It is possible to prevent dust from entering by almost eliminating the gap.

According to the third aspect of the present invention, the protrusion that comes into contact with the inner wall of the engaged portion is formed as a peripheral wall formed by surrounding the central portion thereof with a concave portion that opens toward the inner wall of the engaged portion. Therefore, when the engaging part is inserted into the through hole of the engaged part and the hook part is engaged and fixed to the rear edge of the through hole, the sliding resistance between the protrusion and the inner wall of the engaged part is reduced. By making it smaller, the engaging portion can be easily inserted and fastened to the engaged portion with a light operating force.

According to the fourth aspect of the present invention, since the projection is formed on the inner surface of the molding base of the engaging portion so as to be in contact with the front edge of the through hole of the engaged portion, the engaging portion is engaged. When the hook portion is inserted into the through hole of the portion and is fixed to the trailing edge of the through hole by fixing, the protrusion does not make sliding contact with the inner wall of the engaged portion, and the engaging portion is engaged. This makes it easier to insert and fasten with a lighter operating force, and the projection contacts the front edge of the through hole to close the gap between the inner wall of the engaged portion and the inner side surface of the engaging portion to prevent dust from entering. Stop the intrusion.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to the drawings.

1 and 2, 1 is a case having a front opening made of synthetic resin, 2 is an instrument mounted inside the case 1, 3 is a dial with scales of the instrument 2 and the like, 4
Is a pointer of the measuring instrument, and 5 is a dial having a front opening made of synthetic resin. The dial 5 is a window which is attached to the front opening of the case 1 to cover the front surface of the peripheral edge of the dial plate 3. 6, a plurality of engaged parts 7 are provided on the outside of the peripheral wall of the front opening of the dial 5 so as to project.

Square through holes 8 are formed in the engaged portions 7 in the front-rear direction, and the through holes 8 are gradually reduced in diameter from the front to the rear as shown in FIG. It is a tapered hole.

Reference numeral 9 denotes a front glass made of transparent synthetic resin, and a plurality of engaging portions 10 are directed to the rear side of the front glass 9 in correspondence with the through holes 8 of the plurality of engaged portions 7. It is installed so as to be tilted backward to spread outward.

The engaging portion 10 is formed such that the width thereof is gradually reduced from the front side toward the rear side, and when the engaging portion 10 is inserted into the through hole 8 from the front side of the engaged portion 7, the middle portion thereof is formed. The parts are in contact with the left and right walls of the engaged part 7.

At the tip of the engaging portion 10 projecting rearward from the through hole 8, a hook portion 11 is provided so as to project outward so that the hook portion 11 is attached to the rear edge of the through hole 8. is there.

The basic structure of these is the same as that of the above-mentioned conventional structure, but when the engaging portion 10 is inserted into the through hole 8 of the engaged portion 7, it is formed on the inner surface of the engaging portion 10. Further, a protrusion 13 that closes the gap 12 formed between the inner wall of the engaged portion 7 and the inner surface of the engaging portion 10 is formed to have substantially the same width as the engaging portion 10.

In this embodiment, the projection 13 is provided on the inner side surface of the engaging portion 10 so as to be in contact with the inner wall of the engaged portion 7, and the projection 13 is provided at the center thereof. A concave portion 14 that opens to the inner wall side of the engaged portion 7 is formed as a peripheral wall that is formed so as to surround.

According to the structure of this embodiment, in order to cover and attach the front glass 9 to the front opening of the facing glass 5, each engaging portion 10 is provided.
As the hook is inserted into the through hole 8 from the front of the engaged portion 7, the hook portion 11 slidably contacts the outer wall of the engaged portion 7, the tip of the engaging portion 10 elastically bends inward, and the projection 13
Comes into contact with the inner wall of the engaged portion 7 and further pushes the engaging portion 10 into the through hole 8, whereby the hook portion 11 passes through the through hole 8 and at the same time, the engaging portion 10 is elastically restored to the outside. The hook portion 11 is engaged with the rear edge of the through hole 8 and
As shown in FIG. 3, the engaging portion 10 is fixed to the engaged portion 7, the left and right side surfaces of the engaging portion 10 substantially contact the left and right walls of the engaged portion 7, and the projection 13 is engaged. The gap 12 that comes into contact with the inner wall of the portion 7 and is formed between the inner wall of the engaged portion 7 and the inner side surface of the engaging portion 10 is blocked by dust, and dust is introduced from the gap 12 between the front glass 9 and the dial 5. The dial plate 3 is prevented from invading the space and avoids the formation of a cloud on the inner surface of the front glass 9.
It is possible to secure the visibility of the scale and the pointer 4.

In particular, according to this embodiment, since the projection 13 is formed as a peripheral wall which is formed by surrounding the concave portion 14 opening to the inner wall side of the engaged portion 7 in the central portion thereof, the engaging portion is formed. When 10 is inserted into the through hole 8 of the engaged portion 7, the protrusion 13
Easily elastically deforms to reduce sliding resistance, and the engaging portion 1
It is possible to easily insert and lock 0 into the engaged portion 7 with a light operating force.

