JP4713191B2 - Seal structure of vehicle side mirror - Google Patents

Description

  The present invention relates to a seal structure of a vehicle side mirror for rearward confirmation provided outside the vehicle.

  2. Description of the Related Art In general, a side mirror mounted on a vehicle such as an automobile includes a mirror base for attaching a mirror body incorporating a reflector to a vehicle body. Various seal structures between the mirror base and the vehicle body are known.

  For example, when the mirror base is attached to the vehicle body, a seal rubber that plays a role of waterproofing, dustproofing, vibration proofing, and preventing peeling of the painted surface is interposed. Specifically, the seal rubber is assembled to the mirror base in a state where butyl tape or the like is attached to the outer periphery of the mounting surface of the mirror base, and the mirror base is attached to the vehicle body (see Patent Document 1).

  However, in such a structure, when the soft member and the hard member are separately formed and the members are combined by bonding or the like, there is a problem that extra man-hours for preparation and assembly are required.

  Therefore, as shown in FIG. 7, an improved seal structure is adopted in which a seal rubber 54 is interposed between the mirror base 52 and the vehicle body 53 by compressing them. Here, the rib 521 is formed along the outer periphery of the mirror base 52, and a seal lip 546 is formed on the entire back surface of the seal rubber 54 formed in a plane (in the same figure, The state before deformation is indicated by a two-dot chain line).

Then, the seal rubber 54 is compressed by connecting the mirror base 52 and the vehicle body 53 with a pin (not shown) with the seal rubber 54 interposed between the mirror base 52 and the vehicle body 53. Then, as indicated by the circled portion in the figure, the rib 521 of the mirror base 52 comes into contact with the surface of the seal rubber 54, and the seal lip 546 on the back surface is pressed against the vehicle body 53 to be deformed. The space between the mirror base 52 and the vehicle body 53 is sealed by being compressed.
Japanese Laid-Open Patent Publication No. 2001-150483

  In the improved seal structure, the compression amount of the seal lip 546 is set to be constant over the entire circumference. However, since the mirror base of the side mirror 51 is made of a hard member, the seal rubber 54 which is a soft member is used. Even when the compression reaction force from the seal lip 546 is applied, significant deformation does not occur. However, since the vehicle body temperature is as high as 80 ° C. under the hot summer heat, the mirror base 52 may be softened and the mirror base 52 of the side mirror 51 may be warped due to the compression reaction force of the seal lip 546.

  The amount of this warping is the distance between the vehicle body mounting boss (not shown) of the mirror base 52 and the seal lip 546 or the vehicle body mounting boss (not shown) of the mirror base 52 and the mirror base touch line (the rib 521 and the seal rubber 54 of the mirror base 52). Depending on the distance from the touch line 547, the mirror base 52 may be greatly deformed.

  In order to eliminate such inconvenience, it is necessary to take measures by increasing the thickness of the mirror base 52 or changing the shape of the seal lip 546. In that case, by manufacturing an electrode for processing the mold of the mirror base 52, There was a problem that the cost of remodeling was high. In addition, when a design is provided with a gap in consideration of thermal deformation, a separate cushion needs to be added or an electrode must be manufactured to correct the mold, causing similar problems.

  The present invention has been made to solve such a problem, and an object of the present invention is to provide a seal structure for a vehicle side mirror capable of reliably eliminating thermal deformation of a mirror base at a low cost.

  The present invention relates to a seal structure for a vehicle side mirror in which a seal member is interposed in a compressed state between a base member of the vehicle side mirror and the vehicle body, and the vehicle body in the compressed state along an outer periphery on one surface side of the seal member. And a portion that contacts the base member in the compressed state and a portion that is separated from each other along the outer periphery on the other surface side of the seal member.

  According to a second aspect of the present invention, a rib is formed along the outer periphery of the base member, and a seal groove into which the rib can be fitted is formed on the other surface side of the seal member. The contact portion and the separation portion between the seal member and the base member may be formed by changing the general depth.

  As in the third aspect of the present invention, a seal lip that contacts the vehicle body in the compressed state may be formed along the outer periphery of one surface side of the seal member.

  As in a fourth aspect of the invention, a seal groove may be formed by projecting a part of one surface side of the seal member and recessing the projecting portion on the other surface side of the seal member.

