JP3425685B2 - 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 a tilting operation of a mirror surface of a rearview mirror mounted on a vehicle at an arbitrary angle.
The present invention relates to an angle adjusting device.

[0002]

2. Description of the Related Art Generally, a door mirror mounted on a vehicle,
In the rearview mirror such as the inner mirror, the mirror surface angle needs to be finely adjusted according to the driver. In order to perform such an operation by remote control while sitting in the driver's seat, an angle adjusting device has been conventionally used. The angle adjusting device, in order to tilt the mirror surface of the rearview mirror in the horizontal direction and the vertical direction, arranges movable pivots on the vertical axis and the horizontal axis with respect to the fulcrum arranged at the center, By moving the movable pivot forward and backward, the mirror surface of the rearview mirror is tilted at a desired angle. On the other hand, when the driver wants to see the vicinity of the rear wheels when moving the vehicle backwards, such as when entering the garage, it is necessary to tilt the mirror surface of the rear-view mirror downward so that the field of view comes to this position.

However, once the mirror angle is shifted so that the vicinity of the rear wheel is adjusted to be in the field of view, it is troublesome and troublesome to adjust the mirror surface angle again when driving thereafter. Therefore, conventionally, as described in, for example, Japanese Utility Model Laid-Open No. 6-68992 microfilm, a drive unit for finely adjusting the mirror surface angle and a drive unit for making a sudden change are provided, and each drive unit is used. It is known that the mirror surface angle is finely adjusted or abruptly changed so that the vicinity of the rear wheel is switched to the visual field range.

FIG. 7 and FIG. 8 show the above-mentioned actual Kaihei 6-68992.
FIG. 8 is an explanatory view schematically showing the contents of the angle adjusting device described in the No. microfilm, FIG. 7 is an exploded perspective view, and FIG. 8 is a sectional view. As shown in FIG. 7, the angle adjusting device includes a front housing 101 and a slide member 10.
2, action block 103, support member 104,
The fan gear 105, the worm wheel 106, the rear housing 107, and the nut adjust 108 are coaxially connected to each other, and further, the second motor 11 for finely adjusting the mirror surface is provided.
No. 1 and the second motor 111 are provided with a worm 110 that is screwed to the worm wheel 106, and a first motor 113 for sudden mirror surface change and a worm that is axially attached to the first motor 113. 112 and a twin gear 109 interposed between the worm 112 and the fan-shaped gear 105 .

Then, as shown in FIG. 8, when the second motor 111 is driven to rotate the worm 110, the worm wheel 106 rotates, and the nut adjust 108 also rotates accordingly. Further, since the slide member 102 is prevented from rotating with respect to the front housing 101, the claw 11 of the nut adjust 108 is provided.
4 rotates about the screw portion 115 of the slide member 102 to move up and down in the vertical direction, and the mirror surface 119 is moved by the movable pivot 116 at the tip of the nut adjust 108.
Can be tilted.

On the other hand, when the first motor 113 is driven to rotate the worm 112 (not shown in FIG. 8), the fan gear 105 is rotated via the twin gear 109, and accordingly, the action block is rotated. 103 rotates. Then, the pin 11 of the action block 103
The slide member 102 is engaged with the cam groove 118 of the slide member 102.
Since the rotation is blocked with respect to 1, the pin 117 slides along the cam groove 118, so that the slide member 1
02 will move forward and backward. Therefore, the position of the nut adjust 108 suddenly changes, which causes the angle of the mirror surface 119 to change abruptly. For example, when the vehicle moves backward, the mirror surface 119 is tilted downward so that the vicinity of the rear wheel can be seen. The mirror angle can be immediately returned to the original position by rotating the first motor 113 in the reverse direction.

Further, the operation of the first motor 113 is interlocked with the gear operation of the vehicle. For example, when the reverse gear is engaged, the mirror surface 119 is automatically tilted downward, and conversely, when the drive gear is engaged. It is also possible to operate so as to automatically return to the original position. Further, when the nut adjust 108 moves forward and backward and the angle of the mirror surface 119 reaches the end of the swing angle, the nut adjust 108 cannot move forward and backward. Therefore, if the motor is operated further in the same direction in this state, the motor may be energized while the rotation is locked, and the motor may be burnt. Therefore, the claw 114 of the nut adjust 108 is screwed on the screw part of the slide member 102. By slipping from the groove of 115, it is possible to act as a clutch and prevent burnout of the motor.

