JP2003154895A - Sealing structure of motor-driven retractable mirror for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily seal a cylindrical part 8a in a motor-driven retractable mirror when lead wires 12b piercing through an oscillation support shaft 11a disposed in a storage chamber 7 are inserted into the cylindrical part 8a formed in a cover body 8. SOLUTION: An elastic foaming sheet material is made to be a seal material 13, which is shaped so that the winding start end 13a of the seal material is narrow and the winding finish end 13b is wide. The seal material 13 is spirally wound around the lead wires 12b by using adhesive double coated tapes 14 and 15 in a fusiform shape, and the wound seal material 13 is forced/inserted into the cylindrical part 8a.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technical field of an electric retractable mirror for a vehicle mounted on a vehicle such as a passenger car.

[0002]

2. Description of the Related Art Today, electric storage mirrors are often used in vehicles. The electric storage mirror has a housing (body) in which a mirror body is incorporated in a stay fixed to the vehicle side so that the angle of the mirror body can be adjusted. The swinging displacement can be performed between the use position and the storage position. In this structure, an electric motor for adjusting the angle of the mirror body and an electric motor for storage are housed in the housing, and it is necessary to draw lead wires for supplying power to these electric motors into the housing. By the way, as shown in FIGS. 1, 2, 3 or 6, the electric storage mirror is attached to the stay 9 provided on the vehicle body side.
Base plate 1 on which swing support shaft 11a of housing 1 is provided
1 is integrally fixed, while a bracket 2 provided in the housing 1 is formed with a storage chamber 7 in which a storage mechanism 6 including an electric motor 5 for storage is stored in a peripheral wall shape, and a swing support shaft 11a. Is immersed in the storage chamber 6 so as to be assembled and interlocked with the storage mechanism, and the housing 1 is swingably displaced between a use position and a storage position based on forward and reverse driving of the electric motor 5. There is. In this structure, the swing support shaft 11a is generally cylindrical, and the inside of the swing support shaft 11a serves as a lead-in space for the lead wire 12. In such an electric storage mirror, water such as rainwater and washing water easily enters the housing 1, and it is attempted to cover the storage chamber 6 with the cover body 8 so that the invaded water does not affect the storage mechanism. And in that case,
A cylindrical portion 8a is formed on the cover body 8 so as to follow the swing support shaft 11a, and the lead wire 12 is drawn into the housing 1 through the swing support shaft 11a and the cylindrical portion 8a. It is necessary to use a part (two) 12a of 12 for power supply of the electric storage motor 5, so that a part 12a of the lead wire is not passed through the cylindrical portion 8a from the swing support shaft 11a. Lead-out, remaining lead 12b
Will be passed through the cylindrical portion 8a. Therefore, a space S is provided between the swing support shaft 11a and the cylindrical portion 8a to secure the space for pulling out the space. However, in such a case, it is expected that the water that has entered the housing 1 will enter the storage chamber 7 through the cylindrical portion 8a, and conventionally, as shown in FIG. 6, the cylindrical portion 8a is sealed with the sealing material 21. Therefore, water was prevented from entering the storage room 7.

