JP2015182475A - Vehicular door mirror - Google Patents

Abstract

PROBLEM TO BE SOLVED: To sufficiently reduce frictional resistance between a rotary member and a unit base over a long period in a mirror surface angle adjustment unit of a vehicular door mirror.SOLUTION: Rotation force of a motor 51 for lateral adjustment is transmitted to a rod A5 via a worm A1 and a rotary cylinder A2, and the rotation force is converted into longitudinal direction force and is transmitted to a mirror 2. The rotary cylinder A2 is brought into sliding contact with a rotary cylinder support recess A3 formed in a casing 50 of a mirror surface angle adjustment unit 5 and is rotatably supported. A peripheral surface groove section A32a for storing lubricant R and a bottom surface groove section A33a continuous to the peripheral surface groove section A32a are formed in a sliding contact inner peripheral surface A32 and a sliding contact bottom surface A33 of the rotary cylinder support recess A3.

Description

  The present invention relates to a vehicle door mirror attached to a door disposed on a side portion of a vehicle.

  2. Description of the Related Art Conventionally, a vehicle door mirror that includes a mirror, a mirror holder for holding the mirror, and a mirror surface angle adjustment unit for adjusting the angle of the mirror is known.

  In the mirror surface angle adjusting unit of Patent Document 1, a rod coupled to a mirror holder can rotate around the axis of a male screw portion (screw feed portion) provided in a housing (unit base), and this rod is driven to rotate by a motor. As a result, the rod reciprocates in the tilting direction of the mirror along the male screw portion, thereby tilting the mirror. A worm is provided on the output shaft of the motor, and a worm wheel (rotating member) meshing with the worm is slidably contacted with a gear holding portion formed in the housing of the mirror surface angle adjusting unit and is rotatably supported. The rod is housed in an integrally rotating manner with respect to the worm wheel inside the worm wheel in the radial direction, and the rotational force of the motor is transmitted to the rod via the worm and the worm wheel.

  In the mirror surface angle adjustment unit of Patent Document 2, a rod coupled to a mirror holder can be rotated along an inner screw (screw feed portion) of a guide cylinder provided in a housing (unit base). By being rotationally driven, the rod reciprocates in the tilting direction of the mirror along the inner screw, thereby tilting the mirror. A worm is provided on the output shaft of the motor, and a helical gear (rotating member) meshing with the worm is rotatably supported by the guide tube. In the helical gear, the distal end portion of the outer cylinder and the distal end portion of the inner cylinder are connected via a folded portion extending in the radial direction of the helical gear, and an outer screw that meshes with the worm is provided on the outer peripheral surface of the outer cylinder. The base end side surface (rotating member side second sliding contact surface) of the helical gear turn-up portion and the inner peripheral surface (rotating member side first sliding contact surface) of the outer cylinder are the distal end surface (base side second sliding surface) of the guide cylinder. The helical gear is rotatably supported by the guide cylinder by being in sliding contact with the contact surface) and the outer peripheral surface (base side first sliding contact surface). The rod is housed in the radial inner side of the helical gear so as to rotate integrally with the helical gear, and the rotational force of the motor is transmitted to the rod via the worm and the helical gear. The tip of the guide tube is thin, and a step is formed on the outer peripheral surface near the tip of the guide tube. Lubricant is accommodated in the stepped portion so that frictional resistance generated between the helical gear and the guide tube is reduced when the helical gear rotates.

Japanese Patent No. 4579252 Patent No. 4026309

  In the mirror angle adjustment unit shown in Patent Document 1, the worm wheel and the gear holding portion are in sliding contact with each other, and the gap between the worm wheel and the gear holding portion is small, so that a sufficient amount of lubricant is supplied to the gap. It is difficult. Therefore, when the mirror surface angle adjusting unit is repeatedly used, the amount of lubricant between the worm wheel and the gear holding portion may be reduced, and the frictional resistance between the worm wheel and the gear holding portion may be increased. In order to rotate the worm wheel against this frictional resistance, a motor that generates a large torque is required, which causes a problem that the manufacturing cost increases.

  Further, in the mirror surface angle adjustment unit shown in Patent Document 2, since the stepped portion that accommodates the lubricant is formed only on the outer peripheral surface of the guide cylinder, the proximal end surface of the distal end surface of the guide cylinder and the folded portion of the helical gear The gap between them is small and it is difficult to supply a sufficient amount of lubricant. Therefore, similarly to the above, there is a problem that the amount of lubricant between the helical gear and the guide cylinder is reduced, and the frictional resistance may be increased.

  The present invention has been made in view of such a point, and an object thereof is to make it possible to sufficiently reduce the frictional resistance between the rotating member and the unit base over a long period of time.

  In order to achieve the above object, in the present invention, a sufficient amount of lubricant is supplied to both the sliding contact surface extending in the circumferential direction of the rotating member and the sliding contact surface extending in the radial direction of the rotating member. I was able to.

The first invention is
Mirror,
A mirror holder to which the mirror is mounted;
In a vehicle door mirror comprising a mirror surface angle adjustment unit for adjusting the angle of the mirror,
The specular angle adjustment unit is
A tilt mechanism coupled to the mirror holder and tilting the mirror;
A motor for driving the tilt mechanism;
A unit base to which the motor is attached,
The tilt mechanism includes a screw feed portion that converts a rotational force input by the motor into a force in the tilt direction of the mirror, and a rotating member that transmits the rotational force of the motor to the screw feed portion,
The rotating member includes a supported portion that is slidably contacted with the unit base and supported rotatably.
The unit base includes a base-side first slidable contact surface that contacts a rotating member-side first slidable contact surface that extends in a circumferential direction of a rotation center line of the rotating member in the supported portion, and a rotation center in the supported portion. A base-side second sliding contact surface with which the rotating member-side second sliding contact surface extending in the radial direction of the wire is slidably contacted,
At least one of the rotating member side first slidable contact surface and the base side first slidable contact surface is formed with a first groove for accommodating a lubricant,
At least one of the rotating member side second slidable contact surface and the base side second slidable contact surface has a second groove portion for containing a lubricant formed so as to be continuous with the first groove portion. Features.

