JP3181220B2 - Rearview mirror angle adjustment device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an angle adjusting device for tilting a mirror surface of a rear-view mirror mounted on a vehicle to an arbitrary angle, and more particularly to an apparatus for visually recognizing the vicinity of a rear wheel portion when the vehicle retreats. The present invention relates to a technique for changing the mirror surface angle as rapidly as possible.

[0002]

2. Description of the Related Art Generally, a door mirror mounted on a vehicle,
It is necessary to finely adjust the mirror surface angle of a rearview mirror such as an inner mirror according to a driver. Conventionally, an angle adjusting device has been used to operate such a remote control while sitting in a driver's seat. In order to tilt the mirror surface of the rearview mirror in the left-right direction and the up-down direction, the angle adjustment device arranges a movable pivot on the up-down axis and on the left-right axis with respect to the fulcrum arranged in the center, By moving the movable pivot forward and backward, the mirror surface of the rearview mirror is tilted to a desired angle. On the other hand, when the driver wants to see the vicinity of the rear wheel when the vehicle is moved backward, such as when entering a garage, it is necessary to tilt the mirror surface of the rearview mirror downward so that the field of view comes to this position. However, once the mirror angle is shifted and adjusted so that the vicinity of the rear wheel is within the visual field range, it is troublesome and troublesome to adjust the mirror angle again when driving thereafter. In view of the above, there have been conventionally known those described in Utility Model Registration No. 3003866 (hereinafter referred to as Conventional Example 1) and Japanese Patent Application No. 8-53627 (hereinafter referred to as Conventional Example 2).

FIG. 7 is an exploded perspective view showing the structure of the angle adjusting device described in the prior art example 1. As shown in FIG. 7, the angle adjusting device is prevented from rotating with respect to the front housing 101. A slide member 102 is attached. When the motor 103 for rapid change of angle is rotationally driven, the rotational driving force is transmitted to the action block 106 via the gears 104 and 105. Therefore, when the action block 106 rotates, the inner circumference of the action block 106 is rotated. The pin 115 formed on the surface slides in the groove 116 of the slide member 102, whereby the slide member 102 moves forward and backward. In conjunction with this, the adjust nut 109 also moves forward and backward, so that the mirror surface angle of the rearview mirror can be rapidly changed.

When the mirror angle is to be finely adjusted, the worm 1 is rotated by rotating the motor 107 for fine adjustment.
13, the adjustment nut 109 is rotated via the worm wheel 108, and the adjustment nut 1
09 is screwed into the screw 112 of the slide member 102, so that the adjust nut 109 moves forward and backward at a low speed.
Since the pivot 110 at the tip of 09 tilts the mirror surface, the mirror surface angle can be finely adjusted. Further, a leaf spring 114 is formed in the front housing 101, and the slide member 10 is energized by the leaf spring 114.
2 is pushed upward, so that the play of the slide member is eliminated, and the occurrence of chatter on the mirror surface is prevented.

FIG. 8 is an exploded perspective view showing the configuration of a rearview mirror angle adjusting device described in the second conventional example. As shown in FIG. Is attached,
At the periphery of the male screw 123 of the slide member 122, there is disposed a quick-angle-changing gear 125 having a female screw 124 screwed with the male screw 123. When the rapid-angle-changing motor 126 is driven to rotate, the rapid-angle-changing gear 125 is rotated via the worm 127 and the gears 128 and 129. It will move up and down. Thereby, the angle of the mirror surface ( not shown ) of the rear-view mirror abutting on the tip of the adjustment nut 130 changes rapidly.

On the other hand, when the mirror angle is finely adjusted, the adjustment nut 130 is rotated via the worm 132 and the mirror adjustment gear 133 by rotating the fine adjustment motor 131 to rotate. Since the claw 134 of the nut is screwed into the screw portion 135 of the slide member, it moves forward and backward with the rotation, so that the mirror surface angle can be finely adjusted. Further, when the quick change motor 126 is driven to quickly slide the adjustment nut 130 downward, the claw 134 is
In order to prevent the intermediate plate 136 from coming off, a tapered portion 137 is formed on the inner peripheral surface of the intermediate plate 136. That is, the nail 13
When the abutment 4 comes into contact with the tapered portion 137, the claw 134 is urged to be pressed inward, so that the claw 134 does not come off from the screw portion 135. Further, since the slide member 122 and the quick-change gear 125 are screwed together with screws, the slide member can be moved forward and backward with a small driving force.

