JP6206652B2 - Door mirror mounting structure - Google Patents

Description

  The present invention relates to a door mirror mounting structure that can be folded when the vehicle is stopped.

  A door mirror attached to a side surface of a door of a vehicle (automobile or the like) is provided with an attachment member such as a base in order to hold the mirror. This door mirror faces the rear of the vehicle so that the driver can check the situation behind the vehicle when the vehicle is running. On the other hand, when the vehicle is stopped, it can be folded inward in the vehicle width direction.

  This folding operation, that is, the opening / closing operation of the mirror rotates, for example, around an axis fixed to the base. In order to perform such an operation, there is one that slides between a member to which a mirror is fixed and a base (for example, Patent Document 1). At this time, a predetermined load acts on the sliding surface. Some of the sliding surfaces slide on spherical surfaces around the shaft.

JP 2013-082300 A

  In the example described above, the flat surfaces are in contact with each other to form a sliding surface. For this reason, the load for sliding is increased. When the load necessary for sliding is increased, the operability is deteriorated particularly in the case of manual operation. In the above example, the contact is made between the flat surfaces, but the same applies to the contact between the spherical surfaces. When the sliding resistance increases, the operability deteriorates.

  The present invention has been made to solve the above-described problems, and an object thereof is to improve the operability of opening and closing the door mirror.

In order to achieve the above object, a door mirror mounting structure according to the present invention is a structure for mounting a door mirror configured to be folded inward in the vehicle width direction to a door on the side of the vehicle, and is provided on the outer side of the door in the vehicle width direction. A shaft member extending in the vehicle vertical direction, a retainer formed on the shaft member and formed with a substantially hemispherical first spherical surface facing the vehicle lower side, and provided on the vehicle width direction outer side of the door, A base having a second spherical surface that is recessed so as to face the first spherical surface, a housing configured to fix the mirror body, and a sliding portion sandwiched between the first spherical surface and the second spherical surface. In the door mirror mounting structure, the sliding portion includes a retainer side sliding surface that contacts the first spherical surface of the retainer and slides on the first spherical surface, and a second spherical surface of the base. Touch A base-side sliding surface that slides on the second spherical surface is provided, and includes a contact surface pair that includes the first spherical surface and the retainer-side sliding surface, and a second spherical surface and the base-side sliding surface. of the contact surfaces pair, at least one of the recesses on both sides constituting the opposing face of the contact surface pairs is provided et al is, the recess is provided at intervals in the circumferential direction around the shaft member.

  In the door mirror mounting structure according to the present invention, the depth of the concave portion provided on the retainer side sliding surface is deeper than the concave portion provided on the first spherical surface, and is provided on the base side sliding surface. The depth of the recessed portion formed is configured to be deeper than the recessed portion provided in the second spherical surface.

  Further, in the door mirror mounting structure according to the present invention, the retainer and the sliding portion are formed of different materials from each other, and the concave portion provided on the first spherical surface and the retainer side sliding surface are provided on the retainer side sliding surface. The depth of the concave portion is configured such that the concave portion provided in a direction formed of a material having a high coefficient of thermal expansion is deepened, and the base and the sliding portion are formed of different materials, and the first The depths of the recesses provided on the two spherical surfaces and the recesses provided on the base-side sliding surface are configured such that the recesses provided on the side formed of a material having a high coefficient of thermal expansion are deepened. ing.

  In the door mirror mounting structure according to the present invention, each of the recesses provided on the facing surfaces of the contact surface pair has an arc shape extending in the circumferential direction around the shaft member.

  In the door mirror mounting structure according to the present invention, the concave portion provided on the first spherical surface and the concave portion provided on the retainer side sliding surface are provided at positions facing each other and provided on the second spherical surface. The recessed portion provided on the base-side sliding surface is provided at a position facing each other.

  Further, in the door mirror mounting structure according to the present invention, a vehicle vertical direction width of the concave portion provided on the retainer side sliding surface is larger than a vehicle vertical direction width of the concave portion provided on the first spherical surface, The vehicle vertical direction width of the concave portion provided on the second spherical surface is configured to be larger than the vehicle vertical direction width of the concave portion provided on the base-side sliding surface.