However, in the above-mentioned conventional one, it is proposed to use a ring-shaped elastic packing as the sealing material. However, since a plurality of lead wires are in a bundle, it is inevitable that the packing between the lead wires has a small repulsion. There is a problem in that a gap is generated in the gap and the sealing performance is impaired. If the gap is tight and the repulsion is increased, the work of inserting the packing into the cylindrical portion 8a is troublesome. Therefore, it is attempted to seal the sealing material by filling the cylindrical portion 8a with a jelly-like (semi-solid solution) unreacted substance and causing a solidification reaction. In such a case, the sealing material 21 Immediately after filling, there is a risk that it will flow out from the cylindrical portion 8a because it is in an unreacted state. Therefore, after the sealing material 21 is filled, the sealing material 21 is cured and left standing (leave). ) Is required (cured) and productivity is poor, and there is a problem to be solved by the present invention.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances in order to solve these problems, and it is fixed to the vehicle side and has a hollow swing support shaft. A base plate formed with the electric storage mechanism, a bracket swingably supported by the swing support shaft in a storage chamber accommodating the electric storage mechanism, and a cover body that covers the storage chamber. In a vehicle electric retractable mirror configured to draw out a lead wire for feeding power to the mirror angle adjusting mechanism from inside the swing support shaft through a cylindrical portion formed in the cover body, the lead wire is drawn out into a tubular shape. In sealing the part, the seal is configured by pressing a shrinkable sheet-shaped sealing material around a lead wire and inserting the same into a tubular part by press-fitting. Electric for vehicle A seal structure of paid mirror. By doing so, the sealing at the tubular portion is simple, and there is no need for curing, and it is possible to immediately shift to the next assembling step. In this case, the sealing material can be characterized by being made of a resin foam, and in this case, the resin foam has a closed cell ratio of 30 to 70%. By doing so, it becomes possible to have both the assembling property and the sealing property. Further, in this case, at least one surface of the resin foam can be characterized in that it has a skin-like shape, and by doing so, the sealing property can be further improved. In these, the sealing material can be characterized in that the winding start end side of the lead wire is tapered and the winding end side is wide. And in this one,
The seal material wrapped around the lead wire can be characterized by a small diameter at the insertion tip side into the tubular part, and the seal material wrapped around the lead wire has a large diameter in the middle part and at both ends. It can be characterized by having a spindle shape with a smaller diameter, and in this case, the sealing material can be easily inserted into the tubular portion. In these, the winding end of the sealing material can be characterized in that it is adhered to the already wrapped sealing part side with a double-sided adhesive tape,
By doing so, the final assembly of the sealing material becomes a one-touch operation. Further, in these, the winding start end of the sealing material can be characterized in that it is adhered to the lead wire with a double-sided adhesive tape, and by doing so, the process of starting the assembling of the sealing material becomes easy. In this, the double-sided adhesive tape for adhering the winding start end of the sealing material has a length corresponding to the width of the sealing material,
It can be characterized in that the edge portion of the sealing material protruding from the already wound sealing portion when the sealing material is wound is adhered to the lead wire. The protruding edge portion is firmly adhered to the lead wire, which ensures the winding process. In these articles, a water-repellent material can be applied to the surface of the wound sealing material, and by doing so, further intrusion of water can be prevented. In this case, the water-repellent material can be characterized by being a lubricant, and in such a case, the surface of the seal material is lubricated, which facilitates press fitting of the wound seal material. Improves workability.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION Next, embodiments of the present invention will be described based on the drawings. In the drawings, 1
Is a housing constituting an electric storage mirror, and the housing 1 has a bowl shape, and a bracket 2 is integrally fixed to the inside thereof. At the tip of the bracket 2,
A casing 3 incorporating a mirror drive mechanism including an electric motor is incorporated, and a mirror body 4 is incorporated in the casing 3 such that its angle can be adjusted. On the other hand, a storage chamber 7 for housing the storage mechanism 6 including the electric motor 5 is formed at the base end of the bracket 2 so as to project in a peripheral wall shape, and the storage chamber 7 has an upper opening at the storage chamber 7. A cover body 8 for covering 7 is fixed. On the other hand, 9 is a stay attached to the vehicle body side, and a base plate 11 is fixed to the stay 9 via a screw 10, and a cylindrical rocking support shaft 11a is formed on the base plate 11 so as to project therefrom. Has been done. And the base plate 11
Is a part of the storage mechanism 6 that is incorporated in a state where the swing support shaft 11a is retracted into the storage chamber 7, and the housing 1 supports the swing support shaft 11a based on the forward and reverse drive of the electric motor 5. As described above, it is the same as the conventional one such that it is swingably displaced between the use position and the storage position.

Reference numeral 12 is a lead wire for supplying electric power to the mirror drive mechanism and the storage mechanism 6, and the lead wire 12 is
Although it is drawn into the storage chamber 7 through the inner cylindrical surface of the swing support shaft 11a, a concentric cylindrical portion 8a is formed in the cover body 8 with a gap S between the tip of the swing support shaft 11a. Among the lead wires 12, the lead wire 12a for supplying power to the electric motor 5 for the storage mechanism has the gap S.
The lead wire 12b is pulled into the housing 1 through the cylindrical portion 8a and is connected to the mirror drive mechanism side. Has become. The seal material 13 embodying the present invention is wound around the lead wire 12b drawn into the housing 1 through the cylindrical portion 8a. The sealing material 13 is forcibly drawn into the cylindrical portion 8a while being wound around the lead wire 13b, as will be described later, and exerts a waterproof function.

The sealing material 13 is made of a flexible resin foam such as polyurethane foam or silicone foam, and the one having a high closed cell rate (low communication) has a good sealing property but contracts. Less, cylindrical part 8a
There is a problem that the repulsive force becomes large when it is forcibly drawn in and it is difficult to draw it in. On the other hand, the one having a low closed cell rate (high communication) is easy to be drawn into the cylindrical portion 8a, but has a sealing property. There is a problem of being damaged, and when these are taken into consideration, the closed cell ratio of the foam is 30% to
It is preferably about 70%, but in the present embodiment, about 50% is adopted. In order to further improve the sealing property, it is preferable that at least one side surface has a skin-like shape. Further, it can be said that a material having water repellency is preferable as the sealing material 13.

