JP2002267504A - Defogging dustproof front cover and defogging dustproof on-vehicle meter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a defogging dustproof front cover and a defogging dustproof on-vehicle meter with enhanced appearance and safety, by improving a ventilating property while preventing a gap being produced between the front cover and a meter body part. SOLUTION: This front cover 1 is formed of a transparent material and fastened to the meter body part so as to cover a front opening part in the body part for housing an indicating instrument therein. Contour-line-like ribs R1 to R10 are formed in an orbiting manner on the rear side of the front cover 1 and somewhat inside the periphery thereof. The ribs R1 to R10 form labyrinth- like gaps G1 to G10 for ventilation, and end parts of the ribs R1 to R10 are each formed into a round shape. The front cover 1 is fastened to the body part with fastening means 11 to 14 and 21 to 24 formed at parts of the periphery of the front cover 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a front cover of various meters mounted on agricultural machines, industrial machines, construction vehicles, and the like, and a vehicle-mounted meter having such a front cover. The present invention relates to a front cover having the front cover and an antifogging and dustproof vehicle-mounted meter having the front cover.

[0002]

2. Description of the Related Art An agricultural machine, an industrial machine, a construction vehicle, and the like are equipped with a speedometer, a tachometer, a warning indicator, or a combination meter in which these are integrated. These meters are provided with a transparent or translucent front cover or a front cover made of resin for protecting the display unit. However, due to aging, the front cover or the components of the meter body may warp, deform, etc., causing water to enter the backside of the front cover of the meter during car washing, rainy weather, etc. May cloud. Agricultural machinery, industrial machinery, construction vehicles, etc. are often structurally equipped with an engine below the meter, so that dust and dirt enter the back of the front cover of the meter due to the blowing of the engine wind. Often, the backside of the front cover is soiled. Then, there is a problem that the front surface of the front cover once fogged or soiled does not return to its original state unless it is subjected to a long period of time or, in some cases, disassembly and cleaning. This problem will be further described below with reference to FIGS.

FIG. 4 is a plan view showing an example of a front cover of a conventional vehicle-mounted meter. However, this plan view is shown in FIG.
(A) is the direction shown by the arrow D, that is, the front cover 1a viewed from the back side. FIG. 5A is a BB cross-sectional view of the conventional example shown in FIG. FIG.
It is sectional drawing to which the b part of (A) was expanded. FIG. 6 is an explanatory diagram showing a state of ventilation according to the conventional example shown in FIG. The in-vehicle meter to which the front cover 1a as shown in FIG. 4 is attached is basically used for agricultural machines, industrial machines, construction vehicles, and the like. In this type of vehicle, the vehicle-mounted meter is disposed above the vehicle-mounted engine from a structural point of view. The in-vehicle meter is a speedometer, a tachometer, a warning indicator, or a combination meter in which these are integrated.

The front cover 1a is a see-through plate formed of a transparent material fixed to the meter main body so as to cover the front opening of the meter main body for storing the indicating instrument. The front cover 1a has a contact plane portion 2 of a predetermined width formed so as to continuously go around the back surface of the cover slightly inside the outer edge.
0a. The contact plane portion 20a comes into contact with the dial 5 at the time of assembly, as will be described with reference to FIG.

[0005] A plurality of fixing pieces 21 for fixing the front cover 1a to the meter body are provided on a part of the outer edge of the front cover 1a.
To 24 are formed. Each of the fixing pieces 21 to 24 has screw holes 31 to 34 used for fixing the front cover 1a to the meter main body. Further, a plurality of locking pieces 11 to 14 for fixing the front cover 1a to the meter main body are formed on a part of the outer edge of the front cover 1a.
Further, the front cover 1a is assigned a semicircular analog meter section 41 at a lower center portion thereof, a rectangular LCD section 44 at an upper portion thereof, and two warning and blinker sections 42 on both sides thereof. The analog meter section 41 covers a dial and a pointer of an analog meter such as a tachometer or a speedometer disposed on the meter main body side. The warning and turn signal unit 42 covers a direction indicator panel and various warning panels provided on the meter main body side. LC
The D section 44 covers a liquid crystal display section provided on the meter main body side for displaying digital data such as time.