  In the door mirror mounting structure according to the present invention, the recesses provided on the retainer side sliding surface and the recesses provided on the base side sliding surface are alternately provided in the circumferential direction.

According to the present invention, a door mirror configured to be folded inward in the vehicle width direction is a structure for attaching to a door on the side of the vehicle, and is disposed on the vehicle width direction outer side of the door and extends in the vehicle vertical direction. A shaft member, a retainer fixed to the shaft member and formed with a substantially hemispherical first spherical surface facing the lower side of the vehicle, and provided on the outer side in the vehicle width direction of the door and recessed so as to face the first spherical surface In a door mirror mounting structure comprising: a base on which a second spherical surface is formed; and a housing configured to fix a mirror body and provided with a sliding portion sandwiched between the first spherical surface and the second spherical surface. The sliding portion includes a retainer side sliding surface that contacts the first spherical surface of the retainer and slides on the first spherical surface, and a sliding surface that contacts the second spherical surface of the base and slides on the second spherical surface. The moving base side sliding surface Vignetting, the contact surface pairs comprising a first spherical and said retainer side sliding surface, as well, of the contact surface pairs of the second spherical and the base side slide surface, the opposing surface of the at least one contact surface pairs recesses provided we are on both sides constituting the said recess, so provided at intervals in the circumferential direction around the shaft member, to reduce the contact resistance at the sliding surface, the sliding resistance It becomes possible to improve. Furthermore, generation of frictional heat during sliding can be suppressed. Thereby, even if it is used for a long time for several years, it can make it hard to raise | generate a deformation | transformation. In addition, since the surfaces on the center side of the shaft member (inward in the radial direction with the shaft member as the center) are in contact with each other, it is possible to eliminate shaft blurring in the rotation operation of the mirror and to stabilize the rotation operation. .

  Further, according to the present invention, the depth of the concave portion provided on the retainer side sliding surface is deeper than the concave portion provided on the first spherical surface, and the base side sliding surface is provided with the depth. Since the depth of the recess is configured to be deeper than the recess provided in the second spherical surface, it is possible to suppress the mirror deformation accompanying the sliding from affecting the operability.

  Further, according to the present invention, the retainer and the sliding portion are formed of different materials, and the depth of the concave portion provided on the first spherical surface and the concave portion provided on the retainer side sliding surface. The base portion and the sliding portion are made of different materials, and the second spherical surface is formed on the second spherical surface. The depth of the recess provided in the provided recess and the base-side sliding surface is configured so that the recess provided in a material formed of a material having a high coefficient of thermal expansion is deep. It is possible to suppress deterioration of slidability due to thermal expansion (creep deformation).

  Further, according to the present invention, each of the concave portions provided on the opposed surfaces of the contact surface pair is arcuately extending in the circumferential direction around the shaft member, so that it is fixed to a portion that is easy to slide. It is possible to provide an easy-to-use part, and a moderation feeling is born in the sliding performance and the operability is improved.

  According to the present invention, the concave portion provided on the first spherical surface and the concave portion provided on the retainer side sliding surface are provided at positions facing each other, and the concave portion provided on the second spherical surface is provided. Since the concave portion and the concave portion provided on the base-side sliding surface are provided at positions facing each other, the contact area of the contact portion is increased, and the fixed state of the door mirror is stabilized. Moreover, since the said contact area becomes small during sliding, a sliding resistance reduces and it becomes easy to slide.

  According to the present invention, the vehicle vertical direction width of the concave portion provided on the retainer side sliding surface is larger than the vehicle vertical direction width of the concave portion provided on the first spherical surface, and the second spherical surface is provided. Since the vehicle vertical direction width of the concave portion provided in the vehicle is configured to be larger than the vehicle vertical direction width of the concave portion provided in the base side sliding surface, the radially inner surface of the shaft member Thus, the area where the outer surface is pressed can be reduced, the load can be reduced, and the deterioration of the sliding performance can be suppressed.