  According to this configuration, for example, when the lubricant is accommodated in the first groove portion and the rotating member is rotatably supported by the unit base, the first groove portion is connected to the second groove portion, so that the lubrication accommodated in the first groove portion is achieved. The agent can also move to the second groove. When the rotary member is rotationally driven in a state where the lubricant is accommodated in the first groove portion and the second groove portion, the lubricant accommodated in the first groove portion and the second groove portion is changed to the rotary member side first sliding contact surface and the base side. Supplied between the first sliding contact surface and between the rotating member side second sliding contact surface and the base side second sliding contact surface, the rotating member side first sliding contact surface and the rotating member side second sliding contact surface In both cases, the frictional resistance between the rotating member and the unit base is reduced. Even if this mirror surface angle adjusting unit is used repeatedly, the lubricant is accommodated in both the first groove and the second groove, so that a sufficient amount of lubricant is kept on the rotating member side first for a long period of time. Supplied to both the sliding surface and the rotating member side second sliding surface, the frictional resistance between the rotating member and the unit base is reduced.

  Even when the lubricant is first stored in the second groove instead of the first groove, the lubricant stored in the second groove can also move to the first groove. The frictional resistance between the rotating member and the unit base is reduced over a long period of time on both the contact surface and the rotating member side second sliding contact surface.

According to a second invention, in the first invention,
The outer peripheral surface of the rotating member is provided with a driven gear portion that meshes with a driving gear portion that rotates integrally with the output shaft of the motor,
The first groove portion is formed on the base-side first sliding contact surface and is open toward the driven gear portion.

  According to this configuration, when the rotating member is slidably supported on the unit base and supported in a state in which the lubricant is accommodated in the first groove portion, the lubricant accommodated in the first groove portion is driven by the driven gear portion in the first groove portion. It is possible to make it leak out toward the part open | released toward and to make it adhere also to the surface of a driven gear part. And since this lubricant reduces the frictional resistance of the surface of a driven gear part, the rotational force of a motor is efficiently transmitted to a rotating member.

According to a third invention, in the first or second invention,
The drive gear part is a worm,
The rotating member includes a worm wheel that meshes with the worm.

  According to this configuration, even when the worm wheel is rotationally driven by the motor via the worm and a thrust force is applied to the rotating member, a sufficient amount of the lubricant is accommodated in the second groove portion. Thus, the frictional resistance between the rotating member and the unit base is reduced.

A fourth invention is any one of the first to third inventions,
The second groove extends in the radial direction of the rotation center line of the rotating member,
An end portion of the second groove portion opposite to the first groove portion is closed.

  According to this configuration, the lubricant is difficult to leak out from the end portion of the second groove portion opposite to the first groove portion, so that the lubricant is accommodated in the first groove portion and the second groove portion for a longer period of time. Is preserved.

  According to the first invention, a sufficient amount of lubricant can be supplied to both the sliding contact surface extending in the circumferential direction of the rotating member and the sliding contact surface extending in the radial direction of the rotating member. Over a period, the frictional resistance between the rotating member and the unit base can be sufficiently reduced.

  According to the second invention, since the first groove portion is opened toward the driven gear portion, the lubricant can be adhered to the surface of the driven gear portion, and the rotational force of the motor can be efficiently rotated. Can be transmitted to the member.

  According to the third invention, even when the worm and the worm wheel are used, the frictional resistance between the rotating member and the unit base can be sufficiently reduced over a long period of time.

  According to the fourth invention, the end of the second groove opposite to the first groove is closed, so that leakage of the lubricant can be suppressed, and the rotating member and the unit base Can be sufficiently reduced.

It is a disassembled perspective view of the door mirror which concerns on embodiment. It is a front view of a mirror surface angle adjustment unit. It is a disassembled perspective view of a mirror surface angle adjustment unit. It is IV-IV sectional drawing of FIG. It is a top view of the front case of a mirror surface angle adjustment unit.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. It should be noted that the following description of the preferred embodiment is merely illustrative in nature, and is not intended to limit the present invention, its application, or its use.

  FIG. 1 is an exploded perspective view of a vehicle door mirror 1 according to an embodiment of the present invention. The door mirror 1 is used for the driver's rearward confirmation, and is fixed near the front end portion of the front door (not shown) of the automobile.

  In the following description, the right door mirror 1 will be described. However, the left door mirror has the same configuration as that of the right door mirror 1 except that it is bilaterally symmetric. .

  In the description of this embodiment, for convenience of explanation, the front side of the vehicle is simply referred to as “front”, the rear side of the vehicle is simply referred to as “rear”, and the left side in the vehicle width direction is simply referred to as “left”. The right side in the vehicle width direction is simply called “right”.

  The door mirror 1 includes a mirror 2 for rear confirmation, a door mirror base 3 attached to a front door (not shown), a mirror housing 4 in which the mirror 2 is disposed, and a mirror angle adjustment for adjusting the angle of the mirror 2. A unit 5 and a storage unit 6 for switching the mirror housing 4 between a storage state and a use state are provided.

  The mirror 2 is a plate-like member that is long in the left-right direction. Note that an anti-glare liquid crystal (not shown) or a heater (not shown) for heating the mirror 2 may be attached to the mirror 2.

