WO2020022515A1

WO2020022515A1 - Electrically actuated retraction unit for outside mirror device for vehicles, and outside mirror device for vehicles

Info

Publication number: WO2020022515A1
Application number: PCT/JP2019/029553
Authority: WO
Inventors: 坂田　郁夫
Original assignee: 市光工業株式会社
Priority date: 2018-07-26
Filing date: 2019-07-26
Publication date: 2020-01-30
Also published as: CN112437730B; JP2020015433A; JP7087776B2; CN112437730A

Abstract

This electrically actuated retraction unit for an outside mirror device for vehicles electrically rotates a mirror assembly relative to a vehicle body, and is provided with: a shaft affixed to the vehicle body through a base; a gear case rotatably mounted to the shaft and having the mirror assembly mounted thereto; a cover mounted to the gear case; and a motor and a rotational force transmission mechanism, which are accommodated in the gear case and the cover. The gear case has an upstanding wall open at the top and surrounding the motor and the rotational force transmission mechanism. The cover has a fitting wall which fits from the outside to the periphery of the upper part of the upstanding wall, and a cover wall which covers the opening of the upstanding wall. An upper narrow passage, a lower wide space, and a lower narrow passage are arranged circumferentially and vertically between the outer surface of the upstanding wall and the inner surface of the fitting wall. An upper wide space is provided circumferentially between the upper end surface of the upstanding wall and the cover wall. A water receiving groove is provided circumferentially in the upper end surface of the upstanding wall. The cover wall has thereon a draining lip formed circumferentially so as to face the water receiving groove.

Description

Electric storage unit for vehicle outside mirror device, vehicle outside mirror device

The present disclosure relates to an electric storage unit of a vehicle outside mirror device. The present disclosure also relates to a vehicle outside mirror device.

As an electric storage unit of a vehicle outside mirror device and a vehicle outside mirror device which can provide a waterproof effect without requiring a sealing material, a rubber packing, a waterproof tape, and the like, for example, there is one disclosed in Patent Document 1. .

The door mirror device of Patent Literature 1 has a base, a driving mechanism, and a cover, and forms a widened portion on an opposing wall which is a tip of a peripheral wall of the base, and a gap at this portion is provided below the widened portion. This is sufficiently larger than the gap at the fitting portion. As a result, in the door mirror device of Patent Document 1, when the liquid such as water that has passed through the gap of the fitting portion due to the capillary phenomenon reaches the widening portion, the gap of the widening portion becomes sufficiently larger than the gap of the fitting portion. In addition, the resistance against gravity based on the surface tension of the liquid is reduced, and it becomes difficult to pass through the gap of the widened portion due to the capillary phenomenon. Thereby, the door mirror device of Patent Literature 1 can improve the waterproofness of a drive mechanism mounted inside the base.

JP-A-2003-137031

However, in the door mirror device of Patent Literature 1, an abutment surface is formed inside the cover corresponding to the tip of the opposing wall of the base, and the abutment surface is formed when the cover is fitted to the peripheral wall of the base. Abuts on the tip of For this reason, in the door mirror device of Patent Literature 1, the liquid (water) remaining in the gap of the widening portion is vaporized by a rise in ambient temperature to become a gas (steam, evaporated water), and the gas is covered by a capillary phenomenon. May enter the inside of the base through a gap between the contact surface of the base and the front end of the opposing wall of the base.

Accordingly, an object of the present disclosure is to provide an electric storage unit of a vehicle outside mirror device and a vehicle outside mirror device that can prevent water from entering the electric storage unit.

According to one aspect of the present disclosure, an electric storage unit of a vehicle outside mirror device is fixed to a vehicle body via a base in an electric storage unit of a vehicle outside mirror device that electrically rotates a mirror assembly with respect to a vehicle body. A shaft, a gear case rotatably mounted on the shaft and to which the mirror assembly is mounted, a cover mounted on the gear case, a motor and a torque transmitting mechanism housed in the gear case and the cover. A gear case having an opening at the top, a standing wall surrounding the periphery of the motor and the torque transmitting mechanism, wherein the cover has a fitting wall fitted around the top of the standing wall from outside, and an opening in the standing wall. An upper narrow passage portion and a lower widening portion between an outer surface of the standing wall and an inner surface of the fitting wall. An intermediate portion and a lower narrow passage portion are provided in the circumferential direction and up and down, respectively, and an upper widening space portion is provided in a circumferential direction between an upper end surface of the standing wall and the covering wall, A water receiving groove is provided on the upper end surface of the standing wall in the circumferential direction, and a drain lip portion is provided on the covering wall in the circumferential direction and opposed to the water receiving groove.

According to the present disclosure, an electric storage unit of a vehicle outside mirror device and a vehicle outside mirror device that can prevent water from entering the electric storage unit can be obtained.