  Further, according to the present invention, since the concave portion provided on the retainer side sliding surface and the concave portion provided on the base side sliding surface are provided alternately in the circumferential direction, deformation of the housing is prevented. It is possible to suppress the deterioration of the sliding performance.

It is a schematic side view which shows one Embodiment of the door mirror attachment structure which concerns on this invention. It is a perspective view which shows the opening / closing operation | movement of the door mirror of FIG. It is a schematic perspective view which shows the door mirror attachment structure of FIG. It is a front sectional view of the door mirror of FIG. 3 and its mounting structure. It is an expanded sectional view of the door mirror attachment structure of FIG. FIG. 6 is an enlarged cross-sectional view around the sliding portion of FIG. 5. FIG. 2 is a top view of the base and the like in FIG. 1. It is a schematic perspective view of the retainer of FIG.

  Hereinafter, an embodiment of a door mirror mounting structure according to the present invention will be described with reference to the drawings. FIG. 1 is a schematic side view of the door mirror mounting structure of the present embodiment. FIG. 2 is a perspective view showing the opening / closing operation of the door mirror 10 of FIG. FIG. 3 is a schematic perspective view showing the door mirror mounting structure of FIG. 4 is a front sectional view of the door mirror 10 of FIG. 3 and its mounting structure.

  FIG. 5 is an enlarged cross-sectional view of the door mirror mounting structure of FIG. FIG. 6 is an enlarged cross-sectional view around the sliding portion 23 of FIG. FIG. 7 is a top view of the base 45 and the like in FIG. FIG. 8 is a schematic perspective view of the retainer 40 of FIG.

  The door mirror 10 of the present embodiment is configured to be visible from the front seat (driver's seat) of the vehicle when the vehicle is traveling, and to be folded inward in the vehicle width direction when the vehicle is stopped. The door mirror 10 is fixed in an opened state or a closed state. Here, the opened state (open state) is a state in which the door mirror 10 protrudes outward in the vehicle width direction and the vehicle rear side is visible from the driver's seat. The closed state (closed state) is a state in which the mirror body 11 is folded so as to face inward in the vehicle width direction.

  The door mirror 10 is switched from a closed state to an open state or from an open state to a closed state by rotating around a shaft 30 described later. Hereinafter, a structure for attaching the door mirror 10 to the vehicle side door 1 will be described.

  The door mirror mounting structure includes a housing 20, a shaft 30, a retainer 40, and a base 45. The housing 20 is made of resin and includes a mirror fixing portion 21 and a sliding portion 23.

  The mirror fixing portion 21 is a portion surrounding the mirror body 11. The sliding part 23 is provided so that it may be pinched | interposed into the 1st spherical surface 41 and the 2nd spherical surface 46 which are mentioned later. In this example, the mirror fixing part 21 and the sliding part 23 are integrally formed. The configuration of the sliding portion 23 will be described later.

  The shaft 30 is made of metal, and is a member that is disposed outside the door 1 in the vehicle width direction and extends in the vehicle vertical direction. In this example, it is a so-called bolt. The retainer 40 is made of metal, and is a hemispherical member that is fixed to the center of the shaft 30 in the longitudinal direction, in this example, approximately the center of the vehicle in the vertical direction. The shaft 30 penetrates the retainer 40 in the vehicle vertical direction. A lower surface of the retainer 40 on the lower side of the vehicle is formed with a first spherical surface 41 that is convex downward. The base 45 is made of the same resin as the housing 20, is fixed to the outside in the vehicle width direction of the door 1, and is recessed below the vehicle to form a second spherical surface 46 so as to face the first spherical surface 41. The second spherical surface 46 is a concave spherical surface corresponding to the first spherical surface 41.