[0008]

However, in the above-mentioned conventional example, when the reverse operation (rapid angle changing operation) is performed with the mirror surface facing downward, the vehicle battery voltage becomes high or low, the torque of the first motor 113, or the like. Due to the variation in the deformation load of the claw 114 of the nut adjust 108, FIG.
As shown, the nut adjust 108 may slip and the position of the mirror surface may shift during the return operation, and there has been a demand to completely eliminate this position shift. Therefore, if the holding force of the claw 114 of the nut adjust 108 is made sufficiently large to solve this drawback, slippage at the end of the mirror deflection angle is less likely to occur during mirror surface adjustment. Since the size of the unit must be increased and a reduction gear must be added, a new problem arises that the size of the entire unit is increased and the number of parts is increased.

Further, a conventional angle adjusting device is shown in FIG.
As described above, since it is configured by combining a large number of parts, there are drawbacks that the structure is complicated, the cost is high, and the device is large. The present invention has been made to solve such a conventional problem, and a first object thereof is to reliably finely adjust the mirror surface angle and to adjust the sharp angle without increasing the size of the entire unit. It is an object of the present invention to provide a rear-view mirror angle adjusting device capable of changing and accurately returning. A second object is to provide a rear-view mirror angle adjusting device that can reduce the number of parts, reduce the cost, and downsize the device.

[0010]

In order to achieve the above object, the present invention finely adjusts the angle of a mirror surface mounted on a rearview mirror for a vehicle, and makes it possible to visually recognize the vicinity of a rear wheel when the vehicle retreats. In a rear-view mirror angle adjusting device capable of abruptly changing the angle, it is rotatably attached to a front housing fixed in a mirror housing, a gear groove is engraved on the outer peripheral portion, and a female screw groove is formed on the inner peripheral portion. And a first motor for rotating the mesh by rotating the gear in a cylindrical shape for rapid angle changing, meshing with an outer peripheral gear groove of the rapid angle changing gear, and an inner peripheral screw of the rapid angle changing gear. A slide member that is formed of a large-diameter screw part having a male screw groove engraved with the groove and a small-diameter screw part having a male screw groove engraved, and is prevented from rotating with respect to the front housing; A pivot that contacts the back side of the mirror surface Have the door to the tip, and the rear end portion
A pressing member having a locking piece formed on the sliding member and screwed into the small-diameter screw portion of the slide member; a mirror surface adjusting gear that rotates together with the pressing member and has a gear groove formed in the outer peripheral portion; It is interposed between the second motor that meshes with the gear groove of the gear for rotation and is rotated, and the rapid angle changing gear and the mirror surface adjusting gear, and the small-diameter screw portion of the slide member is inserted in the central portion. Through-hole is opened, and the quick angle changing gear is
Thereby rotatably supported on the cement housing, have a, and an intermediate plate for supporting rotatably the mirror surface adjustment gear in the rear housing, central through hole of the intermediate plate
On the inner surface of the
The slide member and the pressing member slide on the front housing side.
When pressed, it contacts the outer periphery of the locking piece of the pressing member and
The feature is that a tapered surface that is pressed against is formed .

Further, the outer peripheral portion of the locking piece is cut into a taper shape.
Characterized by the lack . According to the present invention configured as described above, the rapid angle changing gear is rotatably supported so as to be sandwiched between the front housing and the intermediate plate, and the mirror surface adjusting gear is rotatable so as to be sandwiched between the intermediate plate and the rear housing. Since the structure is supported , the number of parts can be significantly reduced. Also,
When the first motor is driven in order to rapidly tilt the mirror surface of the rearview mirror downward, when the first motor is driven, the taper surface formed on the inner surface of the central through hole of the intermediate plate is attached to the outside of the locking piece of the pressing member. The side surfaces are abutted and pressed inward. As a result, the locking piece is not displaced from the screw groove of the slide member, and when the mirror surface is returned to its original position, it can be reliably returned to its original angular position.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an exploded perspective view showing a configuration of an angle adjusting device for a rearview mirror to which the present invention is applied, FIG. 2 is a sectional view of the angle adjusting device, and FIG. 3 is a plan view. As shown in FIGS. 1 and 2, this angle adjusting device is mainly provided with a front housing 1 fixed to a mirror body, a rapid angle changing gear 2, a slide member 3, an intermediate plate 4, and a mirror surface adjusting gear. 5 and nut adjust (pressing member) 6
And the rear housing 37 (FIG. 2) and the second motor 10
And a first motor 12.

