JPS5945270A - Sealing structure for air outlet in defroster grill - Google Patents

Abstract

PURPOSE:To secure the sectional area of ventilation flue yet larger, by making up an annular seal member into a taper form, in case of a structure sealing an interspace between coupling cylinders for both air outlets of a defroster grill and a defroster duct with the annular seal member. CONSTITUTION:A defroster grill 2 to be installed frontward in an instrument panel in front of a driver seat in a vehicle is provided with a slitilike air outlet 8 extending over in a car breadth direction, while an air outlet coupling cylinder 10 for duct use is extendedly set up toward the downside. This coupling cylinder 10 is connected with a defroster duct (unillustrated herein) via another coupling cylinder 13, while an interspace between both coupling cylinders 10 and 13 is externally fitted in by the coupling cylinder 10 and sealed up by an annular member 20 whose lower end part is pressed down to a seal receiving part 15 at the upper end of the coupling cylinder 13. In this case, the annular seal member 20 is formed by the way of installing a taper part 21, which becomes thinner in thickness by degress as it goes toward the end part, on the inner circumferential surface of parts other than the externally fitting part to the coupling cylinder 10.

Description

DETAILED DESCRIPTION OF THE INVENTION This invention prevents air leakage by connecting the slit of the defroster grille of the instrument paddle and the nozzle-shaped outlet of the defroster duct with an annular seal part. The present invention relates to an air outlet seal structure for a defroster grill.

Conventional differential zero star grill blowout! - As for the structure,
For example, there are those shown in FIGS. 1 to 3.

In the figure, reference numeral 1 is an instrument panel made of synthetic resin in front of the driver's seat of the vehicle, and 2 is a defroster grill installed in a portion of the instrument panel 1 on the front side of the vehicle.

An upper end portion of a dasher and a collar 3 is disposed on the 014 side of the defroster grille 2, and an upper end portion of a cowl top 4 is joined to the upper end portion. The lower end of the windshield 5 is bonded with adhesive C to the upper end portion where the sure flap panel 3 and cowl top 4 are joined.

A defroster duct 7 is attached to the exterior surface of the dash upper panel 3 on the indoor side via an L-shaped bracket 6f, and is disposed directly below the defroster grille 2.

As shown in FIG. 1, the defroster grille 2 is provided with two slit-shaped outlets 8.
The opening edge 9 of the duct is connected to a duct outlet extending toward the floor. i10 are installed in series.

On the other hand, for defroster performance) 7, duct outlet connection tube 1
A nozzle-shaped outlet 11 is provided at a position corresponding to 0.

The nozzle-shaped outlet 11 is formed to have a larger width than the slit-shaped outlet 8. Further, a grill outlet connecting tube 13 extending toward the defroster grille 2 side is connected to the mouth edge 12 of the nozzle-shaped outlet 1. A seal receiving portion 15 is connected to the opening edge 4 of the grill outlet connecting tube 13, extending horizontally outward and having a tip thereof raised toward the defroster grille 2 side.

A part of the inner circumferential surface 16a of a deformable annular seal member 16 made of urethane resin is adhered to the outer circumferential surface IQa of the duct outlet connecting tube 10 connected to the differential zero star grill 2 with adhesive. ing. The annular seal member 16 has a constant wall thickness and is rectangular in longitudinal section. The reason why there is a gap P between the defroster grille 2 and the annular seal member 16 is to absorb the error necessary to keep the dimension t of the annular seal member 16 extending from the connecting cylinder 10 constant, and to absorb the gap P between the annular seal member 1
This is because it is easy to paste No. 6.

The seal receiving portion 15, which is connected to the defroster duct 7, is pressed to the peripheral portion of the floor-side peripheral end surface 16b of the annular seal portion 16 fixed to the duct outlet connecting tube 10 in this manner.

In this way, the duct outlet connecting tube 10 connected to the slit-shaped outlet 8 of the defroster grille 2, the defroster duct 79, the grill outlet connecting surface 13 connected to the nozzle-shaped outlet 11, and the annular seal portion vJ16. They are tightly connected to prevent air leakage.

This annular seal member 16 is compressed and deformed by about 1107n to accommodate an error in the vertical mounting position of the defroster grille 2 and the defroster duct 7.

However, in such a conventional defroster grille outlet 1 seal structure, the duct outlet connecting tube 1
The wall thickness of the deformable annular seal part 16 that was adhered to the grille 0 and pressed by the seal receiving part 15 connected to the grill outlet connecting cylinder 13 was constant, and the longitudinal cross-sectional shape was rectangular. , when pressed by the seal receiver 15, the floor side end of the annular seal member 16 is compressed and deformed inward as shown in FIG. 3, and the inner diameter dimension L' of the floor side end is The width dimension of the grill outlet connection tube 13, that is, the nozzle-shaped outlet [111] is smaller than the width dimension of the outlet connecting tube 13,
The inner peripheral edge of the floor-side end of the annular seal member 16 protrudes into the grill outlet connection tube 13. Therefore, there are problems in that the ventilation portion of the grill outlet connecting tube 13 is narrowed, turbulent flow is caused depending on the degree of protrusion, and the predetermined direction of the air is disturbed, resulting in deterioration of defroster performance.

This invention was made by paying attention to such conventional problems, and the present invention has been made by focusing on the problems of the prior art. The purpose of this invention is to solve the above-mentioned problems by providing a tapered part where the butcher becomes gradually thinner.

Hereinafter, this invention will be explained based on the drawings.