FIG. 1 is a plan view of a use state showing an electric storage unit of a vehicle outside mirror device and an embodiment of a vehicle outside mirror device according to the present disclosure. FIG. 2 is a front view showing the state of use (a view taken in the direction of the arrow II in FIG. 1 and viewed from the rear side E of the vehicle toward the front side F of the vehicle). FIG. 3 is a front view (a view corresponding to FIG. 2) showing the electric storage unit. FIG. 4 is a front view (a view corresponding to FIG. 2) showing a disassembled state of the shaft, the gear case, and the cover of the electric storage unit. FIG. 5 is a longitudinal sectional view (a sectional view taken along line VV in FIG. 1) showing the electric storage unit. FIG. 6 is a longitudinal sectional view (a sectional view taken along line VI-VI in FIG. 3) showing the electric storage unit. FIG. 7 is a partially enlarged perspective view showing a main part of the gear case. FIG. 8 is a partial cross-sectional view showing the vehicle outside mirror device (a cross-sectional view taken along line VIII-VIII in FIG. 2 and viewed from above the vehicle). FIG. 9 is a cross-sectional view of the electric storage unit (a cross-sectional view taken along line IX-IX in FIG. 3 and viewed from below the vehicle). FIG. 10 is a partially enlarged vertical cross-sectional view illustrating the operation of the waterproof structure of the electric storage unit. (A) is an explanatory partial enlarged longitudinal sectional view showing a waterproof structure. (B) is a partially enlarged longitudinal sectional view showing a state in which water passes through the lower narrow passage and enters the lower widened space. (C) is an explanatory partial enlarged longitudinal sectional view showing a state in which water remains in the lower widened space portion. (D) is an explanatory view showing a state in which water remaining in the lower widened space portion is vaporized by a rise in ambient temperature to become steam (evaporated water) and passes through the upper narrow passage portion. It is a part expansion longitudinal sectional view. (E) is an explanatory partial enlarged longitudinal sectional view showing a state in which water is discharged through the lower drainage channel to the outside in the lower widened space portion. FIG. 11 is a partially enlarged vertical cross-sectional view illustrating the operation of the waterproof structure of the electric storage unit. (A) is a partially enlarged longitudinal sectional view for explanation showing a state in which water that has become steam has been liquefied again at the drain lip and turned into water. (B) is a partially enlarged longitudinal sectional view for explanation showing a state in which the water liquefied again at the drain lip part becomes large to some extent and falls into the water receiving groove. (C) is an explanatory partial enlarged longitudinal sectional view showing a state in which water dropped into the water receiving groove passes through the upper drainage groove from the water receiving groove and is discharged to the lower widening space side. FIG. 12 is a partially enlarged longitudinal sectional view showing a state where the worm gear is held in a bearing. FIG. 13 is a partially enlarged longitudinal sectional view showing a clearance between the worm gear and the cover, and a positioning state of the cover with respect to the gear case. 13A is a partially enlarged longitudinal sectional view taken along line AA in FIG. FIG. 13B is a partially enlarged longitudinal sectional view taken along the line BB in FIG.

Hereinafter, each embodiment will be described in detail with reference to the accompanying drawings.

In this specification and the appended claims, the front, rear, top, bottom, left, and right refer to the electric storage unit of the vehicle outside mirror device according to the present disclosure, and the vehicle equipped with the vehicle outside mirror device. Before, after, up, down, left, right. In the drawings, which are schematic diagrams, main parts are illustrated, parts other than the main parts are omitted, and a part of hatching is omitted. In FIG. 8, the cross section of the electric storage unit is omitted. Further, in FIG. 9, illustration of the internal mechanism of the electric storage unit is omitted.

(Description of Configuration of Embodiment)
Hereinafter, configurations of the electric storage unit of the vehicle outside mirror device and the vehicle outside mirror device according to this embodiment will be described.

(Explanation of the electric retractable door mirror device 1)
In FIG. 1, reference numeral 1 denotes an outside mirror device for a vehicle in this embodiment, and in this example, it is an electric retractable door mirror device (electrically retractable door mirror). The electric retractable door mirror device 1 is mounted on each of left and right doors D (a right door is shown and a left door is not shown) of an automobile (vehicle). Hereinafter, the configuration of the electric retractable door mirror device 1 mounted on the right door D of the automobile will be described. Note that the configuration of the electric retractable door mirror device mounted on the left door of the automobile is the same as the configuration of the electric retractable door mirror device 1 of this embodiment, and a description thereof will be omitted.

1) The electrically retractable door mirror device 1 includes a base (mirror base) 2, an electric storage unit 3, and a mirror assembly 4, as shown in FIG. The base 2 is fixed to a door D as a vehicle body. The mirror assembly 4 is rotatably attached to the base 2 via the electric storage unit 3. That is, the mirror assembly 4 is rotatably attached to the door D via the electric storage unit 3 and the base 2.

(Description of mirror assembly 4)
As shown in FIG. 1, the mirror assembly 4 rotates about a rotation center line G with respect to the base 2. For example, between the use position A and the rear storage position B and between the use position A and the forward tilting position C, the rotation is performed backward (clockwise as viewed from above) or forward (counterclockwise as viewed from above). Is what you do. In FIG. 1, reference symbol E indicates the rear of the vehicle, and reference symbol F indicates the front of the vehicle.

1, 2 and 8, the mirror assembly 4 includes a mirror housing 40, a mounting bracket (not shown), a power unit (not shown), and a mirror (mirror unit) 41. . An opening is provided in a portion (rear portion) on the rear E side of the vehicle of the mirror housing 40. A mounting bracket is mounted in the mirror housing 40. The power unit is mounted on the mounting bracket. A mirror 41 is attached to the power unit so as to be tiltable up, down, left, and right. The mirror 41 is arranged at an opening of the mirror housing 40. A gap 42 is provided between the edge of the opening of the mirror housing 40 and the edge of the mirror 41.

(Description of electric storage unit 3)
The electric storage unit 3 electrically rotates the mirror assembly 4 with respect to the door D. As shown in FIGS. 1 to 6, the electric storage unit 3 includes a shaft 20, a gear case 5, a cover 6, a motor M, and a torque transmitting mechanism 7.

The shaft 20 is fixed to the door D via the base 2. The gear case 5 is rotatably attached to the shaft 20. The mirror assembly 4 is mounted on the gear case 5 via a mounting bracket. The cover 6 is attached to the gear case 5. The shaft 20 passes through the inside of the gear case 5 and the cover 6 (hereinafter, referred to as “the inside of the electric storage unit 3”). The motor M and the torque transmitting mechanism 7 are housed in the electric storage unit 3.

(Description of the rotational force transmission mechanism 7)
As shown in FIGS. 5 and 6, the torque transmitting mechanism 7 includes a speed reduction mechanism, a clutch mechanism, and a stopper member 70. The reduction mechanism includes a first worm gear (first worm) 71 as a first-stage gear, a helical gear (worm wheel) 72 as a second-stage gear that meshes with the first worm gear 71, and a third-stage gear. It has a second worm gear (second worm) 73 as a gear, and a clutch gear (worm wheel) 74 as a last stage gear that meshes with the second worm gear 73.