  The door mirror base 3 includes a housing support plate portion 31 that extends to the right side, and a vertical plate portion 32 that extends in the vertical direction along the front end portion of a sash (not shown) of the front door (not shown). Yes. The vertical plate portion 32 is a portion that is fastened and fixed to the front end portion of the sash by a fastening member (not shown). A rotation shaft (not shown) of the storage unit 6 described later is attached to the housing support plate portion 31. A waterproof seal rubber 7 is disposed between the vertical plate portion 32 of the door mirror base 3 and the front end portion of the sash.

  The mirror housing 4 includes a housing main body 41, an upper housing cover 42, a lower housing cover 43, and a winker unit 44. The housing body 41, the upper housing cover 42, and the lower housing cover 43 are formed by molding a resin material.

  The housing body 41 has a shape that is long in the left-right direction corresponding to the shape of the mirror 2. On the rear side of the housing main body 41, a mirror housing recess 45 that is long in the left-right direction is formed so as to be recessed forward to house the mirror 2 and the mirror surface angle adjustment unit 5. The entire rear side of the mirror housing recess 45 is open. A plurality of fastening portions 451 to which fastening members (not shown) for fastening and fixing the mirror surface angle adjusting unit 5 to the housing body 41 are fastened and protruded rearward are provided on the bottom surface of the mirror housing recess 45.

  As shown in FIG. 1, the upper housing cover 42 is formed to bulge forward so as to cover the front portion of the housing body 41 from the front. The upper housing cover 42 is formed so as to extend from the right edge to the left edge of the housing main body 41 and from the upper edge to the vicinity of the lower edge. On the inner surface of the upper housing cover 42, an engaging claw portion 42a that engages with the housing main body 41 is provided so as to protrude rearward. The upper housing cover 42 is fixed to the housing body 41 by the engagement claw 42 a engaging the housing body 41. The winker unit 44 is attached in the vicinity of the central portion of the upper housing cover 42 in the vertical direction.

  The lower housing cover 43 is formed so as to cover the lower part of the housing body 41 from below. The lower housing cover 43 is also fixed to the housing body 41 in the same manner as the upper housing cover 42.

  The storage unit 6 is a so-called electric storage unit, and houses a rotating shaft (not shown) fixed to the door mirror base 3, a drive mechanism (not shown) made of a known motor or gear, and the like. In addition, a casing 60 fixed to the housing body 41 is provided. Since the mirror housing 4 is supported on the door mirror base 3 by the storage unit 6, the entire storage unit 6 is configured with high rigidity.

  When a drive mechanism (not shown) of the storage unit 6 is operated, the casing 60 and the drive mechanism are rotated around a rotation shaft (not shown), and the mirror housing 4 is switched between the storage state and the use state. . The retracted state is a state in which the right end of the mirror housing 4 approaches the window glass (not shown) of the front door (not shown) and the mirror surface of the mirror 2 extends in the front-rear direction. The right end of the mirror housing 4 is away from the window glass of the front door (not shown), and the mirror surface of the mirror 2 extends in the left-right direction.

  The back surface (surface opposite to the mirror surface) of the mirror 2 is bonded and fixed to the mirror holder 21 (shown in FIG. 4). The mirror 2 is held by the mirror housing 4 via a mirror holder 21 and a mirror surface angle adjustment unit 5.

  A center pivot receiving portion (not shown) that is pivotally coupled to a center pivot 503 of a mirror surface angle adjusting unit 5 described later is provided at a substantially central portion on the front surface of the mirror holder 21. A right and left pivot receiving portion 21a (shown in FIG. 4) that is pivotally coupled to an adjuster pivot A52 of the left and right tilt mechanism A, which will be described later, is provided at the right position of the center pivot receiving portion. In addition, an upper and lower pivot receiving portion (not shown) that is pivotally coupled to an adjuster pivot B52 of the vertical tilt mechanism B described later is provided at a lower position of the center pivot receiving portion. The mirror holder 21 is tiltably coupled to the mirror surface angle adjusting unit 5 by the above three pivot receiving portions. Since this pivot coupling structure is well known in the art, a detailed description thereof will be omitted.

  The mirror surface angle adjusting unit 5 adjusts the angle of the mirror 2 held by the mirror holder 21 by adjusting the angle of the mirror holder 21 in the left-right direction (around the vertical axis) and the up-down direction (around the horizontal axis extending in the left-right direction). This is for adjustment, and is fixed to the housing body 41 and incorporated in the door mirror 1. As shown in FIGS. 1 to 3, the mirror surface angle adjustment unit 5 includes a casing 50 (unit base) and a left-right tilt mechanism that is accommodated most in the casing 50 and tilts the mirror 2 left and right (around the vertical axis). A, most of which is accommodated in the casing 50, and a vertical tilt mechanism B that tilts the mirror 2 up and down (around the horizontal axis), a left and right tilt mechanism A, and a left and right tilt adjustment motor 51 that respectively drive the vertical tilt mechanism B and And a vertical adjustment motor 52. As shown in FIGS. 1 and 2, the mirror surface angle adjustment unit 5 is attached to the housing body 41 from the side of the housing body 41 that holds the mirror 2.

  As shown in FIG. 3, the casing 50 is configured by combining a rear case 501 and a front case 502 in the front-rear direction. As shown in FIG. 2, the casing 50 includes a wide portion 50A having a wide width and a narrow portion 50B having a narrow width. The casing 50 is attached to the housing 4 in a posture state in which the wide portion 50A is located on the lower right side and the narrow portion 50B is located on the upper left side.