Figures 4 and 5 are diagrams showing an embodiment of this system 1 (I). In the figures, parts or parts that are the same or equivalent to those of the conventional example are given the same reference numerals and duplicated. The explanation will be omitted.

First, to explain the structure, the annular seal member 20 that is bonded to the duct outlet connecting tube 10 and press-fitted by the seal receiver 15 connected to the grill outlet connecting tube 13 is made of urethane resin and is deformable. 0 The annular seal member 20 has an inner circumferential surface that is bonded to the outer circumferential surface of the duct outlet connection @1O, and a duct outlet connection fsH1 from the floor side Y111, which is the vertical part.
The floor-side open end of the duct outlet connecting tube 10, which is located when the outer circumferential surface 10a of 0 is adhered to the current sealing member 20], the wall thickness increases as it goes toward the floor-side end in the part up to Ob. A tapered portion 21 that gradually becomes thinner is provided.

As shown in FIG.
The Taber angle θ is formed such that the Taber surface of the groove is approximately 30°. It is also possible to set the Taber angle θ to approximately 45°.

In this way, the annular sealing member 20 having the tapered portion 2 has its inner circumferential surface 20a with the tapered portion 21 left on the outer circumferential surface of the duct outlet connecting tube 10 connected to the defroster grille 2 with adhesive. ing. 6. A seal receiving portion 15 connected to the defroster duct 7 is pressure-welded to the floor-side peripheral end surface 20b adjacent to the tapered portion 21 of the annular seal member 20 fixed to the duct outlet 10.

Next, the action will be explained.

The assembly in which the duct outlet connecting tube 10 connected to the defroster grille 2 and the grill outlet connecting tube 13 connected to the defroster grille 7 are tightly connected by an annular sheath member 20 is as follows. First, the annular seal member 20 is attached to the outer periphery of the duct outlet connecting tube 10 by gluing the inner periphery 20a of the annular seal member 20 with an adhesive, leaving the teno part 21. After that, (fc1 annular seal member 20 The seal receiving portion 15 connected to the defroster duct 7 is pressed against the floor-side peripheral end 120b of the defroster duct 7, and the assembly is completed.

When the floor-side circumferential end surface 20b of the annular seal member 20 is pressed against the seal receiving portion 15, the convex side end of the annular seal portion side 20 is compressed and deformed inward, but the annular seal member 20 By taking compressive deformation into consideration in advance, there is no longer any protrusion of the chi, and the duct outlet connection tube 10 and the grill outlet connection tube 13 are brought into close contact with each other by the annular sealing member 20 without narrowing the ventilation section in the grill outlet connection tube 13. connected to the state.

As described above, according to the present invention, the structure is such that the inner peripheral surface of the annular seal member that tightly connects the duct outlet connecting tube and the grill outlet connecting tube is connected to the duct outlet connecting tube. Since a tapered part is provided in the part other than the part that is bonded to the outer peripheral surface of the connecting cylinder, the wall thickness of which becomes gradually thinner toward the end, the floor-side peripheral end surface of the first annular seal member is pressed against the seal receiving part to form an annular seal. Even if the floor side end of the member is compressed and deformed inward, the tapered part is provided in consideration of the compressive deformation in advance, so that the inner peripheral edge of the floor side end of the annular seal member is connected to the grill outlet connecting tube. It will no longer protrude inside. Therefore, when the annular seal member is tightly connected to the grille soft outlet connecting tube, the ventilation portion within the grill outlet connecting tube is not narrowed.

[Brief explanation of the drawing]

Figure 1 is a perspective view showing an instrument panel equipped with a conventional defroster grille outlet seal structure;
14 is a sectional view taken along the line 1'-11 in Fig. 1, No. 3v is an enlarged sectional view showing the essential parts of the blow-off Losseal structure, and Figure ¥S4 is a drawing of the blow-off Losseal of the defroster grille which is an embodiment of the present invention. A cross-sectional view showing a state in which an annular seal member is bonded to a duct outlet connecting tube, Fig. 5 is a perspective view showing an annular seal member of the same blow-out seal structure, and Fig. 6 shows a main part of the same blow-out seal structure. FIG. 2... Defroster grill, 7... Defroster duct, 8,... Slit-shaped air outlet, 9... Mouth edge, 10
...Duct outlet connection tube, 10a...Outer periphery 111
1... Nozzle-shaped outlet, 13... Grill outlet [-
1fJj: Conclusion, 15... Seal receiver, 20...
Annular seal portion opening, 20a...inner circumferential surface, 20b...floor side circumferential end surface. Fig. 2-378-, Fig. 3, Fig. 4, Fig. 20, Fig. 6-3'.

Claims (1)

[Claims] A portion of the inner circumferential direction of a deformable annular seal member is adhered to the outer circumferential surface of a duct monthly outlet connecting tube that is connected to the slit-shaped outlet of the defroster grill and extends toward the floor. , a defroster duct disposed below the slit-shaped outlet has a width dimension larger than that of the slit-shaped outlet, and is connected to the nozzle-shaped outlet and extends from the grill outlet connecting tube extending toward the defroster grill side. In the air outlet seal structure of a defroster grill, the air outlet seal structure of a defroster grill includes a seal receiving portion extending horizontally outward and pressed against a floor-side circumferential end surface of the annular seal member, wherein the inner circumferential surface of the seal member is connected to the duct. An air outlet seal structure for a defroster grill, characterized in that a tapered part whose wall thickness gradually becomes thinner toward the end is provided in a part other than the part that is bonded to the outer peripheral surface of a monthly outlet connecting cylinder.