一端 One end (lower end) of the first worm gear 71 is rotatably supported by a bearing 55 described later of the gear case 5. The other end (upper end) of the first worm gear 71 is connected to the output shaft of the motor M. The helical gear 72 is fitted and fixed to a shaft 730 of the second worm gear 73. The shaft 730 of the second worm gear 73 is rotatably supported by a bearing 52 described later of the gear case 5. The helical gear 72 and the second worm gear 73 rotate integrally.

The clutch mechanism includes a clutch gear 74, a clutch holder 75, a spring 76, and a push nut 77. The stopper member 70 is interposed between the shaft 20 and the gear case 5.

(Description of motor M)
The outer shape of the motor M is made of metal and is close to a rigid body. As shown in FIG. 5, a board 78 is electrically connected to the motor M via a terminal. The board 78 is provided with a socket S. A connector 79 is electrically connected to the socket S. The board 78 and the socket S are attached to the cover 6. The connector 79 is detachable from the cover 6.

(Description of gear case 5)
Since the gear case 5 is a member that connects the shaft 20 attached to the door D and the mirror housing 40 of the mirror assembly 4, the gear case 5 needs to be made of a highly rigid material. As a highly rigid material, for example, PA (nylon) containing glass fiber is used. The gear case 5 has an upright wall 50 surrounding the motor M and the rotation force transmission mechanism 7 as shown in FIGS. The upper part 51 of the standing wall 50 is open.

As shown in FIGS. 5, 6, 12, and 13, a bearing 55 for bearing the lower end of the first worm gear 71 is provided at the bottom of the gear case 5. Further, two bearing portions 52 for bearing both ends of the shaft 730 of the second worm gear 73 are provided at the bottom of the gear case 5. The rotation center line H of the shaft 730 of the second worm gear 73 and the center line G (rotation center line G) of the shaft 20 are perpendicular to each other (orthogonal state). Further, at the bottom of the gear case 5, two positioning projections 53 as positioning portions of the cover 6 are provided close to the two bearings 52.

(Description of cover 6)
As shown in FIGS. 5 and 6, the cover 6 has a fitting wall 60 that fits around the upper part of the standing wall 50 from outside, and a covering wall 61 that covers the upper opening 51 of the standing wall 50. The cover 6 does not require any particular rigidity. Conversely, since the cover 6 is provided with

fitting pieces

81 and 810 of the fitting member 8 described later, the cover 6 is made of an elastic resin material.

As shown in FIGS. 12 and 13, both ends of the shaft 730 of the second worm gear 73 and two holding portions 62 for holding a clearance in the direction of the center line G of the shaft 20 are provided on the cover 6 with two bearings. It is provided to face the part 52. Further, the cover 6 is provided with two positioning contact surfaces 63 as positioning portions of the cover 6, opposed to the two positioning projections 53 and close to the two holding portions 62. . The positioning contact surface 63 of the cover 6 and the positioning projection 53 of the gear case 5 form a positioning portion that determines the position of the shaft 20 in the direction of the center line G with respect to the gear case 5 of the cover 6.

(Description of fitting member 8)
As shown in FIGS. 3 to 6, a fitting member 8 for mutually assembling the gear case 5 and the cover 6 is provided on the upright wall 50 of the gear case 5 and the fitting wall 60 of the cover 6. The fitting member 8 has a fitting projection 80 and

fitting pieces

81 and 810. The fitting protrusion 80 is provided below the lower narrow passage portion 90D described later in the gear case 5. The

fitting pieces

81 and 810 are provided in the cover 6 below the lower narrow passage 90D.

The

fitting pieces

81 and 810 are provided with

fitting openings

84 and 840 into which the fitting projections 80 are fitted. By fitting the fitting projections 80 into the

fitting openings

84 and 840, the fitting projections 80 and the

fitting pieces

81 and 810 are fitted to each other. In this example, the fitting piece portion is elastically deformed in the direction of the center line G (rotation center line G) of the shaft 20 and resiliently deformed and fitted to the fitting convex portion 80. And a general fitting piece 810 that fits together with the fitting projection 80 without elastic deformation in the direction of the center line G.

As shown in FIG. 4, the fitting projection 80 is fitted into the fitting opening 84 of the elastic deformation fitting piece 81, and the elastic deformation fitting piece 81 is elastically deformed in the direction of the center line G of the shaft 20. In this state, it is fitted to the fitting projection 80. Further, the fitting projection 80 is fitted into the fitting opening 840 of the general fitting piece 810, and the general fitting piece 810 is fitted to the fitting projection 80 as it is (not elastically deformed). Combine.

As described above, the cover 6 is assembled to the gear case 5 by fitting the fitting projection 80 of the fitting member 8 with the elastic deformation fitting piece 81 and the general fitting piece 810. As a result, it is possible to prevent water or dust from entering the electric storage unit 3 and to prevent the motor M and the gears 71 to 74 from rising.

(Description of waterproof structure between gear case 5 and cover 6)
As shown in FIGS. 5 to 7 and FIGS. 9 to 11, the outer surface of the upright wall 50 of the gear case 5 (in this example, the outer surface of the upper end above the fitting member 8) and the fitting wall 60 of the cover 6 are provided. Between the inner side surface (in this example, the inner side surface above the fitting member 8), an upper narrow passage portion 90U, a lower widening space portion 9D, and a lower narrow passage portion 90D. Direction and at the top and bottom, respectively. An upper widened space portion 9U is provided in the circumferential direction between the upper end surface of the standing wall 50 and the surface (the lower surface in this example) of the covering wall 61. A water receiving groove 91 is provided on the upper end surface of the standing wall 50 in the circumferential direction. A draining lip portion 92 is provided on the surface (the lower surface in this example) of the covering wall 61 in the circumferential direction and perpendicular to the water receiving groove 91.