[0007]

However, in the above-mentioned conventional example 1, a pin 115 is formed on the inner peripheral surface of the action block 106, and the action block 1 slides in a groove 116 formed in the slide member 102.
06 is configured to move forward and backward, so that the thickness of the large diameter portion of the slide member 102 must be larger than １ ／ of the thickness of the action block 106. Less than,
This will be described with reference to the cross-sectional view shown in FIG. 9. Assuming that the thickness of the action block 106 is H, the pin 115 is formed substantially at the center, that is, at the position of H / 2, so If the distance is L, (H /
2) The thickness H needs to be set so as to satisfy> L. In order for the slide member 102 to slide smoothly without getting out of the groove 116, the thickness of the large diameter portion of the slide member 102 must be H / 2 or more. For this reason, the thickness of the large-diameter portion of the slide member 102 cannot be made smaller than a predetermined value, resulting in an increase in the size of components and an increase in cost.

In addition, since a worm and a worm wheel are used to rotate the action block 106 as shown in FIG. 7, there is a disadvantage that power transmission efficiency is poor. Therefore, as shown in FIG. 8 of the second conventional example, the slide member 122 can be screwed into the slide member 122 with a small torque so that the gear 125 for rapid angle change and the slide member 122 are screwed together.
Can be moved forward and backward. However, this method has a drawback that the moving distance of the slide member 122 with respect to the rotation speed of the quick-deflection gear 125 is small, so that the moving speed of the slide member 122 is reduced. The present invention has been made to solve such a conventional problem,
The purpose is to adjust the angle of the rearview mirror so that the thickness of the large-diameter portion of the slide member can be reduced, and the slide member can be moved forward and backward instantaneously even with a small-torque quick-bending motor. It is to provide a device.

[0009]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a rapid change in a rearview mirror angle adjusting device.
A spiral groove is formed on the inner periphery of the square gear for vertical adjustment.
Make the male screw engaged with the pivot move forward and backward greatly.
It is a thing. That is, the tip of the mirror holder
It has a pivot that abuts on the front side, and a mirror holder at the rear end.
With a claw that engages with a male screw
Through the adjustment nut and the adjustment nut
It has a cylindrical shape that can pass through, and gear teeth are engraved on the outer periphery
Gear for adjusting the mirror surface and the gear for adjusting the mirror surface
Motor for fine adjustment that gives rotational power
Fine adjustment of the horizontal and vertical angles of the mirror surface
On the other hand, when reversing the vehicle, lower the mirror surface to
Angle adjustment of the rearview mirror that enables quick deflection operation in the direction
Device with gear teeth on the outer periphery and helical grooves on the inner periphery
To be rotatable with respect to the front housing.
The gear for quick bending and the front housing
Rotation is prevented and the adjuster is
Male screw that engages with the tongue pawl and the gear
A slide member formed with a projection engaging with a spiral groove
And meshes with the gear teeth to apply rotational power to the gear for rapid deflection.
And a motor for rapid change in angle.
Is a speed reduction mechanism that reduces the speed by engaging two or more spur gears
Is characterized by being built in .

Further, between the mirror surface adjustment gear and rapid deformation gear, and Kai置the intermediate plate having an opening for penetrating the male screw, the openings of the intermediate plate Ajasutona'
Contact portion between bets pawl is characterized in that it is substantially the same tapered surface as nails. According to the present invention configured as described above, since the projection of the slide member is screwed into the spiral groove formed on the inner peripheral side of the gear for rapid change in angle and slides, the slide member moves forward and backward. distance to be able to a take a large, Ru can be made thinner the thickness of the gear for the rapid deformation. Also,
Since the speed reduction mechanism configured by meshing two or more spur gears is attached to the motor for rapid change in angle and the speed is reduced, the reduction mechanism can be downsized and the transmission efficiency of the rotational power can be improved. it can. Furthermore, since the periphery of the through hole of the intermediate plate is tapered, even if the pressing member is suddenly pulled downward, it does not come off from the male screw of the slide member, thereby preventing the mirror angle from shifting. become able to.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1A is a perspective view showing the configuration of an embodiment of a rearview mirror angle adjusting device to which the present invention is applied, and FIG. 1B is an exploded perspective view of a tilting mechanism for tilting a mirror surface in a vertical direction. FIG. 2 is a plan view. FIG.
(A), as shown in FIGS. 2 and 4, the mirror to a support socket 45 is formed in the housing of the mirror angle adjustment device
The tilting pivot 44 of the holder 42 is fitted to the mirror mirror surface.
Hold. The pivots 3 and 4 formed at the tips of the adjustment nuts 1 and 2 are fitted into a pivot receiver 47 provided on the back surface of the mirror holder 42 , and the pivots 3 and 4 are moved forward and backward so that the mirror surface is moved in the left-right direction and the up-down direction. Tilt . That is, the adjust nut 1 moves forward and backward by reversibly driving the left and right tilt motor 5, so that the mirror surface engaged with the pivot 3 tilts in the left and right direction with the move of the adjust nut 1. On the other hand, when the fine adjustment motor 6 in the vertical direction is driven, the adjusting nut 2 moves forward and backward, so that the mirror surface engaged with the pivot 4 tilts in the vertical direction with the moving forward and backward of the adjusting nut 2. become.