Next, regarding the sealing material 13, as shown in FIG. 4, the winding start end 13a side is tapered and the winding end end 13b side is widened on both sides, and the lead wire 12 is formed.
It has a spindle shape when wound around b, and as a specific shape, in the present embodiment, it has a trapezoidal shape in which the winding start end 13a is truncated. The lead wire 12b extends from the winding start end 13a to the winding end end 13b.
Is wound in a spiral shape, and the winding end end 13b is bonded by using a bonding means such as the double-sided adhesive tape 14. Further, in this case, the winding start end 13a can be firmly fixed to the lead wire 12b by adhering the winding start end 13a to the lead wire 12b with the double-sided adhesive tape 15, but the double-sided adhesive tape 15 corresponds to the width of the sealing material 13. By winding the sealing material 13 around what is adhered to the lead wire 12b by an amount, the edge portion that becomes wider toward the winding end end 13b side and sticks out from the already wound seal part is adhered to the lead wire 12b. As a result, the winding operation of the spindle shape in which the both ends of the sealing material 13 are prevented from collapsing and the central portion is swollen and the winding shape is maintained more reliably. Further, in the present embodiment, grease, which is a lubricant, is applied to the surface of the wound seal material 13.

In the embodiment of the present invention constructed as described above, the sealing material 13 is wound at the predetermined position of the lead wire 12b extending from the casing 3 in which the mirror drive mechanism is installed, from the winding start end 13a side in the tapered state. By winding up to the end 13b in a spiral shape, a spindle-shaped sealing material 13 is formed. In this state, if the lead wire 12b is pulled out of the housing 1 through the cylindrical portion 8a and the swing support shaft 11a. Of course, at this time, the sealing material 13 is incorporated by forcibly entering from the thin portion on the tip side to the thickest central portion in the cylindrical portion 8a in a compressed state, and a high waterproof function is provided. It will be demonstrated.

As described above, the sealing material 13 is made of a sheet material made of a foamed resin material having elasticity, and since it can be easily assembled by winding it in a spiral shape, the workability is excellent and the conventional sealing material is used. Unlike the case of filling unreacted material like a material, it is not necessary to cure for a long time, and it can be immediately sent to the next assembling step, which improves workability. In addition, the wound sealing material 13 has a taper shape on the winding start end 13a side and a wide width on the winding end end 13b side on both sides. It will be easy.
Moreover, the sealing material 13 employed in the present embodiment is widened toward both edges from the winding start end 13a to the winding end end 13b, and is formed in a line symmetrical shape having a symmetrical line in the winding direction. Therefore, if the winding start end 13a and the winding end end 13b are not mistaken, there is no upside down and the assembling property is good.

In addition, the sealing material 13 is the winding end 1
Since 3b is adhered by the double-sided adhesive tape 14 to prevent collapse of the roll, not only does it hinder the insertion work into the cylindrical portion 8a, but it is also prevented from losing its shape after the insertion, which is excellent waterproofing. It will function. Further, the winding start end 13a of the sealing material 13 is adhered to the lead wire 12b with the double-sided adhesive tape 15, so that the winding work can be facilitated and the shape can be prevented as in the winding end end 13b. The double-sided adhesive tape 15 has a width set to be substantially the same as the width of the winding end end 13b, and as a result of being adhered to the lead wire 12b, as the winding progresses, an edge protruding from the edge of the already wound one Since the portion adheres to the adhesive tape 15, the spindle shape is further prevented from losing its shape, and the waterproof function is further enhanced.

Moreover, in this case, since the surface of the wound sealing material 13 is coated with grease, the surface is lubricated, and as a result, the press-fitting work into the cylindrical portion 8a is facilitated and the workability is improved. Not only the grease itself,
Since it has water repellency, it is highly water repellent between the inner surface of the cylindrical portion 8a and the outer surface of the sealing material 13, and at the same time, the sealing material 13
At the time of press-fitting, a part of the grease is scraped off by the edge of the cylindrical portion 8a, and the grease is accumulated in the edge so as to block the mouth of the cylindrical portion 8a, further improving the waterproofness. To be achieved. Incidentally, as the material to be applied to the surface of the sealing material 13, it is sufficient that it has water repellency for improving the waterproof property, and not only mineral oil type grease but also various water repellent materials such as silicon type and fluorine type are used. Since these water repellent materials also have lubricity, workability and waterproofness can also be improved. Furthermore, the water-repellent material can be applied to the inner surface of the wound sealant 13 as long as it does not hinder the winding of the sealant 13 around the lead wire 12b. By doing so, the waterproof property is further improved. Needless to say, can be achieved.