  According to a fifth aspect of the present invention, a seal lip that contacts the vehicle body in the compressed state may be formed along the protruding portion of the seal member.

  According to the present invention, a portion (seal lip) that contacts the vehicle body in the compressed state is provided along the outer periphery on the one surface side of the seal member, and the base in the compressed state is disposed along the outer periphery on the other surface side of the seal member. Since the part where the member abuts (mirror base touch line) and the part (gap) apart from each other are provided, the distance between the vehicle body mounting boss and the seal lip, or the distance between the vehicle body mounting boss and the mirror base touch line can be determined. Even in the case of the layout, it becomes easy to adjust the compression reaction force of the seal lip to an appropriate reaction force.

  And the compression reaction force of a seal lip is absorbed by the clearance gap between a sealing member and a base member, and the curvature by the softening of the base member of the side mirror under a sun can be prevented.

  In addition, since the range to be touched can be easily increased or decreased, it is possible to reduce the mold correction cost when the range is increased or decreased.

  Further, even when there is a large variation on the vehicle body side and it is necessary to set a large amount of lap for the seal lip, it is possible to suppress the reaction force to an appropriate level. Therefore, it is not necessary to set cushions other than the seal rubber later, and an increase in cost can be prevented.

  FIG. 1 is a side view showing the overall configuration of a vehicle side mirror according to an embodiment of the present invention. Hereinafter, as the side mirror, among the electric mirrors of a small passenger car, a side mirror attached to the right side of the vehicle body will be described, and the side mirror attached to the left side of the vehicle body is only symmetrical with this. The description is omitted.

  As shown in FIG. 1, the side mirror 1 includes a mirror base (corresponding to a base member) 2 attached to a vehicle body 3, and a mirror body (not shown) supported by the mirror base 2. A reflecting mirror and a driving device for the reflecting mirror are incorporated inside. A seal rubber (corresponding to a seal member) 4 is interposed between the mirror base 2 and the vehicle body 3, and the inside of the vehicle body is sealed from the outside while the seal rubber-4 is compressed. It has become.

  FIG. 2 is a bottom view of the mirror base as viewed from the direction A in FIG. The mirror base 2 is a molded product made of, for example, a hard synthetic resin, and its bottom surface has a substantially triangular shape, and the two sides except the bottom side in the figure are bent toward the front side so as to contact the vehicle body 3. is doing. A rib 21 having a constant height is formed along the bent portion 20 immediately inside the bent portion 20.

  At the inner side of the mirror base 2, mounting bosses 22, 22, and 22 are formed for supporting the mirror base 2 from the vehicle body 3, and the mounting bosses 22, 22, and 22 are hollowed to cut female screws. ing. The mounting bosses 22, 22, 22 are mutually connected by reinforcing members 22 a, 22 a, 22 a, and an appropriate space 22 b is formed inside thereof.

  Positioning bosses 23 and 23 for positioning the mirror base 2 on the vehicle body 3 and a coupler fixing portion 24 for fixing a coupler (not shown) are formed in the space 22b. In addition, positioning bosses 25, 25, 25 for positioning the seal rubber 4 while avoiding the ribs 21 are provided at the corner portion immediately inside the bent portion 20 of the mirror base 2.

  3 is a plan view of the seal rubber viewed from the mirror base side (corresponding to the front surface side and one surface side), and FIG. 4 is a plan view of the seal rubber viewed from the vehicle body side (corresponding to the back surface side and the other surface side). FIG. The seal rubber 4 is a molded product made of, for example, TPE (thermoplastic elastomer), and is formed in a substantially triangular shape having a size that fits into the bottom surface of the mirror base 2 as shown in FIGS. . That is, an inclined portion 40 corresponding to the bent portion 20 of the mirror base 2 is formed on the outer periphery of the seal rubber 4 (see FIGS. 5 and 6).

  A portion corresponding to the rib 21 of the mirror base 2 immediately inside the inclined portion 40 protrudes toward the vehicle body 3 side, and the rib 21 is formed by recessing the protruding portion 40a on the mirror base 2 side. Seal grooves 41 (41a, 41b) having appropriate depths that can be fitted are formed. Specifically, the shallow seal groove 41a and the deep seal groove 41a are formed mutually by changing the amount of the depression at regular intervals. A seal lip 46 having a predetermined height is formed on the back surface side of the protrusion 40a (see FIG. 4).