Further, since the projection 13 can be brought into close contact with the inner wall of the engaged portion 7 and the gap 12 can be almost eliminated, the dustproof performance is enhanced.

In this embodiment, the protrusion 13 is provided on the inner side surface of the engaging portion 10 which is inserted and arranged in the through hole 8.
In the embodiment shown in (1), the projection 15 is formed on the inner side surface of the molding base of the engaging portion 10 so as to be in contact with the front edge of the through hole 8 of the engaged portion 7.

According to this embodiment, when the engaging portion 10 is inserted and engaged with the engaged portion 7, the projection 15 does not come into sliding contact with the inner wall of the engaged portion 7, so that a lighter operating force is required. Since the protrusion 15 contacts the front edge of the through hole 8 and closes the gap 12, it is possible to reliably prevent dust from entering.

[0030]

As described above, according to the present invention, the following effects can be obtained.

According to the first aspect of the present invention, the engaging portion is inserted into the through hole from the front of the engaged portion and the hook portion is attached to the rear edge of the through hole, so that the engaging portion has substantially the same width. The protrusions close the gap formed between the inner wall of the engaged portion and the inner surface of the engaging portion to prevent dust from entering the internal space between the front glass and the facing through the gap. The cloudiness of the glass can be eliminated and the visibility of the dials and pointers of the dial can be secured, and the sense of quality and reliability can be further improved.

According to the second aspect, since the projection is formed on the inner surface of the engaging portion so as to be in contact with the inner wall of the engaged portion,
It is possible to prevent dust from entering by almost eliminating the gap.

According to the third aspect of the present invention, the projection that comes into contact with the inner wall of the engaged portion is formed as a peripheral wall that is formed by surrounding the central portion thereof with a recess that opens toward the inner wall of the engaged portion. Therefore, when the engaging part is inserted into the through hole of the engaged part and the hook part is engaged and fixed to the rear edge of the through hole, the sliding resistance between the protrusion and the inner wall of the engaged part is reduced. By making it smaller, the engaging portion can be easily inserted and fastened to the engaged portion with a light operating force.

According to the fourth aspect of the present invention, since the projection is formed on the inner surface of the molding base of the engaging portion so as to be in contact with the front edge of the through hole of the engaged portion, the engaging portion is engaged. When the hook portion is inserted into the through hole of the portion and is fixed to the trailing edge of the through hole by fixing, the protrusion does not make sliding contact with the inner wall of the engaged portion, and the engaging portion is engaged. This makes it easier to insert and fasten with a lighter operating force, and the projection contacts the front edge of the through hole to close the gap between the inner wall of the engaged portion and the inner side surface of the engaging portion to prevent dust from entering. Intrusion can be surely prevented.

[Brief description of drawings]

FIG. 1 shows a main part of a first embodiment of the present invention, wherein FIG. 1A is a sectional view and FIG. 1B is a sectional view taken along the line AA of FIG.

FIG. 2 is a sectional view showing the meter device of the first embodiment.

3A and 3B show a main part of a second embodiment of the present invention, in which FIG. 3A is a sectional view and FIG. 3B is a sectional view taken along line BB of FIG.

FIG. 4 is an exploded perspective view showing a conventional meter device.

FIG. 5 is a sectional view showing a main part of the conventional example, FIG.
B figure is CC sectional view taken on the line of A figure.

[Explanation of symbols]

 1 Case 2 Instrument 3 Dial 5 Lookout 6 Window 7 Engaged Part 8 Through Hole 9 Front Glass 10 Engagement Part 11 Hook Part 12 Gap 13, 15 Protrusion

Claims (4)

[Claims] 1. A plurality of front and rear through-holes are provided on the outside of a peripheral wall of a facing plate having a window which is covered and attached to a front opening of a case in which the instrument is to be installed, and which has a window for edging the front surface of the peripheral edge of the dial of the instrument. The engaged portion is projected, the engaging portion is projected rearward on the peripheral wall of the transparent front glass so as to correspond to the through hole of the engaged portion, and the hook portion is provided outside the tip of the engaging portion. By projecting the engaging portion into the through hole from the front of the engaged portion, the hook portion is attached to the rear edge of the through hole, and the engaging portion is fixed to the engaged portion, In a meter device in which a front glass facing the front glass is covered and attached, a projection that closes a gap formed between the inner surface of the engaging portion and the inner wall of the engaged portion has substantially the same width as the engaging portion. A dustproof structure for a meter device, which is characterized in that 2. The dustproof structure for a meter device according to claim 1, wherein the projection is formed on the inner surface of the engaging portion so as to be in contact with the inner wall of the engaged portion. 3. The projection, which comes into contact with the inner wall of the engaged portion, is formed as a peripheral wall which is formed by surrounding a central portion thereof with a recess opening toward the inner wall of the engaged portion. Two
The dustproof structure of the meter device described in. 4. The dustproof structure for a meter device according to claim 1, wherein the projection is formed on the inner surface of the molded base portion of the engaging portion so as to be in contact with the front edge of the through hole of the engaged portion.