Further, when it is desired to view the vicinity of the rear wheel portion of the vehicle, for example, when the vehicle retreats, the motor 7 for rapidly changing the angle is used.
, The slide member 9 with which the adjustment nut 2 is screwed is rapidly moved forward and backward, whereby the mirror surface can be instantaneously tilted in the vertical direction. FIG.
As shown in (b), the tilting mechanism in the up-down direction includes a slide member 9 arranged so as to be prevented from rotating with respect to the front housing 8, a drive gear 11, and an intermediate plate 12.
, A mirror adjusting gear 13, an adjust nut 2, and a motor for rapid change of angle 7.

The front housing 8 has a circular recess 34.
Are formed, and two rotation stoppers 10 are implanted inside the circular concave portion 34. The slide member 9 is 2
An adjusting screw 16 for screwing with the adjust nut 2 is screwed into the small-diameter portion as described later, and a key groove 14 fitted with the rotation stopper 10 is provided in the large-diameter portion.
Are formed, and the projections 15 are formed at two places. The drive gear 11 has a cylindrical shape, a gear groove 17 is engraved on an outer peripheral portion, and a spiral groove 18 with which the protrusion 15 is screwed and slid is formed on an inner peripheral portion. . The adjusting nut 2 has a spherical pivot 4 attached to a tip end thereof, and a rear end opposite to this is branched into a plurality of parts, and each of the branched ends has an adjusting screw 16 of the slide member 9 and a screw. A matching claw 19 is attached. A gear 1 for mirror surface adjustment is provided on a side surface of the adjustment nut 2.
A fin 20 is formed to prevent relative rotation between the fin 20 and the fin 20.

The mirror adjusting gear 13 has a substantially cylindrical shape, and a gear groove 21 for transmitting rotational power from the fine adjusting motor 6 shown in FIG. Further, a notch 22 for locking the fin 20 is formed on the inner peripheral side. An opening 23 through which the adjustment screw 16 passes is formed in the center of the intermediate plate 12, and is provided between the mirror adjusting gear 13 and the driving gear 11. The peripheral portion of the opening 23 has a tapered surface as in FIG. 8 which has already been described in the conventional example, and when the adjusting nut 2 comes into contact with the claw 19, the claw 19 is pressed inward by the tapered surface. By doing the nail 19
From the adjustment screw 16 can be prevented.

As will be described later, the motor for rapidly changing the angle 7
It has a structure with a built-in reduction gear, and the rotational driving force of the motor 7 is transmitted to the rapid-angle-changing gear 11 via the idle gear 24. FIG. 3 (a) is an explanatory view showing the state of connection between the quick-change-angle motor 7 having a built-in reduction gear and the quick-change-angle gear 11, and FIG. 3 (b) shows the reduction gear. FIG. 3 is an explanatory diagram showing a detailed configuration of the embodiment. FIG.
As shown in the figure, the rotary shaft 25 of the motor for rapid change of angle 7 can be rotated together with a motor pinion 27 by a key 26, and a second gear 29 is further loosely supported on the rotary shaft 25. ing. A first gear 28 and a third gear 30 are provided on a rotating shaft 32 arranged near the side of the rotating shaft 25.
Are loosely supported on the shaft 32, respectively. Then, the motor pinion 27 and the first gear 28 mesh with each other, the first gear 28 and the second gear 29 mesh with each other, and further,
Since the second gear 29 and the third gear 30 are meshed with each other, the rotational power transmitted to the motor pinion 27 is sequentially reduced while rotating through the first gear 28, the second gear 29, and the third gear 30. The output gear 31 is transmitted to the output gear 31 that is supported by the shaft 33, whereby the output gear 31 rotates at a reduced rotational speed corresponding to the gear ratio of each gear. Then, FIG. 3 (a), the output gear 31 of the rotary shaft idle gear 24 rapidly bending gear 11 via the
Will be transmitted to

FIG. 4 is a cross-sectional view showing the structure of a rearview mirror equipped with the angle adjusting device shown in FIG. 1. As shown in FIG.
2 and a tilting pivot 44 having a spherical shape is attached to the center of the mirror holder 42. Then, the cap support 43 and the socket 45
Thus, the tilting pivot 44 is sandwiched between them, and further tightened with the screw 46 so that the mirror surface 41 can tilt with respect to the front housing 8 side. And the pivot 4 at the tip of the adjusting nut 2 is the mirror holder 4
2 is engaged with a pivot receiver 47 formed on the back surface of the adjustment nut 2 so that the mirror surface 41
Can be tilted up and down.