The slide member 3 has a structure in which a large-diameter screw portion 15 and a small-diameter screw portion 17 are concentrically connected to each other, and the large-diameter screw portion 15 is formed with two notches 16 at the front. Two fixing pins 31 provided upright on the housing 1 are fitted to prevent rotation with respect to the housing 1. A male screw groove is engraved on the outer periphery of the large-diameter screw portion 15, and a female screw groove 1 is engraved on the inner surface of the gear 2 for rapid angle changing.
4 is screwed together. A gear groove 13 is engraved on the outer peripheral surface of the rapid angle changing gear 2, and the gear groove 13 is connected to a twin gear 8 via an intermediate gear 7. The twin gear 8 has a structure in which a large-diameter gear 24 and a small-diameter gear 25 are concentrically connected to each other. The intermediate gear 7 is connected to the small-diameter gear 25 and the worm 11 is attached to the large-diameter gear 24. The first motor 12 for rapid angle change is connected via. That is, when the first motor 12 is driven to rotate,
The quick angle changing gear 2 is adapted to rotate via the worm 11, the twin gear 8 and the intermediate gear 7.

On the other hand, the small-diameter screw portion 17 of the slide member 3 is engraved with a male screw groove.
Passes through the central plate through holes of the intermediate plate 4 and the mirror surface adjusting gear 5, and then the four rear end projections 22 of the nut adjust 6
Are fixed by being screwed into the claws 23 formed at the respective tips. The nut adjust 6 has a movable pivot 20 for tilting a mirror surface attached to a tip end thereof, and a flat fin 21 on a side portion thereof.
Is attached. Then, as described above, the rear end portion is branched into the four protrusions 22, the claws 23 are formed at the tips of the respective protrusions 22, and the outer peripheral portion of the claw 23 is notched in a tapered shape. Has been. The mirror adjusting gear 5 has a locking groove 19 formed in the central through hole, and the locking groove 1
By fitting the fins 21 of the nut adjust 6 to the shaft 9, the nut adjust 6 is restricted from rotating with respect to the mirror surface adjusting gear 5.

A gear groove 30 is formed on the outer peripheral surface of the mirror surface adjusting gear 5.
A worm 9 axially attached to a second motor 10 for tilting the mirror surface 26 in the vertical direction is connected to the gear groove 30. Therefore, the second motor 10
When the lens is driven to rotate, the mirror surface adjusting gear 5 rotates via the worm 9, which in turn causes the nut adjust 6 to rotate.
Will also rotate. As shown in FIG. 2, the movable pivot 20 at the tip of the nut adjust 6 is in contact with the back surface side of the mirror holder 31 that supports the mirror surface 26. Therefore, as the nut adjust 6 moves forward and backward, the mirror surface 26 becomes a fulcrum. It tilts around 27.

The intermediate plate 4 is interposed between the rapid angle changing gear 2 and the mirror surface adjusting gear 5, and the side surface of the central through hole has a tapered surface 18 whose opening narrows from the upper side to the lower side. As will be described later, by pressing the claw 23 of the nut adjust 6 inwardly with the tapered surface 18, the claw 2 from the thread groove of the small-diameter screw portion 17 of the slide member 3 is pressed.
3 is prevented from being displaced. That is, the intermediate pre
The seat 4 also functions as a positional deviation prevention means.

Further, as shown in FIG. 2, a ring 34 is formed on the lower surface of the intermediate plate 4 concentrically with the through hole, and the ring 34 is formed on the upper surface of the rapid angle changing gear 2. The annular groove 35 is fitted in the annular groove 35, and an annular groove 38 is also formed on the lower surface of the rapid turning angle gear 2.
The ring 33 formed around the fixed pin 31 of the front housing 1 is fitted. Therefore, the quick angle changing gear 2 is rotatably fixed between the front housing 1 and the intermediate plate 4. Further, a ring 39 is formed on the lower surface side of the mirror surface adjusting gear 5, is fitted into the annular groove 36 on the upper surface of the intermediate plate 4, and the upper surface of the mirror surface adjusting gear 5 is supported by the rear housing 37. Therefore, the mirror surface adjusting gear 5 is rotatably fixed by the intermediate plate 4 and the rear housing 37.

