JPH07286866A - Mounting structure of transparent plate on front plate of meter case - Google Patents

Abstract

(57) [Abstract] [Purpose] The deviation of the packing 21 due to vibration when ultrasonically welding the front glass 9 and the front plate 7 at the portion B is taken into consideration.
This prevents the deterioration of the workability when the tip 17a of the outer facing part 17 is brought into contact with the packing 21 and the deterioration of the appearance due to the packing 21 being visible through the front glass 17. [Configuration] In a combination meter of a vehicle, a tachograph, which is a large instrument having a larger outer diameter and a larger depth than instruments such as a tachometer and a fuel gauge, is attached to a front glass 9 that covers the front plate 7 and a front plate. 7, inside facing part 13 and facing part insertion hole 1 into which the tachograph is inserted
5 is formed. A ring-shaped packing 21 is provided between the front plate 7 and the tip 17 a of the outer facing portion 17 of the front glass 9 in the insertion hole 15. The packing 21 has a convex portion 21a formed on the inner peripheral side.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for mounting a transparent plate on a front plate of a meter case when a large-scale instrument is provided so as to project forward from a transparent plate covering a front plate on which various instruments are arranged.

[0002]

2. Description of the Related Art Conventionally, an instrument panel of a vehicle or the like, for example, a combination meter of an automobile, is equipped with various instruments such as a speedometer, an engine tachometer, a fuel gauge, etc. for displaying the operating state of the vehicle. In such a combination meter, a tachograph for recording the operation status of the vehicle such as the speed and mileage of the vehicle may be attached to a truck, a taxi, or the like for which the vehicle is for business, for example, for carrying luggage.

A tachograph is a so-called large-scale instrument which generally has a large outer diameter and a large depth as compared with various instruments such as an ordinary speedometer. FIG. 6 is a front view of a portion of the combination meter to which the tachograph 1 is attached, and FIG. 7 is a sectional view taken along line AA of FIG. As is clear from FIG. 7, the depth of the tachograph 1 is larger than the depth of the meter case 3 itself,
In particular, the amount of protrusion from the meter case 3 increases on the front side.

The meter case 3 is provided with a front plate 7 on the front side of the case body 5 on which various instruments such as a fuel gauge are provided. On the front plate 7, the various instruments are covered and the front plate 7 is entirely covered. The front glass 9 is attached by ultrasonic welding. FIG. 8 is an exploded perspective view of the front plate 7 and the front glass 9, and the front plate 7 is provided with a tachograph insertion hole 11 which is a through hole for allowing the tachograph 1 to project from the case body 5 side. An annular inner facing portion 13 projecting toward the front glass 9 is provided on the periphery of the hole 11. on the other hand,
The front glass 9 is formed with a facing-portion insertion hole 15 that is located on the outer peripheral side of the inside facing-portion 13 and is a through hole into which the inside facing-portion 13 and the tachograph 1 are inserted. An outer facing portion 17 that protrudes toward the front plate 7 is formed on the front side.

9 (a) to 9 (c) are side sectional views showing a specific example of mounting the front glass 9 on the front plate 7 as described above. In FIG. 9A, the abutting portions B of the upper and lower front plates 7 of the front glass 9 and the abutting portions C of the outer facing portions 17 of the front glass 9 to the front plate 7 are ultrasonically welded. . In FIG. 9B, only the abutting portions B of the upper and lower front plates 7 of the front glass 9 are ultrasonically welded, and the abutting portions C of the outer facing portion 17 of the front glass 9 to the front plate 7 are shown. It is just abutting. FIG. 9C shows the front glass 9
Only the abutting portions B of the upper and lower surfaces of the front plate 7 are ultrasonically welded, and a gap D is formed between the front end of the outer facing part 17 of the front glass 9 and the front plate 7.

[0006]

However, in such a conventional mounting structure of the transparent plate on the front plate of the meter case,
In FIG. 9A, since the abutting portion C of the outer facing portion 17 of the front glass 9 to the front plate 7 is ultrasonically welded, a welding horn is formed on the periphery of the facing portion insertion hole 15 of the front glass 9. Traces remain and it looks bad, and a separate part such as a cover is required to hide it.

In FIG. 9 (b), since the abutting portion C of the outer facing portion 17 of the front glass 9 to the front plate 7 is simply in contact with the front glass 7, the rattling noise and the squeaking noise are caused by the vibration of the vehicle. There is noise, and there is discomfort.

