JP3964627B2 - Vehicle door mirror device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a vehicle door mirror device capable of rotating between a storage position and a use position.
[0002]
[Prior art]
In a door mirror device for a vehicle, for example, an electrically retractable vehicle door mirror device, a door mirror stay is fixed on the vehicle body side so as to extend substantially in the width direction of the vehicle. Is supported rotatably. FIG. 6 shows a conventional electrically retractable vehicle door mirror device 100, which will be briefly described below.
[0003]
As shown in this figure, a door mirror stay 102 is fixed to the vehicle body side in a state of extending substantially in the vehicle width direction, and a stand 104 whose axial direction is substantially the vehicle vertical direction is fixed to the door mirror stay 102. Yes. An electric storage unit 106 is provided on the rotating shaft 104A of the stand 104 so as to be rotatable about an axis, and a door mirror main body 110 including a mirror 108 and the like is connected to and supported by the electric storage unit 106. .
[0004]
Therefore, when the drive motor in the electric storage unit 106 is driven, it tries to rotate the gear plate 112 (see FIG. 8) supported by the rotating shaft 104A via the gear mechanism, but the gear plate 112 is normally used as the rotating shaft. Since it is held in a non-rotating state with respect to 104A, as a result, the electric storage unit 106 itself receives a driving reaction force and rotates around the rotating shaft 104A. Since the door mirror main body 110 is connected to and supported by the electric storage unit 106, the door mirror main body 110 rotates between the storage position and the use position together with the electric storage unit 106.
[0005]
Here, the schematic configuration of the case 114 that constitutes the outline of the electric storage unit 106 described above will be described with reference to FIGS. 7 and 8.
[0006]
FIG. 7 shows a schematic plan view of a case 114 that constitutes the outline of the electric storage unit 106 in the vehicle door mirror device 100, and FIG. 8 shows a longitudinal sectional view of the case 114. As shown in FIG. As shown in these drawings, a cylindrical support shaft portion 116 is erected on the left side of the upper surface of the case 114 in the drawing, and an annular recess 118 is formed around the cylindrical support shaft portion 116. A rotating shaft 104A of the stand 104 is inserted into the supporting shaft portion 116, and the case 114 is rotatably supported by the rotating shaft 104A. Further, on the upper end side of the support shaft portion 116, a gear plate 112 that applies a driving reaction force to the electric storage unit 106 and thus the door mirror main body portion 110 is fixedly held.
[0007]
[Problems to be solved by the invention]
In the case of the electric storage unit 106 having the above configuration, the load of the electric storage unit 106 and the door mirror main body 110 must be supported by the support shaft portion 116 of the case 114. However, the strength of the support shaft portion 116 of the case 114 is not so high. Therefore, when an external force such as vehicle body vibration acts on the vehicle door mirror device 100, the door mirror main body 110 moves substantially in the vehicle front-rear direction around the support shaft portion 116 (near the base of the stand 104) as shown by an arrow in FIG. Vibrate. In order to suppress such vibration, the rigidity of the support shaft portion 116 may be increased. However, if the thickness of the support shaft portion 116 or the bottom portion 114A of the case 114 is reinforced to increase the thickness, sinking or warping may occur on the surface. And problems such as an increase in the molding cycle occur.
[0008]
An object of the present invention is to obtain a vehicle door mirror device that can effectively suppress vibration generated in the door mirror main body without increasing the plate thickness of the support shaft in consideration of the above facts.