Although not shown in FIGS. 1 and 2,
Actually, as shown in FIG. 3, a third motor 2 for tilting the mirror surface 26 in the left-right direction is actually provided inside the mirror housing.
8 and a nut adjust 29 are attached. That is, the mirror surface 26 can be tilted in the vertical direction by rotationally driving the second motor 10, and the mirror surface 26 can be tilted in the horizontal direction by rotationally driving the third motor 28. By rotating the first motor 12, the mirror surface 26 can be rapidly tilted in the vertical direction.

FIG. 4 shows a first motor 1 according to this embodiment.
It is an explanatory view showing a control circuit of 2 (motor for rapid angle change), as shown in the drawing, a relay contact Ra1 (a contact) to the power supply terminals MF, MR, a PTC for current limitation, a first motor. 12 and the resistor R3 are connected in series, and the motor 12
Both ends of the are designated as terminals T1 and T2. Also, each terminal M
A series connection of a capacitor C2 and a relay coil Rc2 and a resistor R4 are connected between F and MR. Relay contact Ra
A series circuit of a resistor R1, a relay coil Rc1 for operating the relay contact Ra1 and a parallel connection of two diodes D5 and D6 is connected between the load side of 1 and the terminal MR, and the resistor R1 is connected. A capacitor C1 is connected between a connection point P1 between the relay coil Rc1 and the relay coil Rc1 and the power source side of the relay contact Ra1.

Further, a series circuit of a phototransistor Q1 and a diode D3 and a series circuit of a diode D4 and a phototransistor Q2 are connected between the connection point P1 and the power supply terminal MR. Further, a relay contact Ra2 (a contact) operated by a relay coil Rc2 is connected in parallel to the resistor R3, and further, a parallel connection circuit of two light emitting diodes D1 and D2 and a resistor R2 is connected. , And is connected in parallel to the resistor R3. Then, the output light of the light emitting diode D1 is taken into the phototransistor Q1, and the output light of the light emitting diode D2 is taken into the phototransistor Q2.

Next, the operation of this embodiment configured as described above will be described. When the angle of the mirror surface 26 shown in FIG. 2 is adjusted to an arbitrary position in the vertical direction, the second motor 10 is rotated to rotate the mirror surface adjusting gear 5, and the mirror surface adjusting gear 5 and the mirror surface adjusting gear 5 are rotated. Since the rotation of the nut adjust 6 is blocked by the locking groove 19 and the fins 21, the nut adjust 6 also rotates as the mirror surface adjusting gear 5 rotates. The slide member 3 is fixed to the front housing 1 by the two fixing pins 31.
Since the rotation of the nut adjuster 6 is blocked, the claw 23 of the nut adjust 6 slides along the thread groove of the small-diameter threaded portion 17 of the slide member 3, and therefore the nut adjust 6 moves forward and backward. Become. That is, the angle of the mirror surface 26 of the rearview mirror can be tilted in the vertical direction by reversibly driving the second motor 10.

On the other hand, when it is desired to keep the vicinity of the rear wheel portion in the field of view of the rearview mirror, for example, when the vehicle is moving backward, when the first motor 12 is driven to rotate, it passes through the worm 11, the twin gear 8, and the intermediate gear 7. As a result, the rapid angle changing gear 2 rotates. At this time, since the slide member 3 is prevented from rotating with respect to the housing 1 as described above, the thread groove 14 on the inner peripheral surface of the gear 2 for rapid angle changing and the thread groove of the large-diameter thread portion 15 of the slide member 3 are provided. The slide member 3 is moved forward and backward by screwing with. Therefore, the nut adjust 6 screwed to the threaded portion of the slide member 3 also moves forward and backward, and at this time, the rotation ratio and reduction ratio of the motor,
If the advancing / retreating speed of the nut adjust 6 is set to be high by adjusting the lead angle of the screw, etc., the nut adjust 6 will slide rapidly in a short time. Therefore, the forward / backward speed of the nut adjust 6 becomes significantly higher when the first motor 12 is rotated than when the second motor 10 is rotated, and the mirror surface 26 is rotated by rotating the first motor 12. The angle of can be changed suddenly in the vertical direction.

That is, when the first motor 12 is rotated to one side so that the slide member 3 comes into contact with the front housing 1 or the claw 23 of the nut adjust 6 comes into contact with the tapered surface 18 of the intermediate plate 4, As shown in FIG. 5A, the mirror surface 26 is tilted downward, so that the vicinity of the rear wheel of the vehicle can be visually recognized. Further, when the first motor 12 is rotated to the other side and the slide member 3 comes into contact with the back surface side of the intermediate plate 4, the mirror surface returns to the original position as shown in FIG. That is,
As an operation different from the operation of the second motor 10 for adjusting the mirror surface angle, the mirror surface 26 can be rapidly tilted downward or returned to the original position.