The upper widened space 9U is provided by forming a gap 93 between the upper end surface of the standing wall 50 and the lower surface of the covering wall 61. The gap 93 is formed and maintained by a positioning projection 53 serving as a positioning section provided on the gear case 5 and the cover 6, and a positioning contact surface 63. As shown in FIG. 13, the positioning projection 53 serving as a positioning portion and the positioning contact surface 63 are provided in the electric storage unit 3 in which the rotational force transmission mechanism 7 is stored.

底 The bottom of the water receiving groove 91 is inclined upward from the outside (the outer surface of the upright wall 50 of the gear case 5) to the inner side (the inner surface of the upright wall 50 of the gear case 5). That is, the outer wall surface of the water receiving groove 91 is vertical, and the inner wall surface of the water receiving groove 91 is inclined from bottom to top from the outside to the inside. As a result, the water W in the water receiving groove 91 accumulates outside the water receiving groove 91 as shown in FIG. The vertical wall surface outside the water receiving groove 91 is located outside the vertical wall surface outside the draining lip portion 92 (on the fitting wall 60 side of the cover 6).

The lower widened space portion 9D is provided by forming a concave portion 94 in a portion between the upper narrow passage portion 90U and the lower narrow passage portion 90D on the outer surface of the upper end portion of the upright wall 50 of the gear case 5. ing. The width between the outer surface of the upright wall 50 of the gear case 5, that is, the bottom surface of the recess 94 and the inner surface of the fitting wall 60 of the cover 6 in the lower widened space 9 D is widened.

The upper narrow passage portion 90U and the lower narrow passage portion 90D form the convex portions 95 on the upper portion and the lower portion of the concave portion 94 on the outer surface of the upper end portion of the upright wall 50 of the gear case 5, respectively. It is provided by that. The outer surface of the upright wall 50 of the gear case 5, that is, the top surface of the convex portion 95 in the upper narrow passage portion 90 U and the lower narrow passage portion 90 D protrudes outside the outer surface of the upright wall 50 of the gear case 5. The top surface of the projection 95 and the inner surface of the fitting wall 60 of the cover 6 are in contact with each other, and the width therebetween is narrow.

複数 On the outer surface of the upright wall 50 of the gear case 5 in the upper narrow passage portion 90U, that is, on the top surface of the convex portion 95, a plurality of upper water entry speed reduction grooves 99U are provided in the circumferential direction and vertically. On the outer surface of the upright wall 50 of the gear case 5 in the lower narrow passage portion 90D, that is, on the top surface of the convex portion 95, a plurality of lower water entry speed reduction grooves 96D are provided in the circumferential direction and vertically.

The upper end of the upright wall 50 of the gear case 5 is provided with a plurality of upper drain grooves 97U for discharging the water W in the water receiving grooves 91 to the lower widened space 9D side. Note that the number of the upper drain groove 97U may be one.

As shown in FIG. 7, the upper drainage groove 97 U is a vertically alternated portion with a lower drainage groove 97 D described later, and the inside of the gear case 5 (in this example, the left side) and the outside (in this example, (Right side). The upper drain groove 97U is provided at a location other than the location facing the gap 42 between the edge of the opening of the mirror housing 40 of the mirror assembly 4 and the edge of the mirror 41. This can prevent the water W that has entered the mirror assembly 4 (the interior of the mirror housing 40 and the mirror 41) from the gap 42 from entering the electric storage unit 3 via the upper drain groove 97U.

The gear case 5 in the lower narrow passage portion 90D is provided with a lower drain groove 97D for discharging the water W in the lower widened space portion 9D to the outside (outside) of the electric storage unit 3. As shown in FIG. 9, the lower drain grooves 97 D are provided inside and outside the gear case 5 in the vehicle width direction (in the vicinity of the inside and outside in the vehicle width direction). The inside and outside of the gear case 5 in the vehicle width direction are locations other than the location facing the gap 42 between the edge of the opening of the mirror housing 40 of the mirror assembly 4 and the edge of the mirror 41. Thus, the lower drain groove 97 D is provided in a portion of the gear case 5 other than the portion facing the gap 42.

延長 An extended drain groove 98 is provided on the outer surface of the upright wall 50 of the gear case 5 at a position below the lower drain groove 97D in the front-rear direction. The extended drain grooves 98 are provided on the inside and outside in the vehicle width direction of the gear case 5 so that water (W) communicates from the rear E side of the vehicle to the front F side of the vehicle.

(Explanation of operation of embodiment)
The electric storage unit 3 and the electric storage type door mirror device 1 according to this embodiment are configured as described above, and the operation thereof will be described below.

(Explanation of electric storage)
First, as shown in FIG. 1, in a state where the mirror assembly 4 is located at the use position A (use state), a switch (not shown) in the interior of the automobile is operated to connect the connector 79, the socket S, and the board 78. The motor M is driven by supplying power to the motor M via the motor M. Then, the torque of the motor M is transmitted to the clutch gear 74 fixed to the shaft 20 via the output shaft, the first worm gear 71, the helical gear 72, and the second worm gear 73 of the reduction mechanism. At this time, since the clutch gear 74 and the clutch holder 75 cannot rotate with respect to the shaft 20, the second worm gear 73 of the speed reduction mechanism causes the clutch gear 74 to be fixed by the rotational force transmitted from the motor M. And rotates around the center line G (rotation center line G) of the shaft 20. By this rotation, the mirror assembly 4 incorporating the electric storage unit 3 is rotated clockwise as viewed from above from the use position A to the rear storage position B around the center line G of the shaft 20, as shown in FIG. I do.