  Further, a large recess 42a corresponding to the space 22b defined by the mounting bosses 22, 22, 22 and the reinforcing members 22a, 22a, 22a of the mirror base 2 is formed on the inner side, and in the recess 42a. , Holes 42, 42, 42 corresponding to the mounting bosses 22, 22, 22 of the mirror base 2, holes 43, 43 corresponding to the positioning bosses 23, 23, and holes 44 corresponding to the coupler fixing portion 24 are provided. ing. Appropriate holes 45, 45, 45 are also provided in portions corresponding to the positioning bosses 25, 25, 25 of the corner portion of the mirror base 2.

  The vehicle body 3 has, for example, an assembly processing structure of a sheet metal made of a plurality of thin plates and a hard synthetic resin member, and the mirror base 2 is attached to the synthetic resin member via the seal rubber 4. . For this purpose, positioning holes (not shown) are formed in the synthetic resin member or the sheet metal portion at positions corresponding to the positioning bosses 23 of the mirror base 2, and the mounting boss 22 of the mirror base 2 is formed. , 22 and 22 are provided with mounting holes (not shown) in the respective portions.

  FIG. 6 is a view showing a state in which the side mirror is assembled, and includes a cross-sectional view taken along the line BB of FIG. 3 (indicated by a circle in the drawing). FIG. 5 is a view showing a state in which the side mirror is assembled, and includes a cross-sectional view taken along the line CC of FIG. 3 (indicated by a circle in the figure). Hereinafter, an example of the assembly method will be described.

  First, the seal rubber 4 is assembled to the bottom surface of the mirror base 2. Specifically, when the holes 43, 43 of the seal rubber 4 are inserted into the positioning bosses 23, 23 of the mirror base 2, the positioning bosses 25, 25, 25 of the mirror base 2 become the positioning holes 45, 45, 45 of the seal rubber 4. It matches. When the positioning bosses 25, 25, 25 are fitted into the positioning holes 45, 45, 45, the outer periphery of the seal rubber 4 is fixed to the bottom surface of the mirror base 2.

  The mirror base 2 to which the seal rubber 4 is fixed is attached to the vehicle body 3. Specifically, the positioning bosses 23, 23 of the mirror base 2 are inserted into the positioning holes of the vehicle body 3. Then, the mounting bosses 22, 22, 22 of the mirror base 2 match the mounting holes of the vehicle body 3, and a bolt (not shown) is inserted into the mounting bosses 22, 22, 22 through the positioning holes. Thus, the mirror base 2 is fixed to the vehicle body 3 with the seal rubber 4 interposed.

  At this time, as shown in FIG. 6, the rib 21 of the mirror base 2 is in contact with the bottom of the groove at the portion fitted in the shallow groove 41a, but is fitted into the deep groove 41b as shown in FIG. The joined portion is spaced from the groove bottom. Accordingly, the contact portion (mirror base touch line 47) and the separation portion (gap 48) are alternately formed between the rib 21 on the bottom surface of the mirror base 2 and the seal groove 41 on the surface of the seal rubber 4. The seal lip 46 on the back surface of the seal rubber 4 is pressed against the surface of the vehicle body 3 to be deformed, and the seal rubber 4 is further compressed. Thereby, the sealing property between the mirror base 2 and the vehicle body 3 is ensured.

  As described above, according to the present embodiment, the seal lip 46 that comes into contact with the vehicle body 3 in the compressed state is provided along the outer periphery on the back surface side of the seal rubber 4, and along the outer periphery on the front surface side of the seal rubber 4. Since the mirror base touch line 47 with which the mirror base 2 abuts in the compressed state and the gap 48 which is separated are provided, the distance between the mounting bosses 22, 22, 22 and the seal lip 21 to the vehicle body 3, or the vehicle body 3, the compression reaction force of the seal lip 46 can be easily adjusted to an appropriate reaction force regardless of the distance between the mounting bosses 22, 22, 22 and the mirror base touch line 47.