In FIG. 9 (c), since the tip of the facing portion 17 of the front glass 9 forms a gap D with respect to the front plate 7, dust or the like is generated from the gap D to the front glass 9 and the front plate 7. When it penetrates between the surface glass and
May deform due to insufficient rigidity.

Therefore, the applicant of the present invention, as shown in FIG. 10, has a packing 19 as a ring-shaped sealing material made of rubber or the like between the front end 7 of the outer facing part 17 of the front glass 9 and the front plate 7. Japanese Patent Application No. 4-87021 discloses a technique in which the above problem, that is, the deterioration of appearance, the generation of noise, the intrusion of dust, and the like, are eliminated by interposing.

In this case, the tip of the outer facing portion 17 of the front glass 9 is ultrasonically welded to the front plate 7 at the portion B, but vibration is generated during this ultrasonic welding. However, since the packing 19 has a rectangular cross-sectional shape and the end contact portion of the outer facing portion 17 is a flat surface, the vibration causes the packing 19 made of an elastic material to move outward in the circumferential direction. In such a case, as seen from the line of sight S in FIG. 7, the packing 19 can be seen through the front glass 9 so that the appearance quality is deteriorated, and a gap is generated due to the deviation to intrude dust. Or
For example, abnormal noise is generated by receiving vibration in a displaced state.
Functional failure will occur.

In order to prevent the displacement of the packing 19 as described above, (1) the packing 19 is fixed to the front plate 7 with an adhesive or a double-sided tape.

(2) The packing 19 has a concave cross-section, and the tip of the outer facing portion 17 of the front glass 9 is fitted into this concave portion.

Although there are methods such as the above, workability is reduced in the former case due to the addition of the work of applying an adhesive agent and affixing of the double-sided tape, and in the latter case, the outer facing part 17 is fitted in the recess. In addition to the complicated work of inserting it, the convex portion on the outer peripheral side of the packing in a state where the outer facing portion 17 is fitted in the concave portion can be seen through the transparent front glass 9, resulting in poor appearance. In addition, the convex portion on the inner peripheral side of the concave packing is not a position visible through the front glass 9, and is a blind spot due to the tachograph 1 projecting forward from the front glass 9, and there is no particular problem in appearance.

Therefore, according to the present invention, the deviation of the sealing material interposed between the front end of the transparent plate and the front plate due to vibration during ultrasonic welding causes deterioration of workability and deterioration of appearance. The purpose is to prevent without inviting.

[0015]

In order to achieve the above-mentioned object, the present invention is, firstly, a transparent plate that covers the front plate including the various instruments in a meter case in which the various instruments are arranged on the front plate. Is attached by ultrasonic welding, a large instrument protruding forward from through holes provided in the front plate and the transparent plate is attached to a meter case, and an inner side projecting toward the transparent plate is attached to the peripheral edge of the through hole of the front plate. While providing a facing part, an outer facing part is provided at the peripheral edge of the through hole of the transparent plate and projects toward the front plate and is located on the outer peripheral side of the inner facing part, and between the tip of the outer facing part and the front plate. A ring-shaped sealing material is interposed, and the sealing material is provided with a convex portion projecting toward the transparent plate on the inner peripheral side with respect to the portion where the tip of the outer facing portion comes into contact.

Secondly, in the first construction, the sealing material has a flat portion with which the tip of the outer facing portion comes into contact, and a convex portion that is bent from this flat portion and projects toward the transparent plate. In addition, in the first configuration, the convex portion of the sealing material is formed by providing an inclined surface extending from the inner peripheral side to the outer peripheral side at a portion on the transparent plate side.

[0017]

According to this structure, even if vibration occurs when the transparent plate is attached to the front plate by ultrasonic welding, the tip of the outer facing portion of the transparent plate, which is in contact with the surface of the sealing material, is in contact with the surface of the sealing material. The side portions come into contact with the convex portions of the sealing material, which prevents the sealing material from being displaced outward in the circumferential direction. Since this convex portion is provided only on the inner peripheral side with respect to the portion with which the tip of the outer facing portion comes into contact, the tip of the outer facing portion is made smaller than when the tip of the outer facing portion is fitted into this concave portion. In addition to facilitating the work of contacting with the sealing material, it is difficult to see the sealing material through the transparent plate, and deterioration of appearance is prevented.