(Explanation of electric return)
Next, as shown in FIG. 1, in a state where the mirror assembly 4 is located at the rear storage position B (retracted state), a switch (not shown) in a vehicle compartment is operated to drive the motor M. Then, the rotational force of the motor M is transmitted to the clutch gear 74 in a non-rotatable state via the speed reduction mechanism. As a result, the mirror assembly 4 incorporating the electric storage unit 3 rotates counterclockwise as viewed from above from the rear storage position B to the use position A around the center line G of the shaft 20, as shown in FIG. I do.

(Explanation of buffer rotation)
As shown in FIG. 1, the mirror assembly 4 located at the use position A is a clockwise or counterclockwise force when viewed from above, and is greater than the electric rotational force (manual force, something (Force applied to the mirror assembly 4). Then, the gear case 5 attached to the mirror assembly 4 tends to rotate clockwise or counterclockwise when viewed from above. At this time, since the clutch holder 75 is non-rotatably fitted to the shaft 20, the clutch gear 74 pushes up the clutch holder 75, and the fitting state between the clutch gear 74 and the clutch holder 75 is released. At this time, the clutch holder 75 moves (ups) against the spring force of the spring 76.

As a result, the gear case 5 (including the cover 6, the motor M, and the torque transmitting mechanism 7) rotates clockwise as viewed from above. Thereby, as shown in FIG. 1, the mirror assembly 4 is counterclockwise viewed from above from the use position A to the rear storage position B as viewed from above, or from the use position A to the forward tilt position C as viewed from above. It rotates clockwise for cushioning.

(Explanation of return of buffer rotation)
Next, as shown in FIG. 1, a counterclockwise or clockwise force as viewed from above is applied to the mirror assembly 4 positioned in the rear storage position B or the forward tilt position C by buffering and rotating. Then, the mirror assembly 4 is rotated counterclockwise or clockwise as viewed from above from the rear storage position B or the forward tilt position C to the use position A. At this time, the clutch holder 75 in the disconnected state with the clutch gear 74 moves (downs) by the spring force of the spring 76, and the clutch gear 74 and the clutch holder 75 are connected.

(Explanation of the water blocking effect)
Hereinafter, the water blocking effect will be described with reference to FIGS. In FIG. 9 and FIG. 10, in order to clarify the infiltration path of water W and water vapor W, in the case of normal rain, the water W Since the water W flows downward from above, the water W does not enter the electric storage unit 3 disposed inside the mirror assembly 4. However, when the vehicle is washed, as shown in FIG. 8, there is a case where high-pressure water W is jetted from the rear E side of the vehicle to the front F side of the vehicle, that is, from the mirror 41 side. . In this case, the water W enters the inside of the mirror assembly 4 from the gap 42 between the edge of the opening of the mirror housing 40 of the mirror assembly 4 and the edge of the mirror 41, hits the

electric storage unit

3, and 3 may enter.

Here, most of the water W that has entered the inside of the mirror assembly 4 from the gap 42 does not enter the electric storage unit 3 as shown in FIG. From the rear E side of the vehicle to the front F side of the vehicle, that is, toward the front F side (rear side) of the mirror housing 40 through the lower extension drain groove 98 on the outside and the lower drain groove 97D. . On the other hand, the remaining part of the water W that has entered the inside of the mirror assembly 4 from the gap 42 passes through the lower narrow passage portion 90D as shown in FIG. 7 and FIG. It may penetrate into 9D. At this time, the inflow speed of the water W decreases (decreases) due to the plurality of lower water intrusion speed reduction grooves 96D.

As shown in FIG. 10C, the water W that has infiltrated into the lower widened space 9D further lowers (lowers) the infiltration speed in the lower widened space 9D in the large space, and the lower widened space 9D. It accumulates without rising upward from the portion 9D. The water W collected in the lower widened space 9D flows along the lower widened space 9D as shown in FIGS. 7 and 10 (E), and is provided inside and outside in the vehicle width direction. The water is discharged from the lower drainage groove 97D to the outside of the electric storage unit 3.

Here, as shown in FIG. 10D, there is a possibility that a part of the water W (water droplet) remains in the lower widened space 9D. The water W remaining in the lower widened space portion 9D becomes steam W due to an increase in air temperature, and passes through the upper narrow passage portion 90U, as shown by the dashed arrows and the thick dashed arrows in FIGS. There is a possibility of infiltration into the upper widened space 9U. At this time, the penetration speed of the water vapor W decreases (decreases) due to the plurality of upper water penetration speed reduction grooves 99U.

水 Water W (moisture) that has become the water vapor W and has entered the upper widened space 9U is again liquefied on the vertical wall outside the drain lip 92, as shown in FIG. When the water W liquefied again becomes large to some extent, it falls from the drain lip portion 92 to the water receiving groove 91 as shown in FIG. The water W that has fallen into the water receiving groove 91 flows along the water receiving groove 91 as shown in FIG. 11C, or travels along the water receiving groove 91, and from the upper drain groove 97U to the lower widening space 9D. Is discharged. As described above, the water W discharged to the lower widened space 9D flows along the lower widened space 9D as shown in FIG. 7 and FIG. It is discharged outside the storage unit 3.

Here, since the bottom of the water receiving groove 91 is inclined upward from the outside to the inside, the water W accumulates outside the water receiving groove 91 as shown in FIG. Therefore, the water W accumulated outside the water receiving groove 91 is easily discharged from the upper drain groove 97U to the lower widening space 9D as shown in FIG. 11C. On the other hand, the vertical wall surface outside the water receiving groove 91 is located outside the vertical wall surface outside the drain lip portion 92. For this reason, even if the remaining water W that cannot be completely discharged from the upper drainage groove 97U becomes steam again, the water W (moisture) is, as described above, as shown in FIG. It liquefies again on the outer vertical wall surface and falls into the water receiving groove 91. As a result, the water W (moisture) does not enter the electric storage unit 3 in which the motor M and the rotational force transmission mechanism 7 are stored from the upper widened space 9U.