Next, the operation of the present embodiment configured as described above will be described. When finely adjusting the mirror surface angle by tilting the mirror surface 41 shown in FIG. 4 in the vertical direction, FIG.
Is driven to rotate. As a result, the rotational power is transmitted to the mirror adjusting gear 13 shown in FIG. 1A, so that the mirror adjusting gear 13 rotates , and the adjustment nut 2 whose rotation is prevented from the mirror adjusting gear 13 is prevented. It rotation also forced. At this time, the pawl 19 of the adjusting nut 2 is connected to the adjusting screw 16 of the slide member 9.
To adjust nut 2 with rotation.
Moves forward and backward, and the mirror surface 41 shown in FIG. 4 can be tilted up and down.

When it is desired to visually recognize the vicinity of the rear wheels of the vehicle, for example, when entering a garage, the motor 7 for rapidly changing the angle shown in FIG. 1A is driven to rotate, as shown in FIG. 3A. The idle gear 24 rotates via the output gear 31 of the rapid-angle changing motor 7, and the rapid-angle changing gear 11 meshing with the idle gear 24 also rotates . Rapid deflection
When the gear 11 rotates, the protruding portion 15 of the slide member 9, which is prevented from rotating with respect to the front housing 8, slides on the spiral groove 18 on the inner peripheral surface of the gear for rapid change of angle 11, as shown in FIG. The slide member 9 moves forward and backward. Since the pitch of the spiral groove 18 is significantly larger than the pitch of the adjusting screw 16, the ratio of the forward / backward movement to the rotation angle of the gear 11 for rapid change in angle is significantly increased. Therefore, the slide member 9 moves forward and backward rapidly, and the angle of the mirror surface 41 (see FIG. 4) is rapidly tilted up and down by the adjusting nut 2 which moves forward and backward . Consequently Figure 5 in the plane 41 as shown in the tilting downward instantaneously, the driver will be able to put into the field of view of the wheel near the rearview mirror after the vehicle immediately.

[0019] will be described with reference to the cross-sectional view showing a state of coupling between the slide member 9 and the quick deformation gear 11 at this time is shown in FIG. 6, the projection 15 on the large-diameter portion 9a has an outer peripheral portion of the sliding member 9 There therefore may be formed so thin to Rukoto thickness as compared with the case of FIG. 9 shown in the conventional example. As apparent from FIG. 6, the slide member 9 Ru can make forward and backward movement with a thickness thick range of distance minus the thickness T L'diameter portion of the slide member 9 H of the drive gear 11.
This distance L'half the thickness H of the rapid bending gear 11 H /
2, when the drive gears 9 having the same thickness are used, the width of the forward / backward movement can be made larger than that shown in FIG. 9 and, consequently, the mirror surface 41 (FIGS. 4 and 5).
Can take a large tilt angle.

[0020] Thus, according to this embodiment, the projections 15 formed on the large diameter portion outer peripheral side of the sliding member 9, screwed them to form a spiral groove 18 on the inner peripheral side of the drive gear 11 Since the sliding member 9 is slid, the moving distance of the sliding member 9 can be increased, and the tilt angle of the mirror surface can be increased . Further, if the same forward and backward distances Conversely, rapid
It is possible to thin the thickness of the bending gear 11, Ru can be thin to Rukoto the thickness of the entire angle adjustment device. More rapidly
In order to rotate the bending gear 11, using the rapid bending motor 7 with the reduction gear, the worm as in the prior art, does not use the worm wheel, it is possible to miniaturize the entire device and, The axial thrust when the slide member 9 is moved forward and backward can be improved . Furthermore, the worm, by not using the worm wheel, Ru can be performed inversion operation smoothly because there is no addition of thrust load on the motor. In addition, since the periphery of the opening 23 of the intermediate plate 12 is formed in a tapered shape, the mirror surface 41 is formed.
Even when is rapidly tilted downward, the pawl 19 of the adjusting nut 2 does not come off from the adjusting screw 16, so that it is possible to prevent a positional shift of the mirror surface angle.