[0009]
[Means for Solving the Problems]
A vehicle door mirror device according to a first aspect of the present invention includes a door mirror base portion that has a rotating shaft that extends substantially from the vehicle body side in the vehicle width direction and has an axial direction that is substantially the vehicle vertical direction in the assembled state. An electrically retractable storage unit that is pivotally supported by a rotation shaft of the door mirror base portion and is rotated between the storage position and the use position around the rotation shaft by applying a driving force, and a frame that constitutes a mounting seat surface A frame-like visor rim disposed on the rear surface side of the frame and fixed to the frame; and a device visor rim that is disposed on the front surface side of the frame and fitted onto the visor rim so as to be integrated with the visor rim. a visor cover for covering the storage unit with constituting, is configured to include a, a mirror for a vehicle rear view held in the frame while being positioned within the frame of the visor rim A door mirror main body part that rotates integrally with the storage unit by being connected to the storage unit, and is erected on a bottom wall part of a case that constitutes an outline of the storage unit A cylindrical support shaft portion that is inserted into and supported by the rotary shaft from the upper side in the axial direction, and is erected on the outer peripheral side of the support shaft portion in the bottom wall portion of the case to reinforce the support shaft portion And the case has an attachment point to the frame in the vicinity of the support shaft portion and within a range reinforced by the rib .
[0010]
A vehicle door mirror device according to a second aspect of the present invention is characterized in that, in the first aspect of the invention, the reinforcing ribs are formed radially around the support shaft portion.
[0011]
A vehicle door mirror device according to a third aspect of the present invention is the vehicle mirror according to the first or second aspect, wherein the case is disposed concentrically with the support shaft portion and an outer peripheral surface of the support shaft portion. And a wall portion having an inner peripheral surface facing the outer peripheral surface, and the outer peripheral surface of the support shaft portion and the inner peripheral surface of the wall portion are connected by the reinforcing rib. It is characterized by that.
[0012]
According to the first aspect of the present invention, the door mirror base portion has the rotating shaft whose axial direction is substantially the vehicle vertical direction in the assembled state, and when the driving force is applied to the storage unit, the storage is performed. The unit rotates between the storage position and the use position around the rotation axis. Since the door mirror main body is connected to the storage unit, when the storage unit rotates, the door mirror main body also rotates between the storage position and the use position.
[0013]
Here, on the bottom wall portion of the case that forms the outer shell of the storage unit described above, a cylindrical support shaft portion that is inserted and supported on the rotary shaft from the upper side in the axial direction is provided upright. The load of the storage unit and the door mirror main body acts on the part. However, in the present invention, since the reinforcing rib is provided on the outer peripheral side of the support shaft portion in the bottom wall portion of the case, the rigidity of the support shaft portion can be increased without increasing the plate thickness of the support shaft portion or the like. it can.
Furthermore, in the present invention, the case has an attachment point to the frame in the vicinity of the support shaft and within the range reinforced by the rib, so that the width direction dimension of the case can be shortened as compared with the conventional structure. Therefore, the storage unit can be downsized in the width direction.
[0014]
According to the second aspect of the present invention, since the reinforcing ribs are formed radially around the rotation axis, the cylindrical rotation axis can be reinforced uniformly or substantially equally.
[0015]
According to the third aspect of the present invention, the case has the support shaft portion and the wall portion, and the outer peripheral surface of the support shaft portion and the inner peripheral surface of the wall portion are connected by the rib. The rigidity of the shaft portion can be effectively increased.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an electrically retractable vehicle door mirror device 10 according to an embodiment of the present invention will be described with reference to FIGS.
[0017]
The schematic block diagram of the assembly | attachment state of the electrically retractable vehicle door mirror apparatus 10 which concerns on this embodiment is shown by FIG. As shown in this figure, an electrically retractable vehicular door mirror device 10 is fixed to a predetermined position on the side of a vehicle body and has a door mirror stay 12 as a “door mirror base portion” that extends substantially in the vehicle width direction. The electric storage unit 14 that is pivotally supported by a rotation shaft 52B, which will be described later, provided on the overhanging portion 12A of the door mirror stay 12 and rotates between the storage position and the use position, and the electric storage unit 14 rotate integrally. A door mirror main body portion 16.
[0018]
The door mirror main body 16 has a substantially rectangular flat frame 18 that is arranged vertically to form a mounting seat surface, and a visor rim 20 that is arranged on the rear surface side of the frame 18 and is fixed to the frame 18 by screwing or the like. A visor cover 22 that is disposed on the front surface side of the frame 18 and is fixed to the frame 18 with an engaging claw or the like while being fitted to the visor rim 20, and a frame 18 that is disposed on the rear side of the visor rim 20. And a mirror 24 which is held so that the mirror surface angle can be adjusted.