The present invention is not limited to the above embodiment, and the shape of the sealing material 13 is, for example, as shown in FIGS. 5 (A) to (I). can do. Here, in the case of (A), the winding start end 13a has a sharpened shape, and the winding start end 13a has a wider triangular shape on both sides, and in the case of (B), the winding start end 13a side half is the same as the above ( A triangular shape similar to that of A) but a pentagonal shape (home base shape) in which a half portion on the winding end end 13b side has an equal width, and (C) is a winding start end of the above (B). 13a is a truncated hexagonal shape, (D) is a semi-circular shape, (E) is a semi-elliptical shape, and (F) is a bulge on both sides. The protruding shape, (G) has a shape in which both side edges are recessed in a curved shape, and (H) has a shape extending toward the cylindrical portion of the cover body on the winding start end 13a and winding end end 13b sides. Trapezoidal shape with the insertion side (lower side of the drawing) narrowing in the winding direction, (I) Has a triangular shape with a sharp tip on the winding start end 13a side, a uniform width in the middle part, and a sharp rear edge on the winding end end 13b side. Can be implemented. And, except for the one of (H), since it has a line-symmetrical shape as in the above-mentioned embodiment, there is no upside down.

[Brief description of drawings]

FIG. 1 is a partially cutaway front view of an electric storage mirror.

FIG. 2 is a horizontal sectional plan view of the electric storage mirror.

FIG. 3 is a partially cutaway front view of a bracket mounting member of the electric storage mirror.

FIG. 4A is an operation explanatory view showing a state before the start of winding,
(B) is an operation explanatory view showing a state after the end of winding.

5A to 5I are plan views showing another embodiment of the sealing material.

FIG. 6 is a partially cutaway front view of a conventional electric storage mirror.

[Explanation of symbols]

1 housing 2 bracket 4 mirror body 6 Storage mechanism 7 storage room 8 cover body 8a cylindrical part 11 base plate 11a Swing support shaft 12 lead wire 13 Seal material 13a winding start end 13b Winding end 14, 15 double-sided adhesive tape

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Katsutoshi Saito             135-10 Nishishinmachi, Ota-shi, Gunma Dai Co., Ltd.             Shima Electric Works F term (reference) 3D053 FF18 FF20 GG06 GG12 HH55                       JJ60 KK03 KK12 LL02

Claims (12)

[Claims] 1. A base plate fixed to a vehicle side, in which a hollow swing support shaft is formed, and a storage chamber accommodating an electric storage mechanism, which is swingably supported by the swing support shaft. A bracket and a cover for covering the storage chamber are provided, and a lead wire for supplying power to the mirror angle adjusting mechanism provided on the bracket is drawn out from inside the swing support shaft through a tubular portion formed on the cover. In sealing the tubular portion from which the lead wire is pulled out in the electric vehicle retractable mirror, the seal is formed by winding a contractible sheet-shaped sealing material around the lead wire. A seal structure for a vehicle electric retractable mirror, characterized in that it is configured to be press-fitted into a vehicle. 2. The seal structure for a vehicle electric storage mirror according to claim 1, wherein the sealing material is made of resin foam. 3. The seal structure for a vehicle electric retractable mirror according to claim 2, wherein the resin foam has a closed cell ratio of 30 to 70%. 4. The seal structure for a vehicle electric retractable mirror according to claim 2 or 3, wherein at least one surface of the resin foam body has a skin-like shape. 5. The electric retractable mirror for a vehicle according to claim 1, 2, 3 or 4, wherein the winding start end side of the lead wire is tapered and the winding end side is wide. Seal structure. 6. The seal structure for an electric retractable mirror for a vehicle according to claim 5, wherein the seal material wound around the lead wire has a small diameter at a tip end side thereof inserted into the tubular portion. 7. The seal structure for a vehicle electric retractable mirror according to claim 5, wherein the seal material wound around the lead wire has a spindle shape in which an intermediate portion has a large diameter and both end sides have smaller diameters. . 8. The seal structure for an electric retractable mirror for a vehicle according to claim 1, wherein the winding end of the sealing material is adhered to the already wound sealing portion side with a double-sided adhesive tape. 9. The seal structure for an electric storage mirror for a vehicle according to claim 1, wherein the winding start end of the sealing material is adhered to the lead wire with a double-sided adhesive tape. 10. The double-sided pressure-sensitive adhesive tape for adhering the winding start end of the sealing material according to claim 9, wherein the double-sided adhesive tape has a length corresponding to the width of the sealing material, and when the sealing material is wound, the already-wound sealing portion is wound. A sealing structure for a vehicle electric retractable mirror, wherein an edge portion of the sealing material protruding from the adhesive is bonded to a lead wire. 11. A seal structure for a vehicle electric retractable mirror according to claim 1, wherein a water repellent material is applied to a surface of the wound seal material. 12. The seal structure for a vehicle electric storage mirror according to claim 11, wherein the water repellent material is a lubricant.