JPH11198728A - Stopper mechanism for electric retractable door mirror - Google Patents

Abstract

(57) [Summary] [Problem] To reduce the external dimensions. Reliable stopper action. SOLUTION: A stopper convex portion 226 and a stopper concave portion 206 are provided on a facing surface 225 of a gear case 22 and a facing surface 205 of a shaft holder 20. As a result, since the outer dimensions of the stopper are within the range of the facing surface 225 of the gear case 22 and the facing surface 205 of the shaft holder 20, the stopper protrusions 222, 20 are compared with the conventional stopper mechanism.
The outer diameter dimension of the shaft in the radial direction can be reduced by the thickness of 2. Stopper surfaces 227, 228, 207, and 208 are provided on the stopper protrusion 226 and the stopper recess 206 in the axis Z-Z direction of the shaft 21. As a result, the shaft 2
1 without increasing the outer dimensions in the radial direction.
7, 228, 207, and 208 can be increased, and the strength can be increased by increasing the thickness of the stopper convex portion 226 and the stopper concave portion 206, so that a reliable stopper action can be obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric retractable door mirror mounted on a vehicle body such as a door of an automobile, for example. In particular, the outer dimensions can be reduced in size, and the strength of the stopper is increased, and the contact surface of the stopper is increased, so that the electric storage can reliably perform the stopper action. The present invention relates to a stopper mechanism in a door mirror.

[0002]

2. Description of the Related Art An electric retractable door mirror will be described below with reference to FIGS. In FIG. 8, hatching is omitted except for the shaft holder, the shaft, and the rotating member. In this example, an electric retractable door mirror mounted on a right door of an automobile will be described. In the figure, reference numeral 1 denotes a mirror base fixed to a door (not shown) of an automobile. A shaft holder 20 is fixed to the mirror base 1. The shaft holder 20 is provided integrally with a shaft 21 having a substantially cylindrical shape. Rotating members 2 are attached to both upper and lower ends of the fixed shaft 21 so as to be rotatable around the axis Z-Z of the shaft 21. The rotating member 2 includes a gear case 22 having an open upper part, a cover 23 attached to the edge of the upper opening of the gear case 22 in a watertight manner, and a plate housed and fixed in the gear case 22 and the cover 23. 27.

[0003] The above-mentioned rotating member 2 includes a mirror assembly 3.
Is attached. The mirror assembly 3 includes a mirror body 30 having a mirror surface (mirror surface) on its surface,
A heater (for example, a PTC planar heating element) 31 and a mirror holder 32 provided on the back surface of the mirror body 30
, A mirror housing 33 having an opening on the front surface, and a power unit 34 mounted in the mirror housing 33. The above-mentioned mirror body 30, the heater 31, and the mirror holder 32 are attached to the above-mentioned power unit 34 so as to be tiltable up, down, left and right, and are arranged at the front opening of the above-mentioned mirror housing 33.

[0004] A drive motor M is mounted and housed in the rotating member 2 described above. A speed reduction mechanism 24 and a clutch mechanism 25 are interposed between the drive motor M and the shaft 21 described above. The speed reduction mechanism 24 and the clutch mechanism 25
Are mounted and housed in the above-mentioned rotating member 2. The above-described drive motor M is configured such that the turning-side mirror assembly 3 (including the turning member 2, the driving motor M, and the turning members of the reduction mechanism 24 and the clutch mechanism 25) is fixed to the fixed mirror base 1 (shaft holder). 20 (including a fixing member of the shaft 21 and the clutch mechanism 25) between the standing position and the storage position. A unit composed of the shaft holder 20, the shaft 21, the rotating member 2, and the mirror assembly 3 is referred to as an electronic unit.

[0005] The electric retractable door mirror is provided with a stopping means. This stopping means stops the mirror assembly 3 at the standing position and the storage position by interrupting the power supply to the drive motor M when the mirror assembly 3 reaches the standing position and the storage position. Two balls 22 held on the bottom surface 221 of the second gear case 22
0, two arc grooves 200 provided on the upper surface 201 of the shaft holder 20 and engaged with the two balls 220, respectively, and a switch circuit electrically connected to the drive motor M ( (Not shown) or a mechanical switch mechanism (not shown). Note that the above-described switch circuit is formed of, for example, a PTC element or the like, and the above-described mechanical switch mechanism is formed of, for example, a limit switch.

