JPH0650989U - Rearview mirror angle adjustment mechanism - Google Patents

Abstract

(57) [Summary] [Purpose] When the mirror angle is tilted downward as much as possible, the rearview mirror angle adjustment mechanism is structured so that the adjusting nut does not come off the adjusting screw even if an outward force is applied to the mirror holder. To provide. [Structure] A tip end of an adjusting nut 24 is rotatably connected to a back surface of a mirror holder 11, and a female screw portion provided on the adjusting nut 24 is screwed into an adjusting screw 30 which is prevented from rotating. In a rear-view mirror angle adjusting mechanism in which the motor M1 is rotationally driven so as to be movable back and forth, and further the adjustment screw 30 is movable forward and backward by rotating the second motor M2, the tip of the adjusting nut is rotated the mirror holder 11. It is connected to the upper part from the center point.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a rearview mirror mounted on a vehicle, and more particularly to a rearview mirror angle adjusting mechanism capable of instantaneously adjusting an angle at which the vicinity of a rear wheel of the vehicle can be visually recognized when the vehicle moves backward.

[0002]

[Prior art]

 As is well known, a rearview mirror mounted on a vehicle can be finely adjusted in a mirror angle by manual or electric remote operation according to a physique of a driver. In the electric remote control mechanism, the central portion of the mirror holder is pivotally connected to an actuator unit arranged in the mirror body, and the actuator is operated by separate actuators for left and right and up and down. In addition, the rearview mirror is usually set at an angle that allows you to see the rear of the vehicle and you cannot see the rear wheels, so when you put the shift lever into the back when the vehicle is backing, the rearview mirror instantly turns downward. Those equipped with a mechanism have also been proposed. This mechanism for changing the angle instantaneously connects the tip of the adjustment nut rotatably below the center of rotation on the rear surface of the mirror holder, and screws it into the adjustment screw that stops the female screw part provided on the adjustment nut. The adjustment nut is rotatably driven by the first motor to finely adjust the mirror in the vertical direction, and the adjustment screw is connected to the second motor, and the adjustment screw is rotated by the rotation of the second motor. When the cast screw is pulled, the mirror instantly rotates downward.

[0003]

[Problems to be solved by the device]

 By the way, in the angle adjustment mechanism with the above-mentioned configuration, when the momentary downward mechanism is operated to tilt the mirror angle downward to the maximum, if the upward force is applied to the mirror holder, the adjusting nut may come off from the adjusting screw. There is. In order to prevent this disengagement, it is conceivable to install a stopper to regulate the upward rotation, but since it has a reverse mechanism, even if a stopper is set, the reverse amount Can not be installed because it touches downward. The present invention has been made to eliminate the above-mentioned conventional problems. The purpose of the present invention is to simplify the structure and to activate the instantaneous downward mechanism to tilt the mirror angle downward to the maximum extent. The purpose of the present invention is to provide a rearview mirror angle adjustment mechanism in which the adjustment nut does not disengage from the adjustment screw even when upward force is applied to the mirror holder.

[0004]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the present invention rotatably connects the tip of an adjusting nut to the back surface of a mirror holder, and the female screw portion provided on the adjusting nut is screwed into an adjusting screw which is not rotated, In the angle adjusting mechanism of the rearview mirror, the adjustment nut is rotationally driven by the first motor so that the adjustment nut can move forward and backward, and the adjustment screw can also move forward and backward by the rotation of the second motor. The mirror holder is connected above the center of rotation.

[0005]

【Example】

 The present invention will be described in detail with reference to the illustrated embodiments. FIG. 1 is a rear view mirror to which the angle adjusting mechanism of the present invention is applied. In the figure, reference numeral 10 is a mirror body, and 11 is a mirror holder for holding a mirror 12. The mirror holder 11 is pivotally connected to the actuator unit housing 13 whose central portion is fixed in the mirror body 10, and the vertical angle adjusting mechanism and the horizontal angle adjusting mechanism arranged in the housing 13 make the mirror angle a predetermined angle. Can be adjusted. The angle adjusting mechanism of the present invention relates to an up-down angle adjusting mechanism, and the left-right angle adjusting mechanism is the same as the conventional one, so a detailed description thereof will be omitted.