[0018]

Embodiments of the present invention will be described below with reference to FIGS. Here, the same components as those of the conventional technique shown in FIGS. 6 to 10 are designated by the same reference numerals. 1 is a sectional view corresponding to FIG.
FIG. 9 is an exploded perspective view corresponding to FIG. 8.

The front plate 7 is provided with a tachograph insertion hole 11 as a through hole into which a tachograph which is a large instrument is inserted, and a tachometer mounting portion 12a, a fuel gauge mounting portion 12b, a water temperature gauge mounting portion 12c, The warning lamp mounting portions 12d are formed respectively. The front glass 9 as a transparent plate is formed with a facing portion insertion hole 15 as a through hole into which the inside facing portion 13 formed at the periphery of the tachograph insertion hole 11 is inserted. An outer facing portion 17 located on the outer peripheral side of the inner facing portion 13 of the front plate 7 is formed on the periphery of the facing portion insertion hole 15 of the front glass 9. A slight gap E is formed between the inner peripheral surface of the outer side facing portion 17 and the outer peripheral surface of the inner side facing portion 13.

The tip 17a of the outer facing part 17 of the front glass 9
A gap is formed between the front plate 7 and the front plate 7, and a ring-shaped packing 21 made of an elastic material such as rubber is interposed as a seal member in the gap. The abutting portions B of the outer peripheral edge of the front glass 9 to the upper and lower front plates 7 are mounted by ultrasonic welding as in the conventional example.

As shown in FIGS. 3 (a) and 3 (b), which are detailed views of the F portion and the G portion of FIG. 1, the packing 21 has an inner diameter larger than the outer diameter of the inner facing portion 13 of the front plate 7. It is slightly larger and is fitted in the outer peripheral side of the inner facing portion 13, and a convex portion 21a having a triangular cross section is formed on the inner peripheral edge portion so as to project toward the transparent plate 9. The convex portion 21a is formed by bending the triangular inclined surface 21b of the convex portion 21a at a bent portion 21d at an angle of about 120 degrees with respect to the flat portion 21c with which the tip 17a of the inner facing portion 17 is in contact. Therefore, it is configured to enter the gap E between the inner peripheral surface of the outer facing portion 17 and the outer peripheral surface of the inner facing portion 13. An inner peripheral side corner portion of the tip 17a of the outer facing portion 17 is aligned with the bent portion 21d.

According to the mounting structure of the transparent plate on the front plate of the meter case as described above, when the front glass 9 is mounted on the front plate 7, the tip 17a of the outer facing portion 17 of the front glass 9 is packed 21. The upper and lower abutting portions B of the front glass 9 on the front plate 7 are fixed by ultrasonic welding in this state. Although vibration is generated during ultrasonic welding, the packing 21 is formed with the convex portion 21a.
It is prevented by 1a.

Moreover, since the convex portion 21a is provided on the inner peripheral side of the ring shape and not on the outer peripheral side, the packing 21 is difficult to see through the front glass 9 and the deterioration of the appearance quality is avoided, and Since no gap is generated due to the displacement of the packing 21, functional defects such as intrusion of dust between the front glass 9 and the front plate 7 or generation of abnormal noise when vibration is caused in the displaced state are prevented. To be done. Also, the convex portion 2
Since 1a is provided only on the inner circumference side of the ring shape, the tip 17a of the inner facing part 17 of the front glass 9 is packed 21
The work of contacting the flat surface portion 21c is not particularly complicated and the workability is good.

The convex portion 21a of the packing 21 is exposed to the outside from between the inside facing portion 13 and the outside facing portion 17, but this portion is, as described in the prior art, the front glass 9 The tachograph is arranged so as not to be seen through, but to project forward from the surface glass 9, and thus a blind spot is formed, which poses no particular problem in appearance.

FIG. 4 and FIG. 5 show another example of packing used as the seal material used in the present invention. Figure 4
The packing 23 is formed such that the convex portion 23a provided on the inner peripheral side is bent substantially at a right angle at the bent portion 23c with respect to the flat surface portion 23b and protrudes toward the front glass 9 side. In this example,
The convex portion 23a, which is perpendicular to the flat surface portion 23b, makes it possible to more reliably prevent displacement due to vibration during ultrasonic welding.