The electric retractable door mirror is provided with a stopper mechanism. The stopper mechanism restricts the rotation range of the mirror assembly 3 between the forward tilt position and the rear tilt position, and is provided outside the bottom surface 221 of the gear case 22 and the shaft holder 20.
Are formed integrally with each other on the outer side of the upper surface 201.
In addition, the above-mentioned front refers to the traveling direction of the vehicle, and the backward refers to the opposite side of the traveling direction of the vehicle.

The above-mentioned drive motor M, switch circuit or switch mechanism, power unit 34 and heater 31 and a control switch device (not shown) and a power supply (not shown) installed in the driver's seat are connected to a harness (see FIG. 1). (Not shown).

Next, the operation of the electric retractable door mirror will be described. First, when the control switch device is operated, the drive motor M is driven to drive the speed reduction mechanism 24.
The mirror assembly 3 rotates from the standing position to the storage position, and from the storage position to the standing position, with respect to the mirror base 1 via the clutch mechanism 25 in the connected state. When the mirror assembly 3 reaches a predetermined standing position or storage position, the ball 220 contacts the standing wall (edge on the end side) of the arc groove 200, and the mirror assembly 3 is physically and forcibly moved to the standing position or storage position. Then, by the operation of the switch circuit or the switch mechanism, the power supply to the drive motor M is cut off, and the mirror assembly 3 is stopped at the upright position or the retracted position.

[0009] On the other hand, the mirror assembly 3 is manually rotated, or an object hits the mirror assembly 3 (particularly, the mirror assembly 3 located at the upright position), or the mirror assembly 3 hits an object to cushion the object. Therefore, when the mirror assembly 3 rotates, the clutch mechanism 25 is disengaged, and the mirror assembly 3 rotates between the forward tilt position and the rear tilt position. During rotation of the mirror assembly 3 due to manual operation or buffering, if the ball 220 comes into contact with the vertical wall of the arc groove 200, the ball 2
The mirror assembly 3 can continue rotating by the 20 over the vertical wall of the arc groove 200. When the ball 220 gets over the vertical wall of the arc groove 200,
The mirror assembly 3 on the rotation side moves upward with respect to the shaft 21 in the axis Z-Z direction of the shaft 21. In addition, the above-mentioned buffer means an operation of preventing components and objects of the electric retractable door mirror including the mirror assembly 3 from being damaged.

When the mirror assembly 3 is rotated manually or for buffering to reach the forwardly inclined position, one end surface 223 of the stopper projection 222 of the rotating gear case 22 is brought into contact with the stopper of the fixed shaft holder 20. When the mirror assembly 3 comes into contact with one end surface (not shown) of the projection 202 and is restricted at the forward tilt position, and when the mirror assembly 3 reaches the rear tilt position, the rotation gear case 22 is rotated. The other end surface 224 of the stopper convex portion 222 of the fixed side abuts against the other end surface 204 of the stopper convex portion 202 of the fixed shaft holder 20, and the rotation of the mirror assembly 3 is regulated at the rearwardly inclined position. It is possible to prevent the assembly 3 from rotating too much and hitting the fixed vehicle body, and damage to both or one of them.

In the above example, the storage position and the backward tilt position are the same position. For this purpose, the storage position positioning means is moved to the rearward tilt position regulating means (that is, the other end surface 224 of the stopper convex portion 222 of the gear case 22).
And the other end surface 204) of the stopper projection 202 of the shaft holder 20 in some cases. In the above-described example, the electric retractable door mirror mounted on the right door of the automobile has been described. However, the left and right of the electric retractable door mirror mounted on the left door of the automobile are reversed.