  The shaft 30 is configured to penetrate the retainer 40 as described above, and the vehicle lower portion of the shaft 30 is fixed to the base 45. In addition, a coil spring 32 is attached to a disk-shaped stop member 31 projecting in the radial direction on the vehicle upper portion of the shaft 30. The coil spring 32 presses the retainer 40. The retainer 40 presses the base 45 with the sliding portion 23 interposed therebetween.

  Here, the sliding portion 23 of the housing 20 will be described. Since the sliding portion 23 is configured to be sandwiched between the first spherical surface 41 and the second spherical surface 46 as described above, the vehicle upper surface is a concave spherical surface and the vehicle lower surface is a convex spherical surface. The shaft 30 passes through the center of these surfaces. Hereinafter, the upper surface and the lower surface will be described.

  A retainer side sliding surface 24 is formed on the upper surface of the sliding portion 23, and a base side sliding surface 25 is formed on the lower surface. These sliding surfaces are provided on the front and back sides. The retainer side sliding surface 24 comes into contact with the first spherical surface 41 of the retainer 40 and slides on the first spherical surface 41. The retainer-side sliding surface 24 has a concave spherical shape that is recessed downward in the vehicle, and constitutes a first contact surface pair together with the first spherical surface 41. That is, the first contact surface pair is a contact between the hemispheres. The contact state is maintained by pressing the retainer 40 with the elastic force of the coil spring 32.

  The base-side sliding surface 25 contacts the second spherical surface 46 of the base 45 and slides on the second spherical surface 46. The base-side sliding surface 25 has a convex spherical shape that protrudes downward from the vehicle, and forms a second contact surface pair with the second spherical surface 46. Similar to the first contact surface pair, the second contact surface pair is a contact between the hemispherical surfaces. The contact state is maintained by pressing the retainer 40 with the coil spring 32.

  In the opening / closing operation of the mirror body 11, the sliding portion 23 rotates about the axis of the shaft 30, and the sliding portion 23 slides on the retainer 40 and the base 45. That is, the sliding part 23 becomes a movable member, and the retainer 40 and the base 45 are fixed members. In this example, the retainer side sliding surface 24 and the base side sliding surface 25 are movable surfaces, and the first spherical surface 41 and the second spherical surface 46 are fixed surfaces. Details of these operations will be described later.

  Concave portions are provided on the opposing surfaces of the first contact surface pair and the second contact surface pair. The recesses in this example are configured on each of the four surfaces constituting each contact surface pair. That is, in this example, there are four types of concave portions, that is, the first concave portion 51 to the fourth concave portion 54. The first recess 51 is provided on the first spherical surface 41, and the second recess 52 is provided on the retainer side sliding surface 24. The third recess 53 is provided on the base-side sliding surface 25, and the fourth recess 54 is provided on the second spherical surface 46. Each of the recesses 51 to 54 extends in the circumferential direction and further extends in the vehicle vertical direction.

  An abutting portion 35 is provided on the center side of the shaft 30 (radially inward with the shaft 30 as a center) with respect to the concave portions 51 to 54. The abutting portion 35 is a portion where the surfaces constituting each contact surface pair come into contact with each other. The contact portion 35 is a portion that receives a load pressed by the coil spring 32 or the like. In this example, the portion that is not a recess becomes the contact portion 35 (FIG. 6).

  Here, the relationship of the shape, depth, width, and the like for each of the recesses 51 to 54 will be described. The concave portions 51 to 54 provided on the respective surfaces are not provided over the entire circumferential area (circumferential direction) surrounding the shaft 30. That is, as shown in FIGS. 5 and 6, they are provided along the circumferential direction with the shaft 30 as the center and spaced apart from each other in the circumferential direction. As shown in FIG. 6, the first recesses 51 are provided at intervals in the circumferential direction, and the intervals become the contact portions 35.

  Moreover, the positional relationship of each recessed part 51-54 differs with the state in which the mirror main body 11 was fixed, and the state which is sliding. The state in which the mirror body 11 is fixed is the above-described open state and closed state. The sliding state is a state in which the mirror main body 11 rotates around the shaft 30 together with the housing 20.