The mirror vertical angle adjusting mechanism 20 of the present invention comprises a fine adjusting mechanism 20A for adjusting the angle according to the physique of the driver during normal traveling, and an instantaneous adjusting mechanism 20B for instantaneously adjusting the angle during backward driving. It is configured.

The fine adjustment mechanism 20A includes a first motor M1 arranged in the actuator unit housing 13, a worm 21 attached to the output shaft of the motor, a worm wheel 22 meshing with the worm, and a pivot 23 at the tip. The adjusting nut 24 is used as a main member. That is, the worm wheel 22 attached to the output shaft of the first motor M1 is meshed with the worm wheel 22, and a through hole 25 is provided in the center of the wheel 22, and the inner wall of the through hole 25 moves vertically in the axial direction. The groove 26 is provided in. A pivot 23 is provided on the tip side of the adjusting nut 24, and the pivot 23 is fitted to a hemispherical seat 27 provided above the pivot 14 which is the rotation center point of the mirror holder 11. On the other hand, a convex portion 28 is formed on the outer wall side of the adjust nut 24, and the convex portion 28 is loosely fitted in the groove 26 provided in the through hole 25 of the worm wheel 22 so as to be slidable with respect to the worm wheel 22. Further, a plurality of claws 29 are provided on the rear end portion of the adjust nut 24 so as to project inward, and the claws 29 are screwed into an adjust screw 30 which is prevented from rotating by the housing 13. When the first motor M1 is rotated by a predetermined switching operation, the upper / lower angle fine adjustment mechanism 20A having the above-mentioned configuration transmits this rotation to the adjust nut 24 via the worm 21 and the worm wheel 22, and the adjust nut 24 is rotated. Rotates in a predetermined direction. At this time, the claw 29 of the adjusting nut 24 is screwed with the adjusting screw 30, but since the adjusting screw 30 is prevented from rotating, the adjusting nut 24 slides and the sliding adjusts the mirror angle.

Next, the mirror angle instant adjustment mechanism 20B will be described. As shown in FIG. 1, this mechanism 20B is provided with a second motor M2 arranged on the rear side of the mirror angle fine adjustment mechanism 20A, a worm 31 attached to the output shaft, and a worm wheel 32 meshing with the worm as main constituent members. To do. That is, the worm wheel 32 is engaged with the worm 31 attached to the output shaft of the second motor M2. The worm wheel 32 has fan-shaped teeth 32a, has a diameter larger than that of the worm wheel 22 that constitutes the angle fine adjustment mechanism 20A, and has a through hole 33 in the center, and a slide member 34 is inserted into the through hole 33. It is fitted. The slide member 34 is cylindrical and has a pair of spiral grooves 35 on its outer peripheral wall, and a pin 36 is inserted into the groove from the outer peripheral wall of the worm wheel 32. The front end side holds the adjusting screw 30 that constitutes the mirror angle fine adjustment mechanism 20A, and the rear end portion of the receiving portion 13b provided on the rear wall 13a of the actuator unit housing 13 in the detent groove 37 as shown in FIG. When the projection 38 is fitted, normally, as shown in FIG. 1, the rear end side of the slide member 34 is brought into contact with the rear wall 13a side of the actuator unit housing 13 which houses the mirror angle instant adjustment mechanism 20B, and the slide member 34 A gap S is provided between the front end portion of the housing and the front wall 13c of the housing, and it is slidable forward in the range of this gap.

On the other hand, a stopper 40 is formed at the lower end of the rear side of the mirror holder 11 so as to come into contact with the actuator unit housing 13 when the mirror holder 11 is tilted downward at the maximum.