FIG. 6 shows a mirror surface 26 by the first motor 12.
FIG. 6 is an explanatory view showing a relationship of engagement between the nut adjust 6 and the intermediate plate 4 when the is tilted downward (FIG. 7B) and in the original state (FIG. 6A). When the slide member 3 in the state of a) is moved forward and backward by the rotational drive of the first motor 12 and moved to the left side in the figure, the outer surface of the claw 23 of the nut adjust 6 is moved as shown in FIG. It comes into contact with the tapered surface 18 of the intermediate plate 4 and is pressed inward by the tapered surface 18. Therefore, as described with reference to FIG. 9 of the conventional example, the claw 23 of the nut adjust 6 is not displaced from the thread groove of the small diameter thread portion 17.

Next, the operation of the first motor 12 will be described with reference to the control circuit diagram shown in FIG. First,
When a DC voltage of, for example, 12 [V] (in this case, the terminal MF is positive and the terminal MR is negative) is applied between the terminals MF and MR, the terminal MF, the capacitor C1, the relay coil Rc1, and the diode D5 are applied. , A current transiently flows through the terminal MR. This energization activates the relay coil Rc1 to turn on the contact Ra1. As a result, the terminal M
Current flows through the path of F, contact point Ra1, PTC, first motor 12, resistor R3, terminal MR, and even after the capacitor C1 is saturated and the conduction is released, the resistor R1, the relay coil Rc1, and the diode. The relay contact Ra1 is held by the self-holding circuit by D5. Therefore, the first motor 12 is rotationally driven. At the time of startup, the relay coil Rc2 is also energized, so the relay terminal Ra2 is turned on,
Since both ends of the resistor R3 are short-circuited, a voltage drop due to R3 does not occur, so that the torque at startup becomes large. In addition, relayco
The energization of the coil Rc2 is only for a short time until the capacitor C2 is saturated. This causes a torque difference of the motor at the time of starting and stopping.

When the motor 12 rotates, the slide member 3 shown in FIG. 1 is located at the lowermost end, or the claw 23 of the nut adjust 6 hits the tapered surface 18 of the intermediate plate 4, or the slide member 3 moves. When it is located at the uppermost position, the rotation of the motor 12 is forcibly stopped, so that the current flowing through the motor 12 increases. Along with this, the current flowing through the resistor R3 also increases, and therefore the voltage across the resistor R3 increases. As a result, when the voltage applied to the light emitting diode D1 exceeds the threshold value, the light emitting diode D1 emits light, and the phototransistor Q interlocked with the light emitting diode D1 emits light.
1 energizes. Therefore, the potential difference between the contact point P1 and the terminal MR becomes almost zero, and the voltage is not applied to the relay coil Rc1 so that the relay coil Rc1 is turned off, the relay contact Ra1 is released, and the motor 12 is stopped. Note that, when rotating the motor 12 in the reverse direction, the operation is almost the same, and the description thereof is omitted.

In this way, in this embodiment,
When the slide member 3 is moved back and forth to rapidly change the angle of the mirror surface 26, a force is applied so that the outer peripheral portion of the claw 23 of the nut adjust 6 abuts the tapered surface 18 of the intermediate plate 4 and is pressed inward. Since the claw 23 does not move from the screw groove of the slide member 3, the nut adjust 6 can be reliably moved forward and backward. Therefore, when the mirror surface angle of the rearview mirror is suddenly changed downward by interlocking with the operation of putting the gear of the vehicle in reverse, the vicinity of the rear wheel of the vehicle can be reliably viewed, and the gear is changed from reverse to drive. When switched, it operates so as to surely return to a predetermined angle. Further, since the rapid angle changing gear 2 and the mirror surface adjusting gear 5 are supported by the intermediate plate, there is less rattling in the rotation operation of each gear 2 and 5, and stable operation is achieved. Furthermore, since the parts such as the action block 103 and the support member 104 shown in FIG. 7 can be omitted, it is possible to reduce the number of parts when configuring the angle adjusting device and to reduce the cost. At the same time, the size of the device can be reduced.