  In a state where the mirror body 11 is fixed, the first recess 51 provided on the first spherical surface 41 and the second recess 52 provided on the retainer side sliding surface 24 face each other. The third recess 53 provided on the base-side sliding surface 25 and the fourth recess 54 provided on the second spherical surface 46 face each other. In a state where the mirror body 11 is fixed, the circumferential positions of the concave portions facing each other, that is, the first concave portion 51 and the second concave portion 52, or the third concave portion 53 and the fourth concave portion 54 are aligned.

  When the mirror body 11 is rotating, that is, when each surface of the sliding portion 23 slides on the first spherical surface 41 and the second spherical surface 46, the circumferential direction of the first concave portion 51 and the second concave portion 52 The position is shifted in the circumferential direction. The same applies to the third concave portion 53 and the fourth concave portion 54.

  The depth of the second recess 52 provided in the retainer-side sliding surface 24 is deeper than the first recess 51 provided in the first spherical surface 41, and the depth of the third recess 53 provided in the base-side sliding surface 25. The depth is deeper than the fourth recess 54 provided in the second spherical surface 46.

  In a state where the housing 20 is rotated, that is, the sliding portion 23 is slid, the inner surface with respect to the radial direction of the shaft 30 is fixed so as to press the outer surface. The first spherical surface 41 is outside the retainer side sliding surface 24, and the second spherical surface 46 is outside the base side sliding surface 25. Therefore, in this example, the first spherical surface 41 presses the retainer side sliding surface 24 and the base side sliding surface 25 presses the second spherical surface 46.

  The vehicle vertical direction width of the second recess 52 is larger than the vehicle vertical width of the first recess 51. Further, the vehicle vertical direction width of the fourth recess 54 is larger than the vehicle vertical direction width of the third recess 53. Here, the vehicle vertical width indicates the length between the upper end and the lower end of the vehicle in the recess (FIG. 4).

  The 2nd recessed part 52 and the 3rd recessed part 53 are provided alternately along the circumferential direction. That is, the third recess 53 is not provided on the base-side sliding surface 25 on the back side of the portion where the second recess 52 is provided. Similarly, the second recess 52 is not provided on the retainer side sliding surface 24 on the back side of the portion where the third recess 53 is provided.

  Next, the opening / closing operation of the door mirror 10 of this embodiment will be described. Here, the opening / closing operation is an operation of shifting from one (for example, the open state) of the door mirrors 10 fixed to the other (the closed state).

  When in the open state, as described above, the circumferential positions of the third recesses 53 and the fourth recesses 54 are also aligned with the circumferential positions of the first recesses 51 and the second recesses 52 aligned. At this time, the contact portion 35 adjacent to the first recess 51 in the circumferential direction and the contact portion 35 adjacent to the second recess 52 in the circumferential direction are in contact with each other. Similarly, the contact portion 35 adjacent to the third recess 53 in the circumferential direction and the contact portion 35 adjacent to the fourth recess 54 in the circumferential direction are in contact with each other.

  For example, when the door mirror 10 is moved manually to the closed state, the first recess 51 is in a state of facing the contact portion 35 of the retainer side sliding surface 24. Similarly, the second recess 52 is in a state of facing the contact portion 35 of the first spherical surface 41. That is, the contact area in the first contact surface pair is reduced. The same applies to the second contact surface pair.

  Further, when the first recess 51 and the second recess 52 are rotated in the same direction and are in the closed state, the circumferential positions of the first recess 51 and the second recess 52 are aligned, and the circumferential positions of the third recess 53 and the fourth recess 54 are also aligned. It becomes a state. Thereby, the contact area increases again, and the fixed state is stabilized.

  As can be seen from the above description, according to the present embodiment, by providing the first concave portion 51 to the fourth concave portion 54, it is possible to reduce the contact resistance on each sliding surface and improve the slidability. . Furthermore, generation of frictional heat during sliding can be suppressed. Thereby, even if it is used for a long time for several years, it can make it hard to raise | generate a deformation | transformation. Further, since the abutting portion 35 is provided on the inner side of the shaft 30 (inward in the radial direction with the shaft 30 as the center), it is possible to eliminate shaft blurring during the rotation operation of the mirror body 11, and to stabilize the rotation operation. It becomes possible to make it.