  As shown in FIG. 3 and the like, a center pivot 503 serving as a tilt center of the mirror 2 is erected on the rear surface of the rear case 501. The center pivot 503 is fitted into the center pivot receiving portion (not shown) of the mirror holder 21 described above, so that the mirror holder 21 and the mirror surface angle adjusting unit 5 are pivotally coupled. Further, a right insertion hole 501b for inserting a rod A5 of a left / right tilt mechanism A, which will be described later, and a rod B5 of a vertical tilt mechanism B, are inserted on the right and lower sides of the center pivot 503 in the rear case 501, respectively. A lower insertion hole 501c is formed.

  The front case 502 is provided with a pair of left and right motor support ribs 504 that support the upper and lower portions of the left and right adjustment motor 51 on the upper right side in the narrow portion 50B. Also, a pair of upper and lower motor support ribs 505 that support the upper and lower portions of the vertical adjustment motor 52 are provided on the lower left side of the narrow portion 50B.

  As shown in FIG. 2, a fastening member that fastens and fixes the mirror surface angle adjustment unit 5 to the fastening portion 451 of the housing body 41 at the peripheral portions of the rear case 501 on the upper left side, the lower left side, and the upper right side. A fastening hole 501a for inserting a notch) is formed. Further, as shown in FIG. 5, a fastening member that fastens and fixes the mirror surface angle adjustment unit 5 to the fastening portion 451 of the housing body 41 at the peripheral edge portions on the left oblique upper side, the left oblique lower side, and the right oblique upper side of the front case 502. A fastening hole 502a for inserting (not shown) is formed. These fastening holes 501 a and 502 a are formed at positions corresponding to the fastening portions 451 when the mirror surface angle adjustment unit 5 is attached to the housing body 41.

  As shown in FIG. 3, the left / right adjustment motor 51 and the up / down adjustment motor 52 are such that the output shafts 511, 521 extend obliquely downward to the right and the left / right motor support ribs 504 of the front case 502 and the up / down motors. Each of the support ribs 505 is supported. The left / right adjustment motor 51 and the up / down adjustment motor 52 are accommodated substantially parallel to each other in the upper right and lower left portions of the narrow portion 50B of the casing 50, respectively. The left / right adjustment motor 51 and the up / down adjustment motor 52 can be independently operated by a switch (not shown) provided in a passenger compartment (not shown).

  The left / right tilt mechanism A is located in the wide portion 50A on the right side of the center pivot 503, and the angle of the mirror holder 21 can be adjusted left and right (around the vertical axis) by reciprocating a rod A5 described later in the front-rear direction. It can be done.

  The vertical tilt mechanism B is positioned in the wide portion 50A below the center pivot 503, and the angle of the mirror holder 21 is adjusted vertically (around the horizontal axis) by reciprocating a rod B5 described later in the front-rear direction. Can be done.

  FIG. 4 shows an enlarged view of the left-right tilt mechanism A. In the following description, the left / right tilt mechanism A will be described. However, the vertical tilt mechanism B is the same as the left / right tilt mechanism A except that the position with respect to the center pivot 503 is different from the left / right tilt mechanism A. Since it is a structure, the detailed description is abbreviate | omitted. In FIG. 4, the rear case 501 is indicated by a virtual line.

  As shown in FIGS. 3 and 4, the left / right tilt mechanism A includes a worm A1 (drive gear portion) attached to the output shaft 511 of the left / right adjustment motor 51 and a worm wheel A21 (driven gear portion) meshing with the worm A1. A rotating cylinder A2 (rotating member), a rotating cylinder support recess A3 that supports the rotating cylinder A2, and a screw feed part A4 that converts the rotational force of the rotating cylinder A2 into a force in the front-rear direction (the tilting direction of the mirror 2). And a rod A5 that reciprocates in the front-rear direction (the tilting direction of the mirror 2) by the screw feed portion A4.

  The rotary cylinder support recess A3 is integrally formed in the upper right portion of the wide portion 50A of the front case 502, and is formed as a circular recess that is open toward the rear side. As shown in FIG. 4, a small circular recess A31 that is recessed in a step shape from the bottom surface of the rotary cylinder support recess A3 is formed at the center of the bottom surface of the rotary cylinder support recess A3. The bottom surface of the small circular recess A31 is located in front of the bottom surface of the rotary tube support recess A3.

  A sliding contact inner peripheral surface A32 (base-side first sliding contact surface) is formed on the inner peripheral surface of the rotating tube supporting recess A3 so as to be in sliding contact with a sliding contact outer peripheral surface A221 of the rotating tube A2 described later. As shown in FIGS. 3 to 5, eight circumferential groove portions A <b> 32 a (first groove portions) for accommodating the lubricant R are formed on the sliding contact inner circumferential surface A <b> 32. The circumferential groove A32a extends in the axial direction of the rotary cylinder support recess A3 and is formed at substantially equal intervals. The rear side (mirror 2 side) in the circumferential groove A32a is open toward the worm wheel A21.

  In addition, a sliding contact bottom surface A33 (base-side second sliding contact surface) that is in sliding contact with a sliding contact end surface A222 of the rotating tube A2 described later is formed on the bottom surface of the rotating tube support recess A3. On the sliding contact bottom surface A33, eight bottom surface groove portions A33a (second groove portions) for accommodating the lubricant R are formed. The bottom groove portions A33a extend in the radial direction of the rotary tube support recess A3 and are formed at substantially equal intervals. As shown in FIG. 4, the end on the radially outer side of the bottom groove A33a is connected to the front end of the circumferential groove A32a. The length of the bottom groove A33a in the radial direction of the rotary cylinder support recess A3 is set to be approximately the same as the thickness of the supported cylinder part A22 of the rotary cylinder A2 to be described later.