[0021]

As described above, according to the present invention,
Is projecting piece is formed on the outer peripheral side of the sliding member, since the spiral groove on the inner peripheral side for rapid bending <br/> formic ya is formed, even if the thickness of the gear for rapid deformation of the mirror surface Since the angle can be greatly changed, the gear for rapid changing angle can be reduced in thickness, and the entire apparatus can be made compact. Further, since the motor for rapidly changing the angle with the speed reduction mechanism is used, the size of the entire apparatus can be reduced, and the power transmission efficiency can be improved. Furthermore,
Since no thrust load is applied to the motor shaft as compared with conventional worms and worm wheels, the reversing operation can be performed smoothly.

[Brief description of the drawings]

FIGS. 1A and 1B show a configuration of a rearview mirror angle adjusting device according to an embodiment of the present invention, wherein FIG. 1A is a perspective view, and FIG.
FIG. 3 is an exploded perspective view of a direction adjusting mechanism and a quick bending mechanism .

FIG. 2 is a plan view of the angle adjusting device according to the embodiment.

FIG. 3 shows the arrangement from a motor for rapid deflection to a gear for rapid deflection.
(A) shows the motor for rapid deflection and idle gear.
The cross-sectional view (b) showing the connection between the gear and
FIG . 3 is a cross-sectional view showing a reduction gear train in the speed changing motor .

FIG. 4 is a cross-sectional view of the angle adjusting device according to the embodiment.

FIG. 5 is a sectional view showing a state where the mirror surface is rapidly deflected downward.

FIG. 6 is a cross-sectional view showing details of a connection state between the slide member and the gear for rapid angle change .

FIG. 7 is an exploded perspective view showing a configuration of an angle adjusting device described in Conventional Example 1.

FIG. 8 is an exploded perspective view showing a configuration of an angle adjusting device described in Conventional Example 2.

FIG. 9 is a cross-sectional view showing a conventional connection state between a slide member and a gear for rapid change of angle .

[Explanation of symbols]

 1,2 adjust nutG  3, 4 pivot 5 Left / right tilting motor 6 Fine adjustment motor 7 Rapid change angle motor 8 Front housing 9 Slide member 10 Rotation stop 11 Rapid change angle gear 12 Intermediate plate 13 Mirror surface adjustment gear 14Slide memberLongitudinal groove 15 Projection 16 Adjust screw 17 Gear tooth 18 Spiral groove 19 Claw 20 Fin 21 Geartooth  Reference Signs List 22 Notch 23 Opening 24 Idle gear 25 Rotary shaft 26 Key 27 Motor pinion 28 First gear 29 Second gear 30 Third gear 31 Output gear 32, 33 Rotary shaft 41mirrorSurface 42 Mirror holder 43 Cap support 44 Tilt pivot 45socket 46 screw 47 pivot receiver

Claims (2)

(57) [Claims] 1. A back surface of a mirror holder (42) at a tip portion.
With pivots (3, 4) that abut against the
Has a claw that is screwed into a male screw
Adjusting nuts (1, 2) to be adjusted and the adjusting nut
It has a cylindrical shape that allows the
A mirror-adjusting gear (1) having gear teeth (21) engraved on the periphery.
3, 13) and the gear for adjusting the mirror surface, and the rotational power
Motor for fine adjustment (5, 6)
Fine adjustment of the horizontal and vertical angles of the mirror surface
On the other hand, when reversing the vehicle , lower the mirror surface to
Angle adjustment of the rearview mirror that enables quick deflection operation in the direction
The device has gear teeth (17) on the outer periphery and helical grooves (1) on the inner periphery.
8) to form a turn with respect to the front housing (8).
The rotation of the gear (11), which can be freely moved , and the front housing (8) is prevented.
And the adjust nut claw on the outer periphery of the cylindrical shape.
Male screw (16) engaging with (19)
Projections (15, 15) engaging with the spiral groove (18) of the
A gear (11) meshing with the slide member (9) formed with a gear and the gear teeth (17).
And a motor for rapid change of angle (7)
The motor (7) for rapidly changing the angle engages two or more spur gears.
It has a built-in deceleration mechanism for decelerating
Rearview mirror angle adjustment device. 2. An opening (2) for penetrating a male screw between the mirror adjusting gear (13) and the gear changing gear (11).
Intermediate plate (12) having 3) is interposed ,
2. The angle adjusting device for a rearview mirror according to claim 1 , wherein the contact portion of the adjustment nut with the claw of the adjusting nut has substantially the same tapered surface as the claw .