  The portion provided with the recess is easily deformed because the plate thickness is thinner than the portion where the recess is not provided. Furthermore, the movable member is more easily deformed between the fixed member and the movable member. That is, the sliding portion 23 of the housing 20 is more easily deformed than the retainer 40 and the base 45. When the concave portions (second concave portion 52, third concave portion 53) of the sliding portion 23 are deformed, there is a possibility that the concave portion (first concave portion 51, fourth concave portion 54) of the fixed member swells. This swollen portion is caught in the concave portions (the first concave portion 51 and the fourth concave portion 54) of the member on the fixed side during the rotation operation. This catch increases the load for performing the operation and deteriorates the operability.

  On the other hand, in this embodiment, the depth of the recessed parts 51-54 is set as mentioned above. Thereby, it can suppress that the deformation | transformation of the mirror main body 11 accompanying sliding affects operability.

  In the state where the mirror body 11 is fixed, the circumferential positions of the first recess 51 and the second recess 52 are aligned, and the circumferential positions of the third and fourth recesses 54 are aligned. The contact area of the contact surface including 35 is increased, and the fixed state of the door mirror 10 is stabilized. Moreover, since the said contact area becomes small during sliding, a sliding resistance reduces and it becomes easy to slide.

  The retainer side sliding surface 24 is on the radially outer side of the shaft 30 with respect to the first spherical surface 41, and the second spherical surface 46 is on the radially outer side with respect to the base side sliding surface 25. In this example, the inner surface with respect to the radial direction of the shaft 30 presses the outer surface.

  In such a state, since the vertical width of the concave portions 51 to 54 of each surface is set as described above, the area of the portion where the outer surface is pressed is reduced by the radially inner surface of the shaft 30. It is possible to reduce the load, and the deterioration of the sliding performance can be suppressed.

  If the recesses 51 to 54 are provided on each contact surface, the strength may be insufficient. In particular, since the sliding portion 23 is provided with the recesses 52 and 53 on the front and back, there is a possibility that a portion where the plate thickness is reduced is generated. On the other hand, in the present embodiment, the circumferential positions of the second recesses 52 and the third recesses 53 are alternately provided, so that the circumferential positions of these recesses 23 and 24 are the same, so that the sliding portion Accordingly, it is possible to prevent the thickness of the housing 23 from becoming thin and to prevent the strength from becoming excessively insufficient, thereby suppressing the deformation of the housing 20. As a result, deformation can be suppressed even in long-term use, and deterioration of operability can be suppressed.

  The description of the above embodiment is an example for explaining the present invention, and does not limit the invention described in the claims. Moreover, each part structure of this invention is not restricted to the said embodiment, A various deformation | transformation is possible within the technical scope as described in a claim.

  For example, in this embodiment, although the recessed parts 51-54 are provided in the 1st contact surface pair and the 2nd contact surface pair, respectively, it is not restricted to this. You may provide in any one contact surface pair among a 1st contact surface pair and a 2nd contact surface pair. Even in this case, the concave portions are provided on both surfaces constituting the contact surface pair.

  In the above example, the shaft 30 and the retainer 40 are made of a metal material, and the base 45 and the housing 20 are made of a resin material. However, the present invention is not limited to this. Furthermore, in the above example, the base 45 is made of the same resin as the housing 20, but is not limited thereto.

  About the 1st recessed part 51 and the 2nd recessed part 52, you may comprise so that the recessed part provided in the direction formed with the material with a large thermal expansion coefficient among the retainer 40 and the sliding part 23 may become deep. Similarly, the third recessed portion 53 and the fourth recessed portion 54 may be configured such that the recessed portion provided on the base 45 and the sliding portion 23 that is formed of a material having a high thermal expansion coefficient is deepened. .