  As shown in FIGS. 3 and 4, the rotary cylinder A2 includes a cylindrical supported cylinder part A22 (supported part) that is slidably contacted with the rotary cylinder support recess A3 and is rotatably supported. A22 is supported by the rotary cylinder support recess A3 in a posture in which the rotation axis direction is the front-rear direction. The worm wheel A21 is provided over the entire circumference on the outer peripheral surface in the vicinity of the central portion in the rotation axis direction of the supported cylindrical portion A22.

  A sliding contact outer peripheral surface A221 (sliding member side first sliding contact surface) that is in sliding contact with the sliding contact inner peripheral surface A32 of the rotating tube supporting recess A3 is provided on the outer peripheral surface on the front side (mirror housing 4 side) of the supported cylindrical portion A22. Is formed. As shown in FIG. 4, the front end surface of the supported cylinder portion A22 is a slidable contact end surface A222 (second slidable contact surface on the rotating member side) that is in slidable contact with the slidable contact bottom surface A33 of the rotary cylinder support recess A3. The slidable contact outer peripheral surface A221 and the slidable contact end surface A222 are slidably contacted with the slidable inner peripheral surface A32 and the slidable contact bottom surface A33 of the rotary tube support recess A3, so that the rotary tube A2 is rotatably supported by the rotary tube support recess A3. Yes. As shown in FIG. 4, since the length of the bottom surface groove portion A33a in the radial direction of the rotating tube supporting recess A3 is set to be approximately the same as the thickness of the supported tube portion A22 of the rotating tube A2, the diameter at the bottom surface groove portion A33a is set. The inner end in the direction (the end opposite to the end connected to the circumferential groove A32a) is a position corresponding to the inner peripheral surface of the supported cylinder A22 of the rotary cylinder A2, and the supported cylinder A22. It is blocked by

  As shown in FIGS. 3 and 4, four rotation engagement ribs A <b> 23 for rotating the rod A <b> 5 integrally with the rotation cylinder A <b> 2 are provided on the inner peripheral surface of the supported cylinder portion A <b> 22. The rotation engagement ribs A23 are substantially equidistant from each other in the circumferential direction so as to extend from the vicinity of the front end surface to the vicinity of the rear end surface on the inner peripheral surface of the rotation cylinder A2 in the rotation axis direction of the supported cylinder portion A22 of the rotation cylinder A2. Is provided.

  As shown in FIG. 3, the worm A1 is provided so as to mesh with the worm wheel A21 of the rotary cylinder A2 from the lower left side.

  As shown in FIGS. 3 and 4, the screw feeding portion A4 includes a male screw portion A41 extending in the rotation axis direction of the rotary cylinder A2, four screwing claws A42 engaged with the male screw portion A41 in a screwed state, It has.

  The male screw portion A41 is provided integrally with the front case 502 so as to protrude from the center of the bottom surface of the small circular recess A31 of the rotary cylinder support recess A3 to the rear side (mirror 2 side). The position of the front end portion in the protruding direction in the axial direction of the male screw portion A41 is in the vicinity of the coupling surface (shown in FIG. 4) between the front case 502 and the rear case 501.

  The screwing claw A42 is provided integrally with a support leg A51 of the rod A5 described later.

  The rod A5 includes a rod body A50 having a substantially cylindrical shape, a support leg portion A51 provided with a screwing claw portion A42 of the screw feeding portion A4, and an adjuster pivot accommodated in the left and right pivot receiving portion 21a of the mirror holder 21. A52.

  As shown in FIG. 4, the rod main body A50 is located on the radially outer side of the male screw portion A41. As will be described later, the rod A5 is in a posture state in which the axial direction of the rod main body A50 is the front-rear direction. A41 is supported so as to be rotatable and reciprocally movable in the front-rear direction. In the following description, for convenience of description, the rear side (upper side in FIG. 4) of the rod A5 is referred to as the distal end side, and the front side (lower side in FIG. 4) is referred to as the proximal end side.

  The axial length of the rod body A50 is approximately the same as the axial length of the rotary cylinder A2, and the inner diameter of the rod body A50 is approximately the same as the outer diameter of the male thread A41. The tip surface of the rod body A50 is closed.

  On the radially inner side of the rod main body A50, a stopper A501 that contacts the distal end surface in the protruding direction of the male screw portion A41 and restricts the movement range of the rod A5 toward the axial base end side is provided from the distal end portion of the rod main body A50 to the rod A5. It is provided so as to extend to the proximal end side along the central axis. In a state where the stopper A501 is in contact with the front end surface of the male screw portion A41 in the protruding direction, the screwing claw portion A42 and the support leg portion A51 do not contact the bottom surface of the small circular recess portion A31 of the rotary tube support concave portion A3. It is located closer to the tip end side in the axial direction than the bottom surface.

  As shown in FIGS. 3 and 4, four support legs A51 are provided so as to protrude from the base end portion of the rod main body A50 toward the base end side along the axial direction of the rod main body A50. The support leg portions A51 are substantially equally spaced from each other in the circumferential direction. A screwing claw portion A42 of the screw feeding portion A4 is provided at the protruding end portion (front end portion) of each support leg A51 so as to protrude inward in the radial direction of the rod A5. The four screwing claws A42 are engaged with the male screw portion A41 in a screwed state, whereby the rod A5 is supported by the male screw portion A41.

  The adjuster pivot A52 is a spherical member provided at the tip of the rod A5. As shown in FIG. 4, the adjuster pivot A <b> 52 is accommodated in the left and right pivot receiving portion 21 a of the mirror holder 21, so that the rod A <b> 5 can tilt with respect to the mirror holder 21.