[0019]
The electric storage unit 14 is also fixed to the frame 18. Accordingly, from a different perspective, the door mirror main body 16 is connected to and integrated with the electric storage unit 14 via the frame 18. The electric storage unit 14 is pivotally supported on a rotation shaft 52B of a stand 52, which will be described later, so that when the electric storage unit 14 rotates about the rotation shaft 52B, the door mirror main body 16 also rotates together with the electric storage unit 14. It is the structure to do.
[0020]
FIG. 3 shows a front view of the electric storage unit 14, and FIG. 4 shows a plan view of the electric storage unit 14. Further, FIG. 1 shows a longitudinal sectional view (cross-sectional view taken along line 1-1 in FIG. 4) of the electric storage unit 14, and FIG. 2 shows a cross-sectional view of the electric storage unit 14 (2 in FIG. 3). -2 cross-sectional view).
[0021]
As shown in these drawings, the electric storage unit 14 includes a case 26 that forms an outer shell at the lower part of the unit and has an open upper end side, a gear cover 28 that forms an outer shell at the upper part of the unit and has an open lower end side, And a motor base 30 which is interposed between the case 26 and the gear cover 28 and partitions the unit internal space vertically. Regarding the plate thickness of these members, the case 26 is set to be the thickest and the gear cover 28 is set to be the thinnest in relation to the required strength. The gear cover 28 is detachably fitted to the case 26 by claw fitting.
[0022]
The case 26 has a total of three points, the upper and lower two points on the outer side and one lower end point on the inner side (the first attachment point 32 is set outside the case 26 so as to avoid the drive motor 38 described later, The third attachment point 36 is set within the widthwise dimension of the case 26) and is fixed (screwed) to the frame 18 disposed vertically in the door mirror main body 16.
[0023]
A drive motor 38 as a drive source is disposed on the outer side of the motor base 30 described above. A worm 42 is coaxially fixed to the output shaft 40 of the drive motor 38, and a helical gear 44 is engaged with the worm 42. The helical gear 44 is fixed to a worm shaft 46, and a worm 48 is coaxially fixed to the worm shaft 46.
[0024]
On the other hand, a cylindrical support shaft portion 50 is formed integrally with a portion of the case 26 closer to the inside of the bottom wall portion 26A. A stand 52 is inserted into the spindle 50 from below. The stand 52 includes a disc-shaped base portion 52A and a cylindrical rotating shaft 52B provided upright on the shaft center portion of the base portion 52A. The outer diameter of the base portion 52 </ b> A is larger than the outer diameter of the support shaft portion 50 of the case 26, and the base portion 52 </ b> A is disposed so as to protrude to the lower surface side of the bottom wall portion 26 </ b> A of the case 26. By fixing the base 52A to the overhanging portion 12A of the door mirror stay 12, the door mirror stay 12 has a rotation shaft 52B whose axial direction is substantially the vehicle vertical direction in the state after the electric storage unit 14 is assembled. ing.
[0025]
The upper end of the motor base 30 is locked to the upper end of the rotating shaft 52B of the stand 52, and the upper end of the gear cover 28 is locked to the upper end of the motor base 30. In simple terms, the upper end of the rotating shaft 52B of the stand 52, the upper end of the motor base 30, and the upper end of the gear cover 28 have a triple locking structure.
[0026]
In addition, the axially intermediate portion of the rotating shaft 52B of the stand 52 is cut out from two locations facing each other in the radial direction. Therefore, the axially intermediate portion of the rotating shaft 52B has a substantially elliptical shape (track shape) in plan view. It is made. In the following description, the notched portion is referred to as a “notched portion 54”.
[0027]
A substantially disc-shaped gear plate 56 is rotatably inserted into the rotation shaft 52B of the stand 52 having the above-described configuration. The aforementioned worm 48 meshes with the outer peripheral portion of the gear plate 56 so that the driving force of the driving motor 38 is transmitted. Further, on the upper surface side of the gear plate 56, an engaging portion having a trapezoidal cross section or the like is continuously formed in the circumferential direction. On the upper surface side of the gear plate 56, a clutch plate 58 formed in a substantially disc shape is disposed. Engaged portions such as a trapezoidal cross section that can engage with the engaging portions of the gear plate 56 are formed continuously in the circumferential direction on the lower surface of the clutch plate 58 and are engaged with the gear plate 56 in an uneven manner. .
[0028]
Further, a substantially ring-shaped push nut 60 is fixed near the upper end of the rotary shaft 52B of the stand 52 having the above-described configuration, and a biasing force is broadly defined between the push nut 60 and the upper surface of the clutch plate 58. A compression coil spring 62 that is grasped as a means is wound. Therefore, the compression coil spring 62 always presses and urges the clutch plate 58 toward the gear plate 56 side.
[0029]
Further, a shaft insertion hole 64 having a substantially elliptical shape (track shape) matching the plane cross-sectional shape of the rotation shaft 52B is formed in the shaft center portion of the clutch plate 58. The shaft insertion hole 64 has a notch of the rotation shaft 52B. Since the part 54 corresponds, the clutch plate 58 is not allowed to rotate with respect to the rotation shaft 52B.
[0030]
The electric storage unit is rotated between the lower surface of the gear plate 56 and the upper end portion of the support shaft portion 50 of the case 26 and between the lower end portion of the support shaft portion 50 and the upper surface of the base portion 52A of the stand 52. A slip washer 66 is interposed for reducing the frictional resistance at the time.
[0031]
Here, as shown in FIGS. 1 and 2, an annular recess 68 as a “wall portion” is further formed on the outer peripheral side of the cylindrical support shaft portion 50 formed in the case 26. The outer peripheral surface 50 </ b> A of the support shaft portion 50 and the inner peripheral surface 68 </ b> A of the recessed portion 68 are arranged to face each other, and a plurality of ribs 70 are formed radially from the outer peripheral surface 50 </ b> A of the support shaft portion 50. These ribs 70 have inner ends connected to the outer peripheral surface 50A of the support shaft portion 50, outer ends connected to the inner peripheral surface 68A of the recess 68, and lower ends connected to the bottom surface 68B of the recess 68. Yes.
[0032]
Next, the operation and effect of this embodiment will be described.
[0033]
First, the operation of the electrically retractable vehicle door mirror device 10 will be outlined by taking the case of storage as an example.
[0034]
When the drive motor 38 is driven, the output shaft 40 rotates about its axis. For this reason, the worm 42 fixed to the output shaft 40 rotates at the same speed, and the helical gear 44 is decelerated and rotated. When the helical gear 44 rotates, the worm shaft 46 to which the helical gear 44 is fixed rotates around its axis, so that the worm 48 fixed to the worm shaft 46 rotates at the same speed. In this way, the driving force of the drive motor 38 is transmitted to the gear plate 56 meshing with the worm 48, and the clutch plate 58 is frictionally engaged with the gear plate 56 by the urging force of the compression coil spring 62. For this reason, the rotation of the gear plate 56 is blocked by the clutch plate 58, whereby the reaction force of the driving force acting on the gear plate 56 acts on the electric storage unit 14, and the entire electric storage unit 14 is stand by the case 26. 52, the door mirror main body 16 is stored.
[0035]
When the door mirror main body 16 receives an external force and an external force of a predetermined value or more acts on the case 26, the friction engagement state between the gear plate 56 and the clutch plate 58 is released, and the rotation of the gear plate 56 relative to the clutch plate 58 is released. Permissible. For this reason, the gear plate 56 rotates together with the case 26, and the gear plate 56 is prevented from being damaged.
[0036]
Here, a cylindrical support shaft portion 50 that is pivotally supported by the rotation shaft 52B of the stand 52 is formed in the case 26 that constitutes the outline of the electric storage unit 14 described above. The load of the unit 14 and the door mirror main-body part 16 acts. However, in this embodiment, since the reinforcing ribs 70 are provided radially on the outer peripheral side of the support shaft portion 50, the rigidity of the support shaft portion 50 can be increased without increasing the thickness of the support shaft portion 50 and the like. It can be raised sufficiently. Therefore, according to the present embodiment, it is possible to effectively suppress and further prevent the door mirror main body portion 16 from vibrating substantially in the vehicle front-rear direction around the support shaft portion 50 due to vehicle body vibration or the like. Moreover, according to the present embodiment, there is no need to increase the plate thickness of the support shaft portion 50 and the bottom portion of the concave portion 68 of the case 26, so that the surface of the case 26 may be sinked or warped, or the case 26 may be manufactured. There is no problem such as an increase in the molding cycle.
[0037]
Moreover, according to this embodiment, since the rib 70 was formed radially centering on the cylindrical spindle part 50, the rib 70 can be reinforced uniformly or substantially equally. For this reason, according to this embodiment, there exists an advantage that the stress concentration resulting from the nonuniformity of a reinforcement degree does not arise easily.
[0038]
Furthermore, according to this embodiment, the rib 70 extends radially outward from the outer peripheral surface 50A of the support shaft portion 50 and is connected to the bottom surface 68B of the recess 68, but also with the outer peripheral surface 50A of the support shaft portion 50. Since it is provided so as to connect the inner peripheral surface 68 </ b> A of the recess 68, the rigidity of the support shaft portion 50 can be effectively increased. As a result, according to the present embodiment, the load acting on the support shaft portion 50 can be smoothly transmitted to the bottom wall portion 26 </ b> A of the case 26 via the rib 70 and supported by the entire case 26.
[0039]
Further, according to the present embodiment, since the plurality of ribs 70 are provided radially around the support shaft portion 50 of the case 26 and the rigidity around the support shaft portion 50 is increased, the case 26 is fixed to the frame 18. The third attachment point 36 can be set within the width direction dimension of the case 26. In other words, in the present embodiment, the third attachment point 36 is set in the vicinity of the support shaft portion 50 and within the range reinforced by the rib 70. Incidentally, in the case of the conventional structure, as shown in FIGS. 6 and 8, the third attachment point 120 is set at a position protruding outward in the radial direction of the case 114. From the above, according to the present embodiment, the width direction dimension of the case 26 can be made shorter than the conventional case. Therefore, the electric storage unit 14 can be downsized in the width direction. As a result, the electric storage unit 14 can be applied to a small mirror.
[0040]
In the present embodiment, the reinforcing ribs 70 are formed radially around the support shaft portion 50. However, in the relationship with the present invention as set forth in claim 1, the ribs are not necessarily provided radially. For example, the ribs may be provided in a cross shape with the support shaft portion as the center, or only one pair may be provided.
[0041]
In this embodiment, the outer end of the reinforcing rib 70 is connected to the inner peripheral surface 68A of the recess 68. However, in the relationship with the present invention described in claims 1 and 2, the rib is not necessarily provided. It is not necessary to connect the outer end portion of the recess to the inner peripheral surface of the recess. Even in this case, a certain degree of reinforcing effect can be expected.
[0043]
【The invention's effect】
As described above, the vehicle door mirror device according to the first aspect of the present invention has a cylindrical shape erected on the bottom wall portion of the case of the electric storage unit on the rotary shaft of the door mirror base portion in the assembled state. Since the reinforcing rib is provided on the outer peripheral side of the support shaft portion in the bottom wall portion of the case, the rigidity of the support shaft portion can be increased. As a result, the support shaft portion It has the outstanding effect that the vibration which arises in a door mirror main-body part can be suppressed effectively, without making the plate | board thickness increase.
Further, in the vehicle door mirror device according to the first aspect of the present invention, the case has an attachment point to the frame in the vicinity of the support shaft and within the range reinforced by the rib. It has the outstanding effect that it can reduce in size.
[0044]
The vehicle door mirror device according to the second aspect of the present invention is the vehicle door mirror device according to the first aspect of the present invention, wherein the reinforcing ribs are formed radially around the support shaft portion, so that the cylindrical rotating shaft is equally or substantially equal. It can be reinforced, and as a result, it has an excellent effect that stress concentration caused by unevenness in the degree of reinforcement hardly occurs.
[0045]
A vehicle door mirror device according to a third aspect of the present invention is the vehicle door mirror device according to the first or second aspect, wherein the case is arranged on a support shaft portion and a concentric circle with the outer peripheral surface of the support shaft portion. A wall portion having an inner peripheral surface facing the outer peripheral surface, and the outer peripheral surface of the support shaft portion and the inner peripheral surface of the wall portion are connected by a reinforcing rib, so that the rigidity of the support shaft portion is As a result, the load acting on the support shaft portion can be smoothly transmitted and supported to the wall portion via the reinforcing rib.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view (a sectional view taken along line 1-1 of FIG. 4) of an electric storage unit applied to an electric storage type vehicle door mirror device according to the present embodiment.
FIG. 2 is a cross-sectional view (cross-sectional view taken along line 2-2 in FIG. 3) of the electric storage unit applied to the electric storage-type vehicle door mirror device according to the present embodiment.
FIG. 3 is a front view of an electric storage unit applied to the electric storage type vehicle door mirror device according to the present embodiment.
FIG. 4 is a plan view of an electric storage unit applied to the electric storage type vehicle door mirror device according to the present embodiment.
FIG. 5 is a front view schematically showing the overall configuration of the electrically retractable vehicle door mirror device according to the present embodiment.
FIG. 6 is a front view schematically showing an overall configuration of a conventional electrically retractable vehicle door mirror device.
FIG. 7 is a cross-sectional view corresponding to FIG. 2 showing a case disposed in a conventional electric storage unit.
8 is a longitudinal sectional view (a sectional view taken along line 8-8 in FIG. 7) of the case and the like shown in FIG.
FIG. 9 is a schematic side view for explaining problems of a conventional electrically retractable vehicle door mirror device.
[Explanation of symbols]
10. Electric retractable vehicle door mirror device 12 Door mirror stay (door mirror base)
14 Electric storage unit 16 Door mirror body
18 frames
20 visor rim
22 Visor cover 24 Mirror 26 Case 26A Bottom wall portion 36 Third attachment point 50 Support shaft portion 50A Outer peripheral surface 52B Rotating shaft 68 Recessed portion (wall portion)
68A inner surface 70 rib

Claims (3)

A door mirror base portion that has a rotation shaft that extends in the vehicle width direction from the vehicle body side and that has a substantially vehicle vertical direction as an axial direction in the assembled state;
An electric retractable storage unit that is pivotally supported on the rotation shaft of the door mirror base portion and rotates between the storage position and the use position around the rotation shaft by applying a driving force;
A frame constituting the mounting seat surface, a frame-like visor rim arranged on the rear surface side of the frame and fixed to the frame, and a visor arranged on the front side of the frame and fitted on the visor rim A visor cover that is integrated with the rim to form the outer shell of the apparatus and covers the storage unit, and a mirror for rearward viewing of the vehicle that is disposed in the frame of the visor rim and is held by the frame is stored. A door mirror main body that rotates integrally with the storage unit by being connected to the unit;
A vehicle door mirror device comprising:
A cylindrical support shaft portion that is erected on a bottom wall portion of a case that constitutes an outline of the storage unit, and that is inserted into and supported by the rotation shaft from above in the axial direction;
A reinforcing rib that is erected on the outer peripheral side of the support shaft portion in the bottom wall portion of the case and reinforces the support shaft portion;
Have
Further, the vehicle door mirror device is characterized in that the case has an attachment point to the frame in the vicinity of the support shaft portion and within a range reinforced by the rib . The reinforcing ribs are formed radially around the support shaft portion.
The vehicle door mirror device according to claim 1. The case includes the support shaft portion, and a wall portion having an inner peripheral surface disposed concentrically with the outer peripheral surface of the support shaft portion and facing the outer peripheral surface.
The outer peripheral surface of the support shaft portion and the inner peripheral surface of the wall portion are connected by the reinforcing rib,
The vehicle door mirror device according to claim 1, wherein the vehicle door mirror device is provided.

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