  Automobile parts are used for a long time for several years. Furthermore, since the mirror body 11 is provided outside the passenger compartment, it is easily affected by heat. In particular, hot air in the summer tends to be trapped in the space inside the parts. Further, the retainer 40, the housing 20 and the base 45 are mixed with resin parts and metal (sheet metal) parts. Furthermore, even if it is resin parts, members with different thermal expansion coefficients may be contacted. Even in such a case, by increasing the depth of the concave portion on the member side made of a material having a large coefficient of thermal expansion, the bulge (expansion) associated with the thermal deformation may be reduced by the counterpart member (one having a smaller coefficient of thermal expansion). It is possible to prevent the deterioration of operability in the long term.

DESCRIPTION OF SYMBOLS 1 Door 10 Door mirror 11 Mirror main body 20 Housing 21 Mirror fixing | fixed part 23 Sliding part 24 Retainer side sliding surface 25 Base side sliding surface 30 Shaft (shaft member)
31 Stopping member 32 Coil spring 35 Contact portion 40 Retainer 41 First spherical surface 45 Base 46 Second spherical surface 51 First concave portion 52 Second concave portion 53 Third concave portion 54 Fourth concave portion

Claims (6)

A structure for attaching a door mirror configured to be folded inward in the vehicle width direction to a door on the side of the vehicle,
A shaft member disposed outside the door in the vehicle width direction and extending in the vehicle vertical direction;
A retainer fixed to the shaft member and formed with a substantially hemispherical first spherical surface facing downward of the vehicle;
A base provided with a second spherical surface provided outside the door in the vehicle width direction and recessed so as to face the first spherical surface;
A housing configured to fix a mirror body and provided with a sliding portion sandwiched between the first spherical surface and the second spherical surface;
In the door mirror mounting structure having
The sliding portion includes a retainer side sliding surface that contacts the first spherical surface of the retainer and slides on the first spherical surface, and a sliding surface that contacts the second spherical surface of the base and slides on the second spherical surface. A moving base side sliding surface is provided,
A contact surface pair composed of the first spherical surface and the retainer side sliding surface, and a contact surface pair composed of the second spherical surface and the base side sliding surface constitute at least one contact surface pair. Recesses are provided on both sides ,
The door mirror mounting structure , wherein the recesses are provided at intervals in a circumferential direction centering on the shaft member .   The depth of the concave portion provided on the retainer side sliding surface is deeper than the concave portion provided on the first spherical surface, and the depth of the concave portion provided on the base side sliding surface is the first depth. The door mirror mounting structure according to claim 1, wherein the door mirror mounting structure is configured to be deeper than the concave portion provided on two spherical surfaces. The retainer and the sliding portion are formed of different materials, and the depth of the concave portion provided on the first spherical surface and the concave portion provided on the retainer side sliding surface has a large coefficient of thermal expansion. It is configured so that the concave portion provided in the material is deepened,
The base and the sliding portion are formed of different materials, and the depth of the concave portion provided on the second spherical surface and the concave portion provided on the base-side sliding surface has a large coefficient of thermal expansion. The door mirror mounting structure according to claim 1, wherein the concave portion provided in a direction formed of a material is deepened. The concave portion provided on the first spherical surface and the concave portion provided on the retainer side sliding surface are provided at positions facing each other, and the concave portion and the base side sliding surface provided on the second spherical surface. The door mirror mounting structure according to claim 1 , wherein the recesses provided in the door are provided at positions facing each other . The vehicle vertical width of the recess provided on the retainer side sliding surface is greater than the vehicle vertical width of the recess provided on the first spherical surface,
The vehicle vertical direction width of the concave portion provided on the second spherical surface is configured to be larger than the vehicle vertical direction width of the concave portion provided on the base side sliding surface. The door mirror mounting structure according to any one of claims 1 to 4 . 6. The concave portion provided on the retainer side sliding surface and the concave portion provided on the base side sliding surface are alternately provided in the circumferential direction. The door mirror mounting structure according to claim 1.

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