  As shown in FIGS. 3 and 4, the rod A5 further includes two rotation engagement flanges A53 that engage with the rotation engagement ribs A23 of the rotation cylinder A2. As shown in FIG. 3, the rotation engagement flanges A53 are formed as arcuate flanges having a central angle of about 90 degrees so as to protrude radially outward of the rod A5 from the proximal end portion of the rod body A50. Is provided. As shown in FIG. 4, in a state where the rod A5 is assembled to the rotary cylinder A2, the rotary engagement flange A53 is positioned so as to be sandwiched between the plurality of rotary engagement ribs A23 of the rotary cylinder A2 from the circumferential direction of the rotary cylinder A2. Since the rotation cylinder A2 rotates because the contact with the side surface of the rotation engagement rib A23, the rotation engagement rib A23 of the rotation cylinder A2 rotates the rotation engagement flange A53, and the rod A5 is integrated with the rotation cylinder A2. It is designed to rotate.

  As shown in FIG. 3 and the like, the vertical tilt mechanism B also has a worm B1 (drive gear portion) attached to the output shaft 521 of the vertical adjustment motor 52 and a worm wheel B21 that meshes with the worm B1. A rotating cylinder B2 (rotating member) having a (driven gear section), a rotating cylinder support recess B3 that supports the rotating cylinder B2, and a rotational force of the rotating cylinder B2 is converted into a force in the front-rear direction (the tilting direction of the mirror 2). A screw feed part B4 and a rod B5 that reciprocates in the front-rear direction (the tilting direction of the mirror 2) by the screw feed part B4 are provided. The worm B1 of the vertical tilt mechanism B is provided so as to mesh with the worm wheel B21 of the rotating cylinder B2 from the upper right side.

  Similar to the left / right tilt mechanism A, the inner peripheral surface and the bottom surface of the rotating cylinder support recess B3 are respectively slidable inner peripheral surface B32 (base-side first slidable contact surface) and slidable contact bottom surface B33 (base-side second slidable contact). Surface) is formed. A circumferential groove B32a (first groove) and a bottom groove A33a (second groove) for accommodating the lubricant R are formed in the sliding inner circumferential surface B32 and the sliding bottom surface B33. The screw feed portion B4 includes a male screw portion B41 extending in the rotation axis direction of the rotary cylinder B2, and four screwing claw portions B42 engaged with the male screw portion B41 in a screwed state. An adjuster pivot B52 accommodated in an upper and lower pivot receiving portion (not shown) of the mirror holder 21 is provided at the tip of the rod B5.

  Next, the case where the rotating cylinder A2 of the left-right tilt mechanism A is assembled to the casing 50 will be described with respect to the mirror surface angle adjusting unit 5 configured as described above.

  First, when the lubricant R is accommodated in the bottom groove A33a of the rotary cylinder support recess A3 shown in FIGS. 3 to 5 and the rotary cylinder A2 is supported by the rotary cylinder support recess A3, the bottom groove A33a is connected to the circumferential groove A32a. Therefore, the lubricant R accommodated in the bottom groove A33a also moves to the circumferential groove A32a. Then, the lubricant R accommodated in the circumferential groove A32a leaks from the rear part of the circumferential groove A32a (the portion opened toward the worm wheel A21 of the rotary cylinder A2) toward the worm wheel A21, It also adheres to the surface of the wheel A21. At this time, the radially inner end of the bottom groove A33a (the end opposite to the end connected to the circumferential groove A32a) corresponds to the inner peripheral surface of the supported cylinder A22 of the rotary cylinder A2. Since it is blocked at the position, the lubricant R accommodated in the bottom groove portion A33a is difficult to leak from the bottom surface groove portion A33a to the inside in the radial direction of the supported cylinder portion A22.

  In this state, when the left / right adjustment motor 51 shown in FIG. 3 is rotated forward or backward, the rotational force of the left / right adjustment motor 51 is supplied to the worm wheel A21 of the rotary cylinder A2 via the worm A1 attached to the output shaft 511. Rotation cylinder A2 rotates around the axis of male screw portion A41. Then, the lubricant R accommodated in the circumferential groove A32a of the rotating cylinder support recess A3 shown in FIG. 4 is between the sliding contact outer peripheral surface A221 of the rotating cylinder A2 and the sliding contact inner peripheral surface A32 of the rotating cylinder support recess A3. And the lubricant R accommodated in the bottom groove A33a of the rotating cylinder support recess A3 is supplied between the sliding contact end surface A222 of the rotating cylinder A2 and the sliding contact bottom surface A33 of the rotating cylinder support recess A3. The frictional resistance between the rotating cylinder A2 and the rotating cylinder support recess A3 is reduced on both the sliding contact outer peripheral surface A221 and the sliding contact end face A222 of the rotating cylinder A2.

  At this time, the lubricant R leaking from the rear portion of the circumferential groove A32a is also attached to the surface of the worm wheel A21, and the lubricant R also reduces the frictional resistance of the surface of the worm wheel A21. Is efficiently transmitted to the rotary cylinder A2.

  Even if the mirror surface angle adjustment unit 5 assembled in this way is used repeatedly, the lubricant R is accommodated in both the circumferential groove A32a and the bottom groove A33a. An amount of the lubricant R is supplied to both the sliding contact outer peripheral surface A221 and the sliding contact end surface A222, and the frictional resistance between the rotary cylinder A2 and the rotary cylinder support recess A3 is reduced.

  In addition, the radially inner end (the end opposite to the circumferential groove A32a) of the bottom groove A33a is closed at a position corresponding to the inner circumferential surface of the supported cylinder A22 of the rotating cylinder A2. The lubricant R is difficult to leak out from the bottom groove A33a to the inside in the radial direction of the supported cylinder A22. Therefore, the state in which the lubricant R is accommodated in the circumferential groove A32a and the bottom groove A33a is maintained for a longer period of time, and the frictional resistance between the rotating cylinder A2 and the rotating cylinder support recess A3 can be reduced. it can.