As shown in the sectional views of FIGS. 5A and 5B, the front cover 1a is fixed so that the above-mentioned contact flat portion 20a is in line contact with the facing 5 at the contact portion T20. I have. The contact portion T20 will be additionally described with reference to FIG. Further, a light source 3 for illuminating a display design on the dial 4 is provided on the inner bottom surface of the case 2 constituting a main part of the meter main body. This dial 4
Is sandwiched between the case 2 and the facing 5.

The state of ventilation in the conventional example having the above-described configuration will be described with reference to FIG. FIG. 6 corresponds to the plan view shown in FIG. As shown in FIG. 6, when the front cover 1a is attached to the meter main body, the contact surface T20 indicated by oblique lines is formed by the above-mentioned contact flat surface portion 20a and the facing 5. Then, immediately after assembling or in the initial stage after assembling, the space formed by the front cover 1a, the dial 4 and the facing 5 is almost completely blocked from ventilating the outside of the meter as shown by the arrow in FIG. Moisture, dust and the like hardly enter the space from the outside.

[0008]

However, the front cover 1a or the facing 5 may be warped or deformed due to aging, heat, or the like. Front cover 1a as described above
And the return 5 are fixed so as to be in surface contact as indicated by T20, so that the fixing force is dispersive.
The front cover 1a and the facing 5 are in a state in which they are not fixed as in the initial state against deformation and the like. That is, a gap is generated between the front cover 1a and the facing 5 and from this gap,
During car washing, rainy weather, and the like, moisture may enter the back side of the front cover 1a of the meter and fog the back surface of the front cover. Also,
Agricultural machines, industrial machines, construction vehicles, and the like are often provided with an engine below the meter due to its structure, and dust and dirt enter the back side of the front cover 1a of the meter due to blow-up of the engine wind and the like. Often the back of the front cover is soiled. And
Once the back surface of the front cover becomes cloudy or dirty, FIG.
As shown in (1), since the conventional meter has no ventilation structure, it does not return to the original state for a long period of time, or in some cases, unless it is disassembled and cleaned. That is, there is a problem that the state in which the visibility of the meter is lowered is continued, and the appearance and the safety are also lowered.

Accordingly, in view of the above-mentioned situation, the present invention provides an anti-fogging and dust-proof front cover having improved aesthetics and safety by preventing the occurrence of a gap between the front cover and the meter body and improving the air permeability. Another object of the present invention is to provide an anti-fogging and dust-proof in-vehicle meter.

[0010]

Means for Solving the Problems The anti-fogging and dust-proof table cover according to claim 1, which has been made to solve the above-mentioned problems, is shown in FIG.
As shown in FIG. 3 to FIG. 3, a front cover 1 made of a transparent material fixed to the meter main body so as to cover a front opening of the meter main body for storing the indicating instrument. Contoured ribs R1 to R10 formed around the back surface of the cover slightly inside the outer edge of the
Maze-shaped gaps G1 to G10 formed by mazes 1 to R10 and the ribs R1 to R formed in an R shape
10 and fixing means 11 for fixing the front cover 1 formed on a part of the outer edge to the meter main body.
14, 21 to 24.