In normal driving, the mirror angle instant adjustment mechanism 20B has a rear end side of the slide member 34 on the rear side of the actuator unit housing 13 that houses the mirror angle instant adjustment mechanism 20B as shown in FIG. It is in a state of being in contact with the wall 13a side and providing a gap S between the front end portion of the slide member 34 and the housing front wall 13c. When it is necessary to visually recognize the rear wheel direction of the vehicle from this state, the second motor M2 is rotated in a predetermined direction by an appropriate switching operation, and this rotation is transmitted from the worm 31 to the fan-shaped teeth 32a of the worm wheel 32. The warm wheel 32 is rotated. A pin 36 is provided on the inside of the worm wheel 32 so as to project therein, and the pin is engaged with a spiral groove 35 of a slide member 34 fitted in a through hole 33 of the wheel wheel, and the slide member 34 is attached to the housing 13. Since it is prevented from rotating, the pin 36 slides in the spiral groove 35 of the slide member 34, slides the slide member 34 forward, and pushes it until the front end portion of the slide member 34 comes into contact with the front wall 13c of the housing 13. put out. Since the adjusting screw 30 is fixed to the front end portion of the slide member 34, the mirror holder 11 is instantly in the downward state, and is rotated and held at a predetermined angle until the stopper 40 comes into contact with the actuator unit 13. (Figure 3).

When the second motor M2 is rotated in the opposite direction to the above when the rear view is finished and the mirror angle is changed for the normal traveling state, the worm 31 and the worm wheel 32 move in the opposite direction. The slide member 34 slides backward by the rotation of the worm wheel 32, and at the same time, the adjusting screw 30 draws the mirror holder 11 and the mirror holder 11 is instantly changed and held from the downward state to the normal running state. (Figure 1).

Since the angle adjusting mechanism of this embodiment has the above-mentioned configuration, even if the angle is adjusted from the normal use position to the maximum downward position, even if the mirror holder is aimed further downward than electric or pranks, etc. Since the stopper protruding from the mirror holder is in contact with the actuator unit housing, the mirror holder cannot be rotated any further, and the adjustment nut will not come off. When force is applied upward, the tip of the adjusting screw comes into contact with the inner wall of the adjusting nut to form a stopper.

It is needless to say that the present invention is not limited to the above-described embodiments, and various modifications and design changes can be made without departing from the spirit of the invention.

[0014]

[Effect of device]

 Since the present invention has the above-mentioned configuration, when the mirror holder is in the maximum downward state, the adjustment nut does not come off even when an external force is applied to the mirror holder, and it is possible to always perform stable mirror angle adjustment.

[Brief description of drawings]

FIG. 1 is a partially cutaway side view of a main part of a door mirror equipped with an angle adjusting mechanism of the present invention.

FIG. 2 is an exploded perspective view showing a main part of an adjusting mechanism.

FIG. 3 is a diagram showing tilting of a mirror.

[Explanation of symbols]

 10 mirror body 11 mirror holder 12 mirror 13 actuator unit housing 13a rear wall 13b receiving portion 13c front wall 14, 23 pivot 20 mirror angle adjusting mechanism 21, 31 worm 22, 32 worm wheel 24 adjust nut 25, 33 through hole 26 groove 27 hemispherical receiving part 28 convex part 29 claw 30 adjusting screw 32a fan-shaped tooth 32b fan-shaped tooth end face 34 sliding member 35 spiral groove 36 pin 37 whirl-stop groove 38 protrusion 40 stopper

Claims (2)

[Scope of utility model registration request] 1. A tip of an adjusting nut is rotatably connected to a rear surface of a mirror holder, and a female screw portion provided on the adjusting nut is screwed into an adjusting screw which is prevented from rotating, and the adjusting nut is driven by a first motor. In a rear-view mirror angle adjusting mechanism with a reverse lock in which the adjusting screw is rotatable and is movable back and forth, and further, the adjusting screw is movable forward and backward by rotating a second motor, in which a tip of the adjusting nut is located at a rotation center point of a mirror holder. An angle adjustment mechanism for the rearview mirror, which is connected to the top. 2. The rear-view mirror angle adjusting mechanism according to claim 1, wherein a stopper for restricting a maximum downward angle of the mirror holder is provided on the back surface of the mirror holder.