  At this time, since the worm wheel A21 of the rotating cylinder A2 is rotationally driven by the left / right adjustment motor 51 via the worm A1, a thrust force acts on the rotating cylinder A2, and the sliding contact end surface A222 of the rotating cylinder A2 becomes the rotating cylinder. It is assumed that the sliding contact bottom surface A33 of the support recess A3 is strongly contacted, and the lubricant R between the sliding contact end surface A222 and the sliding contact bottom surface A33 is insufficient. However, in this embodiment, since the bottom surface groove portion A33a is formed on the sliding contact bottom surface A33, it is possible to maintain a state where a sufficient amount of the lubricant R is accommodated in the bottom surface groove portion A33a. The frictional resistance between the rotary cylinder A2 and the rotary cylinder support recess A3 can be reduced.

  Next, the case where the angle of the mirror 2 is adjusted in the door mirror 1 configured as described above will be described.

  When an occupant operates a switch (not shown) in the passenger compartment to rotate the left / right adjustment motor 51 shown in FIG. 3 in the normal direction or the reverse direction, the rotational force of the left / right adjustment motor 51 is a worm attached to the output shaft 511. It is transmitted to the worm wheel A21 of the rotary cylinder A2 via A1, and the rotary cylinder A2 rotates around the axis of the male screw portion A41.

  At this time, since the rotation engagement flange A53 of the rod A5 is engaged with the rotation engagement rib A23 of the rotation cylinder A2, when the rotation cylinder A2 rotates, the rod A5 and the male screw portion rotate integrally with the rotation cylinder A2. It rotates around the axis of A41. At this time, as shown in FIG. 4, the screwing claw A42 of the screw feed portion A4 provided on the support leg A51 of the rod A5 is engaged with the screw groove of the male screw A41 in a screwed state. The rod A5 reciprocates along the axial direction of the male screw portion A41 while rotating around the axis of the male screw portion A41.

  At this time, the rod A5 moves to the axial base end side, and the support leg portion A51 of the rod A5 or the screwing claw portion A42 of the screw feed portion A4 contacts the bottom surface of the small circular recess A31 of the rotary cylinder support recess A3. In this case, the support leg A51 or the screwing claw A42 may be damaged by the rotational force of the rod A5. However, since a stopper A501 that can contact the front end surface in the protruding direction of the male threaded portion A41 is provided inside the rod main body A50 in the radial direction, the stopper A501 has a stopper A501 on the front end surface in the protruding direction of the male threaded portion A41. It does not move to the axial direction proximal end side of the male screw portion A41 from the abutting position. Accordingly, the support leg A51 of the rod A5 or the screwing claw A42 of the screw feed part A4 does not contact the bottom surface of the small circular recess A31 of the rotary cylinder support recess A3, and the support leg A51 or the screwing claw A42. Can be avoided.

  Since the adjuster pivot A52 of the rod A5 is pivotally coupled to the left and right pivot receiving portion 21a of the mirror holder 21, the rod A5 reciprocates in the axial direction of the male screw portion A41, whereby the adjuster pivot A52 causes the mirror holder 21 to move back and forth. Is pushed back and forth. At this time, since the center pivot 503 (shown in FIG. 1 and the like) of the mirror surface angle adjusting unit 5 is pivotally coupled to a center pivot receiving portion (not shown) of the mirror holder 21, the mirror holder 21 is moved by the adjuster pivot A52. By pushing and pulling back and forth, the mirror holder 21 is angle-adjusted right and left (around the vertical axis) with respect to the mirror surface angle adjustment unit 5.

  In the vertical tilt mechanism B shown in FIG. 3 and the like, similarly to the horizontal tilt mechanism A, the occupant operates a switch (not shown) in the passenger compartment, and the worm B1 and the rotary cylinder B2 are driven by the rotational force of the vertical adjustment motor 52. By rotating the rod B5 via the rod B5, the rod B5 reciprocates along the axial direction of the male screw portion B41 while rotating around the axis of the male screw portion B41. An adjuster pivot B52 of the rod B5 and a center pivot 503 (shown in FIG. 1 and the like) of the mirror surface angle adjusting unit 5 are respectively provided on an upper and lower pivot receiving portion (not shown) and a center pivot receiving portion (not shown) of the mirror holder 21. Because of the pivot connection, the mirror holder 21 is pushed back and forth by the adjuster pivot B52 of the rod B5, so that the mirror holder 21 is angled up and down (around the horizontal axis) with respect to the mirror angle adjustment unit 5. . Since the up / down adjustment motor 52 can be operated independently of the left / right adjustment motor 51, the occupant can freely adjust the angle of the mirror holder 21 up / down / left / right with respect to the mirror surface angle adjustment unit 5.

  Since the mirror 2 is fixed to the mirror holder 21 and the mirror surface angle adjusting unit 5 is fixed to the housing body 41, when the mirror holder 21 tilts up, down, left and right with respect to the mirror surface angle adjusting unit 5, the mirror 2 Is tilted together with the mirror holder 21 to adjust the angle with respect to the mirror housing 4.

  As described above, according to the door mirror 1 according to this embodiment, both the sliding contact outer peripheral surface A221 extending in the circumferential direction of the rotary cylinder A2 and the sliding contact end face A222 extending in the radial direction of the rotary cylinder A2 are sufficient. Since a sufficient amount of the lubricant R can be supplied, the frictional resistance between the rotary cylinder A2 and the rotary cylinder support recess A3 can be sufficiently reduced over a long period of time.