According to the first aspect of the present invention, the anti-fogging and dust-proof surface cover is formed of a transparent material, and is attached to the meter main body so as to cover the front opening of the meter main body for housing the indicating instrument. It is fixed. On the rear surface of the cover slightly inside the outer edge of the front cover 1, a contoured rib R
1 to R10 are formed. The ribs R1 to R10 form labyrinth-like ventilation gaps G1 to G10, and the tips of the ribs R1 to R10 are formed in an R shape. Further, the front cover 1 is fixed to the meter main body by fixing means 11 to 14 and 21 to 24 formed on a part of the outer edge of the front cover 1. In this manner, since the ribs R1 to R10 have the R-shaped tips and are formed at the same height, the front cover 1 and the meter main body are fixed by line contact as shown at T1 to T10 in FIG. You. That is, the front cover 1
When the is fixed to the meter main body, the fixing force is intensively applied to the line contact portions T1 to T10, so that a stronger fixing force can be obtained as compared with the surface contact shown in FIG.
As a result, it is possible to reduce the backlash caused by warpage, deformation, and the like caused by the components of the front cover 1 or the meter main body, which is a conventional problem, and to prevent moisture and dust from coming into contact with the front cover 1 and the meter main body. Etc. are prevented from entering. Further, ribs R1 to R
The labyrinth-shaped gaps G1 to G10 formed at 10 ensure the minimum required air permeability and convection with the outside of the meter, and effectively prevent fogging on the back surface of the front cover. In particular,
Since the gaps G1 to G10 are maze-shaped, there is no direct ingress of moisture even in rainy weather or car washing.

According to a second aspect of the present invention, there is provided an anti-fogging and dustproof surface cover according to the first aspect of the present invention, as shown in FIGS. A plurality of R1 to R10 and the gaps G1 to G10 are formed in a dispersed manner.

According to the second aspect of the present invention, the ribs R1 to R1 are provided.
Since the plurality of R10s and the gaps G1 to G10 are formed in a dispersed manner, the fixation of the front cover 1 and the meter body is further stabilized, and the air permeability is also improved.

According to a third aspect of the present invention, there is provided an anti-fogging and dust-proof surface cover according to the first or second aspect. The fixing means 11 to 14 and 21 to 24 are fixing pieces 21 to 24 provided with screw holes 31 to 34 used for fixing the front cover 1 to the meter main body.
And locking pieces 11 to 14 used at the time of fixing.

According to the third aspect of the present invention, the fixing means 1
1 to 14, 21 to 24 are composed of fixing pieces 21 to 24 provided with holes 31 to 34 for screwing and locking pieces 11 to 14 used at the time of fixing. Sticking to the meter body is even stronger and more reliable. This fixation is also facilitated.

According to a fourth aspect of the present invention, there is provided an in-vehicle anti-fogging and dust-proof vehicle meter having a front opening of a meter main body disposed above a vehicle engine, as shown in FIGS. Transparent cover 1 fixed so as to cover
The front cover 1 and the meter main body are provided with a plurality of maze-shaped ventilation gaps G1.
To G10, and portions other than the gaps G1 to G10 are fixed in line contact.

According to the invention described in claim 4, the vehicle-mounted meter has a transparent front cover 1 fixed so as to cover the front opening of the meter body disposed above the vehicle-mounted engine.
Having. The front cover 1 and the meter main body are fixed so as to form a plurality of labyrinth-like ventilation gaps G1 to G10 and to make line contact with portions other than the gaps G1 to G10. As described above, the front cover 1 and the meter main body are provided with a plurality of maze-shaped ventilation gaps G1 to G1.
Since the portions other than the gaps G1 to G10 are fixed in line contact while forming G10, the fixing force is much stronger than the surface contact shown in FIG. As a result, rattling due to warpage, deformation, etc. due to the components of the front cover 1 or the meter main body, which is a conventional problem, is reduced, and the meter main body and the front cover 1 arranged above the vehicle-mounted engine are reduced. Prevents intrusion of moisture, dust, etc. from the contact area with the Furthermore, by the maze-shaped gaps G1 to G10,
The required minimum air permeability and convection with the outside of the meter are secured, and fogging on the back surface of the front cover is effectively prevented. In particular, since the gaps G1 to G10 are maze-shaped, there is no direct ingress of moisture even in rainy weather or during car washing.