As shown in FIG. 5A, the packing 25 shown in FIG. 5 has an inclined surface 25a extending from the inner side to the outer side of the front glass 9 so that the inner side is covered with the front glass 9. It is a convex portion 25b protruding to the side. In this example, the front glass 9
By pushing the tip 17a of the outer facing portion 17 against the inclined surface 25a and pressing it, the inclined surface 25a is recessed as shown in FIG.

In each of the examples shown in FIGS. 4 and 5, the convex portion 23
Since a and 25b are provided on the inner circumference side of the ring shape and not on the outer circumference side, deterioration of appearance quality is avoided as in the above-described embodiment, and dust intrusion and abnormal noise are generated. Also, functional defects are prevented. Further, in the example of FIG. 5, the tip 17a of the outer facing part 17 of the front glass 9 may be brought into contact with an appropriate position of the inclined surface 25a, so that this work is further simplified.

The convex portions 21a, 23a, 25b may be formed continuously over the entire circumference or may be partially provided in the circumferential direction.

[0029]

As described above, according to the present invention, the sealing material interposed between the outer facing portion of the transparent plate and the front plate has an inner circumference with respect to a portion where the tip of the outer facing portion contacts. Since a convex portion protruding toward the transparent plate is provided on the side, even if vibration occurs when ultrasonically welding the transparent plate to the front plate, the sealing material is prevented from being displaced outward in the circumferential direction. In addition to making the sealing material concave and fitting the tip of the outer facing part into this recess, it is easier to bring the tip of the outer facing part into contact with the sealing material, and it is difficult to see the sealing material through the transparent plate. It is possible to prevent deterioration of the appearance.

[Brief description of drawings]

FIG. 1 is a sectional view of a structure for mounting a transparent plate on a front plate of a meter case showing an embodiment of the present invention.

FIG. 2 is an exploded perspective view of the mounting structure of FIG.

3 (a) is a detailed view of an F part in FIG. 1, and FIG. 3 (b) is a detailed view of a G part in FIG.

FIG. 4 is a cross-sectional view showing another example of packing used in the mounting structure of FIG.

5 is a cross-sectional view showing still another example of packing used in the mounting structure of FIG. 1. FIG.

FIG. 6 is a front view of a portion where a tachograph is mounted on a vehicle instrument panel in a conventional example.

7 is a cross-sectional view taken along the line AA of FIG.

FIG. 8 is an exploded perspective view of a conventional mounting structure.

FIG. 9 is a cross-sectional view showing various conventional mounting structure examples.

FIG. 10 is a cross-sectional view showing another example of a conventional mounting structure.

[Explanation of symbols]

 1 Tachograph (Large Instruments) 3 Meter Case 7 Front Plate 9 Transparent Plate 11 Tachograph Insertion Hole (Through Hole) 13 Inner Facing Portion 15 Facing Portion Inserting Hole (Through Hole) 17 Outer Facing Portion 17a Tip 21, 23, 25 Packing (Seal) Material 21a, 23a, 25b Convex part 21c, 23b Flat part 25a Sloping surface

Claims (3)

[Claims] 1. A transparent plate including the various instruments and covering the front plate is attached by ultrasonic welding to a meter case in which the various instruments are arranged on the front plate, and through holes provided in the front plate and the transparent plate, respectively. A large instrument protruding from the front side is attached to the meter case, and an inner facing part projecting to the transparent plate side is provided at the peripheral edge of the through hole of the front plate, and the transparent plate protrudes toward the front plate side at the peripheral edge of the through hole. , And an outer facing part located on the outer peripheral side of the inner facing part, and a ring-shaped sealing material is interposed between the tip of the outer facing part and the front plate. A structure for mounting a transparent plate on a front plate of a meter case, characterized in that a convex portion projecting to the transparent plate side is provided on an inner peripheral side with respect to a portion where the transparent plate contacts. 2. The sealing material is provided with a flat portion with which the tip of the outer facing portion comes into contact, and a convex portion that is bent from the flat portion and projects toward the transparent plate. A structure for mounting a transparent plate on the front plate of the meter case. 3. The meter case according to claim 1, wherein the convex portion of the sealing material is formed by providing an inclined surface extending from the inner peripheral side to the outer peripheral side on the surface on the transparent plate side. A structure for attaching a transparent plate to the front plate.