  Further, since the circumferential groove A32a is opened toward the worm wheel A21, the lubricant R can be adhered to the surface of the worm wheel A21, and the rotational force of the left / right adjustment motor 51 is efficiently rotated. It can be transmitted to the cylinder A2.

  Even when the worm A1 and the worm wheel A21 are used, the frictional resistance between the rotary cylinder A2 and the rotary cylinder support recess A3 can be sufficiently reduced over a long period of time.

  Further, since the end of the bottom groove A33a opposite to the circumferential groove A32a is closed, the leakage of the lubricant R can be suppressed, and the rotary cylinder A2 and the rotary cylinder support recess A3 Can be sufficiently reduced.

(Other embodiments)
In the above-described embodiment, the screw feeding portion A4 includes the male screw portion A41 provided integrally with the front case 502 of the casing 50 (unit base), and the screwing engaged with the male screw portion A41 in a screwed state from the outside in the radial direction. The claw portion A42 is provided.For example, the screw feeding portion includes a female screw portion formed on the inner peripheral surface of the cylindrical member, and a screwing claw portion engaged with the female screw portion in a screwed state from the inside in the radial direction. You may make it comprise from. Such a female screw portion may be provided integrally with the unit base, or may be provided integrally with the inner peripheral surface of a rotary member such as the rotary cylinder A2.

  Moreover, in the above-mentioned embodiment, although both the 1st groove part and the 2nd groove part are formed in rotation cylinder support recessed part A3, one or both of the 1st groove part and the 2nd groove part are rotation of rotation cylinder A2 grade | etc., You may form in a member.

  In the above-described embodiment, when the rotating cylinder A2 of the left / right tilt mechanism A is assembled to the casing 50 of the mirror surface angle adjusting unit 5, the rotating cylinder A2 is supported by the rotating cylinder A2 while the lubricant R is accommodated in the bottom groove A33a. Although supported by the recess A3, the rotary cylinder A2 may be supported by the rotary cylinder support recess A3 in a state where the lubricant R is accommodated in the circumferential groove A32a. Even in this case, since the circumferential groove A32a is continuous with the bottom groove A33a, the lubricant R accommodated in the circumferential groove A32a also moves to the bottom groove A33a, and the same effect as the above-described embodiment is obtained. It is done.

  As described above, the vehicle door mirror according to the present invention can be used by being attached to, for example, a front door disposed on a side portion of an automobile.

1 Door mirror (vehicle door mirror)
2 Mirror 21 Mirror holder 21a Left and right pivot receiving part 3 Door mirror base 4 Mirror housing 5 Mirror surface angle adjustment unit 50 Casing (unit base)
503 Center pivot 51 Left / right adjustment motor 52 Up / down adjustment motor 6 Electric storage unit A Left / right tilt mechanism A1 Worm (drive gear)
A2 Rotating cylinder (Rotating member)
A21 Worm wheel (driven gear)
A22 Supported cylinder part (supported part)
A221 Sliding contact outer peripheral surface (rotating member side first sliding contact surface)
A222 Sliding contact end surface (rotating member side second sliding contact surface)
A3 Rotating cylinder support recess A32 Sliding contact inner peripheral surface (base side first sliding contact surface)
A32a circumferential groove (first groove)
A33 Sliding contact bottom (base side second sliding contact surface)
A33a Bottom groove (second groove)
A4 Screw feed section A41 Male thread section A42 Screwing claw section A5 Rod A52 Adjuster pivot B Vertical tilt mechanism B1 Worm (drive gear section)
B2 Rotating cylinder (Rotating member)
B21 Worm wheel (driven gear)
B3 Rotary cylinder support recess B32a Circumferential groove (first groove)
B33a Bottom groove (second groove)
B4 Screw feed section B5 Rod B52 Adjuster pivot R Lubricant

Claims (4)

Mirror,
A mirror holder to which the mirror is mounted;
In a vehicle door mirror comprising a mirror surface angle adjustment unit for adjusting the angle of the mirror,
The specular angle adjustment unit is
A tilt mechanism coupled to the mirror holder and tilting the mirror;
A motor for driving the tilt mechanism;
A unit base to which the motor is attached,
The tilt mechanism includes a screw feed portion that converts a rotational force input by the motor into a force in the tilt direction of the mirror, and a rotating member that transmits the rotational force of the motor to the screw feed portion,
The rotating member includes a supported portion that is slidably contacted with the unit base and supported rotatably.
The unit base includes a base-side first slidable contact surface that contacts a rotating member-side first slidable contact surface that extends in a circumferential direction of a rotation center line of the rotating member in the supported portion, and a rotation center in the supported portion. A base-side second sliding contact surface with which the rotating member-side second sliding contact surface extending in the radial direction of the wire is slidably contacted,
At least one of the rotating member side first slidable contact surface and the base side first slidable contact surface is formed with a first groove for accommodating a lubricant,
At least one of the rotating member side second slidable contact surface and the base side second slidable contact surface has a second groove portion for containing a lubricant formed so as to be continuous with the first groove portion. A featured vehicle door mirror. The vehicle door mirror according to claim 1,
The outer peripheral surface of the rotating member is provided with a driven gear portion that meshes with a driving gear portion that rotates integrally with the output shaft of the motor,
The vehicle door mirror according to claim 1, wherein the first groove portion is formed on the base-side first sliding contact surface and is opened toward the driven gear portion. The vehicle door mirror according to claim 1 or 2,
The drive gear part is a worm,
The vehicle door mirror according to claim 1, wherein the rotating member includes a worm wheel meshing with the worm. The vehicle door mirror according to any one of claims 1 to 3,
The second groove extends in the radial direction of the rotation center line of the rotating member,
The vehicle door mirror characterized in that an end portion of the second groove portion opposite to the first groove portion is closed.

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