[0018]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a plan view showing an embodiment of the present invention. However, this plan view is shown in FIG.
, That is, the front cover 1 is viewed from the back side. The in-vehicle meter to which the front cover 1 is attached is basically used for agricultural machines, industrial machines, construction vehicles, and the like. In this type of vehicle, from the viewpoint of space, etc.,
The on-board meter is located above the on-board engine. The in-vehicle meter is a speedometer, a tachometer, a warning indicator, or a combination meter in which these are integrated.

The front cover 1 is a see-through plate formed of a transparent material fixed to the meter main body so as to cover the front opening of the meter main body containing the indicating instrument. This material is, for example, a dark transparent acrylic resin. The front cover 1 has a trapezoidal shape having a curved surface angle in the plan view of FIG. The front cover 1 has a plurality of contoured ribs R1 to R10 formed so as to go around the rear surface of the cover slightly inside the outer edge. Each rib R1 to R10
When viewed from the front, the vicinity of the end is formed in a key shape, and the ribs R1 to R10 form maze-shaped ventilation gaps G1 to G10 due to the key shape. These ribs R1 to R10 and gaps G1 to G10
Are formed in a distributed manner. By forming a plurality in a distributed manner, the fixation of the front cover 1 and the meter body is stabilized, and the air permeability is further improved. As shown in FIG. 2, each of the ribs R1 to R10 protrudes from a part of the back surface of the front cover 1 and contacts a facing 5 which is a part of the meter main body. The tip of each of the ribs R1 to R10 is formed in an R shape. According to the gist of the present invention, at least one rib and only one gap are required, but a plurality of ribs and gaps are more preferable for the above-mentioned reason.

A part of the outer edge of the front cover 1 has a plurality of fixing pieces 21 to 2 for fixing the front cover 1 to the meter body.
4 are formed. These fixing pieces 21 to 24 are
It has holes 31 to 34 for screwing which are used when the front cover 1 is fixed to the meter main body. Further, a plurality of locking pieces 11 to 14 for fixing the front cover 1 to the meter main body are formed at a part of the outer edge of the front cover 1. With such a configuration, the fixing of the front cover 1 to the meter main body is further strengthened and secured. In addition, fixation becomes easy. The locking pieces 11 to 14 and the fixing pieces 21 to 24 correspond to fixing means in the claims.

Further, the front cover 1 is assigned a semicircular analog meter portion 41 at the lower center, a rectangular LCD portion 44 at the upper portion thereof, and two warning and blinker portions 42 on both sides thereof. The analog meter section 4
Reference numeral 1 covers a dial and a pointer of an analog meter such as a tachometer or a speedometer disposed on the meter main body side. The warning and turn signal unit 42 covers a direction indicator panel and various warning panels provided on the meter main body side. The LCD section 44 covers a liquid crystal display section provided on the meter main body side for displaying digital data such as time.

The front cover 1 will be further described with reference to FIGS. 2 (A) and 2 (B). FIG.
FIG. 4 is an AA cross-sectional view in the embodiment shown in FIG. The cross-sectional view of FIG. 2A also includes a cross-sectional view of the meter main body to which the front cover 1 is attached. FIG.
It is sectional drawing which expanded the a section of (A).

As shown in the sectional views of FIGS. 2A and 2B, the front end of the front cover 1 formed in the R shape of the rib R5 is in line contact with the facing 5 at the contact portion T5. Is fixed. Although not shown in FIG. 2, the ribs R1 to R4 and R6 to R10 also have the same height from the back surface of the front cover 1, and the front cover 1 has contact portions T1 to T4, T6. It is line-contacted at T10 and fixed to the facing 5. This contact portion will be additionally described with reference to FIG. A light source 3 for illuminating a display design on the dial 4 is provided on the inner bottom surface of the case 2 that forms a main part of the meter main body. The light source 3 is
Although only one is described, a plurality of light sources 3 are dispersedly arranged on the inner bottom surface of the normal case 2. Also,
The dial 4 is sandwiched between the case 2 and the facing 5. The case 2 and the dial 5 correspond to a meter main body in the claims.