  Then, the compression reaction force of the seal lip is absorbed by the gap 48 between the seal rubber 4 and the mirror base 2, and the warp due to the softening of the mirror base 2 of the side mirror 1 under the hot sun can be prevented.

  Further, even when there is a large variation on the vehicle body 3 side and it is necessary to set a large amount of lap for the seal lip 46, it is possible to suppress the reaction force to an appropriate level. Therefore, it is not necessary to set cushions other than the seal rubber 4 later, and an increase in cost can be prevented.

  In the above embodiment, the height of the rib 21 of the mirror base 2 is made constant and the depth of the seal groove 41 of the seal rubber 4 is changed, but conversely, the seal groove 41 of the seal rubber 4 is changed. It is also possible to change the height of the rib 21 of the mirror base 2 while keeping the depth constant. Further, the interval when changing the depth of the seal groove 41 of the seal rubber 4 and the height of the rib 21 is not necessarily constant, and may be set in consideration of the reaction force distribution of the lip seal 46, for example. .

  Moreover, in the said embodiment, in the attachment state to the vehicle body 3 of the mirror base 2, the rib 21 of the lower part which rain water cannot easily enter, and the seal groove 41 of the rubber seal 4 corresponding to this are omitted. Of course, the rib 21 and the seal groove 41 may be provided on the entire circumference. Further, the mirror base 2 is not limited to an integral structure, and may be, for example, a multi-piece type mirror base.

  In the above embodiment, the mirror base 2 is attached to the synthetic resin member of the vehicle body 3, but the mirror base 2 may be attached to the sheet metal portion of the vehicle body 3.

  Moreover, although the said embodiment demonstrated the side mirror of the small passenger car, the application range of this invention is not restricted to this, For example, the side mirror of large vehicles, such as a bus and a truck, etc. may be sufficient. Further, the side mirror is not electrically operated and may be manually adjustable in angle.

It is a side view showing the whole composition of the side mirror for vehicles concerning one embodiment of the present invention. It is the bottom view seen from the A direction of FIG. 1 of a mirror base. It is the top view which looked at the seal rubber from the mirror base side. It is the top view which looked at the seal rubber from the vehicle body. It is a figure which shows the state which assembled the side mirror, Comprising: The BB sectional drawing of FIG. 3 is included. It is a figure which shows the state which assembled the side mirror, Comprising: CC sectional view taken on the line of FIG. It is sectional drawing which shows the state which assembled the side mirror of the prior art example.

Explanation of symbols

1 Side mirror 2 Mirror base (base member)
21 Ribs 22, 22, 22 Mounting boss 23, 23 Positioning boss 24 Coupler fixing part 25 Positioning boss 3 Car body 4 Seal rubber (seal member)
41 seal groove 41a shallow seal groove 41b deep seal groove 42, 42, 42 hole 43, 43 hole 44 hole 45, 45, 45 hole 46 seal lip 47 mirror base touch line 48 gap

Claims (5)

In the seal structure of the vehicle side mirror in which the seal member is interposed in a compressed state between the base member of the vehicle side mirror and the vehicle body,
While providing a portion that contacts the vehicle body in the compressed state along the outer periphery of one surface side of the seal member,
A seal structure for a side mirror for a vehicle, wherein a portion where the base member abuts and a portion where the base member abuts in the compressed state is provided along the outer periphery on the other surface side of the seal member.   A rib is formed along the outer periphery of the base member, and a seal groove into which the rib can be fitted is formed on the other surface side of the seal member. By changing the relative depth of the seal groove with respect to the rib, the seal is formed. 2. The seal structure for a vehicle side mirror according to claim 1, wherein a contact portion and a separation portion between the member and the base member are formed.   The seal structure for a side mirror for a vehicle according to claim 1, wherein a seal lip that contacts the vehicle body in the compressed state is formed along an outer periphery on one surface side of the seal member.   3. The vehicle side according to claim 1, wherein a seal groove is formed by projecting a part of one surface side of the seal member and recessing the projecting portion on the other surface side of the seal member. Mirror seal structure.   5. The seal structure for a vehicle side mirror according to claim 4, wherein a seal lip that contacts the vehicle body in the compressed state is formed along the protruding portion of the seal member.

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