(Description of effects of the embodiment)
The electric storage unit 3 and the electric storage type door mirror device 1 according to this embodiment have the above-described configuration and operation, and the effects thereof will be described below.

The electric retractable unit 3 and the electric retractable door mirror device 1 according to this embodiment include an upper narrow passage portion 90U between the outer surface of the upper end of the upright wall 50 of the gear case 5 and the inner surface of the fitting wall 60 of the cover 6. And a lower widened space portion 9D and a lower narrow passage portion 90D are provided in the circumferential direction and up and down, respectively. As a result, the electric storage unit 3 and the electric storage type door mirror device 1 according to this embodiment can achieve the same effects as the door mirror device of Patent Document 1 described above.

In particular, the electric retractable unit 3 and the electric retractable door mirror device 1 according to this embodiment are configured such that the upper widened space 9U extends circumferentially between the upper end surface of the upright wall 50 of the gear case 5 and the lower surface of the cover wall 61 of the cover 6. A water receiving groove 91 is provided on the upper end surface of the standing wall 50 in the circumferential direction, and a draining lip portion 92 is provided on the lower surface of the covering wall 61 in the circumferential direction and opposed to the water receiving groove 91. As a result, in the electric storage unit 3 and the electric storage type door mirror device 1 according to this embodiment, the water W remaining in the lower widened space 9D becomes steam W due to an increase in temperature, and passes through the upper narrow passage 90U. Even if it penetrates into the upper widened space portion 9U, it liquefies again on the vertical surface outside the drain lip portion 92, and the liquefied water W again falls from the drain lip portion 92 into the water receiving groove 91. Thereby, in the electric storage unit 3 and the electric storage type door mirror device 1 according to this embodiment, the water W remaining in the lower widened space portion 9D becomes steam W due to an increase in temperature, and passes through the upper narrow passage portion 90U. Thus, it is possible to prevent the intrusion into the electric storage unit 3.

Moreover, in the electric storage unit 3 and the electric storage type door mirror device 1 according to this embodiment, since the upper widened space portion 9U is provided between the upper end surface of the upright wall 50 and the lower surface of the covering wall 61, the upper narrow passage portion is provided. The water vapor W that has passed through 90U can be prevented from entering the electric storage unit 3 ahead of the upper widened space portion 9U due to the capillary phenomenon.

The electric storage unit 3 and the electric storage type door mirror device 1 according to this embodiment are provided with a plurality of lower water entry speed reduction grooves 96D provided on the outer surface of the standing wall 50 in the lower narrow passage portion 90D in the circumferential direction. It is. As a result, in the electric storage unit 3 and the electric storage type door mirror device 1 according to this embodiment, the inflow speed of the water W passing through the lower narrow passage portion 90D is reduced by the plurality of lower water inflow speed reduction grooves 96D. . Thereby, the electric storage unit 3 and the electric retractable door mirror device 1 according to this embodiment can delay the entry of the water W into the lower widened space 9D through the lower narrow passage 90D. Accordingly, it is possible to prevent the water W from entering the electric storage unit 3 by that amount.

The electric storage unit 3 and the electric storage type door mirror device 1 according to this embodiment are provided with a plurality of upper water entry speed reduction grooves 99U on the outer surface of the upright wall 50 in the upper narrow passage portion 90U in the circumferential direction. . As a result, the electric storage unit 3 and the electric retractable door mirror device 1 according to this embodiment allow the upper narrow passage portion 90U to move even if the water W in the lower widened space portion 9D becomes steam W due to an increase in temperature. The penetration speed of the passing water vapor W is reduced by the plurality of upper water penetration speed reduction grooves 99U. Thereby, the electric storage unit 3 and the electric storage type door mirror device 1 according to this embodiment can delay the entry of the water vapor W into the upper widening space 9U through the upper narrow passage 90U, For this reason, it is possible to prevent the water W from entering the electric storage unit 3.

電動 In the electric storage unit 3 and the electric storage type door mirror device 1 according to this embodiment, the bottom of the water receiving groove 91 is inclined upward from the outside to the inside. As a result, in the electric storage unit 3 and the electric retractable door mirror device 1 according to this embodiment, since the water W that has fallen from the drain lip portion 92 into the water receiving groove 91 easily accumulates outside the water receiving groove 91, the water receiving groove is used. It is possible to prevent the water W accumulated in the 91 from entering the electric storage unit 3 from the outside to the inside through the inside where the water W easily accumulates.

電動 In the electric storage unit 3 and the electric storage type door mirror device 1 according to this embodiment, the vertical wall surface outside the water receiving groove 91 is located outside the vertical wall surface outside the drain lip portion 92. As a result, the electric storage unit 3 and the electric retractable door mirror device 1 according to the present embodiment are configured such that even if the water W collected outside the water receiving groove 91 becomes steam again, the water W The liquid W is again liquefied on the vertical wall surface and falls into the water receiving groove 91, so that it is possible to prevent the water W accumulated outside the water receiving groove 91 from entering the electric storage unit 3 as steam W.

The electric storage unit 3 and the electric retractable door mirror device 1 according to this embodiment include an upper drain groove for discharging water W in the water receiving groove 91 to the lower widening space portion 9D side at the upper end of the upright wall 50 of the gear case 5. 97U is provided. As a result, the electric storage unit 3 and the electric retractable door mirror device 1 according to this embodiment can discharge the water W accumulated in the water receiving groove 91 to the lower widened space 9D through the upper drain groove 97U. Therefore, it is possible to prevent the water W from entering the electric storage unit 3 via the water receiving groove 91.