The operation of this embodiment having the above-described configuration will be described with reference to FIG. FIG. 3 is an explanatory diagram showing a state of ventilation according to the embodiment shown in FIG. The configuration of FIG. 3 is equivalent to the plan view shown in FIG. As described with reference to FIG. 1, the front cover 1 has a plurality of ribs R1 to R10 slightly inside the outer edge thereof, and each of the ribs R1 to R10 has a maze-shaped ventilation gap G1 to G10. Is formed. That is, the front cover 1 and the meter main body are provided with a plurality of maze-shaped ventilation gaps G.
1 to G10 while forming these gaps G1 to G1.
The portions other than 0 are fixed in line contact as indicated by contact portions T1 to T10. In other words, the front cover 1
And the meter body are fixed only through the contact portions T1 to T10.

As shown by the arrows in FIG. 3, the space formed by the front cover 1, the dial 4 and the facing 5 has a maze-shaped ventilation gap G1 formed as described above with respect to the outside of the meter. Through G10, the minimum required ventilation is promoted. Note that reference numerals 41 to 44 are also the same as those in FIG.

As described above, according to the present embodiment, the rib R
Since the front end of each of 1 to R10 is formed in an R-shape and at an equal height, the front cover 1 and the meter main body are connected to each other by T
It is fixed by line contact as shown at 1 to T10. That is, when the front cover 1 is fixed to the meter main body, the fixing force is intensively applied to the line contact portions T1 to T10, and is stronger than the conventional surface contact shown in FIG. Can be obtained. As a result, the conventional problem of warpage caused by the components of the front cover 1 or the meter body,
It prevents rattling due to deformation and the like, and prevents entry of moisture, dust and the like from the contact portion between the front cover 1 and the meter body. Further, as shown in FIG. 3, the labyrinth-like gaps G1 to G10 formed in the ribs R1 to R10 ensure the minimum necessary air permeability and convection with the outside of the meter, and effectively prevent clouding on the back surface of the front cover. To prevent. In particular, the gap G1
Since G10 has a maze shape, moisture does not directly enter even when it rains or when the car is washed. As a result, according to the present embodiment, an antifogging and dustproof surface cover and an antifogging and dustproof in-vehicle meter with improved aesthetics and safety can be obtained.

The parts 41 to 43 and the fixing means 21
The shapes of Nos. To 24 and 11 to 14 are not limited to the above embodiment, and can be appropriately changed without departing from the gist of the present invention.

[0028]

As described above, according to the first aspect of the present invention, the front ends of the ribs R1 to R10 are formed in an R-shape and an equal height, so that the front cover 1 and the meter main body are formed. Are fixed by line contact as shown at T1 to T10 in FIG. That is, when the front cover 1 is fixed to the meter main body, the fixing force is intensively applied to the line contact portions T1 to T10, and a stronger fixing force is obtained as compared with the surface contact shown in FIG. Will be able to As a result, it is possible to reduce the backlash caused by warpage, deformation, and the like caused by the components of the front cover 1 or the meter main body, which is a conventional problem, and to prevent moisture and dust from coming into contact with the front cover 1 and the meter main body. Etc. are prevented from entering. Further, the labyrinth-like gaps G1 to G10 formed in the ribs R1 to R10 ensure the minimum required air permeability and convection with the outside of the meter, and effectively prevent the rear surface of the front cover from fogging. In particular, the gaps G1 to G10
Is a maze, so that moisture does not enter directly even in rainy weather or car washing. As a result, according to the first aspect of the invention, an antifogging and dustproof surface cover with improved aesthetics and safety can be obtained.

According to the second aspect of the present invention, the ribs R1 to R1
Since the plurality of R10s and the gaps G1 to G10 are formed in a dispersed manner, the fixation of the front cover 1 and the meter body is further stabilized, and the air permeability is also improved. As a result,
According to the second aspect of the present invention, it is possible to obtain an antifogging and dustproof surface cover with further improved appearance and safety.

According to the third aspect of the present invention, the fixing means 1
1 to 14, 21 to 24 are composed of fixing pieces 21 to 24 provided with holes 31 to 34 for screwing and locking pieces 11 to 14 used at the time of fixing. Sticking to the meter body is even stronger and more reliable. This fixation is also facilitated. As a result, according to the third aspect of the present invention, an antifogging and dustproof surface cover with further improved aesthetics and safety and easy assembly can be obtained.

According to the fourth aspect of the present invention, the front cover 1
And the meter main body portion, while forming a plurality of maze-shaped ventilation gaps G1 to G10, these gaps G1 to G10
Since the other parts are fixed so as to make line contact, the fixing force is much stronger than the surface contact shown in FIG. As a result, rattling due to warpage, deformation, etc. due to the components of the front cover 1 or the meter main body, which is a conventional problem, is reduced, and the meter main body and the front cover 1 arranged above the vehicle-mounted engine are reduced. Prevents intrusion of moisture, dust, etc. from the contact area with the Further, maze-shaped gaps G1 to G10
Thereby, the minimum required air permeability and convection with the outside of the meter are secured, and fogging on the back surface of the front cover is effectively prevented. In particular, since the gaps G1 to G10 are maze-shaped, there is no direct ingress of moisture even in rainy weather or during car washing.
As a result, according to the fourth aspect of the invention, an antifogging and dustproof on-vehicle meter with improved aesthetics and safety can be obtained.

[Brief description of the drawings]

FIG. 1 is a plan view showing an embodiment of the present invention.

FIG. 2A is a cross-sectional view along the line AA in the embodiment shown in FIG. 1; FIG. 2B is an enlarged cross-sectional view of a part a of FIG.

FIG. 3 is an explanatory diagram showing a state of ventilation according to the embodiment shown in FIG. 1;

FIG. 4 is a plan view showing an example of a front cover of a conventional vehicle-mounted meter.

FIG. 5 (A) is a view showing a conventional example shown in FIG.
It is B sectional drawing. FIG. 5B is an enlarged cross-sectional view of a portion b in FIG.

FIG. 6 is an explanatory view showing a state of ventilation according to the conventional example shown in FIG. 4;

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 front cover 2 case (meter main body) 3 light source 4 dial 5 look back (meter main body) 11 to 14 locking piece (fixing means) 21 to 24 fixing piece (fixing means) 31 to 34 hole 41 analog meter section 42 , 43 Warning and blinker part 44 LCD part R1 to R10 Rib G1 to G10 Gap T1 to T10 Contact part

Claims (4)

[Claims] 1. A front cover made of a transparent material fixed to a meter main body so as to cover a front opening of a meter main body for storing an indicating instrument, wherein the front cover is slightly inside an outer edge of the front cover. A contoured rib formed on the back surface of the cover, a maze-shaped ventilation gap formed by the rib, a tip of the rib formed in an R shape, and one of the outer edges. And a fixing means for fixing the front cover to the meter main body formed in a portion thereof. 2. The anti-fogging and dust-proof surface cover according to claim 1, wherein a plurality of the ribs and the gaps are formed in a dispersed manner. 3. The anti-fogging and dust-proof surface cover according to claim 1, wherein the fixing means is provided with a screw hole used for fixing the front cover to the meter main body. And a locking piece used at the time of the fixing. 4. A vehicle-mounted meter having a transparent front cover fixed so as to cover a front opening of a meter main body disposed above a vehicle-mounted engine, wherein the front cover and the meter main body are separated from each other. An anti-fogging and dust-proof in-vehicle meter, wherein a plurality of maze-shaped ventilation gaps are formed, and portions other than the gaps are fixed in line contact.