[0028]

As described above, according to the present invention,
When the mirror surface angle of the rearview mirror is rapidly tilted, the locking piece (claw 23) of the pressing member (nut adjust 6) is pressed inward by the tapered surface of the intermediate plate, so that the locking piece is screwed on the slide member. It will not fall out of the groove. Therefore, when the mirror surface angle is returned to the original position, it can be surely returned to the original position. Further, in the present invention, since the rotationally fixed gear and specular adjustment gear for rapid deformation rapidly bending gear and specular adjustment gear is to operate stably with an intermediate plate, In addition, the number of parts can be reduced as compared with the conventional one. As a result, it is possible to obtain the effects that the number of assembling steps can be reduced, the cost can be reduced, and the device can be downsized.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of an angle adjusting device according to an embodiment of the present invention.

FIG. 2 is a sectional view of an angle adjusting device according to an embodiment of the present invention.

FIG. 3 is a plan view of the angle adjusting device according to the embodiment of the present invention.

FIG. 4 is a control circuit diagram of a motor (first motor) for rapid angle changing.

FIG. 5 is an explanatory view showing a state when the mirror surface is bent downward and a state when the mirror surface is in a normal position.

FIG. 6 is an explanatory view showing the positional relationship between the nut adjust and the intermediate plate when the slide member is moved back and forth.

FIG. 7 is an exploded perspective view of a conventional angle adjusting device.

FIG. 8 is a sectional view of a conventional angle adjusting device.

FIG. 9 is an explanatory diagram showing a state in which the claw of the nut adjust slips from the thread groove.

[Explanation of symbols]

1, 101 Front housing 2 Rapid change gear 3,102 Sliding member 4 Intermediate plate (positional deviation preventing means) 5 Mirror surface adjusting gear 6,108 Nut adjust (pressing member) 7 Intermediate gear 8,109 Twin gear 9,11 Worm 10,111 Second motor (second driving means) 12,113 First motor (first driving means) 13 Gear groove 14 Screw groove 15 Large diameter screw portion 16 Notch 17 Small diameter screw portion 18 Tapered surface 19 Stop groove 20,116 Movable pivot 21 Fin 22 Projection portion 23,114 Claw (locking piece) 24 Large diameter gear 25 Small diameter gear 26,119 Mirror surface 27 Support point 28 Third motor 29 Nut adjust 30 Gear groove 31 Fixing pin 33, 34, 39 Rings 35, 36, 38 Annular groove 37, 107 Rear housing 103 Action block 104 Support Gear member 105 fan-shaped gear 106 worm wheel 110, 112 worm 115 screw part 117 pin 118 cam groove

Claims (2)

(57) [Claims] 1. An angle adjusting device for a rearview mirror capable of finely adjusting an angle of a mirror surface mounted on a rearview mirror for a vehicle, and for suddenly changing the mirror surface angle so that the vicinity of a rear wheel can be visually recognized when a vehicle retreats. A cylindrical quick-changing gear that is rotatably attached to a front housing fixed in the mirror housing, has a gear groove engraved on the outer periphery, and has a female screw groove engraved on the inner periphery. A first motor that meshes with an outer peripheral gear groove of the rapid angle changing gear to rotate, and a male screw groove that meshes with an inner peripheral thread groove of the rapid angle changing gear is engraved. A slide member, which comprises a large-diameter screw portion and a small-diameter screw portion having a male screw groove formed therein, and which is prevented from rotating with respect to the front housing, and a pivot end abutting on the rear surface side of the mirror surface. And has a locking piece at the rear end. A pressing member that is screwed into the small-diameter threaded portion of the slide member, a mirror surface adjusting gear that rotates together with the pressing member and has a gear groove formed in the outer peripheral portion, and a gear groove of the mirror surface adjusting gear. Second meshing and rotating
Of the motor, and is interposed between the rapid-angle-changing gear and the mirror-surface-adjustment gear, and a through-hole through which the small-diameter screw portion of the slide member is inserted is opened in the central portion of the rapid-angle-changing gear. CFC
Thereby rotatably supported on the preparative housing, have a, and an intermediate plate for supporting rotatably the mirror surface adjustment gear in the rear housing, on the inner surface of the central portion through hole of the intermediate plate, the quick
The sliding member and the pressing member by the rotation of the angle changing gear.
Is pressed when the slides to the front housing side
Tapered surface that abuts the outer periphery of the locking piece and presses inward
Angle adjustment device of a rearview mirror, characterized in that the formation of the. 2. The angle adjusting device for a rearview mirror according to claim 1 , wherein an outer peripheral portion of the locking piece is notched in a tapered shape.