The electric storage unit 3 and the electric retractable door mirror device 1 according to this embodiment are configured such that the water W in the lower widened space 9D is supplied to the outer wall 50 of the lower widened space 9D on the upright wall 50 of the gear case 5 in the lower narrow passage 90D. Is provided with a lower drainage groove 97D for discharging water to the bottom. As a result, the electric storage unit 3 and the electric retractable door mirror device 1 according to this embodiment allow the water W accumulated in the lower widened space 9D to be discharged to the outside of the electric storage unit 3 via the lower drainage groove 97D. Therefore, it is possible to prevent the water W from entering the electric storage unit 3 via the lower widened space 9D.

In the electric storage unit 3 and the electric storage type door mirror device 1 according to this embodiment, the lower drain groove 97 D is located inside and outside the gear case 5 in the vehicle width direction and at the opening of the mirror housing 40 of the mirror assembly 4. It is provided at a location other than the location facing the gap 42 between the edge and the edge of the mirror 41. As a result, in the electric storage unit 3 and the electric retractable door mirror device 1 according to this embodiment, the water W that has entered the mirror assembly 4 from the gap 42 easily enters the lower widened space 9D via the lower drain groove 97D. Intrusion can be prevented.

In the electric storage unit 3 and the electric retractable door mirror device 1 according to this embodiment, the upper drain 97 U and the lower drain 97 D are provided at alternately upper and lower locations, so the upper drain 97 U and the lower drain 97 D. Becomes a maze. As a result, in the electric storage unit 3 and the electric retractable door mirror device 1 according to this embodiment, the water W that has entered the mirror assembly 4 from the gap 42 passes through the lower drainage groove 97D that is formed in a maze, and the lower widening space. It can be prevented from entering the portion 9D and entering the upper widened space portion 9U via the upper drain groove 97U.

The electric retractable unit 3 and the electric retractable door mirror device 1 according to the present embodiment are provided with an extended drain groove 98 provided in the outer surface of the upright wall 50 of the gear case 5 at a position below the lower drain groove 97D in the front-rear direction. is there. As a result, in the electric storage unit 3 and the electric storage type door mirror device 1 according to this embodiment, the water W that has entered the mirror assembly 4 from the gap 42 does not enter the electric storage unit 3 and the electric storage unit 3 Of the vehicle from the rear E side of the vehicle to the front F side of the vehicle, that is, the front F To the side (back side). Thereby, the electric storage unit 3 and the electric storage type door mirror device 1 according to this embodiment can prevent the water W from entering the electric storage unit 3.

The electric storage unit 3 and the electric storage type door mirror device 1 according to this embodiment include the gear case 5, the cover, and the fitting protrusion 80 of the fitting member 8, the elastic deformation fitting piece 81, and the general fitting piece 810. 6 is provided below the lower narrow passage portion 90D. As a result, the electric storage unit 3 and the electric retractable door mirror device 1 according to this embodiment provide the function of assembling the gear case 5 and the cover 6 by the fitting member 8 with the waterproof structure between the gear case 5 and the cover 6. It can function satisfactorily without affecting its function. The electric storage unit 3 and the electric retractable door mirror device 1 according to this embodiment have a waterproof function by a waterproof structure between the gear case 5 and the cover 6 and an assembling function of the fitting member 8 between the gear case 5 and the cover 6. Functioning without affecting the performance.

In the electric storage unit 3 and the electric storage type door mirror device 1 according to this embodiment, the cover 6 has an elastic deformation fitting piece 81 that elastically deforms in the direction of the center line G of the shaft 20. And a positioning projection 53 and a positioning contact surface 63 as positioning portions for determining the position of the shaft 20 in the direction of the center line G with respect to the gear case 5 of the cover 6. As a result, the electric storage unit 3 and the electric retractable door mirror device 1 according to this embodiment have the elastic action of the elastic deformation fitting piece 81 and the positioning action of the positioning portion (the positioning projection 53 and the positioning contact surface 63). And the cover 6 can be lowered to the positioning reference and stabilized.

In particular, the electric storage unit 3 and the electric retractable door mirror device 1 according to this embodiment include the positioning protrusion 53 serving as a positioning portion and the positioning contact surface 63, and the upper end surface of the upright wall 50 of the gear case 5 and the cover wall of the cover 6. A gap 93 can be formed and maintained between the lower surface of the first member 61 and the lower surface of the second member 61. As a result, in the electric storage unit 3 and the electric storage type door mirror device 1 according to this embodiment, since the gap 93 is formed and maintained, the waterproof action of the water receiving groove 91 and the drainage lip portion 92 of the upper widened space 9U is achieved. Can also be maintained.

(Description of examples other than the embodiment)
In the above embodiment, as shown in FIG. 10, the outer surface of the upper narrow passage portion 90U and the lower narrow passage portion 90D of the upright wall 50 of the gear case 5, that is, the top surface of the convex portion 95 is the other portion. Are projected outside the outer side surface of the. However, in the present disclosure, the outer surfaces of the upper narrow passage portion 90U and the lower narrow passage portion 90D of the upright wall 50 of the gear case 5 may be flush with the outer surfaces of other portions.

Further, in the above-described embodiment, the plurality of upper water entry speed lowering grooves 99U and the lower water entry speed lowering grooves 96D are provided in the upper narrow passage portion 90U and the lower wall 50D of the gear case 5 in the lower narrow passage portion 90D. Is provided on the outer surface of the projection, that is, on the top surface of the projection 95. However, in the present disclosure, the plurality of upper water entry speed lowering grooves 99U and lower water entry speed lowering grooves 96D are provided in the upper narrow passage portion 90U and the lower narrow passage portion 90D with the fitting wall 60 of the cover 6. May be provided on both the outer surface of the upright wall 50 of the gear case 5, that is, the top surface of the convex portion 95 and the inner surface of the fitting wall 60 of the cover 6. Is also good. Moreover, the number of the upper water entry speed reduction groove 99U and the number of the lower water entry speed reduction groove 96D may be one.

Note that the present invention is not limited by the above embodiment. In particular, the shapes and positions of the water receiving grooves 91 and the draining lip portions 92, and the numbers and positions of the upper drain grooves 97U and the lower drain grooves 97D are not limited to the above embodiments.