[0012]

However, the stopper mechanism in the above-mentioned conventional electric retractable door mirror is provided outside the bottom surface 221 of the gear case 22 and the shaft holder 2.
Since it is composed of arc-shaped stopper projections 222 and 202 provided integrally on the outside of the upper surface 201 of the shaft 21, there is a problem that the radial outer dimension of the shaft 21 becomes large. If this external dimension is made small, the strength of the stopper projections 222 and 202 becomes small, and the contact surfaces (end faces 223, 22) of the stopper projections 222 and 202 become smaller.
4, 204) is small and there is a problem that a reliable stopper action cannot be obtained.

The present invention relates to an electric retractable door mirror in which the outer dimensions can be made compact, the strength of the stopper is increased, and the contact surface of the stopper is increased, so that the stopper action can be reliably performed. It is to provide a stopper mechanism.

[0014]

According to the present invention, in order to achieve the above-mentioned object, opposing surfaces of a shaft holder near a shaft and a rotating member opposing each other intersect with an axial direction of the shaft. The stopper projection is provided on one of the facing surface of the rotating member and the facing surface of the shaft holder, and the stopper recess is provided on the other, respectively. And a stopper surface for regulating the forward tilting position and a stopper surface for regulating the rearward tilting position are provided in a direction intersecting the rotation direction of the mirror assembly.

As a result, the stopper mechanism in the electric retractable door mirror according to the present invention has a stopper convex portion and a stopper concave portion provided on the opposing surface of the rotating member near the shaft and the opposing surface of the shaft holder. Therefore, the outer dimensions of the stopper are within the range of the facing surface of the rotating member near the shaft and the facing surface of the shaft holder. To this end, the outside of the bottom surface 221 of the gear case 22 and the shaft holder 2
As compared with a conventional stopper mechanism in which arc-shaped stopper protrusions 222 and 202 are integrally provided outside the upper surface 201 of the shaft 0, the outer diameter dimension of the shaft in the radial direction by the thickness of the stopper protrusions 222 and 202 Can be small.

In addition, the stopper mechanism in the electric retractable door mirror according to the present invention is provided such that the stopper surface is provided in the stopper convex portion and the stopper concave portion in the direction intersecting the rotation direction of the mirror assembly, that is, in the axial direction of the shaft. Therefore, the stopper surface can be enlarged without increasing the outer diameter dimension of the shaft in the radial direction, and the thickness of the stopper convex portion and the stopper concave portion can be increased to increase the strength. For this reason, the stopper action can be reliably performed.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of a stopper mechanism in an electric retractable door mirror according to the present invention will be described below with reference to FIGS. In the drawing, the same reference numerals as those in FIGS. 7 to 10 denote the same components. In this example, an electric retractable door mirror mounted on a right door of an automobile will be described. In FIG. 1, hatching is omitted except for the shaft holder, the shaft, and the rotating member. Also,
4 to FIG. 6, the symbol F is forward, B is rearward, L
Indicates the left side, and R indicates the right side.

In the figure, reference numerals 225 and 205 denote opposing surfaces that oppose each other. The facing surfaces 225 and 205
In the vicinity of the shaft 21, the bottom surface of the gear case 22 and the top surface of the shaft holder 20 are provided with the axis Z-
It is provided in a direction intersecting (substantially orthogonal) to the Z direction. A stopper projection 226 is integrally provided on the facing surface 225 of the gear case 22, while a stopper recess 206 is provided on the facing surface 205 of the shaft holder 20. The above-mentioned stopper convex portion 226 and stopper concave portion 206 are provided with stopper surfaces 227, 207 for regulating the forward tilt position and stopper surfaces 228, 208 for regulating the backward tilt position, which are opposed to each other.
The shaft 21 is provided in a direction intersecting (substantially perpendicular to) the rotation direction of the mirror assembly 3, that is, in the axis ZZ direction of the shaft 21. In addition, the above-mentioned stopper surface 22
7, 228, 207, 208 (the length of the shaft 21 in the axis Z-Z direction) is greater than the distance by which the ball 220 climbs over the vertical wall of the arc groove 200 and the mirror assembly 3 moves upward with respect to the shaft 21. And the rotation of the mirror assembly 3 in the forward tilt position is reliably controlled.

Two balls 220 are provided on the stepped opposing surface 225 of the gear case 22, ie, the bottom surface, while the stepped opposing surface 205 of the shaft holder 20, ie, on the top surface, is provided. Two arc grooves 2
00, two balls 220 are engaged with the two arc grooves 200, respectively, and the arc groove 200 and the balls 220 constitute a means for positioning a standing position.

Since the stopper mechanism of the electric retractable door mirror according to the present invention in this embodiment has the above-described configuration, when the mirror assembly 3 is located at the upright position, the state shown in FIG. is there. When the mirror assembly 3 is rotated manually or for buffering to reach the forward tilting position, one of the stopper projections 226 of the rotating gear case 22 (for regulating the forward tilting position) has the stopper surface 2.
27 is a stopper concave portion 206 of the fixed shaft holder 20.
6 (A), and comes into contact with one of the stopper surfaces 207 (for regulating the forward tilt position), and as shown in FIG.
Is restricted in the forward tilt position. At this time, when the ball 220 climbs over the vertical wall of the arc groove 200 and the mirror assembly 3 moves upward with respect to the shaft 21. When the mirror assembly 3 reaches the rearwardly inclined position,
The other stopper surface 228 (for regulating the backward tilting position) of the stopper convex portion 226 of the rotating gear case 22 abuts on the other (for regulating the backward tilting position) stopper surface 208 of the stopper concave portion 206 of the fixed shaft holder 20. And FIG. 6 (C)
As shown in (2), the rotation of the mirror assembly 3 is restricted at the backward tilt position. As a result, it is possible to prevent the mirror assembly 3 on the rotating side from rotating excessively and hitting the vehicle body on the fixed side, thereby preventing both or one of them from being damaged.

In the above example, the storage position and the backward tilt position are the same position. For this purpose, the storage position locating means is replaced by the rearward tilting position regulating means (that is, the other stopper surface 228 of the stopper protrusion 226 of the gear case 22 and the other stopper surface 208 of the stopper recess 206 of the shaft holder 20). ing. In the above-described example, the electric retractable door mirror mounted on the right door of the automobile has been described. However, the left and right of the electric retractable door mirror mounted on the left door of the automobile are reversed.

As described above, in the stopper mechanism of the electric retractable door mirror of the present invention, the stopper projection 226 is formed on the facing surface 225 of the gear case 22 near the shaft 21.
On the other hand, since the stopper concave portions 206 are provided on the facing surface 205 of the shaft holder 20, respectively,
The outer surface of the stopper has a facing surface 225 of the gear case 22 near the shaft 21 and a facing surface 2 of the shaft holder 20.
05. For this reason, as compared with a conventional stopper mechanism in which arc-shaped stopper protrusions 222 and 202 are integrally provided outside the bottom surface 221 of the gear case 22 and the outside of the upper surface 201 of the shaft holder 20, respectively. Shaft 2 for the thickness of parts 222 and 202
1 can have a small external dimension in the radial direction.

In addition, the stopper mechanism in the electric retractable door mirror of the present invention includes the stopper surfaces 227, 228, 207,
208 is provided in a direction intersecting the rotation direction of the mirror assembly 3, that is, in the axis Z-Z direction of the shaft 21, so that the outer surface dimension of the shaft 21 in the radial direction is not increased, and the stopper surface 227, 228, 207, 208
Can be increased, and the thickness of the stopper convex portion 226 and the stopper concave portion 207 can be increased, thereby increasing the strength. For this reason, the stopper action can be reliably performed.

In the above-described embodiment, the stopper projection 226 is provided on the facing surface 225 of the gear case 22, and the stopper recess 206 is provided on the facing surface 205 of the shaft holder 20, respectively. However, conversely, a stopper recess may be provided on the facing surface 225 of the gear case 22, and a stopper protrusion may be provided on the facing surface 205 of the shaft holder 20. A stopper protrusion 226 and a stopper recess are provided on the facing surface 225 of the gear case 22, while the shaft holder 2
The stopper concave portion 206 and the stopper convex portion may be provided on the 0 opposing surface 205, respectively.

[0025]

As is apparent from the above description, the clutch mechanism in the electric retractable door mirror of the present invention has a stopper convex portion and a stopper concave portion provided on the opposing surface of the rotating member near the shaft and the opposing surface of the shaft holder. Therefore, the outer dimensions of the stopper are within the range of the opposing surface of the rotating member and the opposing surface of the shaft holder near the shaft. For this reason, as compared with a conventional stopper mechanism in which arc-shaped stopper protrusions 222 and 202 are integrally provided outside the bottom surface 221 of the gear case 22 and the outside of the upper surface 201 of the shaft holder 20, respectively. Part 2
The outer dimensions in the radial direction of the shaft can be reduced by the thickness of the shafts 22 and 202.

Further, the stopper mechanism in the electric retractable door mirror according to the present invention is provided with the stopper surface in the stopper convex portion and the stopper concave portion in the direction intersecting the rotation direction of the mirror assembly, that is, in the axial direction of the shaft. Therefore, the stopper surface can be enlarged without increasing the outer diameter dimension of the shaft in the radial direction, and the thickness of the stopper convex portion and the stopper concave portion can be increased to increase the strength. For this reason, the stopper action can be reliably performed.

[Brief description of the drawings]

FIG. 1 is a main part (an electronic unit) showing an embodiment of a clutch mechanism in an electric retractable door mirror according to the present invention.
FIG.

FIG. 2 is an exploded perspective view of a main part of a shaft holder, a shaft, and a rotating member when viewed from below.

FIG. 3 is an exploded oblique exploded perspective view of a shaft holder, a shaft, and a rotating member, which are main parts, viewed from above.

FIG. 4 is a plan view of a main part of a shaft holder and a shaft.

FIG. 5 is a bottom view of the pivot member of the main part.

FIG. 6A is an explanatory plan view at a forwardly inclined position,
(B) is an explanatory plan view in a standing position, and (C) is an explanatory plan view in a rearwardly inclined position.

FIG. 7 is a partially broken and partially transparent plan view schematically showing a general electric retractable door mirror.

FIG. 8 is a longitudinal sectional view of an electronic unit showing a clutch mechanism in a conventional electric retractable door mirror.

FIG. 9 is an exploded perspective view of the shaft holder, the shaft, and the rotating member when viewed from below.

FIG. 10 is an exploded oblique exploded perspective view of the shaft holder, the shaft, and the rotating member when viewed from above.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Mirror base, 2 ... Rotating member, 20 ... Shaft holder, 200 ... Arc groove, 205 ... Opposite surface, 206 ... Stopper concave part, 207 ... Stopper surface for restricting forward inclination position, 2
08: stopper surface for regulating the backward tilt position, 21 ... shaft, 22 ... gear case, 220 ... ball, 225 ... facing surface, 226 ... stopper protrusion, 227 ... stopper surface for regulating the forward tilt position, 228 ... backward tilt Stopper surface for position regulation, 23 ... cover, 24 ... deceleration mechanism, 25 ... clutch mechanism, 27 ... plate, 3 ... mirror assembly, Z-Z
... Axial direction of shaft, M ... Drive motor.

Claims (1)

[Claims] A mirror base fixed to a vehicle body such as an automobile door; a shaft holder and a shaft fixed to the mirror base; and a shaft fixed to the fixed shaft so as to be rotatable around the axis of the shaft. A rotating member, a mirror assembly attached to the rotating member, and a drive housed in the rotating member for rotating the mirror assembly between an upright position and a stored position with respect to the mirror base. A motor; stopping means for stopping power supply to the drive motor when the mirror assembly reaches the standing position and the storage position to stop the mirror assembly at the standing position and the storage position; and a rotation range of the mirror assembly. A stopper mechanism for regulating between a forwardly inclined position and a backwardly inclined position. The structure includes: a facing surface provided in the shaft holder and the rotating member near the shaft so as to face each other in a direction intersecting with the axial direction of the shaft; and a facing surface of the rotating member. A stopper convex portion provided on one of the opposing surfaces of the shaft holder, a stopper concave portion provided on the other, and a direction intersecting the stopper convex portion and the stopper concave portion with respect to a rotation direction of the mirror assembly. And a stopper surface for restricting the forward tilting position and a stopper surface for restricting the rearward tilting position, which are provided to face each other.