1 Electric retractable door mirror device (outside mirror device for vehicles)
2 Base 20 Shaft 3 Electric Storage Unit 4 Mirror Assembly 40 Mirror Housing 41 Mirror 42 Gap 5 Gear Case 50 Standing Wall 51 Upper Opening 52 Bearing Bearing 53 Positioning Convex 55 Bearing 6 Cover 60 Fitting Wall 61 Covering Wall 62 Holding Part 63 Positioning Contact surface 7 Rotational force transmission mechanism 70 Stopper member 71 First worm gear 72 Helical gear 73 Second worm gear 730 Shaft 74 Clutch gear 75 Clutch holder 76 Spring 77 Push nut 78 Substrate 79 Connector 8 Fitting member 80 Fitting projection 81 Elastic deformation Fitting piece 810

General fitting piece

84, 840 Fitting opening 9U Upper widened space 9D Lower widened space 90U Upper narrow passage 90D Lower narrow passage 91 Water receiving groove 92 Drip lip 93 Gap 94 recess 9 Protrusions 99U upper water penetration rate decreases groove 96D lower water penetration rate decreases groove 97U upper drain groove 97D under side drain grooves 98 extending drainage ditch A use position B behind the storage position C forward tilt position D door (vehicle body)
E Back of the vehicle F Forward of the vehicle G Center of rotation (center line of shaft 20)
H Center line of rotation of second worm gear 73 I Clearance M Motor S Socket W Water, steam

Claims

In an electric storage unit of a vehicle outside mirror device for electrically rotating a mirror assembly with respect to a vehicle body,
A shaft fixed to the vehicle body via a base,
A gear case rotatably attached to the shaft and to which the mirror assembly is attached;
A cover attached to the gear case,
A motor and a rotational force transmission mechanism housed in the gear case and the cover;
With
The gear case has an upright opening, an upright wall surrounding the motor and the rotational force transmission mechanism,
The cover has a fitting wall that fits around the upper part of the standing wall from the outside, and a covering wall that covers an opening of the standing wall,
Between the outer surface of the upright wall and the inner surface of the fitting wall, an upper narrow passage portion, a lower widening space portion, and a lower narrow passage portion are provided in the circumferential direction and up and down, respectively. And
Between the upper end surface of the standing wall and the covering wall, an upper widening space portion is provided in a circumferential direction,
A water receiving groove is provided in a circumferential direction on an upper end surface of the standing wall,
A draining lip is provided on the covering wall in a circumferential direction and opposed to the water receiving groove,
An electric storage unit for an outside mirror device for a vehicle, comprising:
On at least one of the outer side surface of the upright wall or the inner side surface of the fitting wall in the upper narrow passage portion, an upper water infiltration speed reduction groove is provided in a circumferential direction,
At least one of the outer surface of the upright wall and the inner surface of the fitting wall in the lower narrow passage portion is provided with a lower water infiltration speed reduction groove in a circumferential direction,
The electric storage unit of the outside mirror device for a vehicle according to claim 1, wherein:
The bottom of the water receiving groove is inclined at an upward slope from the outer surface side of the upright wall to the inner surface side of the upright wall,
The electric storage unit of the outside mirror device for a vehicle according to claim 1, wherein:
The wall surface on the outer surface side of the standing wall of the water receiving groove is located on the outer surface side of the standing wall with respect to the wall surface of the drainage lip portion on the fitting wall side,
The electric storage unit of the outside mirror device for a vehicle according to claim 1, wherein:
The standing wall is provided with at least one upper drain groove for discharging water in the water receiving groove toward the lower widened space portion side.
The electric storage unit of the outside mirror device for a vehicle according to claim 1, wherein:
The mirror assembly includes: a mirror housing having an opening at a rear side; and a mirror disposed at the opening of the mirror housing.
The upright wall in the lower narrow passage portion is provided with a lower drainage groove for discharging water in the lower widening space portion to the outside,
When the mirror assembly is located at the use position, the lower drain groove is located between the inside of the gear case in the vehicle width direction and the outside thereof, between the edge of the opening of the mirror housing and the edge of the mirror. Are provided at locations other than the location facing the gap,
The electric storage unit of the outside mirror device for a vehicle according to claim 1, wherein:
The standing wall is provided with at least one upper drain groove for discharging water in the water receiving groove toward the lower widened space portion side,
At least one of the upper drainage grooves and at least two of the lower drainage grooves are arranged alternately up and down;
The electric storage unit of the outside mirror device for a vehicle according to claim 6, wherein:
An extended drain is provided in the front-rear direction at a position below the lower drain on the outer surface of the standing wall,
The electric storage unit of the outside mirror device for a vehicle according to claim 6, wherein:
The gear case and the cover are assembled to each other by a fitting member,
The fitting member,
A fitting projection provided below the lower narrow passage portion of the gear case,
A fitting piece that is provided below the lower narrow passage portion of the cover and has a fitting opening in which the fitting protrusion fits, and the fitting piece mutually fits with the fitting protrusion; Department and
Has,
The fitting piece portion is elastically deformed in the center line direction of the shaft and is elastically deformed to fit with the fitting convex portion, or the fitting piece portion does not elastically deform in the center line direction of the shaft. Consisting of at least one of a fitting projection and a general fitting piece that fits with each other,
The electric storage unit of the outside mirror device for a vehicle according to claim 1, wherein:
The cover has at least the elastic deformation fitting piece,
The gear case and the cover are provided with positioning portions for determining the position of the cover in the center line direction with respect to the gear case, respectively.
The electric storage unit of the vehicle outside mirror device according to claim 9.
A base fixed to the vehicle body,
The electric storage unit according to claim 1,
A mirror assembly rotatably attached to the base via the electric storage unit;
Comprising,
An outside mirror device for a vehicle, comprising: